CN201723176U - Oil casing with double-step tapered sealing surface - Google Patents
Oil casing with double-step tapered sealing surface Download PDFInfo
- Publication number
- CN201723176U CN201723176U CN2010202331449U CN201020233144U CN201723176U CN 201723176 U CN201723176 U CN 201723176U CN 2010202331449 U CN2010202331449 U CN 2010202331449U CN 201020233144 U CN201020233144 U CN 201020233144U CN 201723176 U CN201723176 U CN 201723176U
- Authority
- CN
- China
- Prior art keywords
- double
- casing
- screw thread
- sealing surface
- tubing
- 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
Links
Images
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Earth Drilling (AREA)
Abstract
The utility model relates to an oil casing with double-step tapered sealing surface comprising a casing body (1) and threads (5), wherein the threads (5) are processed on the outer side wall of the casing body (1); the top of the casing body (1) is provided with a torque circular bead (2) which is provided with a one-stage step (3); the one-stage step (3) is in a tapered structure; and a two-stage step (4) is arranged between the one-stage step (3) and the threads (5). The oil casing with double-step tapered sealing surface 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 the double step conical seal (contact) face.
(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 the double step conical seal (contact) face with better sealing effectiveness is provided.
The purpose of this utility model is achieved in that a kind of tubing and casing that has the double step conical seal (contact) face, include body and screw thread, described screw thread is machined on the lateral wall of body, described body top is a torque shoulder, described torque shoulder place is provided with the one-level step, described one-level step is a pyramidal structure, is provided with two stage steps between described one-level step and the screw thread, and described one-level step and two stage steps are sealing surface.
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, be provided with the two-stage step simultaneously and carry out primary seal, 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 the double step conical seal (contact) face, include body 1 and screw thread 5, described screw thread 5 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 one-level step 3, and described one-level step 3 is a pyramidal structure, be provided with two stage steps 4 between described one-level step 3 and the screw thread 5, described one-level step 3 and two stage steps 4 are sealing surface.
Claims (1)
1. tubing and casing that has the double step conical seal (contact) face, include body (1) and screw thread (5), described screw thread (5) 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 one-level step (3), described one-level step (3) is a pyramidal structure, is provided with two stage steps (4) between described one-level step (3) and the screw thread (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202331449U CN201723176U (en) | 2010-06-18 | 2010-06-18 | Oil casing with double-step tapered sealing surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202331449U CN201723176U (en) | 2010-06-18 | 2010-06-18 | Oil casing with double-step tapered sealing surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723176U true CN201723176U (en) | 2011-01-26 |
Family
ID=43491495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202331449U Expired - Fee Related CN201723176U (en) | 2010-06-18 | 2010-06-18 | Oil casing with double-step tapered sealing surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604499A (en) * | 2014-11-19 | 2016-05-25 | 宝山钢铁股份有限公司 | A direct connection type double-step threaded joint |
-
2010
- 2010-06-18 CN CN2010202331449U patent/CN201723176U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604499A (en) * | 2014-11-19 | 2016-05-25 | 宝山钢铁股份有限公司 | A direct connection type double-step threaded joint |
| CN105604499B (en) * | 2014-11-19 | 2018-03-30 | 宝山钢铁股份有限公司 | A kind of direct linkage type double step nipple |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202380985U (en) | Tubular air seal thread joint | |
| CN203783486U (en) | Thread gluing prevention drill rod joint | |
| CN201723176U (en) | Oil casing with double-step tapered sealing surface | |
| CN201723165U (en) | Oil bushing with double-step spherical seal surface | |
| CN202081837U (en) | Stress-resistant threaded connector with corrosive gas sealing sleeve | |
| CN202090850U (en) | Pipeline connecting piece between thread and conical seal surface with limited circular bead | |
| CN201874485U (en) | Metal sealed casing threaded connecting structure based on API (American Petroleum Institute) standard round threads | |
| CN201502336U (en) | Special thread oil casing connector | |
| CN201723177U (en) | Oil bushing with double-step spherical seal surface and unequal spaced thread | |
| CN201723167U (en) | Oil casing with tapered steps | |
| CN203614052U (en) | Self-locking threaded joint | |
| CN201723168U (en) | Oil casing with double-step tapered sealing surface and unequally spaced threads | |
| CN201723178U (en) | Oil casing provided with spherical steps | |
| CN201705230U (en) | Special threading connector for sleeve with small external diameter | |
| CN203201491U (en) | Metal air-tight seal rotary bead type drill rod joint | |
| CN201723175U (en) | Oil sleeve with conical step sealing surface and unequally spaced threads | |
| CN204040938U (en) | A kind of Oil/gas Well thimble assembly | |
| CN201723166U (en) | Oil casing with spherical stepped sealing surface and unequally spaced threads | |
| CN202913978U (en) | Large caliber varying screw pitch quick screw-on sleeve pipe threaded connecting mechanism | |
| CN203531780U (en) | Highly-resistant double-circular-bead oil sleeve joint | |
| CN203403831U (en) | Direct-connecting oil casing pipe threaded connector | |
| CN201671558U (en) | Metal spherical sealing double-shoulder oil drill rod connector | |
| CN105298411A (en) | Sleeve joint structure | |
| CN204060547U (en) | A kind of Oil/gas Well integrated connection thimble assembly | |
| CN204082030U (en) | A kind of air sealed threaded sleeve joint |
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: 20110618 |