CN202673176U - Special thread casing joint connector with high resistance to squeeze - Google Patents
Special thread casing joint connector with high resistance to squeeze Download PDFInfo
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- CN202673176U CN202673176U CN 201220284050 CN201220284050U CN202673176U CN 202673176 U CN202673176 U CN 202673176U CN 201220284050 CN201220284050 CN 201220284050 CN 201220284050 U CN201220284050 U CN 201220284050U CN 202673176 U CN202673176 U CN 202673176U
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- 230000007704 transition Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 5
- 239000011324 bead Substances 0.000 abstract 7
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 201000011180 Dental Pulp Calcification Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Abstract
The utility model relates to a special thread casing joint connector with high resistance to squeeze. The special thread casing joint connector comprises a connecting hoop and a tube body. The connecting hoop and the tube body are connected through threads. An inner step column face is arranged in the middle of a connecting hoop inner wall. Standard partial trapezoidal internal threads are machined at two ends of the connecting hoop, inner dome threads are arranged at rear ends of the partial trapezoidal internal threads, standard partial trapezoidal external threads are machined on end portions of the tube body, and outer dome threads are arranged at front ends of the partial trapezoidal external threads. An inner torque circular bead and an outer torque circular bead are respectively arranged between two end faces of the inner step column face and end portions of the tube body, an end face of the inner torque circular bead concaves inwards to form an inner circular bead angle, and an end face of the outer torque circular bead protrudes outwards so as to form an outer circular bead angle. According to the special thread casing joint connector with the high resistance to squeeze, a dome thread sealing structure is added on the end portions of the standard partial trapezoidal external threads, and at the same time, a metal-to-metal circular bead sealing structure is added, so that connection strength of the connector is enhanced, and anti-squeezing performance, sealing performance, anti-bending performance, ability resisting compression load and anti-torque performance are improved.
Description
Technical field
The utility model relates to the oil well pipe screwed joints that is applied to petroleum industry, and specifically a kind of high resistance is squeezed special thread sleeve pipe jointing.
Background technology
Tubing and casing in the oil well pipe industry mainly is to couple together by nipple, form oil casing, length reaches thousands of rice, and wherein the quality of the performances such as the bonding strength of nipple, sealing performance, counter-bending ability, torque resistant performance and tensile load directly affects the quality of connection of oil well pipe.Different geologic structures needs the oil well pipe of the different forms that is threaded, to satisfy instructions for use.
Along with the development of oilfield exploitation, more and more stricter to the requirement of oil well pipe screwed joints, particularly require more and more higher to the relevant main performance index of oil well pipe.Existing API(American Petroleum Institute (API)) buttress thread joint, exist the torque resistant performance a little less than, bonding strength is low, poor sealing performance, the anti-deficiencies such as ruining ability of squeezing.Each oil well pipe processing enterprise new designs of threaded joints of the world is constantly innovated, and different helicitic texture types of attachment occurred, but still can not satisfy the instructions for use of oilfield exploitation.
Summary of the invention
The utility model provides a kind of high resistance to squeeze special thread sleeve pipe jointing for the problems referred to above, and this joint bonding strength is high, and anti-extrusion performance is high, and sealing performance and counter-bending ability are good, and incompressible load can be strong, and the torque resistant performance is high simultaneously.
According to the technical solution of the utility model: a kind of high resistance is squeezed special thread sleeve pipe jointing, comprises the box cupling and the body that are threaded connection, and the axial middle part of described box cupling inwall is provided with the interior step cylinder of ring-type; The two ends of described box cupling are processed with the inclined to one side trapezoidal internal thread of standard, described inclined to one side trapezoidal internal thread is provided with interior knuckle screw thread near the rear end of described interior step cylinder, be processed with the partially trapezoidal external screw thread of standard on the outer wall of described body end, described partially trapezoidal externally threaded front end is provided with outer dome screw thread; Be respectively arranged with shape metallic leak-proof structure between the both ends of the surface of described interior step cylinder and the end of described body, described shape metallic leak-proof structure comprises the internal torque shoulder that is arranged on the described box cupling and is arranged on outer torque shoulder on the described body, the end face of described internal torque shoulder concaves to limit and forms interior shoulder angle, the one side at described interior shoulder angle overlaps with one side of described interior knuckle screw thread, the end face of described outer torque shoulder outwards forms outer shoulder angle by protruding again, one side the overlapping of the one side at described outer shoulder angle and described outer dome screw thread.
The tapering of described interior knuckle screw thread and described outer dome screw thread, pitch and described inclined to one side trapezoidal internal thread and described partially trapezoidal externally threaded tapering, pitch are identical, its tooth depth be 0.75mm ~ 1.30mm, tooth form angle be 40 ° ~ 60 °, profile of tooth tooth wide for 2.00mm ~ 2.60mm, profile of tooth groove width be 2.00mm ~ 2.30mm.
The profile of tooth arc radius of described interior knuckle screw thread and described outer dome screw thread is that 0.50mm ~ 1.50mm, plane transition arc radius are 0.30mm ~ 0.50mm.
The tooth number of described interior knuckle screw thread and described outer dome screw thread is 1 ~ 5 tooth.
The interior shoulder angle of described internal torque shoulder is 90 ° ~ 150 °, and interior shoulder end thickness is 5.50mm ~ 12.00mm, and interior shoulder vertex radius is 0.50mm ~ 2.00mm, and interior shoulder angular vertex to shoulder plane thickness is to 1/2 of interior shoulder plane thickness at the bottom of the tooth; The outer shoulder angle value of described outer torque shoulder is greater than 0 ~ 2 ° of described interior shoulder angle value, outer shoulder end thickness is identical with described interior shoulder end thickness, outer shoulder vertex radius is 0 ~ 0.5mm greater than described interior shoulder vertex radius value, and outer shoulder summit to inboard wall of tube body thickness is that tooth top is to 1/2 of inboard wall of tube body thickness.
Technique effect of the present utility model is: the utility model has increased the knuckle screw thread hermetically-sealed construction in the end of standard buttress thread, simultaneously increased again the shoulder hermetically-sealed construction of a metal and metal, knuckle screw thread has increased the bonding strength of joint, improved anti-extrusion performance, sealing performance and counter-bending ability, the shoulder hermetically-sealed construction has increased its incompressible load-carrying ability and torque resistant performance greatly.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation after the utility model decomposes.
Fig. 3 is the tooth form figure of the dome sealing screw thread in the utility model.
Fig. 4 is the enlarged drawing of the internal torque shoulder in the utility model.
Fig. 5 is the enlarged drawing of the outer torque shoulder in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is further described.
Among Fig. 1 ~ Fig. 5, comprise box cupling 1, body 2, internal thread 3, external screw thread 4, interior knuckle screw thread 5, outer dome screw thread 6, internal torque shoulder 7, outer torque shoulder 8, middle line 9, shoulder plane 10 in the box cupling, tapering 11, pitch 12, tooth depth 13, tooth side angle 14, the profile of tooth tooth is wide by 15, profile of tooth groove width 16, profile of tooth circular arc 17, plane transition arc 18, at the bottom of the tooth to interior shoulder plane thickness 19, tooth top is to inboard wall of tube body thickness 20, interior shoulder end thickness 21, outer shoulder end thickness 22, interior shoulder summit is to shoulder plane thickness 23, outer shoulder summit is to inboard wall of tube body thickness 24, interior shoulder vertex radius 25, outer shoulder vertex radius 26, interior shoulder angle 27, outer shoulder angle 28, body 29 etc.
As shown in Figure 1 and Figure 2, the utility model is that a kind of high resistance is squeezed special thread sleeve pipe jointing, comprise the box cupling 1 and the body 2,29 that are threaded connection, box cupling 1 and body 2, the 29th are take virtual middle line 9 as benchmark, screw with internal and external threads, carry out some oil, casing strings of being connected to form with body 2 and body 29 by box cupling 1, satisfy the requirement of oil gas field production and application.
The axial middle part of box cupling 1 inwall is provided with the interior step cylinder 10 of ring-type.The length range of interior step cylinder 10 is 50 ~ 200mm, can increase bonding strength and the counter-bending ability of joint.
The two ends of box cupling 1 are processed with the inclined to one side trapezoidal internal thread 3 of standard, and trapezoidal internal thread 3 is provided with interior knuckle screw thread 5 near the rear end of interior step cylinder 10 partially.The partially trapezoidal external screw thread 4 of the standard that is processed with on the outer wall of body 2,29 ends, the front end of partially trapezoidal external screw thread 4 is provided with outer dome screw thread 6.Trapezoidal internal thread 3 adopts the API standard with partially trapezoidal external screw thread 4 partially.
As shown in Figure 3, interior knuckle screw thread 5 is identical with outer dome screw thread 6 sizes, and the tolerance difference is to reach the interference fits effect.The tapering 11 of interior knuckle screw thread 5 and outer dome screw thread 6, pitch 12 are identical with tapering, the pitch of partially trapezoidal internal thread 3 and partially trapezoidal external screw thread 4, when knuckle screw thread screws, screw freely under the guiding of buttress thread, any interference can not occur.The tooth depth 13 of interior knuckle screw thread 5 and outer dome screw thread 6 is that 40 ° ~ 60 °, profile of tooth tooth wide 15 are 2.00mm ~ 2.30mm for 2.00mm ~ 2.60mm, profile of tooth groove width 16 for 0.75mm ~ 1.30mm, tooth form angle 14.Profile of tooth circular arc 17 radiuses of interior knuckle screw thread 5 and outer dome screw thread 6 are that 0.50mm ~ 1.50mm, plane transition arc 18 radiuses are 0.30mm ~ 0.50mm.Interior knuckle screw thread 5 is 1 ~ 5 tooth with the tooth number of outer dome screw thread 6.
Adding man-hour, buttress thread should seamlessly transit when knuckle screw thread is out of shape transition, transition face length can not be greater than 1 pitch, and the tooth of its outer dome screw thread 6 count total length than the tooth of interior knuckle screw thread 5 count large (0.3 ~ 1) the individual pitch of total length apart from length, the best is the distance of 0.5 tooth, guarantees that like this it leaves enough surpluses when cooperating and can not interfere.
Again referring to Fig. 1 and Fig. 2, between the both ends of the surface of box cupling 1 interior step cylinder 10 and body 2,29 end, also be respectively arranged with shape metallic leak-proof structure.Shape metallic leak-proof structure comprises the internal torque shoulder 7 that is arranged on the box cupling 1 and is arranged on outer torque shoulder 8 on the body 2,29, the end face of internal torque shoulder 7 concaves to limit and forms interior shoulder angle 27, the one side at interior shoulder angle 27 overlaps with one side of interior knuckle screw thread 5, the end face of outer torque shoulder 8 outwards forms outer shoulder angle 28 by protruding again, one side the overlapping of the one side at outer shoulder angle 28 and outer dome screw thread 6.
As shown in Figure 4, the internal torque shoulder 7 of box cupling 1 is by consisting of to interior shoulder plane thickness 19, interior shoulder end thickness 21, interior shoulder summit to shoulder plane thickness 23, interior shoulder vertex radius 25, interior shoulder angle 27 etc. at the bottom of the tooth.At the bottom of the tooth to interior shoulder plane thickness 19 be interior shoulder end thickness 21 with tooth depth 13 with, interior shoulder end thickness 21 is 5.50mm ~ 12.00mm, interior shoulder angular vertex to shoulder plane thickness 23 is to 1/2 of interior shoulder plane thickness 19 at the bottom of the tooth, the interior shoulder angle 27 of internal torque shoulder 7 is 90 ° ~ 150 °, and interior shoulder vertex radius 25 is 0.50mm ~ 2.00mm.
As shown in Figure 5, body 2,29 outer torque shoulder 8 are to be made of tooth top to inboard wall of tube body thickness 20, outer shoulder end thickness 22, outer shoulder summit to inboard wall of tube body thickness 24, outer shoulder vertex radius 26, outer shoulder angle 28 etc.Tooth top to inboard wall of tube body thickness 20 be outer shoulder end thickness 22 with tooth depth 13 and, tooth top to inboard wall of tube body thickness 20 with identical to interior shoulder plane thickness 19 at the bottom of the tooth, to decide according to the body wall thickness, but can not surpass its corresponding dimensional requirement scope, required thickness is identical during cooperation, and it is concordant with the box cupling shoulder plane to arrive inboard wall of tube body.Outer shoulder end thickness 22 is identical with interior shoulder end thickness 21, and outer shoulder summit to inboard wall of tube body thickness 24 is that tooth top is to 1/2 of inboard wall of tube body thickness 20.Outer shoulder angle 28 value of outer torque shoulder 8 is greater than 0 ~ 2 ° of interior shoulder angle 27 value, with 0.5 ° ~ 1 ° the best, satisfies the state of plastic deformation that inside and outside shoulder causes and be issued to interference fits or interference fit state in the tight situation of machine.Outer shoulder vertex radius 26 is 0 ~ 0.5mm greater than interior shoulder vertex radius 25 values.
During the utility model operation, any end of box cupling 1 is inserted in first on the body 2, overlap and fashionablely the external screw thread of the internal thread of box cupling 1 and body 2 should be inserted in first 3 ~ 7 buttons, should be light and slow during hitch with the internal and external threads make-up then manpower screw in, till screwing when motionless with manpower, the hand-tight box cupling that spins together 1 and body 2 usefulness petroleum pipeline screw-on machine devices are carried out further machine twist and access machine and twist interference fit state when connecing.
When box cupling 1 and body 2 machine twist take over be full of screw cooperate after, knuckle screw thread 5, outer dome screw thread 6 have reached the interference fits state and have formed certain sealing in it, internal torque shoulder 7 forms interference fit with outer torque shoulder 8 simultaneously, has greatly increased the ability of its high resistance torsional performance and compressive load ability and tensile load.The position that machine is tight and torque can be made separate stipulations according to API standard operation or technical papers, after machine tightly screws any gap must not be arranged with outer torque shoulder 8 but must satisfy internal torque shoulder 7.Same fastening method closely screws its box cupling 1 and body 29 take virtual middle line 9 as benchmark, reach body 29 and body 2 by box cupling 1 carry out somely being connected to form oil, casing string satisfies the requirement of oil gas field production and application.When go into the well in the oil field, its connector machine stressed joint is one by one formed thousands of meters oil casing.
The utility model has increased the wide knuckle screw thread hermetically-sealed construction of coarse pitch denticle in the end of standard buttress thread, simultaneously increased again the shoulder hermetically-sealed construction of a metal and metal, knuckle screw thread has increased the bonding strength of joint, improved anti-extrusion performance, sealing performance and counter-bending ability, the shoulder hermetically-sealed construction has increased its incompressible load-carrying ability and torque resistant performance greatly.
Claims (5)
1. a high resistance is squeezed special thread sleeve pipe jointing, comprises the box cupling (1) and the body (2,29) that are threaded connection, and the axial middle part of described box cupling (1) inwall is provided with the interior step cylinder (10) of ring-type; It is characterized in that: the two ends of described box cupling (1) are processed with the inclined to one side trapezoidal internal thread of standard (3), described inclined to one side trapezoidal internal thread (3) is provided with interior knuckle screw thread (5) near the rear end of described interior step cylinder (10), be processed with the partially trapezoidal external screw thread of standard (4) on the outer wall of described body (2,29) end, the front end of described partially trapezoidal external screw thread (4) is provided with outer dome screw thread (6); The both ends of the surface of described interior step cylinder (10) and described body (2,29) be respectively arranged with shape metallic leak-proof structure between the end, described shape metallic leak-proof structure comprises the internal torque shoulder (7) that is arranged on the described box cupling (1) and is arranged on described body (2,29) the outer torque shoulder (8) on, the end face of described internal torque shoulder (7) concaves to limit and forms interior shoulder angle (27), the one side at described interior shoulder angle (27) overlaps with one side of described interior knuckle screw thread (5), the end face of described outer torque shoulder (8) outwards forms outer shoulder angle (28) by protruding again, the one side at described outer shoulder angle (28) with described outer dome screw thread (6) one side overlap.
2. squeeze special thread sleeve pipe jointing according to high resistance claimed in claim 1, it is characterized in that: the tapering (11) of described interior knuckle screw thread (5) and described outer dome screw thread (6), pitch (12) are identical with tapering, the pitch of described inclined to one side trapezoidal internal thread (3) and described partially trapezoidal external screw thread (4), and its tooth depth (13) is that 0.75mm ~ 1.30mm, tooth form angle (14) are that 40 ° ~ 60 °, profile of tooth tooth wide (15) are 2.00mm ~ 2.30mm for 2.00mm ~ 2.60mm, profile of tooth groove width (16).
3. squeeze special thread sleeve pipe jointing according to high resistance claimed in claim 2, it is characterized in that: profile of tooth circular arc (17) radius of described interior knuckle screw thread (5) and described outer dome screw thread (6) is that 0.50mm ~ 1.50mm, plane transition arc (18) radius are 0.30mm ~ 0.50mm.
4. squeeze special thread sleeve pipe jointing according to high resistance claimed in claim 1, it is characterized in that: described interior knuckle screw thread (5) is 1 ~ 5 tooth with the tooth number of described outer dome screw thread (6).
5. squeeze special thread sleeve pipe jointing according to high resistance claimed in claim 1, it is characterized in that: the interior shoulder angle (27) of described internal torque shoulder (7) is 90 ° ~ 150 °, interior shoulder end thickness (21) is 5.50mm ~ 12.00mm, interior shoulder vertex radius (25) is 0.50mm ~ 2.00mm, and interior shoulder angular vertex to shoulder plane thickness (23) is to 1/2 of interior shoulder plane thickness (19) at the bottom of the tooth; Outer shoulder angle (28) value of described outer torque shoulder (8) is greater than 0 ~ 2 ° of described interior shoulder angle (27) value, outer shoulder end thickness (22) is identical with described interior shoulder end thickness (21), outer shoulder vertex radius (26) is 0 ~ 0.5mm greater than described interior shoulder vertex radius (25) value, and outer shoulder summit to inboard wall of tube body thickness (24) is that tooth top is to 1/2 of inboard wall of tube body thickness (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220284050 CN202673176U (en) | 2012-06-16 | 2012-06-16 | Special thread casing joint connector with high resistance to squeeze |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220284050 CN202673176U (en) | 2012-06-16 | 2012-06-16 | Special thread casing joint connector with high resistance to squeeze |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673176U true CN202673176U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220284050 Expired - Fee Related CN202673176U (en) | 2012-06-16 | 2012-06-16 | Special thread casing joint connector with high resistance to squeeze |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733763A (en) * | 2012-06-16 | 2012-10-17 | 无锡西姆莱斯石油专用管制造有限公司 | High-extrusion resistance special threaded connection joint for sleeve pipes |
| CN116398060A (en) * | 2023-05-15 | 2023-07-07 | 山东高原油气装备有限公司 | High leakproofness petroleum casing pipe joint with self-locking function |
-
2012
- 2012-06-16 CN CN 201220284050 patent/CN202673176U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733763A (en) * | 2012-06-16 | 2012-10-17 | 无锡西姆莱斯石油专用管制造有限公司 | High-extrusion resistance special threaded connection joint for sleeve pipes |
| CN102733763B (en) * | 2012-06-16 | 2014-10-08 | 无锡西姆莱斯石油专用管制造有限公司 | High-extrusion resistance special threaded connection joint for sleeve pipes |
| CN116398060A (en) * | 2023-05-15 | 2023-07-07 | 山东高原油气装备有限公司 | High leakproofness petroleum casing pipe joint with self-locking function |
| CN116398060B (en) * | 2023-05-15 | 2023-08-18 | 山东高原油气装备有限公司 | High leakproofness petroleum casing pipe joint with self-locking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140922 Granted publication date: 20130116 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150322 Granted publication date: 20130116 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20200616 |