CN108999589A - A kind of workover treatment downhole blow-out preventer - Google Patents
A kind of workover treatment downhole blow-out preventer Download PDFInfo
- Publication number
- CN108999589A CN108999589A CN201810839145.9A CN201810839145A CN108999589A CN 108999589 A CN108999589 A CN 108999589A CN 201810839145 A CN201810839145 A CN 201810839145A CN 108999589 A CN108999589 A CN 108999589A
- Authority
- CN
- China
- Prior art keywords
- pipe nipple
- throw
- pipe
- fitting
- sliding sleeve
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Abstract
The present invention relates to petroleum equipment fields, in particular for one of workover treatment process Underwell anti-injection tool.It include: top connection, upper pipe nipple, thrust fitting, pressure-bearing shear pin, sliding sleeve, upper throw-out collar, lower throw-out collar, lower pipe nipple, upper valve base, valve ball, lower valve base, preloading spring, center pipe fitting, central tube, back ring group I, packing element, back ring group II, torque cylinder, lower contact.Top connection passes through regular screw threads with lower pipe nipple with lower contact, lower throw-out collar with sliding sleeve, lower pipe nipple with upper pipe nipple, upper pipe nipple and connect；Torque cylinder top is connected through a screw thread with sliding sleeve, and lower part is connect with lower pipe nipple by spline；Thrust fitting passes through API pipe screw thread with lower pipe nipple with central tube, central tube with center pipe fitting, center pipe fitting and connect；Valve ball is equipped with preloading spring between upper valve base and lower valve base between lower valve base and thrust fitting；It is relatively fixed by the realization of pressure-bearing shear pin between sliding sleeve and center pipe fitting.The present invention realizes in well workover engineering and carries out blowout prevention movement in shaft bottom at any time；It can realize in tubing string and throttle while realizing annular space blowout prevention.
Description
Technical field
The present invention relates to petroleum equipment fields, in particular for one of workover treatment process Underwell anti-injection tool.
Background technique
As oil-gas mining enters the middle and later periods, tool or oil well itself will appear a series of problems and cause to recover the oil in well
Pause, and the solution of these problems needs professional well workover team to carry out.During workover operation construction team carries out well workover, by
, gas-oil ratio height relatively strong in some oil wells self-spray ability or some oil wells needs are taken and mend the measures such as layer perforation, acid fracturing, institute
Well killing fluid will be used to carry out kill-job before starting overhaul with oil well, pressure in annular space and tubing string is made to be greater than strata pressure,
To avoid the generation of the blowout in workover treatment.But in this operation mode as well workover pipe string constantly rises out, on the one hand
Partially liq can be carried over pit shaft, and the space in another aspect oil well constantly increases, so as to cause height of the well killing fluid in pit shaft
Degree reduces, so that the head of liquid in well reduces, finally causes blowout.Due to taken in operation benefit layer perforation, acidification blowout
Measure will increase new stratum energy, when bottom pressure is greater than kill-job head of liquid, if control measure cannot be taken in time
Gas blowout accident will occur.Due to the generation of gas blowout accident, oil field can lose a large amount of property and resource, and the well workover on well
Operation worker is also faced with life danger.In recent years, each well workover company also identifies kill-job operation and has much unavoidably
Defect, it is such as at high cost, the time is long, causes the destruction of reservoir and reservoir pollution, influences subsequent oil producing operation, causes to take two
Subjob expense etc..With the promotion of technical level, the well workover mode of Operating Pressure slowly grows up in oil field.This work
The advantage that industry mode is protruded by it is gradually replacing the operation mode of well killing fluid kill-job and the operator of open flow overflow decompression
Formula.But the well workover mode pair of this Operating Pressure and well control technique have higher requirement.
Summary of the invention
Present invention seek to address that the problem of mentioning in background technique, the invention proposes a kind of workover treatment Underwell anti-injections
Device can replace similar product belonging to patent at this stage, and the technical scheme adopted is as follows:
A kind of workover treatment downhole blow-out preventer, comprising: top connection, upper pipe nipple, thrust fitting, pressure-bearing shear pin, sliding sleeve above push away
Ring, lower throw-out collar, lower pipe nipple, upper valve base, valve ball, lower valve base, preloading spring, center pipe fitting, central tube, back ring group I, packing element,
Back ring group II, torque cylinder, lower contact.Entire tool is by being located at the top connection of upper tool part and the lower contact for being located at tool lower portion
It is installed on well workover pipe string, top connection passes through API pipe screw thread with lower contact with well workover pipe string and connect；Top connection and upper pipe nipple,
Upper pipe nipple passes through regular screw threads with lower pipe nipple with lower contact, lower throw-out collar with sliding sleeve, lower pipe nipple and connect；Torque cylinder top and sliding sleeve
It is connected through a screw thread, lower part is connect with lower pipe nipple by spline；Thrust fitting and center pipe fitting, center pipe fitting and center
Pipe, central tube pass through API pipe screw thread with lower pipe nipple and connect；Valve ball is between upper valve base and lower valve base, lower valve base and thrust
Preloading spring is housed between connector；It is relatively fixed by the realization of pressure-bearing shear pin between sliding sleeve and center pipe fitting；Upper throw-out collar, glue
Cylinder, lower throw-out collar are mounted on from top to bottom between sliding sleeve and lower pipe nipple；Back ring group I is between upper throw-out collar and packing element, back ring group II
Between packing element and lower throw-out collar.
The present invention has the advantage that realizing in well workover engineering and carrying out blowout prevention movement in shaft bottom at any time；Realizing annular space
Throttling in tubing string can be realized while blowout prevention.
Detailed description of the invention
Fig. 1 is internal structure chart of the present invention
In figure: 1. top connections, pipe nipple on 2., 3. thrust fittings, 4. pressure-bearing shear pins, 5. sliding sleeves, throw-out collar on 6. push away under 7.
Ring, 8. lower pipe nipples, 9. upper valve bases, 10. valve balls, 11. lower valve bases, 12. preloading springs, 13. center pipe fittings, 14. heart pipes, 15.
Back ring group I, 16. packing elements, 17. back ring groups II, 18. torque cylinders, 19. lower contacts.
Fig. 2 appearance assumption diagram of the present invention
In figure: 1. top connections, pipe nipple on 2., 4. pressure-bearing shear pins, 5. sliding sleeves, throw-out collar on 6., 7. lower throw-out collars, 8. lower pipe nipples,
15. back ring group I, 16. packing elements, 17. back ring groups II, 19. lower contacts.
Fig. 3 internal restriction valve arrangement figure
3. thrust fitting, 9. upper valve bases, 10. valve balls, 11. lower valve bases.
Fig. 4 ball valve valve ball structure figure
Fig. 5 thrust fitting structure chart
Specific embodiment
The invention will be further described with example with reference to the accompanying drawing:
As Figure 1-Figure 5, a kind of workover treatment downhole blow-out preventer, comprising: top connection 1, upper pipe nipple 2, thrust fitting 3,
Pressure-bearing shear pin 4, sliding sleeve 5, upper throw-out collar 6, lower throw-out collar 7, lower pipe nipple 8, upper valve base 9, valve ball 10, lower valve base 11, preloading spring 12, in
Heart pipe fitting 13, central tube 14, back ring group I 15, packing element 16, back ring group II 17, torque cylinder 18, lower contact 19.Entire tool is logical
The top connection 1 crossed positioned at upper tool part is installed on well workover pipe string with the lower contact 19 for being located at tool lower portion, and top connection 1 connects under
First 19, which pass through API pipe screw thread with well workover pipe string, connect, and in oil/gas well when pressure oscillation without exception, tool is normal as one section
Tubing string transmitting pressure and torque, guarantee being normally carried out for well-repairing work；Top connection 1 and upper pipe nipple 2, upper pipe nipple 2 and sliding sleeve
5, lower pipe nipple 8 is connect by regular screw threads with lower contact 19, lower throw-out collar 7 with lower pipe nipple 8；18 top of torque cylinder and sliding sleeve 5 are logical
Threaded connection is crossed, 18 lower part of torque cylinder is machined with rectangular spline and lower 8 inner rectangular keyway of pipe nipple cooperates, torque cylinder main function
It is to transmit the torque from top；Thrust fitting 3 and center pipe fitting 13, center pipe fitting 13 and central tube 14, central tube 14
It is connect by API pipe screw thread with lower pipe nipple 8；Between upper valve base 9 and lower valve base 11, lower valve base 11 connects valve ball 10 with thrust
Preloading spring 12 is housed, under the action of preloading spring 12, lower valve base 11 compresses valve ball 10 and realizes sealing between first 3；Valve ball 10
On be machined with minor diameter runner a and major diameter runner b and slot c, straight pin d is welded on thrust fitting 3, on thrust fitting 3
The transform linear motion of thrust fitting 3 can be the rotary motion of valve ball 10 by straight pin d and 10 slot c of valve ball cooperation, and realization is not required to
It wants 10 major diameter runner b of valve ball when blowout prevention to connect, 10 minor diameter runner a of valve ball when blowout prevention is needed to connect；Sliding sleeve 5 connects with central tube
Realized by pressure-bearing shear pin 4 relatively fixed between first 13, logical pressure-bearing shear pin 4 between sliding sleeve 5 and center pipe fitting 13 for passing
Pass pressure；Upper throw-out collar 6, packing element 16, lower throw-out collar 7 are mounted on from top to bottom between sliding sleeve 5 and lower pipe nipple 8, and packing element 16 can be in well
Expansion, which is set, when inside there is severe stress fluctuation realizes annular space blowout prevention；Back ring group I 15 is between upper throw-out collar 6 and packing element 16, back
Ring group II 17 is located between packing element 16 and lower throw-out collar 7, and back ring group I 15 and back ring group II 17 prevent from going out in 16 compression-expansion formula of packing element
Existing serious rheological phenomena.
A kind of working principle of above-mentioned bitubular hydraulic cylinder type fractured horizontal well ball injector is as follows:
In oil/gas well when pressure oscillation without exception, tool is protected as one section of normal tubing string transmitting pressure and torque
Card well-repairing work is normally carried out.The pressure of well head is along top connection 1, upper pipe nipple 2, sliding sleeve 5, pressure-bearing shear pin 4, center pipe fitting
13, central tube 14, lower pipe nipple 8, lower contact transmitting；The torque of well head along top connection 1, upper pipe nipple 2, sliding sleeve 5, torque cylinder 18, under
Connector 19 transmits.
During well workover, when there is serious overflow or even well kick in discovery well, well head is downwardly applied to pressure, works as pressure value
When greater than pressure-bearing 4 safe load of shear pin, pressure-bearing shear pin 4 is cut by sliding sleeve 5, and sliding sleeve 5 drives upper throw-out collar 6 to compress packing element 16 and realizes ring
Sky is set, and the packing element 16 after expansion blocks annular fluid channel, and annular space blowout prevention is completed；In 16 setting process of packing element, top connection
1, upper pipe nipple 2, sliding sleeve 5 are moved downward relative to thrust fitting 3, center pipe fitting 13, central tube, to push upper valve base 9, valve
Ball 10, lower valve base 11 are moved downward relative to thrust fitting 3, and the straight pin d on thrust fitting 3 is moved relative to 10 slot c of valve ball,
It realizes that valve ball 10 rotates 90 °, has minor diameter runner a connection at this time, realize tubing string internal restriction.
Claims (1)
1. a kind of workover treatment downhole blow-out preventer characterized by comprising top connection (1), upper pipe nipple (2), thrust fitting (3),
Pressure-bearing shear pin (4), sliding sleeve (5), upper throw-out collar (6), lower throw-out collar (7), lower pipe nipple (8), upper valve base (9), valve ball (10), lower valve base
(11), preloading spring (12), center pipe fitting (13), central tube (14), back ring group I (15), packing element (16), back ring group II
(17), torque cylinder (18), lower contact (19), entire tool is by being located at the top connection (1) of upper tool part and being located at tool lower portion
Lower contact (19) be installed on well workover pipe string, top connection (1) passes through API pipe screw thread with well workover pipe string with lower contact (19) and connects
Connect, top connection (1) and upper pipe nipple (2), upper pipe nipple (2) and sliding sleeve (5), lower pipe nipple (8) and lower contact (19), lower throw-out collar (7) with
Lower pipe nipple (8) is connected by regular screw threads；Torque cylinder (18) top is connected through a screw thread with sliding sleeve (5), under torque cylinder (18)
Portion is machined with rectangular spline and lower pipe nipple (8) inner rectangular keyway cooperates, thrust fitting (3 and center pipe fitting (13), central tube
Connector (13) is connect by API pipe screw thread with central tube (14), central tube (14) with lower pipe nipple (8), and valve ball (10) is located at upper
Between valve seat (9) and lower valve base (11), between lower valve base (11) and thrust fitting (3) equipped with preloading spring (12, sliding sleeve (5) with
Relatively fixed by pressure-bearing shear pin (4) realization between center pipe fitting (13), upper throw-out collar (6), packing element (16), lower throw-out collar (7) are certainly
It is mounted between sliding sleeve (5) and lower pipe nipple (8) under above, back ring group I (15) is between upper throw-out collar (6) and packing element (16), back
Ring group II (17) is located between packing element (16) and lower throw-out collar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839145.9A CN108999589B (en) | 2018-07-26 | 2018-07-26 | Downhole blowout preventer for workover operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839145.9A CN108999589B (en) | 2018-07-26 | 2018-07-26 | Downhole blowout preventer for workover operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999589A true CN108999589A (en) | 2018-12-14 |
| CN108999589B CN108999589B (en) | 2021-11-23 |
Family
ID=64597227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810839145.9A Active CN108999589B (en) | 2018-07-26 | 2018-07-26 | Downhole blowout preventer for workover operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108999589B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107436A (en) * | 2021-04-29 | 2021-07-13 | 南方海洋科学与工程广东省实验室(湛江) | Underground self-locking safety valve for deep-sea natural gas hydrate double-layer pipe exploitation |
| CN113445962A (en) * | 2021-06-24 | 2021-09-28 | 西南石油大学 | Hydraulic double-layer pipe double-gradient downhole blowout prevention valve |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3830297A (en) * | 1973-01-08 | 1974-08-20 | Baker Oil Tools Inc | Sub-surface safety valve with improved balancing valve means |
| CA965698A (en) * | 1972-03-20 | 1975-04-08 | Delbert L. Hudson | Subsurface safety valve |
| US4042024A (en) * | 1975-05-23 | 1977-08-16 | Hydril Company | Subsurface well apparatus having flexing means and method of using same |
| EP0376502A2 (en) * | 1988-12-30 | 1990-07-04 | Neles-Jamesbury Oy | Method for changing the characteristic curve of a regulation valve under pressure and a regulation valve |
| CA2172477A1 (en) * | 1996-03-22 | 1997-09-23 | Clarence William Johnson | Dump/stop valve for surface controller subsurface safety valve |
| CN101285532A (en) * | 2008-05-19 | 2008-10-15 | 浙江沃尔达铜业有限公司 | Multi-gear valve |
| CN201373133Y (en) * | 2009-03-13 | 2009-12-30 | 沃茨阀门(宁波)有限公司 | Ball valve with valve position alarming function |
| CN101737019A (en) * | 2009-12-02 | 2010-06-16 | 于海涛 | Release packer capable of well-flushing |
| CN101936145A (en) * | 2010-09-06 | 2011-01-05 | 中国海洋石油总公司 | Ball valve type oil reservoir protective valve and operation method thereof |
| CN201843563U (en) * | 2010-05-20 | 2011-05-25 | 西南石油大学 | Mechanical downhole inner and outer integrated blowout preventer |
| CN102235158A (en) * | 2011-05-26 | 2011-11-09 | 西南石油大学 | Underground annular blowout preventer and assembly process thereof |
| CN204386557U (en) * | 2015-01-08 | 2015-06-10 | 宝鸡市元亨石油设备有限责任公司 | RD downhole choke valve |
| CN204754856U (en) * | 2015-06-24 | 2015-11-11 | 中国石油化工股份有限公司 | Manual -automatic preventer locking device |
| US20150345251A1 (en) * | 2012-10-23 | 2015-12-03 | M-I L.L.C. | Mechanical shaft coupling for fluid system connections |
| CN105781488A (en) * | 2016-05-01 | 2016-07-20 | 徐光武 | Small-diameter constant-pressure throttling device for water injection well |
| US20160237797A1 (en) * | 2009-04-24 | 2016-08-18 | Chevron U.S.A. Inc. | Blapper valve tools and related methods |
| CN206360677U (en) * | 2017-01-05 | 2017-07-28 | 中国石油大学(华东) | A kind of downhole blow-out preventer |
| CN206581918U (en) * | 2017-03-10 | 2017-10-24 | 西南石油大学 | One kind seals by force anti-shoulder formula compression packer |
-
2018
- 2018-07-26 CN CN201810839145.9A patent/CN108999589B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA965698A (en) * | 1972-03-20 | 1975-04-08 | Delbert L. Hudson | Subsurface safety valve |
| US3830297A (en) * | 1973-01-08 | 1974-08-20 | Baker Oil Tools Inc | Sub-surface safety valve with improved balancing valve means |
| US4042024A (en) * | 1975-05-23 | 1977-08-16 | Hydril Company | Subsurface well apparatus having flexing means and method of using same |
| EP0376502A2 (en) * | 1988-12-30 | 1990-07-04 | Neles-Jamesbury Oy | Method for changing the characteristic curve of a regulation valve under pressure and a regulation valve |
| CA2172477A1 (en) * | 1996-03-22 | 1997-09-23 | Clarence William Johnson | Dump/stop valve for surface controller subsurface safety valve |
| CN101285532A (en) * | 2008-05-19 | 2008-10-15 | 浙江沃尔达铜业有限公司 | Multi-gear valve |
| CN201373133Y (en) * | 2009-03-13 | 2009-12-30 | 沃茨阀门(宁波)有限公司 | Ball valve with valve position alarming function |
| US20160237797A1 (en) * | 2009-04-24 | 2016-08-18 | Chevron U.S.A. Inc. | Blapper valve tools and related methods |
| CN101737019A (en) * | 2009-12-02 | 2010-06-16 | 于海涛 | Release packer capable of well-flushing |
| CN201843563U (en) * | 2010-05-20 | 2011-05-25 | 西南石油大学 | Mechanical downhole inner and outer integrated blowout preventer |
| CN101936145A (en) * | 2010-09-06 | 2011-01-05 | 中国海洋石油总公司 | Ball valve type oil reservoir protective valve and operation method thereof |
| US20130153796A1 (en) * | 2011-05-26 | 2013-06-20 | Southwest Petroleum University | Underground Annular Blowout Preventer and Assembly Process Thereof |
| CN102235158A (en) * | 2011-05-26 | 2011-11-09 | 西南石油大学 | Underground annular blowout preventer and assembly process thereof |
| US20150345251A1 (en) * | 2012-10-23 | 2015-12-03 | M-I L.L.C. | Mechanical shaft coupling for fluid system connections |
| CN204386557U (en) * | 2015-01-08 | 2015-06-10 | 宝鸡市元亨石油设备有限责任公司 | RD downhole choke valve |
| CN204754856U (en) * | 2015-06-24 | 2015-11-11 | 中国石油化工股份有限公司 | Manual -automatic preventer locking device |
| CN105781488A (en) * | 2016-05-01 | 2016-07-20 | 徐光武 | Small-diameter constant-pressure throttling device for water injection well |
| CN206360677U (en) * | 2017-01-05 | 2017-07-28 | 中国石油大学(华东) | A kind of downhole blow-out preventer |
| CN206581918U (en) * | 2017-03-10 | 2017-10-24 | 西南石油大学 | One kind seals by force anti-shoulder formula compression packer |
Non-Patent Citations (5)
| Title |
|---|
| 吴瑞东等: "作业井控环保配套技术分析及应用", 《化工管理》 * |
| 杨祥祥等: "一种新型压裂喷砂器的设计", 《中国石油和化工标准与质量》 * |
| 赵久良: "自动防喷反压装置的研制", 《煤炭技术》 * |
| 黄德明等: "海上稠油热采注采一体化井下防喷安全阀泵研制", 《中国石油和化工标准与质量》 * |
| 黎伟等: "井下防喷器的设计及实验研究", 《工程设计学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107436A (en) * | 2021-04-29 | 2021-07-13 | 南方海洋科学与工程广东省实验室(湛江) | Underground self-locking safety valve for deep-sea natural gas hydrate double-layer pipe exploitation |
| CN113107436B (en) * | 2021-04-29 | 2022-04-08 | 南方海洋科学与工程广东省实验室(湛江) | Underground self-locking safety valve for deep-sea natural gas hydrate double-layer pipe exploitation |
| CN113445962A (en) * | 2021-06-24 | 2021-09-28 | 西南石油大学 | Hydraulic double-layer pipe double-gradient downhole blowout prevention valve |
| CN113445962B (en) * | 2021-06-24 | 2022-05-31 | 西南石油大学 | Hydraulic double-layer pipe double-gradient downhole blowout prevention valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108999589B (en) | 2021-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3411576A (en) | Well tools | |
| CN204060661U (en) | A kind of coiled tubing multistage fracturing tool tubing string | |
| CN202181876U (en) | Drilling type composite bridge plug | |
| CN104563998A (en) | Multistage fracturing tool pipe column of continuous oil pipe and construction method | |
| CN103397863B (en) | Double acting compression packer and using method thereof | |
| CN207437005U (en) | Band centering edge formula delayed start-up well cementation sliding sleeve | |
| CN201074502Y (en) | Dual-valve plate type subsurface safety valve | |
| CN204040996U (en) | Smart well passes through formula packer | |
| CN107013190A (en) | Steam flooding well flow string and implementation | |
| CN108999589A (en) | A kind of workover treatment downhole blow-out preventer | |
| CN205778702U (en) | A kind of have the Y111 type compression packer setting startup lock function | |
| CN101824973A (en) | Oil-swelling self-packing packer | |
| CN107605424A (en) | From compression high temperature downhole packer | |
| CN103061733B (en) | Sleeve valve type fracturing production-increasing tool | |
| USRE27464E (en) | Well tools | |
| CN109139099B (en) | Filling, sand prevention and steam injection integrated device and operation method thereof | |
| CN107091060B (en) | Multi-stage water power pressurizer based on mechanical device | |
| CN110513070B (en) | Flap type downhole oil pipe hydraulic control blowout preventer | |
| RU2513896C1 (en) | Method of dual operation of two strata with one well | |
| CN105317394A (en) | High-temperature-resistant and high-pressure-bearing packer special for oil drilling | |
| CN205445548U (en) | Outer sliding sleeve formula hydraulic pressure bleeder | |
| CN104019030B (en) | A kind of reacting cycle liquid drives the discharge device of oil pumping screw pump | |
| CN207004473U (en) | A kind of twin-tub compensative hot producing packer | |
| CN203808923U (en) | Suspension releasing packer for oil-gas water well | |
| CN212429122U (en) | Underground double-pump barrel preset oil well pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |