Center hole sealing and locking apparatus for tubing hanger of underwater horizontal Christmas tree

A technology of locking device and central hole, which is applied in the directions of sealing/isolation, earthwork drilling, wellbore/well parts, etc., which can solve the problem that the sealing effect cannot be effectively guaranteed, non-metallic seals are worn, and the success rate of one-time sealing is low and other issues, to reduce the risk of tripping, long seal life, save time and cost of underwater operations

Inactive Publication Date: 2015-10-21
MEIZUAN ENERGY TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above traditional methods, the sealing effect cannot be effectively guaranteed, and the success rate of one-time sealing is low
The threaded rotary fixing method will also cause wear to the non-metallic seal during the installation process, and the installation time is longer. In addition, the seal will be corroded by the medium liquid, which will affect the service life.

Method used

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  • Center hole sealing and locking apparatus for tubing hanger of underwater horizontal Christmas tree

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Embodiment Construction

[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0025] Secondly, the present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the sectional view showing the structure of the device will not be partially enlarged according to the gene...

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Abstract

The invention provides a center hole sealing and locking apparatus for a tubing hanger of an underwater horizontal Christmas tree. The apparatus comprises an apparatus body internally provided with an apparatus body inner ring. A motivating ring is arranged in the apparatus body inner ring, a limit ring is arranged at the top potion of the apparatus body, and the limit ring can prevent the motivating ring from getting out of the apparatus body inner ring. The middle upper portion of the apparatus body is circumferentially and uniformly provided with multiple rectangular through holes, and each rectangular through hole is provided with a clamping tooth. The outer ring of the motivating ring is in contact with the inner walls of the clamping teeth in a matching manner. The motivating ring drives the clamping teeth to expand outwardly when the motivating ring moves downwardly. The motivating ring matches the clamping teeth and performs self-locking when the motivating ring downwardly moves to the bottom. The sealing and locking apparatus is simple in structure. By employing the apparatus, the difficulty of underwater operation is reduced, the time and cost for the underwater operation are saved, the time for installation and delivery operation is shortened, a replacing process for sealing members is simplified, the sealing success rate by one time is improved, and better sealing effects are achieved.

Description

technical field [0001] The invention relates to a sealing and locking device, in particular to a sealing and locking device for a center hole of a christmas tree oil pipe hanger. Background technique [0002] During the underwater oil development of the subsea tree, the tubing hanger of the Christmas tree is located inside the tree body, and the center hole of the tubing hanger at the upper part of the production channel of the tubing hanger needs to be completely plugged and sealed. [0003] At present, the method of blocking, locking and sealing the central hole of the oil pipe hanger is usually screwed and fixed, and sealed with a non-metallic part. Using the above traditional methods, the sealing effect cannot be effectively guaranteed, and the success rate of one-time sealing is low. The threaded rotary fixing method will also cause wear to the non-metallic seal during the installation process, and the installation time is long. In addition, the seal will be corroded b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/043
Inventor 张鹏举李博施佳齐效文黄河汪伟俊涂再君许淑峰汤有兵梁斌
Owner MEIZUAN ENERGY TECH SHANGHAI
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