CN201723176U - Oil casing with double-step tapered sealing surface - Google Patents

Oil casing with double-step tapered sealing surface Download PDF

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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
Application number
CN2010202331449U
Other languages
Chinese (zh)
Inventor
杨林
胡才望
黄淳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGYIN CHANGJIANG OIL SPECIAL PIPE MANUFACTURE CO Ltd
Original Assignee
JIANGYIN CHANGJIANG OIL SPECIAL PIPE MANUFACTURE CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JIANGYIN CHANGJIANG OIL SPECIAL PIPE MANUFACTURE CO Ltd filed Critical JIANGYIN CHANGJIANG OIL SPECIAL PIPE MANUFACTURE CO Ltd
Priority to CN2010202331449U priority Critical patent/CN201723176U/en
Application granted granted Critical
Publication of CN201723176U publication Critical patent/CN201723176U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • 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

The tubing and casing that has the double step conical seal (contact) face
(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:
Body 1, torque shoulder 2, one-level step 3, two stage steps 4, screw thread 5.
(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).
CN2010202331449U 2010-06-18 2010-06-18 Oil casing with double-step tapered sealing surface Expired - Fee Related CN201723176U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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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: 20110618