CN107916910B - Independent hydraulic control packer pressure control valve - Google Patents
Independent hydraulic control packer pressure control valve Download PDFInfo
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- CN107916910B CN107916910B CN201610885077.0A CN201610885077A CN107916910B CN 107916910 B CN107916910 B CN 107916910B CN 201610885077 A CN201610885077 A CN 201610885077A CN 107916910 B CN107916910 B CN 107916910B
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- pressure relief
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 43
- 239000003921 oil Substances 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 10
- 238000011001 backwashing Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses an independent hydraulic control packer pressure control valve which comprises a central tube, an outer sleeve, a one-way valve and a pressure relief device, wherein the outer sleeve is sleeved outside the central tube in an empty mode, a hydraulic control oil flow annular space is formed between the outer sleeve and the central tube, an outer convex annular table is arranged on the outer wall of the upper end of the central tube, the upper end of the outer sleeve is connected to the outer wall of the annular table, an independent axial upper hydraulic oil channel is arranged on the annular table, an independent axial lower hydraulic oil channel is arranged at the lower end of the outer sleeve, the upper hydraulic oil channel and the lower hydraulic oil channel are both communicated with the hydraulic control oil flow annular space, a lower port of the upper hydraulic oil channel is connected with the one-way valve. According to the invention, the design of a built-in hydraulic oil uniflow body is adopted to realize the flow direction control of hydraulic oil in the hydraulic control pipeline, and the double-piston linkage design is adopted to realize the on-off control of the wall clamping cavity of the pressure control valve and the oil pipe channel, so that the requirement of underground quick pressure relief and deblocking of the offshore hydraulic control type packer is met.
Description
Technical Field
The invention relates to a downhole tool for well completion construction of an offshore water injection well, in particular to a pressure control valve of an independent hydraulic control packer.
Background
The main oil reservoir and clay group of the Chengjin island oil field on the Shengli offshore has strong heterogeneity, large pressure difference between stratum layers and easy sand production, and provides higher technical requirements for the reliability of the stratified water injection process. Meanwhile, the beach oil field is mostly developed by adopting a large-inclination directional well, the platform is narrow, the operation maintenance and subsequent test acidification costs are high, and the requirement on the long-term effect of the layered water injection process is high. The existing independent hydraulic control type separate layer water injection process has greater applicability and long-term effect in offshore water injection wells, and is implemented and applied on a large scale. The packers matched with the water injection pipe column are mainly independent hydraulic control expansion packers and independent hydraulic control compression packers, and play a role in packing oil layers and backwashing with large discharge. The working state of the underground packer is controlled mainly through a hydraulic control pipeline independent of an oil pipe, and the packer is set by pressing the hydraulic control pipeline at a well head or is unsealed by releasing pressure of the hydraulic control pipeline. And under the specific condition of hydraulic oil, the pressure regulating operation is carried out on the hydraulic control pipeline at the well head, the hydraulic oil friction resistance in the hydraulic control pipeline with the narrow drift diameter is very large under the influence of the total length of the hydraulic control pipeline, especially, the hydraulic oil pressure at the well bottom is difficult to be quickly uploaded to the well head in the pressure relief process, namely, the pressure of the hydraulic control pipeline at the well head is 0MPa, and the well packer still bears large setting pressure difference, so that the packer cannot be unlocked and the shaft well washing construction cannot be carried out. Therefore, the invention needs to invent an independent hydraulic control packer pressure control valve, which can realize the retention and isolation of hydraulic oil of a hydraulic control pipeline above the pressure control valve and the quick discharge and pressure relief of hydraulic oil of a hydraulic control pipeline below the pressure control valve during backwashing while meeting the setting state of a ground control packer, so as to complete the quick release of the underground independent hydraulic control packer and provide technical support for the efficient development and continuous stable production of the Chengisland oil field.
Disclosure of Invention
The invention aims to provide an independent hydraulic control packer pressure control valve, which adopts a built-in hydraulic oil uniflow design to realize the flow direction control of hydraulic oil in a hydraulic control pipeline, and simultaneously adopts a double-piston linkage design to realize the on-off control of a wall clamping cavity of the pressure control valve and an oil pipe channel, thereby meeting the requirement of underground quick pressure relief and deblocking of an offshore hydraulic control packer.
In order to achieve the purpose, the invention adopts the following technical scheme that the independent hydraulic control packer pressure control valve comprises a central tube, an outer sleeve, a one-way valve and a pressure relief device, wherein the outer sleeve is sleeved outside the central tube in a hollow mode, a hydraulic control oil flow annular space is formed between the outer wall of the upper end of the central tube and the outer wall of the outer sleeve, an outer convex annular table is arranged on the outer wall of the upper end of the central tube, the upper end of the outer sleeve is connected to the outer wall of the annular table, an independent axial upper hydraulic oil channel is arranged on the annular table, an independent axial lower hydraulic oil channel is arranged at the lower end of the outer sleeve, the upper hydraulic oil channel and the lower hydraulic oil channel are communicated with the hydraulic control oil flow annular space, a lower port of.
The check valve includes adapter sleeve, ball seat, steel ball, little spring housing, little spring, the port under the hydraulic oil passageway is connected through the adapter sleeve to the ball seat upper end, the ball seat has one and link up the centre bore, and the port sets up the steel ball on the ball seat centre bore, and the port internal diameter is less than the diameter of steel ball under the adapter sleeve, and the steel ball is being pushed up by the little spring of below, and little spring bottom butt is on the card platform that the ball seat centre bore lower extreme set up.
Pressure relief device includes the cylinder body, goes up piston, lower piston, the cylinder body cover forms the pressure release chamber in the center tube outside and between the center tube, the continuous inside undergauge of both sides of overcoat lower extreme forms inferior bottom reducing section and bottom reducing section, and wherein bottom reducing section and center tube sealing connection, hydraulic oil passageway is seted up on inferior bottom reducing section down, form piston chamber down between inferior bottom reducing section and the center tube, the piston sets up in piston chamber down, and the piston is connected to lower piston upper end, go up in the inside pressure release chamber of cylinder body is stretched into to the piston upper end.
The pressure relief cavity is internally provided with a large spring, the lower end of the large spring is connected with the upper piston, and the upper end of the large spring is propped against the inner step at the upper end of the cylinder body.
And a packing is arranged between the upper piston and the lower piston, and a packing pressing ring is arranged on the packing.
The secondary bottom reducing section is provided with a radial water through hole communicated with the bottom end of the lower piston cavity, and the central pipe and the lower piston are provided with oil through holes matched with each other.
The central pipe is also provided with a pressure relief hole which is communicated to the upper end of the pressure relief cavity.
Compared with the prior art, the invention has the following beneficial effects:
the invention is connected in series with a pressure control valve and each level of independent hydraulic control packer through independent hydraulic control pipelines on an offshore water injection well completion process pipe column. The pressure control valve adopts a built-in single fluid design, so that the hydraulic oil of the hydraulic control pipeline above the single fluid is kept and isolated within a designed starting pressure difference range, the midway setting abrasion of the hydraulic control packer in the process of downhole construction is avoided, and the influence of friction resistance of the hydraulic oil in the hydraulic control pipeline above the pressure control valve in the process of backwashing is eliminated; meanwhile, the design of a double-piston linkage body is adopted, the piston is pushed to move upwards by means of the annular hydraulic pressure of the oil sleeve of the backwashing well and is communicated with the oil flow discharge pressure release channel of the pressure control valve, the quick pressure release and deblocking of the underground matched packer are completed, and the time efficiency of backwashing operation is improved.
Drawings
FIG. 1 is a schematic structural diagram of an independent hydraulic control packer pressure control valve of the invention;
FIG. 2 is a schematic diagram of an offshore independent hydraulic control type separate layer water injection string.
In the figure: the device comprises a central tube 1, an outer sleeve 2, a connecting sleeve 3, a ball seat 4, a steel ball 5, a small spring 6, a small spring sleeve 7, a cylinder body 8, a large spring 9, an upper piston 10, a packing press ring 11, a packing 12 and a lower piston 13;
the system comprises a casing 14, an oil pipe 15, a hydraulic control pipeline 16, a hydraulic control valve 17, an independent hydraulic control packer 18, a water distributor 19, a well flushing valve 20 and a plug 21.
Detailed Description
The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention.
According to the figure 1, the independent hydraulic control packer pressure control valve comprises a central pipe 1, an outer sleeve 2, a single fluid and a double-piston linkage body, wherein the outer sleeve 2 is sleeved on the central pipe 1, the upper end of the outer sleeve 2 is in threaded connection with the central pipe 1, the lower end of the outer sleeve 2 is in interference sealing fit with a rubber ring of the central pipe 1, the single fluid comprises a connecting sleeve 3, a small spring sleeve 7, a steel ball 5, a ball seat 4 and a small spring 6, the double-piston linkage body comprises an upper piston 10, a lower piston 13, a large spring 9 and a cylinder body 8, the single fluid is in threaded connection with a drilling channel at the upper end of the central pipe 1, the double-piston linkage body is sleeved on the central pipe 1, and the cylinder body 8.
And the top end and the bottom end of the central pipe 1 are provided with oil pipe thread threads which are connected with oil pipe thread threads in a well completion pipe string.
The outer side of the upper end of the central tube 1 is provided with a common thread, a rubber ring groove is arranged below the thread, a rubber ring is arranged in the rubber ring groove, and the central tube 1 is in threaded connection with the upper end of the outer sleeve 2 to form interference fit with the rubber ring.
The upper end of the central pipe 1 is provided with a hydraulic oil channel, the upper part of the channel is connected with a hydraulic control pipeline through an NPT joint, and the lower part of the channel is in threaded connection with a single-fluid common buckle and internally provided with a rubber ring to form rubber ring interference fit.
And an upper water through hole and a lower oil through hole which are circumferentially and uniformly distributed are formed in the middle specific position of the central tube 1, the upper water through hole is used for discharging liquid in the cylinder body 8, and the lower oil through hole is used for being matched with the lower piston 13 oil through hole to form a hydraulic oil flow pressure relief channel.
The upper end of the outer sleeve 2 is provided with a common thread, the inner side of the lower end of the outer sleeve is provided with a rubber ring groove and a rubber ring is arranged in the rubber ring groove, and the rubber ring is in interference fit with the central tube 1.
The lower end of the outer sleeve 2 is axially drilled with a hydraulic oil channel, and the lower part of the hydraulic oil channel is connected with a hydraulic control pipeline through an NPT joint.
The lower end of the outer sleeve 2 is provided with water through holes which are circumferentially and uniformly distributed.
The connecting sleeve 3 is in threaded connection with the small spring sleeve 7 through a common buckle, and a rubber ball seat 4 is filled in a gap between the two parts.
The bottom end of the small spring sleeve 7 is provided with an axial oil through hole.
The small spring sleeve 7 is internally provided with a steel ball 5 and a small spring 6, the small spring 6 has a compression force with a designed value, and the steel ball 5 is seated in the ball seat 4 and sealed under a certain starting pressure difference so as to prevent hydraulic oil in a hydraulic control pipeline above the pressure control valve from going downwards; when the well head hydraulic control pipeline is pressed to exceed the starting pressure difference, the steel ball 5 pushes the small spring 6 to move downwards, and a hydraulic oil flow channel is opened; when the wellhead hydraulic control pipeline is depressurized, the steel ball 5 is seated in the ball seat 4 under the action of small spring force to be sealed, and a hydraulic oil ascending channel is blocked.
The upper piston 10 and the lower piston 13 are connected through threads, a T-shaped packing 12 and a packing pressing ring 11 are filled in the connecting gap of the upper piston and the lower piston, and the T-shaped packing 12 is connected and pressed through the threads.
The inner side and the outer side of the lower end of the lower piston 13 are respectively provided with two rubber ring grooves which are respectively in interference fit with the central tube 1 and the outer sleeve 2.
The upper end of the lower piston 13 is provided with an annular oil through hole, and the bottom end of the lower piston 13 is propped against the inner side of the bottom end of the outer sleeve 2.
And the inner side and the outer side of the upper end of the upper piston 10 are respectively provided with two rubber ring grooves which are respectively in interference fit with the central pipe 1 and the cylinder body 8.
And the rubber ring on the inner side of the upper piston 10 and the T-shaped packing 12 are arranged at the upper end and the lower end of the lower oil through hole of the central tube 1 during installation.
The cylinder body 8 is sleeved on the central pipe 1 and the upper piston 10, the cylinder body 8 is in threaded connection with the central pipe 1 through a common buckle, a rubber ring groove is formed in the upper portion of the threads, a rubber ring is arranged in the rubber ring groove, and the rubber ring is in interference fit with the central pipe 1.
The inner wall of the cylinder body 8 is provided with a step platform, and when the double-piston linkage body is pushed by the casing hydraulic pressure to move upwards to the step platform, the oil through hole of the lower piston 13 is kept aligned with the lower oil through hole of the central tube 1 in the radial direction.
A large spring 9 is arranged in an annular space between the cylinder body 8 and the central pipe 1, the large spring 9 has a designed value of compression force when being installed, and the bottom end of the double-piston linkage body is kept to be pressed against the inner side of the bottom end of the outer sleeve 2.
The specific use method of the invention comprises the following steps: as shown in fig. 1 and 2.
The well completion pipe column running process: during construction in an operation field, firstly, well completion tools such as a plug, a well flushing valve, each level of water distributors, each level of independent hydraulic control packer, a pressure control valve and the like are serially connected on an oil pipe according to design requirements and are sequentially put into a casing; meanwhile, each level of packer and each pressure control valve are connected in series through an NPT joint by using an independent hydraulic control pipeline until the hydraulic control pipeline is connected with a pressure gauge and a pressurizing device at a well mouth. The hydraulic oil in the hydraulic control pipeline above the hydraulic control valve is isolated by the single fluid, and the packer is prevented from being set midway when the oil pressure is transmitted downwards.
Setting the packer: the hydraulic control pipeline pressure is pressurized to a designed pressure value at the ground wellhead, when the wellhead pressure is greater than the starting pressure of the pressure control valve, the steel ball pushes the small spring to move downwards, the single-fluid oil flow channel is opened, hydraulic oil enters the packer downwards through the axial hydraulic oil channel of the outer sleeve, the packer setting is completed, and the sealing and layering effects of each oil layer are realized.
And (3) backwashing and deblocking processes: the pressure of the hydraulic control pipeline is relieved to 0MPa at the ground wellhead, the steel ball in the single-flow body of the pressure control valve is seated in the rubber ball seat for sealing, the hydraulic oil of the hydraulic control pipeline above the pressure control valve is isolated from the oil flow below the hydraulic oil, and the friction influence of the hydraulic oil above the pressure control valve is eliminated. Meanwhile, backwashing hydraulic pressure in the oil sleeve annulus enters the pressure control valve through the limber hole at the lower end of the outer sleeve to push the piston to move upwards, until the oil through hole of the lower piston is aligned with the oil through hole at the lower end of the central pipe in the radial direction, a pressure relief channel in the inflow oil pipe is communicated, high-pressure oil in the underground packer is discharged into the oil pipe through the pressure relief channel, until the hydraulic oil pressure in a hydraulic control pipeline below the pressure control valve is balanced with the hydraulic pressure in the oil pipe at the corresponding position, at the moment, the packer rubber cylinders at all levels in the well are completely unsealed, and then backwashing liquid enters the oil pipe column through the well washing valve in the well to complete large. And after the well washing is finished, the double pistons move downwards to the original positions under the elastic force of the large springs, and the pressure relief channels are closed simultaneously.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, but other equivalents may be used without departing from the spirit and scope of the invention.
Claims (3)
1. Independent pilot operated packer accuse pressure valve, its characterized in that, including center tube, overcoat, check valve, pressure relief device, the overcoat sky cover forms the pilot operated oil stream annulus between the two in the center tube outside, center tube upper end outer wall sets up the annular table of evagination, the overcoat upper end is connected at the annular table outer wall, the annular table sets up the hydraulic oil passageway in solitary axial, the hydraulic oil passageway under solitary axial is seted up to the overcoat lower extreme, go up hydraulic oil passageway, lower hydraulic oil passageway all with the annular intercommunication of pilot operated oil stream, the check valve that can only flow down is connected to port under going up hydraulic oil passageway, the center tube outer wall still is provided with pressure relief device;
the check valve comprises a connecting sleeve, a ball seat, a steel ball, a small spring sleeve and a small spring, the upper end of the ball seat is connected with the lower port of the hydraulic oil channel through the connecting sleeve, the ball seat is provided with a through central cavity, the steel ball is arranged at the upper port of the through central cavity, the inner diameter of the lower port of the connecting sleeve is smaller than the diameter of the steel ball, the steel ball is propped by the small spring below, and the bottom end of the small spring is abutted against a clamping table arranged at the lower end of the;
the pressure relief device comprises a cylinder body, an upper piston and a lower piston, the cylinder body is sleeved on the outer side of the central pipe, a pressure relief cavity is formed between the cylinder body and the central pipe, two continuous sides of the lower end of the outer sleeve are inwardly reduced in diameter to form a secondary bottom end reducing section and a bottom end reducing section, the bottom end reducing section is hermetically connected with the central pipe, the lower hydraulic oil channel is arranged on the secondary bottom end reducing section, a lower piston cavity is formed between the secondary bottom end reducing section and the central pipe, the lower piston is arranged in the lower piston cavity, the upper end of the lower piston is connected with the upper piston, and the upper end of the upper piston extends into the pressure relief cavity in the cylinder body; a packing is arranged between the upper piston and the lower piston, and a packing pressure ring is arranged on the packing; the secondary bottom reducing section is provided with a radial water through hole communicated with the bottom end of the lower piston cavity, and the central pipe and the lower piston are provided with oil through holes matched with each other.
2. The independent hydraulic control packer pressure control valve according to claim 1, wherein a large spring is arranged in the pressure relief cavity, the lower end of the large spring is connected with an upper piston, and the upper end of the large spring is propped against an inner step at the upper end of the cylinder body.
3. The independent hydraulic control packer pressure control valve according to claim 1, wherein the central pipe is further provided with a pressure relief hole communicated to an upper end position of the pressure relief cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885077.0A CN107916910B (en) | 2016-10-10 | 2016-10-10 | Independent hydraulic control packer pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885077.0A CN107916910B (en) | 2016-10-10 | 2016-10-10 | Independent hydraulic control packer pressure control valve |
Publications (2)
| Publication Number | Publication Date |
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| CN107916910A CN107916910A (en) | 2018-04-17 |
| CN107916910B true CN107916910B (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610885077.0A Active CN107916910B (en) | 2016-10-10 | 2016-10-10 | Independent hydraulic control packer pressure control valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339734B (en) * | 2018-10-23 | 2023-08-18 | 天津泊荣石油科技发展有限公司 | Packer for annular pipeline |
| CN109779569B (en) * | 2019-03-26 | 2020-01-10 | 中国石油化工股份有限公司 | Water and gas injection one-way device |
| CN113294119B (en) * | 2020-02-21 | 2023-05-26 | 中国石油天然气股份有限公司 | Packer and well completion structure |
| CN116556878B (en) * | 2023-05-24 | 2023-12-26 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4962812A (en) * | 1989-12-11 | 1990-10-16 | Baker Hughes Incorporated | Valving system for inflatable packers |
| CN2559780Y (en) * | 2002-07-10 | 2003-07-09 | 大庆油田有限责任公司 | Isolation type unpacking valve control packer |
| CN2709644Y (en) * | 2004-07-31 | 2005-07-13 | 李方明 | Hydraulic boost buffer expanding packer |
| CN2720104Y (en) * | 2004-08-13 | 2005-08-24 | 阜新市石油工具厂 | Fully-closed hydraulic packer |
| CN2784580Y (en) * | 2004-12-21 | 2006-05-31 | 中国石化胜利油田有限公司采油工艺研究院 | Hydraulic locking packer |
| CN201705254U (en) * | 2010-06-13 | 2011-01-12 | 中国石油化工股份有限公司 | Hydraulic booster for pipe string unpacking |
| CN201924870U (en) * | 2010-11-08 | 2011-08-10 | 西安鼎和新型能源有限公司 | Hydraulic setting tool |
| CN202202840U (en) * | 2011-07-15 | 2012-04-25 | 中国石油化工股份有限公司 | Double-tube safety control valve |
| CN202850934U (en) * | 2012-10-09 | 2013-04-03 | 冯小红 | Water injection separated layer packer |
| CN103206186A (en) * | 2013-03-15 | 2013-07-17 | 中国石油天然气股份有限公司 | Downhole packer based on shape memory material |
| CN203685104U (en) * | 2014-01-11 | 2014-07-02 | 中国石油化工股份有限公司 | Oil jacket safety protector |
| CN203685106U (en) * | 2014-01-11 | 2014-07-02 | 中国石油化工股份有限公司 | Hydraulic control protector |
| CN204984339U (en) * | 2015-09-02 | 2016-01-20 | 中国石油化工股份有限公司 | Sit and seal special use of oil removal layer from pressurization control ware |
| CN105804684A (en) * | 2015-11-30 | 2016-07-27 | 中国石油化工股份有限公司 | Pressure transmission underground setting and unsetting control device for hydraulic control packer |
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2016
- 2016-10-10 CN CN201610885077.0A patent/CN107916910B/en active Active
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| CN107916910A (en) | 2018-04-17 |
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