mud pump blows all 3 swabs for sale

“Once you know these (rotary screw air) compressors, they’re pretty simple,” says Garth Owens, president of Drill Tech Drilling & Pump Inc. in Chino Valley, Arizona. “It’s not rocket science, but it is a precision unit.”

With approximately 15 rotary screw air compressors (two piston booster compressors) on six drill rigs or as auxiliaries on 10 pump hoists, Owens has learned the mechanical intricacies of them. He has rebuilt the compressors, changed their gear sets, and replaced them on rigs while passing along his knowledge to others in the industry.

“A lot of guys who are drilling don’t even have the right air to develop a well and they’ll throw a pump down there and just try to pump out the mud,” says Garth’s son, Nick, the manager at Drill Tech. “It destroys pumps and you’re never getting that mud wall cake off the walls behind the gravel pack to really get what the well’s producing.”

“You can drill too big of a well to where the annulus is too big, and you can’t get through the gravel pack to get the walls clean. That’s a big problem. A lot of guys think the bigger the hole they go, the more gravel the better, which isn’t necessarily good because you can never get enough annular velocity to get through the gravel pack and get that mud cake off. So, you’ve got to step back and look at the big picture of your annulus to your casing size to your gravel pack.

“Depending on what size drill pipe, what size borehole, what that annular space is between the drill pipe and the borehole determines the amount of your cubic feet per minute,” Garth Owens explains. “And then your pressure is determined by how deep you’re going to go. Every 2.31 feet of water is one pound of pressure you have to overcome, so basically, it’s a 2-to-1 ratio.

Today’s standard rotary screw air compressor rating is at least 900 cfm or 1000 cfm/350 psi. Thirty years ago, the standard was 450 cfm/250 psi or 600 cfm/250 psi.

For example, a 750 cfm/125 psi compressor is half the compressor of a 750 cfm/250 psi compressor because the contractor is compressing the air twice as tight. Therefore, with a 750 cfm/350 psi compressor, the contractor is compressing the air an additional 50%.

To help visualize it, Garth Owens likens pressurizing the compressor to a scuba tank getting pressurized rather than simply filling a balloon with static pressure.

“Instead of putting 125 pounds in it, in order to put 250 pounds in it, it takes a bigger screw and more horsepower to do that,” he shares. “And then to go to 350, it takes a bigger compressor and more horsepower to do that. So, every compressor has two numbers—cfm, and the second number is the amount of pressure that it puts out at that number.

“For instance, for a 750/125 compressor, it’ll probably take 125 horsepower to run that. You go to 750/250, it’ll take you 300 horsepower. You go to 750/350, it’ll take 400 horsepower to do the exact same thing because you’re compressing tighter, tighter, and tighter it takes more horsepower to overcome that pressure. So, the higher the pressure, the more horsepower you need.”

“Typically, ballpark rule of thumb, standard compressor is 125 to 150 psi,” Garth Owens says. “High pressure is 175 to maybe 200 psi. Extra high pressure is usually 350 psi and the highest you’ll ever go on a screw compressor is 500 psi. That’d be extra extra high pressure to get to 500 psi. Anything after that you’re running through a piston booster compressor and boosting pressure with a piston.

“When you get into the high-pressure compressors, it takes a lot of horsepower, takes a lot of heat, it builds up a lot of heat, and it burns a lot of fuel, so if the radiators aren’t clean, if the fanbelts are slipping, if the radiator is plugged up. . . .It might run great at 250 pounds; you push it at 350 and 30 minutes later the rig is overheated.”

To decrease the uphole velocity of 3000 feet per minute, some contractors use drill foam to clean the well at half the amount, 1500 feet per minute. “If you’re using foam and you’re filling that void, you’re taking half of that void away,” Garth Owens says. “You’re using half the air because you’re filling that void with an artificial substance. It’s going to foam up and blow out and then it’s going to evaporate and go away.”

The double-swabbed tool has perforations between the two swabs. Airlifting typically occurs through the drill pipe “from which the development swabs are suspended, so as the swabbing action brings suspended solids into the well, they are purged by the simultaneous airlift system,” writes Marvin F. Glotfelty, RG, in his book, The Art of Water Wells.

“The air comes out of the end of the drill pipe, comes up and hits that rubber swab which is the same diameter as the casing,” Garth Owens says, “and therefore all that air has to go out the perforations, blows into the gravel pack, spins that around in there, and cleans the gravel pack and cleans the borehole. Then the water comes up through the gravel pack and comes back to the perforations above your swab and comes out the top of the well.”

Glotfelty writes how this well development method is effective because “it provides both inward and outward energy to break down and remove the wall cake, without forming sand bridges in the adjacent formation.”

“We’ll actually create a vacuum and pull it between sections there,” Nick Owens says. “That’s why there’s a rubber swab above and below the holes. Typically, if you want to do an air swabber, you don’t need the rubbers because you’re just blowing it out through the perforated screen into the formation.”

The company’s high-velocity horizontal jetting tools allow it to adjust the amount of air it needs to push through them. “That way it’s blowing the air through the perforated screen, through the gravel pack, and then we’re trying to develop all that mud off there if it’s a mud hole,” Nick Owens says.

The company has an additional high-velocity jetting ball tool with approximately 20 holes each drilled to 3/16 inches around it. A high-pressure pump is used to pump freshwater down the well at 2000 psi.

“That will not only churn and turn that gravel, but it places that mud thinner all the way back to the borehole to knock off the wall cake,” Garth Owens says, “and once you’re done pressure jetting it, then you’ll come back and re-swab it and RC it all back out of there.”

Drill Tech, which had a backlog of approximately 100 wells and 30 pumps to install as of late July, stresses it all starts with the design of the well, drilling it correctly, using the right products, and not overusing polymers.

“If we’re RC drilling, we’ll mud up the top and then we’ll case the top off,” Nick Owens says. “There’s some wells out here where we live where the top 300 feet is all alluvium and there’s no water in it. We’ll mud those up, we’ll set a 300-foot surface casing, and we’ll RC drill the bottom out with just pure water because it’s just solid rock. So, we don’t use any product.

“We can literally drill a 1200-foot well, pull out, put our casing in it, and gravel pack it. You can trip in as soon as we’re done with zero development and can video the well, it’s that clean. Something of that nature doesn’t take much development because we didn’t put any product in the well. It just depends on where we are.”

To drive home the importance of using the correct amount of product, Nick Owens recalls a large drilling company that installed two large municipal wells 10 years ago in central Arizona. It both drilled with and pumped too much polymer into the wells and was unable to get the polymer out. The wells produced 300 gpm.

“We drilled some other wells near them, and we got 1200 gallons per minute out of the wells and the aquifer just simply because of the development and not using polymers,” he says, “so [it’s] a big thing to make sure of the product when you’re drilling and make sure you’re using the right product that you can get back out—that’s the biggest thing.”

“Most guys will just trip their drill pipe straight in, blow it straight up the hole, and they’re done,” he shares. “But you’ll get a lot more water out of your well, you’ll pump a lot less sand, and you’ll have a much better production well with a higher pumping level if you clean that formation out and get every bit of that mud that you put in back out again. The only way to do that is with pressure through the perforations.”

While drilling in July in California, Garth Owens also noticed large amounts of gravel being put into large diameter wells drilled using the mud rotary method. “They think that the bigger the hole is, the more gravel they put in, the better it is, which is not true. What they don’t get is the bigger the hole gets, the worse development job you can do.

“Let’s say you drill a 16-inch hole and put in 6-inch casing, and you’ve got 5 inches of gravel on either side of you, you cannot get enough pressure through 5 inches of gravel to clean the wall cake off the borehole on the outside to get it to produce. The well is still going to produce, but it would be a lot better producing well if it has 2 to 3 inches of gravel and you’ve got enough energy that you can push through that.”

Low-cost gravel too has its disadvantages, with it being crushed and therefore angular. These angular pieces all wiggle together and lock together like chip seal on a highway in the well, according to Garth Owens. This causes a slowdown in the production of water.

“Most people don’t use any chemicals to break down that wall cake because it costs $250 a bucket,” he says, “so we’ll go out and drill a well that will make 500 gallons per minute, and our competition literally on the next lot is drilling 100 gallons a minute. And it’s simply because of the gravel pack and the development process.”

“Time is one factor, they want to get to the next job,” Garth Owens says. “Another factor is they don’t want to put a swab in to pressurize the perforations. The third thing is purchasing the cheapest gravel they can because they think they’re going to overcome all that by drilling a hole that’s one or two inches bigger in diameter and now all that other stuff is irrelevant.”

Install the largest gravel to have the most square inches of opening and the least friction for the water to come through but stop the finest particles of sand.

“You design with maybe a 10 percent passing of sand,” he says, “and then you want to go down there and develop it until that 10 percent gets down to 0.5 percent or 0.25 percent. You want to airlift develop that until you’ve blown out everything, you’ve agitated it, washed out the gravel, washed off the wall cake, and then the ground itself and those fines come out of there.

“If you don’t do it right, you can spend three or four days pumping sand because the gravel is too coarse. You put in too coarse of a filter and the sand just keeps flowing. It takes forever, if it ever does stop. Too coarse of a sand and it’ll never stop.”

For a high-pressure compressor, there are three gears in the bellhousing and two low-stage screws and two high-stage screws. The simplicity allows the compressor to last for an average of 10,000 hours.

“Because on a piston compressor, you just have a receiver tank that just holds air,” he says, “and you can pressure it up to 250 to 300 pounds and jerk the valve open and that big surge of air is what blows out silts and rocks when it won’t do it when steady drilling.

“On a screw compressor, when you max out the pressure at say 350 pounds, and you’ve got the same pressure inside the filter as you do on the outside of the filter, when you blast that ball valve open, the pressure differential escapes faster inside than it can equalize. That’s what causes that filter to collapse and blow all your oil down your hose. That’s the one and only thing you don’t do with a screw compressor—build up to max pressure and jerk the valve open—that you can do with a piston compressor.”

For years, automatic transmission fluid (ATF) was the standard for lubrication on compressors. Today, synthetic compressor oil is used because they must run at about 225 degrees to 275 degrees to vaporize the water as it sucks moisture out of the air when drilling. “It sucks all that moisture into it and it rusts up all the bearings and gears,” Garth Owens says, “so by turning the thermostat up so hot, it vaporizes and burns the condensation out of it.

“You hear about a lot of rigs burning down and compressors burning down, it’s typically because they have old non-synthetic oil because it costs less,” Garth Owens says. “What happens is the tolerances are very tight in a screw compressor.

“Typically, there’s three thousandths max tolerant in a screw compressor, so you really have to keep your air filters clean, your oil filters clean, and your oil good. When that tolerance starts to get loose, when you start getting a bearing wearing out or one of your screws starts wearing into the impeller of the compressor, when that tolerance starts to get loose at all, typically your oil temperatures skyrocket tremendously. It’ll run at 200 degrees for 10 years and then all of a sudden, you’re wondering why it’s running at 275 degrees and trying to cook the hoses off your rig.”

The first indication is typically losing a bearing when the oil temperature begins climbing with the tolerances getting loose. “You either have steel on steel friction, or the tolerance is so loose that after you’ve compressed this air and oil, it scoops up the air and oil and pushes it through the screw,” Garth Owens says.

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Absentee Bid - A procedure which allows a bidder to participate in the bidding process without being physically present. Generally, a bidder submits an offer on an item prior to the auction. Absentee bids are usually handled under an established set of guidelines by the auctioneer or his representative.

Absolute Auction - An auction where the property is sold to the highest qualified bidder with no limiting conditions or amount. The seller may not bid personally or through an agent. Absolute auctions are also known as an auction without reserve.

Accredited Investor - A person or institution deemed capable of understanding and affording the financial risks associated with the acquisition of unregistered securities. The federal securities laws define the term accredited investor in Rule 501 of Regulation D as:a bank, insurance company, registered investment company, business development company, or small business investment company;

a natural person with income exceeding $200,000 in each of the two most recent years or joint income with a spouse exceeding $300,000 for those years and a reasonable expectation of the same income level in the current year; or

Abandon - A well is permanently plugged and abandoned if it is drilled and found to be a dry hole, or in the case of a producing well, it is not economically productive.

Acidizing- A technique for increasing the flow of oil and/or gas into a well. Hydrochloric acid is pumped into the oil-bearing rock. The acid dissolves limestone in the producing zone enlarging pores and flow into the well bore with less restrictions.

Auction With Reserve - An auction in which the seller or his agent reserves the right to accept or decline any and all bids. A minimum acceptable price may or may not be disclosed and the seller reserves the right to accept or decline any bid within a specified time. See absolute auction for the definition of an auction without reserve.

Authorization for Expenditure (AFE) - An estimate of the costs of drilling and completing a proposed well, which the operator provides to each working-interest owner before the well is drilled. Various categories of costs are typically listed as "dry hole" costs (the costs to drill to the casing point; these are costs that would be incurred if no indications of hydrocarbons are found), completion cost (the additional costs to complete the well), and the total cost.

Back In - The type of interest in a well or property that becomes effective at a specific time in the future, or on the occurrence of a specified future event; usually pay out to investors of their initial well costs.

Behind Pipe- If a well drills through more than one pay zone and is completed in the deepest productive reservoir, casing is set all the way down to the producing zone. Viewed from (a perspective) inside the borehole, reserves in the shallower pay zones up the hole are behind the casing (pipe).

Bidder`s Choice- A method of sale whereby the successful high bidder wins the right to choose a property or properties from a grouping of similar or like-kind properties. After the high bidder"s selection, the property is deleted from the group, and the second round of bidding commences, with the high bidder in round two choosing a property, which is then deleted from the group and so on, until all properties are sold.

Blowout - The uncontrolled flow of gas, oil or other fluids from a well. This happens when the down-hole pressure gas is not properly balanced by the weight of drilling mud.

Blowout Preventer (BOP) - The equipment installed at the wellhead to control pressures in the annular space between the casing and drill pipe or tubing during drilling, completion, and workover operations. Also known as a Christmas tree.

Broker Participation - An arrangement whereby 3rd-party brokers register potential bidders for properties being sold at auction for a commission. The commission is paid by the owner of the property or the auction firm.

Cased Hole - A well in which casing has been inserted. If the casing does not extend all the way to total depth, the uncased portion is referred to as an open hole.

Cementing or "Setting Pipe" - A process whereby cement is pumped into the hole between the walls of the hole and the outside of the casing. Upon hardening, the cement holds the pipe in place and prevents fluid movement in the hole.

Circulation - The continuous pumping of drilling fluid ("mud") from mud tanks at the surface: down through the drill pipe, out the nozzles of the drill bit, and back to the surface through the space between the drill pipe and the borehole. The flow of mud moves the rock cuttings and carries them up to the mud system, by the shale shaker.

Coiled Tubing- A long, small diameter pipe flexible enough to be stored on and deployed from a large, truck-mounted roll. It is used to replace jointed pipe in certain types of drilling, completion, and workover operations.

Completion - A general term referring to all activities necessary to put a well on production after it has been drilled to casing point. The completion phase of operations generally includes cleaning out the well bore, setting the casing and tubing into the hole, adding surface equipment (pumps, tanks, meters) and perforating the casing so that oil or gas can flow into the well and be brought to surface. Once a well is completed, it is ready to produce oil or gas.

Condensate - Hydrocarbons naturally occurring in the gaseous phase in the reservoir that condense into a liquid at the surface (due to the change in pressure and temperature).

Conditions of Sale - The legal terms that govern the conduct of an auction, including acceptable methods of payment, terms, buyer"s premiums, possession, reserves and any other limiting factors of an auction. They are usually included in published advertisements or announced by the auctioneer prior to the start of the auction.

Convertible Interest- An interest (usually a non-cost-bearing interest) that may, at the option of the owner or on specified date or owner occurrence be changed into another type of interest (usually a cost bearing interest). Example: a 5% overriding royalty convertible to a 1/8 (=12.5%) working interest after payout.

Core - A cylindrical column of rock usually 4 to 6 inches in diameter cut in lengths of about 30 feet by a special drill bit (the operation is like removing the core from an apple). After the core has been brought to the surface, it is examined by geologist for shows of hydrocarbons.

Daily Drilling Report - A record / report of the daily operations on a working drilling rig and, traditionally, phoned, faxed, emailed, or radioed in to the office of the drilling company and possibly the operator every morning.

Density Log - A special radioactivity log for open-hole surveying that responds to variations in the specific gravity of formations. It is a contact log (i.e., the logging tool is held against the wall of the hole). It emits neutrons and then measures the secondary gamma radiation that is scattered back to the detector in the instrument. The density log is an excellent porosity-measure device, especially for shaley sands. Some trade names are Formation Density Log, Gamma-Gamma Density Log, and Densilog.

Depletion Allowance - An allowance granted on taxable income from oil and gas by the Federal and most State Governments. The current Federal rate is 15% of gross income.

Desander - A centrifugal device for removing sand from drilling fluid to prevent abrasion of the pumps. It may be operated mechanically or by a fast-moving stream of fluid inside a special cone-shaped vessel, in which case it is sometimes called a hydro-cyclone.

Dipmeter Survey - An oil well surveying method that determines the direction and angle of formation dip in relation to the borehole. It records data that permit computation of both the amount and direction of formation dip relative to the axis of the hole and thus provides information about the geologic structure of the formation. It is also called a dipmeter log or dip log.

Directional Drilling - Drilling in a direction away from the natural direction a wellbore would take. Today"s sophisticated rotary steerable tools allow operators to steer around rock or wellbore damage.

Displacement Fluid - In well cementing, the fluid, usually drilling mud or salt water, that is pumped into the well after the cement is pumped into it to force the cement out of the casing and into the annulus (the space between the casing and the outer wall of the well bore).

Drawworks - The hoisting mechanism on a drilling rig. It is essentially a large winch that spools off or takes in the drilling line and thus lowers or raises the drill stem and bit.

Drill Collars - A heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem, used to stiffen the drilling assembly an put weight on the bit so that the bit can drill.

Drill Pipe- The heavy seamless tubing used to rotate the bit and circulate the drilling fluid. Joints of pipe are generally approximately 30 feet long are coupled together by means of tool joints.

Drilling Break- A sudden increase in the rate of drilling. Usually it indicates that the drill bit is penetrating a porous layer of strata and/or can indicate crossing a fault.

Drilling Engine - An internal-combustion engine used to power a drilling rig. These engines are used on a rotary rig and are usually fueled by diesel fuel, although liquefied petroleum gas, natural gas, and, very rarely, gasoline can also be used.

Drilling Fluid (Mud) - Circulating fluid, one function of which is to lift cuttings out of the wellbore and to the surface. It also serves to cool the bit and to counteract downhole formation pressure.

Electronic Flow Meter - A device used for monitoring barrels of oil and MCF of gas flowing from the wellhead. Measurements are typically expressed in real time, actual flow cumulative flow and historical data.

Enhanced Oil Recovery (EOR)- Refers to a variety of secondary and tertiary recovery processes to increase the amount of oil removed from a reservoir, typically by injecting a liquid (e.g., water, surfactant) or gas (e.g., nitrogen, carbon dioxide).

Fishing - The procedure of locating and retrieving an object (a "fish") that has accidentally fallen into, or been left in the borehole, and must be retrieved before mechanical operations can be resumed.

Flooding- One of the methods of enhanced oil recovery. The general method involves pumping (injecting) a fluid (commonly water) into the reservoir, through wells located around the perimeter of an oil field. The "pressure front" that is created, flushes oil toward the central part of the field, resulting in increased production.

Flowing Well - A well capable of producing oil or gas by its own energy without the aid of a mechanical pump. Normally a pump is put on the well after the pressure reduction inhibits the rate of production.

Field - An area consisting of a single reservoir or multiple reservoirs all grouped on, or related to, the same individual geological structural feature or stratigraphic condition. The field name refers to the surface area, although it may refer to both the surface and the underground productive formations.

Fracturing - A procedure undertaken to attempt to increase the flow of oil or gas from a well. A fluid is pumped into the reservoir, with tremendous forces that the reservoir rock is physically broken and split open. usually the "frac fluid" carries small pellets or beads mixed in with it; the idea is for them to get caught in the fractures and prop them open (the beads or pellets are called the propping agent or proppant). As the pumping pressures are gradually released at the surfaces, the natural reservoir pressures will force the "frac fluid" out of the reservoir, and back into the well as the well begins to flow. The proppant remains behind., holding the fractures open, thereby increasing the flow of oil or gas from the reservoir into the well. This procedure is also called hydraulic fracturing. "To frac a well" means to hydraulically fracture a reservoir in a well.

Gas Lift - A method of secondary recovery similar to gas injection, except that the injection well and the production well are both the same well. Dry natural gas is pumped down through the space between the casing and the production tubing, and into the reservoir. Gas dissolves into the oil increasing the oil"s ability to flow, and reservoir pressure is increased around the well. The procedure of injecting gas and then flowing the oil-and-gas mixture is carried on intermittently. The gas is separated from the mixture at the surface, where it is stored for re-injection.

Gas-Oil Ratio (GOR) - The volume of gas produced along with the oil from an oil well, usually described in MCF (thousands of cubic feet of gas) per barrel of oil.

Horizontal Drilling- The new and developing technology that makes it possible to drill a well from the surface, vertically down to a particular depth and then to turn a right angle, and continue drilling horizontally within a specified reservoir, or an interval of a reservoir.

Hot Oiling - Production of parafinic crude oil usually tends to decline rapidly (as the paraffins in the oil clog the porosity surrounding the well bore). Hot oiling is a method of (temporarily) alleviating this situation by using heating equipment and special procedures to increase the temperature in the reservoir close to the borehole, thereby liquefying the paraffin, and unclogging the pore spaces.

Initial Production (IP)- Production from a well is generally broken down into three categories: a. Flush or Initial b. Settled c. Stripper. It is important for investors to realize that a well cannot maintain the flow rates it made during the first stages of its life.

Injection Well- A well where gas or water is injected back into the reservoir, usually to increase pressure and thereby stimulate production. In a gas injection well, gas is reinjected into the upper gas portion of the reservoir. Water injection wells are typically found offshore.

Joint Operating Agreement (JOA)- A detailed written agreement between the working interest owners of a property which specifies the terms according to which that property shall be developed.

Kelly Bushing (KB) - Part of the drilling rig, the Kelly is a long hollow steel bar that connects to the upper most end of the drill string. it is square or hexagonal in cross-section. The Kelly bushing is a "sleeve" in the rotary table through which the Kelly can freely move up and down during drilling. The depth to a particular zone for a well is generally measured from the Kelly bushing, which can be anywhere from about 5 to 50 feet above ground level (dependent on the type and size of drilling rig used).

Lease- A contract by which the owner of the mineral rights to a property conveys to another, the exclusive right to explore for and develop minerals on the property, for a specified period of time. The conveying party is "lessor"; the mineral rights owner. The recipient is "lessee". The terms of the lease are typically negotiated between company, and the owner of the mineral rights.

Lifting Costs - The cost involved in lifting (pumping) oil from a producing reservoir in a well, up to the surface, including the lease operating cost.

Lost Circulation - Occurs when drilling fluid escapes from an uncased well bore into porous zones, or holes such as fractures or caverns that occur naturally in the underground formations.

Midstream - A term sometimes used to refer to those industry activities that fall between exploration and production (upstream) and refining and marketing (downstream). The term is most often applied to pipeline transportation of crude oil and natural gas.

Mineral Rights (Interest) - The ownership of all rights to gas, oil, and other minerals as they naturally occur in place, at or below the surface of a tract of land. The mineral owner may execute an oil or gas lease conveying his mineral interest in a tract of land.

Mud, or Drilling Mud - A specialized mixture of fluids and solids, or liquid and gaseous fluids, used in drilling wellbores. There are many types of these drilling fluids, usually categorized by the major component such as water-base drilling fluid, gyp mud, emulsion mud, etc. See also drilling fluid.

Natural Gas Liquids (NGL)- The portions of gas from a reservoir that are liquefied at the surface in separators, field facilities, or gas processing plants. NGL from gas processing plants is also called liquefied petroleum gas (LPG).

Oil (API) Gravity - The most widely used indicator of a crude oil"s worth to the producer is its API gravity. The less dense oils have a higher API gravity and are generally the most valuable.

Percentage Lease - A lease of property in which the rent is based upon the percentage of the sales volume made on the specific premises. There is usually a clause for a minimum rent as well.

Perforate, or "perf" - "perfing" - a well means to create holes in the casing or liner of the wellbore through which oil and gas flows from the reservoir up to the surface. Perforation is accomplished with a perforating gun containing strategically placed explosive charges that is lowered into the wellbore.

Perforating Gun- An instrument lowered by a wireline into a cased well. It contains explosive charges that are electronically detonated from the surface. When it is on the level of the pay zone, the bullets are shot into the reservoir rock, piercing the casing (and surrounding cement sheath). The resulting holes allow hydrocarbons to flow from the pay zone into the borehole.

Permeability - A measure of the ability of a rock to transmit fluid through pore spaces. Rocks may have holes or void spaces in them (porosity), but if these holes do not connect, the permeability can be drastically reduced.

Plugged and Abandoned (P&A) - A depleted well or dry hole that has been (typically) filled with cement and marked, with all surface equipment removed.

Produced (Formation) Water - The water extracted from the subsurface with oil and gas. It may include water from the reservoir, water that has been injected into the formation, and any chemicals added during the production/treatment process. Produced water is also called "brine" (and may contain high mineral or salt content) or "formation water."

Pumper - An employee of an operator who is responsible for gauging the oil and gas sold off the leases he has been assigned and who is also responsible for maintaining and reporting the daily production.

Reserves- The amount of oil and gas in a reservoir currently available for production, usually described as barrels of oil, or MCF (thousands of cubic feet) of gas, attributable to a well, to a property, or to an entire field.

Risk- Literally: "the possibility of loss or injury". In oil and gas exploration, a level of uncertainty is associated with the various possible outcomes of the undertaking.

Roughneck- One of the two or three field-hands on the derrick floor during drilling operations, whose job revolves around breaking out the drill pipe, making connections, and stacking drill pipe. It is a tough, physically demanding, and very dangerous job.

Salt Water Disposal Well - Many wells produce salt water while producing oil. The disposal of this water is a problem to an operator because of pollution. The best solution to the problem is to pump the waste back into a formation that is deep enough not to pollute shallow water sands. Many stripper wells which are no longer commercial are converted for this purpose.

Sandstone - Rock composed chiefly of sand-sized particles or fragments of the mineral quartz. Individual grains seem to be naturally "glued" together by the mineral calcite.

Saturation- (1) Water-Saturation: the fluid contained in the pores of an oil and gas rock which usually consists of a mixture of water plus oil and gas. Water-saturation is the percent of water contained in the mixture. A low water-saturation (25% for example) implies a high concentration of hydrocarbons (approximately 100-25=75%) and suggests that the rock will produce oil or gas. (2) In a reservoir containing oil, the crude oil is said to be saturated when it contains dissolved natural gas. Any excess gas would accumulate above the oil as a gas cap.

Sealed Bid- A method of sale utilized where confidential bids are submitted to be opened at a predetermined place and time. Not a true auction in that it does not allow for reaction from the competitive market place.

Secondary Recovery - A broad term encompassing any method of extracting oil from a reservoir after a well or field has exhausted its primary production. After primary recovery operations have taken their course, various operations may be taken to increase the amount of oil by normal methods of flowing and pumping. The second stage to increase production is by addressing the condition of the reservoir. Typical operation may involve forcing gas ("gas injection"), or water ("water flooding") into the reservoir. This re-pressurizes the reservoir, which allows recovery of more oil than would be possible from primary recovery.

Securities - Securities are commonly thought of as stocks and bonds. As defined by the Securities Act of 1933, securities include any certificate of interest or participation in any profit-sharing agreement, investment contract, or fractional undivided interest in oil, gas, or other mineral rights.

Securities Act of 1934- Established the Securities and Exchange Commission which regulates the activities of securities markets and their offering requirements.

Sedimentary Rock- Rock that is naturally formed from fragments of other rocks by compression. Sedimentary rocks are important in terms of petroleum because sandstone and limestone are often reservoir rock. Rock is generally classified in one of three categories; sedimentary, igneous or metamorphic.

3-D Seismic- An exploration technique used in the search for oil and gas underground structures. The basic premise behind seismic is the same as ultra sound technology used in the medical field. Sound from a shot hole is recorded from geophones and interpreted to give a picture of the underlying structures within the earth. 3-D has now become a common practice to redefine and identify known as well as unknown structures. Many times these structures contain traps that hold oil and gas yet to be discovered.

Separation- The process of separating liquid and gas hydrocarbons and water. This is typically accomplished in a pressure vessel at the surface, but newer technologies allow separation to occur in the wellbore under certain conditions.

Shale- A type of rock composed of clay or mud. When the clay is compacted under great pressure and temperature deep in the earth, water contained in the clay is squeezed out, and clay turns into shale.

Shut-In Royalty- A special type of royalty negotiated when leasing a property. It commonly pertains to gas production. If a commercially producible gas well is shut-in due to the lack of a gas market, the (pipeline access) lease will remain in effect as long as the working-interest owner (leasee) pays the specified shut-in royalty to the mineral-rights owner (lessor).

Surface Pipe- Pipe which is set with cement through the shallow water sands to avoid polluting the water and keep the sand from caving in while drilling a well.

Tubing - A small diameter pipe or tube threaded at both ends, that is lowered into a completed well. Oil and gas are produced through a string of tubing (which can be periodically removed for maintenance).

Turnkey- A drilling contract that calls for a drilling contractor to drill a well, for a fixed price, to a specified depth and to adequately equip it so that the operator need only turn a valve and oil will flow into the tanks or gas into the pipeline.

Turnkey Contract - A contract in which an operator or drilling contractor agrees to furnish all labor and materials necessary to drill a well to a certain depth or stage of completion for a specified sum of money. The operator or contractor assumes all of the responsibility and risks involved in completing the operation.

Viscosity - The resistance of fluid to flow. A high viscosity fluid will not flow as easily as a low viscosity fluid (Mud will not move as easily as water).

Wall Sticking- A condition in which a section of the drill string becomes stuck on the deposits of filter cake on the sidewall of a bore hole of a well.

Wasting Assets- Assets that will eventually lose their value: by depletion as they are produced (natural resources such as oil, gas, minerals, and timber), or by the passage of time (leased mineral rights, patents).

Weevil- An unglamorous adjective (or noun) used to describe a "green" hand anyone new and uninitiated, especially to the mechanical operations of an oil rig.

Wet- A reservoir rock is considered to be "wet" when it contains water but no hydrocarbons. (Ironically, a well that finds only a wet reservoir, is called a dry hole.)

Whipstock- A steel blocking device placed in the bottom of a borehole. When drilling is resumed, the whipstock forces the drill bit to veer off at a slight angle. The deviated portion of the borehole is called a side track.

Wildcat- An exploratory well drilled to a reservoir, from which no oil or gas has previously been produced in the nearby surrounding area. When the well is located far away from all previous drilling attempts, it might be called a "rank wildcat".

Workover- Operations on a producing well to restore or increase production. A workover may be performed to stimulate the well, remove sand or wax from the wellbore, to mechanically repair the well, or for other reasons.

GARDNER DENVER 3000(Ref#15370Ra)  Manufactured 1982, 7-1/4 x 14" mud pump, 100 ton block, 17-1/4" rotary table, 2 engines (Cat and Detroit diesel), single drum, mounted on 3-axle trailer, located Mexico  PRICE:  $245,000

GARDNER DENVER 3000(Ref#9778T) Manufactured 1975. Single drum drawworks, trailer mounted, 75" telescoping mast, Hacker rotary table, set up for reverse air drilling, 6" kelly, kelly hose, 2" air hose, 12,000# working winder, wireline winch, tongs, counterweight, substructure, doghouse, tongs, just completed a job in 2020   Price: $110,000

GARNDER DENVER 3000(Ref#15370Rb)  Manufactured 1974, 7-1/4 x 10" mud pump, Detroit 8V71 diesel engine, single drum with auxiliary drum, 17-1/4" rotary table, 75 ton block, mounted on 3-axle trailer, located Mexico  PRICE:  $170,000

GARDNER DENVER 3000(Ref#8732N) Manufactured in 1989, 18" Gardner Denver RT-18 rotary table, single drum drawworks with 132,000# capacity with 6 lines, SSW 125 Gardner Denver swivel, 4 ¼" X 40" Kelly, Bushing Kelly, 100 ton Gardner Denver Block/hook, Gardner Denver FY-FXD  7-1/2" X 10" Mud Pump,  Sand Reel , Parmac Hydromatic Brake, Martin Decker weight indicator, 4 hydraulic leveling jacks, mounted on 3 axle trailer, GMC 671 engine, Detroit Series 60 diesel engine, double section mast 98" x 200,000#, 2 Foster catheads, 2 brake tongs with hydraulic jack, Mud Cleaning System Mud tank 2 centrifugal pumps, 1 Liner shale shaker and 6 cone desanders, trash pump, located Mexico Price on Request

GARDNER DENVER 3000 DOUBLE DRUM(Ref#6059R)  Manufactured 1977, 95’ x 200,000# hookload capacity mast, vertical freestanding hydraulically rasied and scoped w/stabbing board, double drum drawwork, 121 Hydramatic brake, 1” drill line, p/b (2) 671 Detroit engines (175 hp) each thru compound case, Low back substructure 8’ x 8’ x 4’ clerance under table platform, mud boat, Howard Turner 18” rotary table, King 75WP swivel, 4-1/2” x 40’ square kelly with roller type bushing, (1) Mud King 110 ton with (4) sheave traveling block, elevator links.  BJ Type LF-BF Model CTS power casing tongs w/ 2-3/8”, 2-7/8” and 4-1/2” jaws,  225 bbl mud tank w/ 5 x 6 x 11 Mission Magnum mix pump, Derrick FLC 503 Flo Line shaker (no cones) p/b John Deere diesel engine, 80 bbl mud system w/ 5 x 6 x 11 mix pump p/b 471 NA Detroit diesel premix, 8’W x 7’H x 10’L covered porch.  (1) Kohler Model 100REOZLC 88kw capacity p/b John Deere diesel engine, 200 bbl water tank, 1300 gal fuel tank, doghouse and change house, all mounted on 42’ tandem axle trailer.  Gardner Denver FXN 7 x 14” mud pump with 5-1/2” liners, quick change valve caps, powered by 3406C Cat (425 hp), skidded with metal roof, tarp sides.  (23) 4-1/2” drill string, slick collar HD90 box and pin, 200 jts 6,000’ 4” full hole.

In early 2015 rig drilled 40 holes to depth of 4,500’.  Rotary table, blocks and mud pump have all been refurbished since project completion.    Price:  $345,000

GARDNER DENVER 2500(Ref#10420T)  Manufactured 1980"s, trailer mounted, 6-part line with 3-sheave travelling block, 6" Howard Turner RC swivel, 37" kelly, 18" Gardner Denver table, International DT466 diesel engine, no mud, 55" derrick, runs 30" drill pipe, currently drilling  Price:  $265,000

GARDNER DENVER 2500(Ref#8780N)   Manufactured in 1989, 18" Gardner Denver RT-18 rotary table, single drum drawworks with 100,000 LBS # capacity with 6 lines, SSW 75 Gardner Denver swivel, 4 ¼" X 40" Kelly, kelly bushing, 60 ton Gardner Denver Block/hook, Gardner Denver Sand Reel, Parmac Hydromatic Brake, Martin Decker weight indicator, 4 hydraulic leveling jacks, mounted on 3 axle trailer, Detroit Series 60 diesel engine, single section mast 98" x 150,000#, 2 Foster catheads, 2 brake tongs with hydraulic jack ,Mud Cleaning System, Mud tank 2 centrifugal pumps , 1 Liner shale shaker and 6 con desanders, Trash pump , Gardner Denver FY-FXZ 7 1/4" X 12" Mud Pump skided Mounted powered by detrot diesel serial 60, located Mexico  Price on Request

GARDNER DENVER 2000 (Modified, 2800" capacity)(Ref#10286Tb)  Manufactured 1980, 3 drum Heavy Duty drawworks (freshly overhauled), hydro brake, set up with elevators and compression slips, hydraulic pulldown, 54" HD square derrick, 6 line blocks 5/8" cable, 4-1/2" x 37" square kelly, roller kelly bushing, mounted on Western Star Tandem axle truck, 4 leveling jacks, on deck Gardner Denver FXX 7-1/2" x 8" mud pump chain drive gear end (freshly overhauled), 18" Gardner Denver rotary table, full set of tongs, weight indicator, side catwalks, spinning chain  PRICE:  $250,000

GARDNER DENVER 2000(Ref#4906R) Manufactured early 1980"s, triple drum with sandline, rebuilt drawworks, recent rebuild on engine, trailer mounted with twin Detroit 471 turbo engines, 56" mast, 100,000# pullback, 7 x 10 GD mud pump, 35" x 4-1/2" square Kelly, 18" Howard Turner rotary table, cathead, no pulldown, air clutches, spinning chain, racking board, 4 hydraulic leveling jacks PRICE: $250,000

GARDNER DENVER 2000(Ref#7672T)  Manufactured 1978, beefed up with bigger kelly and swivel, has drilled to 2700", mounted on Crane Carrier with Detroit 8V71 engine  PRICE: $320,000

GARDNER DENVER 2000(Ref#7109T)  Manufactured 1978, 5-1/2 x 10 Gardner Denver mud pump, cathead, chain pulldown, 56" mast, 10" table, mounted on 4 axle Crane Carrier, Cummins 400 engine  Price:  $200,000

GARDNER DENVER 2000(Ref#10705Tb)  Manufactured late 1970"s, completely rebuilt 2008, 58" x 100,000# mast, manual brakes with capacity of six part line both drums, 7-1/2 x 10" Gardner Denver mud pump, 4-1/2" x 38" kelly, 10" retractable table, 3 leveling jacks, mounted on 4 axle Crane Carrier with 350 Cummins PTO engine, complete rebuild including new mud pump gear end, major renovations on carrier, up to 3000" depth capacity  Price:  $195,000

GARDNER DENVER 2000(Ref#12877Ra)  Manufactured 1977, 6 x 6 Wheatly mud pump, LeRoi 500 cfm compressor, DSM 8-1/2" stationery table, 120 Diamond chain pulldown, mounted on Peterbilt truck with newly rebuilt Cummins 400 engine, was owned by government (not a lot of wear and tear)  Price on Request

GARDNER DENVER 2000(Ref#580Na)  Manufactured 1976, 7-1/2 x 10 FXO mud pump (rebuilt), 3 x 4 Mission charge pump with motor and hydraulic cooler (low hours), mounted on 1976 Crane Carrier with 400 Cummins, PTO (completely rebuilt), air clutches, hydraulic pulldown, 10” Gardner Denver retractable table, 9 speed rotary transmission, hydraulic spinners, 56’ derrick  PRICE:  $237,500

GARDNER DENVER 2000(Ref#8733N) Manufactured in 1980 , Gardner Denver FY-FXD 7-1/2 x 10" mud pump, 18" Gardner Denver RT-18 rotary table, double drum drawworks 45,000# capacity with 6 lines, sand reel , 4 Hydraulic leveling jacks, 58" x 66,000# capacity mast,2 Caterpillar engine, SW 75 Ton Gardner Denver Swivel, 2 Traveling blocks, 40" Kelly, kelly bushing, air clutches, Parmac Hydromatic brake, 2 brake tongs with hydraulic jack, trailer mounted on a 2 axle located Mexico Price on Request

GARDNER DENVER(Ref#14020T)  Manufactured 1968, trailer mounted, winch drive, no mud pump, 22-1/2" rotary table, 55" derrick, 1200" of 6" drill stem  Price:  $270,000

GARDNER DENVER 1700(Ref#7551R)  Manufactured 1980, hydraulic bailing drum, 5-1/2 x 8 Gardner Denver mud pump with new fluid end, new pump clutch, new rotary clutch, chain pulldown, 10" rotary table, mounted on 2002 Western Star, 10 speed transmission, pipe rack, air clutches, new 2" Little Giant swivel, new 4" x 24" fluted kelly, 44" derrick with flanges for extension, can easily be rigged up for reverse circulation    PRICE:  $225,000

GARDNER DENVER 15W DRILL RIG(Ref#1375T)  Manufactured 1976, 750/250 air compressor, 10” retractable rotary table, Little Giant swivel, mounted on 4 axle Crane Carrier, 400 Big Cam engine (5000 hours), 1000’ of 3-1/2” x 20’ drill pipe (fits on rig)  Price: $117,500

GARDNER DENVER 15W(Ref#13200R) upgraded with larger drawworks (has been to 2000"), 6 lines, mounted on 4 axle CCC with N14 Cummins, 18" Howard Turner stationary table, 5" hex Kelly, folding catwalks, racking board, (2) 6x10 pumps, 3" Mission pump, air clutches, hydraulic pulldown, 4 hydraulic leveling jacks   Price rig only:  $200,000

GARDNER DENVER 15W(Ref#10468T)  Manufactured 1977, Cummins 400 Big Cam 3 engine (less than 300 hours since in frame), 5-1/2 x 8 Gardner Denver mud pump, Gardner Denver WEJ 750/250 air compressor with blower, 52" x 100,000# 4-line derrick, 2500" racking board, hydraulic power tongs range 2-3/8 – 4-1/2, mounted on 4 axle Crane Carrier, 4 cylinder Bean mist pump, hydraulic hydramatic trip hold back, hydraulic kelly hold back, 4-1/2" square kelly with kelly cock, 10" Gardner Denver rotary table, swabbing drum with 2000" cable.

GARDNER DENVER 15W(Ref#2521T) Manufactured 1974, complete rebuild, 5 x 8 high pressure mud pump, 54" derrick, 7-1/2" retractable rotary table (rebuilt 2018), Cummins 290 on deck, kelly bushing has been replaced, 290 Cummins deck engine, air clutches, wet clutch on main drive replaced, no air compressor, mounted on 4 axle Crane Carrier with 315 Cummins engine, 10 speed transmission, new clutch, tires 90%.  Includes 340" of 4-1/2" x 20" drill pipe, 6" stabilizer, 5" stabilizer, new tires (90%), brakes, clutches and bearings have beenreplaced  Price:  $215,000

GARDNER DENVER 15W(Ref#5095N) modified to GD 2000, set up for deephole drilling, manufactured 1974, mounted on 4 axle crane carrier with 400 Big Cam Cummins engine, 4 line drawworks, 4-1/2" x 24" Kelly, hydraulic pulldown, air clutches, 85000# hook load modified king swivel, 1000" of 3-1/2" IF x 20" drill pipe  Price:  $320,000

GARDNER DENVER 15W(Ref#15009Ta)  Manufactured 1977, mounted on 1977 Autocar NTC 400 Big Cam 3 engine, 5-1/2 x 10" Gardner Denver mud pump, 256S2 Leroi air compressor, 44M drawworks 8-1/2" DSM rotary table, 342" mast with extension and racking board, pipe slide, 5 leveling jacks, Bean injection pump  Price:  $169,500

GARDNER DENVER 15W(Ref#8645RB) Manufactured 1978, PTO, mounted on CCC with diesel engine, (2) 5 x 8 mud pumps, 3 x 4 Mission mud pump, 10" retractable rotary table, 4" fluted Kelly, no air, 4 hydraulic leveling jacks, no pipe available   PRICE:  $165,000

GARDNER DENVER 15W(Ref#10133R)  Manufactured 1978, 52" mast, 4" x 31" kelly, 10" retractable table, 700/200 piston air compressor, 5 x 10 Gardner Denver mud pump, hydraulic chain pulldown, mounted on 3-axle Crane Carrier, 3 leveling jacks,  Price:  $265,000

GARDNER DENVER 15W(Ref#15089R)  Manufactured 1978, 5-1/2 x 10 Gardner Denver mud pump, no air compressor, 10" retractable table, 4-1/2" x 24" kelly (smaller kelly available), mounted on 1977 Autocar with 350 Cummins engine, PTO, air clutches, 58" extended mast, racking boards, pipe rack, breakout tongs, chain pulldown, 5 hydraulic leveling jacks Price:  $165,000

GARDNER DENVER 15W(Ref#4383Ta)  Manufactured 1974, Gardner Denver 5-1/2 x 10 mud pump, 10" retractble rotary talbe, 53" mast, Giant swivel, mounted on 4 axle Crane Carrier with 350 Cummins engine, 3 hyd leeling jacks, air clutches  Price on Request

GARDNER DENVER 15W(Ref#4383Tb)  Manufactured 1970, Gardner Denver 5-1/2 x 10 mud pump, 10" retractble rotary talbe, 53" mast, Giant swivel, mounted on 4 axle Crane Carrier with 350 Cummins engine, 3 hyd leeling jacks, air clutches  Price on Request

GARDNER DENVER 15W(Ref#13405R) Two available, manufactured 1972 and 1973, mounted on CCC (twin steer) with rebuilt Detroit 8V92 engine, 600/300 air compressor, no mud, 7-1/2" retractable table, hydraulically driven Ramsey winch, 4" x 25" Kelly, breakout wrench, air clutches, pipe rack, 200" of 4" x 20" drill pipe, 3 hydraulic leveling jacks, sitting 3 years, running when parked  Price$43,500 each OBO

GARDNER DENVER 14W DRILL RIG(Ref#13060Ra)  Manufactured 1973, 650/250 air compressor, Gardner Denver 5 x 6 mud pump, air clutches, 10” retractable table, 40’ mast,  4-1/2” x 25’ kelly, mounted on tandem axle Crane Carrier with 375 hp Cummins engine, 13 speed transmission, 3 leveling jacks, rod box, pipe racking stand, 210’ of 4-1/2” x 15’ drill pipe, running condition, does 65 mph Price:  $74,500

GARDNER DENVER 14W(Ref#13581R)  Manufactured 1973, triple drum drawworks (bailing), WEJ 600/250 air compressor Gardner Denver FXG 5 x 6 mud pump, 38" derrick, Bean injection pump, GD 10" retractable rotary table, hydraulic pulldown, 4-1/4" round fluted kelly with 2" swivel, mounted on Crane Carrier p/b Cummins 400 BC with Jake brake, 13 speed fully transmission, 3 hydraulic leveling jacks, (30) jts of 3-1/2" x 20" (2-7/8) drill pipe,  Price:  $157,500

GARDNER DENVER 14W(Ref#2218Ta)  Manufactured 1972, 5 x 10 Gardner Denver mud pump, 7-1/2" retractable table, 4-1/2" x 20" kelly, no rod box, no pipe included  Price:  $100,000

GARDNER DENVER 1500(Ref#1323T)  extended derrick, Gaso 6-1/2 x 10 pump, pulldowns, new 10" retractable table, air compressor, mounted on 1985 Peterbilt 359 truck with Cat 3406 engine, pipe rack, 1800" drill pipe, diverter, pipe spinners, pipe truck, water truck  Price:  $350,000

GARDNER DENVER 1500(Ref#13686T)  Manufactured 1974, mounted on 4 qaxle Crane Carrier, 300 hp Cummins engine, 5-1/2 x 8 Gardner Denver mud pump, 750/300 air compressor, 58" extended mast, 10" retractable table, chain pulldown, 800" drill pipe, ready to work  Price:  $160,000

GARDNER DENVER 1500HD(Ref#4198RA) Manufactured 1975, double drum, refurbished, air compressor (PTO), 5-1/2 x 8 mud pump, mounted on 1975 International with 6 cyl Detroit diesel engine, 38"9" derrick, 3 lines to hook, 3" swivel (reduced to 2" mud hose), 3-1/2" fluted kelly, 5-1/2" stationary table, pipe rack, no pipe available  Price:  $125,000

GARDNER DENVER 1500(Ref#1242R) Manufactured mid 1970"s, brand new derrick & racking board, PTO, mounted on Autocar with 400 Cummins engine, 5 x 6 mud pump, no air, 7" retractable table, 3 ¾" x 25" Kelly, 48" mast, air clutches, hydraulic pulldown, breakout tongs, 3 hydraulic leveling jacks, no pipe available  Price:  $90,000

MAYHEW 1500 DRILL RIG(Ref#4075Ta)  Gardner Denver 5 x 6 mud pump, air compressor, 4” kelly, rotary table, no pulldown, mechanical clutches, mounted on Peterbilt truck with diesel engine, runs 3” drill rod, running condition  Price:  $92,500

MAYHEW 1500(Ref#15697T)  Detroit 671 diesel deck engine, no mud, no air compressor, retractable table, 26’ square Kelly (can run 33’ casing), mounted on 1981 GMC Brigadier with Cat 3208 engine, pipe racks (holds approx. 500’), hydraulic breakout, hydraulic pulldown, air clutches, 3 leveling jacks, 900’ drill pipe, 22’ 3-axle trailer, (2) 4-1/2” x 20’ drill collars, (1) 5-1/2” x 30’ drill collar, misc change overs and pick up plugs  Price:$54,500

GARDNER DENVER 1500(Ref#1814Ta)  5 x 8 mud pump, stationary table, 4"  kelly, mounted on 1979 International truck with diesel engine, PTO, pipe racks, 4 hyd leveling jacks, 17 jts drill pipe, needs new gearbox  Price:  $62,500

GARDNER DENVER 1400(Ref#14364R) Manufactured 1979, PTO, mounted on 1979 Ford truck, 34" mast, 7-1/2" retractable table, 23" kelly, chain pulldown, air drawworks  PRICE:  $74,500

GARDNER DENVER 1400(Ref#15009Tb)  Manufactured 1978, mounted on 1978 Peterbilt 353-S truck, NTC 400 Big Cam 3 engine, 5-1/2 x 8" Gardner Denver mud pump, 256S2 Leroi air compressor, 1400 drawworks, 7-1/2" GD rotary table, 32" mast with extension and racking board, pipe slide, 4 levelng jacks, Bean injection pump, electric retarder  Price:  $199,500

GARDNER DENVER 1400(Ref#1338Ta)  Manufactured 1977, 5 x 6 mud pump, 350 cfm air compressor (spare parts for compressor), 14" retractable table, 4-1/2" x 23" kelly, 38" mast, 3 hyd leveling jacks, mounted on Crane Carrier with 350 Cummins engine

SEISMIC RIG(Ref#7391N)  580/50 Gardner Denver air compressor, 5 x 6 Whealey pump,  mounted on 1980 GMC truck with 671 Detroit diesel engine, PTO, 500" drill pipe  Price:  $85,000

GARDNER DENVER 1250(Ref#10460T)  5-1/2 x 8 Gardner Denver mud pump, 1500 drawworks, 7-1/2" stationery rotary table, mounted on 1997 International truck with L10 Cummins, 300" pipe  Price:  $65,000

GARDNER DENVER 1000 MUD ROTARY DRILL RIG(Ref# 7185T)  Built 1976, one owner rig, 5 x 6 Gardner Denver mud pump, 427 CFM piston air compressor, retractable rotary table

MAYHEW/GARDNER DENVER 1000 MODIFIED(Ref#2945T)  Mounted on Peterbilt 340 double frame carrier, 5 x 6 mud pump (fluid and mechanical ends rebuilt), 380’ drill pipe, 8” and 10” drill bits  Price:  $235,000

GARDNER DENVER MUD ROTARY RIG(Ref#3747Tb)  900/350 air compressor, no mud pump, Chicago Pneumatic mast, mounted on tri axle International, needs minor work   Price:  $112,500

MAYHEW DRILLING RIG(Ref#2349T)  Gardner Denver 5 x 6 mud pump, big air compressor, retractable table, mounted on 1991 International 4800 truck with diesel engine, approx. 193,000 miles  Price:  $110,000

MAYHEW 1000(Ref#15735Ta)  Manufactured 1958, mounted on 1999 Sterling 60 Series Detroit engine, 5 x 6 Gardner Denver mud pump, 7-1/2" stationary table, 33" kelly, 35" mast, 2 rear and 1 front leveling jacks, 140" of 2-3/8" drill pipe, ready to work  Price:  $57,500

MAYHEW 1000 DRILL RIG(Ref#4401Ta)  Gardner Denver mud pump, stationary table, 2-7/8" kelly, mounted on 1977 International truck, approx. 300’ 2-7/8" drill pipe, 7-7/8" & 9-1/4" bits, running condition  Price:$62,500

MAYHEW 1000(Ref#15087Ta)  Manufactured 1957, 5 x 6 Gardner Denver mud pump (new gear end and fluid end), 7-1/2” retractable table, 24’ kelly, 35’ mast, chain pulldown with hydraulic motor, mounted on 1973 Diamond Reo double frame, 290 Cummins engine, 8 speed transmission, engine and transmission new, 2 rear and 1 front leveling jacks, 300’ of 2-3/8” drill pipe, mud pan, 2 bits, ready to work, new cables,   Price:  $62,500

MAYHEW 1000(Ref#8472T)  Set up for drilling and workover, 4” square kelly, stationary table, mounted on 1974 International Lodestar, 5 x 6 Gardner Denver mud pump, no rod box, breakout tongs,  400’ of 2-3/8” x 20’ drill pipe, 10” surface bit, (2) 4” drill collars, 11 new button bits, 3 axle pipe trailer   Price:  $44,500

MAYHEW DSM 1000 DRILL RIG(Ref#5483T)  Completely refurbished 2010, derrick needs a little work, Mission Magnum Sandmaster 4 x 3 x 13 mud rotary pump, mounted on 1998 Mack CH613, completely with 2-3/8 pipe and various bits  Price:  $167,500

MAYHEW 1000(Ref#11322T)  Mounted on 1994 Ford truck, Cat engine, 7-1/2" table, 5 x 6 Gardner Denver mud pump, 23" kelly, 2" swivel, hydraulic pulldown, water injection pump, 3 leveling jacks  Price:  $60,000

MAYHEW 1000(Ref#6990Ra)  Mounted on 1997 Peterbilt 357 truck, PTO, 5 x 7 mud pump, 500" of 2-7/8IF drill pipe, 600" of 1-1/4" developing pipe, 4 jacks, (4) rock bits, (4) casing elevators, 175 air compressor, miscellaneous tools  Price:  $140,000

MAYHEW 1000(Ref#3870R)  air compressor, 5 x 6 mud pump, 23" kelly, 7-1/2" rotary table, mounted on 1996 International truck with Cummins 350 hp engine, 300" of 2-7/8" OD with 2-3/8 IF drill pipe, air clutches PRICE:  $79,500

MAYHEW 1000(Ref#5199R)  5 x 6 Garnder Denver mud pump, Gardner Denver air compressor, 5-1/4" stationary rotary table, mounted on 1997 Ford L9000 truck with Cummins 350 hp diesel engine, chain pulldown, 23" kelly, new brakes, new drums, new kelly bushings  Price:  $75,000

MAYHEW 1000(Ref#891Ta)  Manufactured 1978, 5 x 6 Gardner Denver mud pump, Gardner Denver air compressor, 5-1/4" stationary table, mounted on 1997 International truck with Cummins engine, 10 speed transmission, 30" mast, 25" kelly, chain pulldown, 2 rear leveling jacks, 300" of 2-7/8" IF drill pipe  Price:  $79,500

MAYHEW 1000(Ref#891Tb)  5 x 6 Gardner Denver mud pump, IR air compressor, 7-1/2" Mayhew rotary table, 30" mast, 25" kelly, chain pulldown, air clutch, mounted on 1996 Ford LT9000 truck with Cummins engine, 2 rear jacks, 300" drill pipe  Price:  $89,500

MAYHEW 1000(Ref#11597R) Manufactured 1970, only 200 hours since in-frame overhaul, mounted on 1970 GMC with 671 Detroit engine, 5x6 GD mud pump, GD 580 air compressor, 18" kelly, hydraulic pulldown, mechanical clutches, breakout tongs, pipe rack, 1 front screw jack & 2 rear hydraulic leveling jacks, 150" of 2 7/8"IF x 15" drill pipe  Price:  $47,500

GARDNER DENVER 1000HD(Ref#15652T)  Manufactured 1979, 5 x 6 Failing mud pump, Leroi developmental air compressor, 23" fluted kelly, 7-1/2" retractable Speedstar table, hydraulic pulldown, air over hydraulic clutches, pipe rack, breakout wrench, mounted on International truck with DT466 engine, 3 hyd jacks, 300" of 20" pipe

GARDNER DENVER 1000(Ref#13496T)  Manufactured 1979, 5 x 6 mud pump, 200 cfm air compressor, 5-1/2" retractable table, 3-3/4" x 23" fluted kelly, hydraulic pulldown, mechanical clutches, pipe rack, pipe wrench, mounted on 1979 Ford 9000 ruck with 6V92 Detroit engine, 4 hyd jacks, drills daily  Price:  $112,500

GARDNER DENVER 1000(Ref#6444T)  Mounted on 1998 International truck with 466 diesel engine, 5 x 6 mud pump, 350 air compressor, stationary table, hydraulic pulldown,  450’ drill pipe, bits, subs, collars, working daily  Price:$212,500

MAYHEW 1000(Ref#1993R) Manufactured mid 1960"s, PTO, mounted on 1977 GMC 6500 with 366 gas engine, 5x6 GD mud pump, no air, 3" Kelly, 5-1/4" stationary table, hydraulic pulldown, mechanical clutches  Price on request

MAYHEW 1000(Ref#8497RA) completely refurbished, extended mast (28+") mounted on 1972 Ford with gas engine, 23" x 3" square Kelly, 5-1/4" stationary table, 3x4 centrrifugal mud pump, mechanical clutches, mechanical chain pulldown, rebuilt hydraulic cylinders, mud pan, rod box, 1 front & 2 rear hydraulic leveling jacks, fully tooled PRICE:  $52,500

MAYHEW 1000(Ref#316R)  Manufactured 1973, Midway 1300 drawworks, 2000 GD rotary table, 2" Little Giant swivel, 5 x 6 GD mud pump, chain pulldown, mounted on Fleetstar truck with V8 459 engine, 2 rear hydraulic leveling jacks, 29.5"L x 8.5"W x 10/5"H  27,000 lbs.  Price:  $65,000

GARDNER DENVER 1000(Ref#3178N)  top drive head, no mud, 600/125 air compressor, (table drive missing), mounted on 1983 Mack truck with 6V71 Detroit diesel, 4 jacks  Price:  $50,000

MAYHEW 1000(Ref#14011R) Manufactured mid 1970"s, mounted on 1984 International S1900 with DT466 engine, 13 speed, GD 5x6 mud pump (new chrome liners, pistons, rods, not used since re-done), 20" fluted kelly, 7 ¼" stationary table, GD developmental air compressor (needs work), mechanical pulldown 3 speed/reverse, pull down chains like new, water injection, pipe tub slide, 3 leveling jacks, breakout wrench, pipe tub slide, 80" of new 2 3/8" x 20" drill pipe and 300" used, drill collars, slips, some tools, ready to go, stored inside  PRICE:  $65,000

GARDNER DENVER 1000(Ref#9069R) mounted on 1960"s-70"s Mack with diesel engine, 5 x 6 mud pump, 100-SI Gardner Denver air compressor, Bean pump, 2 7/8" x 20" kelly, (kelly needs to be remounted), 7-1/2" retractable table, Planetary pulldown, mechanical clutches, breakout wrench, pipe rack, 2 rear hydraulic leveling jacks, 300" of 2 7/8" x 20" drill pipe, rig is apart, some rebuilding has been done  PRICE:  $57,500

GARDNER DENVER 1000(Ref#9505R) mounted on Mack truck, 5 x 6 mud pump, air compressor, 7-1/2" rotary table, rod rack, 3 leveling jacks  Price:  $50,000

MAYHEW 1000(Ref#10021N) mounted on Rio 6x6 with Cat 3306 rebu