CN114646458B - Downhole packer performance testing device and method - Google Patents
Downhole packer performance testing device and method Download PDFInfo
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- CN114646458B CN114646458B CN202011492490.3A CN202011492490A CN114646458B CN 114646458 B CN114646458 B CN 114646458B CN 202011492490 A CN202011492490 A CN 202011492490A CN 114646458 B CN114646458 B CN 114646458B
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- pressure
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- nipple
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title description 11
- 210000002445 nipple Anatomy 0.000 claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a performance testing device of an underground packer, which comprises a test tube string connected with a drilling tool, wherein the test tube string comprises: a packer set at a pressure; the circulating nipple is arranged below the packer, is started under a certain pressure and establishes a circulating channel inside and outside the test tube string; the pressure-holding mechanism is arranged below the circulating short section and is configured to be started and then can seal the inside of the test tube string to hold pressure above the test tube string; after the pressure holding mechanism is started, the pressure is held in the test tube string, and when the pressure is increased to a certain value, the packer is set in the annular space between the test tube string and the well wall; and after the pressure is continuously increased, the circulation nipple is opened, circulation is established below the packer, and the pressure in the drilling tool is measured to obtain the seal checking pressure at the lower part of the packer.
Description
Technical Field
The invention relates to a performance testing device and method for an underground packer, and belongs to the field of testing of drilling devices of oil and gas fields.
Background
The downhole blowout preventer is connected with the drilling tool and rotates along with the drilling tool, the downhole blowout preventer can be matched with the wellhead blowout preventer to treat downhole overflow, the downhole blowout preventer packer unit adopts an expansion type structure to meet the annular sealing requirement with a large expansion ratio, because large extrusion deformation and upward displacement occur in the packer setting process, the shoulder protection structure is designed at the upper end of the packer rubber cylinder, the packer shoulder protection adopts a metal plastic material with good ductility and is designed into a sawtooth structure, the shoulder protection is deformed to be clung to the well wall in the packer expanding process, the friction force between the packer and the well wall is increased, the opening of the deformed shoulder protection faces the rubber cylinder, the rubber cylinder is prevented from being damaged by annular high pressure at the lower part, and the shoulder protection of the lifting pipe column is contracted when the packer is unsealed. Because conventional packer well logging test is limited by a shaft structure and can only realize upper annular pressure test, the working state of a packer cannot be truly tested, and the packer is easily unsealed due to the fact that the upper annular pressure test of an up-lifting unsealing packer is easy, the conventional packer upper annular pressure test method cannot verify the function of a shoulder pad, the packer is easily unsealed, ground test is usually carried out, and the function of a downhole blowout preventer cannot be fully verified.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a downhole packer performance testing device and method, which can realize in-pipe setting and test the packing performance of the lower annular space of the packer after setting.
In one aspect of the present invention, a downhole packer performance testing apparatus is provided, comprising:
a test string for connecting a drilling tool, the test string comprising:
A packer set at a pressure;
The circulating nipple is arranged below the packer, is started under a certain pressure and establishes a circulating channel inside and outside the test tube string; and
The pressure holding mechanism is arranged below the circulating nipple and is configured to be started and then can seal the inside of the test tube string to hold pressure above the test tube string;
After the pressure holding mechanism is started, the pressure is held in the test tube string, and when the pressure is increased to a certain value, the packer is set in the annular space between the test tube string and the well wall; and after the pressure is continuously increased, the circulation nipple is opened, circulation is established below the packer, and the pressure in the drilling tool is measured to obtain the seal checking pressure at the lower part of the packer.
The invention further improves that the packer comprises a central pipe connected to the drilling tool, and a packer shell is arranged on the outer side of the central pipe; a rubber cylinder is arranged on the packer shell;
The central tube is provided with pressure transmission holes along the radial direction, and the pressure transmission holes are communicated with the inside of the central tube and the inner side of the rubber cylinder; the pressure in the central tube is transmitted to the inner side of the rubber cylinder through the pressure transmission hole, and the rubber cylinder is pushed to expand and seal through the pressure.
The invention is further improved in that the pressure transmission hole is arranged at the upper part of the central pipe, and a flow passage is arranged between the central pipe and the packer shell; the pressure transmission hole is connected with the inner side of the rubber cylinder through a runner.
The invention is further improved in that a one-way valve is arranged in the pressure transmission hole, and liquid enters the flow passage from the central pipe through the one-way valve;
the lower part of the central tube is provided with a pressure relief hole; the pressure relief hole is arranged below the rubber cylinder and the flow channel; after setting, the pressure relief hole is moved to the position of the rubber cylinder by lifting the test tube string, and the rubber cylinder is depressurized through the pressure relief hole.
The invention is further improved in that the circulating nipple comprises a circulating nipple body, a circulating hole is formed in the outer wall of the circulating nipple body, and a differential pressure sliding sleeve is arranged in the circulating nipple body;
wherein, in the initial state, the differential pressure sliding sleeve is positioned at a first position and seals the circulation hole; the differential pressure slide is capable of moving to a second position within the recirculating nipple body under the influence of pressure and causing the recirculating orifice to open.
The invention is further improved in that the upper end face of the differential pressure sliding sleeve is provided with an annular differential pressure face, and the differential pressure sliding sleeve is connected with the circulating nipple body through a shear pin when in a first position.
The circulating nipple is further improved in that an inner limit step is arranged on the inner side of the circulating nipple body, an outer limit step is arranged on the outer wall of the differential pressure sliding sleeve, and when the differential pressure sliding sleeve moves to a second position, the inner limit step is in butt joint fit with the outer limit step.
The invention is further improved in that a plurality of sealing rings are arranged between the outer walls of the two ends of the differential pressure sliding sleeve and the inner wall of the circulating nipple body.
According to the invention, the pressure-holding mechanism comprises a ball seat, and after the pressure-holding ball is put into the ball seat, the pressure-holding ball is clamped on the ball seat, so that the inside of the test tube string is blocked, and the upper part of the test tube string is held.
According to another aspect of the present invention, there is also provided a method for testing performance of a downhole packer, comprising:
assembling the downhole packer performance testing device;
putting a pressure-building ball into the packer to build pressure of the pressure-building mechanism, setting the packer when the pressure in the test pipe string is increased, and then opening a circulating channel by the circulating nipple;
And detecting the pressure in the test tube string, thereby obtaining the lower seal checking pressure of the packer.
Compared with the prior art, the invention has the advantages that:
The device and the method for testing the performance of the downhole packer can realize in-pipe setting, and the lower annular space of the packer is subjected to the pressure sealing performance test after setting. According to the invention, the packer is put into a setting position, a pressure-holding condition is established by throwing a pressure-holding ball to the position of a ball seat, and the pressure in a pipe is increased to reach the setting condition of the packer, so that the packer is set; and after the packer is set, continuing to hold pressure, opening a circulating nipple at the lower end of the packer to ensure that the annular space at the lower part of the packer is communicated with the pipe string, continuing to hold pressure in the pipe, and allowing the pressure in the pipe to enter the lower end of the packer through the circulating nipple, so that the annular space pressure test at the lower part of the packer is realized, and the performance verification of the set state of the packer is truly verified.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of a downhole packer performance testing apparatus according to one embodiment of the invention, showing an initial state;
FIG. 2 is a schematic diagram of a downhole packer performance testing apparatus according to one embodiment of the invention, showing the packer set and circulation sub open;
FIG. 3 is a schematic diagram of a downhole packer performance testing apparatus according to one embodiment of the invention, showing a lower annulus seal verification condition;
FIG. 4 is a schematic diagram of the structure of a packer according to one embodiment of the invention;
FIG. 5 is a schematic view of a circulation sub according to one embodiment of the invention;
Fig. 6 is a schematic structural diagram of a pressure holding mechanism according to an embodiment of the invention.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
The meaning of the reference numerals in the drawings is as follows: 1. the pressure-building device comprises a circulation nipple, 2, a packer, 3, a pressure-building mechanism, 4, a drilling tool, 5, a well wall, 11, a circulation nipple body, 12, a differential pressure sliding sleeve, 13, a circulation hole, 14, a shear pin, 15, an inner limit step, 16, an outer limit step, 21, a central tube, 22, a rubber cylinder, 23, a pressure transmission hole, 24, a pressure relief hole, 25, a runner, 31, a ball seat, 32 and a pressure-building ball.
Detailed Description
In order to make the technical solution and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some of the embodiments of the present invention and are not exhaustive of all embodiments. And embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Figure 1 schematically illustrates a downhole packer performance testing apparatus according to one embodiment of the invention, including a string of test tubes connected below a drilling tool 4. The test tube string comprises a packer 2, and the packer 2 is set under the action of certain pressure. The lower part of the packer 2 is provided with a circulation nipple 1, and the circulation nipple 1 is started under a certain pressure and establishes a circulation channel inside and outside the test tube string. The lower part of the circulating nipple 1 is provided with a pressure holding mechanism 3, and the pressure holding mechanism 3 is configured to be capable of sealing the inside of the test tube string after being started to hold pressure above the test tube string. Wherein the pressure at which the circulation nipple 1 is activated is greater than the pressure at which the packer 2 is set.
When the downhole packer performance testing device according to the embodiment is used, after the pressure holding mechanism 3 is started, the pressure is held in the test tube string, and when the pressure is increased to a certain value, the packer 2 is set in an annulus between the test tube string and the well wall 5; and after the pressure is continuously increased, the circulation nipple 1 is opened, circulation is established below the packer 2, and the pressure in the drilling tool 4 is measured to obtain the lower seal checking pressure of the packer 2.
In one embodiment, the packer 2 comprises a base pipe 21 connected to the drilling tool 4, the base pipe 21 being of cylindrical tubular construction. The outside of the central tube 21 is provided with a packer shell which is of a tubular structure and is sleeved outside the central tube 21. The packer is provided with a rubber cylinder 22, and the rubber cylinder 22 can expand under the action of pressure. In this embodiment, the exterior of the packing element 22 is provided with a metallic packer 2 shoulder for setting against the borehole wall 5.
The central tube 21 is provided with a pressure transmission hole 23 along the radial direction, and the pressure transmission hole 23 is communicated with the inside of the central tube 21 and the inside of the rubber cylinder 22; the pressure in the central tube 21 is transmitted to the inner side of the rubber cylinder 22 through the pressure transmission hole 23, and the rubber cylinder 22 is pushed to expand and be set by the pressure.
When the downhole packer performance testing device according to the embodiment is tested, the pressure of the liquid in the central tube 21 is increased after the pressure is first suppressed by the suppressing mechanism 3. When the pressure increases to a certain extent, the liquid enters the inner side of the rubber cylinder 22 through the pressure transmission hole 23 of the central tube 21, and the rubber cylinder 22 begins to expand and seat under the action of the liquid pressure.
In a preferred embodiment, the pressure transfer hole 23 is arranged at the upper part of the central tube 21, and a flow passage 25 is arranged between the central tube 21 and the packer shell; the pressure transmitting hole 23 is connected with the inner side of the rubber cylinder 22 through a runner 25.
In one embodiment, a one-way valve is disposed in the pressure transmitting hole 23, and the liquid enters the flow passage 25 from the central tube 21 through the one-way valve, so that the packer 2 is also in a setting state after stopping holding pressure. The lower part of the central tube 21 is provided with a pressure relief hole 24; the pressure relief hole is arranged below the rubber cylinder 22 and the runner 25; after setting, the pressure relief hole 24 is moved to the position of the rubber cylinder 22 by lifting the test tube string, and the rubber cylinder 22 is depressurized through the pressure relief hole 24.
When the unset is needed, the string is lifted up, and the packing element 22 and the packer shell are fixed as the packing element 22 is in the set state, and the central tube 21 moves upwards along with the string. When the pressure release hole 24 moves to the position of the rubber cylinder 22, the rubber cylinder 22 releases pressure through the pressure release hole 24, so that deblocking is completed.
In one embodiment, the circulation nipple 1 comprises a circulation nipple body 11, the circulation nipple body 11 is a tubular nipple structure, and a circulation hole 13 is arranged at the upper part of the circulation nipple body along the radial direction. The inside of circulation nipple joint body 11 is provided with pressure differential sliding sleeve 12, and pressure differential sliding sleeve 12 can slide in the inside of circulation nipple joint body 11 under the effect of pressure. Wherein, the pressure difference sliding sleeve 12 is at a first position in an initial state and seals the circulating hole 13; when the pressure reaches a certain value, the pressure difference sliding sleeve 12 moves to a second position, so that the circulation hole 13 is opened.
In a preferred embodiment, the upper end surface of the differential pressure sliding sleeve 12 is provided with a differential pressure surface, and the differential pressure surface is used for bearing pressure and providing a downward force for the differential pressure sliding sleeve 12. In this embodiment, in the initial state, the differential pressure sliding sleeve 12 is in the first position and is connected to the circulation sub body 11 by the shear pins 14.
When the downhole blowout preventer for handling the downhole overflow according to the embodiment is used, after the pressure is suppressed by the pressure suppressing mechanism 3, the packer 2 is set when the pressure reaches a certain value, the pressure continues to be increased, and when the pressure applied by the pressure difference surface is greater than the shearing force of the shear pin 14, the shear pin 14 is sheared. At this time, the differential pressure sliding sleeve 12 is pushed to move downward under the pressure applied to the differential pressure surface until the second position is reached. The circulation hole 13 is opened when the differential pressure sliding sleeve 12 moves to the second position, thereby performing circulation. In the present embodiment, it is possible to prevent the shear pins 14 from opening the circulation holes 13 in advance by providing them, and the pressure for opening the circulation holes 13 is controlled by selecting the shear pins 14.
In one embodiment, an inner limit step 15 is disposed on the inner side of the circulation nipple body 11, an outer limit step 16 is disposed on the outer wall of the differential pressure sliding sleeve 12, and when the differential pressure sliding sleeve 12 moves to the second position, the inner limit step 15 is in clamping fit with the outer limit step 16.
In one embodiment, a plurality of sealing rings are arranged between the outer walls of the two ends of the differential pressure sliding sleeve 12 and the inner wall of the circulating nipple body 11. When the pressure difference sliding sleeve 12 is in the first position, the sealing ring at the upper part of the pressure difference sliding sleeve is positioned above the circulating hole 13; the lower sealing ring is positioned below the second step. In this way, a complete sealing of the circulation hole 13 can be ensured by the sealing ring.
In a preferred embodiment, the pressure holding mechanism 3 includes a ball seat 31, and after the pressure holding ball 32 is put into the ball seat 31, the pressure holding ball 32 is clamped on the ball seat 31, so as to seal the inside of the test tube string, and hold the upper portion of the test tube string.
According to another aspect of the invention, a method for testing the performance of a downhole packer is provided, and the method is realized by the device for testing the performance of the downhole packer according to the embodiment. The method comprises the following steps:
The downhole packer performance testing device is assembled, and a packer 2, a circulating nipple 1 and a holding-down mechanism 3 are assembled into a test tube string which is connected with a drilling tool 4.
Putting a pressure-building ball 32, enabling the pressure-building ball 32 to be positioned at the pressure-building mechanism 3 to enable the pressure-building mechanism 3 to build pressure, increasing the pressure in the test tube string, and setting the packer 2 when the pressure in the test tube string reaches a certain value; the pressure continues to increase until the circulation nipple 1 opens the circulation channel.
The pressure in the test tube string is detected, so that the lower seal checking pressure of the packer 2 is obtained.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all alterations and/or modifications that fall within the scope of the invention, and that are intended to be included within the scope of the invention.
Claims (9)
1. A downhole packer performance testing device, comprising:
a test string for connecting a drilling tool (4), the test string comprising:
A packer (2), the packer (2) being set at a certain pressure;
The circulating nipple (1) is arranged below the packer (2), and the circulating nipple (1) is started under a certain pressure and establishes a circulating channel inside and outside the test tube string; the circulating nipple (1) comprises a circulating nipple body (11), a circulating hole (13) is formed in the outer wall of the circulating nipple body (11), and a differential pressure sliding sleeve (12) is arranged in the circulating nipple body (11); wherein, in an initial state, the pressure difference sliding sleeve (12) is positioned at a first position and seals the circulating hole (13); the pressure difference sliding sleeve (12) can move to a second position in the circulating nipple body (11) under the action of pressure, and the circulating hole (13) is opened; and
The pressure-holding mechanism (3) is arranged below the circulating nipple (1), and the pressure-holding mechanism (3) is configured to be started and then can seal the inside of the test tube string to hold pressure above the test tube string;
After the pressure holding mechanism (3) is started, the pressure holding mechanism holds pressure in the test pipe string, and when the pressure is increased to a certain value, the packer (2) is set in an annulus between the test pipe string and the well wall (5); and after the pressure is continuously increased, the circulation nipple (1) is opened, circulation is established below the packer (2), and the pressure in the drilling tool (4) is measured to obtain the lower seal checking pressure of the packer (2).
2. A downhole packer performance testing device according to claim 1, wherein the packer (2) comprises a central tube (21) connected to the drilling tool (4), the outer side of the central tube (21) being provided with a packer casing; a rubber cylinder (22) is arranged on the packer shell;
The central tube (21) is radially provided with a pressure transmission hole (23), and the pressure transmission hole (23) is communicated with the inside of the central tube (21) and the inner side of the rubber cylinder (22); the pressure in the central tube (21) is transmitted to the inner side of the rubber cylinder (22) through the pressure transmission hole (23), and the rubber cylinder (22) is pushed to expand and be set by the pressure.
3. The downhole packer performance testing device according to claim 2, wherein the pressure transfer hole (23) is arranged at the upper part of the central tube (21), and a flow passage (25) is arranged between the central tube (21) and the packer housing; the pressure transmission hole (23) is connected with the inner side of the rubber cylinder (22) through a runner (25).
4. A downhole packer performance testing device according to claim 3, wherein a one-way valve is arranged in the pressure transfer hole (23), through which one-way valve liquid enters the flow passage (25) from the central tube (21);
the lower part of the central tube (21) is provided with a pressure relief hole (24); the pressure relief hole (24) is arranged below the rubber cylinder (22) and the runner (25); after setting, the pressure relief hole (24) is moved to the position of the rubber cylinder (22) by lifting the test tube string, and the rubber cylinder (22) is subjected to pressure relief through the pressure relief hole (24).
5. The downhole packer performance testing device according to claim 4, wherein an annular pressure difference surface is arranged on the upper end surface of the pressure difference sliding sleeve (12), and the pressure difference sliding sleeve (12) is connected with the circulation nipple body (11) through a shear pin (14) when in a first position.
6. The downhole packer performance testing device according to claim 5, wherein an inner limit step (15) is arranged on the inner side of the circulation nipple body (11), an outer limit step (16) is arranged on the outer wall of the differential pressure sliding sleeve (12), and when the differential pressure sliding sleeve (12) moves to the second position, the inner limit step (15) is in butt joint fit with the outer limit step (16).
7. The downhole packer performance testing device according to claim 6, wherein a plurality of sealing rings are arranged between the outer walls of the two ends of the differential pressure sliding sleeve (12) and the inner wall of the circulating nipple body (11).
8. The downhole packer performance testing device according to claim 7, wherein the pressure holding mechanism (3) comprises a ball seat (31), and after the pressure holding ball (32) is put into the well, the pressure holding ball (32) is clamped on the ball seat (31), so that the inside of the test string is blocked, and the upper part of the test string is held.
9. A method of testing performance of a downhole packer, comprising:
Assembling a downhole packer performance testing apparatus according to any one of claims 1-8;
Putting a pressure-building ball (32) into the pipe string to build pressure of the pressure-building mechanism (3), when the pressure in the test pipe string is increased, setting the packer (2), and then opening a circulating channel by the circulating nipple (1);
and detecting the pressure in the test tube string, thereby obtaining the lower seal checking pressure of the packer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492490.3A CN114646458B (en) | 2020-12-17 | 2020-12-17 | Downhole packer performance testing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492490.3A CN114646458B (en) | 2020-12-17 | 2020-12-17 | Downhole packer performance testing device and method |
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| Publication Number | Publication Date |
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| CN114646458A CN114646458A (en) | 2022-06-21 |
| CN114646458B true CN114646458B (en) | 2024-07-02 |
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| CN202011492490.3A Active CN114646458B (en) | 2020-12-17 | 2020-12-17 | Downhole packer performance testing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2060244A1 (en) * | 1991-01-30 | 1992-07-31 | J. Allan Clark | Hydraulic set packer and testing apparatus |
| CN101025083A (en) * | 2006-10-18 | 2007-08-29 | 西南石油大学 | Experiment method for packer working performance and apparatus thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4706746A (en) * | 1986-10-27 | 1987-11-17 | Halliburton Company | Downhole inflatable packer pump and testing apparatus |
| JP4756213B2 (en) * | 2006-03-28 | 2011-08-24 | 独立行政法人 日本原子力研究開発機構 | A water-impervious test method at the in-situ location of the borehole plugging material, a water-imperviousness test system at the location of the borehole plugging material, a method of analyzing the hydraulic conductivity of the top of the borehole plugging material, a strength analysis method of the top of the borehole plugging material, and boring Experimental equipment for water blocking chamber for hole blocking material |
| CN201705336U (en) * | 2010-06-10 | 2011-01-12 | 中国石油化工集团公司 | Simple shaft temporary closing testing pipe column |
| CN204419167U (en) * | 2014-12-08 | 2015-06-24 | 中国石油化工股份有限公司 | One is given up and is tested envelope integrated pipe column |
| CN104880307B (en) * | 2015-05-26 | 2017-08-04 | 中国石油天然气股份有限公司 | Packer performance detection device |
| CN109186866B (en) * | 2018-08-30 | 2020-09-22 | 中国海洋石油集团有限公司 | Packer seal testing device |
| CN109580207B (en) * | 2018-12-28 | 2020-02-18 | 中国科学院武汉岩土力学研究所 | Downhole packer performance test method and device |
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2020
- 2020-12-17 CN CN202011492490.3A patent/CN114646458B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2060244A1 (en) * | 1991-01-30 | 1992-07-31 | J. Allan Clark | Hydraulic set packer and testing apparatus |
| CN101025083A (en) * | 2006-10-18 | 2007-08-29 | 西南石油大学 | Experiment method for packer working performance and apparatus thereof |
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| CN114646458A (en) | 2022-06-21 |
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