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Washing device for riser of nautical oil-gas well

A technology for cleaning devices and risers, which is used in cleaning tools, flushing wells, wellbore/well components, etc., can solve the problems of easy "jamming, low work efficiency, etc., and achieves enhanced cleaning impact, compact structure, and solution The effect of inefficiency

Pending Publication Date: 2019-07-12
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a riser cleaning device for offshore oil and gas wells with a compact structure and ingenious design to solve the problem of low work efficiency caused by "jamming" existing in existing riser cleaning devices

Method used

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  • Washing device for riser of nautical oil-gas well
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  • Washing device for riser of nautical oil-gas well

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Embodiment Construction

[0027] The offshore oil and gas well riser cleaning device is composed of an upper joint 1, a lower joint 2, a central cylinder 3, a reciprocating valve 4, a starting valve 5 and a connecting sleeve 7 (see the appendix figure 1 ).

[0028] One end of the central tube 3 is threadedly connected with an upper joint 1 (see the attached figure 1 ); the upper joint 1 is cylindrical; the upper joint 1 is equipped with a start valve 5 through a return spring 14 (see the attached manual figure 1 ). The starting valve 5 can slide back and forth in the upper joint 1 when it is stressed.

[0029] The starting valve 5 is composed of a sealing piston 12, a sliding sealing ring 15 and a circulation barrel 13 (see the appended figure 1 ).

[0030] One end of the flow barrel 13 is threadedly connected with a sealing piston 12; the sealing piston 12 is in the shape of a tapered ring inside; the purpose of setting the sealing piston 12 in this way is to make the high-pressure drilling fluid ...

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Abstract

The invention relates to a washing device for a riser of a nautical oil-gas well and belongs to the technical field of riser washing equipment. The washing device for the riser is composed of upper joints, a lower joint, a center cylinder, a shuttle valve, a starting valve and a joint case. One end of the center cylinder are connected to the upper joint in a threaded mode and the lower joint headis insertedly connected to the other end of the center cylinder. A shuttle cavity is arranged in the center cylinder and a shuttle valveis movably installed in the shuttle cavity. The starting valve is movably installed in the upper joint at one side of the shuttle valve through restoring springs. Sealed holes are formed in the upper joints of two sides of the starting valve and sealed balls are movably installed in the sealed holes through sealed springs. According to the washing device for the riser, with the compact structure and artful design, the existing problem of low working efficiencycaused by being prone to jam fault in the washing device for the riser is solved. Washing impact is strengthened, the need of the washing device for the riser of nautical oil-gas well is suitably met, and the using requirements from people are satisfied.

Description

technical field [0001] The invention relates to a riser cleaning device for offshore oil and gas wells, belonging to the technical field of riser cleaning equipment. Background technique [0002] In the technical field of exploration and development of offshore oil and gas wells, risers are important equipment for offshore oil and gas wells. When the riser works in the marine environment, the mud and drilling fluid in the riser will solidify due to the cold seawater, which will easily cause the blockage of the drill pipe and the riser annulus. During the working process, it is necessary to regularly clean the inside of the riser through the cleaning device to meet the needs of offshore oil and gas production and use. However, the existing cleaning device cleans the inside of the riser by rotating the fixed scraper, but when this method is adopted, the existing scraper does not have a buffer function; therefore, when the attachment inside the riser When there are more, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/02E21B21/00
CPCE21B37/02E21B21/001
Inventor 夏成宇方永何宇航侯作富夏宏伟黄和祥
Owner YANGTZE UNIVERSITY
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