workover rig diagram pricelist

Founded in 1969, RG Petro-Machinery Group Co., Ltd. is the manufacturing base of Chinese major technical equipment and fast move petroleum drilling rigs. At present, it has 12 subsidiaries with 9 production and supporting branches. Its main products include 12 series of more than 200 varieties, such as truck-mounted drilling rigs, skid-mounted drilling rigs, trailer-mounted drilling rigs, workover rigs, oilwell logging equipment, and integrated automatic well service equipment.RG Group has established a complete scientific and technical research and development system. It has academician workstation, post-doctoral scientific research workstation, and the National Petroleum Truck-mounted Equipment Standardization Work Department. It is responsible for hosting in drafting the national petroleum and petrochemical industry truck-mounted equipment standards. It has a nationally recognized enterprise technology center and metrology inspection laboratory, and has strong machinery fabrication and system integration capabilities. The company has passed ISO9001 and API Q1 international quality system and been authorized to use API 4F, 7K, and 8C monograms since 1990s.RG provides the oil and gas drilling equipment and all-round services according to the demands of the customers globally, including drilling services, equipment maintenance services, engineering services, inspection services, and equipment leasing etc. RG Petro-Machinery Group Co., Ltd. makes the great efforts to provide the first class equipment and services for the oil and gas industry of China and the world.

Enjoy the best returns on your investment with these supreme workover rig price ranges at Alibaba.com. Their efficacy and reliability will prove that they’re worth their price tags. They will empower you to attain your mining and drilling goals and definitely surpass your expectations.

workover rig price options also include an air compressor, a mud pump, drilling rods of various sizes, connectors, and a drilling tower. Drilling is done using drill bits of various shapes, sizes, and compositions. You can choose between diamond bits, alloy ring-shaped bits, 3-wing alloy bits, PDC bits, and hammer bits. Each drill bit uses different drilling methods, including rotary, percussion, blast hole, and core drilling.

Are you looking for a wholesale workover rig price? Look no more as Alibaba.com has all sorts of pile drivers that will ease your next pile driving process. A pile-driving machine is critical equipment in constructing structures and buildings as it helps in driving piles into the soil. These piles help in providing foundation support for a structure or building under construction. In that way, you can comfortably move a load of the structure to a difficult depth without a machine. Regarding your liking workovers rig price, visit Alibcom.com as they have unlimited pile available at wholesale prices. Inther you are looking for pneumatic tools or hydraulic pipes, you will find them type at affordable prices. If you need a drill, it can advisable to have a workover r price.

Jereh truck/trailer mounted workover rig is mechanically and hydraulically driven. The power system, drawworks, mast, travelling system and transmission mechanism of the workover rig are mounted on the self-propelled chassis, which improves the moving efficiency greatly. Now, Jereh truck mounted workover rig series cover the workover depth from 2500m to 7000m and drawworks power from 250HP to 1000HP, featuring high operation load, reliable performance, excellent off-road performance, convenient movement and low operation/moving cost. Besides, workover rigs for arctic, desert and highland applications are available.

Snubbing units have evolved into one of the most capable and efficient well servicing tools in the oil & gas industry. In the 1920"s, the need for a rig to work with pressures at surface drove the invention of the snubbing unit. The first snubbing unit was primarily designed to work in well control situations to "snub" drill pipe and or casing into, or out of, a well bore when conventional well killing methods could not be used. The first snubbing unit relied on the draw works of the companion rig to supply its" power. A series of sheaves, cables and counter weights were rigged up so that as the rig"s traveling blocks hoisted up, the snubbing unit would snub in the hole. Conversely, when the traveling blocks on the rig were lowered, the snubbing unit would snub out of the hole. As you can imagine, this required close communication with several different contractors in order to perform the work safely and efficiently.

Today"s snubbing units can be employed to provide a wide range of services. In essence, a snubbing unit is a hydraulic rig that can do everything a rig can do, plus it can perform under pressure in an under balanced live well state. This is especially critical to the operators in the Haynesville Shale, which is known for HPHT wells. With the use of the snubbing units" hydraulic rotary, the unit can be employed for fishing, milling, drilling, side tracking or any task needed to remove bridge plugs, cement or deepen wells.

The industry has become more aware of damages caused by heavy kill weight fluids and mud. This has helped make snubbing units more popular in a completion and workover role, versus its" traditional use as a well control response tool. With the advances in drilling technologies in the unconventional shale market, the benefits of snubbing units have become very apparent. These types of completions often have laterals extending out thousands of feet. With costly stimulations used to help extract the gas more efficiently, operators often times do not wish to turn around and load the well with heavy fluids to complete the well dead.

In conclusion, with the snubbing unit"s size, ability to handle pressure, rotary capabilities, rigidity of jointed tubing and minimal wall contact, snubbing units have become the chosen resource for these types of completions.

Here"s when workover operations come into play. Every time a well has production problems it needs to be repaired. In this article you"re going to be reading about one particular problem in a well and what we did to solve it. If you"re a young professional in the oil industry and never had the chance to be present in a workover operation, I invite you to go through these lines, hoping they help you knowing a little more about this amazing and unpredictable world.

A few years ago, my rig team received information about the next oil well that we would be repairing. Just by reading the well"s name we immediately inferred that we were going to deal with a really old well. The job program indicated us that this well had a high water cut, this means that most of the production of the well was formation water. We needed to isolate the water producing sandstone in order to leave an upper sandstone open to production.

The well was originally drilled in the 70´s by a split drilling rig, this type of rig was used in the past for operations on shallow waters and it was not like a typical cantilever drilling barge. In this rig, the derrick was separated from the barge and it had to be armed above the foundation of the well. This type of foundation is known as Light Rig Mover foundation and it is formed by four heads with two piles each and a square metal frame 24’ x 24’ approximately. With this particular well, we recall that old saying that states: "Don’t judge a book just by its cover". Let’s move on to the seven steps

The first thing we do before working on any well is an inspection of the location before the rig move, this is very important to determine wheatear the barge can fit in the well location or not. During this well’s inspection we could see that both the well foundation and the wellhead were not in the best condition, but this was fixable and the job could be done, though it would be a real challenge. Finally, the rig was moved and positioned on the well location.

Before removing the christmas tree in order to install the BOPs, we had to secure the tubing by settling a safety valve in the upper landing nipple. In most cases we secure the well by installing a check valve in the tubing hanger, but this well did not have an extended neck hanger, instead it had a wrap around tubing hanger which made the use of slickline tools necessary. We always make a calibration trip before running anything else into a well. In this particular case the tubing string originally installed in the well was 2-7/8”, 6.5 lb/ft from surface to 11413’, and 2-3/8”, 4.7 lb/ft from 11413’ to the entry guide at 11706’. With a Baker Hughes FH Hydraulic packer at 11415’ and an Evolution R3 retrievable packer at 11697’, five gas lift mandrels, a 1.875” landing nipple at 11704’, a 2.313” landing nipple at 214’ and no sliding sleeves. We first ran a 1-27/32” gauge cutter to the bottom of the hole at 12211’ and then a 2-9/32” gauge cutter to 11413’ locating the crossover 2-7/8” x 2-3/8”. Then, before running the valve we ran a slickline tubing scratcher in order to guarantee a good setting of it. So, after a few trips, we installed the valve at 214’ and let the well secured to install de BOP and continue the operations with proper safety.

This saved us from all the fishing jobs, which in this type of wells is at least two fishing trips (without any complications) and perhaps a few milling trips if the tubing is somehow damaged by the wireline cutters, and this represent lots of saved rig time for the well. In general, the fishing operations take from 40% to 50% of the time needed to finish a workover job. The only thing we had to do was a quick calibration trip to 11945’ with a 4-5/8” tapered mill to guarantee a good operation in our next step.

Once we retrieve an old completion string from a well, we usually run a mechanical packer to make a casing integrity test, in this case we ran an Evolution R3 packer for 5-1/2”, 17-20 lbs/ft casing (not the same one that was retrieve from the original completion, obviously), down to 11645’, 20’ above the first perforated intervals. After successfully testing the casing, the following step was a wireline job.

The last step of this workover job, after solving the bottom hole problem and replacing the wellhead, was to run the well completion. The equipment was ran down to 11402’ and it was composed by 368 joints of 2-7/8” 6.5 lbs/ft tubing, five gas lift mandrels, two 2.313” landing nipples, and a Weatherford Stratobar hydraulic packer, the completion was hanged in the new tubing head installed and then we performed the final slickline jobs to test the tubing string and set the hydraulic packer without any major complications.

This sums up our entire work on this well, leaving it ready for production. Yes, after more than 40 years of being originally drilled, this well is still capable of producing a very significant amount of crude oil. That’s how important workover operations are, if a well has the proper maintenance, its commercial life is longer and more productive. Besides, a workover operation is not as expensive as the drilling of a new well.

I think is only fair to say that each one of the steps I described include several activities that might need a little more detailed explanation to be completely understood, but it would be extending my writing too much. I also think it’s important to let readers know the reason why I decided to write about this particular well; if you look back in step 3, I said that the fishing activities take 40-50 % of the rig time needed to finish a workover job, the special thing about this well is that we didn’t required fishing activities since the original well completion was entirely retrieved just by pulling it out of the well. So, this is one of those cases when you get very, very lucky, and after a not quite good first impression we ended up successfully completing a job estimated to be done in 20 days in only 12.5 days, congrats for us!

Download Workover & Drilling Rig Inspection Checklist As we mentioned in the Rig Audit Article, rig inspection is an important process that shall be done from time to time. Especially, after the rig moving to a new drilling location.

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Among Survey Participants:Rig Demand Down QTQ [See Question 1 on Statistical Review]. Seven of the eight respondents said that demand had dropped in 1Q15 vs 4Q14 and all but one blamed lower oil prices for the slowing. One respondent that had seen a slowdown in demand said it was because they had finished all of their completion work. The respondent who had not seen an effect on demand said that their work was steady, but they were hearing of others slowing down.Mid-Tier Well Service Manager: “We are seeing demand slow for rigs and prices are being reduced. Operators are asking for 20% reductions, some are asking for 30% and they may get it. The greater reductions will be from people who are local because they don"t have the overhead expense. The service won’t be as good. On average, operators may get 15% of that 30% they are seeking in reductions.”

Number of Rigs Sufficient [See Question 2 on Statistical Review]. Six of the eight respondents said that the workover rig inventory is excessive for the current demand, while two said that it is sufficient but tipping toward excessive.Mid-Tier Operator: “Operators here are basically focusing on the higher production wells and going to ignore the lower ones. We have heard companies are laying down workover rigs. One company is going from 17 to 13.”

Well Service Work Weighted Toward Standard Workovers and Routine Maintenance [See Question 3 on Statistical Review]. Among all respondents, standard workover work accounts for 34% on average, routine maintenance accounts for 34%, plug and abandonment (P&A) accounts for 16% and completion work accounts for 16%.Mid-Tier Well Service Manager: “Our work slowed because we finished our completion work so the client gave us some production work to keep us steady till we finish this fracking job.”

Hourly Rates Consistent Among HP Series [See Question 5 on Statistical Review]. Most workover rig horsepower falls within the range of the 500 series. The 500 HP hourly rates average $310 to $400/hour depending on what ancillary equipment is contracted. See Table II for Average Hourly Rates.

Hart Energy researchers completed interviews with nine industry participants in the workover/well service segment in areas of the Rocky Mountains outside of the Bakken Shale play. Participants included one oil and gas operator and seven managers with well service companies. Interviews were conducted during January 2015.

3. Looking at your slate of well service work - on a percentage basis - how much of it is workover vs. routine maintenance vs. plug & abandonment (P&A) vs. completion work?

through a complex pore network to producing wells. With the passage oftime, the producing wells for various reasons become sick and a steep fall intheir production levels is registered. To repair these sick wells and rejuvenateoil production from them, work over operations are carried out.The primary objective of workover operation is to maintain the wells inoptimum producing condition.The rig which is smaller for doing this job is called WORKOVER RIG.This rig is smaller than the drilling rig as far as capacity, height, leg spacingsetc are concerned.In addition to solving specific well and reservoir control problems,workovers can provide a check on lateral and vertical movement & currentlocation of oil, water & gas in specific zones & reservoirs.

Surface Equipments of a standard workover Rig1. Rotary Table. 2. Prime movers. 3. Derrick 4. Substructure. 5. Drawworks6. Mud Pumps. 7. Blow out preventers

3. DERRICK:- The derrick is the structure which affords the verticalclearance necessary for conducting such operations as running in &pulling out of tools and tubings. It must be strong enough to withstand theloads imposed upon it.These loads vary with depth and the size of hole and casing.An attempt to reduce operating costs now-a-days, portable unitized rigs arebeing used. The entire rig is mounted either on skid or trailer for maximumportability.The principal advantages are savings in transportation costs & rig up.

5. DRAW-WORKS: The draw works or hoist is the key piece ofequipment. Its functions are:a) It is the control centre from which the driller operates the rig. Itcontains the clutches, chains, sprockets & other controls which enablethe rig power to be diverted to the particular operation at hand.b) It houses the drum which spools the drilling line during hoistingoperations and also feed-off, during running-in. Draw-works arecommonly designated by a horse-power and depth rating.

a) Move-in (b) Rig-up (c) Rig Down are carried out by a workover rigwhen we go from one well to another.Rigs are moved from one location to another one, on roads. If there isno road, a temporary road is constructed for the movement.

Leveling is done by hydraulic jacks.There are many reasons which make workover necessary or/ and invitingThey are:1. Water shut-off jobs2. Transfer to different zones.w- 4

Operations carried out at any oil and gas well with a view to maintain orimprove production/injection is known as work over operations, For theseoperations smaller size rigs are utilised which are known as work overrigs.These operations are necessiated from the fact that most of the oil andgas wells sonner or later starts behaving erratically and production of

3. Recompletion workover job such as recompletions in new horizon orhorizons or converting a well from a producing one to injection well.A little details of the major workover jobs1. Water shut off jobs-some times alongwith oil, water also starts coming.This may be due to any one or combination of more than one of thefollowings reasons.a. Water zone may be near to perforations.b. Channeling behind casing due to bad cementation.c. Water coning or fingering.d. Early break through of water in highly permeable bedse. Casing leak against water zonew- 7

WORKOVER TO IMPROVE PRODUCTION.Some times due to scale formations against the perforations production of oiland gas goes down. This scale formation may be due to mud cake, shale,paraffin or swelling of shale which plugs the channels of flow.Detectionw- 8

Repair of defective cementation :Defective cementation causes water or gas channeling, whicheffects the production adversely. Cement bond log indicates the portionsbehind casing where cement bonding is not alright.Such types of defects can be repaired bya.

Sand Control - A technique with the help of workover rig.Production of loose sand will adversely affect the tubulars and productionequipment. Also deposition of loose sand at the bottom will block the welland production may stop. Production of sand can be prevented by.a.

DEFICIENCY FOUND IN B.OP. AT WORKOVER RIGS.1. B.O.P has only handwheels for closing the wells.2. Handwheels not attached to RAM locks3. No checking for cracks etc. in adapter spools4. Use of old ring gaskets that are pitted or mashed.5. No safety valve available6. No backpressure valve available.7. Set-up cement in some lines and valves in manifold8. Pipes not anchored against vibration.9. No support for choke and kill lines which have heavy valves installed.10.Safety valve wrench not readily available.11. Crews not knowing even the obvious signs of kicks or blowouts.12.No knowledge of burst rating of casing (or whether it should be deratedbecause of mechanical abuse or corrosion).

Any object that obstructs the hole or impedes further drilling or running ofpipe is called a Fish, and removing this obstruction or correcting the problemis called FISHING. Since fishing is required up to 20 % of all drilling jobs and80 % of all workover jobs, the skills and tools required form a sizeable serviceindustry.

Primary recovery depends upon natural reservoir energy to drive the oilthrough a complex pore network to producing wells. With the passage oftime, the producing wells for various reasons become sick and a steep fall intheir production levels is registered. To repair these sick wells and rejuvenateoil production from them, work over operations are carried out.The primary objective of workover operation is to maintain the wells inoptimum producing condition.The rig which is smaller for doing this job is called WORKOVER RIG.This rig is smaller than the drilling rig as far as capacity, height, leg spacingsetc are concerned.In addition to solving specific well and reservoir control problems,workovers can provide a check on lateral and vertical movement & currentlocation of oil, water & gas in specific zones & reservoirs.

Surface Equipments of a standard workover Rig1. Rotary Table. 2. Prime movers. 3. Derrick 4. Substructure. 5. Drawworks6. Mud Pumps. 7. Blow out preventers

3. DERRICK:- The derrick is the structure which affords the verticalclearance necessary for conducting such operations as running in &pulling out of tools and tubings. It must be strong enough to withstand theloads imposed upon it.These loads vary with depth and the size of hole and casing.An attempt to reduce operating costs now-a-days, portable unitized rigs arebeing used. The entire rig is mounted either on skid or trailer for maximumportability.The principal advantages are savings in transportation costs & rig up.

5. DRAW-WORKS: The draw works or hoist is the key piece ofequipment. Its functions are:a) It is the control centre from which the driller operates the rig. Itcontains the clutches, chains, sprockets & other controls which enablethe rig power to be diverted to the particular operation at hand.b) It houses the drum which spools the drilling line during hoistingoperations and also feed-off, during running-in. Draw-works arecommonly designated by a horse-power and depth rating.

a) Move-in (b) Rig-up (c) Rig Down are carried out by a workover rigwhen we go from one well to another.Rigs are moved from one location to another one, on roads. If there isno road, a temporary road is constructed for the movement.

Leveling is done by hydraulic jacks.There are many reasons which make workover necessary or/ and invitingThey are:1. Water shut-off jobs2. Transfer to different zones.w- 4

Operations carried out at any oil and gas well with a view to maintain orimprove production/injection is known as work over operations, For theseoperations smaller size rigs are utilised which are known as work overrigs.These operations are necessiated from the fact that most of the oil andgas wells sonner or later starts behaving erratically and production of

3. Recompletion workover job such as recompletions in new horizon orhorizons or converting a well from a producing one to injection well.A little details of the major workover jobs1. Water shut off jobs-some times alongwith oil, water also starts coming.This may be due to any one or combination of more than one of thefollowings reasons.a. Water zone may be near to perforations.b. Channeling behind casing due to bad cementation.c. Water coning or fingering.d. Early break through of water in highly permeable bedse. Casing leak against water zonew- 7

WORKOVER TO IMPROVE PRODUCTION.Some times due to scale formations against the perforations production of oiland gas goes down. This scale formation may be due to mud cake, shale,paraffin or swelling of shale which plugs the channels of flow.Detectionw- 8

Repair of defective cementation :Defective cementation causes water or gas channeling, whicheffects the production adversely. Cement bond log indicates the portionsbehind casing where cement bonding is not alright.Such types of defects can be repaired bya.

Sand Control - A technique with the help of workover rig.Production of loose sand will adversely affect the tubulars and productionequipment. Also deposition of loose sand at the bottom will block the welland production may stop. Production of sand can be prevented by.a.

DEFICIENCY FOUND IN B.OP. AT WORKOVER RIGS.1. B.O.P has only handwheels for closing the wells.2. Handwheels not attached to RAM locks3. No checking for cracks etc. in adapter spools4. Use of old ring gaskets that are pitted or mashed.5. No safety valve available6. No backpressure valve available.7. Set-up cement in some lines and valves in manifold8. Pipes not anchored against vibration.9. No support for choke and kill lines which have heavy valves installed.10.Safety valve wrench not readily available.11. Crews not knowing even the obvious signs of kicks or blowouts.12.No knowledge of burst rating of casing (or whether it should be deratedbecause of mechanical abuse or corrosion).

Any object that obstructs the hole or impedes further drilling or running ofpipe is called a Fish, and removing this obstruction or correcting the problemis called FISHING. Since fishing is required up to 20 % of all drilling jobs and80 % of all workover jobs, the skills and tools required form a sizeable serviceindustry.