CN2281413Y - Oil-well joint with pipe thread - Google Patents
Oil-well joint with pipe thread Download PDFInfo
- Publication number
- CN2281413Y CN2281413Y CN 96223034 CN96223034U CN2281413Y CN 2281413 Y CN2281413 Y CN 2281413Y CN 96223034 CN96223034 CN 96223034 CN 96223034 U CN96223034 U CN 96223034U CN 2281413 Y CN2281413 Y CN 2281413Y
- Authority
- CN
- China
- Prior art keywords
- face
- thread piece
- pipe
- interference
- piece
- 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 - Lifetime
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000007704 transition Effects 0.000 claims abstract description 4
- 210000002445 nipple Anatomy 0.000 claims description 10
- 230000004323 axial length Effects 0.000 claims description 4
- 239000011324 bead Substances 0.000 abstract 1
- 210000001503 joint Anatomy 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Abstract
The utility model discloses an oil-well pipe threaded joint, which relates to a tapered threaded joint. The front end of an external threaded piece is provided with a cylindrical sealing face (5) which is guided by an end arc-shaped chamfer (10). An internal threaded piece (2) is provided with a cylindrical hole sealing face (6) which is guided by an arc-shaped transition face (11) out of the internal side threads. The two sealing faces (5) and (6) are in interference fit to form a main sealing part (4). The pipe end face of the external threaded piece (1) is composed of a convex arc-shaped face (9) with a curvature radius R=8-150 mm. The convex arc-shaped face (9) abuts on the lateral plane face of a circular bead (7) on the bottom of the internal threaded piece to form a secondary sealing part. When the threaded joint is axially drawn, the surface pressure of the main sealing part stays constantly, and the secondary sealing part can still keep definite surface pressure. The threaded joint has a good sealing effect.
Description
The utility model relates to a kind of oil well pipe thread joint, is a kind of tapered thread joint that is suitable for oil gas well, thick oil thermal extraction use.
BP GB2160609 discloses a kind of oil well pipe thread joint, is made up of external thread piece and inner thread piece two parts.Interference fit forms the primary seal part between radially dome arc sealing surface on the anterior optical axis of external thread piece pipe end and the circular cone sealing surface beyond the inner thread piece inner face screw thread.External thread piece pipe end plane and the butt joint of inner thread piece bottom shoulder side plane form secondary hermetic unit.Primary seal part is used to adjust screw thread magnitude of interference Δ d and primary seal part face at the magnitude of interference Δ D that sealing has and presses size between the P.Purpose is to prevent to produce stress corrosion cracking (SCC) by the circumferential stress that suppresses inner thread piece, and good intensity and sealing is provided.Existing problem is: its primary seal part is matched with taper seat by convex arc surface radially and constitutes, when being subjected to axial tension, primary seal part face drops, influence sealing performance, secondary hermetic unit is made of the butt joint of two pipe end planes, when being subjected to axial tension, the face drops is rapid, influences sealing performance equally.And axial tension is the main load of bearing under the oil well pipe duty
The purpose of this utility model provides a kind of oil well pipe thread joint with excellent sealing ability.
The purpose of this utility model is to realize like this.
A kind of oil well pipe thread joint, be the tapered thread joint, form by external thread piece and inner thread piece, threaded portion has magnitude of interference Δ d, form of thread is for trapezoidal partially, the external thread piece front end has column sealed by the guiding of end circular arc chamfering, cylindrical hole sealing surface by the guiding of arc transition face is arranged beyond the inner thread piece inner face screw thread, two sealing surface interference fit constitute the primary seal part, the axial length Δ L=0.15-3mm of its interference fit contact surface, magnitude of interference Δ D is controlled at the face that primary seal is partly formed and presses P to satisfy relational expression: interior pressure＜P that nipple bears＜nipple YIELD STRENGTH, relation between magnitude of interference Δ D and the screw thread magnitude of interference Δ d is: Δ D＞Δ d, external thread piece pipe end face is the convex arc surface of radius of curvature R=8-150mm, and convex arc surface constitutes secondary hermetic unit near inner thread piece bottom shoulder side plane.
External thread piece pipe end face is the convex arc surface of radius of curvature R=10-50mm.
Load-side angle [alpha]=the 0-3 of its buttress thread tooth form of threaded portion °, guiding side angle beta=10 °-45 °.
External thread piece is an end of a pipe, and inner thread piece can be the end of another pipe, also can be an end of pipe box cupling.
Advantage that the utility model is compared with prior art had foot: the primary seal part cooperates with the cylindrical hole sealing surface by column sealed and constitutes, and the interference fit contact surface has certain axial length, it is constant to keep primary seal part face to press when being subjected to axial tension, simultaneously, secondary hermetic unit is docked with the plane by the pipe end convex arc surface and constitutes, the face pressure drop is hanged down slowly when being subjected to axial tension, still can keep certain face and press, thereby this nipple has excellent sealing ability.
Introduce embodiment of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is the structure chart of the utility model oil well pipe thread joint.
Fig. 2 is the A portion zoomed-in view of Fig. 1.
Fig. 3 is the B portion zoomed-in view of Fig. 1.
As shown in Figure 1, the utility model oil well pipe thread joint is the tapered thread joint, is made up of external thread piece 1 and inner thread piece 2, and external thread piece 1 is an end of a pipe, and inner thread piece 2 is ends of a pipe box cupling.Threaded portion 3 has magnitude of interference Δ d=0.03mm, and form of thread is for trapezoidal partially, as shown in Figure 3, and its load-side angle [alpha]=3 °, guiding side angle beta=30 °, screw thread tooth depth h=0.8mm.Shown in Figure 2, external thread piece 1 front end has column sealed 5 by 10 guiding of end circular arc chamfering, cylindrical hole sealing surface 6 by 11 guiding of arc transition face is arranged beyond the inner thread piece 2 inner face screw threads, two sealing surfaces, 5,6 interference fit constitute primary seal part 4, the axial length Δ L=0.25mm of its interference fit contact surface.Column sealed 5 external diameter is D
1, the internal diameter of cylindrical hole sealing surface 6 is D
2, D
1＞D
2Make primary seal part 4 have magnitude of interference Δ D, the face that forms the primary seal part is pressed P, magnitude of interference Δ D should be controlled at and make primary seal part face press P to satisfy relational expression: interior pressure＜P that nipple bears＜nipple YIELD STRENGTH, and the relation between the magnitude of interference Δ D of primary seal part 4 and the screw thread magnitude of interference Δ d is: Δ D＞Δ d.External thread piece 1 pipe end face is the convex arc surface 9 of radius of curvature R=12mm, and convex arc surface 9 constitutes secondary hermetic unit 8 near inner thread piece 2 bottom shoulders 7 side planes.
The utility model oil well pipe thread joint, when being subjected to axial tension, the face of primary seal part 4 is pressed and is remained unchanged in running order, and secondary hermetic unit 8 still can be kept certain face and press, and has good sealing effectiveness.
The utility model oil well pipe thread joint can be used as the joint that external diameter is all oil well pipes of 60.3～339.7mm.
Claims (4)
1. oil well pipe thread joint, be the tapered thread joint, form by external thread piece and inner thread piece, threaded portion has magnitude of interference Δ d, form of thread is for trapezoidal partially, it is characterized in that: external thread piece (1) front end has column sealed (5) by end circular arc chamfering (10) guiding, cylindrical hole sealing surface (6) by arc transition face (11) guiding is arranged beyond inner thread piece (2) the inner face screw thread, two sealing surfaces (5), (6) interference fit constitutes primary seal part (4), the axial length Δ L=0.15-3mm of its interference fit contact surface, magnitude of interference Δ D is controlled at the face that primary seal is partly formed and presses P to satisfy relational expression: interior pressure＜P that nipple bears＜nipple YIELD STRENGTH, relation between magnitude of interference Δ D and the screw thread magnitude of interference Δ d is: Δ D＞Δ d, external thread piece (1) pipe end face is the convex arc surface (9) of radius of curvature R=8-150mm, and convex arc surface (9) constitutes secondary hermetic unit (8) near inner thread piece 2 bottom shoulder (7) side planes.
2. nipple according to claim 1 is characterized in that: described external thread piece (1) pipe end face is the convex arc surface (9) of radius of curvature R=10-50mm.
3. nipple according to claim 1 is characterized in that: described threaded portion (3), the load-side angle [alpha]=0-3 of its buttress thread tooth form °, guiding side angle beta=10 °-45 °.
4. nipple according to claim 1 is characterized in that: described external thread piece (1) is an end of a pipe, and inner thread piece (2) can be an end of another pipe, also can be an end of pipe box cupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223034 CN2281413Y (en) | 1996-09-25 | 1996-09-25 | Oil-well joint with pipe thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223034 CN2281413Y (en) | 1996-09-25 | 1996-09-25 | Oil-well joint with pipe thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2281413Y true CN2281413Y (en) | 1998-05-13 |
Family
ID=33902428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96223034 Expired - Lifetime CN2281413Y (en) | 1996-09-25 | 1996-09-25 | Oil-well joint with pipe thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2281413Y (en) |
-
1996
- 1996-09-25 CN CN 96223034 patent/CN2281413Y/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101881139B (en) | Thread connector of petroleum gas industrial tube | |
| CN201318513Y (en) | Oil pipe high-pressure gas seal connection structure | |
| US2463883A (en) | Tube coupling | |
| ITMI980426A1 (en) | COMMON CONDUCT AND MANUFACTURING PROCEDURE OF ITSELF | |
| CN101864908A (en) | Threaded connector for pipes | |
| CN2281413Y (en) | Oil-well joint with pipe thread | |
| CN110939806B (en) | Low-temperature-resistant rubber combined joint | |
| CN212509888U (en) | Taper sleeve locking type pipe fitting | |
| CN2278762Y (en) | Threaded joint for oil well pipe | |
| CN2278761Y (en) | Threaded joint for oil well pipe | |
| CN108506607B (en) | Cutting sleeve type pipe joint | |
| CN2276068Y (en) | Nipple for oil well pipe | |
| CN206377366U (en) | A kind of oil connection | |
| CN211173978U (en) | Threaded joint with sealing ring and oil well pipe column | |
| CN210685918U (en) | Jackscrew component for casing head | |
| CN209849718U (en) | Special necking-prevention punch for cold expanding of pipeline pipe | |
| CN107191700A (en) | Oil connection | |
| CN2248815Y (en) | Sealing screw-threaded joint for petroleum collar | |
| CN215950094U (en) | Self-sealing embedded thread sleeve assembly | |
| CN201738836U (en) | Threading connector for pipes | |
| CN211058735U (en) | Novel oil field oil production pipe column | |
| CN215000045U (en) | Non-welding elastic sealing pipe joint | |
| CN217927431U (en) | Valve stem nut with quick connection structure | |
| CN211397489U (en) | High-strength buckle-changing quick drilling tool joint | |
| CN2665344Y (en) | Torque resistant oil pipe screwed socket joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD |
|
| CP03 | Change of name, title or address |
Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: Baoshan Iron & Steel Co., Ltd. Address before: 201900 No. 1, middle front road, Baoshan District Shanghai factory Patentee before: Baoshan Iron & Steel (Group) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |