CN108843254A - A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle - Google Patents
A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle Download PDFInfo
- Publication number
- CN108843254A CN108843254A CN201810705970.XA CN201810705970A CN108843254A CN 108843254 A CN108843254 A CN 108843254A CN 201810705970 A CN201810705970 A CN 201810705970A CN 108843254 A CN108843254 A CN 108843254A
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- Prior art keywords
- thread
- face
- female thread
- conical surface
- pin
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- 238000007789 sealing Methods 0.000 claims abstract description 40
- 230000007704 transition Effects 0.000 claims description 10
- 230000004323 axial length Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The present invention provides a kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle, including female thread and pin thread, internal screw thread, female thread spherical seal surface, female thread conical surface seal face, female thread torque shoulder face have been set gradually from left to right on the female thread, external screw thread, pin thread cylindrical sealing surface, pin thread conical surface seal face, pin thread torque shoulder face have been set gradually from left to right on the pin thread.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, and female thread torque shoulder face and pin thread torque shoulder face are in close contact.The inner surface in the pin thread sealed end close to pin thread torque shoulder face is circular conical surface.Through the invention, to solve the problems, such as that traditional oil pipe threaded connector tubing of the existing technology is easy to happen failure under the effect of cycle of higher pressure load.
Description
Technical field
The present invention relates to a kind of oil pipe threaded connectors, and in particular to a kind of oil pipe with multi-sealed face screw thread positive-angle
Nipple.
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 pressure of well is also increasing.It is especially close in this way to the safety of pipe and leakproofness
Feng Xing, service performance require also higher and higher.
At present during oil gas well mining, most tubing is easy to happen pipe screw joint under the effect of cycle of higher pressure load
Failure, causes very huge economic loss to unit in charge of construction and Party A company in this way.
With the increase of drilling depth, the external pressure and internal pressure that pipe is born are also increasing, this just needs oil pipe to connect
Head can also bear very high external pressure and internal pressure load.
Summary of the invention
The present invention provides a kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle, is deposited with solving the prior art
Traditional oil pipe threaded connector tubing cycle of higher pressure load effect under be easy to happen failure the problem of.
It is connect in order to solve the above technical problems, the present invention provides a kind of tubing round thread with multi-sealed face screw thread positive-angle
Head, including female thread and pin thread have been set gradually from left to right internal screw thread, female thread spherical seal surface, the female thread conical surface on the female thread
Sealing surface, female thread torque shoulder face have been set gradually from left to right external screw thread, pin thread cylindrical sealing surface, pin thread on the pin thread
Conical surface seal face, pin thread torque shoulder face.The female thread and the pin thread are engaged on by the internal screw thread and the external screw thread
Together, the female thread spherical seal surface and the pin thread cylindrical sealing surface are in close contact, female thread conical surface seal face and described
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.The public affairs
The inner surface for detaining sealed end close to pin thread torque shoulder face is circular conical surface.Female thread torque shoulder face and female thread conical surface seal face
The female thread circular arc radian of transition position is less than the pin thread circular arc radian in pin thread torque shoulder face and pin thread conical surface seal face transition position.
The loading end angle beta of the internal screw thread2It is 0 °~10 °, guide surface angle beta1It is 5 °~15 °, it is described externally threaded to hold
Section angle beta3It is 0 °~10 °, 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 0.15~0.50mm.
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~10.0mm.
The angle in female thread conical surface seal face is between 25 °~35 °, 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 25 °~35 °, and pin thread conical surface seal face
Axial length between 10mm~20mm.
Female thread torque shoulder face end is provided with -15 °~-25 ° of reversed chamfering α1, pin thread torque shoulder face
End is provided with -15 °~-25 ° of reversed chamfering α2。
The taper of the circular conical surface is 0 °~10 °, and the sealing nose length is 5~8mm.
Bring beneficial effect of the present invention：Oil pipe threaded connector provided by the invention is spherical by the way that female thread is arranged on female thread
Pin thread cylindrical sealing surface, pin thread conical surface seal is arranged in sealing surface, female thread conical surface seal face, female thread torque shoulder face on pin thread
Face, pin thread torque shoulder face, male and female button is connected by the way that screw thread is ratcheting, until the shoulder of the shoulder face contact female thread of pin thread
Face, the sealing cone of pin thread and the female thread sealing surface conical surface, which are formed, at this time is interference fitted, and female thread seals spherical surface and pin thread is column sealed
Face forms interference fit, and multiple sealing surfaces are mutually independent of each other, and improves the sealing performance of oil pipe, it is ensured that product of the present invention has more
Add reliable sealing performance.
Detailed description of the invention
Fig. 1 is the oil pipe threaded connector with multi-sealed face screw thread positive-angle of the embodiment of the present invention.
Fig. 2 is the partial structurtes enlarged diagram of I in Fig. 1.
Fig. 3 is the partial structurtes enlarged diagram of female thread in Fig. 2.
Fig. 4 is the partial structurtes enlarged diagram of M in Fig. 3.
Fig. 5 is the partial structurtes enlarged diagram of pin thread in Fig. 2.
Fig. 6 is the partial structurtes enlarged diagram of N in Fig. 5.
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, 12- circular conical surface, 13- seal nose length.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail.
Fig. 1 is the oil pipe threaded connector with multi-sealed face screw thread positive-angle of the embodiment of the present invention.
Fig. 2 is the partial structurtes enlarged diagram of I in Fig. 1.
Fig. 3 is the partial structurtes enlarged diagram of female thread in Fig. 2.
Fig. 4 is the partial structurtes enlarged diagram of M in Fig. 3.
Fig. 5 is the partial structurtes enlarged diagram of pin thread in Fig. 2.
Fig. 6 is the partial structurtes enlarged diagram of N in Fig. 5.
As shown in figures 1 to 6, the oil pipe threaded connector provided by the invention with multi-sealed face screw thread positive-angle, including mother
Internal screw thread 1, female thread spherical seal surface 3, female thread conical surface seal have been set gradually from left to right on button A and pin thread B, 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, pin thread cylindrical sealing surface 4, public
Detain conical surface seal face 7, pin thread torque shoulder face 11.The female thread A and pin thread B passes through the internal screw thread 1 and the outer spiral shell
Line 2 meshes together, and the female thread spherical seal surface 3 and the pin thread cylindrical sealing surface 4 are in close contact, and the female thread conical surface is close
Cover 6 and pin thread conical surface seal face 7 are in close contact, female thread torque shoulder face 10 and pin thread torque shoulder face 11
It is in close contact.The inner surface in the pin thread B sealed end close to pin thread torque shoulder face 11 is circular conical surface 12.The female thread torque platform
It is close with the pin thread conical surface that 8 radian of female thread circular arc of shoulder face 10 and 6 transition position of female thread conical surface seal face is less than pin thread torque shoulder face 11
9 radian of pin thread circular arc of 7 transition position of cover.
Furthermore, it is understood that the loading end angle beta of the internal screw thread 12It is 0 °~10 °, guide surface angle beta1It is 5 °~15 °, institute
State the loading end angle beta of external screw thread 23It is 0 °~10 °, 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 0.15~0.50mm.
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~10.0mm.
The angle in female thread conical surface seal face 6 is between 25 °~35 °, 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 25 °~35 °, 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 -15 °~-25 ° of reversed chamfering α1, the pin thread torque shoulder
11 end of face is provided with -15 °~-25 ° of reversed chamfering α2。
The taper of the circular conical surface 12 is 0 °~10 °, and the sealing nose length 13 is 5~8mm.
In the present embodiment, the present invention relates to a kind of petroleum gas seamless casing special buckle industry pipe screw joint,
It includes the female thread for being machined with the pin thread of external screw thread connection and being machined with internal screw thread and connecting comprising has the pin thread of contact surface
And female thread, contact surface include threaded portions contact and unthreaded sections contact.Threaded portions contact include internal screw thread tooth top with
The carrying face contact of the contact of external screw thread bottom of the tooth and internal and external screw thread tooth.Unthreaded sections contact include internal screw thread sealing spherical surface and
The step face contact of external screw thread Cylindrical Surfaces Contact, the conical surface and taper-face contact and internal and external threads.Male and female step surface and axis hole
Wall surface be arc smooth transition.Internal screw thread spherical sealed and conical surface seal are all made of interference fit.In the present invention, by interior
Spherical surface on screw thread and external screw thread cylinder use the fit system of interference, even if generating excessive yield deformation in cone seal
In the case where leading to seal failure, spherical surface remains to keep sealing performance with the conical surface, and such design can effectively improve nipple
Excellent sealing performance is still kept under severe outer load.
The oil pipe threaded connector is to work as to be connected male and female button according to the torque value of setting with hydraulic tongs, 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, which are formed, at this time is interference fitted,
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.
Technical solution according to the invention, it is described oil pipe screw joint be when box and pin it is anticipated that torque be connected to
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 position on the buckle.
Male and female conical seal (contact) face keeps interference fit in the elastic range of material simultaneously, plays sealing function.Male and female ball
Shape sealing 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 oil pipe 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 the anti-compression properties of connector, seal
Property, while also guaranteeing that conical seal (contact) face fits closely together.
In conclusion oil pipe threaded connector provided by the invention on female thread by being arranged female thread spherical seal surface, female thread
Pin thread cylindrical sealing surface, pin thread conical surface seal face, pin thread torque is arranged in conical surface seal face, female thread torque shoulder face on pin thread
Circular bead surface, male and female button are connected by the way that screw thread is ratcheting, until the circular bead surface of the shoulder face contact female thread of pin thread, pin thread at this time
Sealing cone and the female thread sealing surface conical surface formed and be interference fitted, female thread sealing spherical surface and the formation interference of pin thread column sealed face are matched
It closes, multiple sealing surfaces are mutually independent of each other, and improve the sealing performance of oil pipe, it is ensured that product of the present invention has relatively reliable sealing
Performance.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (9)
1. a kind of oil pipe threaded connector 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) sealed end is close to pin thread torque shoulder
The inner surface in face (11) is circular conical surface (12), female thread torque shoulder face (10) and female thread conical surface seal face (6) transition position
Female thread circular arc (8) radian is less than pin thread circular arc (9) arc in pin thread torque shoulder face (11) and pin thread conical surface seal face (7) transition position
Degree.
2. as described in claim 1 with the oil pipe threaded connector 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 °~10 °, guide surface angle beta1It is 5 °~15 °, the carrying face angle of the external screw thread (2)
Spend β3It is 0 °~10 °, guide surface angle beta4It is 5 °~15 °.
3. as described in claim 1 with the oil pipe threaded connector 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 0.15~0.50mm.
4. as described in claim 1 with the oil pipe threaded connector 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 oil pipe threaded connector 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 oil pipe threaded connector 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~10.0mm.
7. as described in claim 1 with the oil pipe threaded connector 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 25 °~35 °, 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 25 °~35 °, and pin thread conical surface seal face (7)
Axial length between 10mm~20mm.
8. as described in claim 1 with the oil pipe threaded connector of multi-sealed face screw thread positive-angle, which is characterized in that described
Female thread torque shoulder face (10) end is provided with -15 °~-25 ° of reversed chamfering α1, pin thread torque shoulder face (11) end
It is provided with -15 °~-25 ° of reversed chamfering α2。
9. as described in claim 1 with the oil pipe threaded connector of multi-sealed face screw thread positive-angle, which is characterized in that described
The taper of circular conical surface (12) is 0 °~10 °, and the sealing nose length (13) is 5~8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705970.XA CN108843254A (en) | 2018-06-28 | 2018-06-28 | A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705970.XA CN108843254A (en) | 2018-06-28 | 2018-06-28 | A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108843254A true CN108843254A (en) | 2018-11-20 |
Family
ID=64201237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810705970.XA Pending CN108843254A (en) | 2018-06-28 | 2018-06-28 | A kind of oil pipe threaded connector with multi-sealed face screw thread positive-angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855042A (en) * | 2021-01-26 | 2021-05-28 | 中国石油天然气集团有限公司 | Special screwed joint for steel pipe |
| CN113914787A (en) * | 2020-07-10 | 2022-01-11 | 中国海洋石油集团有限公司 | High-temperature-resistant bidirectional thread sealing structure |
Citations (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 |
| CN207499814U (en) * | 2017-07-26 | 2018-06-15 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of antitorque connector of dual stage shoulder |
| CN208587109U (en) * | 2018-06-28 | 2019-03-08 | 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 |
-
2018
- 2018-06-28 CN CN201810705970.XA patent/CN108843254A/en active Pending
Patent Citations (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 |
| CN207499814U (en) * | 2017-07-26 | 2018-06-15 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of antitorque connector of dual stage shoulder |
| CN208587109U (en) * | 2018-06-28 | 2019-03-08 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914787A (en) * | 2020-07-10 | 2022-01-11 | 中国海洋石油集团有限公司 | High-temperature-resistant bidirectional thread sealing structure |
| CN113914787B (en) * | 2020-07-10 | 2023-11-24 | 中国海洋石油集团有限公司 | High-temperature-resistant bidirectional thread sealing structure |
| CN112855042A (en) * | 2021-01-26 | 2021-05-28 | 中国石油天然气集团有限公司 | Special screwed joint for steel pipe |
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