CN202645462U - Coupling - Google Patents
Coupling Download PDFInfo
- Publication number
- CN202645462U CN202645462U CN 201220245708 CN201220245708U CN202645462U CN 202645462 U CN202645462 U CN 202645462U CN 201220245708 CN201220245708 CN 201220245708 CN 201220245708 U CN201220245708 U CN 201220245708U CN 202645462 U CN202645462 U CN 202645462U
- Authority
- CN
- China
- Prior art keywords
- box cupling
- coupling
- screw threads
- sealing surface
- sealing
- 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
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- Earth Drilling (AREA)
Abstract
The utility model discloses a coupling. Taper internal screw threads are arranged at two ends of the coupling, sealing surfaces are arranged inside the tail ends of the internal screw threads, and grooves are arranged between the tail ends of the screw threads and the sealing faces along the circumference of the coupling. The grooves arranged between the tail ends of the screw threads and the sealing faces along the circumference of the coupling can be used to storage superfluous stop-leak compounds, enables the screw threads to withdraw tails better when the internal screws are machined and plays a role of a tool withdrawal groove, and therefore the sealing effect is better after an oil tube or a sleeving pipe is screwed with the coupling, and the performance is more stable.
Description
Technical field
The utility model relates to a kind of process components of oil exploration and development fields, the box cupling of especially a kind of petroleum casing pipe or oil pipe.
Background technology
Box cupling is a kind of of oil drilling instrument, and main is exactly that screw thread by the box cupling two ends is connected connection for the petroleum casing pipe of the usefulness of going into the well with oil pipe.This position is the weakest link of whole oil casing, so the quality of box cupling has conclusive impact to the use of final oil casing.The down-hole string of oil well is that box cupling and oil pipe or sleeve pipe are connected to form, and connected mode is that taper thread connects, and the existing connection function of connection sealing surface of taper thread has again sealing function.In box cupling, be coated with stop-leak compound during connection, if can have influence on switching performance when stop-leak compound is too much.When the internal thread of processing box cupling, there is one section to be incomplete screw thread during the last withdrawing of cutter, the screw thread tail end generally also has shoulder in addition, runs into easily shoulder when going out cutter.
The utility model content
The technical problems to be solved in the utility model provides a kind of defective that can avoid prior art, good sealing effect after stubborn connecing, the box cupling that switching performance is stable.
For addressing the above problem, a kind of box cupling of the present utility model, the box cupling two ends are provided with the tapering internal thread, are provided with sealing surface in the terminal inboard of internal thread, it is characterized in that: also be provided with between the end of described internal thread and the sealing surface along the circumferential groove of box cupling.
Described sealing surface is conical seal (contact) face.
Described groove is a plurality of.
Adopt the box cupling of the utility model structure, between screw-thread ending place and sealing surface, be provided with along the circumferential groove of box cupling, this groove can store unnecessary stop-leak compound, and can when machining internal thread, make better screw thread move back tail, play the effect of escape, thereby oil pipe or sleeve pipe and box cupling are twisted connect rear sealing effectiveness better, performance is more stable.
Description of drawings
Fig. 1 is the sectional view of the utility model box cupling.
Fig. 2 is the partial enlarged drawing of A section among Fig. 1.
The specific embodiment
In order to make those skilled in the art person understand better technical solutions of the utility model, the utility model is described in further detail below in conjunction with drawings and embodiments.
As shown in Figure 1, 2, box cupling 1 of the present utility model, be provided with tapering internal thread 101 at box cupling 1 two ends, be provided with sealing surface 102 in the terminal 101a inboard of internal thread 101, also be provided with between the terminal 101a of described internal thread and the sealing surface 102 along the circumferential groove 103 of box cupling 1.
Described groove 103 has one fixed width, can store unnecessary stop-leak compound, and described groove 103 can be one, also can be for a plurality of.
Described sealing surface 102 is conical seal (contact) face, also is provided with box cupling torque shoulder 104 in the end of sealing surface 102.
Adopt the box cupling 1 of the utility model structure, between the ending place of female ends 101a and sealing surface 102, be provided with along the circumferential groove 103 of box cupling, this groove 103 can store unnecessary stop-leak compound, and can when machining internal thread 101, make better screw thread move back tail, play the effect of escape, thereby oil pipe or sleeve pipe and box cupling 1 twisted connect rear sealing effectiveness better, performance is more stable.
Claims (3)
1. box cupling, the box cupling two ends are provided with the tapering internal thread, are provided with sealing surface in the terminal inboard of internal thread, it is characterized in that: also be provided with between the end of described internal thread and the sealing surface along the circumferential groove of box cupling.
2. box cupling as claimed in claim 1, it is characterized in that: described sealing surface is conical seal (contact) face.
3. box cupling as claimed in claim 1 or 2, it is characterized in that: described groove is a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245708 CN202645462U (en) | 2012-05-29 | 2012-05-29 | Coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245708 CN202645462U (en) | 2012-05-29 | 2012-05-29 | Coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645462U true CN202645462U (en) | 2013-01-02 |
Family
ID=47414584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220245708 Expired - Lifetime CN202645462U (en) | 2012-05-29 | 2012-05-29 | Coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645462U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909184A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Anti-galling drilling-tool thread joint |
| CN105909183A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Screwed joint of high-torsion-resistance drilling tool |
| CN106382099A (en) * | 2016-11-15 | 2017-02-08 | 东营威玛石油钻具有限公司 | Threaded connection structure of air sealing oil casing |
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
| CN106437552A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-sealing drill pipe joint |
-
2012
- 2012-05-29 CN CN 201220245708 patent/CN202645462U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909184A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Anti-galling drilling-tool thread joint |
| CN105909183A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Screwed joint of high-torsion-resistance drilling tool |
| CN106382099A (en) * | 2016-11-15 | 2017-02-08 | 东营威玛石油钻具有限公司 | Threaded connection structure of air sealing oil casing |
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
| CN106437552A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-sealing drill pipe joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |