CN200971756Y - Anti-scoring coupling for oil pipe - Google Patents
Anti-scoring coupling for oil pipe Download PDFInfo
- Publication number
- CN200971756Y CN200971756Y CN 200620021833 CN200620021833U CN200971756Y CN 200971756 Y CN200971756 Y CN 200971756Y CN 200620021833 CN200620021833 CN 200620021833 CN 200620021833 U CN200620021833 U CN 200620021833U CN 200971756 Y CN200971756 Y CN 200971756Y
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- China
- Prior art keywords
- plane
- face
- coupling
- utility
- model
- 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 - Fee Related
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to an anti scratch oil pipe coupling for the connection of oil pipes. The utility model solves the problems existing oil pipe couplings that base gums frequently suffer from scratches or biting due to over small chamfer angles and further over quick damages of the base gums. The utility model is technically characterized in that a coupling end face (6) is connected in a transitional way with the circular arc plane of a column plane (7), a chamfer angle plane (3) is connected in a transitional way with the circular arc plane of the coupling end face (6), the chamfer angle plane (3) is also connected in a transitional way with the circular arc plane of the column plane (7), and the inclined angle between the chamfer angle plane (3) and the coupling end face (6) is 60 to 70 degrees. The utility model has the advantages of smooth passing from the base gum and small friction of the base gum.
Description
Technical field
The utility model relates to a kind of oil pipe fitting, especially anti-swipe tubing coupling.
Background technology
Tubing coupling in the past all is the long-pending approximate circle cylindrical shell of uniform section up and down, and has only a little chamfering between the coupling face and the face of cylinder, such structure is in underground work in the past, do not find its tangible weak point, yet, after a large amount of now use well heads seal controllers and widely popularize the Operating Pressure technology, its drawback just comes out, obviously be exactly when tubing coupling seals the packing unit of controller by well head, coupling face is too small easily with the scratch of glue core because of chamfering, " gnaw ", cause the too fast damage of scraping of glue core, make glue core and oil pipe body lose sealing function, do not reach the purpose of blowout prevention, both increased maintenance cost, increase labour intensity again, also influence production efficiency.
The utility model content
The purpose of this utility model is to provide a kind of anti-swipe tubing coupling, solves the deficiency of prior art, designs and produces into the big chamfering tubing coupling of circular arc at this problem, by using proof, can solve this technical problem.
Scheme of the present utility model has following technical characterstic: it comprises box cupling body, internal thread, internal thread through hole, it is characterized in that: coupling face 6 is connected for the arc surface transition with the face of cylinder 7.Fillet surface 3 is connected for the arc surface transition with coupling face 6, and fillet surface 3 also is connected for the arc surface transition with the face of cylinder 7.The scope of fillet surface 3 and coupling face 6 the two angle a is at 60 °-70 °.
The utility model is compared with prior art, has smooth and easy by the glue core, little to glue core wearing and tearing advantage.
Description of drawings
Fig. 1 is a half sectional view of the present utility model, and Fig. 2 is the partial enlarged drawing of Fig. 1, and Fig. 3 is the assembling schematic diagram, and Fig. 4 is the vertical view of Fig. 1.
The specific embodiment
An embodiment of the present utility model as shown in Figure 1, 2, the fillet surface 3 of box cupling body 1 is broadened among the figure, the starting point of inner end extends near the root of internal thread 4, intersect on the outer end and the face of cylinder 7, coupling face 6 is connected for the arc surface transition with fillet surface 3, and fillet surface 3 also is connected for the arc surface transition with the face of cylinder 7.The scope of fillet surface 3 and coupling face 6 the two angle a is at 60 °-70 °.The center of box cupling body 1 is an internal thread through hole 2, and as shown in Figure 4, internal thread through hole 2 is concentric chamber that are used to connect sucker rod 5.
Claims (3)
1, a kind of anti-swipe tubing coupling, it comprises box cupling body, internal thread, internal thread through hole, it is characterized in that: coupling face (6) is connected for the arc surface transition with the face of cylinder (7).
2, a kind of anti-swipe tubing coupling according to claim 1, it is characterized in that: fillet surface (3) is connected for the arc surface transition with coupling face (6), and fillet surface (3) also is connected for the arc surface transition with the face of cylinder (7).
3, a kind of anti-swipe tubing coupling according to claim 1 is characterized in that: the scope of fillet surface (3) and the two angle a of coupling face (6) is at 60 °-70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021833 CN200971756Y (en) | 2006-10-13 | 2006-10-13 | Anti-scoring coupling for oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021833 CN200971756Y (en) | 2006-10-13 | 2006-10-13 | Anti-scoring coupling for oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200971756Y true CN200971756Y (en) | 2007-11-07 |
Family
ID=38883012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620021833 Expired - Fee Related CN200971756Y (en) | 2006-10-13 | 2006-10-13 | Anti-scoring coupling for oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200971756Y (en) |
-
2006
- 2006-10-13 CN CN 200620021833 patent/CN200971756Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |