CN206158608U - Special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe - Google Patents
Special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe Download PDFInfo
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- CN206158608U CN206158608U CN201621166014.1U CN201621166014U CN206158608U CN 206158608 U CN206158608 U CN 206158608U CN 201621166014 U CN201621166014 U CN 201621166014U CN 206158608 U CN206158608 U CN 206158608U
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- torque shoulder
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Abstract
The utility model provides a special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe, belongs to oily casing thread connection technology field, including coupling, body two parts, is equipped with threaded connection portion, oil storage escape, seal structure, transition circular arc and moment of torsion circular bead in proper order on the contact surface of body and coupling. The screw thread has adopted the inclined to one side ladder type screw thread of optimizing, and the oil storage escape is located between threaded connection portion and the seal structure, the conical sealing surface of seal structure on by the coupling forms with spherical sealed facial features extrusion contact on the body, all is equipped with the moment of torsion circular bead on coupling and the body, does the inclination theta of moment of torsion circular bead do 7 O ~ 10o is equipped with the transition circular arc between sealed face and the moment of torsion circular bead. Through screw thread and seal structure's optimal design, overcome current screwed joint's shortcoming, have that processing / detection is convenient, joint strength is high, resist turn round, the resistance to compression is contracted, anti characteristics of meeting an emergency.
Description
Technical field
The utility model is related to a kind of gas well at HTHP tubing and casing Special threading connector, belongs to oil casing threaded connection
Technical field.
Background technology
Tubing and casing is oil country tubular good necessary to exploitation oil and natural gas, and hundreds of sleeve pipe has been threaded connection
Come, the technology of threaded connection is to affect the reliable key technology of drilling process safety.The western many oil gas fields of China have 150 DEG C
The characteristics of high temperature and more than 55MPa high pressure, need the nipple with highly reliable sealing under complex working condition.Common
API nipple poor sealing performances, bonding strength are low, it is impossible to meet use requirement, it is necessary to could be expired using Special threading connector
Sufficient its sealing property is required, and the air-sealed special threaded joint presence that the shoulder for adopting at present is combined with sealing surface is following several
Shortcoming：
1）Using buttress thread spigot surface angle it is little, be difficult make-up, easy thread gluing；
2）Sealing surface is caused to process, is detected not using internal thread machining sphere or the structure design of processing multistage dense front cover
It is convenient；
3）The strain space being not provided with complex working condition, it is difficult to which reaching a high temperature will with the hermetic seal under high pressure complex working condition
Ask；
4）Sealing station is remote away from pipe end, and sliding distance is long, the easy thread gluing of sealing surface, causes sealing under high temperature and high pressure condition to be lost
Effect；
5）Easily there is shear fracture failure in -15 or -20 torque shoulders, compressive load lower shoulder.
The content of the invention
The utility model is directed to the deficiencies in the prior art, there is provided a kind of gas well at HTHP tubing and casing special thread connects
Head, with processing/easy to detect, bonding strength is high, anti-galling, it is anti-cross turn round, it is incompressible, strain resistant the characteristics of, disclosure satisfy that 180
DEG C, the gas well use requirement under the complex working condition of more than 55MPa.
To solve above-mentioned technical problem, the utility model is adopted the technical scheme that：
A kind of gas well at HTHP tubing and casing Special threading connector, including box cupling and body two parts.On the box cupling
It is sequentially provided with internal thread, oil storage escape, conical seal (contact) face, transition concave arc and torque shoulder；The body end sets successively
There are external screw thread, the face of cylinder, spherical seal surface, transition dome arc and torque shoulder.The conical seal (contact) face and spherical seal surface phase
Extruding contact forms sealing structure；The box cupling torque shoulder holds out against mutually with body torque shoulder, forms axial interference and matches somebody with somebody, and turns round
The tilt angle theta of square shoulder is -7 °～-10 °；The transition dome arc forms geometric space with transition concave arc, can be high temperature
Stress deformation under high pressure complex working condition provides free space.- 7～-10 reverse torque shoulder of low-angle can strengthen joint
Resistance to compression, can also obtain thicker pin thread nose, prevent seal facial disfigurement, reach aid under preferable HTHP it is close
Envelope effect.Reverse torque shoulder is set and is acted on position, anti-moment of torsion of crossing above is anchored, it is to avoid sealing surface thread gluing, reduce complicated work
The seal failure risk that thread gluing is caused under condition.
Further, internal thread and external screw thread are the buttress thread of optimization, and spigot surface angle beta is 30 °～45 °；Internal thread
A height of 1.70～the 1.85mm of tooth, a height of 1.50～1.70mm of external screw thread tooth；Thread taper is 1:16.Wide-angle spigot surface is easily right
Button, anti-galling is capable of achieving quick upper button.Internal and external screw thread tooth is high different so that existing between internal thread bottom of the tooth and external screw thread tooth top
The gap of wide 0.2mm, while the external screw thread face of cylinder also forms gap cooperation with box cupling oil storage escape, stores unnecessary screw thread
Fat, it is ensured that the contact stress in sealing structure, the sealing effectiveness under the high pressure that reaches a high temperature.
Further, the sealing contact position of sealing structure is at 3～5mm of male end；The box cupling cone seal
Face cone degree is 1/8～1/10；The radius of the body spherical seal surface is 40～90mm.Sealing contact position is designed away from outer spiral shell
At 3～5mm of line end, in the case of excellent sealing is kept, sliding distance is reduced, reduce sealing surface thread gluing risk；Spherical sealed
Face is processing, easy to detect in body portion.
Further, transition concave arc radius be 0.4～0.8mm, the transition dome arc radius be 0.9～1.2mm, mistake
The diameter for crossing dome arc is 1.2～2 times of transition concave arc diameter.Body transition is designed between sealing surface and torque shoulder convex
Circular arc and box cupling transition concave arc, the geometric space for cooperating when using and being formed can be effectively HTHP complexity work
Stress deformation under condition provides free space, effective protection sealing surface and torque shoulder, further enhances hermetic seal effect.
It is using the beneficial effect produced by above-mentioned technical proposal：
1）Threaded connection intensity is enhanced by the buttress thread for optimizing, quick upper button is capable of achieving, Thread-sticking wind is reduced
Danger；
2）The sealing structure of optimization and reverse torque shoulder, reduce sealing surface thread gluing risk, under solving HTHP
Seal failure problem caused by sealing surface thread gluing, and process, it is easy to detect, it is easy to accomplish production；
3）The reverse shoulder of low-angle has prevents sealing facial disfigurement, the strong effect of resistance to compression, and arranging transition arc can
Strain space under HTHP complex working condition, effective protection sealing surface and torque shoulder are provided, gas well at HTHP is met
Sealing use requirement.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is form of thread figure of the present utility model.
Fig. 3 is the enlarged diagram of the utility model box cupling sealing surface.
Fig. 4 is the enlarged diagram of the utility model body sealing surface.
In figure：1st, box cupling；2nd, internal thread；3rd, oil storage escape；4th, conical seal (contact) face；5th, transition concave arc；6th, moment of torsion platform
Shoulder；7th, body；8th, external screw thread；9th, the face of cylinder；10th, spherical seal surface；11st, transition dome arc；12nd, torque shoulder；13rd, carry
Face；14th, spigot surface；H1, external screw thread tooth are high；H2, internal thread tooth are high.
Specific embodiment
For clearer description the utility model, the utility model is made with reference to the accompanying drawings and detailed description into
One step is described in detail.
As shown in figure 1, a kind of gas well at HTHP tubing and casing Special threading connector, by box cupling 1 and two parts group of body 7
Into.Internal thread 2, oil storage escape 3, conical seal (contact) face 4, transition concave arc 5 and torque shoulder 6 are sequentially provided with box cupling 1；
The end of body 7 is sequentially provided with external screw thread 8, the face of cylinder 9, spherical seal surface 10, transition dome arc 11 and torque shoulder 12.Use
When, internal thread 2 intermeshes with external screw thread 8, and for joint enough bonding strengths are provided；The upper conical sealing surface 4 of box cupling and body
Upper spherical seal surface 10 mutually extrudes contact and forms sealing structure, prevents high pressure gas leakage, makes joint have hermetic seal effect；Connect
Hoop transition concave arc 5 and the stress deformation that the geometric space that body transition dome arc 11 is formed is under HTHP, complex working condition
There is provided free space, can effective protection sealing structure and torque shoulder；Torque shoulder 6 is pushed up mutually with body torque shoulder 12
Tightly, form axial interference to match somebody with somebody, raising joint is anti-to cross torsion, resistance to compression.
As shown in Fig. 2 the external screw thread and internal thread are the inclined acme thread of optimization, phase between external screw thread and internal thread
The angle of loading end 13 of contact is 0 °, and low-angle loading end 13 improves the ability of joint stretch-proof and bending, improves screw thread company
Connect efficiency.Spigot surface 14 is 30 °～45 ° with the angle β of horizontal plane line in figure.The high h2 of the internal thread tooth is 1.70～
1.85mm, the high h1 of external screw thread tooth are 1.50～1.70mm.
Shown in Fig. 3, the taper of the conical seal (contact) face 4 is 1/8～1/10, and the oil storage escape 3 is located at threaded connection
Between portion and sealing surface；The radius of transition concave arc 5 is 0.4～0.8mm, the folder of horizontal plane vertical line in torque shoulder 6 and figure
Angle θ is -7～-10.
Shown in Fig. 4, the radius of the body spherical seal surface 10 is 40～90mm, and the face of cylinder 9 is located at threaded connection
Between portion and sealing surface；Transition dome arc 11 is located at the transition position of spherical seal surface 10 and torque shoulder 12, and arc radius are
0.9～1.2mm；The torque shoulder 12 of the body is mutually coincide with the torque shoulder 6 of box cupling and is contacted, and tilt angle theta is -7 °
～-10 °.Sealing surface seals forced position at 3～5mm of body end.
Technique effect is verified：Sleeve pipe of the specification for 139.7mm × 9.17mm P110-13Cr is added according to this technical scheme
Work Special threading connector, and full-scale evaluation test in kind is carried out after FEM Simulation, this is shown by correlation test
Special threading connector is let out under the operating mode of stretching/compressing, 60MPa internal pressures, 180 DEG C of high temperature and the ft of flexibility 20 °/100
Leakage, strength of joint can reach 100% body yield strength.Test shows that the Special threading connector bonding strength is high, gas sealing ability
It is good, meet HTHP, the use demand of complex working conditions gas well.
Claims (4)
1. a kind of gas well at HTHP tubing and casing Special threading connector, including box cupling (1) and body (7) two parts, it is described to connect
Internal thread (2), oil storage escape (3), conical seal (contact) face (4), transition concave arc (5) and torque shoulder are sequentially provided with hoop (1)
(6)；Body (7) end is sequentially provided with external screw thread (8), the face of cylinder (9), spherical seal surface (10), transition dome arc (11)
With torque shoulder (12)；It is characterized in that：The conical seal (contact) face (4) mutually extrudes with spherical seal surface (10) and contacts formation sealing
Structure；The box cupling torque shoulder (6) holds out against mutually with body torque shoulder (12), forms axial interference and matches somebody with somebody, torque shoulder
Tilt angle theta is -7 °～-10 °；The transition dome arc (11) forms geometric space with transition concave arc (5).
2. a kind of gas well at HTHP tubing and casing Special threading connector according to claim 1, it is characterised in that：It is described
Internal thread (2) and external screw thread (8) be optimization buttress thread, spigot surface（14）Angle beta is 30 °～45 °；Internal thread tooth is high（h2）
For 1.70～1.85mm, external screw thread tooth height（h1）For 1.50～1.70mm；Thread taper is 1:16.
3. a kind of gas well at HTHP tubing and casing Special threading connector according to claim 1, it is characterised in that：It is described
The sealing contact position of sealing structure is at 3～5mm of male end；The box cupling conical seal (contact) face（4）Taper is 1/8～1/
10；The radius of the body spherical seal surface (10) is 40～90mm.
4. a kind of gas well at HTHP tubing and casing Special threading connector according to claim 1, it is characterised in that：It is described
Transition concave arc (5) radius be 0.4～0.8mm, transition dome arc (11) radius be 0.9～1.2mm, transition dome arc
（11）Diameter be transition concave arc（5）1.2～2 times of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621166014.1U CN206158608U (en) | 2016-11-02 | 2016-11-02 | Special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621166014.1U CN206158608U (en) | 2016-11-02 | 2016-11-02 | Special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158608U true CN206158608U (en) | 2017-05-10 |
Family
ID=58655258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621166014.1U Active CN206158608U (en) | 2016-11-02 | 2016-11-02 | Special screwed joint of high temperature high pressure gas well oil expenses sleeve pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158608U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518184A (en) * | 2018-03-26 | 2018-09-11 | 天津商业大学 | A kind of new Joining Structure of oil well pipe and box cupling |
| CN109209254A (en) * | 2018-12-03 | 2019-01-15 | 中国石油天然气集团有限公司 | A kind of shale gas well Special threading connector |
| CN111878003A (en) * | 2020-09-27 | 2020-11-03 | 山东祺龙海洋石油钢管股份有限公司 | Unconventional wall directly links quick-assembling device |
| 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 |
-
2016
- 2016-11-02 CN CN201621166014.1U patent/CN206158608U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518184A (en) * | 2018-03-26 | 2018-09-11 | 天津商业大学 | A kind of new Joining Structure of oil well pipe and box cupling |
| CN109209254A (en) * | 2018-12-03 | 2019-01-15 | 中国石油天然气集团有限公司 | A kind of shale gas well Special threading connector |
| CN111878003A (en) * | 2020-09-27 | 2020-11-03 | 山东祺龙海洋石油钢管股份有限公司 | Unconventional wall directly links quick-assembling device |
| 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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