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Composite drive mandrel anchoring casing head

A casing head and anchoring technology, used in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problem of mandrel hanger and casing head body movement, seal failure, accidents, etc. The problem is to avoid the string movement, improve the sealing performance, and improve the sealing effect.

Pending Publication Date: 2019-05-10
DEZHOU UNITED GASOLINEEUM MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the use of the mandrel hanger, due to reasons such as cementing quality or casing damage, there will be pressure in the annular space, resulting in relative movement between the mandrel hanger and the casing head body, resulting in seal failure, and even ACCIDENT

Method used

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  • Composite drive mandrel anchoring casing head
  • Composite drive mandrel anchoring casing head
  • Composite drive mandrel anchoring casing head

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Embodiment Construction

[0046] The present invention will be explained and described in detail below in conjunction with the accompanying drawings.

[0047] refer to figure 1 As shown, a composite driving mandrel anchoring casing head includes a casing head housing 10 and an anchoring mandrel unit 20, and the anchoring mandrel unit 20 is set and sealed in the casing head housing 10 and is connected with the casing head housing 10. The casing 10 of the casing head is anchored, which can satisfy the suspension of the mandrel hanger, avoid the movement of the pipe string, and increase the stability and reliability of the casing head.

[0048] Generally speaking, a plurality of wellhead valves 50 and pressure measuring components 60 can be installed on the outside of the casing head housing 10 . The wellhead valve 50 may be, for example, a flat valve; the pressure measuring member 60 may be, for example, a pressure gauge.

[0049] refer to figure 2 , the casing head housing 10 has a vertically arrang...

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Abstract

The invention discloses a composite drive mandrel anchoring casing head and relates to the technical field of wellhead devices, the composite drive mandrel anchoring casing head comprises a casing head shell and an anchoring mandrel unit, a pressurizing hole is further formed in the side wall of the casing head shell, the first end of the pressurizing hole is connected with an anchoring hole part,and the second end of the pressurizing hole extends to the outer side of the casing head shell. The anchoring mandrel unit comprises an anchoring mandrel body, a slip exciting piece, an anchoring slip and an annular piston body, wherein the slip exciting piece, the anchoring slip and the annular piston body are sequentially arranged on the outer side of the anchoring mandrel body from top to bottom in a sleeving mode. The casing head can meet the hanging requirement of a mandrel hanger, after the anchoring mandrel body and the casing head shell are anchored, pipe column shifting can be avoided, and the stability and the reliability of the casing head are improved.

Description

technical field [0001] The invention relates to the technical field of wellhead devices, in particular to a composite driving mandrel anchoring casing head. Background technique [0002] During the use of the mandrel hanger, due to reasons such as cementing quality or casing damage, there will be pressure in the annular space, resulting in relative movement between the mandrel hanger and the casing head body, resulting in seal failure, and even ACCIDENT. [0003] How to design a casing head that can satisfy the suspension of the mandrel hanger while avoiding the movement of the pipe string and increase the stability and reliability of the casing head has become a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0004] Aiming at the above-mentioned technical problems existing in the prior art, the present invention provides a compound-driven mandrel anchoring casing head. The technical problem to be solved is that the casing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
Inventor 薛庆华李海庆于广海程贵华杨成永薛帅王宗雷宫兆玲侯祖刚
Owner DEZHOU UNITED GASOLINEEUM MACHINERY
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