CN115306344B - Prestress packing integrated device with double channels and application method thereof - Google Patents
Prestress packing integrated device with double channels and application method thereof Download PDFInfo
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- CN115306344B CN115306344B CN202210984462.6A CN202210984462A CN115306344B CN 115306344 B CN115306344 B CN 115306344B CN 202210984462 A CN202210984462 A CN 202210984462A CN 115306344 B CN115306344 B CN 115306344B
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- pipe
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- 238000012856 packing Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 24
- 238000010168 coupling process Methods 0.000 claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 62
- 238000007789 sealing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000010779 crude oil Substances 0.000 claims description 3
- 238000005065 mining Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- 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 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
- E21B33/122—Multiple string packers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention discloses a prestress packing integrated device with two channels and a use method thereof, and relates to the technical field of oilfield underground equipment, wherein the prestress packing integrated device comprises a multistage packer, an oil outlet pipe column and a middle pipe which are connected in series, a plurality of axial oil path channels are arranged in the pipe wall of the middle pipe, and a plurality of radial bridge channels are arranged in the middle of the pipe wall; the middle pipe is connected between the two packers, the inner cavity of the middle pipe is communicated with the first channel, and the oil channel of the middle pipe is communicated with the second channel; the upper end and the lower end of the outer tube of the oil outlet tube are respectively fixedly connected with an upper coupling and a lower coupling, and the middle part of the outer tube of the oil outlet tube is provided with a plurality of radial oil holes; the inner pipe is positioned in the inner cavity of the outer pipe, and the upper end of the inner pipe is arranged on the inner wall of the upper coupling through threads; the oil outlet pipe column is arranged at the upper end of the top packer, the lower coupling of the oil outlet pipe column is in threaded connection with the upper joint of the top packer, and the inner pipe of the oil outlet pipe column is sealed and arranged at the upper end of the inner cavity oil pipe of the top packer; the device has multi-stage packer and double channels, and is suitable for oil extraction process of simultaneous injection and simultaneous production.
Description
Technical Field
The invention relates to the technical field of oilfield underground equipment, in particular to a prestress packing integrated device with double channels and a use method thereof.
Background
The packer is an important downhole tool in the development process of oil and gas fields, is used for sealing and isolating oil, gas and water layers in a casing, and is used for realizing the fields of layered exploitation, layered testing, special operation and the like, thereby realizing the processes of layered transformation, layered injection, production and the like. The packer can be divided into various types and models according to different supporting modes, setting modes, unsetting modes and the like, and is applied to different pipe columns of water injection or oil extraction and gas production wells. The tail pipe supporting type pre-stress packer is one in pre-stress stretching state, and has the advantages of avoiding spiral bending of the whole well oil pipe caused by pressure and load change, preventing eccentric wear between the oil pipe and the casing pipe, prolonging the service life of the whole pipe string and raising the pumping efficiency. However, the existing packer can only realize single-channel liquid inlet and outlet, can not circulate two liquids such as oil and water at the same time, can not be used in oil extraction processes of simultaneous injection and simultaneous production, can only be used in a single stage, and can not be used in multiple stages in the same pipe column at the same time.
Therefore, there is an urgent need to develop a dual channel pre-stressed and multi-stage utilizable packing integrated device.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a prestress packing integrated device with double channels and a using method thereof.
The technical scheme of the invention is as follows: a prestress packing integrated device with double channels comprises a packer and an oil pipe,
The packer comprises a lower joint, a central tube, an outer central tube, keys, a key sleeve, a rubber cylinder, a positioning sleeve, a breakable piece, an adjusting ring and an upper joint, wherein the outer central tube is sleeved on the outer side of the central tube in a sliding manner, the lower end of the central tube is arranged on the inner wall of the lower joint in a sliding manner, a plurality of keys are embedded in the middle of the central tube, and the upper end of the central tube is fixedly connected with the upper joint; the lower end of the outer central tube is fixedly connected with the upper part of the lower joint, the middle part of the outer central tube is provided with a plurality of axial slotted holes which are used as sliding tracks of a plurality of keys, and the upper end of the outer central tube is fixedly connected with the positioning sleeve; the key is arranged in the oblong hole in a sliding way, the outer side of the lower part of the upper joint is fixedly connected with the adjusting ring, the adjusting ring is connected with the positioning sleeve through a plurality of breakable pieces, the upper end of the key sleeve is sleeved on the outer central tube in a sliding way, and the lower end of the key sleeve is fixedly connected with the plurality of keys; the rubber barrels are sleeved on the outer central tube between the positioning sleeve and the key sleeve, and a spacing ring is arranged between the rubber barrels; when the breakable element is not broken, the key is positioned at the lower end of the oblong hole;
the oil pipe is positioned in the inner cavity of the packer, and the oil pipe and the inner cavity are coaxially arranged; the inner cavity of the oil pipe is a first channel, and the annulus between the oil pipe and the packer is a second channel.
Preferably, the breakable element is a breaking pin, and a plurality of axial grooves for installing the breaking pin are formed in the outer circumferential surface of the positioning sleeve.
Preferably, the locating sleeve is sleeved outside the central tube in a sliding manner, and a plurality of sealing rings are embedded on the inner wall of the locating sleeve; and a plurality of sealing rings are embedded in the upper part of the inner wall of the lower joint.
Preferably, the system also comprises an oil outlet pipe column and a middle pipe, wherein the packer is provided with multiple stages, and the multiple stages of the packers are connected in series up and down;
A plurality of axial oil path channels are arranged in the pipe wall of the middle pipe, and a plurality of bridge channels which are radial and communicated with the inner cavity are arranged in the middle part of the middle pipe; the middle pipe is connected between the two packers, the inner cavity of the middle pipe is communicated with the first channel of the packer, and the oil channel of the middle pipe is communicated with the second channel of the packer;
The oil outlet pipe column comprises an upper coupling, an outer pipe, an inner pipe and a lower coupling, wherein the upper end and the lower end of the outer pipe are respectively fixedly connected with the outer side of the lower part of the upper coupling and the outer side of the upper part of the lower coupling, and a plurality of radial oil holes are formed in the middle of the outer pipe; the inner pipe is positioned in the inner cavity of the outer pipe, and the upper end thread of the inner pipe is arranged on the inner wall of the upper coupling; the oil outlet pipe column is arranged at the upper end of the top packer, the lower coupling of the oil outlet pipe column is in threaded connection with the upper joint of the top packer, the inner pipe of the oil outlet pipe column is sealed and arranged at the upper end of an inner cavity oil pipe of the top packer, and correspondingly, an annulus between the outer pipe and the inner pipe is communicated with a second channel of the top packer.
Preferably, a plurality of sealing rings are embedded in the lower part of the inner wall of the inner tube.
The application method of the prestress package integrated device with the double channels comprises the following steps:
1) The bottom of the packing integrated device is connected with an anchoring device, and the packing integrated device is put into a well;
2) After the bottom anchor device is lowered to a preset position, the bottom anchor device is anchored;
3) Lifting the top of the string, thereby linking the upper joint and the central tube of each level packer, after the breakable part is broken, the central tube drives the key to move upwards along the oblong hole, and simultaneously pushes the key sleeve to upwards extrude the rubber cylinder, so that the rubber cylinder is expanded to finish setting, and the multistage packing is realized;
4) And (3) carrying out simultaneous mining operation: after oil-water is separated by the underground separator, water flows into the inner cavity of the middle pipe from the first channel from bottom to top, then flows out of the pipe string through the bridge channel and is injected into the stratum; crude oil flows into the annulus between the outer pipe and the inner pipe of the oil outlet pipe column from bottom to top through the second channel and the oil path channel, then flows out of the pipe column string through the oil through hole, and finally is extracted;
5) When the string is required to be pulled out, the top of the string is firstly lowered, so that the upper joints of the packers and the central pipe are linked, the central pipe drives the keys to descend along the oblong holes, meanwhile, the pressure of the key sleeve is relieved, the compressed rubber barrel is restored, deformation is eliminated, and the packer is separated from the inner wall of the sleeve, so that the deblocking is realized.
Compared with the prior art, the invention has the following advantages:
the device is provided with the multistage prestress packer, and can be set simultaneously, so that multistage packing is realized; the packer is conveniently and reliably sealed and unsealed by lifting and lowering an external tubular column, and adopts prestress sealing; the device has an inner channel and an outer channel, can respectively circulate two liquids such as oil, water and the like, and is suitable for oil extraction processes of simultaneous injection and simultaneous extraction.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a packer and tubing;
FIG. 3 is a schematic illustration of a set condition of a packer;
FIG. 4 is a cross-sectional view of the intermediate tube;
FIG. 5 is a schematic illustration of a semi-section of a production tubing string.
In the figure: 1. lower joint, 2, center tube, 3, outer center tube, 301, slotted hole, 4, key, 5, key bush, 6, packing element, 7, spacer ring, 8, locating sleeve, 9, breakable piece, 10, adjusting ring, 11, upper joint, 12, oil pipe, 13, first channel, 14, second channel, 15, sealing ring, 16, intermediate tube, 1601, oil circuit channel, 1602, bridge type channel, 17, upper coupling, 18, outer tube, 1801, oil through hole, 19, inner tube, 20, lower coupling.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Example 1
Referring to fig. 1-5, a pre-stressed package assembly having dual channels, including a packer and tubing 12,
The packer comprises a lower joint 1, a central tube 2, an outer central tube 3, keys 4, a key sleeve 5, a rubber cylinder 6, a positioning sleeve 8, a breakable piece 9, an adjusting ring 10 and an upper joint 11, wherein the outer central tube 3 is sleeved on the outer side of the central tube 2 in a sliding manner, the lower end of the central tube 2 is arranged on the inner wall of the lower joint 1 in a sliding manner, four keys 4 are embedded in the middle of the central tube, and the upper end of the central tube is fixedly connected with the upper joint 11; the lower end of the outer central tube 3 is fixedly connected with the upper part of the lower joint 1, the middle part of the outer central tube is provided with four axial slotted holes 301 which are used as sliding tracks of four keys 4, and the upper end of the outer central tube is fixedly connected with a positioning sleeve 8; the key 4 is arranged in the oblong hole 301 in a sliding way, the outer side of the lower part of the upper joint 11 is fixedly connected with the adjusting ring 10, the adjusting ring 10 is connected with the positioning sleeve 8 through four breakable pieces 9, the upper end of the key sleeve 5 is sleeved on the outer central tube 3 in a sliding way, and the lower end of the key sleeve is fixedly connected with the four keys 4; the plurality of rubber barrels 6 are sleeved on the outer central tube 3 between the positioning sleeve 8 and the key sleeve 5, and a spacing ring 7 is arranged between the rubber barrels 6; when the breakable member 9 is not broken, the key 4 is located at the lower end of the oblong hole 301;
The oil pipe 12 is positioned in the inner cavity of the packer, and the oil pipe 12 and the inner cavity are coaxially arranged; the inner cavity of the oil pipe 12 is a first channel 13, and the annulus between the oil pipe 12 and the packer is a second channel 14.
The packer is provided with a plurality of stages, and the plurality of stages of packers are connected in series up and down;
A plurality of axial oil passages 1601 are arranged in the pipe wall of the middle pipe 16, and a plurality of bridge passages 1602 which are radial and communicated with the inner cavity are arranged in the middle part of the middle pipe 16; the middle pipe 16 is connected between the two packers, the inner cavity of the middle pipe is communicated with the first channel 13 of the packer, and the oil channel 1601 of the middle pipe is communicated with the second channel 14 of the packer;
The oil outlet pipe column comprises an upper coupling 17, an outer pipe 18, an inner pipe 19 and a lower coupling 20, wherein the upper end and the lower end of the outer pipe 18 are respectively fixedly connected with the outer side of the lower part of the upper coupling 17 and the outer side of the upper part of the lower coupling 20, and a plurality of radial oil through holes 1801 are formed in the middle of the outer pipe; the inner pipe 19 is positioned in the inner cavity of the outer pipe 18, and the upper end of the inner pipe is arranged on the inner wall of the upper coupling 17 in a threaded manner; the oil outlet pipe column is arranged at the upper end of the top packer, the lower coupling 20 of the oil outlet pipe column is in threaded connection with the upper joint 11 of the top packer, the inner pipe 19 of the oil outlet pipe column is sealed and sleeved at the upper end of the inner cavity oil pipe 12 of the top packer, and correspondingly, the annulus between the outer pipe 18 and the inner pipe 19 is communicated with the second channel 14 of the top packer.
The using method comprises the following steps:
1) The bottom of the packing integrated device is connected with an anchoring device, and the packing integrated device is put into a well;
2) After the bottom anchor device is lowered to a preset position, the bottom anchor device is anchored;
3) Lifting the top of the string, thereby linking the upper joint 11 and the central tube 2 of each level of packer, after the breakable element 9 is broken, the central tube 2 drives the key 4 to ascend along the oblong hole 301, and simultaneously pushes the key sleeve 5 to ascend to extrude the rubber tube 6, so that the rubber tube is expanded to finish setting, and multistage packing is realized;
4) And (3) carrying out simultaneous mining operation: after oil-water is separated by the downhole separator, water flows into the inner cavity of the middle pipe 16 from the first channel 13 from bottom to top, then flows out of the pipe string through the bridge channel 1602 and is injected into the stratum; crude oil flows into the annulus between the outer pipe 18 and the inner pipe 19 of the oil outlet pipe column from bottom to top through the second channel 14 and the oil channel 1601, then flows out of the pipe column string through the oil through hole 1801, and finally is extracted;
5) When the string is required to be pulled out, the top of the string is firstly lowered, so that the upper joints 11 of the packers at all levels and the central pipe 2 are linked, the central pipe 2 drives the key 4 to descend along the oblong hole 301, meanwhile, the pressure of the key sleeve 5 is relieved, the compressed rubber cylinder 6 is restored, deformation is eliminated, and the packer is separated from the inner wall of the sleeve, so that the deblocking is realized.
The device is provided with the multistage prestress packer, and can be set simultaneously, so that multistage packing is realized; the packer is conveniently and reliably sealed and unsealed by lifting and lowering an external tubular column, and adopts prestress sealing; the device has an inner channel and an outer channel, can respectively circulate two liquids such as oil, water and the like, and is suitable for oil extraction processes of simultaneous injection and simultaneous extraction.
Example two
As a preferred embodiment of the present invention, the present embodiment optimizes the breakable element 9 on the basis of the first embodiment, specifically:
In this embodiment, the breakable element 9 is a stretch breaking pin, and four axial grooves for installing the stretch breaking pin are provided on the outer circumferential surface of the positioning sleeve 8.
When setting, the upper joint 11 is lifted up, so that the adjusting ring 10 and the central tube 2 are linked, and when the lifting tension value is large enough, the stretch-breaking pin is broken when the tensile stress born by the stretch-breaking pin is larger than the tensile limit.
Example III
As a preferred embodiment of the present invention, the present embodiment adds a multi-stage seal based on the second embodiment, specifically:
In the embodiment, the positioning sleeve 8 is sleeved outside the central tube 2 in a sliding manner, and a plurality of sealing rings 15 are embedded on the inner wall of the positioning sleeve; the upper part of the inner wall of the lower joint 1 and the lower part of the inner wall of the inner tube 19 are embedded with a plurality of sealing rings 15.
The arrangement of the multi-stage sealing ring 15 can improve the sealing performance of the device and is beneficial to prolonging the service life of the device.
The present invention is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the contents after the changes still fall within the scope of the present invention.
Claims (5)
1. The utility model provides a prestressing force seals integrated device with binary channels which characterized in that: comprises a packer and an oil pipe,
The packer comprises a lower joint, a central tube, an outer central tube, keys, a key sleeve, a rubber cylinder, a positioning sleeve, a breakable piece, an adjusting ring and an upper joint, wherein the outer central tube is sleeved on the outer side of the central tube in a sliding manner, the lower end of the central tube is arranged on the inner wall of the lower joint in a sliding manner, a plurality of keys are embedded in the middle of the central tube, and the upper end of the central tube is fixedly connected with the upper joint; the lower end of the outer central tube is fixedly connected with the upper part of the lower joint, the middle part of the outer central tube is provided with a plurality of axial slotted holes which are used as sliding tracks of a plurality of keys, and the upper end of the outer central tube is fixedly connected with the positioning sleeve; the key is arranged in the oblong hole in a sliding way, the outer side of the lower part of the upper joint is fixedly connected with the adjusting ring, the adjusting ring is connected with the positioning sleeve through a plurality of breakable pieces, the upper end of the key sleeve is sleeved on the outer central tube in a sliding way, and the lower end of the key sleeve is fixedly connected with the plurality of keys; the rubber barrels are sleeved on the outer central tube between the positioning sleeve and the key sleeve, and a spacing ring is arranged between the rubber barrels; when the breakable element is not broken, the key is positioned at the lower end of the oblong hole;
the oil pipe is positioned in the inner cavity of the packer, and the oil pipe and the inner cavity are coaxially arranged; the inner cavity of the oil pipe is a first channel, and the annulus between the oil pipe and the packer is a second channel;
The packer is provided with multiple stages, and the multiple stages of the packers are connected in series up and down;
A plurality of axial oil path channels are arranged in the pipe wall of the middle pipe, and a plurality of bridge channels which are radial and communicated with the inner cavity are arranged in the middle part of the middle pipe; the middle pipe is connected between the two packers, the inner cavity of the middle pipe is communicated with the first channel of the packer, and the oil channel of the middle pipe is communicated with the second channel of the packer;
The oil outlet pipe column comprises an upper coupling, an outer pipe, an inner pipe and a lower coupling, wherein the upper end and the lower end of the outer pipe are respectively fixedly connected with the outer side of the lower part of the upper coupling and the outer side of the upper part of the lower coupling, and a plurality of radial oil holes are formed in the middle of the outer pipe; the inner pipe is positioned in the inner cavity of the outer pipe, and the upper end thread of the inner pipe is arranged on the inner wall of the upper coupling; the oil outlet pipe column is arranged at the upper end of the top packer, the lower coupling of the oil outlet pipe column is in threaded connection with the upper joint of the top packer, the inner pipe of the oil outlet pipe column is sealed and arranged at the upper end of an inner cavity oil pipe of the top packer, and correspondingly, an annulus between the outer pipe and the inner pipe is communicated with a second channel of the top packer.
2. The pre-stressed package integrated device with dual channels of claim 1, wherein: the breakable piece is a breaking pin, and a plurality of axial grooves for installing the breaking pin are formed in the outer circular surface of the upper edge of the positioning sleeve.
3. The pre-stressed package integrated device with dual channels of claim 1, wherein: the positioning sleeve is sleeved outside the central tube in a sliding manner, and a plurality of sealing rings are embedded on the inner wall of the positioning sleeve; and a plurality of sealing rings are embedded in the upper part of the inner wall of the lower joint.
4. The pre-stressed package integrated device with dual channels of claim 1, wherein: and a plurality of sealing rings are embedded in the lower part of the inner wall of the inner tube.
5. The method for using the prestress package integrated device with double channels based on the method of claim 1, which is characterized in that: the method comprises the following steps:
1) The bottom of the packing integrated device is connected with an anchoring device, and the packing integrated device is put into a well;
2) After the bottom anchor device is lowered to a preset position, the bottom anchor device is anchored;
3) Lifting the top of the string, thereby linking the upper joint and the central tube of each level packer, after the breakable part is broken, the central tube drives the key to move upwards along the oblong hole, and simultaneously pushes the key sleeve to upwards extrude the rubber cylinder, so that the rubber cylinder is expanded to finish setting, and the multistage packing is realized;
4) And (3) carrying out simultaneous mining operation: after oil-water is separated by the underground separator, water flows into the inner cavity of the middle pipe from the first channel from bottom to top, then flows out of the pipe string through the bridge channel and is injected into the stratum; crude oil flows into the annulus between the outer pipe and the inner pipe of the oil outlet pipe column from bottom to top through the second channel and the oil path channel, then flows out of the pipe column string through the oil through hole, and finally is extracted;
5) When the string is required to be pulled out, the top of the string is firstly lowered, so that the upper joints of the packers and the central pipe are linked, the central pipe drives the keys to descend along the oblong holes, meanwhile, the pressure of the key sleeve is relieved, the compressed rubber barrel is restored, deformation is eliminated, and the packer is separated from the inner wall of the sleeve, so that the deblocking is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210984462.6A CN115306344B (en) | 2022-08-17 | 2022-08-17 | Prestress packing integrated device with double channels and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210984462.6A CN115306344B (en) | 2022-08-17 | 2022-08-17 | Prestress packing integrated device with double channels and application method thereof |
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| Publication Number | Publication Date |
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| CN115306344A CN115306344A (en) | 2022-11-08 |
| CN115306344B true CN115306344B (en) | 2024-06-14 |
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| CN202210984462.6A Active CN115306344B (en) | 2022-08-17 | 2022-08-17 | Prestress packing integrated device with double channels and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115822508A (en) * | 2023-02-10 | 2023-03-21 | 山东圣颐石油技术开发有限公司 | Multi-stage hydraulic setting co-well injection and production system pipe column |
| CN115773086A (en) * | 2023-02-10 | 2023-03-10 | 山东圣颐石油技术开发有限公司 | Upper lifting type tension setting co-well injection and production system pipe column |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206458397U (en) * | 2016-12-26 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of packer and layered water injection process pipe column for being used to be layered |
| CN112709557A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015012854A1 (en) * | 2013-07-26 | 2015-01-29 | Halliburton Energy Services, Inc. | Retrieval of compressed packers from a wellbore |
| CN111485849A (en) * | 2019-01-25 | 2020-08-04 | 中国石油化工股份有限公司 | Casing hydraulic packer |
| CN213331008U (en) * | 2020-09-15 | 2021-06-01 | 新疆康和达石油技术服务有限公司 | Mechanical self-checking packer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206458397U (en) * | 2016-12-26 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of packer and layered water injection process pipe column for being used to be layered |
| CN112709557A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Safe and long-acting water injection string for offshore oil field and construction method |
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