CN208777916U - A kind of casing thread connection with multi-sealed face screw thread positive-angle - Google Patents
A kind of casing thread connection with multi-sealed face screw thread positive-angle Download PDFInfo
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- CN208777916U CN208777916U CN201821014044.XU CN201821014044U CN208777916U CN 208777916 U CN208777916 U CN 208777916U CN 201821014044 U CN201821014044 U CN 201821014044U CN 208777916 U CN208777916 U CN 208777916U
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- thread
- face
- pin
- conical surface
- female
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Abstract
The utility model provides a kind of casing thread connection with multi-sealed face screw thread positive-angle, including female thread and pin thread, internal screw thread has been set gradually from left to right on the female thread, female thread spherical seal surface, female thread conical surface seal face, female thread torque shoulder face, external screw thread has been set gradually from left to right on the pin thread, pin thread cylindrical sealing surface, pin thread conical surface seal face, pin thread torque shoulder face, the female thread and the pin thread are meshed together by the internal screw thread and the external screw thread, the female thread spherical seal surface and the pin thread cylindrical sealing surface are in close contact, female thread conical surface seal face and pin thread conical surface seal face are in close contact, female thread torque shoulder face and pin thread torque shoulder face are in close contact, the pin thread sealed end inner surface is provided with cylindrical surface and circular conical surface.By the utility model, to solve the problems, such as casing joint of the existing technology in cycle of higher pressure load and manage seal failure under inside and outside high pressure load acts on.
Description
Technical field
The utility model relates to a kind of casing thread connections, and in particular to a kind of with multi-sealed face screw thread positive-angle
Casing thread connection.
Background technique
In recent years, as the geological condition of the exhausted and new oil/gas well region of old oil/gas well is more complicated, with
Oil gas well mining depth is also deeper and deeper, and the depth of casing cementing is also just increasing, and the pressure that casing is born is also increasing.
In this way to the safety of casing and leakproofness, especially leakproofness, service performance requires also higher and higher.
At present during oil gas well mining, as well is deeper and deeper, well cementing casing pipe is followed in receiving pulling force and compression high pressure
The effect of ring load is lower to occur casing thread connection failure, causes very big economy to damage to unit in charge of construction and Party A company in this way
It loses.
Utility model content
The utility model provides a kind of casing thread connection with multi-sealed face screw thread positive-angle, to solve existing skill
Casing joint existing for art is under cycle of higher pressure load and the inside and outside high pressure load effect of pipe the problem of seal failure.
In order to solve the above technical problems, the utility model provides a kind of casing spiral shell with multi-sealed face screw thread positive-angle
Line connector, including female thread and pin thread have been set gradually from left to right internal screw thread, female thread spherical seal surface, female thread on the female thread
Conical surface seal face, female thread torque shoulder face, have been set gradually from left to right external screw thread on the pin thread, pin thread cylindrical sealing surface,
Pin thread conical surface seal face, pin thread torque shoulder face, the female thread and the pin thread are nibbled by the internal screw thread and the external screw thread
Be combined, the female thread spherical seal surface and the pin thread cylindrical sealing surface are in close contact, female thread conical surface seal face and
Pin thread conical surface seal face is in close contact, and female thread torque shoulder face and pin thread torque shoulder face are in close contact, institute
It states pin thread sealed end inner surface and is provided with cylindrical surface and circular conical surface, the cylindrical surface is close to pin thread torque shoulder face.
The loading end angle beta of the internal screw thread2It is 0 °~3 °, guide surface angle beta1It is 5 °~15 °, it is described externally threaded to hold
Section angle beta3It is 0 °~3 °, guide surface angle beta4It is 5 °~15 °.
The female thread spherical seal surface and pin thread cylindrical sealing surface interference fit, female thread conical surface seal face and pin thread cone
Face sealing surface is also interference fit, and magnitude of interference is between 0.20~0.60mm.
Arc smooth transition, pin thread cylindrical sealing surface are used between the female thread spherical seal surface and female thread conical surface seal face
Also arc transition cooperates with pin thread conical surface seal face.
The radius of the circular arc is 0.3mm~1.0mm.
The spherical radius of the female thread spherical seal surface is 2.0mm~6.0mm.
The angle in female thread conical surface seal face is between 0 °~10 °, and the axial length in female thread conical surface seal face
Between 10mm~20mm, the angle in pin thread conical surface seal face is between 0 °~10 °, and pin thread conical surface seal face
Axial length between 10mm~20mm.
Female thread torque shoulder face end is provided with -10 °~-20 ° of reversed chamfering α1, pin thread torque shoulder face
End is provided with -10 °~-20 ° of reversed chamfering α2。
The length on the cylindrical surface is 10mm~20mm, and the taper of the circular conical surface is 0 °~10 °.
Female thread torque shoulder face and female thread conical surface seal face use female thread arc smooth transition, the pin thread torque platform
Shoulder face and pin thread conical surface seal face use pin thread arc smooth transition.
The utility model bring the utility model has the advantages that casing thread connection provided by the utility model by being arranged on female thread
External screw thread, pin thread column is arranged in internal screw thread, female thread spherical seal surface, female thread conical surface seal face, female thread torque shoulder face on pin thread
Shape sealing surface, pin thread conical surface seal face, pin thread torque shoulder face, internal screw thread and external screw thread mesh together, and the conical surface of pin thread is close
Cover and female thread conical surface seal face form interference fit and form sealing surface, and female thread spherical seal surface is formed with pin thread cylindrical sealing surface
Interference fit forms sealing surface, and the contact of box and pin circular bead surface forms sealing surface, casing thread connection is made to obtain multiple protective, mentions
The high sealing performance of casing, it is ensured that the utility model product has relatively reliable sealing performance.
Detailed description of the invention
Fig. 1 is the whole knot of the casing thread connection with multi-sealed face screw thread positive-angle of the utility model embodiment
Structure schematic diagram.
Fig. 2 is the partial structurtes enlarged diagram of I in Fig. 1.
Fig. 3 is the partial structurtes enlarged diagram of T in Fig. 2.
Fig. 4 is the partial structurtes enlarged diagram of female thread in Fig. 2.
Fig. 5 is the partial structurtes enlarged diagram of M in Fig. 4.
Fig. 6 is the partial structurtes enlarged diagram of pin thread in Fig. 2.
Fig. 7 is the partial structurtes enlarged diagram of N in Fig. 6.
Wherein, A- female thread, B- pin thread, 1- internal screw thread, 2- external screw thread, 3- female thread spherical seal surface, 4- pin thread cylindrical seal
Face, 5- circular arc, 6- female thread conical surface seal face, 7- pin thread conical surface seal face, 8- female thread circular arc, 9- pin thread circular arc, 10- female thread torque
Circular bead surface, 11- pin thread torque shoulder face, the cylindrical surface 12-, 13- circular conical surface.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with drawings and the specific embodiments,
The utility model is described in further detail.
As shown in Fig. 1-Fig. 7, a kind of casing threads with multi-sealed face screw thread positive-angle provided by the utility model
Internal screw thread 1, female thread spherical seal surface 3, mother have been set gradually from left to right on connector, including female thread A and pin thread B, the female thread A
Conical surface seal face 6, female thread torque shoulder face 10 are detained, has been set gradually from left to right external screw thread 2, pin thread cylindricality on the pin thread B
Sealing surface 4, pin thread conical surface seal face 7, pin thread torque shoulder face 11, the female thread A and the pin thread B pass through the internal screw thread 1
Mesh together with the external screw thread 2, the female thread spherical seal surface 3 and the pin thread cylindrical sealing surface 4 are in close contact, described
Female thread conical surface seal face 6 and pin thread conical surface seal face 7 are in close contact, and female thread torque shoulder face 10 and the pin thread are turned round
Square circular bead surface 11 is in close contact, and the pin thread B sealed end inner surface is provided with cylindrical surface 12 and circular conical surface 13, the cylindrical surface 12
Close to pin thread torque shoulder face 11.The length on the cylindrical surface 12 is 10mm~20mm, and the taper of the circular conical surface 13 is
0 °~10 °.Pin thread B sealed end inner surface is arranged to cylindrical surface and circular conical surface can be with, it is possible to reduce the resistance of tube fluid.
In the present embodiment, the loading end angle beta of the internal screw thread 12It is 0 °~3 °, guide surface angle beta1It is 5 °~15 °,
The loading end angle beta of the external screw thread 23It is 0 °~3 °, guide surface angle beta4It is 5 °~15 °.
The female thread spherical seal surface 3 and pin thread cylindrical sealing surface 4 are interference fitted, female thread conical surface seal face 6 and public affairs
Detaining conical surface seal face 7 is also interference fit, and magnitude of interference is between 0.20~0.60mm.
5 rounding off of circular arc is used between the female thread spherical seal surface 3 and female thread conical surface seal face 6, pin thread cylindricality is close
Also arc transition cooperates for cover 4 and pin thread conical surface seal face 7.
The radius of the circular arc 5 is 0.3mm~1.0mm.
The spherical radius of the female thread spherical seal surface 3 is 2.0mm~6.0mm.
The angle in female thread conical surface seal face 6 is between 0 °~10 °, and the axial direction in female thread conical surface seal face 6 is long
Degree is between 10mm~20mm, and the angle in pin thread conical surface seal face 7 is between 0 °~10 °, and the pin thread conical surface seal
The axial length in face 7 is between 10mm~20mm.
10 end of female thread torque shoulder face is provided with -10 °~-20 ° of reversed chamfering α1, the pin thread torque shoulder
11 end of face is provided with -10 °~-20 ° of reversed chamfering α2。
Female thread torque shoulder face 10 and female thread conical surface seal face 6 use 8 rounding off of female thread circular arc, and the pin thread is turned round
Square circular bead surface 11 and pin thread conical surface seal face 7 use 9 rounding off of pin thread circular arc.
The utility model relates to a kind of petroleum gas seamless casing special buckle industry pipe screw joints comprising processing
The pin thread for thering is external screw thread to connect and the female thread for being machined with internal screw thread and connecting comprising there is the pin thread and female thread of contact surface, connect
Touching surface includes threaded portions contact and unthreaded sections contact.Threaded portions contact includes internal screw thread tooth top and external screw thread bottom of the tooth
The carrying face contact of contact and internal and external screw thread tooth.Unthreaded sections contact includes internal screw thread sealing spherical surface and external screw thread cylinder
The step face contact of face contact, the conical surface and taper-face contact and internal and external threads.The wall surface of male and female step surface and axis hole is
Arc smooth transition.Internal screw thread spherical sealed and conical surface seal are all made of interference fit.In the utility model, by internal screw thread
Spherical surface and external screw thread cylinder use interference fit system, even if generating excessive yield deformation in cone seal and causing close
In the case where envelope failure, spherical surface remains to keep sealing performance with the conical surface, and such design can effectively improve nipple severe
Excellent sealing performance is still kept under outer load.
Furthermore, it is understood that the nipple is to connect male and female button according to the torque value of setting when with hydraulic tongs
Come, until the step surface of the step face contact female thread of pin thread.The sealing cone of pin thread and the female thread sealing surface conical surface were formed at this time
It is full of cooperation, female thread seals spherical surface and the column sealed face of pin thread forms and is interference fitted.Two sealing surfaces are mutually independent of each other, to reach
Expected gas sealing ability requirement.
According to the technical solution of the utility model, the pipe screw joint be when box and pin it is anticipated that torque connection
When together, the torque shoulder face of female thread and the torque shoulder face of pin thread are in close contact together, control male and female upper button bit
It sets.Male and female conical seal (contact) face keeps interference fit in the elastic range of material simultaneously, plays sealing function.It is male and female
Spherical sealed and cylindrical seal enter interference seal, to form secondary interference seal.
This pipe screw joint is inserted in female thread by make-up device in practical operation, by pin thread, and casing first uses the slow-speed of revolution
2 circle left and right are screwed in, then use 15 revolving speeds for enclosing left and right per minute to screw in until finally using every lower than 5 circles when last 1~2 encloses
The revolving speed of minute is further threaded into predetermined position.
The working principle of this pipe screw joint is that tight interference fit, the shoulder conical surface are formed after box and pin taper-face contact
It positions rapidly, guarantee twist-on positioning accuracy, during twist-on, spherical surface and cylinder also generate interference fit, and shoulder not only positions
Accurately, it while can reduce axial force, in pin thread, female thread engagement process, considerably increase anti-compression properties, the sealing of connector
Property, while also guaranteeing that conical seal (contact) face fits closely together.
In conclusion casing thread connection provided by the utility model is spherical by the way that internal screw thread, female thread are arranged on female thread
External screw thread, pin thread cylindrical sealing surface, pin thread cone is arranged in sealing surface, female thread conical surface seal face, female thread torque shoulder face on pin thread
Face sealing surface, pin thread torque shoulder face, internal screw thread and external screw thread, mesh together, the conical surface seal face of pin thread and the female thread conical surface
Sealing surface forms interference fit and forms sealing surface, and female thread spherical seal surface forms close with pin thread cylindrical sealing surface formation interference fit
The contact of cover, box and pin circular bead surface forms sealing surface, and casing thread connection is made to obtain multiple protective, improves the sealing of casing
Performance, it is ensured that the utility model product has relatively reliable sealing performance.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of the claims of the utility model.
Claims (10)
1. a kind of casing thread connection with multi-sealed face screw thread positive-angle, including female thread (A) and pin thread (B), feature
It is, internal screw thread (1), female thread spherical seal surface (3), female thread conical surface seal has been set gradually from left to right on the female thread (A)
Face (6), female thread torque shoulder face (10) have been set gradually from left to right external screw thread (2) on the pin thread (B), and pin thread cylindricality is close
Cover (4), pin thread conical surface seal face (7), pin thread torque shoulder face (11), the female thread (A) and the pin thread (B) pass through described
Internal screw thread (1) and the external screw thread (2) mesh together, the female thread spherical seal surface (3) and the pin thread cylindrical sealing surface
(4) it is in close contact, female thread conical surface seal face (6) and pin thread conical surface seal face (7) are in close contact, the female thread torque
Circular bead surface (10) and pin thread torque shoulder face (11) are in close contact, and pin thread (B) the sealed end inner surface is provided with cylinder
Face (12) and circular conical surface (13), the cylindrical surface (12) is close to pin thread torque shoulder face (11).
2. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
The loading end angle beta of internal screw thread (1)2It is 0 °~3 °, guide surface angle beta1It is 5 °~15 °, the carrying face angle of the external screw thread (2)
Spend β3It is 0 °~3 °, guide surface angle beta4It is 5 °~15 °.
3. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
Female thread spherical seal surface (3) and pin thread cylindrical sealing surface (4) interference fit, female thread conical surface seal face (6) and the pin thread conical surface
Sealing surface (7) is also interference fit, and magnitude of interference is between 0.20~0.60mm.
4. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
Circular arc (5) rounding off is used between female thread spherical seal surface (3) and female thread conical surface seal face (6).
5. as claimed in claim 4 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
The radius of circular arc (5) is 0.3mm~1.0mm.
6. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
The spherical radius of female thread spherical seal surface (3) is 2.0mm~6.0mm.
7. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
The angle in female thread conical surface seal face (6) is between 0 °~10 °, and the axial length in female thread conical surface seal face (6) is in 10mm
Between~20mm, the angle in pin thread conical surface seal face (7) is between 0 °~10 °, and pin thread conical surface seal face (7)
Axial length is between 10mm~20mm.
8. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
Female thread torque shoulder face (10) end is provided with -10 °~-20 ° of reversed chamfering α1, pin thread torque shoulder face (11) end
It is provided with -10 °~-20 ° of reversed chamfering α2。
9. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that described
The length on cylindrical surface (12) is 10mm~20mm, and the taper of the circular conical surface (13) is 0 °~10 °.
10. as described in claim 1 with the casing thread connection of multi-sealed face screw thread positive-angle, which is characterized in that institute
Female thread torque shoulder face (10) and female thread conical surface seal face (6) are stated using female thread circular arc (8) rounding off, the pin thread torque platform
Shoulder face (11) and pin thread conical surface seal face (7) use pin thread circular arc (9) rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014044.XU CN208777916U (en) | 2018-06-28 | 2018-06-28 | A kind of casing thread connection with multi-sealed face screw thread positive-angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014044.XU CN208777916U (en) | 2018-06-28 | 2018-06-28 | A kind of casing thread connection with multi-sealed face screw thread positive-angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208777916U true CN208777916U (en) | 2019-04-23 |
Family
ID=66152981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821014044.XU Expired - Fee Related CN208777916U (en) | 2018-06-28 | 2018-06-28 | A kind of casing thread connection with multi-sealed face screw thread positive-angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208777916U (en) |
-
2018
- 2018-06-28 CN CN201821014044.XU patent/CN208777916U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190423 Termination date: 20200628 |