CN201723167U - Oil casing with tapered steps - Google Patents
Oil casing with tapered steps Download PDFInfo
- Publication number
- CN201723167U CN201723167U CN2010202352021U CN201020235202U CN201723167U CN 201723167 U CN201723167 U CN 201723167U CN 2010202352021 U CN2010202352021 U CN 2010202352021U CN 201020235202 U CN201020235202 U CN 201020235202U CN 201723167 U CN201723167 U CN 201723167U
- Authority
- CN
- China
- Prior art keywords
- casing
- screw thread
- tubing
- oil casing
- oil
- 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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- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to an oil casing with tapered steps. The oil casing comprises a casing body (1) and threads (4), wherein the threads (4) are processed on the outer side wall of the casing body (1); the oil casing is characterized in that the top of the casing body (1) is provided with a torque circular bead (2); and the torque circular bead (2) is provided with steps (3) which are in tapered structure. The oil casing with tapered steps has better sealing effect.
Description
(1) technical field
The utility model relates to a kind of tubing and casing, especially relates to a kind of tubing and casing that has type conical bench.
(2) background technology
The tubing and casing of oil field use at present adopts the API screw thread to connect mostly.The API screw thread because technology maturation, be easy to processing, advantage such as cost is lower, use more extensive always, but the API screw thread is owing to the reason of structure design aspect, there are many defectives that are difficult to overcome, as the low (round thread especially of bonding strength, bonding strength be body 60～80%), sealing performance is unreliable, go up difficult, the joint stress level height of button control, anticorrosion stress-resistant poor performance etc. are restricted the use of API screw thread.Because oil gas well drilling development of technology, drilling environment are harsh day by day, also higher to the requirement of tubing and casing, common API nipple oil, sleeve pipe can't satisfy instructions for use, and the demand of special thread oil, sleeve pipe will significantly increase.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of tubing and casing that has type conical bench with better sealing effectiveness is provided.
The purpose of this utility model is achieved in that a kind of tubing and casing that has type conical bench, include body and screw thread, described screw thread is machined on the lateral wall of body, and described body top is a torque shoulder, described torque shoulder place is provided with step, and described step is a pyramidal structure.
The beneficial effects of the utility model are:
During use, owing to be provided with the step sealing surface, only need tubing and casing is screwed in the box cupling that is complementary with it, utilize the metal/metal hermetically-sealed construction to realize sealing, make tubing and casing have higher sealing effectiveness, thereby no longer need to utilize screw thread to bear sealing function, provide space widely for optimizing helicitic texture.
(4) description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the I enlarged drawing of Fig. 1.
Fig. 3 is the utility model sectional side view.
Among the figure:
(5) specific embodiment
Referring to Fig. 1～3, the utility model relates to a kind of tubing and casing that has type conical bench, include body 1 and screw thread 4, described screw thread 4 is machined on the lateral wall of body 1, described body 1 top is a torque shoulder 2, and described torque shoulder 2 places are provided with step 3, and described step 3 is a pyramidal structure, described step 3 is a sealing surface, when connecting to its sealing function of tubing and casing.
Claims (1)
1. tubing and casing that has type conical bench, include body (1) and screw thread (4), described screw thread (4) is machined on the lateral wall of body (1), it is characterized in that: described body (1) top is a torque shoulder (2), described torque shoulder (2) locates to be provided with step (3), and described step (3) is a pyramidal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202352021U CN201723167U (en) | 2010-06-21 | 2010-06-21 | Oil casing with tapered steps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202352021U CN201723167U (en) | 2010-06-21 | 2010-06-21 | Oil casing with tapered steps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723167U true CN201723167U (en) | 2011-01-26 |
Family
ID=43491486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202352021U Expired - Fee Related CN201723167U (en) | 2010-06-21 | 2010-06-21 | Oil casing with tapered steps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723167U (en) |
-
2010
- 2010-06-21 CN CN2010202352021U patent/CN201723167U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20110621 |