CN203531779U - Quick guide buckle special screwed joint - Google Patents
Quick guide buckle special screwed joint Download PDFInfo
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- CN203531779U CN203531779U CN201320625934.5U CN201320625934U CN203531779U CN 203531779 U CN203531779 U CN 203531779U CN 201320625934 U CN201320625934 U CN 201320625934U CN 203531779 U CN203531779 U CN 203531779U
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Abstract
The utility model relates to a quick guide buckle special screwed joint which comprises an internal thread piece (1) and an external thread piece (3). Internal threads (2) are arranged on the internal thread piece (1), and external threads (4) are arranged on the external thread piece (3). The quick guide buckle special screwed joint is characterized in that the internal threads (2) and the external threads (4) are both taper pipe threads, the taper of the taper pipe threads is 1:7.5, when the joint is used, the internal threads (2) and the external threads (4) are meshed with each other, and interference happens. The quick guide buckle special screwed joint has good thread gluing resistance performance, meanwhile, the connecting strength is improved, and the purpose that the joint is equal to a pipe body in strength is achieved. The quick guide buckle special screwed joint is suitable for being used in oil casings, and particularly suitable for being used in casings with large diameters.
Description
Technical field
The utility model relates to a kind of nipple, relates in particular to a kind of button Special threading connector of leading fast, belongs to oil pipe thread link technique field.
Background technology
The petroleum casing pipe that oil field is used at present, mostly adopt API round thread or API buttress thread to connect, the advantage of this screw thread is technology maturation, easily processing and detection, but also there are a lot of shortcomings simultaneously, easy thread alternating when its most outstanding shortcoming is upper button, badly recognizes button, further causes thread gluing to lose efficacy.Especially when sleeve pipe specification reaches 16 inches (406.4mm) when above, while detaining on Oil Field, be very easy to thread alternating occurs and cause serious thread gluing.Casing threads thread gluing meeting affects its quality of connection, and more serious thread gluing also can cause sleeve pipe to scrap.
The tapering of API casing round thread is generally 1:16, and thread depth is 1.801mm, and pitch is 3.175mm (8 teeth/25.4mm), and its bearing surface angle and spigot surface angle are all 30 °.The spigot surface of this screw thread is milder, but its pitch is little, easily thread alternating.The joint efficiency of this screw thread is low simultaneously, can only reach 60～80% of body.
The tapering of API buttress thread is the same with round thread, is generally 1:16.This thread depth is 1.575mm, and pitch is 5.08mm (5 teeth/25.4mm), and pitch increase is conducive to button, but its screw thread spigot surface angle is 10 °, steeper than round thread, is unfavorable for button, and its bearing surface angle is 3 °, has improved the joint efficiency of screw thread.
Find by prior art documents, Chinese patent notice of authorization number is CN 1065018C, and open day is April 25 calendar year 2001, and patent of invention name is called oil, casing thread connection, has provided a kind of joint form that can slow down or prevent Thread-sticking.This patent is comprised of body and pipe box cupling, and the reach on body is L4, and the reach on pipe box cupling is L7, the tapering of screw thread in diametric(al) is 1:M, M generally gets 16, and the tapering in the screw thread top certain length of its middle tube body or pipe box cupling is 1:(M-q), q=0.1～4.5.Meanwhile, the tapering in the screw tip certain length of body or pipe box cupling is set to 1:(M+q).This joint, owing to having changed tapering at screw thread two ends, has slowed down the stress concentration degree at screw thread two ends, makes screw thread be not easy to occur thread gluing.
But the limitation of above-mentioned patented technology is: although slowed down the stress at screw thread two ends, concentrate, the shortcoming of the easy thread alternating of joint, difficult make-up is not improved, and the possibility of screw thread generation thread gluing is still very large.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of thorough anti-stick button performance of improving screw thread is provided, and bonding strength improves, and what pull-out failure can not occur leads button Special threading connector fast.
The purpose of this utility model is achieved in that
A kind of button Special threading connector of leading fast, it comprises inner thread piece and external thread piece, on described inner thread piece, be processed with internal thread, on described external thread piece, be processed with external screw thread, it is characterized in that internal thread and external screw thread are taper pipe thread, the tapering of taper pipe thread is 1:7.5, when joint uses, internal thread and external screw thread intermesh, and produce interference.
As a kind of preferred, internal thread and externally threaded pitch are 8.467mm.
θ=45～60 °, screw thread spigot surface angle, γ=3 °, bearing surface angle, internal thread tooth depth H1, H1=2.23mm, external screw thread tooth depth H2, H2=2.15mm, thread pitch diameter line is h1 to the distance of tooth top, pitch diameter of external thread line is h2 to the distance at the bottom of tooth, and h1=h2=1.05mm.
Inner thread piece end changes into α angle, α=45～60 °, and external thread piece end changes into β angle, β=45～60 °.
Compared with prior art, the beneficial effects of the utility model are:
1, by increasing the way of thread pitch, thread taper, that has improved screw thread recognizes button performance, and make-up speed improves greatly simultaneously;
2, by changing the shape (increase screw thread spigot surface angle, change screw thread bearing surface angle into 3 °) of screw thread, make the easy make-up of joint, and avoided joint slippage, improved the bonding strength of joint.
Therefore this is led fast button Special threading connector and has good sticking-resistant performance, and bonding strength improves simultaneously, can reach and body equal strength.The present invention is suitable for petroleum casing pipe and adopts, and is particularly suitable for the sleeve pipe that diameter is larger and adopts.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model is led button Special threading connector fast.
Fig. 2 is internal thread and the externally threaded structural representation that the utility model is led button Special threading connector fast.
Wherein:
Inner thread piece 1, internal thread 2, external thread piece 3, external screw thread 4
Inner thread piece end thread chamfering α, external thread piece end thread undercut ss, internal thread tooth depth H1, external screw thread tooth depth H2, internal thread tooth top arrive middle line distance h 2, screw thread spigot surface angle θ, screw thread bearing surface angle γ at the bottom of middle line distance h 1, external screw thread tooth.
The specific embodiment
Referring to Fig. 1 ~ Fig. 2, a kind of button Special threading connector of leading fast that the utility model relates to, casing joint for taper pipe thread connection, it comprises inner thread piece 1 and external thread piece 3, on described inner thread piece 1, be processed with internal thread 2, on described external thread piece 3, be processed with external screw thread 4, internal thread 2 and external screw thread 4 are taper pipe thread, the tapering of taper pipe thread is 1:7.5, and tapering increases the upper performance of buckleing that is conducive to improve joint.When joint uses, internal thread 2 and external screw thread 4 intermesh, and produce interference, rise and connect and sealing function.
In general, the pitch of screw thread is larger, and ridge is thicker, is just more not easy thread alternating during upper button.The pitch of API screw thread is per inch 8 teeth or 5 teeth, and this screw thread is when pipe diameter is larger, and internal and external screw thread slightly deflection is just easy to thread alternating.The utility model, for this shortcoming, increases pitch, makes the easier make-up of joint.The pitch of the utility model internal thread 2 and external screw thread 4 is 8.467mm(3 tooth/25.4mm), to compare with common sleeve pipe (ordinary casing is 8 teeth/25.4mm or 5 teeth/25.4mm), this is a kind of coarse thread.
The shape of the utility model double thread is improved, θ=45～60 °, screw thread spigot surface angle, and button is easily recognized at mild spigot surface angle, in order to improve the bonding strength of joint, γ=3 °, bearing surface angle.Meanwhile, the tooth depth of internal thread 2 and external screw thread 4 is different, internal thread 2 tooth depth H1, H1=2.23mm, external screw thread 4 tooth depth H2, H2=2.15mm.Internal thread 2 middle lines are h1 to the distance of tooth top, and external screw thread 4 middle lines are h2 to the distance at the bottom of tooth, and h1=h2=1.05mm.After internal thread 2 and external screw thread 4 engagements, at the bottom of internal thread tooth, there is certain gap with external screw thread tooth top like this.At the bottom of the tooth top of internal thread 2 and external screw thread 4, tooth, be all parallel to screw thread bus.
In order to strengthen the sticking-resistant performance of joint, another measure that the utility model is taked is that inner thread piece 1 end changes into α angle, α=45～60 °, and external thread piece 3 ends change into β angle, and β=45～60 ° during joint make-up, easily enter button like this.
This kind of button Special threading connector of leading is fast named as: DL-VBM.
First embodiment of the design is the sleeve pipe for Ф 508.0 * 12.7 mm, and grade of steel is N80.The external diameter of external thread piece 3 is 508.0mm, wall thickness 12.7mm, and the external diameter of inner thread piece 1 is 533.4mm, length is not less than 270.0mm.Thread pitch is per inch 3 teeth, thread taper 1:7.5, and internal thread tooth depth 2.23, external screw thread tooth depth 2.15mm, thread forms is for partially trapezoidal, 60 °, its spigot surface angle, γ=3 °, bearing surface angle, thread engagement length 123mm.This joint tensile strength 12700kN, incompressible intensity is greater than tensile strength, on joint moment of torsion according to the rules, detain, at least can on unload 3 times and be not damaged.
Second embodiment of the design is the sleeve pipe for Ф 406.4 * 12.57 mm, and grade of steel is P110.The external diameter of external thread piece 3 is 406.4mm, wall thickness 12.57mm, and the external diameter of inner thread piece 1 is 431.8mm, length is not less than 270.0mm.Thread pitch is per inch 3 teeth, thread taper 1:7.5, and internal thread tooth depth 2.23, external screw thread tooth depth 2.15mm, thread forms is for partially trapezoidal, 60 °, its spigot surface angle, γ=3 °, bearing surface angle, thread engagement length 123mm.This joint tensile strength 11700kN, incompressible intensity is greater than tensile strength, on joint moment of torsion according to the rules, detain, at least can on unload 3 times and be not damaged.
Claims (4)
1. lead fast button Special threading connector for one kind, it comprises inner thread piece (1) and external thread piece (3), on described inner thread piece (1), be processed with internal thread (2), on described external thread piece (3), be processed with external screw thread (4), it is characterized in that internal thread (2) and external screw thread (4) are taper pipe thread, the tapering of taper pipe thread is 1:7.5, when joint uses, internal thread (2) and external screw thread (4) intermesh, and produce interference.
2. a kind of button Special threading connector of leading fast according to claim 1, is characterized in that the pitch of internal thread (2) and external screw thread (4) is 8.467mm.
3. a kind of button Special threading connector of leading fast according to claim 1, it is characterized in that θ=45～60 °, screw thread spigot surface angle, γ=3 °, bearing surface angle, internal thread (2) tooth depth H1, H1=2.23mm, external screw thread (4) tooth depth H2, H2=2.15mm, internal thread (2) middle line is h1 to the distance of tooth top, and external screw thread (4) middle line is h2 to the distance at the bottom of tooth, and h1=h2=1.05mm.
4. a kind of button Special threading connector of leading fast according to claim 1, is characterized in that inner thread piece (1) end changes into α angle, α=45～60 °, and external thread piece (3) end changes into β angle, β=45～60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625934.5U CN203531779U (en) | 2013-10-11 | 2013-10-11 | Quick guide buckle special screwed joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625934.5U CN203531779U (en) | 2013-10-11 | 2013-10-11 | Quick guide buckle special screwed joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531779U true CN203531779U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320625934.5U Expired - Fee Related CN203531779U (en) | 2013-10-11 | 2013-10-11 | Quick guide buckle special screwed joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545216A (en) * | 2015-10-27 | 2016-05-04 | 沧州瑞泰石油机械有限公司 | Special thread direct connection type large diameter oil pipe sleeve |
| CN114396235A (en) * | 2021-12-22 | 2022-04-26 | 上海海隆石油管材研究所 | Titanium alloy drill rod connecting structure with strip steel joints at two ends |
-
2013
- 2013-10-11 CN CN201320625934.5U patent/CN203531779U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545216A (en) * | 2015-10-27 | 2016-05-04 | 沧州瑞泰石油机械有限公司 | Special thread direct connection type large diameter oil pipe sleeve |
| CN114396235A (en) * | 2021-12-22 | 2022-04-26 | 上海海隆石油管材研究所 | Titanium alloy drill rod connecting structure with strip steel joints at two ends |
| CN114396235B (en) * | 2021-12-22 | 2024-05-24 | 上海海隆石油管材研究所 | Titanium alloy drill rod connecting structure with steel connectors at two ends |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20141011 |
|
| EXPY | Termination of patent right or utility model |