CN202673175U - High seal special buttress thread sleeve pipe connector - Google Patents
High seal special buttress thread sleeve pipe connector Download PDFInfo
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- CN202673175U CN202673175U CN 201220266594 CN201220266594U CN202673175U CN 202673175 U CN202673175 U CN 202673175U CN 201220266594 CN201220266594 CN 201220266594 CN 201220266594 U CN201220266594 U CN 201220266594U CN 202673175 U CN202673175 U CN 202673175U
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Abstract
The utility model relates to a high seal special buttress thread sleeve pipe connector. The high seal special buttress thread sleeve pipe connector comprises a coupling and a pipe body both connected through screw threads, wherein an inner step cylindrical surface is arranged on the middle portion of the inner wall of the coupling. Standard buttress inner threads are arranged on two ends of the coupling, and inner seal threads are arranged at the back end of the buttress inner threads. Standard buttress outer threads are arranged on the end portion of the pipe body, outer seal threads are arranged at the front end of the buttress outer threads, and big circular arc crest tooth type threads are adopted by the inner seal threads and the outer seal threads. A metal seal structure is arranged between each end surface of the inner step cylindrical surface and each end portion of the pipe body, and the metal seal structure comprises an inner torque shoulder and an outer torque shoulder. A big circular arc crest tooth type thread sealing structure and a shoulder sealing structure are added on the end portion of the standard buttress threads, the connecting strength, the sealing performance, the bending resistance capacity, the compression load resistance capacity and the anti-torque performance of the connector is enhanced.
Description
Technical field
The utility model relates to the oil well pipe screwed joints that is applied to petroleum industry, specifically the special BCSG jointing of a kind of high sealability.
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 sealability special BCSG jointing for the problems referred to above, and this joint bonding strength is high, good seal performance, and incompressible load can be strong, and the torque resistant performance is high simultaneously.
According to the technical solution of the utility model: the special BCSG jointing of a kind of high sealability, comprise the box cupling and the body that are threaded connection, 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 sealing 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 the external seal screw thread, and described interior sealing thread and described external seal screw thread adopt orthodrome crest profile of tooth 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, described internal torque shoulder is formed slopely interior shoulder angle to the outside, described outer torque shoulder slopes inwardly and forms outer shoulder angle.
The tapering of described interior sealing thread and described external seal screw thread, pitch and described inclined to one side trapezoidal internal thread and described partially trapezoidal externally threaded tapering, pitch are identical, and its tooth depth is that 0.68mm ~ 1.30mm, tooth form angle are that 40 °, tooth bottom width are that 2.40mm ~ 2.55mm, space width 16 are 2.06mm ~ 2.20mm.
The tooth top arc radius of described interior sealing thread and described external seal screw thread is that arc radius is 0.35mm ~ 0.45mm at the bottom of 0.5mm ~ 1.6mm, the tooth.
The tooth number of described interior sealing thread and described external seal screw thread is 1 ~ 5 tooth.
The inner sealing surface length of described internal torque shoulder is 5 ~ 12mm, and its Surface Taper is that 1:10 ~ 1:16, interior shoulder thickness are that 4 ~ 10mm, inner vertex arc radius are that 0.5 ~ 1.5mm, interior shoulder angle are 15 ° ~ 30 °; The external seal face length degree of described outer torque shoulder is greater than described inner sealing surface length half pitch, Surface Taper is identical, outer shoulder thickness is identical with interior shoulder thickness, the outer dead centre arc radius is greater than described inner vertex arc radius 0 ~ 0.3mm, and outer shoulder angle value is less than 0 ~ 1 ° of described interior shoulder angle value.
Be provided with inner cylinder face on the inwall of described body end, described inner cylinder face links to each other with the endoporus of described body by the transition conical surface, and the length of described inner cylinder face is 5 ~ 15mm.
Technique effect of the present utility model is: the utility model has increased orthodrome crest profile of tooth threaded sealing structure in the end of standard buttress thread, simultaneously increased again the shoulder hermetically-sealed construction of a metal and metal, orthodrome crest profile of tooth screw thread has increased bonding strength, sealing performance and the counter-bending ability of joint, and the shoulder hermetically-sealed construction has increased its incompressible load-carrying ability and torque resistant performance greatly; Adopt the structure of double containment to improve joint and applied load-carrying properties in the situation in high composite force.
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 sealing 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 circular arc 18 at the bottom of box cupling 1, body 2, internal thread 3, external screw thread 4, interior sealing thread 5, external seal screw thread 6, internal torque shoulder 7, outer torque shoulder 8, middle line 9, interior step cylinder 10, tapering 11, pitch 12, tooth depth 13, tooth form angle 14, tooth bottom width 15, space width 16, tooth top circular arc 17, the tooth, inner sealing surface length 19, external seal face length degree 20, interior shoulder thickness 21, outer shoulder thickness 22, inner vertex circular arc 23, interior shoulder angle 24, outer dead centre circular arc 25, outer shoulder angle 26, inner cylinder face 27, the transition conical surface 28, body 29 etc.
As shown in Figure 1 and Figure 2, the utility model is the special BCSG jointing of a kind of high sealability, 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 sealing 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 external seal 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 sealing thread 5 and external seal screw thread 6 sizes are identical reaching the interference fits effect, and all adopt orthodrome crest profile of tooth screw thread.The tapering 11 of interior sealing thread 5 and external seal 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 orthodrome crest profile of tooth screw thread screws, screw freely under the guiding of buttress thread, any interference can not occur.The tooth depth 13 of interior sealing thread 5 and external seal screw thread 6 is that 40 °, tooth bottom width 15 are 2.06mm ~ 2.20mm for 2.40mm ~ 2.55mm, space width 16 for 0.68mm ~ 1.30mm, tooth form angle 14.Tooth top circular arc 17 radiuses of interior sealing thread 5 and external seal screw thread 6 are that circular arc 18 radiuses are 0.35mm ~ 0.45mm at the bottom of 0.5mm ~ 1.6mm, the tooth, and tooth top circular arc 17 radiuses are take 1.0mm as best.Interior sealing thread 5 is 1 ~ 5 tooth with the tooth number of external seal screw thread 6.
Adding man-hour, buttress thread should seamlessly transit during to circular arc tooth top screw thread transition deformation, and transition face length can not surpass the length of 1 pitch.The total length of buttress thread and circular arc tooth top screw thread can be by reducing or increase buttress thread tooth number, also can satisfy by reducing or increase circular arc tooth top ridge number the total length requirement of body 2, the processing of 29 ends, but the tooth number of its increase or minimizing can not surpass 4 teeth, and the processing of its box cupling 1 screw thread is identical.
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, and internal torque shoulder 7 is formed slopely interior shoulder angle 24 to the outside, and outer torque shoulder 8 slopes inwardly and forms outer shoulder angle 26.
As shown in Figure 4, the internal torque shoulder 7 of box cupling 1 is made of inner sealing surface length 19, interior shoulder thickness 21, inner vertex circular arc 23, interior shoulder angle 24 etc.Inner sealing surface length 19 is 5 ~ 12mm, and its Surface Taper is that 1:10 ~ 1:16, interior shoulder thickness 21 are that 4 ~ 10mm, inner vertex circular arc 23 radiuses are that 0.5 ~ 1.5mm, interior shoulder angle 24 are 15 ° ~ 30 °;
As shown in Figure 5, body 2,29 outer torque shoulder 8 are to be made of external seal face length degree 20, outer shoulder thickness 22, outer dead centre circular arc 24, outer shoulder angle 26, inner cylinder face 27, the transition conical surface 28 etc.The external seal face length degree 20 of outer torque shoulder 8 is greater than inner sealing surface length 19 half pitch, and Surface Taper is identical, does not interfere with external seal screw thread 6 sizes closely cooperating under high pulling torque with sealing thread 5 in satisfying.Outer shoulder thickness 22 is identical with interior shoulder thickness 21, with after satisfying it and closely cooperating on same plane, can not cause oil gas turbulent phenomenon in body, reach smoothly and pass through smoothly.Outer dead centre circular arc 24 radiuses are greater than inner vertex circular arc 23 radiuses 0 ~ 0.3mm, and to satisfy inside and outside shoulder in the tight situation of machine, the state of plastic deformation that inside and outside summit circular arc causes when cooperating is issued to interference fits or interference fit state.Outer shoulder angle 26 values are less than 0 ~ 1 ° of interior shoulder angle 24 value, with 0.5 ° of the best, satisfy 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.
Inwall in body 2,29 ends is provided with inner cylinder face 27, and inner cylinder face 27 links to each other by the transition conical surface 28 and body 2,29 endoporus, and the length of inner cylinder face 27 is 5 ~ 15mm, and the length of the transition conical surface 28 is not done requirement.The length of the length of inner cylinder face 27 and the transition conical surface 28 can stipulate according to body 2,29 wall thickness, can remain on same plane and seamlessly transit with interior step cylinder 10 to get final product after closely cooperating.
During the utility model operation, first external threaded surface on the body 2 is evenly smeared one deck thread compound, 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 ~ 5 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, sealing thread 5, external seal screw thread 6 have reached the interference fits state and have formed certain sealing in it, shoulder thickness 21 has reached interference fit with outer shoulder thickness 22 simultaneously, has greatly increased the ability of its high resistance torsional performance and compressive load ability and tensile load.Simultaneously both external diameters of inner sealing surface length 18 and external seal face length degree 19 form radial interference fit, greatly increase the sealing performance of its cooperation.The position that machine is tight and torque can be made separate stipulations according to API standard operation or technical papers, but shoulder thickness 21 must not have any slit with outer shoulder thickness 22 in must satisfying after machine tightly screws.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 orthodrome crest profile of tooth threaded sealing structure in the end of standard buttress thread, simultaneously increased again the shoulder hermetically-sealed construction of a metal and metal, orthodrome crest profile of tooth screw thread has increased bonding strength, sealing performance and the counter-bending ability of joint, and the shoulder hermetically-sealed construction has increased its incompressible load-carrying ability and torque resistant performance greatly; Adopt the structure of double containment to improve joint and applied load-carrying properties in the situation in high composite force.The utility model be fit to very much dark/ultradeep well, in/hydraulic oil, gas well use.
Claims (6)
1. the special BCSG jointing of high sealability 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 sealing 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 external seal screw thread (6), and described interior sealing thread (5) adopts orthodrome crest profile of tooth screw thread with described external seal screw thread (6); Be respectively arranged with shape metallic leak-proof structure between the end of the both ends of the surface of described interior step cylinder (10) and described body (2,29), 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 outer torque shoulder (8) on the described body (2,29), described internal torque shoulder (7) is formed slopely interior shoulder angle (24) to the outside, described outer torque shoulder (8) slopes inwardly and forms outer shoulder angle (26).
2. according to the special BCSG jointing of high sealability claimed in claim 1, it is characterized in that: the tapering (11) of described interior sealing thread (5) and described external seal 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 0.68mm ~ 1.30mm, tooth form angle (14) are that 40 °, tooth bottom width (15) are 2.06mm ~ 2.20mm for 2.40mm ~ 2.55mm, space width (16).
3. according to the special BCSG jointing of high sealability claimed in claim 2, it is characterized in that: tooth top circular arc (17) radius of described interior sealing thread (5) and described external seal screw thread (6) is that circular arc (18) radius is 0.35mm ~ 0.45mm at the bottom of 0.5mm ~ 1.6mm, the tooth.
4. according to the special BCSG jointing of high sealability claimed in claim 1, it is characterized in that: described interior sealing thread (5) is 1 ~ 5 tooth with the tooth number of described external seal screw thread (6).
5. according to the special BCSG jointing of high sealability claimed in claim 1, it is characterized in that: the inner sealing surface length (19) of described internal torque shoulder (7) is 5 ~ 12mm, and its Surface Taper is that 1:10 ~ 1:16, interior shoulder thickness (21) are that 4 ~ 10mm, inner vertex circular arc (23) radius are that 0.5 ~ 1.5mm, interior shoulder angle (24) are 15 ° ~ 30 °; The external seal face length degree (20) of described outer torque shoulder (8) is greater than described inner sealing surface length (19) half pitch, Surface Taper is identical, outer shoulder thickness (22) is identical with interior shoulder thickness (21), outer dead centre circular arc (24) radius is greater than described inner vertex circular arc (23) radius 0 ~ 0.3mm, and outer shoulder angle (26) value is less than 0 ~ 1 ° of described interior shoulder angle (24) value.
6. according to the special BCSG jointing of high sealability claimed in claim 1, it is characterized in that: be provided with inner cylinder face (27) on the inwall of described body (2,29) end, described inner cylinder face (27) links to each other by the endoporus of the transition conical surface (28) with described body (2,29), and the length of described inner cylinder face (27) is 5 ~ 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220266594 CN202673175U (en) | 2012-06-06 | 2012-06-06 | High seal special buttress thread sleeve pipe connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220266594 CN202673175U (en) | 2012-06-06 | 2012-06-06 | High seal special buttress thread sleeve pipe connector |
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| Publication Number | Publication Date |
|---|---|
| CN202673175U true CN202673175U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220266594 Expired - Fee Related CN202673175U (en) | 2012-06-06 | 2012-06-06 | High seal special buttress thread sleeve pipe connector |
Country Status (1)
| Country | Link |
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| CN (1) | CN202673175U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN102720439A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-tightness buttress thread sleeve joint |
| CN103397853A (en) * | 2013-08-06 | 2013-11-20 | 天津钢管集团股份有限公司 | Special air sealing threaded connector structure for casing pipe |
-
2012
- 2012-06-06 CN CN 201220266594 patent/CN202673175U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN102720439A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-tightness buttress thread sleeve joint |
| CN102720439B (en) * | 2012-06-16 | 2015-09-02 | 无锡西姆莱斯石油专用管制造有限公司 | High sealability BCSG jointing |
| CN103397853A (en) * | 2013-08-06 | 2013-11-20 | 天津钢管集团股份有限公司 | Special air sealing threaded connector structure for casing pipe |
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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 |
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| 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 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20200606 |
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| CF01 | Termination of patent right due to non-payment of annual fee |