Self-locking casing head

A casing head and self-locking technology, which is applied in wellbore/well components, sealing/isolation, earthwork drilling and production, etc., can solve the problems of easy loosening of tubing

Active Publication Date: 2021-06-22
京鸿石油钻采工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a self-locking casing head, which solves the problem that the oil pipe is prone to loosen in the related art

Method used

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Embodiment Construction

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all involve the protection scope of the present invention.

[0037] Such as Figure 1 to Figure 4 As shown, this example proposes

[0038] A self-locking casing head, comprising a casing head body 1, a hanger 2 and a sealing assembly 3, the casing head body 1 has a mounting hole 4, the hanger 2 is set in the mounting hole 4, and the sealing assembly 3 is set in the hanging Between the device 2 and the mounting hole 4, the casing head body 1 also has a mounting groove 5, the mounting groove 5 communicates with the mounting hole 4, an...

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Abstract

The invention relates to the technical field of petroleum drilling and production equipment, and provides a self-locking casing head. The self-locking casing head comprises a casing head body, wherein the casing head body is provided with a mounting hole; a hanger is arranged in the mounting hole; a sealing assembly is arranged between the hanger and the mounting hole; the casing head body is further provided with a mounting groove; the mounting groove communicates with the mounting hole; a plurality of clamping pieces are uniformly distributed at intervals in the circumferential direction of the mounting hole; the clamping pieces are provided with inverted teeth; the end of the hanger is provided with positive teeth; the inverted teeth are matched with the positive teeth; the clamping pieces are provided with vertical long-strip holes; a rotating shaft penetrates through the long-strip holes; reset elastic pieces are arranged on the clamping pieces; the upper ends of the clamping pieces are connected with the mounting groove through the reset elastic pieces; the lower ends of the clamping pieces abut against the inner wall of the bottom surface of the mounting groove; the bottom surface of a locking piece mounting groove is provided with a locking hole; a locking piece is arranged in the locking hole in a sliding mode in the vertical direction; and the clamping piece is jacked up after sliding. According to the technical scheme, the problem that an oil pipe is prone to loosening in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of oil drilling equipment, in particular to a self-locking casing head. Background technique [0002] The casing head is often used in the process of oil and natural gas exploitation. It is installed on the upper end of the surface casing string. It is used to fix the wellhead of the drilled well, connect the wellhead casing string, and support the connecting components of the technical casing and the reservoir casing. It can be used to seal the annular space between various layers of pipes, provide a transition connection for the installation of blowout preventers, tubing heads, and Christmas trees, and through the two side ports on the casing head body, it can perform mud squeeze, monitoring and filling balance Liquid and other construction work. [0003] At present, the more common oil and gas well casing head mainly includes the casing head body and the hanger arranged in the casing head body. The inne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
CPCE21B33/0422
Inventor 刘路平靳磊张延岭吴迪
Owner 京鸿石油钻采工程技术有限公司
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