CN206539317U - Tubing and casing jointing - Google Patents
Tubing and casing jointing Download PDFInfo
- Publication number
- CN206539317U CN206539317U CN201720170528.2U CN201720170528U CN206539317U CN 206539317 U CN206539317 U CN 206539317U CN 201720170528 U CN201720170528 U CN 201720170528U CN 206539317 U CN206539317 U CN 206539317U
- Authority
- CN
- China
- Prior art keywords
- box cupling
- sealing surface
- screw thread
- face
- cylinder
- 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.)
- Active
Links
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model belongs to petroleum pipeline technical field, is related to a kind of tubing and casing jointing, including nipple body, and the nipple body includes the box cupling and body connected that cooperate, it is characterised in that：The box cupling inwall centre position is provided with a boss, and boss both sides set connecting portion respectively, and the connecting portion includes box cupling circular bead surface, box cupling sealing surface one, the box cupling face of cylinder, box cupling sealing surface two and the box cupling screw thread outwards set gradually along boss；The connection end of the body is sequentially provided with body circular bead surface, body sealing surface one, the face of cylinder of body first, body sealing surface two, the face of cylinder of body second and body screw thread.The utility model product design is skillfully constructed rationally, due to using dual interference seal structure, sealed reliable, with premium properties such as stable connection, high-air-tightness, high bonding strength, high resistance to compression, high anti-torsions.
Description
Technical field
The utility model belongs to petroleum pipeline technical field, is related to a kind of tubing and casing jointing.
Background technology
Various routines and Unconventional gas belong to important clean energy resource, its mining type be by build well,
To set up the passage that natural gas is exported from underground, its well depth is up to hundreds of to thousands of rice, mainly by the single stone for being about 10m
Tubing and casing and petroleum oil, the whole petroleum casing pipe tubing string formed threadably and petroleum oil tubing string are constituted；Should
A variety of load such as the tubing string of tubing and casing both needs to bear to stretch, compresses, bends, internal pressure, external pressure, but also have different temperature
And etching condition, therefore high requirement is proposed to its most weak joint area especially.Generally, oil sleeve joint is used
API nipples, API nipples are only to contain circular cone spiral shell in the nipple that API Std is proposed, its structure
Line, specifically again be divided into API NU nipples, API EU nipples, API STC nipples, API LC nipples and
API BC nipples, these are the problems such as joint generally existing gas sealing ability is very low, connective stability is poor, and therein
Also there is the problem of bonding strength is relatively low in API NU nipples, API STC nipples and API LC nipples, so
API joints can not meet the service condition of gas well.The special of high-air-tightness therefore, domestic and international tubing and casing producer begins one's study one after another
Nipple, is designed by optimizing thread tooth, sets up the measure such as metal interference sealing structure and screw thread twist-on control shoulder, made
Excellent performance can be had by obtaining the Special threading connector of the type, the need for tackling gas well construction.
The content of the invention
The utility model is in view of the above-mentioned problems, provide a kind of tubing and casing jointing, and the joint performance is excellent, sealing
It is good.
According to the technical solution of the utility model：A kind of tubing and casing jointing, including nipple body, the screw thread
Joint body includes the box cupling and body connected that cooperate, it is characterised in that：The box cupling inwall centre position is convex provided with one
Platform, boss both sides set connecting portion respectively, and the connecting portion is close including box cupling circular bead surface, the box cupling outwards set gradually along boss
Front cover one, the box cupling face of cylinder, box cupling sealing surface two and box cupling screw thread；The connection end of the body be sequentially provided with body circular bead surface,
Body sealing surface one, the face of cylinder of body first, body sealing surface two, the face of cylinder of body second and body screw thread；Box cupling and body
During mating connection, box cupling circular bead surface and body circular bead surface abutting contact, box cupling sealing surface one and the abutting contact of body sealing surface one,
Form annular spaces between the box cupling face of cylinder and the face of cylinder of body first, box cupling sealing surface two and body sealing surface two are against connecing
Touch, box cupling screw thread is meshed with body screw thread and is connected.
As further improvement of the utility model, box cupling mistake is passed through between the box cupling circular bead surface and box cupling sealing surface one
Cross arc transition connection；Connected between the body circular bead surface, body sealing surface one by the transition of body transition arc.
As further improvement of the utility model, the box cupling sealing surface one, body sealing surface one are cone seal
Face.
As further improvement of the utility model, the box cupling sealing surface two is revolution arc surface, body sealing surface two
For circular conical surface.
As further improvement of the utility model, the box cupling screw thread is the conical internal threads of substantially trapezoidal shape,
Body screw thread is the Conical external threads of substantially trapezoidal shape, after box cupling screw thread is engaged with body screw thread, the tooth root of box cupling screw thread
Space is formed between circumferential surface and the tooth top circumferential surface of body screw thread, box cupling screw thread and both body screw threads are mutual vertically
The tooth form of cooperation bear tensile load end abut, the other end formation gap.
It is of the present utility model to have technical effect that：The utility model product design is skillfully constructed rationally, due to using dual
Interference seal structure, sealed reliable, with stable connection, high-air-tightness, high bonding strength, high resistance to compression, high anti-torsion
Deng premium properties.
Brief description of the drawings
Fig. 1 is the structural representation of oil sleeve joint of the present utility model.
Fig. 2 is enlarged diagram at A in Fig. 1.
Fig. 3 is pipe structure schematic diagram.
Fig. 4 is enlarged diagram at B in Fig. 3.
The enlarged drawing that Fig. 5 is interference fitted for Fig. 1 sealing surface and circular bead surface.
The enlarged drawing that Fig. 6 engages for Fig. 1 screw thread.
Embodiment
Embodiment of the present utility model is further described below in conjunction with the accompanying drawings.
In Fig. 1 ~ 6, including nipple body 1, box cupling 2, box cupling circular bead surface 3, tensile side 4, box cupling screw thread 5,6, body
Circular bead surface 7, body screw thread 8, body 9, box cupling sealing surface 1, box cupling transition arc 11, the box cupling face of cylinder 12, box cupling sealing surface
2 13, compressed side 14, body transition arc 15, body sealing surface 1, first face of cylinder of body 17, body sealing surface 2 18,
Body second face of cylinder 19, the first interference 20, the second interference 21, the 3rd interference 22 etc..
As shown in Fig. 1 ~ 6, the utility model is a kind of tubing and casing jointing, including nipple body 1, the screw thread
Joint body 1 includes the box cupling 2 and body 9 of mutual cooperation connection, and the inwall centre position of box cupling 2 is provided with a boss, boss
Both sides set connecting portion respectively, and the connecting portion includes box cupling circular bead surface 3, the box cupling sealing surface one outwards set gradually along boss
10th, the box cupling face of cylinder 12, box cupling sealing surface 2 13 and box cupling screw thread 5；The connection end of the body 9 is sequentially provided with body circular bead surface
7th, body sealing surface 1, first face of cylinder of body 17, body sealing surface 2 18, second face of cylinder of body 19 and body screw thread 8；
When box cupling 2 is connected with body 9, box cupling circular bead surface 3 and the abutting contact of body circular bead surface 7, box cupling sealing surface 1 and body
The abutting contact of sealing surface 1, forms annular spaces, box cupling sealing surface between the box cupling face of cylinder 12 and first face of cylinder of body 17
2 13 are meshed with body screw thread 8 and are connected with the abutting contact of body sealing surface 2 18, box cupling screw thread 5.
Connected between box cupling circular bead surface 3 and box cupling sealing surface 1 by the transition of box cupling transition arc 11；The body platform
Connected between shoulder face 7, body sealing surface 1 by the transition of body transition arc 15.
Box cupling sealing surface 1, body sealing surface 1 are conical seal surface.
Box cupling sealing surface 2 13 is revolution arc surface, and body sealing surface 2 18 is circular conical surface.
Box cupling screw thread 5 is the internal thread of substantially trapezoidal shape, and body screw thread 8 is the external screw thread of substantially trapezoidal shape, box cupling
After screw thread 5 is engaged with body screw thread 8, shape between the tooth root circumferential surface of box cupling screw thread 5 and the tooth top circumferential surface of body screw thread 8
Into gap, tooth form one end 4 that both box cupling screw thread 5 and body screw thread 8 cooperate vertically is abutted, the other end 14 is formed
Gap.
The first interference 20, box cupling sealing surface 1 and body sealing surface are formed between box cupling circular bead surface 3 and body circular bead surface 7
The second interference 21 is formed between one 16, the 3rd interference 22 is formed between box cupling sealing surface 2 13 and body sealing surface 2 18.
Operationally, the convex platform both sides of box cupling 2 are connected the utility model product with a body 9 respectively, therefore, box cupling
Screw thread 5 and body screw thread 8 by by the half-angle of the tensile side 4 of thread tooth by that on the occasion of changing into negative value, can bear it
Radial effects during axial tensile loads produced by new designs of threaded joints body 1 are switched to mutually as both body 9 and box cupling 2 are disconnected from each other
Mutually lock, so as to improve the bonding strength and sealing property of its nipple body 1；Thereby determine that the utility model body screw thread
8 and body 9 bear tensile load side tooth form half-angle be -1 ~ -6 °, bear compressive load side tooth form half-angle be 10 ~ 25 °, phase
A height of 0.75 ~ the 2.35mm of thread that answers, the tooth discrepancy in elevation of internal and external threads are that 0.05 ~ 0.25mm, pitch are 8 ~ 3.5 buttons/inch, taper
For 1: 10 ~ 1: 4.
Metal interference sealing structure of the present utility model seals for kinds of point mode, wherein by the He of box cupling sealing surface 1 at one
Body sealing surface 1 is constituted, another place is made up of box cupling sealing surface 2 13 and body sealing surface 2 18, is all provided with two sealings
The magnitude of interference is put；The taper of box cupling sealing surface 1 and body sealing surface 1 at its metal interference sealing surface one is 65% ~
125%th, the radial interference amount of the two（Diameter）For 0.42 ~ 0.82mm, the body sealing surface 2 18 at its metal interference sealing surface two
Taper be that the arc radius of 35% ~ 50%, box cupling sealing surface 2 13 is R3.50 ~ 10.0mm, the radial interference amount of the two（Diameter）
For 0.18 ~ 0.50mm；The radius of body transition arc 15 between body sealing surface 1 and body circular bead surface 7 be R0.60 ~
The radius of box cupling transition arc 11 between 1.30mm, box cupling sealing surface 1 and box cupling circular bead surface 3 is R0.40 ~ 1.10mm, the two
Difference between transition arc radius is 0.10 ~ 0.50mm；With body first between body sealing surface 1 and body sealing surface 2 18
The face of cylinder 17 is connected, and is connected between box cupling sealing surface 1 and box cupling sealing surface 2 13 with the box cupling face of cylinder 12.
Box cupling circular bead surface 3 and body circular bead surface 7 and respective axis in the utility model product（It is positive）Between angle（Platform
Shoulder face angle）For 65 ~ 85 °.Its corresponding body circular bead surface angle and external screw thread tensile side toothed surface and axis（It is positive）Angle two
The difference of person is -5 ~ -30 °；Angle difference is in negative value, represent tighten and bear stretching or during compressive load, it is of the present utility model
Body 9 and box cupling 2 between sealing structure position one（I.e. between box cupling sealing surface 1 and body sealing surface 1）Diametrically
Locking effect can be produced, this is conducive to the sealing property for improving the utility model product.
Claims (5)
1. a kind of tubing and casing jointing, including nipple body（1）, the nipple body（1）Including cooperating
The box cupling of connection（2）With body（9）, it is characterised in that：The box cupling（2）Inwall centre position is provided with a boss, boss both sides
Connecting portion is set respectively, and the connecting portion includes the box cupling circular bead surface outwards set gradually along boss（3）, box cupling sealing surface one
（10）, the box cupling face of cylinder（12）, box cupling sealing surface two（13）And box cupling screw thread（5）；The body（9）Connection end be sequentially provided with
Body circular bead surface（7）, body sealing surface one（16）, the face of cylinder of body first（17）, body sealing surface two（18）, body second justifies
Cylinder（19）And body screw thread（8）；Box cupling（2）With body（9）During mating connection, box cupling circular bead surface（3）With body circular bead surface（7）
Abutting contact, box cupling sealing surface one（10）With body sealing surface one（16）Abutting contact, the box cupling face of cylinder（12）With body first
The face of cylinder（17）Between form annular spaces, box cupling sealing surface two（13）With body sealing surface two（18）Abutting contact, box cupling spiral shell
Line（5）With body screw thread（8）Be meshed connection.
2. tubing and casing jointing as claimed in claim 1, it is characterised in that：The box cupling circular bead surface（3）Sealed with box cupling
Face one（10）Between pass through box cupling transition arc（11）Transition is connected；The body circular bead surface（7）, body sealing surface one（16）It
Between pass through body transition arc（15）Transition is connected.
3. tubing and casing jointing as claimed in claim 1, it is characterised in that：The box cupling sealing surface one（10）, body it is close
Front cover one（16）It is circular conical surface.
4. tubing and casing jointing as claimed in claim 1, it is characterised in that：The box cupling sealing surface two（13）For turning circle
Cambered surface, body sealing surface two（18）For circular conical surface.
5. tubing and casing jointing as claimed in claim 1, it is characterised in that：The box cupling screw thread（5）To be substantially trapezoidal
The conical internal threads of shape, body screw thread（8）For the Conical external threads of substantially trapezoidal shape, box cupling screw thread（5）With body spiral shell
Line（8）After engagement, box cupling screw thread（5）Tooth root circumferential surface and body screw thread（8）Tooth top circumferential surface between form space,
Box cupling screw thread（5）With body screw thread（8）Both tooth forms for cooperating vertically bear tensile load end abut, it is another
End forms gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720170528.2U CN206539317U (en) | 2017-02-24 | 2017-02-24 | Tubing and casing jointing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720170528.2U CN206539317U (en) | 2017-02-24 | 2017-02-24 | Tubing and casing jointing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206539317U true CN206539317U (en) | 2017-10-03 |
Family
ID=59948859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720170528.2U Active CN206539317U (en) | 2017-02-24 | 2017-02-24 | Tubing and casing jointing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206539317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
-
2017
- 2017-02-24 CN CN201720170528.2U patent/CN206539317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201507731U (en) | Oil casing threaded connection joint | |
| CN202380985U (en) | Tubular air seal thread joint | |
| CN105927167B (en) | A kind of special thread hermetic seal oil sleeve joint for ultradeep well | |
| CN201496003U (en) | Thread connector of special oil sleeve | |
| CN101696621B (en) | Air-tight seal screw joint | |
| CN206539317U (en) | Tubing and casing jointing | |
| CN102678065A (en) | High-airtightness special buttress thread pipe joint | |
| CN104563904B (en) | Sealing connecting structure of casing of gas well | |
| CN201412076Y (en) | Oil sleeve connector | |
| CN106761462B (en) | A kind of oil well casing special nipple | |
| CN201874485U (en) | Metal sealed casing threaded connecting structure based on API (American Petroleum Institute) standard round threads | |
| CN202673178U (en) | High-sealing buttress threaded conduit connecting joint | |
| CN101899953A (en) | Thread joint structure for high-performance oil casing | |
| CN105221081B (en) | A kind of elastic packing helicitic texture | |
| CN202090850U (en) | Pipeline connecting piece between thread and conical seal surface with limited circular bead | |
| CN202081837U (en) | Stress-resistant threaded connector with corrosive gas sealing sleeve | |
| CN202125258U (en) | Oil sleeve connector with high sealing performance and thread-gluing resistance | |
| CN207647476U (en) | Double-sealing face Special threading connector | |
| CN102852466A (en) | Special buttress thread oil sleeve connecting joint | |
| CN202788653U (en) | Hermetic seal thread connection device used for SEW oil casings | |
| CN201778676U (en) | Low pressure-resistant air-tight seal sleeve joint | |
| CN206329284U (en) | A kind of dual hermetic seal special buckle oil pipe of metallic elastic | |
| CN209855720U (en) | Novel sealed oil casing structure that detains | |
| CN204040938U (en) | A kind of Oil/gas Well thimble assembly | |
| CN102587845A (en) | Air-sealing casing screwed connector interchangeable with API (American petroleum institute) round thread |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |