CN111911109A - Sealing rubber cylinder - Google Patents
Sealing rubber cylinder Download PDFInfo
- Publication number
- CN111911109A CN111911109A CN201910379694.7A CN201910379694A CN111911109A CN 111911109 A CN111911109 A CN 111911109A CN 201910379694 A CN201910379694 A CN 201910379694A CN 111911109 A CN111911109 A CN 111911109A
- Authority
- CN
- China
- Prior art keywords
- rubber cylinder
- packing
- main body
- metal
- upper joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000012856 packing Methods 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 11
- 238000004873 anchoring Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
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)
- Gasket Seals (AREA)
Abstract
The invention provides a sealing rubber cylinder which comprises an upper joint, a rubber cylinder main body and a lower joint. The rubber cylinder main body comprises at least two layers of overlapped metal frameworks, and an outer rubber cylinder and an inner rubber cylinder which are respectively arranged outside and inside the metal frameworks. The two ends of the rubber cylinder main body are respectively connected with the upper joint and the lower joint. The sealing rubber sleeve provided by the invention can reduce the damage risk of entering a well, has high reliability and reduces the failure probability of the packer.
Description
Technical Field
The invention belongs to the technical field of petroleum development equipment, and particularly relates to a sealing rubber cylinder.
Background
Open hole acid fracturing is a mature technology and is one of important yield increasing measures for carbonate rock block development, acid fracturing is required to be carried out to communicate a fracture hole before production, the open hole acid fracturing usually adopts a seal-up pressure-reduction mode, the fracturing mode can make a contribution to improving the flow conductivity of a reservoir stratum, increasing the yield of a production well or the injection amount of an injection well, and the bottom temperature is increased along with the continuous increase of the well depth. The existing common open hole packer cannot effectively improve the stress state of a rubber sleeve in the expansion process, the rubber sleeve has the risk of blasting in a pressure-bearing state, in addition, the self anchoring force of the packer is not enough, and the arrangement of a process pipe column does not pay attention to the anchoring of the packer, so that the failure probability of the packer is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the sealing rubber cylinder which can reduce the damage risk of entering a well, has high reliability and reduces the failure probability of a packer.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a sealing rubber cylinder comprises an upper joint, a rubber cylinder main body and a lower joint. The rubber cylinder main body comprises at least two layers of overlapped metal frameworks, and an outer rubber cylinder and an inner rubber cylinder which are respectively arranged outside and inside the metal frameworks. The two ends of the rubber cylinder main body are respectively connected with the upper joint and the lower joint.
According to the sealing rubber cylinder, due to the fact that the metal frameworks which are arranged in a multi-layer overlapping mode are adopted, compared with the prior art, the strength of the supporting frameworks can be increased, anchoring force and supporting for the packer can be better provided, and the failure probability of the packer is reduced. The outer rubber cylinder is attached to the well wall, so that the sealing performance can be well ensured, the damage risk of entering the well is reduced, and the reliability is high. Interior packing element is located metal framework inboard, and interior packing element pressure improves along with construction pressure and lasts the increase during fracturing construction, provides sufficient extrusion force for the lasting laminating of outer packing element and the wall of a well.
With respect to the above technical solution, further improvements as described below can be made.
In a preferred embodiment, the metal framework comprises at least two metal sheets with involute arcs in cross section, which are overlapped and arranged to form a cylinder.
Because the part that overlaps each other that has between the sheetmetal, and expand to seal and open the back, still can keep overlapping more than two at least, the structure that overlaps each other makes the skeleton become a barrel-shaped whole and have higher intensity, prevents that the rubber material of interior packing element from extruding the destruction from between the skeleton sheetmetal to can make metal skeleton realize high bearing capacity and great anchoring force at the contact seal in-process after the expansion of sealing rubber tube.
Further, in a preferred embodiment, a flexible anchor tile is sleeved on the end part, close to the upper connector, of the rubber cylinder main body, and the upper connector is sleeved on the flexible anchor tile.
Through setting up flexible anchor tile, can expand along with metal framework and packing element together in the bloated seal in-process, realize preventing that tip rubber from extruding, reducing the function of skeleton deformation and anchoring stratum.
Specifically, in a preferred embodiment, the flexible anchor tile is shaped like a horn, and the outer wall of the flexible anchor tile is provided with a tooth-like structure.
The flexible anchor tile structure is loudspeaker form, be favorable to the flexible anchor tile to expand along with metal framework and outer packing element, wedge into the stratum after the inflation, dentate structure through on the outer wall can further solve the packer inflation back anchoring force not enough and the metal framework pressure-bearing effect under the problem of hard bending appears, thereby transition protection through the flexible anchor tile makes sealed packing element seat have very high pressure-bearing and anti deformability after sealing, improve the pressure differential resistance ability of packer under high temperature high pressure operating mode, during the deblocking, can shrink naturally, avoid because sealed inefficacy phenomenon that sealed packing element shoulder damage caused takes place.
Specifically, in a preferred embodiment, the inner rubber tube is extruded through a die, and a steel cord structure is arranged inside the inner rubber tube.
The steel wire cord structure and the inner rubber cylinder extruded and formed by the die are increased, so that the structural strength is better, the overall strength of the whole sealing rubber cylinder can be further improved, and high pressure bearing and large anchoring force are realized in the contact sealing process after expansion.
Further, in a preferred embodiment, the two ends of the inner rubber tube are respectively vulcanized and integrated with the vulcanized joints.
The vulcanizing joint and the inner rubber cylinder main body are vulcanized to form a whole body, so that the structural strength and the length of the sealing section of the inner rubber cylinder can be increased.
Further, in a preferred embodiment, two ends of the inner rubber cylinder are fixed on the metal framework through locking sleeves.
The inner rubber cylinder can be firmly fixed on the metal framework through the locking sleeve, so that the sealing performance of the end part of the sealing rubber cylinder is improved.
Further, in a preferred embodiment, the outer surface of the locking sleeve is provided with a leading tooth thread structure.
The locking sleeve can be effectively prevented from backing up by arranging the guide tooth thread structure.
Further, in a preferred embodiment, the end of the locking sleeve remote from the metal framework is provided with a press ring.
The compression rings are arranged at the two ends of the locking sleeve, so that the inner rubber cylinder can be further firmly fixed on the metal framework, and the sealing performance of the sealing rubber cylinder is further improved.
Specifically, in a preferred embodiment, the metal framework, the upper joint and the lower joint are all made of aluminum alloy materials.
The metal part of the sealing rubber cylinder is made of 7-series high-strength aluminum alloy materials, has the advantages of strong toughness, uniform deformation, easiness in welding and difficulty in cutting the inner rubber cylinder, can effectively ensure smooth expansion and recovery actions of the packer rubber cylinder, can drill or dissolve the packer rubber cylinder or pump and inject specific acid liquor, can avoid the drilling sticking and well repairing risks caused by the damage of the sealing rubber cylinder, and can improve the safety and reliability in the testing and fracturing processes.
Compared with the prior art, the invention has the advantages that: the damage risk of entering the well can be reduced, the reliability is high, and the failure probability of the packer is reduced.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic cross-sectional view of a packing unit according to an embodiment of the present invention;
fig. 2 schematically shows a cross-sectional structure of a packing rubber cartridge according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained in detail with reference to the figures and the embodiments without thereby limiting the scope of protection of the invention.
Fig. 1 schematically shows an overall cross-sectional structure of a packing unit 10 according to an embodiment of the present invention. Fig. 2 schematically shows a cross-sectional structure of the packing rubber 10 according to the embodiment of the present invention.
As shown in fig. 1 and 2, a packing rubber cartridge 10 according to an embodiment of the present invention includes an upper joint 1, a rubber cartridge body 2, and a lower joint 3. The rubber cylinder main body 2 comprises at least two layers of overlapped metal frameworks 21, and an outer rubber cylinder 22 and an inner rubber cylinder 23 which are respectively arranged outside and inside the metal frameworks 21. The two ends of the rubber cylinder main body 2 are respectively welded and fixed with the upper joint and the lower joint. According to the sealing rubber cylinder disclosed by the embodiment of the invention, because the metal frameworks which are arranged in a multilayer overlapping mode are adopted, compared with the prior art, the strength of the supporting frameworks can be increased, so that the anchoring force can be better provided for the packer, the packer can be supported, and the failure probability of the packer is reduced. The outer rubber cylinder is attached to the well wall, so that the sealing performance can be well ensured, the damage risk of entering the well is reduced, and the reliability is high. The inner rubber sleeve is positioned on the inner side of the metal framework, the pressure of the inner rubber sleeve is continuously increased along with the improvement of construction pressure during fracturing construction, and the failure probability of the packer can be further reduced. Preferably, the outer rubber sleeve 22 is arranged on the outer layer of the metal framework 21 in a bonding or vulcanization mode.
According to the packing unit 10 of the present invention, the metal framework 21 preferably includes at least two metal sheets with involute arcs in cross section, which are overlapped and arranged to form a cylinder. Because the overlapped parts are arranged between the metal sheets, the structural strength is higher, so that the metal framework can realize high pressure bearing capacity and larger anchoring force after the metal framework is in contact sealing after the sealing rubber cylinder is expanded. Preferably, the area overlap between the foils is preferably 55% to 90%.
Further, as shown in fig. 1 and fig. 2, in this embodiment, a flexible anchor shoe 4 is sleeved on an end portion of the rubber tube main body 2 close to the upper joint 1, and the upper joint 1 is sleeved on the flexible anchor shoe 4. Through setting up flexible anchor tile, can expand along with metal framework and packing element together in the bloated seal in-process, realize preventing that rubber from extruding, reducing the function that the skeleton warp and anchoring stratum. Preferably, in this embodiment, the flexible anchor tile 4 is shaped like a trumpet, and the outer wall of the flexible anchor tile 4 is provided with a tooth-like structure. The flexible anchor tile structure is loudspeaker form, be favorable to the flexible anchor tile to expand along with metal framework and outer packing element, wedge into the stratum after the bloated, dentate structure through on the outer wall can further solve the packer bloated not enough and the metal framework pressure-bearing effect of back anchoring force appear the problem of hard bending down, thereby the transition protection through flexible anchor tile makes sealed packing element seat have very high pressure-bearing and anti deformability after sealing, improve the pressure-resistant ability of packer under high temperature high pressure operating mode, during the deblocking, can shrink naturally and make the smooth deblocking of packer play out, avoid because sealed inefficacy phenomenon that sealed packing element shoulder damage caused takes place.
As shown in fig. 1 and 2, in the present embodiment, preferably, the inner rubber tube 23 is formed by extrusion through a die, and the inner rubber tube 23 is internally provided with a steel cord structure 5 arranged in a vertical or crossed manner. Specifically, the steel cord structure 5 is arranged in the mold cavity integrally vulcanized with the rubber, the steel cord structure 5 being located at one-half of the thickness of the inner rubber tube 23. The steel wire cord structure and the inner rubber cylinder formed by extrusion through the die are increased, so that the structural strength is better, and the whole sealing rubber cylinder can further realize high pressure bearing and larger anchoring force in the contact sealing process after the sealing rubber cylinder is expanded. Further, in the present embodiment, both ends of the inner rubber tube 23 are respectively vulcanized with the vulcanization joints 6. The vulcanizing joint and the inner rubber cylinder main body are vulcanized to form a whole body, so that the structural strength and the length of the sealing section of the inner rubber cylinder can be increased.
Preferably, as shown in fig. 1 and 2, in the present embodiment, the inner rubber tube 23 is fixed at both ends to the metal framework 21 through the locking sleeve 7. The locking sleeve can ensure that the inner rubber tube is firmly fixed on the metal framework, so that the sealing performance of the sealing rubber tube is improved. Further, in the present embodiment, the outer surface of the locking sleeve 7 is provided with a guide tooth thread structure. The locking sleeve can be effectively prevented from backing up by arranging the guide tooth thread structure. Furthermore, in the present embodiment, the end of the locking sleeve 7 away from the metal framework 21 is provided with a pressing ring 8. The compression rings are arranged at the two ends of the locking sleeve, so that the inner rubber cylinder can be further firmly fixed on the metal framework, and the sealing performance of the sealing rubber cylinder is further improved. Specifically, the compression ring 8 is internally provided with threads and can be connected with the vulcanization connector 6, so that the compression of the locking sleeve is ensured. The inside and outer packing element 22 tip bonding of flexible anchor tile 4 are whole, and interior packing element 23 inflation makes metal framework 21 expansion, and metal framework 21 expansion makes outer packing element 22 inflation compress tightly the wall of a well, and along with internal pressure's rising, flexible anchor tile 4 opens and bites the wall of a well tightly. After unsealing, the bell mouth of the flexible anchor tile 4 faces downwards, and the natural shrinkage can expand and contract along with the inner rubber sleeve 23 in the lifting process.
Specifically, in the present embodiment, the metal framework 21, the upper joint 1 and the lower joint 3 are preferably made of aluminum alloy. The metal part of the sealing rubber cylinder is made of 7-series high-strength aluminum alloy materials, has the advantages of strong toughness, uniform deformation, easiness in welding and difficulty in cutting the inner rubber cylinder, can effectively ensure smooth expansion and recovery actions of the packer rubber cylinder, can drill or dissolve the packer rubber cylinder or pump and inject specific acid liquor, can avoid the drilling sticking and well repairing risks caused by the damage of the sealing rubber cylinder, and can improve the safety and reliability in the testing and fracturing processes.
According to the embodiment, the sealing rubber barrel can reduce the damage risk of entering a well, is high in reliability and reduces the failure probability of the packer.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A sealing rubber cylinder is characterized by comprising an upper joint, a rubber cylinder main body and a lower joint; wherein,
the rubber cylinder main body comprises at least more than two layers of overlapped metal frameworks, and an outer rubber cylinder and an inner rubber cylinder which are respectively arranged outside and inside the metal frameworks;
the two ends of the rubber cylinder main body are respectively connected with the upper joint and the lower joint.
2. The packing unit according to claim 1, wherein the metal frame comprises at least two or more metal sheets having an involute arc cross section and arranged in a cylindrical shape.
3. The packing rubber cylinder according to claim 1 or 2, characterized in that a flexible anchor tile is sleeved on the end part of the rubber cylinder main body close to the upper joint, and the upper joint is sleeved on the flexible anchor tile.
4. The packing unit of claim 3, wherein the flexible anchor shoe is shaped like a trumpet and the outer wall of the flexible anchor shoe is provided with a tooth-like structure.
5. The packing rubber tube according to any one of claims 1 to 4, wherein the inner rubber tube is formed by extrusion through a die, and a steel cord structure is arranged inside the inner rubber tube.
6. The packing unit according to any one of claims 1 to 5, wherein both ends of the inner packing casing are vulcanized integrally with vulcanized joints, respectively.
7. The packing rubber tube of claim 6, wherein two ends of the inner rubber tube are fixed on the metal framework through locking sleeves.
8. The packing sleeve of claim 7, wherein the outer surface of the locking sleeve is provided with a guide tooth thread structure.
9. The packing unit according to claim 7 or 8, wherein a press ring is provided on an end of the locking sleeve away from the metal frame.
10. The packing unit according to any one of claims 1 to 9, wherein the metal frame, the upper joint and the lower joint are made of an aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379694.7A CN111911109A (en) | 2019-05-08 | 2019-05-08 | Sealing rubber cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379694.7A CN111911109A (en) | 2019-05-08 | 2019-05-08 | Sealing rubber cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111911109A true CN111911109A (en) | 2020-11-10 |
Family
ID=73242015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910379694.7A Pending CN111911109A (en) | 2019-05-08 | 2019-05-08 | Sealing rubber cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111911109A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539039A (en) * | 2020-11-27 | 2021-03-23 | 中石化石油机械股份有限公司研究院 | Top drive lower casing sealing device |
| CN113756776A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Large-inclination-angle multi-media component pipe column system for segmented fracturing |
| CN116816298A (en) * | 2023-07-19 | 2023-09-29 | 德州地平线石油科技股份有限公司 | High-temperature high-pressure corrosion-resistant expansion metal framework rubber cylinder and processing equipment thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613555A (en) * | 1994-12-22 | 1997-03-25 | Dowell, A Division Of Schlumberger Technology Corporation | Inflatable packer with wide slat reinforcement |
| CN2725514Y (en) * | 2004-09-24 | 2005-09-14 | 铁岭市天星胶业有限公司 | Steel wire cord sutomatic expansion type oil field packer rubber cylinder |
| CN101592025A (en) * | 2009-06-24 | 2009-12-02 | 东营市兆鑫工贸有限责任公司 | Inflatable anchoring packer |
| CN101696623A (en) * | 2009-10-29 | 2010-04-21 | 辽宁奥夫斯达石油装备有限公司 | Steel wire cord expanding rubber packer for oil or gas well |
| CN202273630U (en) * | 2011-10-29 | 2012-06-13 | 高伟时 | Controllable pressure-release antitheft well shutting device in well opening |
| CN203114238U (en) * | 2013-03-17 | 2013-08-07 | 中国石油集团渤海钻探工程有限公司 | Compression packer rubber tube |
| 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 |
| CN208252080U (en) * | 2018-05-25 | 2018-12-18 | 咸阳三精科技股份有限公司 | Expanding steel wire cord fabric thread packing element |
-
2019
- 2019-05-08 CN CN201910379694.7A patent/CN111911109A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613555A (en) * | 1994-12-22 | 1997-03-25 | Dowell, A Division Of Schlumberger Technology Corporation | Inflatable packer with wide slat reinforcement |
| CN2725514Y (en) * | 2004-09-24 | 2005-09-14 | 铁岭市天星胶业有限公司 | Steel wire cord sutomatic expansion type oil field packer rubber cylinder |
| CN101592025A (en) * | 2009-06-24 | 2009-12-02 | 东营市兆鑫工贸有限责任公司 | Inflatable anchoring packer |
| CN101696623A (en) * | 2009-10-29 | 2010-04-21 | 辽宁奥夫斯达石油装备有限公司 | Steel wire cord expanding rubber packer for oil or gas well |
| CN202273630U (en) * | 2011-10-29 | 2012-06-13 | 高伟时 | Controllable pressure-release antitheft well shutting device in well opening |
| CN203114238U (en) * | 2013-03-17 | 2013-08-07 | 中国石油集团渤海钻探工程有限公司 | Compression packer rubber tube |
| 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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539039A (en) * | 2020-11-27 | 2021-03-23 | 中石化石油机械股份有限公司研究院 | Top drive lower casing sealing device |
| CN113756776A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Large-inclination-angle multi-media component pipe column system for segmented fracturing |
| CN116816298A (en) * | 2023-07-19 | 2023-09-29 | 德州地平线石油科技股份有限公司 | High-temperature high-pressure corrosion-resistant expansion metal framework rubber cylinder and processing equipment thereof |
| CN116816298B (en) * | 2023-07-19 | 2024-03-19 | 德州地平线石油科技股份有限公司 | High-temperature high-pressure corrosion-resistant expansion metal framework rubber cylinder and processing equipment thereof |
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