CN107152246A - A kind of threaded connector of hermetic seal oil pipe - Google Patents
A kind of threaded connector of hermetic seal oil pipe Download PDFInfo
- Publication number
- CN107152246A CN107152246A CN201710416029.1A CN201710416029A CN107152246A CN 107152246 A CN107152246 A CN 107152246A CN 201710416029 A CN201710416029 A CN 201710416029A CN 107152246 A CN107152246 A CN 107152246A
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- China
- Prior art keywords
- seal section
- box cupling
- face
- seal
- torque shoulder
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
A kind of threaded connector of hermetic seal oil pipe is disclosed herein, includes the body and box cupling of threaded connection；Box cupling is two 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, constitutes the first sealing mechanism, second box cupling seal section and the second body seal section, which are connected, constitutes 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 such as 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, and especially a kind of hermetic seal tubing round thread connects
Head.
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
The test of the combined stresses of generation such as casing string is long-term in Oil/gas Well together to be born to stretch, compresses, internal pressure.
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, horizontal well, extended reach well, the exploitation of hot injection-production well, the performance to tubing and casing propose higher want
Ask.API routine oil sleeve joints are undertaken because of sealing and intensity by screw thread pair, and it is complicated that it can not meet high sealing, high intensity
The requirement of hole condition.
In addition, conventional air-tight seal screw joint, use single-stage metallic sealing section as primary seal, this class formation is not more
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 occur failure accidents.
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.
The content of the invention
The technical problem that the application is solved is to provide a kind of threaded connector of hermetic seal oil pipe, can effectively overcome prior art
Present in defect, can effectively solve the problem that in ultra-deep Oil/gas Well that nipple thread gluing, seal failure, torque shoulder easily occurs and cut
Cut the defects such as failure, joint dropout；Further, additionally it is possible to improve nipple interior external pressure, bending load, compressive load with
And there is more reliable bonding strength and sealing property under the complex working condition such as tensile load.
In order to solve the above technical problems, this application provides a kind of threaded connector of hermetic seal oil pipe, including threaded connection
Body and box cupling；
The box cupling is two 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 constituted, the second box cupling seal section and the second body seal section, which are connected, constitutes the second sealing mechanism,
The box cupling torque shoulder face is connected with body torque shoulder face；
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, institute
State 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
Constitute axially interference fit attachment structure.
Above-mentioned threaded connector of hermetic seal oil pipe, 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 threaded connector of hermetic seal oil pipe, 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 constitute radial interference
Mating connection structure.
Above-mentioned threaded connector of hermetic seal oil pipe, can also have following features,
First Transition face, described second 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 body seal section and the body torque shoulder face.
Above-mentioned threaded connector of hermetic seal oil pipe, 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 threaded connector of hermetic seal oil pipe, 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 threaded connector of hermetic seal oil pipe, can also have following features,
Conical surface seal, the cone angle of the conical surface seal are constituted between the inner conical surface seal section and the male cone (strobilus masculinus) seal section
For 20 °~25 °.
Above-mentioned threaded connector of hermetic seal oil pipe, can also have following features,
The radius of the ball face sealing section is 4mm~9mm, the internal diameter of the internal diameter of the body and the interlude of the box cupling
It is identical.
Above-mentioned threaded connector of hermetic seal oil pipe, 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 threaded connector of hermetic seal oil pipe, 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, above-mentioned air-tight seal screw joint of the invention can meet hyperbar and containing the severe of Korrosionsmedium
Operating mode is carved, in axial tension, compression, is reversed, the effect of the load combinations such as interior external pressure is lower to have stronger bonding strength, sealing property
With antifatigue failure ability, while have anti-galling, anti-dropout, it is anti-cross moment of torsion premium properties.
Further, the present invention can be formed inside nipple by above-mentioned first sealing mechanism, the second sealing mechanism
Two-stage is sealed, 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.
Further, the present invention can specifically can by above-mentioned ball face sealing section and cylinder seal section between tight fit,
The first sealing mechanism that can be formed inside nipple；Can be by between above-mentioned inner conical surface seal section and male cone (strobilus masculinus) seal section
It is fitted close, 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 ensure that good seal performance of the nipple under Action of Combined Loads.
Further, the present invention can pass through above-mentioned axial interference fit attachment structure and radial interference fit attachment structure
Set, the connective stability and bonding strength of nipple can be effectively improved, above-mentioned airtight sealed tube is can effectively ensure that
Structural stability of the nipple under bad working environments.
Further, the present invention can be by the setting of above-mentioned First Transition face and the second transition face, using the teaching of the invention it is possible to provide to screw thread
The deformation sustained release space of joint, i.e., above-mentioned deformation Free up Memory is enclosed and constituted by Inner arc transition face and external arc transition face
One closed cavity.Above-mentioned deformation is sustained the setting in space, enables to conical surface seal section and torque shoulder face in larger interference
In the case of amount, deformation release is obtained, alleviates stress concentration phenomenon, can effectively prevent sealing structure from producing surrender failure.
Further, the torque shoulder face of above-mentioned optimization angle that the present invention is provided, with it is stronger it is anti-cross torsion ability, together
When it is insensitive to axial load, can remain to keep higher sealing property in the case where axial load is larger；It is above-mentioned inside and outside
After threaded engagement, the internal diameter and box cupling internal diameter of body are flushed, and can effectively reduce tubular body turbulent flow phenomenon, it is to avoid in internal diameter change
Place produces pressure oscillation and impacts stress to body, improves the stress corrosion resistant ability of nipple.
Further, the above-mentioned screw thread that the present invention is provided is a kind of barb type spiral shell designed based on buttress thread
Line, it can effectively improve the anti-slip ability of nipple, and internal and external threads rotation is with after, and external screw thread tooth top and internal thread bottom of the tooth are simultaneously
Not in contact with, the stress of screw thread can be reduced, prevent screw thread produce thread gluing phenomenon, can effectively ensure that the Stability Analysis of Structures of nipple
Property.
Other features and advantage will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the embodiment of the present invention.The purpose of the application and other advantages can be by explanations
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical scheme, and constitutes a part for specification, with this
The embodiment of application is used for the technical scheme for explaining the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the box cupling partial schematic diagram in the embodiment of the present invention one；
Fig. 3 is the body partial schematic diagram in the embodiment of the present invention one；
Fig. 4 is the buttress thread partial schematic diagram in the embodiment of the present invention one；
Fig. 5 is the torque shoulder face partial schematic diagram in the embodiment of the present invention one；
Illustrate：
1- bodys, 2- box cuplings, 3- internal threads, 4- ball face sealings section, 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 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 embodiment of the present invention one provides a kind of threaded connector of hermetic seal oil pipe, including threaded connection
Body 1 and box cupling 2；With reference to shown in Fig. 2, box cupling 2 is two ends symmetrical structure, and box cupling 2 is disposed with interior spiral shell by end to centre
Line 3, the first 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 extremely
Centre is disposed 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 are sealed
Section, which is connected, constitutes the first sealing mechanism, and the second box cupling seal section and the mating connection of the second body seal section constitute second and sealed
Mechanism, box cupling torque shoulder face 7 is connected with body torque shoulder face 12.
Compared with prior art, inside can be by above-mentioned first sealing mechanism, the second sealing mechanism formation nipple
Two-stage is sealed, 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 ensure that 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 constitute 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 constitute 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 threaded connector of hermetic seal oil pipe exists
Structural stability under bad working environments.
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 constitute 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 in the case of the larger magnitude of interference, is deformed
Release, alleviates 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 engagement, with the increase of torque wrench moment, male cone (strobilus masculinus) seal section 10 and inner conical surface seal section 5 are contacted, cylinder seal section 9 and ball
Face seal section 4 is contacted, and primary seal can produce certain magnitude of interference；Finally, box cupling torque shoulder face 7 and body torque shoulder face 12
Start 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 it 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 constituted 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 excessively, while unwise to axial load
Sense, can remain to keep higher sealing property in the case where axial load is larger；After above-mentioned internal and external threads 8 are screwed, body 1
Internal diameter and the internal diameter of box cupling 2 flush, can effectively reduce the internal turbulence phenomenon of body 1, it is to 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 tooth of external screw thread 8 height is preferably 1mm, and the tooth of internal thread 3 height 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 is 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 difficult 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 embodiment of the present invention two provides a kind of threaded connector of hermetic seal oil pipe, and agent structure is similar with embodiment one,
Body and box cupling including threaded connection；Specific setting on agent structure refers to the record in embodiment one, herein purport
Illustrating 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, moment of torsion platform also can be effectively met
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 preferably 9mm of ball face sealing section is stated, 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 external screw thread tooth height is preferably 1mm, and internal thread tooth height 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 present invention can meet hyperbar and containing corruption
The harsh operating mode of corrosion medium, in axial tension, compression, is reversed, and the effect of the load combinations such as interior external pressure is lower to have stronger connection
Intensity, sealing property and antifatigue failure ability, while having anti-galling, anti-dropout, the anti-premium properties for crossing moment of torsion.
Further, the present invention can be formed inside nipple by above-mentioned first sealing mechanism, the second sealing mechanism
Two-stage is sealed, 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.
Further, the present invention can specifically can by above-mentioned ball face sealing section and cylinder seal section between tight fit,
The first sealing mechanism that can be formed inside nipple；Can be by between above-mentioned inner conical surface seal section and male cone (strobilus masculinus) seal section
It is fitted close, 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 ensure that good seal performance of the nipple under Action of Combined Loads.
Further, the present invention can pass through above-mentioned axial interference fit attachment structure and radial interference fit attachment structure
Set, the connective stability and bonding strength of nipple can be effectively improved, above-mentioned airtight sealed tube is can effectively ensure that
Structural stability of the nipple under bad working environments.
Further, the present invention can be by the setting of above-mentioned First Transition face and the second transition face, using the teaching of the invention it is possible to provide to screw thread
The deformation sustained release space of joint, i.e., above-mentioned deformation Free up Memory is enclosed and constituted by Inner arc transition face and external arc transition face
One closed cavity.Above-mentioned deformation is sustained the setting in space, enables to conical surface seal section and torque shoulder face in larger interference
In the case of amount, deformation release is obtained, alleviates stress concentration phenomenon, can effectively prevent sealing structure from producing surrender failure.
Further, the torque shoulder face of above-mentioned optimization angle that the present invention is provided, with it is stronger it is anti-cross torsion ability, together
When it is insensitive to axial load, can remain to keep higher sealing property in the case where axial load is larger；It is above-mentioned inside and outside
After threaded engagement, the internal diameter and box cupling internal diameter of body are flushed, and can effectively reduce tubular body turbulent flow phenomenon, it is to avoid in internal diameter change
Place produces pressure oscillation and impacts stress to body, improves the stress corrosion resistant ability of nipple.
Further, the above-mentioned screw thread that the present invention is provided is a kind of barb type spiral shell designed based on buttress thread
Line, it can effectively improve the anti-slip ability of nipple, and internal and external threads rotation is with after, and external screw thread tooth top and internal thread bottom of the tooth are simultaneously
Not in contact with, the stress of screw thread can be reduced, prevent screw thread produce thread gluing phenomenon, can effectively ensure that the Stability Analysis of Structures of nipple
Property.
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 to 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 that specific features, structure, material or feature with reference to the embodiment or example description are contained at least one reality of 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 is combined.
Those skilled in the art should be understood that, although the embodiment disclosed by the embodiment of the present invention is as above, but described
Content be only the embodiment for readily appreciating the embodiment of the present invention and using, be not limited to the embodiment of the present invention.It is any
Technical staff in art of the embodiment of the present invention, in the premise for not departing from the spirit and scope disclosed by the embodiment of the present invention
Under, any modification and change, but the scope of patent protection of the embodiment of the present invention can be carried out in the form and details of implementation,
Still it should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of threaded connector of hermetic seal oil pipe, includes the body and box cupling of threaded connection；Characterized in that,
The box cupling is two ends symmetrical structure, and the box cupling is disposed with internal thread, the first box cupling by end to centre and sealed
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 constituted
First sealing mechanism, the second box cupling seal section and the second body seal section, which are connected, constitutes the second sealing mechanism, described
Box cupling torque shoulder face is connected with body torque shoulder face；
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, described interior
Screw 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 are constituted
Axially it is interference fitted attachment structure.
2. threaded connector of hermetic seal oil pipe 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. threaded connector of hermetic seal oil pipe according to claim 2, 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 constitute radial interference fit
Attachment structure.
4. the threaded connector of hermetic seal oil pipe according to claim 1 or 2 or 3, 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.
5. threaded connector of hermetic seal oil pipe according to claim 4, it is characterised in that
The First Transition face is Inner arc transition face, and second transition face is external arc transition face.
6. threaded connector of hermetic seal oil pipe according to claim 3, it is characterised in that
The body torque shoulder face, the angle of inclination in box cupling torque shoulder face are -19 °~-17 °.
7. threaded connector of hermetic seal oil pipe according to claim 3, it is characterised in that
Conical surface seal is constituted 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 °.
8. threaded connector of hermetic seal oil pipe according to claim 3, it is characterised in that
The radius of the ball face sealing section is 4mm~9mm, the internal diameter phase of the internal diameter of the body and the interlude of the box cupling
Together.
9. threaded connector of hermetic seal oil pipe according to claim 3, 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. threaded connector of hermetic seal oil pipe according to claim 5, 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 |
|---|---|---|---|
| CN201710416029.1A CN107152246A (en) | 2017-06-05 | 2017-06-05 | A kind of threaded connector of hermetic seal oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416029.1A CN107152246A (en) | 2017-06-05 | 2017-06-05 | A kind of threaded connector of hermetic seal oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107152246A true CN107152246A (en) | 2017-09-12 |
Family
ID=59795953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710416029.1A Pending CN107152246A (en) | 2017-06-05 | 2017-06-05 | A kind of threaded connector of hermetic seal oil pipe |
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| Country | Link |
|---|---|
| CN (1) | CN107152246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843254A (en) * | 2018-06-28 | 2018-11-20 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle |
| CN109441368A (en) * | 2018-12-10 | 2019-03-08 | 衡阳华菱钢管有限公司 | Titanium alloy oil connection |
| 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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| US6312024B1 (en) * | 1998-03-26 | 2001-11-06 | Vallourec Mannesmann Oil & Gas France | Threaded assembly of metal tubes designed to contain a corrosive fluid |
| CN2557683Y (en) * | 2002-05-31 | 2003-06-25 | 宝山钢铁股份有限公司 | Direct joint type steel pipe screen joint |
| CN201318513Y (en) * | 2008-11-22 | 2009-09-30 | 衡阳华菱连轧管有限公司 | Oil pipe high-pressure gas seal connection structure |
| CN201377293Y (en) * | 2008-08-07 | 2010-01-06 | 无锡法斯特能源开发科技有限公司 | Screwed nipple for air-seal oil pipe |
| CN201443658U (en) * | 2009-07-07 | 2010-04-28 | 胜利油田高原石油装备有限责任公司 | Threaded connector of hermetic seal oil pipe |
| CN202900063U (en) * | 2012-10-23 | 2013-04-24 | 中国石油天然气股份有限公司 | Air-tight seal oil tube threaded connector |
| CN203239244U (en) * | 2013-04-19 | 2013-10-16 | 中国海洋石油总公司 | Air-tight seal oil pipe screwed joint |
| CN207004443U (en) * | 2017-06-05 | 2018-02-13 | 中国海洋石油总公司 | A kind of nipple |
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2017
- 2017-06-05 CN CN201710416029.1A patent/CN107152246A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6312024B1 (en) * | 1998-03-26 | 2001-11-06 | Vallourec Mannesmann Oil & Gas France | Threaded assembly of metal tubes designed to contain a corrosive fluid |
| CN2557683Y (en) * | 2002-05-31 | 2003-06-25 | 宝山钢铁股份有限公司 | Direct joint type steel pipe screen joint |
| CN201377293Y (en) * | 2008-08-07 | 2010-01-06 | 无锡法斯特能源开发科技有限公司 | Screwed nipple for air-seal oil pipe |
| CN201318513Y (en) * | 2008-11-22 | 2009-09-30 | 衡阳华菱连轧管有限公司 | Oil pipe high-pressure gas seal connection structure |
| CN201443658U (en) * | 2009-07-07 | 2010-04-28 | 胜利油田高原石油装备有限责任公司 | Threaded connector of hermetic seal oil pipe |
| CN202900063U (en) * | 2012-10-23 | 2013-04-24 | 中国石油天然气股份有限公司 | Air-tight seal oil tube threaded connector |
| CN203239244U (en) * | 2013-04-19 | 2013-10-16 | 中国海洋石油总公司 | Air-tight seal oil pipe screwed joint |
| CN207004443U (en) * | 2017-06-05 | 2018-02-13 | 中国海洋石油总公司 | A kind of nipple |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843254A (en) * | 2018-06-28 | 2018-11-20 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle |
| CN109441368A (en) * | 2018-12-10 | 2019-03-08 | 衡阳华菱钢管有限公司 | Titanium alloy oil connection |
| 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 Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China Oilfield Services Limited Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: China Oilfield Services Limited |
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Application publication date: 20170912 |