CN104695910A - Relay lifting oil production device and method for same type of volumetric pumps - Google Patents

Relay lifting oil production device and method for same type of volumetric pumps Download PDF

Info

Publication number
CN104695910A
CN104695910A CN201510086871.4A CN201510086871A CN104695910A CN 104695910 A CN104695910 A CN 104695910A CN 201510086871 A CN201510086871 A CN 201510086871A CN 104695910 A CN104695910 A CN 104695910A
Authority
CN
China
Prior art keywords
lifting
pump
oil
relay
oil pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510086871.4A
Other languages
Chinese (zh)
Inventor
吴晓东
韩国庆
安永生
岑学齐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Petroleum Beijing CUPB
Original Assignee
China University of Petroleum Beijing CUPB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Petroleum Beijing CUPB filed Critical China University of Petroleum Beijing CUPB
Priority to CN201510086871.4A priority Critical patent/CN104695910A/en
Publication of CN104695910A publication Critical patent/CN104695910A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle

Abstract

The invention provides a relay lifting oil production device and method for same type of volumetric pumps. The relay lifting oil production device comprises a plurality of lift pumps connected with an oil pipe in series, a check valve connected with the lower part of the oil pipe, a plurality of thrust bearings connected with the oil pipe in a hanging manner and a sucker rod positioned in the oil pipe, wherein the sucker rod is respectively connected with the thrust bearings and rotors of the lift pumps. According to the relay lifting oil production device and method for the same type of volumetric pumps, provided by the invention, as the lift pumps which are connected in series are adopted for relay lifting, the problem of small lift of the single lift pump is solved; with the adoption of the thrust bearings, the rod load for restraining the depth of lifting equipment is transferred, and the problem that the setting depth of the lifting equipment in a deep well is restrained is solved; as the same type of lift pumps are adopted for relay lifting, the problem of low system efficiency in composite lifting is solved. The coordination among the oil recovery lifting equipment is good, and the efficiency of the oil recovery lifting system is high.

Description

Similar displacement pump relay lifting extracting device of oil and method
Technical field
The present invention has about a kind of extracting device of oil and method, especially has about the similar displacement pump relay lifting extracting device of oil in a kind of deep reservoir wellbore lift technical field and method.
Background technology
Along with continuing to increase energy demand, the continuous progress of exploration and development technology, makes the exploitation of deep reservoir become possibility.The continuous discovery of deep reservoir, drilling depth is noted down and also constantly refreshes, particularly China is western, and a large amount of deep reservoir in the Tarim Basin being representative with storehouse car down warping region, southwest Tarim depression drops into exploration and development.But, large quantities of deep reservoir fluid supply capacity is poor, stratum energy is low, existing lifting technology is difficult to the exploitation adapting to such oil reservoir, cause on the one hand part Deep Reservoirs to produce the later stage cannot exploit, rate when the short impact of part deep-well pump detection period drives a well on the other hand thus affect output and increase maintainability operating cost.
Solve the common practice of deep oil well lifting was both at home and abroad that little pump is taken out deeply in the past, namely sacrificed displacement requirements and reached required hydraulic head, but to improve lift technical difficulty further larger for this single artificial lifting way.The other method strengthening the lifting degree of depth adopts compound lifting, and existing compound artificial lifting way has several as follows: 1) sucker rod pump and hydraulic pump etc. are without the lifting of bar artificial lifting way compound; 2) electric submersible pump and the lifting of gaslift compound.These compound artificial lifting way adopt two kinds of different artificial lifting way to carry out assembly mostly, and different artificial lifting way, the characteristic curve of lifting equipment is different, existing compound artificial lifting way is caused to there are two outstanding problems: 1) system coordination is poor, this is because two kinds of different artificial lifting way working methods are often different, pressure/discharge capacity relationship difference is very large, is difficult to the combination selecting both couplings; 2) system effectiveness is lower, even if select a certain pressure/discharge capacity index, also often sacrifices the efficiency of wherein a kind of artificial lifting way, causes overall system efficiency to reduce.
Summary of the invention
The object of this invention is to provide a kind of similar displacement pump relay lifting extracting device of oil, adopt the lifting of multiple lifting pump tandem, solve the problem that single lifting pump lift is little; Roofbolt load dark under adopting thrust bearing to displaced restriction lifting equipment, solves problem deeply limited under lifting equipment in deep-well; Adopt similar lifting pump relay lifting, solve the problem that in compound lifting, system effectiveness is low.Between this similar displacement pump relay lifting extracting device of oil oil recovery lifting equipment, harmony is good, and oil recovery hoisting system efficiency is high.
Another object of the present invention is to provide a kind of relay lifting oil production method, adopts the lifting of multiple lifting pump tandem, solves the problem that single lifting pump lift is little; Roofbolt load dark under adopting thrust bearing to displaced restriction lifting equipment, solves problem deeply limited under lifting equipment in deep-well; Adopt similar lifting pump relay lifting, solve the problem that in compound lifting, system effectiveness is low.Between this relay lifting oil production method oil recovery lifting equipment, harmony is good, and oil recovery hoisting system efficiency is high.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of similar displacement pump relay lifting extracting device of oil, it comprises the multiple lifting pumps be connected in series on oil pipe; Be connected to the ball-and-seat of described oil pipe bottom; Be articulated in the multiple thrust bearings on described oil pipe; Be positioned at the sucker rod of described oil pipe, described sucker rod is connected with described multiple lifting pump with described multiple thrust bearing respectively.
In a preferred embodiment, described lifting pump is rotary volume pump, and it has stators and rotators, described oil pipe is connected in series with the stator of multiple described lifting pump, described sucker rod is connected in series with the rotor of multiple described lifting pump.
In a preferred embodiment, described lifting pump is screw pump.
In a preferred embodiment, described lifting pump is vane pump.
The present invention also provides a kind of relay lifting oil production method, and described relay lifting oil production method adopts above-mentioned similar displacement pump relay lifting extracting device of oil, and described relay lifting oil production method comprises the steps:
A) in oil pipe, liquid is injected, until the lifting pump near well head place sinks in described liquid;
B) rotate sucker rod drives multiple lifting pump to work simultaneously, and shaft bottom crude oil is lifted to ground by multiple described lifting pump by relay.
In a preferred embodiment, described oil pipe is mounted with multiple thrust bearing, described thrust bearing is connected on described sucker rod.
In a preferred embodiment, described lifting pump is screw pump.
In a preferred embodiment, described lifting pump is vane pump.
Feature and the advantage of similar displacement pump relay lifting extracting device of oil of the present invention and method are: the present invention is owing to adopting the lifting pump relay lifting of same kind, lifting pump curve is identical, easily realize the pressure of lifting pump and the coupling of discharge capacity index, can overcome and adopt the depth of setting of single lifting pump and discharge capacity to be difficult to deficiency simultaneously up to standard, the discharge capacity that two kinds of different lift pump characteristic curve differences are brought or the drawback that pressure is unbalanced and energy transfer efficiency is low can be avoided again; Simultaneously, the present invention considers that the diverse location on oil pipe installs thrust bearing additional, by the original payload segment that born by rod string or all transfer on oil pipe, the danger of allowable load is exceeded with the axial tension overcoming deep well roofbolt, realize the serial connection of similar lifting equipment on the one hand, make it feasible in mining site practice of construction; On the other hand dark roofbolt load under restriction lifting equipment is shifted, overcome a difficult problem for the multiple restriction of deep-well lift-off pressures or discharge capacity or load.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of similar displacement pump relay lifting extracting device of oil of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the invention provides a kind of similar displacement pump relay lifting extracting device of oil, it comprises the multiple lifting pumps 3 be connected in series on oil pipe 1; Be connected to the ball-and-seat 12 of described oil pipe 1 bottom; Be articulated in the multiple thrust bearings 11 on described oil pipe 1; Be positioned at the sucker rod 2 of described oil pipe 1, described sucker rod 2 is connected with described multiple lifting pump 3 with described multiple thrust bearing 11 respectively.
Specifically, the lower end of oil pipe 1 is connected with ball-and-seat 12, and this ball-and-seat 12 can make the crude oil below oil pipe 1 flow in oil pipe 1, and the crude oil in oil pipe 1 can not be made to be back to shaft bottom from this ball-and-seat 12.Oil pipe 1 is mounted with multiple thrust bearing 11.
It is inner that sucker rod 2 is positioned at oil pipe 1, and it is connected with the multiple thrust bearings 11 be articulated on oil pipe 1.
Multiple lifting pump 3 is connected in series on oil pipe 1, and it has stator 32 and rotor 31, sucker rod 2 is connected in series with the rotor 31 of multiple lifting pump 3, oil pipe 1 is connected in series with the stator 32 of multiple lifting pump 3.In the present invention, this lifting pump 3 is rotary volume pump, specifically screw pump or vane pump.
For avoiding the lifting pumps such as similar screw pump due to the situation causing and burn pump that dallies, if the lifting pump 3 near well head place does not sink in liquid, need before lifting pump 3 works, certain liquid is injected in oil pipe 1, sink in liquid to make the lifting pump 3 near well head place, because oil pipe 1 lower end is connected with ball-and-seat 12, therefore the liquid injected in oil pipe 1 can not flow into shaft bottom, first liquid is injected in oil pipe 1, can prevent from opening pump initial stage or termination of pumping when opening pump again, lifting pump 3 situation causing lifting pump 3 to damage that dallies occurs; After hours to be prepared, open lifting pump 3, sucker rod 2 drives lifting pump 3 to realize the crude oil in shaft bottom to be lifted to the object on ground.
Similar displacement pump relay lifting extracting device of oil of the present invention, according to well deliverability and supply and discharge relation, determine the deeply lower of the lifting pump 3 near shaft bottom, by lifting pump 3 supercharging near shaft bottom, well fluids downhole, to moving uphole, will overcome gravity, frictional force etc. in the process of fluid flowing, fluid pressure reduces gradually, fluid supercharging after top lifting pump 3, fluid energy is supplemented, and continues to moving uphole.
Similar displacement pump relay lifting extracting device of oil of the present invention, adopt structure that the lifting pump 3 of same kind is connected in series mutually with relay lifting shaft bottom crude oil, on the one hand, the multiple lifting pumps 3 be connected in series add the lifting pressure head of fluid, make the continuous supercharging of fluid and then flow to well head; On the other hand, utilize sucker rod 2 to connect between each lifting pump 3, carry out moment of torsion transmission by sucker rod 2, the rotating speed of multiple lifting pump 3 is consistent, and the discharge capacity easily realized between lifting pump 3 and lifting pump 3 is coordinated.Meanwhile, lifting pump 3 is continuous uniform fluids, system stability, avoids the situation that sucker rod pump half way fluid causes the inharmonious instability of system.The present invention adopts lifting pump 3 of the same race to carry out series connection lifting, avoids different lift pump curve different, causes the efficiency of sacrifice wherein a kind of artificial lifting way, thus the situation causing whole efficiency low.Therefore, the present invention adopts multiple lifting pump 3 to connect lifting shaft bottom crude oil, solves the problem that single lifting pump lift is little; Adopt similar lifting pump 3 to connect lifting shaft bottom crude oil, solve the problem that inaccurate coordination and system effectiveness in compound lifting are low.
Similar displacement pump relay lifting extracting device of oil of the present invention, thrust bearing 11 is mounted with in oil pipe 1 inside, the load of sucker rod 2 is discharged on oil pipe 1, change original ground and drive lifting pump 3 times dark restrictions being subject to sucker rod 2 pulling force and moment of torsion, breach lifting pump 3 times dark restrictions by sucker rod 2.Therefore, the present invention to adopt in oil pipe 1 diverse location to install thrust bearing 11, by the original payload segment that born by sucker rod 2 roofbolt or all transfer on oil pipe 1, the dark problem by the restriction of roofbolt load under solving lifting equipment.
Embodiment two
The present invention also provides a kind of relay lifting oil production method, described relay lifting oil production method adopts the similar displacement pump relay lifting extracting device of oil of embodiment one, structure, the operating principle of described similar displacement pump relay lifting extracting device of oil are identical with embodiment one with beneficial effect, do not repeat them here.Described relay lifting oil production method comprises the steps:
A) in oil pipe 1, liquid is injected, until the lifting pump 3 near well head place on sucker rod 2 sinks in described liquid;
B) rotate sucker rod 2 drives multiple lifting pump 3 to work simultaneously, and shaft bottom crude oil is lifted to ground by multiple described lifting pump 3 by relay.
Specifically, for avoiding the lifting pumps such as similar screw pump due to the situation causing and burn pump that dallies, if the lifting pump 3 near well head place does not sink in liquid, need before lifting pump 3 works, certain liquid is injected in oil pipe 1, sink in liquid to make the lifting pump 3 near well head place, because oil pipe 1 lower end is connected with ball-and-seat 12, therefore the liquid injected in oil pipe 1 can not flow into shaft bottom, first liquid is injected in oil pipe 1, can prevent from opening pump initial stage or termination of pumping when opening pump again, lifting pump 3 situation causing lifting pump 3 to damage that dallies occurs; After hours to be prepared, open lifting pump 3, sucker rod 2 drives lifting pump 3 to realize the crude oil in shaft bottom to be lifted to the object on ground.
Relay lifting oil production method of the present invention, according to well deliverability and supply and discharge relation, determine the deeply lower of the lifting pump 3 near shaft bottom, by lifting pump 3 supercharging near shaft bottom, well fluids downhole, to moving uphole, will overcome gravity, frictional force etc. in the process of fluid flowing, fluid pressure reduces gradually, fluid supercharging after top lifting pump 3, fluid energy is supplemented, and continues to moving uphole.
Relay lifting oil production method of the present invention, adopt structure that the lifting pump 3 of same kind is connected in series mutually with relay lifting shaft bottom crude oil, on the one hand, the multiple lifting pumps 3 be connected in series add the lifting pressure head of fluid, make the continuous supercharging of fluid and then flow to well head; On the other hand, utilize sucker rod 2 to connect between each lifting pump 3, carry out moment of torsion transmission by sucker rod 2, the rotating speed of multiple lifting pump 3 is consistent, and the discharge capacity easily realized between lifting pump 3 and lifting pump 3 is coordinated.Meanwhile, lifting pump 3 is continuous uniform fluids, system stability, avoids the situation that sucker rod pump half way fluid causes the inharmonious instability of system.The present invention adopts lifting pump 3 of the same race to carry out series connection lifting, avoids different lift pump curve different, causes the efficiency of sacrifice wherein a kind of artificial lifting way, thus the situation causing whole efficiency low.Therefore, the present invention adopts multiple lifting pump 3 to connect lifting shaft bottom crude oil, solves the problem that single lifting pump lift is little; Adopt similar lifting pump 3 to connect lifting shaft bottom crude oil, solve the problem that inaccurate coordination and system effectiveness in compound lifting are low.
Relay lifting oil production method of the present invention, thrust bearing 11 is mounted with in oil pipe 1 inside, the load of sucker rod 2 is discharged on oil pipe 1, changes original ground and drive lifting pump 3 times dark restrictions being subject to sucker rod 2 pulling force and moment of torsion, breach lifting pump 3 times dark restrictions by sucker rod 2.Therefore, the present invention to adopt in oil pipe 1 diverse location to install thrust bearing 11, by the original payload segment that born by sucker rod 2 roofbolt or all transfer on oil pipe 1, the dark problem by the restriction of roofbolt load under solving lifting equipment.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.

Claims (8)

1. a similar displacement pump relay lifting extracting device of oil, it is characterized in that, it comprises the multiple lifting pumps be connected in series on oil pipe; Be connected to the ball-and-seat of described oil pipe bottom; Be articulated in the multiple thrust bearings on described oil pipe; Be positioned at the sucker rod of described oil pipe, described sucker rod is connected with described multiple lifting pump with described multiple thrust bearing respectively.
2. similar displacement pump relay lifting extracting device of oil as claimed in claim 1, it is characterized in that, described lifting pump is rotary volume pump, it has stators and rotators, described oil pipe is connected in series with the stator of multiple described lifting pump, described sucker rod is connected in series with the rotor of multiple described lifting pump.
3. similar displacement pump relay lifting extracting device of oil as claimed in claim 1 or 2, it is characterized in that, described lifting pump is screw pump.
4. similar displacement pump relay lifting extracting device of oil as claimed in claim 1 or 2, it is characterized in that, described lifting pump is vane pump.
5. a relay lifting oil production method, is characterized in that, described relay lifting oil production method adopts the similar displacement pump relay lifting extracting device of oil according to any one of claim 1-4, and described relay lifting oil production method comprises the steps:
A) in oil pipe, liquid is injected, until the lifting pump near well head place sinks in described liquid;
B) rotate sucker rod drives multiple lifting pump to work simultaneously, and shaft bottom crude oil is lifted to ground by multiple described lifting pump by relay.
6. relay lifting oil production method as claimed in claim 5, it is characterized in that, described oil pipe is mounted with multiple thrust bearing, and described thrust bearing is connected on described sucker rod.
7. the relay lifting oil production method as described in claim 5 or 6, is characterized in that, described lifting pump is screw pump.
8. the relay lifting oil production method as described in claim 5 or 6, is characterized in that, described lifting pump is vane pump.
CN201510086871.4A 2015-02-17 2015-02-17 Relay lifting oil production device and method for same type of volumetric pumps Pending CN104695910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510086871.4A CN104695910A (en) 2015-02-17 2015-02-17 Relay lifting oil production device and method for same type of volumetric pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510086871.4A CN104695910A (en) 2015-02-17 2015-02-17 Relay lifting oil production device and method for same type of volumetric pumps

Publications (1)

Publication Number Publication Date
CN104695910A true CN104695910A (en) 2015-06-10

Family

ID=53343412

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510086871.4A Pending CN104695910A (en) 2015-02-17 2015-02-17 Relay lifting oil production device and method for same type of volumetric pumps

Country Status (1)

Country Link
CN (1) CN104695910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109681424A (en) * 2018-11-21 2019-04-26 大连华科机械有限公司 Multistage-combination gear oil-well pump

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101429936A (en) * 2008-11-08 2009-05-13 中国石油大学(华东) Down-hole double-screw type oil gas multi-phase mixed pump
CN201705633U (en) * 2010-06-11 2011-01-12 中国石油天然气股份有限公司 Anti-reverse double-function electric submersible screw pump
US20120018168A1 (en) * 2009-02-10 2012-01-26 Bp Exploration Operating Company Limited Pump
CN202560172U (en) * 2012-04-09 2012-11-28 赵华 Novel screw pump oil production string apparatus
CN103075336A (en) * 2013-02-23 2013-05-01 赵润波 Self-thrust single-screw pump system
CN204113131U (en) * 2014-09-19 2015-01-21 中国石油天然气股份有限公司 A kind of coal bed gas well screw pump tubing string
CN204457675U (en) * 2015-02-17 2015-07-08 中国石油大学(北京) Similar displacement pump relay lifting extracting device of oil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101429936A (en) * 2008-11-08 2009-05-13 中国石油大学(华东) Down-hole double-screw type oil gas multi-phase mixed pump
US20120018168A1 (en) * 2009-02-10 2012-01-26 Bp Exploration Operating Company Limited Pump
CN201705633U (en) * 2010-06-11 2011-01-12 中国石油天然气股份有限公司 Anti-reverse double-function electric submersible screw pump
CN202560172U (en) * 2012-04-09 2012-11-28 赵华 Novel screw pump oil production string apparatus
CN103075336A (en) * 2013-02-23 2013-05-01 赵润波 Self-thrust single-screw pump system
CN204113131U (en) * 2014-09-19 2015-01-21 中国石油天然气股份有限公司 A kind of coal bed gas well screw pump tubing string
CN204457675U (en) * 2015-02-17 2015-07-08 中国石油大学(北京) Similar displacement pump relay lifting extracting device of oil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109681424A (en) * 2018-11-21 2019-04-26 大连华科机械有限公司 Multistage-combination gear oil-well pump

Similar Documents

Publication Publication Date Title
RU2606196C2 (en) Pump and pump section
CN102777155B (en) A kind of shale gas bridge plug subsection completion method
CN201843600U (en) SAGD (Steam Assisted Gravity Drainage) mechanical lifting circulating preheating equipment
CN2913612Y (en) Well bore enclosed type coal bed air extraction well
CN204457675U (en) Similar displacement pump relay lifting extracting device of oil
CN102767355A (en) Thick oil steam-huff-and-puff injection-production integrated oil production device
CN201218066Y (en) Down-hole decompression tool
CN204344091U (en) A kind of reacting cycle liquid drives oil-extracting screw pump
CN104695910A (en) Relay lifting oil production device and method for same type of volumetric pumps
CN201924839U (en) Primary production string
CN203161185U (en) Underground production pipe column provided with double electric pumps
RU84461U1 (en) INSTALLATION FOR SIMULTANEOUSLY SEPARATED PRODUCTION AND PUMPING THROUGH ONE WELL
CN203441440U (en) Thickened oil recovery system for horizontal well
Jiang et al. An efficient downhole oil/water-separation system with sucker-rod pump
Zejun et al. Artificial lift technique of multistage sliding vane pump used in thermal production well
CN102720663A (en) Special oil-well pump for multifunctional submersible linear motor
RU2678284C2 (en) Device for extraction of high-viscosity oil from deep wells
CN104818972A (en) Offshore thick oil heat injection and oil extraction pipe column and method
CN205477549U (en) Nearly well spacing well group single tube does not have pole hydraulic pressure pilot production device
RU163687U1 (en) STEPPED SUBMERSIBLE BRANCH-FREE ELECTRIC PUMP INSTALLATION
CN202866764U (en) Combination pump deep pumping device
CN205012973U (en) Machine pump drainage liquid gas production device
RU155750U1 (en) INTEGRATED SUBMERSIBLE BARBED ELECTRIC PUMP INSTALLATION
RU128905U1 (en) DIFFERENTIAL SUBMERSIBLE REMAINED ELECTRIC PUMP INSTALLATION FOR OIL PRODUCTION DURING JOINT AND SEPARATE OPERATION OF MULTIPLE LAYERS
AU2014408694B2 (en) Abrasion-resistant thrust ring for use with a downhole electrical submersible pump

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150610