CN114151027A - Device for preventing casing pipe from being worn - Google Patents
Device for preventing casing pipe from being worn Download PDFInfo
- Publication number
- CN114151027A CN114151027A CN202111564155.4A CN202111564155A CN114151027A CN 114151027 A CN114151027 A CN 114151027A CN 202111564155 A CN202111564155 A CN 202111564155A CN 114151027 A CN114151027 A CN 114151027A
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- CN
- China
- Prior art keywords
- abrasion
- ring
- semicircular
- drill rod
- hoop
- 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
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- 238000005299 abrasion Methods 0.000 claims abstract description 62
- 239000002184 metal Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 19
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003082 abrasive agent Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a device for preventing a sleeve from being worn, which comprises an upper hoop, an anti-abrasion ring and a lower hoop: the anti-abrasion ring is of an open-close type ring structure formed by hinging two semicircular anti-abrasion rings through a pin shaft; the anti-abrasion ring is sleeved on the drill rod, and the anti-abrasion ring and the drill rod are in clearance fit; an upper clamp is arranged above the anti-abrasion ring, and a lower clamp is arranged below the anti-abrasion ring; the upper clamp and the lower clamp are tightly matched with the drill rod to prevent the abrasion-proof ring from axially moving. The invention can avoid the excessive abrasion of the casing and the drill rod, effectively protect the casing and the drill rod and is beneficial to the smooth operation of the oil field drilling operation. The device can be directly installed on a drill rod for use, and is convenient to install and disassemble, flexible to use and safe and reliable in structure due to the adoption of the split structure. And an anti-abrasion joint is prevented from being arranged between the drill rods, so that the drilling risk is reduced, and the accident rate is reduced. The use and maintenance cost are low, fasteners such as screws, bolts and the like can be conveniently replaced, and cost reduction and efficiency improvement are facilitated.
Description
Technical Field
The invention relates to a device for preventing casing abrasion, and belongs to the technical field of well drilling casing protection.
Background
The existing casing pipe anti-abrasion technology is that an anti-abrasion joint or an anti-abrasion sleeve is installed between drill strings. The existing casing pipe abrasion-proof technology is that a first-level abrasion-proof joint is added on a drill column, safety risks exist due to the fact that first-level connection is added in the prior art, meanwhile, the price of the abrasion-proof joint is high, and drilling cost is increased. The existing wear-resistant ring is inconvenient to mount and dismount, the screw connection is unreliable, the well falling risk is easy to occur, most of wear-resistant parts are made of rubber, the wear-resistant parts cannot resist high temperature, and the wear is very serious during use. In order to solve the problems, the prior 200920054423.6 patent of 'a sleeve wear-resistant sleeve for a drill rod' discloses a structure which is difficult to install, time-consuming and labor-consuming to install, inconvenient to operate and easy to bounce and hurt people due to elastic deformation during installation. In addition, the cylindrical framework has insufficient elasticity, and the drill pipe body cannot be opened, so that the tubular framework is inconvenient to disassemble, maintain and reuse. In addition, when the tool rotates, the framework and the drill pipe body are mutually abraded although the abrasion of the sleeve is prevented. Therefore, the prior art still has shortcomings and needs to be improved.
Disclosure of Invention
The invention aims to provide a device for preventing a sleeve from being abraded, which has a simple structure and is convenient to mount and dismount, so as to solve the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a device for preventing a sleeve from being worn, which comprises an upper hoop, an anti-abrasion ring and a lower hoop: the anti-abrasion ring is of an open-close type ring structure formed by hinging two semicircular anti-abrasion rings through a pin shaft; the anti-abrasion ring is sleeved on the drill rod, and the anti-abrasion ring and the drill rod are in clearance fit; an upper clamp is arranged above the anti-abrasion ring, and a lower clamp is arranged below the anti-abrasion ring; the upper clamp and the lower clamp are tightly matched with the drill rod to prevent the abrasion-proof ring from axially moving.
In the foregoing device, the wear-resistant ring includes two semicircular wear-resistant rings; the semicircular anti-abrasion ring is composed of a metal lining and an anti-abrasion material wrapped on the surface of the metal lining; the metal lining is in a semi-cylindrical shape, two edges of the metal lining are respectively provided with a group of earrings, and the earrings on the two metal linings are arranged in a staggered way; the pin shaft penetrates through the earrings on the two metal linings to hinge the two metal linings; the wear-resistant material is wrapped on the inner circle and the outer circle of the semi-cylinder of the metal lining, except for the earring part; the wear-resistant material wrapped on the outer circular surface of the metal lining is provided with a group of axial grooves which are uniformly distributed along the circumference.
In the device, the upper clamp and the lower clamp have the same structure and are symmetrically arranged at the upper end and the lower end of the anti-abrasion ring; the upper clamp and the lower clamp are both formed by hinging two semicircular clamps through a connecting plate; one side of each semicircular hoop is provided with a group of hinge lugs, the hinge lugs on the two semicircular hoops are correspondingly arranged, and the hinge lugs on the two semicircular hoops are hinged with the hinge plate through hinge screws; the other side of each of the two semicircular hoops is provided with a group of connecting holes, the connecting hole on one semicircular hoop is a step unthreaded hole, the connecting hole on the other semicircular hoop is a threaded hole, the step unthreaded hole is provided with a fastening screw, and the fastening screw penetrates through the step unthreaded hole to be fastened and connected with the threaded hole on the other semicircular hoop.
In the device, the nut at one end of the hinge screw is a lock nut.
In the device, the fastening screw is a socket head cap screw, and the fastening screw is screwed down and then sunk into the step smooth hole.
Due to the adoption of the technical scheme, compared with the prior art, the device disclosed by the invention can avoid excessive abrasion of the casing and the drill rod, effectively protect the casing and the drill rod and is beneficial to smooth drilling operation of an oil field. The device can be directly installed on a drill rod for use, and is convenient to install and disassemble, flexible to use and safe and reliable in structure due to the adoption of the split structure. And an anti-abrasion joint is prevented from being arranged between the drill rods, so that the drilling risk is reduced, and the accident rate is reduced. The use and maintenance cost are low, fasteners such as screws, bolts and the like can be conveniently replaced, and cost reduction and efficiency improvement are facilitated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention mounted on a drill pipe;
FIG. 3 is an exploded schematic view of the wear ring;
fig. 4 is an exploded view of the upper and lower clips.
The labels in the figures are: 1-upper clamp, 2-anti-abrasion ring, 3-lower clamp, 4-semicircular anti-abrasion ring, 5-pin shaft, 6-drill rod, 7-metal lining, 8-wear-resistant material, 9-lug, 10-axial groove, 11-semicircular clamp, 12-hinged plate, 13-hinged lug, 14-hinged screw, 15-step unthreaded hole, 16-threaded hole, 17-fastening screw and 18-nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The device for preventing the casing from being worn comprises an upper clamp 1, an anti-abrasion ring 2 and a lower clamp 3, as shown in figures 1 and 2: the anti-abrasion ring 2 adopts an open-close type circular ring structure formed by hinging two semicircular anti-abrasion rings 4 through a pin shaft 5; the anti-abrasion ring 2 is sleeved on the drill rod 6, and the anti-abrasion ring 2 is in clearance fit with the drill rod 6; an upper clamp 1 is arranged above the anti-abrasion ring 2, and a lower clamp 3 is arranged below the anti-abrasion ring 2; the upper clamp 1 and the lower clamp 3 are tightly matched with a drill rod 6 to prevent the abrasion-proof ring 2 from axially moving.
As shown in fig. 3, the wear ring 2 comprises two semicircular wear rings 4; the semicircular anti-abrasion ring 4 is composed of a metal lining 7 and an anti-abrasion material 8 wrapped on the surface of the metal lining 7; the metal lining 7 is in a semi-cylindrical shape, two edges of the metal lining 7 are respectively provided with a group of earrings 9, and the earrings 9 on the two metal linings 7 are arranged in a staggered way; the pin shaft 5 penetrates through the earrings 9 on the two metal linings 7 to hinge the two metal linings 7; the wear-resistant material 8 is wrapped on the inner circle and the outer circle of the semi-cylinder of the metal lining 7 except the ear ring 9; the wear-resistant material 8 wrapped on the outer circular surface of the metal lining 7 is provided with a group of axial grooves 10 which are uniformly distributed along the circumference.
As shown in fig. 4, the upper clamp 1 and the lower clamp 3 have the same structure and are symmetrically arranged at the upper end and the lower end of the wear-resistant ring 2; the upper clamp 1 and the lower clamp 3 are both formed by hinging two semicircular clamps 11 through a hinged plate 12; one side of each semi-circular hoop 11 is provided with a group of hinge lugs 13, the hinge lugs 13 on the two semi-circular hoops 11 are correspondingly arranged, and the hinge lugs 13 on the two semi-circular hoops 11 are hinged with the hinge plates 12 through hinge screws 14; the other sides of the two semicircular hoops 11 are respectively provided with a group of connecting holes, the connecting hole on one semicircular hoop 11 is a step unthreaded hole 15, the connecting hole on the other semicircular hoop 11 is a threaded hole 16, the step unthreaded hole 15 is provided with a fastening screw 17, and the fastening screw 17 penetrates from the step unthreaded hole 15 to be fastened and connected with the threaded hole 16 on the other semicircular hoop 11. The nut 18 at one end of the hinge screw 14 is a lock nut. The fastening screw 17 is a socket head cap screw, and the fastening screw 17 is screwed down and then sinks into the step unthreaded hole 15.
The working process and principle of the present invention are further explained as follows:
the invention is shown in figure 1 and consists of an upper clamp 1, an anti-abrasion ring 2 and a lower clamp 3. As shown in fig. 2, the wear ring 2 is mounted on the drill rod 6. A gap exists between the wear-resistant ring 2 and the drill rod 6, and the wear-resistant ring 2 can rotate circumferentially relative to the drill rod 6. The upper clamp 1 and the lower clamp 3 are used for axially limiting the abrasion-proof ring 2, and the upper clamp 1 and the lower clamp 3 firmly hold the drill rod 6 and synchronously rotate with the drill rod 6; the abrasion-proof ring 2 and the drill rod 6 are in clearance fit and can freely rotate relatively, the abrasion-proof ring 2 is provided with an abrasion-proof material 8, and the outer diameter of the abrasion-proof material 8 is larger than the outer diameter of a drill rod joint and smaller than the inner diameter of a sleeve.
The wear prevention principle of the wear prevention ring 2 is as follows: in the well drilling process, install abrasionproof ring 2, last clamp 1 and lower clamp 3 on drilling rod 6, 8 external diameters of abrasive material are greater than the tool joint size on the abrasionproof ring 2, are equipped with metal inside lining 7 in the abrasive material 8, and abrasive material 8 is the nonmetal polymer special material that has high wearability and high temperature resistance, and the material hardness is less than drilling rod 6 and sheathed tube hardness again. When the drill rod 6 rotates, the abrasion-proof ring 2 does not rotate because a gap is reserved between the abrasion-proof ring 2 and the drill rod 6, and the drilling tool drills normally. When the drilling rod 6 takes place bending deformation, the abrasionproof ring 2 is greater than the tool joint external diameter because the external diameter is great, abrasionproof ring 2 can earlier with the contact friction of sleeve pipe inner wall, tool joint just can not contact the sleeve pipe like this, be equivalent to installed a blotter between drilling rod 6 and sleeve pipe steel spare, the direct contact of steel spare and the production wearing and tearing between tool joint and sleeve pipe inner wall have been avoided, the abrasive material 8 of 2 inner walls of abrasionproof ring plays the effect of protection drilling rod body, can effectively protect drilling rod and sleeve pipe.
In the device, the structure and the principle of the upper clamp 1 and the lower clamp 3 are the same, the upper clamp 1 and the lower clamp 3 are formed by connecting two semicircular hoops 11, the semicircular hoops 11 are formed by cutting a round pipe into two structures slightly smaller than the semicircular pipe from the middle, and the two semicircular hoops 11 are connected into a whole through a hinged plate 12, a hinged screw 14, a fastening screw 17 and a nut 18 to form the upper clamp 1 and the lower clamp 3. Because the two ends of the drill rod 6 are provided with the connecting joints, the drill rod 6 is of a structure with large two ends and small middle, the upper clamp 1 and the lower clamp 3 are arranged into a split structure, the inner diameters of the upper clamp 1 and the lower clamp 3 are slightly smaller than the outer diameter of the middle pipe body of the drill rod 6, and the upper clamp 1 and the lower clamp 3 can be tightly clamped on the middle pipe body of the drill rod 6 after the fastening screw 17 is screwed down. The two semicircular hoops 11 and the hinged plate 12 are hinged together at one end of the upper clamp 1 and the lower clamp 3 by two hinged screws 14 and two nuts 18 to form a hinge structure, and the hinge structure can be freely opened and closed at 150 degrees. Go up clamp 1 and clamp 3 other end down and be equipped with screw hole 16, install fastening screw 17 in the screw hole 16, can twist out fastening screw 17 during the use, open two semicircle hoops 11 and directly block behind drilling rod 16 intermediate position, again with fastening screw 17 screw in screw hole 16, because the synthetic pipe internal diameter of two semicircle hoops 11 slightly is less than and equals the body external diameter size in the middle of drilling rod 6, so go up clamp 1 and clamp 3 can tightly hoop on the body in the middle of drilling rod 6 when fastening screw 17 screws up. The nut 18 at one end of the hinge screw 14 is a lock nut, and the nut 18 does not fall off from one end of the hinge screw 14 when the drill rod is severely vibrated. Compared with the existing structure, the device of the invention has more convenient connection and safer and more reliable use process.
The anti-abrasion ring 2 is also of a split structure formed by hinging two semicircular anti-abrasion rings 4 together. The anti-abrasion ring 2 has the advantages that the metal inner lining 7 is arranged in each semicircular anti-abrasion ring 4, the ear rings 9 are arranged on two sides of each metal inner lining 7, the rest parts of the surface of each metal inner lining 7 except the ear rings 9 are wrapped by the anti-abrasion materials 8 made of non-metal high polymers with high abrasion resistance and high temperature resistance, the anti-abrasion materials 8 are distributed on the inner circle surface and the outer circle surface of the metal inner lining 7, and the anti-abrasion materials 8 have better abrasion resistance, temperature resistance and strength compared with common rubber. The anti-abrasion ring 2 is of a split structure, and is inserted into the earrings through two different pin shafts 5 to be fixedly connected. The pin shaft 5 and the inner hole of the lug ring 9 are in clearance fit to form a hinge structure and can be freely opened and closed at 150 degrees. After the wear ring 2 is mounted on the drill rod 6, another pin 5 with a handle is inserted into the ear ring 9 for fixing. The ends of the two pin shafts 5 with the large ends are uniformly upward when being installed, so that the risk of pin shaft falling into the well can be prevented.
The device can avoid excessive abrasion of the casing and the drill rod, effectively protect the casing and the drill rod and is beneficial to smooth drilling operation of an oil field. The device can be directly installed on a drill rod for use, and is convenient to install and disassemble, flexible to use and safe and reliable in structure due to the adoption of the split structure. And an anti-abrasion joint is prevented from being arranged between the drill rods, so that the drilling risk is reduced, and the accident rate is reduced. The use and maintenance cost are low, fasteners such as screws, bolts and the like can be conveniently replaced, and cost reduction and efficiency improvement are facilitated.
Claims (5)
1. A device for preventing a sleeve from being worn comprises an upper clamp (1), an anti-abrasion ring (2) and a lower clamp (3); the method is characterized in that: the anti-abrasion ring (2) is an open-close type circular ring structure formed by hinging two semicircular anti-abrasion rings (4) through a pin shaft (5); the anti-abrasion ring (2) is sleeved on the drill rod (6), and the anti-abrasion ring (2) is in clearance fit with the drill rod (6); an upper clamp (1) is arranged above the anti-abrasion ring (2), and a lower clamp (3) is arranged below the anti-abrasion ring (2); the upper clamp (1) and the lower clamp (3) are tightly matched with the drill rod (6) to prevent the abrasion-proof ring (2) from axially moving.
2. The apparatus for preventing casing wear according to claim 1, wherein: the anti-abrasion ring (2) comprises two semicircular anti-abrasion rings (4); the semicircular anti-abrasion ring (4) is composed of a metal lining (7) and an anti-abrasion material (8) wrapped on the outer surface of the metal lining (7); the metal lining (7) is in a semi-cylindrical shape, two edges of the metal lining (7) are respectively provided with a group of earrings (9), and the earrings (9) on the two metal linings (7) are arranged in a staggered mode; the pin shaft (5) penetrates through the earrings (9) on the two metal linings (7) to hinge the two metal linings (7); the wear-resistant material (8) is wrapped on the inner circle and the outer circle surfaces of the semi-cylinder of the metal lining (7) except the earrings (9); a group of axial grooves (10) which are uniformly distributed along the circumference are arranged on the wear-resistant material (8) which is wrapped on the outer circular surface of the metal lining (7).
3. The apparatus for preventing casing wear according to claim 1, wherein: the upper clamp (1) and the lower clamp (3) have the same structure and are symmetrically arranged at the upper end and the lower end of the anti-abrasion ring (2); the upper hoop (1) and the lower hoop (3) are both formed by hinging two semicircular hoops (11) through a hinging plate (12); one side of each semicircular hoop (11) is provided with a group of hinge lugs (13), the hinge lugs (13) on the two semicircular hoops (11) are correspondingly arranged, and the hinge lugs (13) on the two semicircular hoops (11) are hinged with the hinge plates (12) through hinge screws (14); the other side of the two semicircular hoops (11) is respectively provided with a group of connecting holes, wherein the connecting hole on one semicircular hoop (11) is a step unthreaded hole (15), the connecting hole on the other semicircular hoop (11) is a threaded hole (16), the step unthreaded hole (15) is provided with a fastening screw (17), and the fastening screw (17) penetrates into the threaded hole (16) on the other semicircular hoop (11) from the step unthreaded hole (15) and is fixedly connected with the threaded hole (16) on the other semicircular hoop (11).
4. The apparatus for preventing casing wear according to claim 3, wherein: the nut (18) at one end of the hinge screw (14) is a lock nut.
5. The apparatus for preventing casing wear according to claim 3, wherein: the fastening screw (17) is a socket head cap screw, and the fastening screw (17) sinks into the step unthreaded hole (15) after being screwed down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111564155.4A CN114151027A (en) | 2021-12-20 | 2021-12-20 | Device for preventing casing pipe from being worn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111564155.4A CN114151027A (en) | 2021-12-20 | 2021-12-20 | Device for preventing casing pipe from being worn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151027A true CN114151027A (en) | 2022-03-08 |
Family
ID=80451541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111564155.4A Pending CN114151027A (en) | 2021-12-20 | 2021-12-20 | Device for preventing casing pipe from being worn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151027A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6032748A (en) * | 1997-06-06 | 2000-03-07 | Smith International, Inc. | Non-rotatable stabilizer and torque reducer |
| CN201363103Y (en) * | 2009-01-13 | 2009-12-16 | 西南石油大学 | Compound anti-wear torque-reducing tool |
| CN201420513Y (en) * | 2009-04-13 | 2010-03-10 | 深圳市百勤石油技术有限公司 | Casing protecting tube for drill pipe |
| US20110114307A1 (en) * | 2009-11-13 | 2011-05-19 | Casassa Garrett C | Open hole non-rotating sleeve and assembly |
| CN102080507A (en) * | 2010-12-27 | 2011-06-01 | 中国石油化工集团公司 | Anti-abrasion device for drill pipe and casing pipe |
| CN202467696U (en) * | 2011-12-06 | 2012-10-03 | 东营市胜软石油技术开发有限公司 | Accurate anti-abrasion and torque-reduction device for well drilling pipe |
| CN203499587U (en) * | 2013-09-30 | 2014-03-26 | 范龙文 | Petroleum drill rod rapid-replacement abrasion-proof sleeve |
| CN204960823U (en) * | 2015-09-21 | 2016-01-13 | 天合石油集团汇丰石油装备股份有限公司 | Wear -resisting joint of on -rotating |
| CN208310710U (en) * | 2018-03-21 | 2019-01-01 | 西安石油大学 | A kind of deep & ultra-deep well casing wear prevention device |
| CN216665524U (en) * | 2021-12-20 | 2022-06-03 | 贵州高峰石油机械股份有限公司 | Device for preventing casing pipe from being worn |
-
2021
- 2021-12-20 CN CN202111564155.4A patent/CN114151027A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6032748A (en) * | 1997-06-06 | 2000-03-07 | Smith International, Inc. | Non-rotatable stabilizer and torque reducer |
| CN201363103Y (en) * | 2009-01-13 | 2009-12-16 | 西南石油大学 | Compound anti-wear torque-reducing tool |
| CN201420513Y (en) * | 2009-04-13 | 2010-03-10 | 深圳市百勤石油技术有限公司 | Casing protecting tube for drill pipe |
| US20110114307A1 (en) * | 2009-11-13 | 2011-05-19 | Casassa Garrett C | Open hole non-rotating sleeve and assembly |
| CN102080507A (en) * | 2010-12-27 | 2011-06-01 | 中国石油化工集团公司 | Anti-abrasion device for drill pipe and casing pipe |
| CN202467696U (en) * | 2011-12-06 | 2012-10-03 | 东营市胜软石油技术开发有限公司 | Accurate anti-abrasion and torque-reduction device for well drilling pipe |
| CN203499587U (en) * | 2013-09-30 | 2014-03-26 | 范龙文 | Petroleum drill rod rapid-replacement abrasion-proof sleeve |
| CN204960823U (en) * | 2015-09-21 | 2016-01-13 | 天合石油集团汇丰石油装备股份有限公司 | Wear -resisting joint of on -rotating |
| CN208310710U (en) * | 2018-03-21 | 2019-01-01 | 西安石油大学 | A kind of deep & ultra-deep well casing wear prevention device |
| CN216665524U (en) * | 2021-12-20 | 2022-06-03 | 贵州高峰石油机械股份有限公司 | Device for preventing casing pipe from being worn |
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