CN207004443U - A kind of nipple - Google Patents
A kind of nipple Download PDFInfo
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- CN207004443U CN207004443U CN201720644567.1U CN201720644567U CN207004443U CN 207004443 U CN207004443 U CN 207004443U CN 201720644567 U CN201720644567 U CN 201720644567U CN 207004443 U CN207004443 U CN 207004443U
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- box cupling
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Abstract
A kind of nipple is disclosed herein, includes the body and box cupling of threaded connection；Box cupling is both ends symmetrical structure, and box cupling is disposed with internal thread, the first box cupling seal section, the second box cupling seal section and box cupling torque shoulder face by end to centre；Body is disposed with body torque shoulder face, the second body seal section, the first body seal section and external screw thread by end to centre；External screw thread is connected with screw-internal thread fit, first box cupling seal section and the first body seal section, which are connected, forms the first sealing mechanism, second box cupling seal section and the second body seal section, which are connected, forms the second sealing mechanism, and box cupling torque shoulder face is connected with body torque shoulder face；The application can be applied to oil well pipe screwed joints technical field, it can effectively overcome defect present in prior art using the application, can effectively solve the problem that the defects of thread gluing, seal failure, torque shoulder shear fails, joint dropout easily occurs in nipple in ultra-deep Oil/gas Well.
Description
Technical field
The application relates to, but are not limited to oil well pipe screwed joints technical field, especially a kind of nipple.
Background technology
In the prior art, tubing and casing is indispensable special tubing during oil gas drilling, and the quality of its quality is directly
Have influence on the success or failure of drilling operation and the life-span of Oil/gas Well.Wherein, nipple is as the connecting portion between tubing and casing, with oil
Casing string bears to stretch together, compressed for a long time in Oil/gas Well, the test of combined stress caused by internal pressure etc..
In recent years, with the development of China Petroleum, oil, pneumatic drill well environment are increasingly harsh, particularly deep-well, ultra-deep
Well, high-pressure gas well, the exploitation of horizontal well, extended reach well, hot injection-production well, higher want is proposed to the performance of tubing and casing
Ask.For API routines oil sleeve joint because sealing and intensity are undertaken by screw thread pair, it can not meet that high sealing, high intensity are complicated
The requirement of hole condition.
In addition, conventional air-tight seal screw joint, more using single-stage metallic sealing section as primary seal, this class formation is not
Foot part is that tubing and casing can bear larger combined load, single-stage sealing surface or torque shoulder in underground work once being damaged or sending out
Raw larger deformation, the sealability of joint will be reduced substantially, or even failure accidents occur.
Therefore, for the severe operating mode of ultra-deep Oil/gas Well, need to develop a kind of Novel threaded joint at present, it is desirable to use
Oil-well pipe joint in ultra-deep Oil/gas Well have higher gas sealing ability, bonding strength and anti-combined load ability.
Utility model content
The technical problem that the application solves is to provide a kind of nipple, can effectively overcome and be lacked present in prior art
Fall into, can effectively solve the problem that in ultra-deep Oil/gas Well that nipple thread gluing, seal failure easily occurs, torque shoulder shear fails, connect
The defects of head is threaded off；Further, additionally it is possible to improve nipple and carried in interior external pressure, bending load, compressive load and stretching
There is more reliable bonding strength and sealing property under the complex working conditions such as lotus.
In order to solve the above technical problems, this application provides the body and box cupling of a kind of nipple, including threaded connection；
The box cupling is both ends symmetrical structure, and the box cupling is disposed with internal thread, the first box cupling by end to centre
Seal section, the second box cupling seal section and box cupling torque shoulder face；The body is disposed with body moment of torsion by end to centre
Circular bead surface, the second body seal section, the first body seal section and external screw thread；
The external screw thread is connected with screw-internal thread fit, and the first box cupling seal section and the first body seal section are connected
The first sealing mechanism is formed, the second box cupling seal section and the second body seal section, which are connected, forms the second sealing mechanism,
The box cupling torque shoulder face is connected with body torque shoulder face.
Above-mentioned nipple, can also have following features,
The first box cupling seal section is ball face sealing section, and the first body seal section is cylinder seal section.
Above-mentioned nipple, can also have following features,
The second box cupling seal section is inner conical surface seal section, and the second body seal section is male cone (strobilus masculinus) seal section.
Above-mentioned nipple, can also have following features,
The internal thread, inner conical surface seal section, box cupling torque shoulder face and the external screw thread, male cone (strobilus masculinus) seal section, body
Torque shoulder face forms axially interference fit attachment structure.
Above-mentioned nipple, can also have following features,
The ball face sealing section, inner conical surface seal section and the cylinder seal section, male cone (strobilus masculinus) seal section form radial interference
Mating connection structure.
Above-mentioned nipple, can also have following features,
It is additionally provided with First Transition face between the second box cupling seal section and the box cupling torque shoulder face, described second
The second transition face is correspondingly arranged between body seal section and the body torque shoulder face.
Above-mentioned nipple, can also have following features,
The First Transition face is Inner arc transition face, and second transition face is external arc transition face.
Above-mentioned nipple, can also have following features,
The body torque shoulder face, the angle of inclination in box cupling torque shoulder face are -19 °~-17 °.
Above-mentioned nipple, can also have following features,
Conical surface seal, the cone angle of the conical surface seal are formed between the inner conical surface seal section and the male cone (strobilus masculinus) seal section
For 20 °~25 °, the radius of the ball face sealing section is 4mm~9mm, the internal diameter of the body and the interlude of the box cupling
Internal diameter is identical.
Above-mentioned nipple, can also have following features,
The external screw thread is disposed as buttress thread, the angle of inclination of the spigot surface of the buttress thread with internal thread
For 9 °~11 °, the angle of inclination of the loading end of the buttress thread is -6 °~-4 °, and the tooth of the internal thread is tall and big in outer spiral shell
The tooth of line is high.
Above-mentioned nipple, can also have following features,
The radius of the Inner arc transition face is 0.4mm~0.8mm, the radius of the external arc transition face for 0.2mm~
0.4mm。
The application above-mentioned technical proposal has the advantages that：
Compared to prior art, the above-mentioned air-tight seal screw joint of the utility model can meet hyperbar and containing Korrosionsmedium
Harsh operating mode, in axial tension, compression, reverse, the effect of the load combinations such as interior external pressure is lower with stronger bonding strength, sealing
Performance and antifatigue failure ability, while there is anti-galling, anti-dropout, the anti-premium properties for crossing moment of torsion.
Further, the utility model can be formed in nipple by above-mentioned first sealing mechanism, the second sealing mechanism
The two-stage sealing in portion, can effectively improve the overall tightness stabilizability of nipple, and then can effectively ensure that it multiple
Still there is higher structural stability under general labourer's condition.
Further, the utility model can specifically pass through closely matching somebody with somebody between above-mentioned ball face sealing section and cylinder seal section
Close, the first sealing mechanism that can be formed inside nipple；Can by above-mentioned inner conical surface seal section and male cone (strobilus masculinus) seal section it
Between tight fit, the second sealing mechanism that can be formed inside nipple；Above-mentioned sphere/cylinder sealing structure and the conical surface/
Conical surface sealing structure is combined, and can ensure good seal performance of the nipple under Action of Combined Loads.
Further, the utility model can connect knot with radial interference fit by the above-mentioned attachment structure that is axially interference fitted
The setting of structure, the connective stability and bonding strength of nipple can be effectively improved, can effectively ensure that above-mentioned screw thread connects
Structural stability of the head under bad working environments.
Further, the utility model can pass through the setting of above-mentioned First Transition face and the second transition face, using the teaching of the invention it is possible to provide give
The deformation sustained release space of nipple, i.e., above-mentioned deformation Free up Memory is to enclose structure by Inner arc transition face and external arc transition face
Into a closed cavity.The setting in above-mentioned deformation sustained release space, enables to conical surface seal section and torque shoulder face larger
In the case of the magnitude of interference, deformation release is obtained, alleviates stress concentration phenomenon, can effectively prevent sealing structure from producing surrender and losing
Effect.
Further, the torque shoulder face of above-mentioned optimization angle provided by the utility model, there is stronger anti-torsion energy excessively
Power, at the same it is insensitive to axial load, it can remain to keep higher sealing property in the case where axial load is larger；It is above-mentioned
After internal and external threads screw, the internal diameter and box cupling internal diameter of body flush, and can effectively reduce tubular body turbulent flow phenomenon, avoid in internal diameter
Pressure oscillation is produced at change stress is impacted to body, improve the stress corrosion resistant ability of nipple.
Further, above-mentioned screw thread provided by the utility model is a kind of barb type designed based on buttress thread
Screw thread, it can effectively improve the anti-slip ability of nipple, and internal and external threads rotation is with after, external screw thread tooth top and internal thread bottom of the tooth
And not in contact with can reduce the stress of screw thread, prevent screw thread from producing thread gluing phenomenon, can effectively ensure that the structure of nipple is steady
It is qualitative.
Other features and advantage will illustrate in the following description, also, partly become from specification
Obtain it is clear that or being understood by implementing the utility model embodiment.The purpose of the application and other advantages can by
Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical scheme, and a part for constitution instruction, with this
The embodiment of application is used for the technical scheme for explaining the application together, does not form the limitation to technical scheme.
Fig. 1 is the structural representation of the utility model embodiment one；
Fig. 2 is the box cupling partial schematic diagram in the utility model embodiment one；
Fig. 3 is the body partial schematic diagram in the utility model embodiment one；
Fig. 4 is the buttress thread partial schematic diagram in the utility model embodiment one；
Fig. 5 is the torque shoulder face partial schematic diagram in the utility model embodiment one；
Illustrate：
1- bodys, 2- box cuplings, 3- internal threads, 4- ball face sealing sections, 5- inner conical surface seal sections, 6- Inner arc transition faces, 7-
Box cupling torque shoulder face, 8- external screw threads, 9- cylinder seal sections, 10- male cone (strobilus masculinus) seal sections, 11- external arc transition faces, 12- bodys
Torque shoulder face, 13- threaded connection sections.
Embodiment
Embodiments herein is described in detail below in conjunction with accompanying drawing.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Embodiment one：
With reference to shown in Fig. 1, the utility model embodiment one provides a kind of nipple, includes the body 1 of threaded connection
With box cupling 2；With reference to shown in Fig. 2, box cupling 2 is both ends symmetrical structure, and box cupling 2 is disposed with internal thread 3, by end to centre
One box cupling seal section, the second box cupling seal section and box cupling torque shoulder face 7；With reference to shown in Fig. 3, body 1 by end to centre according to
It is secondary to be provided with body torque shoulder face 12, the second body seal section, the first body seal section and external screw thread 8.
In concrete operations, above-mentioned external screw thread 8 is connected with internal thread 3, and the first box cupling seal section and the first body seal
Section, which is connected, forms the first sealing mechanism, and the second box cupling seal section and the second body seal section are connected and form the second sealing
Mechanism, box cupling torque shoulder face 7 are connected with body torque shoulder face 12.
Compared with prior art, can be formed by above-mentioned first sealing mechanism, the second sealing mechanism inside nipple
Two-stage seals, and can effectively improve the overall tightness stabilizability of nipple, and then can effectively ensure that it in complicated work
Still there is higher structural stability under condition.
Preferably, in the present embodiment, above-mentioned first box cupling seal section is ball face sealing section 4, and the first body seal section is post
Face seal section 9；Further, the second box cupling seal section is inner conical surface seal section 5, and the second body seal section is male cone (strobilus masculinus) seal section
10。
In concrete operations, it be able to can be formed by the tight fit between above-mentioned ball face sealing section 4 and cylinder seal section 9
The first sealing mechanism inside nipple；Can be by close between above-mentioned inner conical surface seal section 5 and male cone (strobilus masculinus) seal section 10
Coordinate, the second sealing mechanism that can be formed inside nipple；Above-mentioned sphere/cylinder sealing structure and the conical surface/conical surface seal
Structure is combined, and can ensure good seal performance of the nipple under Action of Combined Loads.
Preferably, in the present embodiment, above-mentioned internal thread 3, inner conical surface seal section 5, box cupling torque shoulder face 7 and external screw thread 8,
Male cone (strobilus masculinus) seal section 10, body torque shoulder face 12 form axially interference fit attachment structure；Above-mentioned ball face sealing section 4, inner cone
Face seal section 5 and cylinder seal section 9, male cone (strobilus masculinus) seal section 10 form radial interference fit attachment structure.
In concrete operations, the setting of above-mentioned axially interference fit attachment structure and radial interference fit attachment structure can
The connective stability and bonding strength of nipple are effectively improved, can effectively ensure that above-mentioned nipple under bad working environments
Structural stability.
Preferably, in the present embodiment, first is additionally provided between above-mentioned second box cupling seal section and box cupling torque shoulder face 7
Transition face, the second transition face is correspondingly arranged between the second body seal section and body torque shoulder face 12.
In concrete operations, above-mentioned First Transition face is preferably Inner arc transition face 6, and the second transition face is preferably external arc mistake
Cross face 11；Above-mentioned First Transition face and the setting of the second transition face, using the teaching of the invention it is possible to provide to nipple deformation be sustained space, i.e., on
It is to enclose form closed cavity by Inner arc transition face 6 and external arc transition face 11 to state deformation Free up Memory.Above-mentioned change
Shape is sustained the setting in space, enables to conical surface seal section and torque shoulder face to be deformed in the case of the larger magnitude of interference
Release, alleviate stress concentration phenomenon, can effectively prevent sealing structure from producing surrender failure.
In the present embodiment, when body 1 and box cupling 2 screw pretension, internal thread 3 and external screw thread 8 at threaded connection section 13
Start to engage, with the increase of torque wrench moment, male cone (strobilus masculinus) seal section 10 and inner conical surface seal section 5 contact, cylinder seal section 9 and ball
Face seal section 4 contacts, and primary seal can produce certain magnitude of interference；Finally, box cupling torque shoulder face 7 and body torque shoulder face 12
Start to contact.With the continuous twist-on of internal thread 3 and external screw thread 8, the sealing surface magnitude of interference constantly increases, until moment of torsion reaches setting
Torque wrench moment；Now, above-mentioned torque shoulder face and conical surface seal section are respectively provided with the larger magnitude of interference, enable to the stress collection of this section
Middle phenomenon can slowly be discharged, effectively to alleviate stress concentration phenomenon by deformation.
The radius of above-mentioned Inner arc transition face 6 is 0.4mm~0.8mm, the radius of external arc transition face 11 for 0.2mm~
0.4mm。
In the present embodiment, the radius of above-mentioned Inner arc transition face 6 is preferably 0.6mm, and the radius of external arc transition face 11 is excellent
Elect 0.3mm as；By the setting of the Inner arc transition face 6 and external arc transition face 11 of above-mentioned preferred size, can effectively meet
The sustained release of the stress concentration of torque shoulder face and conical surface seal section needs.
The angle of inclination in above-mentioned tubular body torque shoulder face 12 and box cupling torque shoulder face 7 is -19 °~-17 °, ball face sealing
The radius of section 4 is 4mm~9mm, conical surface seal is formed between inner conical surface seal section 5 and male cone (strobilus masculinus) seal section 10, the conical surface is close
The cone angle of envelope is 20 °~25 °, and the internal diameter of body 1 is identical with the internal diameter of the interlude of box cupling 2.
In the present embodiment, as shown in figure 5, the angle of inclination in above-mentioned tubular body torque shoulder face and box cupling torque shoulder face is preferred
For -18 °, the radius of above-mentioned ball face sealing section 4 is preferably 6mm, and the cone angle of inner conical surface seal section 5 and male cone (strobilus masculinus) seal section 10 is preferred
For 22 °；The torque shoulder face of above-mentioned -18 ° of optimization angle has stronger anti-torsion ability, while excessively unwise to axial load
Sense, it can remain to keep higher sealing property in the case where axial load is larger；After above-mentioned internal and external threads 8 screw, body 1
Internal diameter and the internal diameter of box cupling 2 flush, can effectively reduce the internal turbulence phenomenon of body 1, avoid at internal diameter change produce pressure wave
It is dynamic that stress is impacted to body 1, improve the stress corrosion resistant ability of nipple.
Above-mentioned external screw thread 8 and internal thread 3 are in barb-like buttress thread, the inclination of the spigot surface of buttress thread
Angle is 9 °~11 °, and the angle of inclination of the loading end of buttress thread is -6 °~-4 °, and the tooth of internal thread 3 is tall and big in external screw thread 8
Tooth it is high.
In the present embodiment, as shown in figure 4, the angle of inclination of the spigot surface of above-mentioned buttress thread is preferably 10 °, it is partially trapezoidal
The angle of inclination of the loading end of screw thread is preferably -5 °, and the high tooth of external screw thread 8 is preferably 1mm, and the high tooth of internal thread 3 is preferably 1.2mm,
External screw thread 8 and 1: 16 is both preferably with the taper of internal thread 3, the pitch of screw thread is preferably 6 teeth/in；Above-mentioned screw thread is with partially terraced
A kind of barb type screw thread designed based on shape screw thread, its loading end are preferably -5 ° of degree, can effectively improve the anti-of nipple
Slippage ability, the rotation of internal and external threads 8 and after, the tooth top of external screw thread 8 and the bottom of the tooth of internal thread 3 and not in contact with, the stress of screw thread can be reduced,
Prevent screw thread from producing thread gluing phenomenon, can effectively ensure that the structural stability of nipple.
Preferably, above-mentioned screw thread tooth top/tooth root is oriented parallel to body axis direction, above-mentioned to be preferably provided with enabling to pipe
Screw thread between body 1 and box cupling 2 is easier to button, is not easy thread alternating；Meanwhile also can largely reduce thread abrasion and
The risk cohered；Further, the surface of above-mentioned screw thread is preferably QPQ processing surface, by above-mentioned Metal Surface Modification Technique
The thread surface of processing, can greatly improve the anti-galling ability of its own, and then can effectively improve the structure of nipple
Stability.
Embodiment two：
The utility model embodiment two provides a kind of nipple, and agent structure is similar with embodiment one, also including spiral shell
The body and box cupling of line connection；Specific setting on agent structure refers to the record in embodiment one, is intended to illustrate herein
Both differences.
In the present embodiment, the radius of above-mentioned Inner arc transition face is preferably 0.8mm, and the radius of external arc transition face is preferably
0.4mm；By the setting of the Inner arc transition face and external arc transition face of above-mentioned preferred size, it also can effectively meet moment of torsion platform
The sustained release of the stress concentration of shoulder face and conical surface seal section needs.
In the present embodiment, the angle of inclination in above-mentioned tubular body torque shoulder face and box cupling torque shoulder face is preferably -17 °, on
The radius for stating ball face sealing section is preferably 9mm, and the cone angle of inner conical surface seal section and male cone (strobilus masculinus) seal section is preferably 25 °；Above-mentioned-
The torque shoulder face of 17 ° of angle also there is necessarily anti-to cross torsion ability, can also be remained in the case where axial load is larger
Keep higher sealing property.
In the present embodiment, the angle of inclination of the spigot surface of above-mentioned buttress thread is preferably 11 °, the carrying of buttress thread
The angle of inclination in face is preferably -4 °, and high external screw thread tooth is preferably 1mm, and high internal thread tooth is preferably 1.3mm；It is above-mentioned to be preferably provided with
Inclined trapezoid spiral, can also effectively improve the anti-slip ability of nipple, and can effectively ensure that the knot of nipple
Structure stability.
In conjunction with the embodiments one, embodiment two is understood：The above-mentioned air-tight seal screw joint of the utility model can meet hyperbar and
Harsh operating mode containing Korrosionsmedium, in axial tension, compression, reverse, the load combinations effect such as interior external pressure is lower with stronger
Bonding strength, sealing property and antifatigue failure ability, while there is anti-galling, anti-dropout, the anti-premium properties for crossing moment of torsion.
Further, the utility model can be formed in nipple by above-mentioned first sealing mechanism, the second sealing mechanism
The two-stage sealing in portion, can effectively improve the overall tightness stabilizability of nipple, and then can effectively ensure that it multiple
Still there is higher structural stability under general labourer's condition.
Further, the utility model can specifically pass through closely matching somebody with somebody between above-mentioned ball face sealing section and cylinder seal section
Close, the first sealing mechanism that can be formed inside nipple；Can by above-mentioned inner conical surface seal section and male cone (strobilus masculinus) seal section it
Between tight fit, the second sealing mechanism that can be formed inside nipple；Above-mentioned sphere/cylinder sealing structure and the conical surface/
Conical surface sealing structure is combined, and can ensure good seal performance of the nipple under Action of Combined Loads.
Further, the utility model can connect knot with radial interference fit by the above-mentioned attachment structure that is axially interference fitted
The setting of structure, the connective stability and bonding strength of nipple can be effectively improved, can effectively ensure that above-mentioned screw thread connects
Structural stability of the head under bad working environments.
Further, the utility model can pass through the setting of above-mentioned First Transition face and the second transition face, using the teaching of the invention it is possible to provide give
The deformation sustained release space of nipple, i.e., above-mentioned deformation Free up Memory is to enclose structure by Inner arc transition face and external arc transition face
Into a closed cavity.The setting in above-mentioned deformation sustained release space, enables to conical surface seal section and torque shoulder face larger
In the case of the magnitude of interference, deformation release is obtained, alleviates stress concentration phenomenon, can effectively prevent sealing structure from producing surrender and losing
Effect.
Further, the torque shoulder face of above-mentioned optimization angle provided by the utility model, there is stronger anti-torsion energy excessively
Power, at the same it is insensitive to axial load, it can remain to keep higher sealing property in the case where axial load is larger；It is above-mentioned
After internal and external threads screw, the internal diameter and box cupling internal diameter of body flush, and can effectively reduce tubular body turbulent flow phenomenon, avoid in internal diameter
Pressure oscillation is produced at change stress is impacted to body, improve the stress corrosion resistant ability of nipple.
Further, above-mentioned screw thread provided by the utility model is a kind of barb type designed based on buttress thread
Screw thread, it can effectively improve the anti-slip ability of nipple, and internal and external threads rotation is with after, external screw thread tooth top and internal thread bottom of the tooth
And not in contact with can reduce the stress of screw thread, prevent screw thread from producing thread gluing phenomenon, can effectively ensure that the structure of nipple is steady
It is qualitative.
In the description of the present application, term " installation ", " connected ", " connection ", " fixation " etc. all should be interpreted broadly, example
Such as, " connection " can be fixedly connected or be detachably connected, or be integrally connected；Can be joined directly together, can also
It is indirectly connected by intermediary.For the ordinary skill in the art, above-mentioned art can be understood as the case may be
The concrete meaning of language in this application.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the application
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with
Suitable mode combines.
Although those skilled in the art should be understood that embodiment disclosed by the utility model embodiment as above,
Described content is only the embodiment for readily appreciating the utility model embodiment and using, and is not limited to the utility model
Embodiment.Technical staff in any the utility model embodiment art, is taken off not departing from the utility model embodiment
On the premise of the spirit and scope of dew, any modification and change, but this practicality can be carried out in the form and details of implementation
The scope of patent protection of new embodiment, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of nipple, include the body and box cupling of threaded connection；Characterized in that,
The box cupling is both ends symmetrical structure, and the box cupling is disposed with internal thread by end to centre, the first box cupling seals
Section, the second box cupling seal section and box cupling torque shoulder face；The body is disposed with body torque shoulder by end to centre
Face, the second body seal section, the first body seal section and external screw thread；
The external screw thread is connected with screw-internal thread fit, and the first box cupling seal section and the first body seal section are connected and formed
First sealing mechanism, the second box cupling seal section and the second body seal section, which are connected, forms the second sealing mechanism, described
Box cupling torque shoulder face is connected with body torque shoulder face.
2. nipple according to claim 1, it is characterised in that
The first box cupling seal section is ball face sealing section, and the first body seal section is cylinder seal section.
3. nipple according to claim 2, it is characterised in that
The second box cupling seal section is inner conical surface seal section, and the second body seal section is male cone (strobilus masculinus) seal section.
4. nipple according to claim 3, it is characterised in that
The ball face sealing section, inner conical surface seal section and the cylinder seal section, male cone (strobilus masculinus) seal section form radial interference fit
Attachment structure.
5. according to the nipple described in claim 1 or 2 or 3 or 4, it is characterised in that
First Transition face, second body are additionally provided between the second box cupling seal section and the box cupling torque shoulder face
The second transition face is correspondingly arranged between seal section and the body torque shoulder face.
6. nipple according to claim 5, it is characterised in that
The First Transition face is Inner arc transition face, and second transition face is external arc transition face.
7. nipple according to claim 4, it is characterised in that
The body torque shoulder face, the angle of inclination in box cupling torque shoulder face are -19 °~-17 °.
8. nipple according to claim 4, it is characterised in that
Conical surface seal is formed between the inner conical surface seal section and the male cone (strobilus masculinus) seal section, the cone angle of the conical surface seal is
20 °~25 °, the radius of the ball face sealing section is 4mm~9mm, and the internal diameter of the body is interior with the interlude of the box cupling
Footpath is identical.
9. nipple according to claim 4, it is characterised in that
The external screw thread is disposed as buttress thread with internal thread, and the angle of inclination of the spigot surface of the buttress thread is 9 °
~11 °, the angle of inclination of the loading end of the buttress thread is -6 °~-4 °, and the tooth of the internal thread is tall and big in externally threaded
Tooth is high.
10. nipple according to claim 6, it is characterised in that
The radius of the Inner arc transition face is 0.4mm~0.8mm, the radius of the external arc transition face for 0.2mm~
0.4mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644567.1U CN207004443U (en) | 2017-06-05 | 2017-06-05 | A kind of nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720644567.1U CN207004443U (en) | 2017-06-05 | 2017-06-05 | A kind of nipple |
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| Publication Number | Publication Date |
|---|---|
| CN207004443U true CN207004443U (en) | 2018-02-13 |
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ID=61446072
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| CN201720644567.1U Active CN207004443U (en) | 2017-06-05 | 2017-06-05 | A kind of nipple |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152246A (en) * | 2017-06-05 | 2017-09-12 | 中国海洋石油总公司 | A kind of threaded connector of hermetic seal oil pipe |
| CN108716369A (en) * | 2018-06-28 | 2018-10-30 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of casing thread connection of multi-sealed hook-type screw thread |
| CN112824642A (en) * | 2019-11-20 | 2021-05-21 | 宝山钢铁股份有限公司 | Buttress thread joint with high anti-thread gluing performance |
-
2017
- 2017-06-05 CN CN201720644567.1U patent/CN207004443U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152246A (en) * | 2017-06-05 | 2017-09-12 | 中国海洋石油总公司 | A kind of threaded connector of hermetic seal oil pipe |
| CN108716369A (en) * | 2018-06-28 | 2018-10-30 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of casing thread connection of multi-sealed hook-type screw thread |
| CN112824642A (en) * | 2019-11-20 | 2021-05-21 | 宝山钢铁股份有限公司 | Buttress thread joint with high anti-thread gluing performance |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |