CN1601083A - Oil production method with no pole and oil production system - Google Patents
Oil production method with no pole and oil production system Download PDFInfo
- Publication number
- CN1601083A CN1601083A CN 200410035486 CN200410035486A CN1601083A CN 1601083 A CN1601083 A CN 1601083A CN 200410035486 CN200410035486 CN 200410035486 CN 200410035486 A CN200410035486 A CN 200410035486A CN 1601083 A CN1601083 A CN 1601083A
- Authority
- CN
- China
- Prior art keywords
- pump
- oil
- power
- well head
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a rodless oil-extracting method and system used in oil industry, especially applied to pumping oil from inclined and directional wells and preventing the damage of partial wear of tubular column to the oil well. The method uses oil pump to drive the system to draw the underground crude oil. And the system includes an underground crude oil hoisting part and a under ground tubular column, using the oil pump as a ground driving device and provided a wellhead power part. A hollow polish rod connects the wellhead power part with a power output end of the oil pump to form a power hydraulic transmission channel and forms a stratum liquid producing channel by the wellhead power part connecting with the underground crude oil hoisting part. Because there is no oil pump rod under a wellhead power pump in a wellhole, it applies to oil extraction from large-slope and directional wells.
Description
Technical field
The invention belongs to the oil production method and the equipment of petroleum industry, particularly a kind of rodless pumping operation method and oil production system are applicable to various oil wells, particularly inclined shaft, directional well oil pumping, thoroughly eliminate the damage that the wearing and tearing of rod pumping pump oil recovery rod tube cause oil well.
Technical background
In petroleum industry, sucker rod pumping is topmost oil production method.The sucker-rod pumping system development time is the longest, process matching, technology maturation.The apparatus simple and durable, rate of fault is low.But be used in high moisture, take out deeply, in the inclined shaft, directional well, have that rod and tube partial-wear is serious, system effectiveness is low, be excused from a college course rapid degradation problem down of phase.Though adopted accessories such as centralizer, effect is also not obvious, does not tackle the problem at its root.Use rodless pump to recover the oil and fundamentally to solve rod pumping pump oil recovery rod tube wear problem, but also do not have a kind of technology simple at present, the rodless pumping operation equipment and the method for reliable operation.The rodless pump that adopts mainly contains hydraulic piston pump and electric submersible pump at present.Hydraulic pump system complexity, baroque kinetic pump, reversing mechanism place in the narrow and small well in down-hole simultaneously, high jig frequency, short stroke, short sealing surface operation, poor reliability.To power fluid quality requirement height, working solution, output liquid must mix in the down-hole, and ground needs huge working solution, output liquid separation system, cost of investment height, operating cost height.To shake out, gassiness, viscous crude bad adaptability.The phase of being excused from a college course is short, generally is no more than half a year.And when electric submersible pump feed flow instability, oil leak, overheated stopping production accident of burning oil-submersible motor takes place easily.Cable will be lowered in the deep-well with oil-submersible motor, pump, is easy in its process of going into the well damage.Oil-submersible motor running speed height, to containing sand, gassiness and thick oil well liquid bad adaptability, wearing and tearing easily, the phase of being excused from a college course is short.System's each several part cost height, the maintenance cost height.
Chinese patent 00212778.4 has been introduced a kind of fluid power bar pump oil extracting device.Working principle mainly is that the commutation control section of hydraulic piston pump is moved on to ground from the down-hole, thereby simplifies the down-hole pump structure.Dual-pipe parallel fluid power pipeline, underwell pump three parts that this device reaches underwell pump by liquid-supplying system, are deeply formed.The ground feed flow partly is a hydraulic workstation.Underwell pump is not to be with the conventional plunger oil well pump of changement and valve group to combine.This device can make the designs simplification of underwell pump, and power fluid is required to reduce.Its defective is influenced by technical merit, and ground hydraulic work station time between failures is short; The dual-pipe parallel fluid power pipeline that reaches underwell pump deeply realizes that difficulty is big, is lowered to and trips out difficulty, and poor reliability is difficult in the mining site practical application.Moreover underwell pump and runner thereof are still too complicated, have increased probability of failure.
Summary of the invention
The purpose of this invention is to provide a kind of rodless pumping operation method and oil production system, overcome the defective of existing rodless pumping operation technology, employing technology maturation, ground reverse flow technique and underwell pump that reliability is high are taken out technology, adopt the fluid power transferring power, prolong the well workover cycle, effectively solve the problem of rod and tube partial-wear, reduce production costs.
The present technique solution can reach above-mentioned purpose:
A kind of rodless pumping operation method drives Rodless oil extraction system by pumping unit and draws underground crude oil.
The Rodless oil extraction system that is used for said method comprises down-hole crude oil lifting part and down-hole string, as surface drive, is provided with the well head power section by pumping unit.Hollow polished rod is connected the well head power section with the clutch end of pumping unit, form the power fluid transmission channels; Hollow polished rod partly forms stratum production fluid passage by crude oil lifting under the well head power section connected well.
The present invention compares with existing rodless pumping operation technology has significant effect, the present invention combines the advantage of rod pumping system, utilize the tactic pattern and the hydraulic piston pump fluid power of conventional oil well pump to transmit working principle, the rodless pumping operation method and apparatus that the pumping unit of design drives can be in the extensive use of oil recovery field.Have following characteristics:
1, owing to below the interior well head kinetic pump of pit shaft, do not have the sucker rod movement parts, is applied to high angle hole, directional well oil recovery, thoroughly solved the rod and tube partial-wear of rod pumping system.
2, technology is simple, reliable.The pumping unit high with reliability is used as power, and need not carry out dynamic transformation, and one-time investment significantly reduces.The underwell pump structure is used for reference the high-performance conventional pumps, technology maturation, and the phase of being excused from a college course is long, can reach more than 1 year.
3, with the output liquid liquid that is used as power, needn't carry out the separation of power fluid, not increase ground flow.
4, under the same pump degree of depth down, same pump footpath and identical operating conditions, suspending point loading can reduce.Correspondingly, used pumping-unit motor power and speed reducer moment of torsion also can reduce greatly, cut down the consumption of energy.
Description of drawings
Accompanying drawing 1 is mounting structure of the present invention, working principle schematic representation.
Accompanying drawing 2 is first figure of crude oil lifting part-structure schematic representation of the present invention.
Accompanying drawing 3 is second figure of crude oil lifting part-structure schematic representation of the present invention.
Among the figure: output liquid discharge conduit 1, leakage loop 2, well head kinetic pump 3, recuperation valve 4, Big Inch 5, drain joint 6, little oil pipe 7, sleeve pipe 8, well dynamic pump 9, outlet valve 10, working pump 11, oiling valve 12, oil connection 13, suspension joint 14, well dynamic pump barrel 15, power plunger 16, urceolus 17, connection plunger 18, coupling sleeve 19, work pump barrel 20, oil pumping plunger piston assembly 21, well head sealing pair 22, hollow polished rod 23, packing box 24
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description: referring to accompanying drawing 1, a kind of rodless pumping operation method is to drive Rodless oil extraction system by pumping unit to draw underground crude oil.The power of ground pumping unit passes through liquid transfer through transformation of energy.The liquid of transferring power is the output liquid in the well among the present invention, and the liquid of transferring power also can be the fluid circulation system from ground, as the hydraulic power station system.If use ground hydraulic power station systems communicate power, need the ground power fluid be communicated with annular space between Big Inch 5 and the little oil pipe 7 at well head.Rodless oil extraction system of the present invention comprises down-hole crude oil lifting part and down-hole string, by pumping unit as surface drive.The present invention is provided with the well head power section, and the polished rod of use is hollow polished rod 23.If use solid polished rod,, can reach existing purpose equally by changing well head drain line and power fluid transmission channels.Hollow polished rod 23 is connected the well head power section with the clutch end of pumping unit, form the power fluid transmission channels; Hollow polished rod 23 partly forms stratum production fluid passage by crude oil lifting under the well head power section connected well.Hollow polished rod 23 is to be connected by the clutch end of output liquid discharge conduit 1 with hollow polished rod 23 and pumping unit with the Placement of pumping unit clutch end.The well head power section is made up of ground installation and well head power plant, ground installation is provided with output liquid discharge conduit 1, leaks loop 2 and well head black box, output liquid discharge conduit 1 is connected with the pumping unit clutch end with hollow polished rod 23, promptly is connected with the rope hanger of pumping unit.Leaking loop 2 is communicated with output liquid discharge conduit 1 and hollow polished rod 23.The effect of leakage passage is that the high voltage power liquid that well head kinetic pump 3 leaks is leaked in the discharge pipe, reduces the sealing load of packing box 24.The well head power plant have well head kinetic pump 3, recuperation valve 4 and drain joint 6, drain joint 6 and hollow polished rod 23 and little oil pipe 7 concentric installations; Well head kinetic pump 3 and recuperation valve 4 are installed in the well head kinetic pump housing, and well head kinetic pump housing lower end connects drain joint 6 and is communicated with hollow polished rod 23 and little oil pipe 7, and well head kinetic pump 3 is loaded in the space of hollow polished rod 23 and little oil pipe 7 and 6 formation of drain joint; Drain joint 6 is provided with central through bore, and the bottom internal diameter has interior chamfering, and the middle part external diameter is provided with annular recess, and the body wall on groove top is provided with a plurality of axial holes; Recuperation valve 4 is installed on the through hole of drain joint 6 body walls, the below of well head kinetic pump 3.Down-hole string comprises little oil pipe 7, Big Inch 5 and sleeve pipe 8, and little oil pipe 7 passes through the packing of oil pipe Sealing with Big Inch 5.The lower end external diameter of little oil pipe 7 is installed the little oil pipe plug connector, and the lower end of its plug connector and little oil pipe 7 is provided with radial direction through hole and is communicated with the internal diameter of little oil pipe 7, and the upper-end inner diameter of little oil pipe 7 also is provided with radial direction through hole and is communicated with well head kinetic pump 3.Crude oil lifting part in down-hole is formed by well dynamic pump 9 and working pump 11 series connection, and the link of being made up of connection plunger 18 and coupling sleeve 19 connects, and sees accompanying drawing 2 and accompanying drawing 3.The top of down-hole crude oil lifting part is installed in the little oil pipe 7, is positioned at the below of drain joint 6, and remaining part is installed in the Big Inch 5.Well dynamic pump 9 has urceolus 17, well dynamic pump barrel 15 and power plunger 16, urceolus 17 two ends connect oil connection 13 and lower contact, power plunger 16 is installed in the well dynamic pump barrel 15, and well dynamic pump barrel 15 is connected with suspension joint 14, power plunger 16 be connected plunger 18 and connect.Working pump 11 is provided with oil pumping plunger piston assembly 21, oiling valve 12, outlet valve 10 and work pump barrel 20, the valve body top of outlet valve 10 with is connected plunger 18 connections, its underpart be linked in sequence working pump inner core, oiling valve 12 and the plunger piston assembly 21 of pumping.After the well head power section is passed through hollow polished rod 23 and the clutch end of pumping unit is connected, the mechanical energy of pumping unit is transformed into the pressure energy of power fluid by well head kinetic pump 3, and the annular pass by 5 of little oil pipe 7 and Big Inch, transmission of power is arrived well dynamic pump 9.The power fluid transmission channels is to be made of the annular space between the annular space between hollow polished rod 23 and the well head kinetic pump 3, little oil pipe 7 and the Big Inch 5, oil pipe Sealing and little oil pipe 7 plug connectors.The power fluid compensation channel is to be made of little oil pipe 7, drain joint 6 and recuperation valve 4.Stratum production fluid passage is made of hollow polished rod 23 inner chambers, drain joint 6 inner chambers, little oil pipe 7 inner chambers and working pump 11, comprises power plunger 16 inner chambers, connection plunger 18 inner chambers, outlet valve 10, work pump barrel 20 and is connected the annular space between the plunger 18, pump plunger piston assembly 21 inner chambers and oiling valve 12.
During on-the-spot the use, output liquid discharge conduit 1 of the present invention is connected with hollow polished rod 23, connects the rope hanger of pumping unit on the hollow polished rod 23.Well head is by packing box 24 and 22 sealings of well head sealing pair.Extraction crude oil is from inner chamber, the inner chamber through hollow polished rod 23, the output liquid discharge conduit 1 input surface line of well head kinetic pump 3.When pumping unit is up, the plunger that drives hollow polished rod 23 and well head kinetic pump 3 is up, liquid in the compression well head kinetic pump 3 plunger epicoeles is descending along the annular chamber of down-hole string, annular power fluid passage promotion well dynamic pump 9 and working pump 11 that process little oil pipe 7 and Big Inch are 5 are up, and the liquid in the working pump 11 are given rise in the little oil pipe 7 on power plunger 16 tops.When pumping unit is descending, working pump 11 is descending under the fluid power effect that connects the formation of plunger 18 pressure at two ends differences, with power plunger 16 and connect between the plunger 18 and annular intracavity liquid along the annular chamber of concentric tube column to well head kinetic pump 3 direction reverse flow, finish the one action process.The leakage of well head power section, each sealing pair of down-hole crude oil lifting part is replenished automatically by recuperation valve 4.
When upstroke, enter power plunger 16 bottoms by the annular chamber of highly pressurised liquid between urceolus 17 and well dynamic pump barrel 15 of well head kinetic pump 3 pressurization, propulsion power plunger 16 and drive coupled connection plunger 18 and the plunger piston assembly 21 of pumping up together.When oil pumping plunger piston assembly 21 was up, the annular chamber in the compression oil pumping plunger piston assembly 21 tops work pump barrel 20 raise fluid pressure in the annular chamber and opens outlet valve 10.Withdrawal well liquid passes the inner chamber of well head kinetic pump 3 along connecting plunger 18 inner chambers, up through little oil pipe 7 inner chambers, drains into ground by hollow polished rod 23, output liquid discharge conduit 1, enters the surface gathering and transferring pipeline.
During down stroke, well head kinetic pump 3 is descending, and power fluid pressure is released, and 16 times end pressures of power plunger are reduced and reaches and power plunger 16 top balances.At this moment, be whole head of liquid owing to connect plunger 18 upper pressure, bottom pressure is producing fluid level pressure, much smaller than upper pressure.Under this differential pressure action, promote to connect plunger 18 and drive power plunger 16 descending with oil pumping plunger piston assembly 21.Annular chamber in the oil pumping plunger piston assembly 21 tops oil pumping pump barrel 20 is enlarged gradually, and oiling valve 12 is opened, and liquid enters in the annular chamber through oiling valve 12 in the well, finishes the oil-feed process.Above-mentioned repeatedly working procedure is finished no bar fluid power petroleum production engineering.
Claims (10)
1, a kind of rodless pumping operation method is characterized in that driving Rodless oil extraction system by pumping unit draws underground crude oil.
2, a kind of rodless pumping operation method according to claim 1, the power that it is characterized in that pumping unit be by liquid transfer, the liquid of transferring power be in the well output liquid or from the fluid circulation system on ground.
3, the Rodless oil extraction system that is used for claim 1 comprises down-hole crude oil lifting part and down-hole string, it is characterized in that:
A: by pumping unit as surface drive;
B: be provided with the well head power section;
C: hollow polished rod (23) is connected the well head power section with the clutch end of pumping unit, forms the power fluid transmission channels;
D: hollow polished rod (23) partly forms stratum production fluid passage by crude oil lifting under the well head power section connected well.
4, Rodless oil extraction system according to claim 3, it is characterized in that the well head power section is made up of ground installation and well head power plant, ground installation is provided with output liquid discharge conduit (1), leaks loop (2) and well head black box, output liquid discharge conduit (1) is connected with the pumping unit clutch end with hollow polished rod (23), leaks loop (2) and is communicated with output liquid discharge conduit (1) and hollow polished rod (23).
5, Rodless oil extraction system according to claim 5 is characterized in that the well head power plant have well head kinetic pump (3), recuperation valve (4) and drain joint (6), drain joint (6) and hollow polished rod (23) and the concentric installation of little oil pipe (7); Well head kinetic pump (3) and recuperation valve (4) are installed in the well head kinetic pump housing, well head kinetic pump housing lower end connects drain joint (6) and is communicated with hollow polished rod (23) and little oil pipe (7), and well head kinetic pump (3) is loaded in the space of hollow polished rod (23) and little oil pipe (7) and drain joint (6) formation; Drain joint (6) is provided with central through bore, and the bottom internal diameter has interior chamfering, and the middle part external diameter is provided with annular recess, and the body wall on groove top is provided with a plurality of axial holes; Recuperation valve (4) is installed on the through hole of drain joint (6) body wall, the below of well head kinetic pump (3).
6, Rodless oil extraction system according to claim 3, it is characterized in that down-hole string comprises little oil pipe (7), Big Inch (5) and sleeve pipe (8), little oil pipe (7) passes through the packing of oil pipe Sealing with Big Inch (5), the lower end external diameter of little oil pipe (7) is installed the little oil pipe plug connector, and the lower end of its plug connector and little oil pipe (7) is provided with radial direction through hole and is communicated with the internal diameter of little oil pipe (7); The upper-end inner diameter of little oil pipe (7) also is provided with radial direction through hole and is communicated with well head kinetic pump (3).
7, Rodless oil extraction system according to claim 3 is characterized in that down-hole crude oil lifting partly has well dynamic pump (9) and working pump (11), and the link of being made up of connection plunger (18) and coupling sleeve (19) connects; The top of down-hole crude oil lifting part is installed in the little oil pipe (7), is positioned at the below of drain joint (6), and remaining part is installed in the Big Inch (5).
8, Rodless oil extraction system according to claim 7, it is characterized in that well dynamic pump (9) has urceolus (17), well dynamic pump barrel (15) and power plunger (16), urceolus (17) two ends connect oil connection (13) and lower contact, power plunger (16) is installed in the well dynamic pump barrel (15), well dynamic pump barrel (15) is connected with suspension joint (14), power plunger (16) be connected plunger (18) and connect.
9, Rodless oil extraction system according to claim 7, it is characterized in that working pump (11) is provided with oil pumping plunger piston assembly (21), oiling valve (12), outlet valve (10) and work pump barrel (20), the valve body top of outlet valve (10) be connected plunger (18) and connect, its underpart be linked in sequence working pump inner core, oiling valve (12) and the plunger piston assembly (21) of pumping.
10, Rodless oil extraction system according to claim 3 is characterized in that the power fluid transmission channels is to be made of the annular space between hollow polished rod (23), well head kinetic pump (3), little oil pipe (7) and the Big Inch (5), oil pipe Sealing and little oil pipe 7 plug connectors; The power fluid compensation channel is to be made of little oil pipe (7), drain joint (6) and recuperation valve (4); Stratum production fluid passage is made of hollow polished rod (23), drain joint (6), little oil pipe (7), power plunger (16) and working pump (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100354869A CN100395427C (en) | 2004-07-30 | 2004-07-30 | Oil production method with no pole and oil production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100354869A CN100395427C (en) | 2004-07-30 | 2004-07-30 | Oil production method with no pole and oil production system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601083A true CN1601083A (en) | 2005-03-30 |
| CN100395427C CN100395427C (en) | 2008-06-18 |
Family
ID=34664229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100354869A Expired - Fee Related CN100395427C (en) | 2004-07-30 | 2004-07-30 | Oil production method with no pole and oil production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100395427C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672174B (en) * | 2009-10-14 | 2012-06-06 | 核工业理化工程研究院华核新技术开发公司 | Energy-saving uninterrupted non-rod oil pumping device |
| CN107630685A (en) * | 2017-09-20 | 2018-01-26 | 中国石油天然气股份有限公司 | A kind of rod-pumped well Rodless oil extraction tubing string and method |
| CN110318712A (en) * | 2019-08-08 | 2019-10-11 | 淄博东华石油技术有限公司 | A kind of dedicated underground hydraulic motor that recovers the oil |
| CN110863804A (en) * | 2019-12-02 | 2020-03-06 | 安徽物迅科技有限公司 | Oil extraction equipment |
| CN111058802A (en) * | 2019-12-12 | 2020-04-24 | 中国石油化工股份有限公司 | Gear suspension type single-well multi-pump liquid discharge balance load low-power-consumption lifting system and method |
| CN113653468A (en) * | 2021-09-01 | 2021-11-16 | 大庆丹诺石油科技开发有限公司 | Hydraulic direct-drive rodless heating oil production device in well |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050651C (en) * | 1996-01-29 | 2000-03-22 | 沈阳新阳机器制造公司 | Rod-free screw-pump oil-extraction equipment |
| US6289986B1 (en) * | 2000-02-25 | 2001-09-18 | Torque Control Systems Ltd. | Pump rod drive and torque release mechanism |
| CN1231654C (en) * | 2003-02-17 | 2005-12-14 | 北京迪威尔石油天然气技术开发有限公司 | Rod free hydraulic oil pumping system |
| CN2720147Y (en) * | 2004-07-30 | 2005-08-24 | 中国石化胜利油田有限公司采油工艺研究院 | Rod free oil-production system equipment |
-
2004
- 2004-07-30 CN CNB2004100354869A patent/CN100395427C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672174B (en) * | 2009-10-14 | 2012-06-06 | 核工业理化工程研究院华核新技术开发公司 | Energy-saving uninterrupted non-rod oil pumping device |
| CN107630685A (en) * | 2017-09-20 | 2018-01-26 | 中国石油天然气股份有限公司 | A kind of rod-pumped well Rodless oil extraction tubing string and method |
| CN110318712A (en) * | 2019-08-08 | 2019-10-11 | 淄博东华石油技术有限公司 | A kind of dedicated underground hydraulic motor that recovers the oil |
| CN110318712B (en) * | 2019-08-08 | 2024-03-15 | 淄博东华石油技术有限公司 | Underground hydraulic motor special for oil extraction |
| CN110863804A (en) * | 2019-12-02 | 2020-03-06 | 安徽物迅科技有限公司 | Oil extraction equipment |
| CN111058802A (en) * | 2019-12-12 | 2020-04-24 | 中国石油化工股份有限公司 | Gear suspension type single-well multi-pump liquid discharge balance load low-power-consumption lifting system and method |
| CN111058802B (en) * | 2019-12-12 | 2022-02-01 | 中国石油化工股份有限公司 | Gear suspension type single-well multi-pump liquid discharge balance load low-power-consumption lifting system and method |
| CN113653468A (en) * | 2021-09-01 | 2021-11-16 | 大庆丹诺石油科技开发有限公司 | Hydraulic direct-drive rodless heating oil production device in well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100395427C (en) | 2008-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10415346B2 (en) | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well | |
| US4476923A (en) | Flexible tubing production system for well installation | |
| CN102803643A (en) | Device and method for drilling with continous tool rotation and continous drilling fluid supply | |
| CN108590631B (en) | Underground pump unit and underground liquid discharge testing system | |
| CN108443126B (en) | Hydraulic piston pump, underground pump unit and underground liquid discharge testing system | |
| CA3187420A1 (en) | Rodless pump and multi-sealing hydraulic sub artificial lift system | |
| CN111734355A (en) | Underground spiral type trapezoidal sealing pump oil extraction device driven by submersible motor and process | |
| CN113790040A (en) | Oil extraction method of jet pump of series-connection type ultra-deep oil well | |
| CN100395427C (en) | Oil production method with no pole and oil production system | |
| CN2720147Y (en) | Rod free oil-production system equipment | |
| CN210598927U (en) | Special downhole hydraulic motor for oil production | |
| CN201078219Y (en) | Beam pumping unit drive type hydraulic oil pumping system without pole | |
| CN102720663A (en) | Special oil-well pump for multifunctional submersible linear motor | |
| CN211549657U (en) | Rod-type gas lift oil production device and gas drive oil well pump | |
| AU2020217565B2 (en) | Double hydraulic activated receptacle pump | |
| CN209875142U (en) | Oil-water separation system under pumping and production-injection integrated pump well | |
| CN1056436C (en) | Multiple-range oil-well pump | |
| CN2535558Y (en) | Under-pump liquid-mixing circulation oil-production apparatus for oil-pumping well | |
| RU2678284C2 (en) | Device for extraction of high-viscosity oil from deep wells | |
| CN111088966A (en) | Liquid-driving rodless water-draining gas-producing device and two-position four-way reversing valve | |
| CN205477549U (en) | Nearly well spacing well group single tube does not have pole hydraulic pressure pilot production device | |
| CN110318712B (en) | Underground hydraulic motor special for oil extraction | |
| CN2344541Y (en) | Two-tubing hydraulic power oil production equipment | |
| CN1133009C (en) | Load reducer for petroleum well | |
| CN2251617Y (en) | Obtaining oil complete sets of device by screw pump and jet 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20100730 |