CN2504380Y - Sleeving nipple - Google Patents
Sleeving nipple Download PDFInfo
- Publication number
- CN2504380Y CN2504380Y CN 01253367 CN01253367U CN2504380Y CN 2504380 Y CN2504380 Y CN 2504380Y CN 01253367 CN01253367 CN 01253367 CN 01253367 U CN01253367 U CN 01253367U CN 2504380 Y CN2504380 Y CN 2504380Y
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- CN
- China
- Prior art keywords
- thread piece
- sealing surface
- cylinder
- seal
- external thread
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- Expired - Lifetime
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a threaded joint of a sleeve, an the threaded joint of a sleeve mainly solves the problem which the seal performance of the primary seal is affected when the contact pressure is reduced under the axial tension, wherein, the primary seal adopts the seal surface of a circular cone curved surface or matches the seal surface of a circular cone curved surface. The utility model includes an external thread piece (11) and an internal thread piece (21). An arc seal surface (14) is arranged at the metal primary seal of the end of the external thread piece (11). Cylinder seal surfaces (12, 13) are interference fitted with the arc seal surface (23) on the end of the internal thread piece (21) and the surfaces of the cylinder seal surfaces (22, 24) forming the structure of the primary seal surface. The torque shoulder surface (15) on the end of the external thread piece (11) matches with the torque shoulder surface (12) on the end of the internal thread piece (21) forming an auxiliary seal surface structure. The primary seal of the threaded joint is of cylinder-to-cylinder structure, and therefore still remains an excellent seal performance when the contact pressure is reduced under the axial tension, moreover, the machine work and dimension measurement are very convenient.
Description
Technical field
The utility model relates to a kind of oil well casing nipple.
Background technology
Sleeve pipe high-quality nipple is the very high product of a kind of requirement on machining accuracy.Along with the development of oil gas well drilling, also more and more higher to the requirement of sleeve pipe high-quality nipple.United States Patent (USP) U.S.Patent 6045165 discloses a kind of screw coupling for oil well pipe.This nipple is made up of inner thread piece and external thread piece two parts.There is a shape metallic leak-proof structure male-pipe end, with the shape metallic leak-proof structure of inner thread piece thread root, forms the master metal sealing by interference fit.The male end of a pipe shape metallic leak-proof structure is conical surface sealing surface or deep camber circular arc camber sealing surface, and internal thread root shape metallic leak-proof structure is the conical surface sealing surface.Simultaneously, the reverse shoulder of male-pipe end face docks the torque shoulder that forms control torque with the reverse shoulder of internal thread root, and the effect of auxiliary seal is arranged.
This patent as long as externally threaded hermetically-sealed construction is put into internal threaded end, is put into the external screw thread root to the hermetically-sealed construction of internal thread for the situation of external seal, has just formed the outer seal configuration of joint.
The problem that this technology exists is: 1. because primary seal adopts conical surface sealing surface or the deep camber circular arc camber sealing surface formation that matches with the conical surface sealing surface, when being subjected to axial tension, the primary sealing area contact pressure reduces, influence sealing performance, and axial force is the sleeve pipe main load in when work.2. external screw thread adopts conical surface sealing surface or deep camber circular arc camber sealing surface, and difficulty of processing is big.Internal thread adopts circular cone curvature sealing surface, and not only difficulty of processing is big, and dimension survey is very difficult.
Summary of the invention
The purpose of this utility model is to provide that a kind of sealing performance is good, handling ease, measure casing thread connection easily.
For achieving the above object, solution of the present utility model be primary seal adopt cylinder to cylinder, sphere to cylinder, solved because casing wt is big, when being subjected to axial tension, reduce the primary sealing area contact pressure; Reverse shoulder mainly plays two effects, control torque wrench moment and auxiliary seal.Because before reverse shoulder contact, primary seal contacts, metallic seal place occurs bending and deformation, thereby causes reverse circular bead surface contact pressure inhomogeneous, has reduced the auxiliary seal function., when the reverse shoulder angle of design torque cooperates scope, be not both at the size of considering the primary seal magnitude of interference and the wall thickness at metallic seal position for this reason, determine the value of the reverse shoulder angle of moment of torsion with prior art.
The utility model comprises external thread piece, inner thread piece, and external thread piece is an end of body, and inner thread piece is an end of box cupling, and there is a torque shoulder face at described external thread piece end master metal sealing position; There is the torque shoulder face at master metal sealing position, described inner thread piece end, and the torque shoulder face cooperates formation auxiliary seal face structure with the torque shoulder face;
There is the circular arc sealing surface and the cylinder sealing surface of a radius R 1 at master metal sealing position, described external thread piece end; There is the circular arc sealing surface and the cylinder sealing surface of a radius R 2 at master metal sealing position, described inner thread piece end; The circular arc sealing surface of the circular arc sealing surface of this external thread piece end and cylinder sealing surface and inner thread piece end and cylinder sealing surface interference fit form the primary sealing area structure, be cylinder to cylinder, this external thread piece end cylinder sealing surface and inner thread piece end cylinder sealing surface; Sphere is to cylinder, cylinder sealing surface and circular arc sealing surface and circular arc sealing surface and cylinder sealing surface surface; The external diameter of external thread piece sealing surface is D1, and inner thread piece sealing surface external diameter is D2, D1＞D2, and cooperatively interacting makes the cylinder primary seal have magnitude of interference Δ D=D1-D2 on diametric(al).
Described external thread piece end cylinder sealing surface contacts length of fit L=0.15～0.35mm with inner thread piece end cylinder sealing surface.
Described external thread piece end master metal sealing circle of position arc radius R 1＞15mm; Described inner thread piece end master metal sealing circle of position arc radius R 2＞25mm.
The magnitude of interference range delta D=D1-D2=0.12～0.28mm of the external diameter of described external thread piece sealing surface and inner thread piece sealing surface outer diameter D 2.
1=0.5 °～1 ° of the span Δ θ of the reverse shoulder angle θ 1 of described external thread piece end and the reverse shoulder angle θ 2 of inner thread piece end=θ 2-θ.
Described helicitic texture is the buttress thread button-type, load-side angle [alpha]=0 of this button-type form of thread °～3 °, guiding side angle beta=10 °～45 °.
Because primary seal employing cylinder of the present utility model to cylinder, has solved when being subjected to axial tension the problem that the primary sealing area contact pressure reduces to cylinder, sphere.Machine simultaneously, dimension survey are all very convenient.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation at the utility model master metal sealing position.
Fig. 3 is the structural representation of the reverse shoulder angle of the utility model metal inner and outer screw element end.
Fig. 4 is the structural representation at the utility model casing joint helicitic texture position.Among the figure: 11-external thread piece
12, the circular arc sealing surface of the cylinder sealing surface 14-external thread piece of 13-external thread piece
The threaded portion of the torque shoulder face 18-external thread piece of 15-external thread piece
21-inner thread piece
22, the circular arc sealing surface of the cylinder sealing surface 23-inner thread piece of 24-inner thread piece
The threaded portion of the torque shoulder face 28-inner thread piece of 25-inner thread piece
The specific embodiment
As shown in Figure 1, the utility model joint is the tapered thread joint, is made up of external thread piece 11 and inner thread piece 21, and external thread piece 11 is ends of body, and inner thread piece 21 is ends of box cupling.
As Fig. 2, shown in Figure 3, external thread piece 11 end master metal seal the position, the circular arc sealing surface 14 of a radius R 1=25mm are arranged, cylinder sealing surface 12,13, torque shoulder face 15; Inner thread piece 21 end master metal seal the position, the circular arc sealing surface 23 of a radius R 2=35mm are arranged, cylinder sealing surface 22,24, torque shoulder face 25; The external diameter of sealing surface 12,13 is D1, the external diameter of sealing surface 22,24 is D2, D1＞D2, cooperatively interact and make the cylinder primary seal on diametric(al), have magnitude of interference Δ D=D1-D2=0.22mm, form primary seal contact pressure P, P satisfies relational expression: nipple bears interior pressure＜P＜nipple YIELD STRENGTH.External thread piece 11 end cylinder sealing surfaces 12 contact length of fit L=0.25mm with inner thread piece 21 end cylinder sealing surfaces 22; Sealing surface 13 and 23,14 and 24 changes along with the variation of circular arc sealing surface 14 and circular arc sealing surface 23.1=14.5 ° of the reverse torque shoulder face of joint θ, is construed as limiting the effect of moment of torsion and auxiliary seal by θ 2=15 °.
The casing joint helicitic texture is seen Fig. 4, consider processing cost, in design, selected standard A PI buttress thread button-type, the threaded portion 18 of external thread piece 11 and the threaded portion 28 of inner thread piece 21 have magnitude of interference Δ d=0.225mm, load-side angle [alpha]=3 of buttress thread °, guiding side angle beta=10 °, screw thread tooth depth h=1.575mm, pitch p=5.08mm, tapering T=0.0625.
Claims (6)
1. casing thread connection, comprise external thread piece (11), inner thread piece (21), external thread piece (11) is an end of body, and inner thread piece (21) is an end of box cupling, and there is a torque shoulder face (15) at described external thread piece (11) end master metal sealing position; There is torque shoulder face (25) at master metal sealing position, described inner thread piece (21) end, and torque shoulder face (15) cooperates formation auxiliary seal face structure with torque shoulder face (25); It is characterized in that: there are the circular arc sealing surface (14) of a radius R 1 and cylinder sealing surface (12), (13) in described external thread piece (11) end master metal sealing position; There are the circular arc sealing surface (23) of a radius R 2 and cylinder sealing surface (22), (24) in described inner thread piece (21) end master metal sealing position; This external thread piece (11) end cylinder sealing surface (12) forms primary sealing area structure to circular arc sealing surface (23) and circular arc sealing surface (14) to cylinder sealing surface (24) interference fit to inner thread piece (21) end cylinder sealing surface (22), cylinder sealing surface (13).
2. casing thread connection as claimed in claim 1 is characterized in that: described external thread piece (11) end cylinder sealing surface (12) contacts length of fit L=0.15～0.35mm with inner thread piece (21) end cylinder sealing surface (22).
3. casing thread connection as claimed in claim 1 or 2 is characterized in that: described external thread piece (11) end master metal sealing circle of position arc radius R 1＞15mm; Described inner thread piece (21) end master metal sealing circle of position arc radius R 2＞25mm.
4. casing thread connection as claimed in claim 1 or 2 is characterized in that: the magnitude of interference range delta D=D1-D2=0.12～0.28mm of the outer diameter D 1 of described sealing surface (12,13) and sealing surface (22,24) outer diameter D 2.
5. casing thread connection as claimed in claim 1 is characterized in that: 1=0.5 °～1 ° of the span Δ θ of the reverse shoulder angle θ 1 of described external thread piece (11) end and the reverse shoulder angle θ 2 of inner thread piece (21) end=θ 2-θ.
6. casing thread connection as claimed in claim 1 is characterized in that: described helicitic texture is the buttress thread button-type, load-side angle [alpha]=0 of this button-type form of thread °～3 °, guiding side angle beta=10 °～45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253367 CN2504380Y (en) | 2001-08-29 | 2001-08-29 | Sleeving nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253367 CN2504380Y (en) | 2001-08-29 | 2001-08-29 | Sleeving nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2504380Y true CN2504380Y (en) | 2002-08-07 |
Family
ID=33662873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01253367 Expired - Lifetime CN2504380Y (en) | 2001-08-29 | 2001-08-29 | Sleeving nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2504380Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296649C (en) * | 2002-11-27 | 2007-01-24 | Hsc公司 | Improved sleeve Joint |
| CN102071881A (en) * | 2010-12-08 | 2011-05-25 | 中国石油集团石油管工程技术研究院 | Hermetic threaded joint of sleeve for gas well |
| CN102242608A (en) * | 2011-07-15 | 2011-11-16 | 上海大学 | Double-shoulder tri-conicity threading connector for high-temperature high-pressure petroleum casing pipe |
| CN102996079A (en) * | 2011-09-16 | 2013-03-27 | 中国石油化工股份有限公司 | Tubular air sealing screwed joint and application thereof |
| CN103527107A (en) * | 2013-10-12 | 2014-01-22 | 建湖县永维阀门钻件有限公司 | Bidirectional self-locking type single-start thread marine riser connector |
| CN104632097A (en) * | 2013-11-12 | 2015-05-20 | 天津德华石油装备制造有限公司 | Special buttress thread oil casing pipe connecting joint |
-
2001
- 2001-08-29 CN CN 01253367 patent/CN2504380Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296649C (en) * | 2002-11-27 | 2007-01-24 | Hsc公司 | Improved sleeve Joint |
| CN102071881A (en) * | 2010-12-08 | 2011-05-25 | 中国石油集团石油管工程技术研究院 | Hermetic threaded joint of sleeve for gas well |
| CN102242608A (en) * | 2011-07-15 | 2011-11-16 | 上海大学 | Double-shoulder tri-conicity threading connector for high-temperature high-pressure petroleum casing pipe |
| CN102996079A (en) * | 2011-09-16 | 2013-03-27 | 中国石油化工股份有限公司 | Tubular air sealing screwed joint and application thereof |
| CN103527107A (en) * | 2013-10-12 | 2014-01-22 | 建湖县永维阀门钻件有限公司 | Bidirectional self-locking type single-start thread marine riser connector |
| CN104632097A (en) * | 2013-11-12 | 2015-05-20 | 天津德华石油装备制造有限公司 | Special buttress thread oil casing pipe connecting joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110829 Granted publication date: 20020807 |