mud pump blows all 3 swabs price

Mud pump is one of the most critical equipment on the rig; therefore personnel on the rig must have good understanding about it. We’ve tried to find the good training about it but it is very difficult to find until we’ve seen this VDO training and it is a fantastic VDO training about the basic of mud pumps used in the oilfield. Total length of this VDO is about thirteen minutes and it is worth to watch it. You will learn about it so quickly. Additionally, we also add the full detailed transcripts which will acceleate the learning curve of learners.

Powerful mud pumps pick up mud from the suction tank and circulate the mud down hole, out the bit and back to the surface. Although rigs usually have two mud pumps and sometimes three or four, normally they use only one at a time. The others are mainly used as backup just in case one fails. Sometimes however the rig crew may compound the pumps, that is, they may use three or four pumps at the same time to move large volumes of mud when required.

Rigs use one of two types of mud pumps, Triplex pumps or Duplex pumps. Triplex pumps have three pistons that move back-and-forth in liners. Duplex pumps have two pistons move back and forth in liners.

Triplex pumps have many advantages they weight 30% less than a duplex of equal horsepower or kilowatts. The lighter weight parts are easier to handle and therefore easier to maintain. The other advantages include;

• One of the more important advantages of triplex over duplex pumps, is that they can move large volumes of mud at the higher pressure is required for modern deep hole drilling.

Triplex pumps are gradually phasing out duplex units. In a triplex pump, the pistons discharge mud only when they move forward in the liner. Then, when they moved back they draw in mud on the same side of the piston. Because of this, they are also called “single acting.” Single acting triplex pumps, pump mud at a relatively high speeds. Input horsepower ranges from 220 to 2200 or 164 to 1641 kW. Large pumps can pump over 1100 gallons per minute, over 4000 L per minute. Some big pumps have a maximum rated pressure of over 7000 psi over 50,000 kPa with 5 inch/127 mm liners.

Here is a schematic of a triplex pump. It has three pistons each moving in its own liner. It also has three intake valves and three discharge valves. It also has a pulsation dampener in the discharge line.

Look at the piston at left, it has just completed pushing mud out of the liner through the open discharge valve. The piston is at its maximum point of forward travel. The other two pistons are at other positions in their travel and are also pumping mud. But for now, concentrate on the left one to understand how the pump works. The left piston has completed its backstroke drawing in mud through the open intake valve. As the piston moved back it instead of the intake valve off its seat and drew mud in. A strong spring holds the discharge above closed. The left piston has moved forward pushing mud through the now open discharge valve. A strong spring holds the intake valve closed. They left piston has completed its forward stroke they form the length of the liner completely discharging the mud from it. All three pistons work together to keep a continuous flow of mud coming into and out of the pump.

Crewmembers can change the liners and pistons. Not only can they replace worn out ones, they can also install different sizes. Generally they use large liners and pistons when the pump needs to move large volumes of mud at relatively low pressure. They use a small liners and pistons when the pump needs to move smaller volumes of mud at a relatively high pressure.

In a duplex pump, pistons discharge mud on one side of the piston and at the same time, take in mud on the other side. Notice the top piston and the liner. As the piston moves forward, it discharges mud on one side as it draws in mud on the other then as it moves back, it discharges mud on the other side and draws in mud on the side it at had earlier discharge it. Duplex pumps are therefore double acting.

Double acting pumps move more mud on a single stroke than a triplex. However, because of they are double acting they have a seal around the piston rod. This seal keeps them from moving as fast as a triplex. Input horsepower ranges from 190 to 1790 hp or from 142 to 1335 kW. The largest pumps maximum rated working pressure is about 5000 psi, almost 35,000 kPa with 6 inch/152 mm linings.

A mud pump has a fluid end, our end and intake and the discharge valves. The fluid end of the pump contains the pistons with liners which take in or discharge the fluid or mud. The pump pistons draw in mud through the intake valves and push mud out through the discharge valves.

The power end houses the large crankshaft and gear assembly that moves the piston assemblies on the fluid end. Pumps are powered by a pump motor. Large modern diesel/electric rigs use powerful electric motors to drive the pump. Mechanical rigs use chain drives or power bands (belts) from the rig’s engines and compounds to drive the pump.

A pulsation dampener connected to the pump’s discharge line smooths out surges created by the pistons as they discharge mud. This is a standard bladder type dampener. The bladder and the dampener body, separates pressurized nitrogen gas above from mud below. The bladder is made from synthetic rubber and is flexible. When mud discharge pressure presses against the bottom of the bladder, nitrogen pressure above the bladder resists it. This resistance smoothes out the surges of mud leaving the pump.

Here is the latest type of pulsation dampener, it does not have a bladder. It is a sphere about 4 feet or 1.2 m in diameter. It is built into the mud pump’s discharge line. The large chamber is form of mud. It has no moving parts so it does not need maintenance. The mud in the large volume sphere, absorbs this surges of mud leaving the pump.

A suction dampener smooths out the flow of mud entering into the pump. Crewmembers mount it on the triplex mud pump’s suction line. Inside the steel chamber is a air charged rubber bladder or diaphragm. The crew charges of the bladder about 10 to 15 psi/50 to 100 kPa. The suction dampener absorbs surges in the mud pump’s suction line caused by the fast-moving pump pistons. The pistons, constantly starts and stops the mud’s flow through the pump. At the other end of the charging line a suction pumps sends a smooth flow of mud to the pump’s intake. When the smooth flow meets the surging flow, the impact is absorbed by the dampener.

Workers always install a discharge pressure relief valve. They install it on the pump’s discharge side in or near the discharge line. If for some reason too much pressure builds up in the discharge line, perhaps the drill bit or annulus gets plugged, the relief valve opens. That opened above protects the mud pump and system damage from over pressure.

Some rig owners install a suction line relief valve. They install it on top of the suction line near the suction dampener. They mount it on top so that it won’t clog up with mud when the system is shut down. A suction relief valve protects the charging pump and the suction line dampener. A suction relief valve usually has a 2 inch or 50 mm seat opening. The installer normally adjusts it to 70 psi or 500 kPa relieving pressure. If both the suction and the discharged valves failed on the same side of the pump, high back flow or a pressure surge would occur. The high backflow could damage the charging pump or the suction line dampener. The discharge line is a high-pressure line through which the pump moves mud. From the discharge line, the mud goes through the stand pipe and rotary hose to the drill string equipment.

“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.

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 rebuilt engine, Fuller 10 speed transmission, Gardner Denver 5 x 6 mud pump, Leroi 100s air compressor, 2000 stationary table, 3-1/2" x 23" Kelly, water injection pump, 500 gallon water tank, hydraulic pulldown, mechanical clutches, breakout wrench, 2 rear hydraulic leveling jacks, 200 of 2 7/8" x 20" drill pipe Price: $55,000

MAYHEW 1000(Ref#14358RA) Manufactured 1976, PTO, mounted on 1988 Chevy with diesel engine, 5 ¼" stationary table, 2 7/8" x 23" kelly, breakout tongs, 5 x 6 mud pump, no air, hydraulic pulldown, mechanical clutches, sandline, rod box, new tires & paint, 240" of 2 7/8" pipe  PRICE:  $57,500

MAYHEW 1000(Ref#289R) PTO, mounted on 1980 International 1800 tandem axle truck with new 404 gas engine, 5 ¼" stationary table, Gardner Denver 5x6 mud pump, chain pulldown, hydraulic bailing line mounted on mast, mechanical clutches, mechanical pullback, 300" of 15" x 2 3/8" drill pipe  Price, rig only:  $40,000

MAYHEW 1000(Ref#1001N) PTO, mounted on 1986 GMC Brigadier with Detroit 6V92 engine, 6x6 Wheatley mud pump, hydraulic pulldown, mechanical clutches, 7-1/2" stationary table, 3" fluted Kelly, toolbox, pipe rack, 2 rear hydraulic leveling jacks, has some hydraulic leaks, extra spare parts for pump, no pipe or tools available PRICE:  $37,500

MAYHEW 1000(Ref#9449N) late 1960"s-early 1970"s rig, Total rebuild on rig 2008, has drilled 15-20 shallow wells since rebuild,  PTO, mounted on 2000 International 4900 with DT466 engine, 5 x 6 mud pump, on board 400/250 air compressor, mechanical clutches, pulldown, 5 ¼" stationary table, 3-1/2" x 18" fluted Kelly, no breakout wrench, stored inside, new tires, 400" of 2 3/8" x 15" drill pipe    PRICE:  $79,500

MAYHEW 1000(Ref#2962N)  Manufactured 1980, mounted on 1980 Ford 8000 truck with Cat 3208 diesel engine, 5 x 6 Gardner Denver mud pump, 315 LeRoi compressor, 23" kelly, large boom, 2 rear jacks, rod racks, Little giant swivel, 100" of 2-3/8 IF Rod  Price:  $55,000

MAYHEW 1000(Ref#2362N) PTO, mounted on 1971 White Constructor with 290 Cummins engine, 6 x 6 Wheatley mud pump, 580 CFM air compressor, custom made 42" mast, 36" Kelly, stationary table, mechanical clutches, pulldown, 1 front 2 rear hydraulic leveling jacks, no breakout wrench, no pipe or tools available  Price:  $42,500

MAYHEW 1000(Ref#4915N)  Manufactured 969, mounted on 1990 International truck, 300 Cummins engine, rig runs off Brownie box (no transfer case), 650/50 air compressor, 5 x 6 mud pump, mechanical pulldown, needs minor work (bearing in mud pump and pulldown transmission)  Price:  $52,500

MAYHEW 1000(Ref#15190N)  5 X 6 Wheatley mud pump, mounted on 1975 Ford 8000 truck, 225 hp Cat 3208 diesel engine, PTO, 10.00 x 20 new tires, 3-5/16" x 23" kelly, 2" Little Giant swivel, 5-1/4" non-retractable table, 3 part line, new-1/2" 19x7 wire rop, (2) new brakes on drawworks, 4 hydraulic jacks, hydraulic pulldown, 2 lockable tool boxes, new flud end on mud pump, steel mud pan, crown sheaves recently rebushed, rod box, 200" of 3-1/2" x 20" (2-3/8 IF) drill pipe, new paint currently drilling  Price:$70,000

MAYHEW 1000(ref#15185N)  mounted on 1980"s Freightliner truck with Cummins engine, PTO, chain pulldown, mechanical clutches, 2 rear hydraulic leveling jacks, 5-1/4" stationary table, 2 new rims for derrick and leveling jacks, gear box recently redone, mud pump removed, no pipe, running condition  Price:  $35,000

MAYHEW 1000(Ref#1853Na)  Mounted on Ford L9000 tandem axle truck with 671 Detroit diesel engine, PTO, 23" kelly and kelly bushing.  5 x 6 Gardner Denver duplex mud pump, mechanical clutches, pulldown, no turntable,  200" drill pipe  Price:$45,000

MAYHEW 1000(Ref#1853Nb)  Mounted on Ford L9000 tandem axle truck with 671 Detroit diesel, PTO, 4 x 3 centrifugal mud pump, 23" kelly and kelly bushing, mechanical clutches, pulldown, 200" drill pipe  Price:  $65,000

MAYHEW 1000(ref#9000N)  mounted on 1994 tandem axle Ford L9000 truck, 600/250 WAJ air compressor, LT10 Cummins (290 hp), 5 x 6 Gardner Denver mud pump, 5 speed rotary table, 360" drill pipe, new kelly, swivel, 5-1/2" stationary table, 2-7/8" x 23" kelly, Little Giant swivel, mechanical clutches, hydraulic pulldown, 2-7/8 FEDP x 20" pipe, breakout tongs, bankd new PTO,   Price:  $105,000

MAYHEW 1000 COMBINATION RIG(Ref#1790Na) Manufactured 1970, PTO, mounted on 1970 Chevy with gas engine, 5 x 6 Gardner Denver mud pump, 185 CFM on board air compressor with John Deere diesel engine, spudding arm, 5 ¼" stationary table, hydraulic pulldown, 3 hydraulic leveling jacks, 23" Kelly, 210" of 2 3/8" x 15" drill pipe, stabilizer    PRICE ON REQUEST

GARDNER DENVER 1000(Ref#8303Na)  Manufactured 1970"s, mounted on Paystar 5000 tandem axle truck, 3208 Cat engine, self-dump mud pit, 3rd drum, 500 gal water tank, 5 x 6 mud pump, 250" of 2-3/8" Mayhew Jr pipe, 3 leveling jacks, 5-3/4" table    Price:$40,000

MAYHEW 1000(Ref#1551N)  mounted on 1963 Army 6x6 truck with gas engine, (no brakes, needs batteries) 4-1/2 x 5 mud pump, stationary table, mechanical clutches, hydraulic pulldown, breakout wrench, stabilizer, bits, subs, etc., fully tooled, 3 hydraulic levleing jacks, 450" Mayhew Jr drill pipe, stabilizer, 7-7/8" bit, paddle bit, 25"L x 8"W x 10"4"H, 27,000#      PRICE:  29,500

MAYHEW 1000(Ref#3993N)  5 x 6 mud pump, developmental air (needs work), mounted on 1967 Ford tandem axle gas engine (needs motor), PTO, 200" pipe  Price:  $50,000

MAYHEW 1000(Ref#2081N)  5 x 6 Gardner Denver mud pump, 3RD drum, mounted on 1967 International truck w/345 gas engine, 300" of 2-3/8" x 15" drill pipe, bits, subs, drill collar, good condition  Price:  $45,000

GARDNER DENVER 1000(Ref#1186N)  Manufactured 1979, Gardner Denver ADL 100/250 air compressor, 8" rebuilt rotary table, 3" x 24" fluted kelly hydraulic pulldown , mounted on 1978 Ford F8000 tandem axle truck with Cat 3208 engine, 120" of 3" x 20" pipe, subs,  Price:  $50,000

MAYHEW 1000(Ref#6211N)  Manufactured 1974, 3 x 4 centrifugal mud pump, mounted on 2001 International truck, International Cat engine, PTO, 6 speed, air brakes, 700" of pipe, 30" twoer, (2) 800# drill collars  Price:  $89,000

MAYHEW 1000(Ref#1830Nb)  Gardner Denver 667 air compressor, 3 x 2 centrifugal pump, 5-1/4" retractable table, 23" x 3-1/2" square kelly, pulldown, mechanical clutches, mounted on 1972 Ford F8000 truck with Cat 3208 engine, PTO, 400" of 2-3/8" x 20" drill pipe, 3 hyd leveling jacks, good condition, currently drilling  Price:  $75,000

MAYHEW 1000(Ref#14378)  Manufactured 1963, Failing 4 x 5 mud pump (rebuilt with new pistons, liners and rods), PTO, mounted on 1963 Chevy truck, 327 V8 propane engine, drill collars, subs, etc., 250" of 2-7/8" x 15" pipe, 200" of 2-7/8" x 20" pipe, ready drill drill.    Package:  $32,500

MAYHEW 1000(Ref#14841)  5 x 6 mud pump, 350 cfm air compressor, 7-1/2" stationary table, 23" kelly, pulldown, breakout wrench, mechanical clutches, mounted on 1980 Ford F800 truck with 429 gas engine, 3 leveling jacks, 150" of 20" drill pipe, some tools, needs swivel and yoke, needs work    PRICE:  $16,500

MAYHEW 1000(Ref#10929)  1970"s, double drum, 5-1/2" GD stationary table, 4-1/2 x 5 GD mud pump, mounted on 1979 International truck with Cat 3208 diesel engine, 2 rear hyd leveling jacks, rod rack, new pulldown chains, shafts and bearings, rebuilt swivel. 300" of 15" Mayhew pipe (some 2-3/8, some 2-7/8) slips for both, currently drilling, good condition

MAYHEW 1000(Ref#8225)  1968, 4 x 5 Mission centrifugal pump, 5-1/4 set table, manual pulldown, 300" drill pipe, 4 hyd jacks, new shaft in mud pump, new gooseneck at swivel, on 1984 Mack Superliner with 350 Mack engine  Price:  $54,500

MAYHEW 1000(Ref#15274T)  Manufactured 1972, mounted on 1991 Morooka MST1500 track with Isuzu 4 cyl motor, dump bed, 100 hp John Deere deck engine, 5 x 6 mud pump, 300 gallon water tank  Price:  $100,000

MAYHEW 1000(Ref#7337N)  mounted on Cat D7 crawler with gas pony motor, 8" wide w/4 sp manual transmission, 22" width tracks, Gardner Denver 580 air compressor (low pressure high volume), Bean water injection pump (12-15 gpm), 200 gallon water tank, Mayhew 1000 5-1/8" stationary table, 3 speed rotary transmission, 2" Mayhew swivel, double drum drawworks, 23" fluted kelly, hydraulic pulldown with 4 speed transmission, mechanical clutches, breakout wrench, rod rack, 140" of 2-3/8" x 20" drill pipe, ready to go   Price:$35,000

1000" MUD ROTARY CRAWLER RIG(Ref#3122T) Built 2019. Mud rotary crawler rig. Fully Guaranteed. Capacity 1000", 4" - 13" diameter. MTU Diesel engine: 4R 1000 C50, 5.1L 228HP. Torque at 1200 - 1600 rpm: 1400 NM. Climb ability: 25 degrees. Max height from ground: 12.6". Dimensions: 24" x 7" x 9". 19,500 lbs. Rotation speed: 0-100rpm. Rotation torque: 4130 ft/lbs. Lifting power: 13 tons. Lifting speed: 88 ft/min. Air pressure: 150-500 psi. Air consumption (SCFM) 565-1412. Mud pump: Input 74hp, suction diameter: 3.5", discharge diameter: 2.0". Flow: 158 gal/min, 232 strokes/min, 500 PSI. Located New York. Price: $335,000

MAYHEW 1000(Ref#4786N) mounted on a 1978 Scott, 4 ½ x 6 Gardner Denver mud pump, completely overhauled, 2 7/8" IF x 10" rods  Price:  $$40,000 Canadian

MAYHEW 1000(parts rig, or can be fixed to work)  (Ref#11490Ta)  Mounted on Crane Carrier, 671 Detroit, 750/350 air compressor, no mud pump, 5" rotary table, chain pulldown, no drill pipe, 3-3/8" kelly  POR

MAYHEW 500(Ref#1691T)  Early 1960"s rig, 4-1/2 x 6 mud pump, developmental air compressor, 5-1/4" retractable table, 3" square kelly (not on rig, but available), 1250 Holemaster mast, needs transfer case, set up to run 20" Mayhew Jr pipe, breakout tongs, 2 rear hydraulic jacks, mounted on 1999 International 4900 single axle truck with DT466E engine, PTO, can remove rig from truck  Price on Request  (no pipe available)

MAYHEW 500(Ref#3374T)  5" stationary table, 4 x 5 Gardner Denver mud pump, developmental air compressor, 4" square kelly, hydraulic pulldown, mechanical clutches, mounted on 1990 GMC Kodiak truck with Cat 3208 engine, 3 hyd leveling jacks, pipe rack, 220" of 2-7/8" x 15" drill pipe  Price:  $49,500

MAYHEW 500(Ref#6196T)  Manufactured 1970, 30" mast above table, 4-1/2 x 5 duel piston pump, 5-1/4" retractable table, mounted on 1987 Ford F700 single axle truck, 370 gas engine, 3 leveling jacks, chain hydraulic pulldown, no drill pipe (uses 20" joints), rig needs rebuilding, needs new truck  Price:  $37,500

GARDNER DENVER 500(Ref#14014)  Manufactured 1989, mounted on Intetrnational 4700  4 x 4 truck with diesel engine, 5 x 6 Gardner Denver mud pump, 427 air compressor, 2 rear leveling jacks, 25" mast, good condition  Price:  $80,000

GARDNER DENVER 500(Ref#8995R)  Ford diesel on deck, 5 x 6 Gardner Denver mud pump, no air, 2-7/8" kelly, mounted on 1998 GMC truck with gas engine, 105" of 2" x 15" drill pipe w/2-7/8 IF conn Price:$35,000

GARDNER DENVER 500(Ref#15357)  Manufactured 1981, 4-1/2 x 5" Gardner Denver pump, 427 air compressor, mounted on 1981 6x6 Ford w/8.2 liter fuel pincher, 3 hyd jacks, 25" mast, 18" fluted kelly, low hours  Price:  $70,000

GARDNER DENVER 500(Ref#3891R) Manufactured 1980, mounted on 1998 Freightliner FL70 with diesel engine, 5x6 mud pump, no air, 3 3/8" x 18" square Kelly, 5-1/2" stationary table, hydraulic pulldown, mechanical clutches, breakout tongs, pipe rack, 4 hydraulic leveling jacks, runs 2 7/8" x 15" Mayhew Jr pipe (some avail)  Price:  $49,500

GARDNER DENVER 500(Ref#514N)  Mid 1970"s, mounted on 1978 Ford 4 wheel drive truck, Ford engine, 60 cfm air compressor, 4-1/2 x 5 Failing mud pump, 300" pipe, bits, drill collars  Price:  $65,000

GARDNER DENVER 500(Ref#3774RA) mounted on 1990 International with DT466 engine, 4 1/2 x5 GD mud pump, big GD air compressor, 6 ¼" retractable table, 18" kelly, approx 200" of 2 3/8"IF drill pipe, many extras  Price:  $57,500

MAYHEW 500(Ref#1271N)  Manufactured 1979, on original 1979 Ford F7000 truck, recent new 3208 Cat engine, clutch, rear, springs and tires, 3 lines (sandline, tool line, kelly lines), 3 leveling jacks, 5-1/4" retractable table, 32" mast, 23" fluted kelly, 5 x 6 Gardner Denver mud pump, stored inside, 300" of 2-7/8 IF x 15" drill pipe, no air, mechanical clutches, pulldown, 3 leveling jacks   Price:  $55,000

GARDNER DENVER 500(Ref#13403)  Manufactured 1978, 5 x 6 mud pump, 32" mast, 2" Little Giant swivel, 23" kelly, 5-1/4" non-retractable table, mounted on 1980 International 4600 single axle truck w/DT466 diesel engine, PTO, chain pulldown, breakout tongs, 3 hyd leveling jacks, 200" Mayhew Jr 15" drill pipe, good condition  Price:  $55,000

GARDNER DENVER 500(Ref#11168)  7042 power tower engine, mounted on 1979 Ford F800 with Cat 3208 engine, low hours, truck has 5 speed and 4 speed auxiliary transmission, Wheatley 4-1/2 x 5 mud pump, core extruder, hydraulic hole loader spool, 300" of 20" Mayhew Jr. drill pipe, 3 jacks, good condition, ready to drill  Price:  $45,000

GARDNER DENVER 500(Ref#11158Na)  factory mounted on D-4 Caterpillar, 4 hydraulic jacks, 4-1/2 x 5" Gardner Denver mud pump, Gardner Denver 427 cfm air compressor, 13" kelly, 4-1/2" retractable table, 1-1/2" swivel, good condition, needs paint  Price:  $30,000

MAYHEW 500(Ref#8933T)  Late 1970"s rig, truck burnt up and rig is good, 5 x 6 mud pump, developmental air compressor, 5-1/4" stationary table, 3-1/2" kelly, no breakout wrench, mechanical clutches, chain pulldown, 4 hyd leveling jacks, pipe rack, 200" of 2-3/8" IF x 20" drill pipe  Price:  $9,500

MAYHEW 500 DRILLING RIG(Ref#1907T)  5 x 6 mud pump, 2" swing, 18" kelly bar, 4 jacks, 5-1/4" stationary table, sandline, mounted on 1992 GMC Topkick 427 gas engine, 150" drill rod, tools and subs, pipe rack  Price:  $45,500

MAYHEW 250(Ref#10370RA) mounted on Chevy with 327 gas engine (should be remounted), 2x3 centrifugal mud pump, 5" stationary table, 10" Kelly, rod box, mechanical clutches, chain pulldown, no air, no breakout wrench, no leveling jacks, 100" of 10" x 2" rods  Price:  $17,500

MAYHEW 200(Ref#14583R)  Manufactured 1974, mounted on Ford F600 truck, 390 engine, 3 levelng jacks, 600" of 2-3/8" x 10" drill pipe, no pulldown (can put back)  Price:  $13,000

MAYHEW 200(Ref#2782N)  mounted on Ford 1 ton truck with new 7.3 liter diesel engine (less than 5000 miles), 4-1/2 x 5 mud pump, 9" stationary table, mechanical clutches, no pulldown, 2 rear hydraulic leveling jacks, 100" of 2-3/8" x 10" pipe, rig has been sitting 2 years  Price:  $35,000

MAYHEW 200(Ref#10635R)  Manufactured 1974, diesel rig engine (blown head gasket, needs work), mounted on Ford F600 truck with 390 gas engine, 3 leveling jacks, 600’ of 2-3/8” x 10’ drill pipe, no pulldown (can put back), truck does not run, sitting a while Price:  $13,000

MAYHEW 200 DRILL RIG(Ref#4075Tb)  Wheatley mud pump, mounted on 2000 Dodge Ram XLT dually with Cummins diesel engine, PTO, runs 10’ rods, needs some work  Price as is:  $27,500

GARDNER DENVER 18T DRILL RIG(Ref#7125T)  Mounted on Ford tandem axle truck with Detroit 8V71, standard transmission, Detroit 6V71 deck engine, 500/200 air compressor, table drive, drills with air and tricone bit, rod box, 300’ of 3” x 20’ drill pipe, 22’ mast, stored inside, running condition, dimensions 35’ x 10’6” x 8’W 36,000 lbs  Price:  $32,500

MAYHEW JUNIOR(Ref#2534T)  Trailer mounted, 2 x 4 mud pump, Slant 6 300 cu/in Dodge gas engine, stationary rotary table, 1 front and 2 rear screw jacks, rod box, 2-1/2” x 10’ pipe, bits  POR

Hole cleaning in ERD well could be represented as a hole cleaning machine with lots of variables acting like gears or cogs - they all link or mesh together to make the machine run efficiently.

Annular area drives the speed at which the fluid and suspended drilled material will travel up the hole at given flow rate. Smaller the clearance between drill string components and borehole – faster the fluid will flow across this particular interval. Generally, it is recommended to keep the annular fluid velocity (AV) above 150 ft / min (46 m / min). Desired AVs could be controlled by changes of mud circulation rate, drill string component sizes and wellbore internal diameter. This is why underreaming is one of the last resorts in ERD – elevated flow rates are required to drill larger open hole. This could be a problem if the rig has low-rated high pressure system.

In most cases, AVs across BHA components are quite high and cuttings are “flushed away” in seconds. Drill pipe normally has smaller OD than BHA components or it is situated across large ID casing / liner string. If annular velocity is insufficient, cuttings accumulation is likely to form in high angle sections and at geometry changes such as formation washouts and immediately above liner tops. In addition, accelerated barite sagging is expected in areas of low annular velocity.

Here is the real-life example: one of our clients wanted to drill 6-⅛” hole section in a well with 3 liners in place: 11-¼”, 9-⅝” and 7-⅝” (not tied-back due to ECD constraints). Annular velocity inside 11-¾” liner and above was found to be insufficient to deliver adequate hole cleaning for given flow rates, dropping to as low as 15 m/min across 13-⅜” casing interval. Drill string and mud rheology optimization allowed us to install 9-⅝” tie-back and keep actual ECD below perceived fracture gradient.

This article describes the causes of and steps to prevent clogging and/or damage to septic pumps, grinder pumps, and sewage ejector pumps. We include excerpts from sewage or septic grinder pump manufacturers" installation manuals that describe sewage pump diagnosis & repair procedures.

This article series also lists septic and grinder pump types, brands, and will identify pumps that are resistant to damage from debris or objects that may enter the toilet, sewer line, or septic