Suction anchor wellhead device suitable for oil and gas recovery in deep sea shallow multi-gas commingled production accident

A technology of wellhead device and suction anchor, which is applied in wellbore/well valve device, earthwork drilling, wellbore/well components, etc., to achieve the effect of reducing operation time, high matching and large optimization space

Pending Publication Date: 2022-07-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing suction anchor structure design tends to strengthen the bearing capacity and prevent the "soil plug"

Method used

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  • Suction anchor wellhead device suitable for oil and gas recovery in deep sea shallow multi-gas commingled production accident
  • Suction anchor wellhead device suitable for oil and gas recovery in deep sea shallow multi-gas commingled production accident
  • Suction anchor wellhead device suitable for oil and gas recovery in deep sea shallow multi-gas commingled production accident

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[0024] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become clearer.

[0025] In the present invention, it should be noted that, unless otherwise specified or limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "i...

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Abstract

The invention relates to the field of deep-sea shallow oil and gas drilling and production, in particular to a suction anchor wellhead device suitable for oil and gas recovery in deep-sea shallow multi-gas commingling production accidents. The well mouth comprises a suction anchor top cover, a well mouth body, an inner guide pipe, a suction anchor inner compartment bottom plate, a suction anchor outer cylinder, a collecting guide pipe, a one-way valve, reinforcing ribs and a supporting structure. The suction anchor top cover is provided with a circulation valve, a well mouth body, a hanging ring, a suction pump connector and a pressure gauge. The lower portion of the wellhead body is connected with the inner guide pipe, the suction anchor inner compartment bottom plate is located in the suction anchor, a center hole is formed in the center, and a circulation hole and a collection guide pipe are arranged on the upper portion. The lower part of the collecting conduit is connected with a matched one-way valve. The well mouth bearing capacity of the suction anchor is improved, the well body structure optimization space is large, oil and gas recovery treatment after shallow gas blowout, well kick and oil and gas leakage accidents possibly occurring in deep sea shallow drilling can be conducted, pollution of oil and gas leakage to the marine environment and the atmospheric environment is reduced, and environmental protection value is achieved.

Description

technical field [0001] The invention belongs to the field of deep-sea shallow oil and gas drilling and production, in particular to a suction anchor wellhead device suitable for oil and gas recovery in deep-sea shallow multi-gas commingled production accidents. Background technique [0002] As a new, efficient and clean energy carrier, natural gas hydrate plays a very important role in solving the crisis of energy depletion that mankind is currently facing. In view of the problems of low hydrate production and poor economic benefits, my country has put forward the "three-gas combined production" technology of hydrate, free gas and conventional natural gas, in order to make full use of the use value of mining equipment and reduce the economic cost of mining. "Three-gas commingled production" may be an effective way for human to realize the commercial development and utilization of natural gas hydrate in the early stage. However, the downhole environment is complex and change...

Claims

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Application Information

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IPC IPC(8): E21B33/035E21B34/04
CPCE21B33/035E21B34/04
Inventor 朱渊史嘉欣王梅超吴佳程旋孙慧琳王旭张宇宋小帅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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