CN206174882U - Oil jacket pipe with thread form - Google Patents
Oil jacket pipe with thread form Download PDFInfo
- Publication number
- CN206174882U CN206174882U CN201621027770.6U CN201621027770U CN206174882U CN 206174882 U CN206174882 U CN 206174882U CN 201621027770 U CN201621027770 U CN 201621027770U CN 206174882 U CN206174882 U CN 206174882U
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- CN
- China
- Prior art keywords
- threaded portion
- tubing
- thread
- angle
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides an oil jacket pipe with thread form, includes body, tubing coupling, the body with the tubing coupling cooperation connects as an organic wholely soon and connects the whole parallel and level state that is in back, the body with tubing coupling's cooperation connects soon and is formed with the threaded portion on the face, the threaded portion is buttress thread, and the threaded portion go up to open and to have loading end angle and spigot surface angle, the threaded portion's loading end angle is 3, the spigot surface angle is 10, the body with be formed with moment of torsion circular bead part on tubing coupling's the sealed fastening face, moment of torsion circular bead part with does the radial contained angle of body do 15. The utility model discloses connect function and sealed function separately, loading end and spigot surface through the threaded portion reduce various thread gluing phenomenons, sealed effect is strengthened with the cooperation of moment of torsion circular bead part to the threaded portion's metal seal face simultaneously, even under crooked and compound loading, guarantee still that the gas tightness is good, and break out that sealing performance is still good on repeated.
Description
Technical field
This utility model is related to a kind of tubing and casing with form of thread.
Background technology
Tubing and casing is requisite a kind of oil country tubular good in oil and natural gas exploitation, and wherein connection screw thread is whole
Most weak link in individual tubing string, with oil, increasingly harsh, the short round threads of API of current tubing and casing of gas well drilling condition
And long round thread, API buttress threads have been difficult to meet existing use requirement, for example, although API standard round thread is with close
Sealing property is good, interchangeability is good, but bonding strength is low, only the 60%~80% of body；Although API buttress thread bonding strengths
It is good, but due to tooth-shape structure design problem, cause its poor sealing performance, API screw threads not only to undertake linkage function, and to hold
Load sealing function, so for API nipples, whether round thread form or buttress thread form, had both made joint
Machining tolerance be zero, after joint is tightened, can all produce certain fit clearance between internal and external screw thread, the gap in the shape of a spiral,
The interior or exterior space of sleeve pipe can be connected, the leakage path of fluid is formed, is only filled by thread compound, API screw threads just can play close
Envelope is acted on.But it is rotten that thread compound is easy to volatilization, especially when downhole temperature is higher, volatilize and go bad faster, at this moment it is blocked up
The effect of plug leakage path is remarkably decreased, and when the pressure of fluid especially gas in joint is higher, API nipples are easy to
Generation leakage accident.
Utility model content
This utility model is directed to the deficiencies in the prior art, there is provided a kind of to can effectively solve the problem that having for above-mentioned technical problem
The tubing and casing of form of thread.
In order to solve above-mentioned technical problem, this utility model is addressed by following technical proposals：
A kind of tubing and casing with form of thread, including body, tubing coupling, the body coordinates with the tubing coupling
Spin after being integrated and connecting integrally in concordant state, the body and the cooperation of the tubing coupling to spin and be formed with spiral shell on face
Stricture of vagina part, the threaded portion is to be provided with loading end angle and spigot surface angle, the spiral shell on buttress thread, and threaded portion
The loading end angle of stricture of vagina part is 3 °, spigot surface angle is 10 °, the body and shape in the sealing fastening face of the tubing coupling
Into there is torque shoulder part, the torque shoulder part is -15 ° with the radial direction angle of the body.
Metallic sealing section is formed with the threaded portion, the metallic sealing section of the threaded portion is radially sealed.
The radial seal of the metallic sealing section of the threaded portion can for the conical surface/conical surface, the conical surface/sphere, cylinder/sphere,
Any one version in cylinder/cylinder, sphere/sphere.
The specification of the threaded portion is 2-3/8 "-2/8 " 8 teeth/inch；3-1/2 "-41/2 " 6 teeth/inch；5 " with
Upper 5 teeth/inch.
Phosphate coating or copper plate are formed with the outer surface of the threaded portion.
Beneficial effect：Compared with prior art, it has the advantages that this utility model：
The tubing and casing that this utility model has form of thread separates linkage function and sealing function, by threaded portion
Loading end reduces various thread gluing phenomenons with spigot surface, while the metallic sealing section of threaded portion coordinates with torque shoulder part adding
Strong sealing effectiveness, even if under bending and Action of Combined Loads, stiling provide excellent air-tightness, through repeating to be unloaded on constantly
Button, sealing property is still good.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of description, and in order to allow above and other purpose of the present utility model, feature
Can become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Description of the drawings
Fig. 1 is the schematic diagram of the tubing and casing with form of thread；
Fig. 2 is the performance schematic diagram of the tubing and casing with form of thread.
Fig. 3 is the contact pressure scattergram of the threaded portion of the tubing and casing with form of thread.
Specific embodiment
As shown in Figure 1, 2, a kind of tubing and casing with form of thread, including body 1, tubing coupling 4, body 1 and oil pipe
It is in integrally concordant state that the cooperation of box cupling 4 spins after being integrated and connecting, it is ensured that intensity meets or exceeds body after connection, while
The turbulent flow phenomenon of gas or liquid in pipeline is effectively reduced, the loss of energy, body 1 and tubing coupling 4 is reduced
Coordinate and threaded portion 2 is formed with the face that spins, threaded portion 2 is to be provided with loading end angle on buttress thread, and threaded portion 2
With spigot surface angle, the loading end angle of threaded portion 2 is 3 °, spigot surface angle is 10 °, selects to carry 3 ° of face angle, spigot surface
The threaded portion 2 that 10 ° of angle can ensure that joint does not occur failure of threading off, and so as to give full play of the potentiality of thread material, meet
The requirement of bonding strength, threaded portion 2 not only has higher bonding strength, and is easy to process and detects, so as to reduce
The cost of joint, specifically, the specification of threaded portion 2 is 2-3/8 "-2/8 " 8 teeth/inch；3-1/2 "-4 1/2 " 6 teeth/
Inch；5 " 5 teeth/inch more than, improves the discontinuity problem of each pitch thread so that the joint of threaded portion 2 is carried in stretching
Under lotus effect, each pitch thread stress, so as to optimize the joint of threaded portion 2, is formed than more uniform on the outer surface of threaded portion 2
There are phosphate coating or copper plate, the resistance to corrosion to improving threaded portion 2 is favourable, and on threaded portion 2 metallic sealing section is formed with,
The metallic sealing section of threaded portion 2 is radially sealed, the radial seal of the metallic sealing section of threaded portion 2 can for the conical surface/conical surface,
Any one version in the conical surface/sphere, cylinder/sphere, cylinder/cylinder, sphere/sphere, with Φ 177.8mm ×
As a example by the N80 steel-grade bushings of 9.19mm, set up computation model, study sealing structure be respectively the conical surface/conical surface, the conical surface/sphere,
In the case of cylinder/sphere, the contact pressure distribution situation on metallic sealing section is detained, vacation during upper button in the control of joint opsition dependent
If the radial interference amount of threaded portion 2 is 0.16mm, the axial magnitude of interference of torque shoulder part 3 is 0.05mm, primary sealing area
Radial interference amount be 0.12mm, the taper 1 of the conical surface wherein in the conical surface/conical surface, the conical surface/spherical structure:10, the conical surface/sphere, post
The radius R=7mm of sphere in face/spherical structure.Tensile load P is continued to after upper button, the size of P is given by:
P=0.8 σ sA=0.8 × σ s × π (D2-d2) ÷ 4=2150kN
σ s in formula --- sleeve pipe yield strength, 552Mpa
D --- outer tube diameter, 177.8mm
D --- internal diameter of tube body, 159.42mm
Upper button, in the case of button+tensile load, the contact pressure on the conical surface/conical surface, the conical surface/sphere, cylinder/sphere
Distribution situation is as shown in Figure 3.
According to the joint sealing mechanism of threaded portion 2, the contact pressure on metallic sealing section is higher, contact area is wider,
Then the sealing of butt joint is more favourable, if selecting the conical surface/conical surface form, contact area is wider, can under same contact pressure
Preferable sealing effectiveness is obtained, is said from this angle, the conical surface/conical surface form is conducive to obtaining better seal performance.
Further, torque shoulder part 3, torque shoulder part are formed with body 1 and the sealing fastening face of tubing coupling 4
3 is -15 ° with the radial direction angle of body 1, improves the joint composite bearing ability of threaded portion 2；With conventional right angle shoulder phase
Than reverse shoulder has better seal effect, assembles in this case, and very high contact pressure can be produced at reverse shoulder
Power, for the N80 steel-grade bushings of 177.8 × 9.19mm of Φ, contact pressure herein, can between 800Mpa~1000Mpa
Good sealing effectiveness is played, compared with right angle shoulder, reverse shoulder remains to keep higher contact pressure under tensile load,
And tensile load one of topmost load when to be sleeve pipe work, apply axially to draw on the joint of threaded portion 2 after mounting
Load is stretched, load value is the 10~80% of the yield strength of body 1, loads once at interval of 10%, now the metal of threaded portion 2
The contact pressure of the conical surface/conical surface seal of sealing surface is not affected by axial load substantially, and -15 ° of torque shoulder part 3 exists
After axial tension load, its sealability is substantially better than right angle shoulder, and torque shoulder part 3 can absorb twist buckle in a part
Square, the magnitude of interference for making threaded portion 2 reduces, the harmful circumferential stress produced after tightening so as to the joint for reducing threaded portion 2,
The stress level of the joint of threaded portion 2 is advantageously reduced, Thread-sticking is prevented.
Embodiment described above is only that preferred implementation of the present utility model is described, not to this practicality
New spirit and scope are defined.On the premise of without departing from this utility model design concept, this area ordinary person couple
Various modifications and improvement that the technical solution of the utility model is made, all should drop into protection domain of the present utility model, this reality
With the new technology contents being claimed, all record in detail in the claims.
Claims (5)
1. a kind of tubing and casing with form of thread, including body (1), tubing coupling (4), the body (1) and the oil pipe
It is in integrally concordant state that box cupling (4) cooperation spins after being integrated and connecting, it is characterised in that the body (1) and the oil pipe
The cooperation of box cupling (4) spins the threaded portion (2) that be formed with face, and the threaded portion (2) is buttress thread, and threaded portion
(2) loading end angle and spigot surface angle are provided with, the loading end angle of the threaded portion (2) is 3 °, spigot surface angle is
10 °, in the body (1) and the sealing fastening face of the tubing coupling (4) torque shoulder part (3), the moment of torsion are formed with
Shoulder portion (3) is -15 ° with the radial direction angle of the body (1).
2. the tubing and casing with form of thread according to claim 1, it is characterised in that shape on the threaded portion (2)
Radially seal into the metallic sealing section for having metallic sealing section, the threaded portion (2).
3. the tubing and casing with form of thread according to claim 2, it is characterised in that the gold of the threaded portion (2)
The radial seal of category sealing surface can be appointing in the conical surface/conical surface, the conical surface/sphere, cylinder/sphere, cylinder/cylinder, sphere/sphere
A kind of version.
4. the tubing and casing with form of thread according to claim 1, it is characterised in that the rule of the threaded portion (2)
Lattice are 2-3/8 "-2/8 " 8 teeth/inch；3-1/2 "-41/2 " 6 teeth/inch；5 " 5 teeth/inch more than.
5. the tubing and casing with form of thread according to claim 1, it is characterised in that the threaded portion (2) it is outer
Phosphate coating or copper plate are formed with surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621027770.6U CN206174882U (en) | 2016-08-31 | 2016-08-31 | Oil jacket pipe with thread form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621027770.6U CN206174882U (en) | 2016-08-31 | 2016-08-31 | Oil jacket pipe with thread form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206174882U true CN206174882U (en) | 2017-05-17 |
Family
ID=58675470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621027770.6U Expired - Fee Related CN206174882U (en) | 2016-08-31 | 2016-08-31 | Oil jacket pipe with thread form |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206174882U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736724A (en) * | 2019-02-18 | 2019-05-10 | 天津钢管集团股份有限公司 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
-
2016
- 2016-08-31 CN CN201621027770.6U patent/CN206174882U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736724A (en) * | 2019-02-18 | 2019-05-10 | 天津钢管集团股份有限公司 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
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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 |
Granted publication date: 20170517 Termination date: 20200831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |