Drilling fluid continuous circulation device and using method thereof

A technology of drilling fluid and circulation device, which is used in earth-moving drilling, flushing wellbore, wellbore/well components, etc. Effect

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

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Problems solved by technology

[0003] The present invention provides a drilling fluid continuous circulation device and its use method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the bottom hole pressure cannot be constantly controlled after the circulation of the existing continuous circulation drilling tool is stopped.

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  • Drilling fluid continuous circulation device and using method thereof
  • Drilling fluid continuous circulation device and using method thereof

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Embodiment Construction

[0016] The present invention is not limited by the following embodiments, and specific implementations can be determined according to the technical solutions and actual conditions of the present invention.

[0017] In the present invention, for ease of description, the description of the relative positional relationship of each component is based on the attached specification. figure 1 The layout method is described, such as: front, back, top, bottom, left, right, etc. The positional relationship is based on the instructions attached figure 1 The layout direction is determined.

[0018] The present invention will be further described below in conjunction with embodiments and drawings:

[0019] As attached figure 1 , 2 As shown, the drilling fluid continuous circulation device includes a main body 1, a plate-type float valve 2 and a side valve. The main body 1 is provided with an axial passage 3 that penetrates up and down. The axial passage 3 includes an upper straight hole and a lowe...

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Abstract

The invention relates to the technical field of well cementation and completion devices, in particular to a drilling fluid continuous circulation device and a using method thereof. The drilling fluidcontinuous circulation device comprises a body, a plate type float valve and a side valve; an axial channel which is through from top to bottom is arranged in the body and comprises an upper straighthole and a lower straight hole, and the inner diameter of the upper straight hole is larger than that of the lower straight hole; the plate type float valve capable of opening and closing the axial channel is arranged in the upper straight hole in a limiting manner; the plate type float valve can has a drilling condition and a connection making or tripping condition. According to the device, the structure is reasonable and compact, the use is convenient, the switching of fluid channels of drilling fluid under the drilling condition and the connection making or tripping condition is solved through the alternate opening and closing of the plate type float valve and the side valve, and the continuous circulation of the drilling fluid in a drill string is realized; and by arranging observationholes, the safety of fluid channel switching is improved, and the device has the characteristics of high efficiency, stability and safety.

Description

Technical field [0001] The invention relates to the technical field of cementing completion devices, and is a continuous circulation device for drilling fluid and a use method thereof. Background technique [0002] Continuous circulation drilling is an advanced drilling technology that uses a drilling fluid channel steering control device to maintain the continuous circulation of drilling fluid in the drill string during the connection of a single or vertical string, so as to achieve a stable equivalent cycle during drilling. Density and uninterrupted drill cuttings discharge avoid bottom hole pressure fluctuations caused by pump stop and pump start cycle, comprehensively improve wellbore conditions and drilling safety, greatly reduce drilling accidents, and increase the total ROP. Continuous circulation drilling technology can significantly improve drilling efficiency and provide strong power and technical support for drilling acceleration and oil and gas production. The existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/00E21B21/10E21B21/08
CPCE21B21/00E21B21/10E21B21/08
Inventor 廖新伟戴勇刘伟高晓辉姚延许李德华李海占杨方方
Owner BC P INC CHINA NAT PETROLEUM CORP
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