Device and method for governing oil-water-well oil-string-casing channeling

A technology for oil-water wells and surface casings, which is used in earth-moving drilling, wellbore/well components, sealing/packaging, etc. The effect of firmness, elimination of safety hazards and simple structure

Active Publication Date: 2018-10-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the currently adopted method of controlling the casing run-up of oil and water wells generally has the problem of weak support and tension, and welding is required, which poses a safety hazard

Method used

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  • Device and method for governing oil-water-well oil-string-casing channeling
  • Device and method for governing oil-water-well oil-string-casing channeling

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Embodiment Construction

[0060] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0061] In the first aspect, the embodiment of the present invention provides a device for controlling the channeling of oil layer casing in oil and water wells, see figure 1 and figure 2 , the device includes: a jacking cylinder 1 , a jacking nut 2 , a base cylinder 3 and a tension member 4 .

[0062] Wherein, the jacking cylinder 1 is sheathed on the oil layer casing X2, the upper end of the jacking cylinder 1 is provided with a first flange 11 extending outward, and the outer wall of the jacking cylinder 1 is provided with external threads.

[0063] The jacking nut 2 is sleeved on...

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Abstract

The invention discloses a device and method for governing oil-water-well oil-string-casing channeling, and belongs to the technical field of oil extraction equipment. The device comprises a jacking cylinder, a jacking nut, a base cylinder and tension pieces; the jacking cylinder sleeves an oil-string casing, a first flange extending outwards is arranged at the upper end of the jacking cylinder, and an external thread is formed in the outer wall of the jacking cylinder; the jacking nut sleeves the jacking cylinder, and an internal thread matched with the external thread in the outer wall of thejacking cylinder is formed in the inner wall of the jacking nut; the base cylinder comprises a supporting section and a packing section which are sequentially connected from top to bottom; the packing section is located in annular space between a surface casing and the oil-string casing, clamping teeth capable of being clenched with the outer wall of the oil-string casing are arranged on the inner wall of the packing section, and the jacking cylinder can enter the supporting section; a second flange extending downwards is arranged at the connecting portion of the supporting section and the packing section; the first flange, the second flange and a surface casing head flange are fixed through the tension pieces; the first flange is also fixed to a large four-way lower flange.

Description

technical field [0001] The invention relates to the technical field of oil production equipment, in particular to a device and a method for controlling the upward channeling of oil layer casings in oil and water wells. Background technique [0002] The oil well casing mainly includes the surface casing and the oil layer casing located in the surface layer casing, and a large cross is connected to the upper end of the oil layer casing. The annular space between the surface casing and the oil layer casing is sealed off by an isolation device. During the production process of the oil-water well, due to the influence of the surface subsidence, the surface casing of the oil-water well sinks together with the surface, so that the oil layer casing moves upward relative to the surface casing. The upward movement of the oil layer casing will cause the isolation device that isolates the annular space between the surface layer casing and the oil layer casing to break away, making the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04E21B33/047
CPCE21B33/04E21B33/047
Inventor 李明李宪锋吴桂强李秉军任春燕黄欣雅崔立江谢立功
Owner PETROCHINA CO LTD
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