CN110529055A - A kind of high antitorque air-tight oil casing nipple - Google Patents
A kind of high antitorque air-tight oil casing nipple Download PDFInfo
- Publication number
- CN110529055A CN110529055A CN201910813999.4A CN201910813999A CN110529055A CN 110529055 A CN110529055 A CN 110529055A CN 201910813999 A CN201910813999 A CN 201910813999A CN 110529055 A CN110529055 A CN 110529055A
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- China
- Prior art keywords
- screw thread
- shoulder
- internal screw
- tube body
- zigzag
- Prior art date
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- 210000002445 nipple Anatomy 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 230000007704 transition Effects 0.000 claims description 12
- 238000005452 bending Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 102000011842 Serrate-Jagged Proteins Human genes 0.000 description 1
- 108010036039 Serrate-Jagged Proteins Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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
A kind of high antitorque air-tight oil casing nipple of the present invention, including the box cupling and the first tube body being connected through a screw thread, second tube body, it is characterized by: the intermediate position of box cupling inner wall is provided with shoulder cylinder in cricoid box cupling, the both ends of box cupling are machined with carrying face angle and are negative the zigzag internal screw thread at angle, the end of zigzag internal screw thread is close to being arranged internal screw thread shoulder and sealing combination structure at shoulder cylinder in box cupling, the end of the first tube body and the second tube body at corresponding internal screw thread shoulder and sealing combination structure is handled through necking, carrying face angle is formed in the first tube body and the processing of the second tube body pipe end outer wall after necking processing to be negative the zigzag external screw thread at angle, external screw thread shoulder and sealing combination structure is arranged close to endface in zigzag male ends.The present invention not only enhances the bonding strength and bending resistance of connector, and so that connector is had good hermetic seal ability, while also having excellent torsional strength.
Description
Technical field
The present invention relates to a kind of oil well pipe screwed joints applied to petroleum industry, specifically a kind of high antitorque
Air-tight oil casing nipple.
Background technique
Tubing and casing in oil well pipe industry is mainly connected by nipple, forms oil casing, wherein screw thread
The various aspects such as intensity index, sealing performance and torque resistant performance of connector connection it is more demanding.
The connector that tubing and casing uses at present is usually API connector.API joint technique is mature, interchangeability is good, but leakproofness
Can be poor, especially gas sealing ability is worse, it is not able to satisfy the exploitation of the natural gas well, meanwhile, torsional property is undesirable, frequent occurrence
The accident damaged because torque is excessive.
Just because of the defect of API connector, gradually makes oil well pipe company or oil field seek performance more excellent and reliable
Special thread connection structure.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide bonding strength height, and gas sealing ability is good, while having higher
Torsional strength a kind of high antitorque air-tight oil casing nipple.
The object of the present invention is achieved like this:
A kind of high antitorque air-tight oil casing nipple, including the box cupling and the first tube body, second being connected through a screw thread
Tube body, box cupling, the first tube body, the second tube body possess common axis, and the intermediate position of box cupling inner wall is provided with cricoid box cupling
Interior shoulder cylinder, the both ends of box cupling are machined with carrying face angle and are negative the zigzag internal screw thread at angle, and the end of zigzag internal screw thread is leaned on
Internal screw thread shoulder and sealing combination structure are set at shoulder cylinder in proximity hoop, and internal screw thread shoulder and sealing combination structure include interior
Internal screw thread pair shoulder, the main shoulder of internal screw thread are connected by the main shoulder of screw thread pair shoulder, internal screw thread and interior sealing cone, interior sealing cone
It connects；Interior sealing spherical surface is provided in the middle part of interior sealing cone；
The end of the first tube body and the second tube body at corresponding internal screw thread shoulder and sealing combination structure is handled through necking, is contracted
It is formed with carrying face angle in the first tube body and the processing of the second tube body pipe end outer wall after mouthful processing to be negative the zigzag external screw thread at angle, saw
External screw thread shoulder and sealing combination structure, external screw thread shoulder and sealing combination structure is arranged close to endface in tooth form male ends
Including the main shoulder of external screw thread, external screw thread pair shoulder and the external seal conical surface, passed through between the main shoulder of external screw thread and the external seal conical surface
Cross cylindrical surface connection.
Further, the main shoulder inclination angle of external screw thread and the main shoulder inclination angle phase of internal screw thread on the first tube body and the second tube body
Together, the main shoulder of external screw thread is identical as the thickness of the main shoulder thickness of internal screw thread, and external screw thread pair shoulder inclination angle is inclined with internal screw thread pair shoulder
Angle is identical, and external screw thread pair shoulder is identical as the thickness of internal screw thread pair shoulder.
Further, internal diameter than normal pipe reduces 1.5~2.5mm after necking, and necking length is 15~20mm, in necking
The transition angle of wall and inboard wall of tube body is not more than 7 °.
Further, the radius of interior sealing spherical surface is 45~55mm, and interior sealing cone taper is 1:10, interior sealing cone quilt
Interior sealing spherical surface is divided into two sections；The taper of the external seal conical surface is 1:10, is connected by transition cylindrical surface with the main shoulder of external screw thread.
Further, it is interior sealing spherical surface and interior sealing cone formed internal screw thread assembly seal surface total length be 10~
The external screw thread assembly seal surface total length and internal screw thread assembly seal surface overall length that 12mm, the external seal conical surface and transition cylindrical surface are formed
It spends identical.
Further, the value of zigzag internal screw thread and the externally threaded screw thread carrying face angle of zigzag is 3 °~5 °, guide surface
The value at angle is 10 °~25 °, and inclined direction is consistent, makes screw thread indention.
Further, zigzag internal screw thread and the externally threaded taper 9 of zigzag are 1:16, screw pitch 5.08mm, serrate slot
Width is 1.27~2.54mm, and tooth form tooth is wide 0.03~0.05mm smaller than groove width, and the both ends of tooth form tooth are provided with tooth form circular arc, tooth form
Arc radius is 0.20~0.76mm, the zigzag a height of 1.22~1.78mm of internal screw thread tooth of zigzag internal screw thread, outside zigzag
The zigzag external screw thread tooth height of screw thread is small 0.2~0.3mm higher than zigzag internal screw thread tooth.
Further, the length range of shoulder cylinder is 25.4~50.8mm in box cupling.
Further, the main shoulder inclination angle of the internal screw thread of the main shoulder of internal screw thread be 5 °~8 °, the main shoulder of internal screw thread with a thickness of
3.0~3.5mm, the internal screw thread pair shoulder inclination angle of internal screw thread pair shoulder are 3 °~5 °, internal screw thread pair shoulder with a thickness of 3.5~
4.5mm。。
Compared with prior art, the beneficial effects of the present invention are:
A kind of high antitorque air-tight oil casing nipple of the present invention uses saw-tooth thread and adds double reverse torque shoulders
The structure type for adding metal/metal to seal, not only enhances the bonding strength and bending resistance of connector, and have connector
Good hermetic seal ability, while also there is excellent torsional strength.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high antitorque air-tight oil casing nipple of the present invention.
Fig. 2 is the explosive view of Fig. 1.
Fig. 3 is a kind of internal screw thread tooth form figure of high antitorque air-tight oil casing nipple of the present invention.
Fig. 4 is a kind of external screw thread tooth form figure of high antitorque air-tight oil casing nipple of the present invention.
Fig. 5 is that a kind of internal screw thread shoulder of high antitorque air-tight oil casing nipple of the present invention and sealing combination structure show
It is intended to.
Fig. 6 is that a kind of external screw thread shoulder of high antitorque air-tight oil casing nipple of the present invention and sealing combination structure show
It is intended to.
Wherein:
Box cupling 1, the first tube body 2, zigzag internal screw thread 3, zigzag external screw thread 4, internal screw thread shoulder and sealing combination structure
5, shoulder cylinder 7 in external screw thread shoulder and sealing combination structure 6, box cupling, middle line 8, taper 9, screw pitch 10, tooth form groove width 11,
Tooth form tooth is wide 12, zigzag internal screw thread tooth is high 13, carrying face angle 14, guiding face angle 15, tooth form circular arc 16, zigzag external screw thread tooth
High 17, the main shoulder 18 of external screw thread, the main shoulder 19 of internal screw thread, external screw thread pair shoulder 20, internal screw thread pair shoulder 21, the external seal conical surface
22, interior sealing spherical surface 23, transition cylindrical surface 24, interior sealing cone 25, the main shoulder inclination angle 26 of external screw thread, the main shoulder inclination angle of internal screw thread
27, external screw thread pair shoulder inclination angle 28, internal screw thread pair shoulder inclination angle 29, external screw thread assembly seal surface total length 30, internal screw thread combination
Sealing surface total length 31, pipe end shrink mouth length 32, intermediate incline inclination angle 33, the second tube body 34, axis 35.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only invention a part of the embodiment, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Fig. 1-Fig. 6 is please referred to, the invention discloses a kind of high antitorque air-tight oil casing nipples, specifically in our company
Product type is PT-HTC, and a kind of high antitorque air-tight oil casing nipple includes the box cupling 1 and first being connected through a screw thread
Tube body 2, the second tube body 34, box cupling 1, the first tube body 2, the second tube body 34 possess common axis 35, box cupling 1 and the first tube body 2,
Second tube body 34 is on the basis of virtual middle line 8, and internal and external screw thread is screwed, logical with the first tube body 2 and the second tube body 34
It crosses box cupling 1 and carries out several connections formation oil, casing string, meet oil gas field and produce and use requirement.
The intermediate position of 1 inner wall of box cupling is provided with shoulder cylinder 7 in cricoid box cupling, the length of shoulder cylinder 7 in box cupling
Range is 25.4~50.8mm, it is therefore an objective to form shoulder, and possess the first tube body 2, the second tube body 34 in identical with box cupling
Diameter makes smooth fluid flow in pipe tube body.
The both ends of box cupling 1 are machined with carrying face angle and are negative the zigzag internal screw thread 3 at angle, and the end of zigzag internal screw thread 3 is leaned on
Internal screw thread shoulder and sealing combination structure 5 are set at shoulder cylinder 7 in proximity hoop, and internal screw thread shoulder and sealing combination structure 5 wrap
Include the main shoulder 19 of internal screw thread pair shoulder 21, internal screw thread and interior sealing cone 25, interior sealing cone 25 is by internal screw thread pair shoulder 21, interior
The main shoulder 19 of screw thread is connected.Interior sealing spherical surface 23 is provided in the middle part of interior sealing cone 25.The internal screw thread of the main shoulder 19 of internal screw thread
Main shoulder inclination angle 27 be 5 °~8 °, the main shoulder 19 of internal screw thread with a thickness of 3.0~3.5mm, the internal screw thread of internal screw thread pair shoulder 21
Secondary shoulder inclination angle 29 be 3 °~5 °, internal screw thread pair shoulder 21 with a thickness of 3.5~4.5mm；
The end of the first tube body 2 and the second tube body 34 at corresponding internal screw thread shoulder and sealing combination structure 5 through necking at
Reason, internal diameter reduces 1.5~2.5mm than normal pipe after necking, and necking length 32 is 15~20mm, necking inner wall and inboard wall of tube body
Transition angle 33 be not more than 7 °, necking processing after the first tube body 2 and 34 pipe end outer wall of the second tube body processing be formed with loading end
Angle is the zigzag external screw thread 4 of negative angle, and external screw thread shoulder and seal combination knot is arranged close to endface in 4 end of zigzag external screw thread
Structure 6, external screw thread shoulder and sealing combination structure 6 include the main shoulder 18 of external screw thread, external screw thread pair shoulder 20 and the external seal conical surface 22,
It is connected between the main shoulder 18 of external screw thread and the external seal conical surface 22 by transition cylindrical surface 24.On first tube body 2 and the second tube body 34
The main shoulder inclination angle 26 of external screw thread it is identical as the main shoulder inclination angle 27 of internal screw thread, the main shoulder of external screw thread 18 and the main shoulder thickness of internal screw thread
19 thickness is identical, and external screw thread pair shoulder inclination angle 28 is identical as internal screw thread pair shoulder inclination angle 29, external screw thread pair shoulder 20 and interior spiral shell
The thickness of line pair shoulder 21 is identical.
The radius of interior sealing spherical surface 23 is 45~55mm, and interior 25 taper of sealing cone is 1:10, and interior sealing cone 25 is interior
Sealing spherical surface 23 is divided into two sections；The taper of the external seal conical surface 22 is 1:10, passes through transition cylindrical surface 24 and the main shoulder 18 of external screw thread
It is connected.The internal screw thread assembly seal surface total length 31 that interior sealing spherical surface 23 and interior sealing cone 25 are formed is 10~12mm, outer close
Seal the external screw thread assembly seal surface total length 30 and internal screw thread assembly seal surface total length of the conical surface 22 and the formation of transition cylindrical surface 24
31 is identical.
As shown in Figure 3, Figure 4, the screw thread of zigzag internal screw thread 3 and zigzag external screw thread 4 carrying face angle 14 value be 3 °~
5 °, the value of guiding face angle 15 is 10 °~25 °, and inclined direction is consistent, makes screw thread indention.Zigzag internal screw thread 3 and sawtooth
The taper 9 of shape external screw thread 4 is 1:16, and screw pitch 10 is that 5.08mm, taper and screw pitch are identical as API buttress thread, tooth form groove width
11 be 1.27~2.54mm, and tooth form tooth wide 12 is 0.03~0.05mm smaller than groove width, and the both ends of tooth form tooth are provided with tooth form circular arc 16,
16 radius of tooth form circular arc is 0.20~0.76mm, and the zigzag internal screw thread tooth high 13 of zigzag internal screw thread 3 is 1.22~1.78mm,
The zigzag external screw thread tooth high 17 of zigzag external screw thread 4 13 small 0.2~0.3mm higher than zigzag internal screw thread tooth.Zigzag spiral shell
When line is by axial tensile loads, radial component will not be generated, therefore bonding strength is high, bending resistance is strong.Meanwhile in zigzag
Thread height is high slightly larger than zigzag external screw thread tooth, is conducive to store a certain number of thread compounds in thread pitch, improves spiral shell
Greasy property between line, it is not easy to damaged screw.
When operation of the present invention, any end of box cupling 1 is first screwed on the first tube body 2 or the second tube body 34, when screw-in
The external screw thread of the internal screw thread of box cupling 1 and the first tube body 2 or the second tube body 34 should first be screwed in 3~7 buttons, by internal and external threads make-up
Then manpower screws in, until when manpower screws motionless, by the hand-tight box cupling 1 spun together and the first tube body 2 or
Second tube body 34 is screwed further into interference fit state with twist-on machine.
In rundown process, zigzag external screw thread 4 and zigzag internal screw thread 3 are initially formed radial interference fit state, interior
The main shoulder 19 of screw thread starts to contact with the main shoulder 18 of external screw thread screw thread, and generates axial interference fit, shares torque wrench moment,
With further tightening, flexible deformation occurs for main shoulder, and internal screw thread pair shoulder 21 starts to contact with external screw thread pair shoulder 20, and produces
Raw axial interference fit, shares extra torque.After reaching certain torque, connector is in and screws state, interior close on box cupling 1
Radial interference fit occurs for the external seal conical surface 22 on blocking face 23 and the first tube body 2 or the second tube body 34, on the contact surface
Very high contact pressure is formed, to seal.
The present invention is provided with sawtooth thread in the end of 1 inner wall of box cupling and the first tube body 2 and the second tube body 34, increases
The bonding strength and bending resistance of connector；Torque resistant shoulder and metal/metal sealing knot are increased among pipe end and box cupling
Structure further improves the torque resistant performance and gas sealing ability of connector；Necking processing is carried out to pipe end, increases the thickness of shoulder
Degree, further improves the anti-twisting property of connector.
The processing is simple by the present invention conveniently, and use scope is wide, securely and reliably, is able to bear higher gas pressure and torsion carries
Lotus can satisfy the requirement in oil field without leaking or damaging.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.All uses
Equivalent transformation or equivalent replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Claims (9)
1. a kind of high antitorque air-tight oil casing nipple, including the box cupling being connected through a screw thread and the first tube body, the second pipe
Body, box cupling, the first tube body, the second tube body possess common axis, it is characterised in that:
The intermediate position of box cupling inner wall is provided with shoulder cylinder in cricoid box cupling, and the both ends of box cupling are machined with carrying face angle and are negative
The zigzag internal screw thread at angle, the end of zigzag internal screw thread is close to being arranged internal screw thread shoulder and sealing group at shoulder cylinder in box cupling
Close structure, internal screw thread shoulder and sealing combination structure include internal screw thread pair shoulder, the main shoulder of internal screw thread and interior sealing cone, interior close
Internal screw thread pair shoulder, the main shoulder of internal screw thread are connected by the envelope conical surface；Interior sealing spherical surface is provided in the middle part of interior sealing cone；
The end of the first tube body and the second tube body at corresponding internal screw thread shoulder and sealing combination structure is handled through necking, at necking
It is formed with carrying face angle in the first tube body and the processing of the second tube body pipe end outer wall after reason to be negative the zigzag external screw thread at angle, zigzag
External screw thread shoulder is arranged close to endface for male ends and sealing combination structure, external screw thread shoulder and sealing combination structure include
The main shoulder of external screw thread, external screw thread pair shoulder and the external seal conical surface pass through transition circle between the main shoulder of external screw thread and the external seal conical surface
Cylinder connection.
2. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that the first tube body and
The main shoulder inclination angle of external screw thread on second tube body is identical as the main shoulder inclination angle of internal screw thread, the main shoulder of external screw thread and the main shoulder of internal screw thread
The thickness of thickness is identical, and external screw thread pair shoulder inclination angle is identical as internal screw thread pair shoulder inclination angle, external screw thread pair shoulder and internal screw thread pair
The thickness of shoulder is identical.
3. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that internal diameter after necking
Reduce 1.5~2.5mm than normal pipe, necking length is 15~20mm, and the transition angle of necking inner wall and inboard wall of tube body is not more than
7°。
4. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that interior sealing spherical surface
Radius be 45~55mm, interior sealing cone taper is 1:10, and interior sealing cone is divided into two sections by interior sealing spherical surface；External seal cone
The taper in face is 1:10, is connected by transition cylindrical surface with the main shoulder of external screw thread.
5. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that interior sealing spherical surface
The internal screw thread assembly seal surface total length formed with interior sealing cone is 10~12mm, and the external seal conical surface is formed with transition cylindrical surface
External screw thread assembly seal surface total length it is identical as internal screw thread assembly seal surface total length.
6. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that spiral shell in zigzag
The value of line and the externally threaded screw thread carrying face angle of zigzag is 3 °~5 °, and the value for being oriented to face angle is 10 °~25 °, and inclined direction
Unanimously, make screw thread indention.
7. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that spiral shell in zigzag
Line and the externally threaded taper 9 of zigzag are 1:16, and screw pitch 5.08mm, tooth form groove width is 1.27~2.54mm, the wide ratio of tooth form tooth
Small 0.03~the 0.05mm of groove width, the both ends of tooth form tooth are provided with tooth form circular arc, and tooth form arc radius is 0.20~0.76mm, sawtooth
The zigzag a height of 1.22~1.78mm of internal screw thread tooth of shape internal screw thread, the externally threaded zigzag external screw thread tooth height of zigzag compare sawtooth
The high small 0.2~0.3mm of shape internal screw thread tooth.
8. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that shoulder in box cupling
The length range of cylinder is 25.4~50.8mm.
9. a kind of high antitorque air-tight oil casing nipple according to claim 1, it is characterised in that internal screw thread main
The main shoulder inclination angle of the internal screw thread of shoulder is 5 °~8 °, the main shoulder of internal screw thread with a thickness of 3.0~3.5mm, internal screw thread pair shoulder it is interior
Screw thread pair shoulder inclination angle be 3 °~5 °, internal screw thread pair shoulder with a thickness of 3.5~4.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813999.4A CN110529055A (en) | 2019-08-30 | 2019-08-30 | A kind of high antitorque air-tight oil casing nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813999.4A CN110529055A (en) | 2019-08-30 | 2019-08-30 | A kind of high antitorque air-tight oil casing nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529055A true CN110529055A (en) | 2019-12-03 |
Family
ID=68665550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910813999.4A Pending CN110529055A (en) | 2019-08-30 | 2019-08-30 | A kind of high antitorque air-tight oil casing nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529055A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352211A (en) * | 2021-12-23 | 2022-04-15 | 西安德信成科技有限责任公司 | Sealing threaded connection assembly method for oil pipe and casing pipe combination |
| CN116065973A (en) * | 2023-04-04 | 2023-05-05 | 胜利油田胜机石油装备有限公司 | Oil sleeve gas seal structure and oil sleeve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8920607D0 (en) * | 1989-09-12 | 1989-10-25 | Tri State Oil Tool Uk | Metal seal casing patch |
| CN202578554U (en) * | 2012-04-25 | 2012-12-05 | 无锡西姆莱斯石油专用管制造有限公司 | Special buttress thread oil sleeve connection joint |
| CN202788653U (en) * | 2012-07-05 | 2013-03-13 | 宝鸡石油钢管有限责任公司 | Hermetic seal thread connection device used for SEW oil casings |
| CN202946041U (en) * | 2012-12-12 | 2013-05-22 | 衡阳华菱钢管有限公司 | Zigzag air-sealed oil well pipe thread joint structure |
| CN203531780U (en) * | 2013-10-11 | 2014-04-09 | 杨林 | Highly-resistant double-circular-bead oil sleeve joint |
| CN210918913U (en) * | 2019-08-30 | 2020-07-03 | 江苏璞腾油气装备有限公司 | High-torsion-resistance air-tight seal oil casing threaded joint |
-
2019
- 2019-08-30 CN CN201910813999.4A patent/CN110529055A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8920607D0 (en) * | 1989-09-12 | 1989-10-25 | Tri State Oil Tool Uk | Metal seal casing patch |
| CN202578554U (en) * | 2012-04-25 | 2012-12-05 | 无锡西姆莱斯石油专用管制造有限公司 | Special buttress thread oil sleeve connection joint |
| CN202788653U (en) * | 2012-07-05 | 2013-03-13 | 宝鸡石油钢管有限责任公司 | Hermetic seal thread connection device used for SEW oil casings |
| CN202946041U (en) * | 2012-12-12 | 2013-05-22 | 衡阳华菱钢管有限公司 | Zigzag air-sealed oil well pipe thread joint structure |
| CN203531780U (en) * | 2013-10-11 | 2014-04-09 | 杨林 | Highly-resistant double-circular-bead oil sleeve joint |
| CN210918913U (en) * | 2019-08-30 | 2020-07-03 | 江苏璞腾油气装备有限公司 | High-torsion-resistance air-tight seal oil casing threaded joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352211A (en) * | 2021-12-23 | 2022-04-15 | 西安德信成科技有限责任公司 | Sealing threaded connection assembly method for oil pipe and casing pipe combination |
| CN116065973A (en) * | 2023-04-04 | 2023-05-05 | 胜利油田胜机石油装备有限公司 | Oil sleeve gas seal structure and oil sleeve |
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