CN112682019A - Expanding type layered fracturing packer with anchoring function - Google Patents
Expanding type layered fracturing packer with anchoring function Download PDFInfo
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- CN112682019A CN112682019A CN202011585703.7A CN202011585703A CN112682019A CN 112682019 A CN112682019 A CN 112682019A CN 202011585703 A CN202011585703 A CN 202011585703A CN 112682019 A CN112682019 A CN 112682019A
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- rubber cylinder
- packer
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- 238000004873 anchoring Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000007667 floating Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000004636 vulcanized rubber Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 20
- 230000008859 change Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000003129 oil well Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
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Abstract
The invention discloses an expansion type layered fracturing packer with an anchoring function, which comprises an upper joint, a steel belt seat, an upper rubber cylinder seat, a steel belt, a central pipe, a rubber cylinder, a lower rubber cylinder seat, a floating head and a lower joint, wherein the upper rubber cylinder seat is arranged on the upper joint; two ends of the steel belt are pressed and pricked on a steel belt seat, the rubber cylinder is divided into an inner layer and an outer layer and is vulcanized on two sides of the steel belt, the steel belt seat is respectively connected with an upper rubber cylinder seat and a lower rubber cylinder seat, and sealing rings are arranged at the connecting surfaces; the upper rubber cylinder seat is connected to the external thread of the upper joint, the lower rubber cylinder seat is connected to the external thread of the floating head, and the connecting surfaces are provided with sealing rings; the floating head penetrates through the central pipe, and a sealing ring is arranged at the matching surface; the upper end of the central tube is connected with an upper joint through oil tube threads, the lower end of the central tube is connected with a lower joint through oil tube threads, and two groups of slotting liquid inlet holes are further formed in the central tube. The casing variable well fracturing fluid has the characteristics of small outer diameter, high expansion ratio, self-anchoring function and good bearing performance, and can meet the requirements of casing variable well layered fracturing transformation.
Description
Technical Field
The invention relates to a layered fracturing packer, in particular to an expansion type layered fracturing packer with an anchoring function.
Background
Generally, low-porosity and low-permeability oil and gas reservoirs need fracturing modification to obtain productivity. When a well encounters a casing deformation with a reduced inner diameter, conventionally sized zonal fracturing tools such as hydraulic anchors and K344 packers will not be able to be run in properly. Especially, when the reducing well section of the oil and gas well is arranged on the upper part of the reservoir, the reservoir transformation cannot be fully and effectively carried out by the combined pressure, and the single well yield is low. Even some oil gas wells can not be transformed, so that production can not be obtained, and investment is wasted.
The publication number CN202531093U discloses an expansion type K344 packer, which is designed for achieving the purposes of good bearing performance, annular pressurization and deblocking of a sleeve and ensuring the success rate of operation, and mainly comprises a central tube connected with an upper joint and a lower joint, a vulcanization joint connected with a working barrel, an expansion rubber tube connected with the upper vulcanization joint and the lower vulcanization joint, a sealing piston arranged between the central tube and the upper working barrel, a pressure regulating nut, a sheath, a sealing sleeve and the like arranged between the central tube and the lower working barrel. The packer adopts a rubber one-way sealing seat pressure guide hole structure, and can ensure that the central tube releases pressure after the packer is seated, and the packer is not unsealed. Unlike the conventional K344 packer, when the packer is unsealed, the annular space of the casing is pressurized, the rubber sleeve of the packer is rebounded, and the packer is unsealed. The packer oil pipe pressure relief non-deblocking characteristic is suitable for multi-stage water injection of a water injection well, is not suitable for oil well layered fracturing, easily causes fracturing pipe columns to be sand-buried, and the pipe columns cannot be pulled out after fracturing.
For a casing change well layered fracturing packer, the packer has the following structural defects: the packer does not have an anchoring function, and needs to be matched with a hydraulic anchor, the hydraulic anchor with the conventional size cannot pass through a casing change well section, and a fracturing pipe column cannot be lowered to the specified well depth; and the packer rubber cylinder is of an integral structure, adopts a mode of fixing two ends, has a certain expansion ratio and no compensation function, and cannot play a role in effectively sealing and isolating the annular space. Under the high pressure difference, the packer rubber barrel is possibly torn, so that the packer is lost in sealing and cannot be subjected to partial pressure. And thirdly, the starting pressure (namely the displacement) required by the packer setting is large.
For some reasons either engineering or stratigraphic, there are a number of casing wells in the oil and gas development process each year. For domestic low-porosity and low-permeability oil and gas reservoirs, the problem to be solved urgently is to develop a small-diameter separate-layer fracturing packer to realize efficient development of a casing deformation well.
Disclosure of Invention
The invention aims to solve the technical problem that an expansion type layered fracturing packer with small diameter, high expansion ratio and anchoring function and a using method thereof are provided, and the problem that a conventional size layered fracturing tool cannot be put into a casing change well is solved; realize casing change well separate layer fracturing, high-efficient transformation reservoir, improve single well output.
In order to solve the technical problems, the invention adopts the technical scheme that: an expansion type layered fracturing packer with an anchoring function comprises an upper joint, a steel belt seat, an upper rubber cylinder seat, a steel belt, a central pipe, a rubber cylinder, a lower rubber cylinder seat, a floating head and a lower joint; two ends of the steel belt are pressed and pricked on a steel belt seat, the rubber cylinder is divided into an inner layer and an outer layer and is vulcanized on two sides of the steel belt, the steel belt seat is respectively connected with an upper rubber cylinder seat and a lower rubber cylinder seat, and sealing rings are arranged at the connecting surfaces; the upper rubber cylinder seat is connected to the external thread of the upper joint, the lower rubber cylinder seat is connected to the external thread of the floating head, and the connecting surfaces are provided with sealing rings; the floating head penetrates through the central pipe, and a sealing ring is arranged at the matching surface; the upper end of the central tube is connected with an upper joint through oil tube threads, the lower end of the central tube is connected with a lower joint through oil tube threads, and the central tube is further provided with two groups of slotting liquid inlet holes I and slotting liquid inlet holes II.
Two groups of slotting liquid inlet holes I and slotting liquid inlet holes II are formed in the central pipe, 45-degree phase angles of each group of liquid inlet holes are uniformly distributed on the circumference of the central pipe, and the width of each slotting is 0.2 mm.
The steel belt is made of stainless steel materials.
The rubber cylinder is characterized in that the vulcanized rubber on the inner side covers the steel belt seats at the two ends completely, the vulcanized rubber on the outer side is shorter, and part of the steel belt is exposed.
The steel belt seat is characterized in that an inverted tooth structure for preventing a steel belt from falling off is arranged on the outer side of the steel belt seat, and a groove for preventing inner vulcanized rubber from falling off is arranged on the inner side of the steel belt seat.
The steel band both ends are on being pricked the steel band seat, and the steel band seat passes through the screw thread to be connected with last rubber barrel holder and lower rubber barrel holder respectively, goes up the rubber barrel holder and passes through threaded connection to be fixed on last joint, and lower rubber barrel holder is connected on the first external screw thread that floats, and the head that floats is worn on the center tube, is equipped with the rubber ring groove on the minimum inner wall of head that floats, can form the dynamic seal cooperation with the center tube outer wall.
The invention has the beneficial effects that:
1. the expanding type layered fracturing packer has small outer diameter, can deform the diameter-reducing well section through the sleeve and smoothly descend to the designed well depth, thereby meeting the requirement of layered fracturing of a casing deformation well.
2. The steel belt of the packer is made of stainless steel with high elasticity and small residual deformation, so that the requirement of high expansion ratio can be met, and the pulling-out of the pressed pipe column is facilitated.
3. The packer adopts a lower end floating compensation structure, so that the expansion ratio of the packer is greatly improved, the exposed steel belt and the outer vulcanized rubber can be completely attached to the inner wall of the sleeve, and the pressure bearing capacity of the packer is improved.
4. The exposed part of the steel belt of the packer and the rubber on the outer side are completely attached to the inner wall of the sleeve during fracturing, so that the anchoring pipe column is realized, the pipe column creeping and packer sealing losing effects are prevented, and the problem that the conventional size hydraulic anchor cannot change a well section through a sleeve is solved.
5. The feed liquor hole on the packer center tube adopts the slot design, and fracturing sand gets into the chamber bag of packer in can effectively preventing when fracturing, has reduced the unable deblocking's of packer pressure release risk after pressing.
6. The liquid inlet holes of the packer are designed into two groups, so that the effect of balancing the pressure difference inside and outside the packer is achieved, and the mistaken setting when the packer is put into the packer can be effectively prevented.
Drawings
FIG. 1 is a structural cross-sectional view of the expandable zonal fracturing packer of the present invention with anchoring functionality.
FIG. 2 is a structural cross-sectional view of a steel band seat of the expandable zonal fracturing packer of the present invention with anchoring functionality.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the expandable layered fracturing packer with anchoring function of the invention comprises an upper joint 1, a steel belt seat 4, an upper rubber cylinder seat 5, a steel belt 6, a central pipe 7, a rubber cylinder 8, a lower rubber cylinder seat 9, a floating joint 10 and a lower joint 12; two ends of a steel belt 6 are pressed and pricked on a steel belt seat 4, a rubber cylinder 8 is divided into an inner layer and an outer layer and is vulcanized on two sides of the steel belt 6, the steel belt seat 4 is respectively connected with an upper rubber cylinder seat 5 and a lower rubber cylinder seat 9, and a sealing ring 3 is arranged at the connecting surface; the upper rubber cylinder seat 5 is connected on the external thread of the upper joint 1, the lower rubber cylinder seat 9 is connected on the external thread of the floating head 10, and the connecting surfaces are all provided with sealing rings 2; the floating head 10 penetrates through the central pipe 7, and a sealing ring 11 is arranged at the matching surface; the upper end of the central tube 7 is connected with the upper joint 1 through oil tube threads, the lower end of the central tube 7 is connected with the lower joint 12 through oil tube threads, and the central tube 7 is further provided with two groups of slotting liquid inlet holes I and slotting liquid inlet holes II.
Two groups of slotting liquid inlet holes I and slotting liquid inlet holes II are formed in the central pipe 7, 45-degree phase angles of each group of liquid inlet holes are uniformly distributed on the circumference of the central pipe 7, and the width of each slotting is 0.2 mm.
The steel belt 6 is made of stainless steel materials.
The steel belt seats 4 at two ends are completely sealed by vulcanized rubber at the inner side of the rubber cylinder 8, the vulcanized rubber at the outer side is shorter, and part of the steel belt is exposed.
As shown in fig. 2, the outer side of the steel belt seat 4 is provided with an inverted tooth structure for preventing the steel belt 6 from falling off, and the inner side of the steel belt seat 4 is provided with a groove for preventing the vulcanized rubber at the inner layer from falling off.
On 6 both ends of steel band were pressed and are pricked steel band seat 4, steel band seat 4 was connected with last rubber barrel holder 5 and lower rubber barrel holder 9 respectively through the screw thread, goes up rubber barrel holder 5 and fixes on top connection 1 through threaded connection, and lower rubber barrel holder 9 is connected on the first 10 external screw threads that float, and the head 10 that float is worn on center tube 7, is equipped with the rubber ring groove on the minimum inner wall of the head 10 that float, can form the dynamic seal cooperation with the outer wall of center tube 7.
Example 1
As shown in figure 1, the central pipe 7 adopts a standard 23/8-P110 flat oil pipe, and both ends of the central pipe 7 are respectively connected with the upper joint 1 and the lower joint 12 through 23/8 TBG oil pipe threads.
According to the layered fracturing packer disclosed by the invention, as the standard 23/8-P110 flat oil pipe is adopted as the central pipe, the outer diameter of the packer is made to be as small as possible during design while the requirements on sealing performance and erosion resistance are met, so that the packer can deform through a sleeve to reduce the diameter of a well section and smoothly drop to the designed well depth, and the requirements on layered fracturing of a cased and transformed well are met.
Example 2
As shown in figure 1, two ends of the steel belt 6 are pressed and bound on the steel belt seat 4, and the steel belt 6 is made of a stainless steel material with high elasticity and small residual deformation.
According to the separate-layer fracturing packer disclosed by the invention, the steel belt is made of the stainless steel material with high elasticity and small residual deformation, so that the requirement of high expansion ratio can be met, and the pressed pipe column can be conveniently pulled out.
Example 3
On the basis of the embodiment 2, the rubber cylinder 8 is divided into an inner layer and an outer layer, and is vulcanized on two sides of the steel belt 6. The steel belt seats 4 at two ends are completely covered by the vulcanized rubber at the inner side, the vulcanized rubber at the outer side is shorter, and part of the steel belt is exposed; the steel band seat 4 is connected with an upper rubber cylinder seat 5 and a lower rubber cylinder seat 9 through threads respectively, the upper rubber cylinder seat 5 is fixed on the upper joint 1 through threaded connection, the lower rubber cylinder seat 9 is connected on the external thread of the floating head 10, the floating head 10 penetrates through the central tube 7, a rubber ring groove is formed in the inner wall with the smallest floating head 10, and the rubber ring groove can be matched with the outer wall of the central tube 7 in a dynamic sealing mode to form a lower floating compensation structure.
According to the separate-layer fracturing packer disclosed by the invention, as the packer adopts a lower-end floating compensation structure, the expansion ratio of the packer is greatly improved, the exposed steel belt and the vulcanized rubber at the outer side can be completely attached to the inner wall of the sleeve, and the pressure-bearing capacity of the packer is improved.
Example 4
On the basis of the embodiment 3, the exposed part of the steel belt 6 and the rubber on the outer side of the rubber sleeve 8 can be completely attached to the inner wall of the sleeve.
According to the separate-layer fracturing packer disclosed by the invention, along with the lifting of the injection displacement during fracturing, the exposed part of the steel belt and the rubber at the outer side are attached to the inner wall of the sleeve, so that the contact force is improved, the functions of anchoring a pipe column, preventing the pipe column from creeping and preventing the packer from being unsealed are achieved, and the problem that a hydraulic anchor with a conventional size cannot pass through a casing-changed well section is solved.
Example 5
As shown in figure 1, two groups of slotting liquid inlet holes I and II are arranged on the central pipe 7, each group of liquid inlet holes are uniformly distributed on the circumference of the central pipe 7 at a phase angle of 45 degrees, and the width of a slotting is 0.2 mm.
According to the separate-layer fracturing packer disclosed by the invention, as the liquid inlet hole adopts a slotted design, fracturing sand can be effectively prevented from entering a cavity bag of the packer during fracturing, and the risk that the packer cannot be unsealed after being pressurized and decompressed is reduced.
Example 6
On the basis of embodiment 5, two groups of slotted liquid inlet holes I and II are formed in the central pipe 7.
According to the separate-layer fracturing packer, the two groups of liquid inlet holes are designed, so that the effect of balancing the internal and external pressure difference of the packer is achieved, and the packer can be effectively prevented from being mistakenly set when being put down.
Example 7
The invention discloses a method for using a separate-layer fracturing packer, which comprises the following steps: and (4) putting the packer and the ball throwing sliding sleeve into the well along with the fracturing oil pipe, and putting the well to the designed well depth through the sleeve variable well section. After the fracturing fluid is delivered to a specified position, a ground fracturing pump truck is started, fracturing fluid enters a cavity bag of a packer from the slot liquid inlet holes I and II of a K344 packer (namely the packer of the invention, the same is applied below), and the K344 packer in a pipe column is set under the action of throttling pressure. Along with the lifting of the injection displacement, the exposed part of the packer steel belt 6 and the rubber at the outer side of the rubber sleeve 8 are completely attached to the inner wall of the casing pipe, and interlayer isolation of a fracturing layer is carried out. After the first layer of construction is finished, balls matched with the second layer of pitching sliding sleeves are thrown in from the well mouth, the pitching sliding sleeves are opened after the balls fall into the ball seats in the pitching sliding sleeves in a pressure-building mode, and second layer fracturing construction is conducted. And then according to the steps until all the fracturing layer construction is finished.
Particularly, the exposed part of the packer steel belt 6 is attached to the inner wall of the casing pipe to play a role in anchoring the pipe column, so that the pipe column is prevented from creeping and the packer is protected during fracturing, and the problem that the conventional size hydraulic anchor cannot pass through the casing to change the well section is effectively solved. In addition, the floating head 10 of the packer penetrates through the central pipe 7, the minimum inner wall of the floating head 10 and the outer wall of the central pipe 7 form dynamic sealing matching, along with the increase of injection displacement, the floating head 10 can move towards the center line along the central pipe 7, and the compensation mode of 'downward floating' can greatly improve the expansion ratio of the packer, so that the problem of 'small-diameter large-annulus sealing' is effectively solved. At the same time, the activation pressure (i.e., displacement) required for packer setting is small. The packer rubber sleeve 8 is made of a high-elasticity steel belt material, so that the pressure bearing capacity of the packer is further enhanced. The feed liquor hole of center tube 7 adopts the slot mode, and the slot width is 0.2mm, can prevent effectively that fracturing sand from getting into the chamber bag of packer in, the packer pressure release deblocking of being convenient for.
The fracturing pipe column can be directly adopted for production after the gas well is pressurized. After the oil well is pressed, before the oil well is put into operation, the fracturing pipe column in the oil well needs to be lifted out and put into an oil production pipe column. Because the steel belt 6 adopts the material that the residual deformation volume is little, simultaneously, the packer adopts the upper end to fix in the design, easily takes out from the set well section after the packer deblocking.
The layered fracturing packer has the characteristics of small diameter, high expansion ratio, anchoring function and good bearing performance, and can meet the requirements of layered fracturing reconstruction of a casing transformer well.
In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.
Claims (6)
1. An expanding type layered fracturing packer with an anchoring function is characterized by comprising an upper joint (1), a steel belt seat (4), an upper rubber sleeve seat (5), a steel belt (6), a central pipe (7), a rubber sleeve (8), a lower rubber sleeve seat (9), a floating joint (10) and a lower joint (12); two ends of a steel belt (6) are pressed and pricked on a steel belt seat (4), a rubber cylinder (8) is divided into an inner layer and an outer layer, the inner layer and the outer layer are vulcanized on two sides of the steel belt (6), the steel belt seat (4) is respectively connected with an upper rubber cylinder seat (5) and a lower rubber cylinder seat (9), and sealing rings (3) are arranged at the connecting surfaces; the upper rubber cylinder seat (5) is connected to the external thread of the upper joint (1), the lower rubber cylinder seat (9) is connected to the external thread of the floating head (10), and the connecting surfaces are provided with sealing rings (2); the floating head (10) penetrates through the central pipe (7), and a sealing ring (11) is arranged on a matching surface; the upper end of the central pipe (7) is connected with the upper joint (1) through oil pipe threads, the lower end of the central pipe (7) is connected with the lower joint (12) through oil pipe threads, and the central pipe (7) is further provided with two groups of slot liquid inlet holes I and slot liquid inlet holes II.
2. The expandable layered fracturing packer with anchoring function as claimed in claim 1, characterized in that two sets of slot inlet holes i and slot inlet holes ii are arranged on the central pipe (7), each set of slot inlet holes is evenly distributed on the circumference of the central pipe (7) at a phase angle of 45 degrees, and the slot width is 0.2 mm.
3. The expandable layered fracturing packer with anchoring function as claimed in claim 1, characterized in that the steel belt (6) is made of stainless steel.
4. The expandable layered fracturing packer with anchoring function as claimed in claim 1, characterized in that the rubber cylinder (8) is internally vulcanized to completely cover the steel belt seats (4) at both ends, and the externally vulcanized rubber is shorter and part of the steel belt is exposed.
5. The expandable layered fracturing packer with anchoring function as claimed in claim 1, characterized in that the outside of the steel band seat (4) is provided with an inverted tooth structure for preventing the steel band (6) from falling off, and the inside of the steel band seat (4) is provided with a groove for preventing the vulcanized rubber of the inner layer from falling off.
6. The expandable layered fracturing packer with anchoring function as claimed in claim 1, wherein two ends of the steel belt (6) are pressed and tied on the steel belt seat (4), the steel belt seat (4) is respectively connected with the upper rubber cylinder seat (5) and the lower rubber cylinder seat (9) through threads, the upper rubber cylinder seat (5) is fixed on the upper joint (1) through threaded connection, the lower rubber cylinder seat (9) is connected on the external threads of the floating head (10), the floating head (10) penetrates through the central pipe (7), and the smallest inner wall of the floating head (10) is provided with a rubber ring groove which can form dynamic sealing fit with the outer wall of the central pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585703.7A CN112682019A (en) | 2020-12-28 | 2020-12-28 | Expanding type layered fracturing packer with anchoring function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585703.7A CN112682019A (en) | 2020-12-28 | 2020-12-28 | Expanding type layered fracturing packer with anchoring function |
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| Publication Number | Publication Date |
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| CN112682019A true CN112682019A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011585703.7A Pending CN112682019A (en) | 2020-12-28 | 2020-12-28 | Expanding type layered fracturing packer with anchoring function |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403660A (en) * | 1980-08-08 | 1983-09-13 | Mgc Oil Tools, Inc. | Well packer and method of use thereof |
| CN203547649U (en) * | 2013-08-01 | 2014-04-16 | 众通（北京）能源技术有限公司 | Sand-proof clamping-proof cracking-proof packer |
| CN203847052U (en) * | 2014-04-15 | 2014-09-24 | 濮阳市科锐机械工程技术有限公司 | Hydraulic expansion type steel frame fracturing packer |
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN204941434U (en) * | 2015-08-21 | 2016-01-06 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN205669388U (en) * | 2015-12-31 | 2016-11-02 | 濮阳市博德石油设备有限公司 | A kind of Inflatable type packer rubber sleeve based on high resiliency stainless steel band casing play |
| CN211058763U (en) * | 2019-12-06 | 2020-07-21 | 中国石油集团西部钻探工程有限公司 | Special packer |
-
2020
- 2020-12-28 CN CN202011585703.7A patent/CN112682019A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403660A (en) * | 1980-08-08 | 1983-09-13 | Mgc Oil Tools, Inc. | Well packer and method of use thereof |
| CN203547649U (en) * | 2013-08-01 | 2014-04-16 | 众通（北京）能源技术有限公司 | Sand-proof clamping-proof cracking-proof packer |
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN203847052U (en) * | 2014-04-15 | 2014-09-24 | 濮阳市科锐机械工程技术有限公司 | Hydraulic expansion type steel frame fracturing packer |
| CN204941434U (en) * | 2015-08-21 | 2016-01-06 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN205669388U (en) * | 2015-12-31 | 2016-11-02 | 濮阳市博德石油设备有限公司 | A kind of Inflatable type packer rubber sleeve based on high resiliency stainless steel band casing play |
| CN211058763U (en) * | 2019-12-06 | 2020-07-21 | 中国石油集团西部钻探工程有限公司 | Special packer |
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