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Coiled tubing wellhead suspension sealing device

A sealing device and tubing technology, which is applied in the directions of sealing/isolation, wellbore/well components, earth-moving drilling, etc. Easy-to-use effects

Active Publication Date: 2020-11-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a coiled tubing wellhead suspension sealing device, which overcomes the deficiencies of the prior art above, and can effectively solve the problems of a small diameter of the suspension sealing device, a single-stage sealing structure, and a low pressure bearing load level.

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  • Coiled tubing wellhead suspension sealing device

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Embodiment Construction

[0014] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0015] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 The layout method is described, such as: the relationship between front, back, up, down, left, right and other positions is based on the attached figure 1 determined by the layout direction.

[0016] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0017] as attached figure 1 As shown, the coiled tubing wellhead suspension sealing device includes an upper sealing body 14, a suspension body 15 and a lower sealing body 16, the upper sealing body 14 is fixedly connected with the suspension body 15, an...

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Abstract

The invention relates to the technical field of coiled tubing fixing devices, in particular to a coiled tubing wellhead suspension sealing device. The coiled tubing wellhead suspension sealing devicecomprises an upper sealing body, a suspension body, a lower sealing body, a first jackscrew sealing device and a second jackscrew sealing device, the upper sealing body is fixedly in communication with the suspension body and the lower sealing body in sequence, the upper sealing body and the lower sealing body are the same in structure and are both of a left-right symmetrical structure, a boss isoutwards arranged in the middle of the right side of the upper sealing body, and a first mounting channel communicated with the inside and the outside is formed in the boss. The coiled tubing wellheadsuspension sealing device has the characteristics of being reasonable and compact in structure, convenient to use and large in drift diameter, and can meet the passing requirement of large-size tools; the coiled tubing wellhead suspension sealing device has the effects of double sealing and high pressure resistance so as to ensure well control safety during operation, and meanwhile, a suspensionbody structure with high-strength bearing load has the effects of prolonging the suspension service life of the coiled tubing wellhead suspension sealing device and preventing the coiled tubing from sliding into a well.

Description

technical field [0001] The invention relates to the technical field of coiled tubing fixing devices, and relates to a coiled tubing wellhead suspension sealing device. Background technique [0002] At present, for casing production wells with certain self-spraying ability but small flowback volume, the conventional drainage method is single, which cannot meet the oilfield safety, environmental protection, and high-efficiency exploration and development requirements. In recent years, major domestic oilfields have gradually developed coiled tubing. The pump drainage technology solves the problem of high-efficiency drainage in cased wells; the wellhead suspension sealing device is a key supporting tool in the coiled tubing pump drainage technology. The existing suspension sealing device has a small diameter, a single-stage sealing structure, and a low pressure and load-bearing load level. It cannot meet the sealing requirements of large-diameter tools running in and heavy-load ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
CPCE21B33/0422
Inventor 米红学陈超峰韦亮黄建平李轶江武杨硕孙国强刘陈翼
Owner BC P INC CHINA NAT PETROLEUM CORP
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