Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method

A technology for oil drilling and shorting, which is used in earth-moving drilling, flushing wellbore, wellbore/well components, etc., to prevent collapse and avoid collapse and leakage

Active Publication Date: 2011-10-26
深圳市远东石油钻采工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, prior art still needs to improve and develop

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  • Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method
  • Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method
  • Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method

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Embodiment Construction

[0024] The specific embodiments and examples of the present invention will be described in detail below in conjunction with the accompanying drawings. The described specific embodiments are only used to explain the present invention, and are not intended to limit the specific embodiments of the present invention.

[0025] A kind of uninterrupted circulation short circuit for oil drilling of the present invention, one of its specific implementation modes, such as figure 1 As shown, it includes an improved shorting body 100, an automatic central gate valve 200 and a lateral normally closed check valve 300; the inner cavity of the shorting body 100 is provided with a cavity and an inner card slot adapted to install the automatic central gate valve 200; The side wall of the shorting body 100 is provided with a cavity suitable for installing the lateral normally closed check valve 300; the automatic central gate valve 200 is coaxially arranged in the inner cavity of the shorting bod...

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Abstract

The invention discloses an uninterrupted circulating pup joint for petroleum well drilling and a continuous slurry circulation method, and the uninterrupted circulating pup joint comprises a pup joint body, an automatic central gate valve and a lateral normally-closed check valve, wherein the automatic central gate valve and the pup joint body are coaxially arranged; and the lateral normally-closed check valve is arranged on the side wall of the pup joint body below the automatic central gate valve. As the pup joint body structure with the combination of the large-drift diameter unobstructed automatic central gate valve and the triple lateral normally-closed single-flow valve is adopted, when a drill rod needs to be disassembled and assembled for making up, breaking out and pipe tripping, uninterrupted circulation of slurry is changed to be performed by the lateral normally-closed check valve, and pressure of the circulating slurry is utilized for automatically closing the automatic central gate valve above the lateral normally-closed check valve, thereby continuously maintaining the stability of the pressure of a borehole, effectively controlling the ECD (equivalent circulating density) value of annular space of the borehole, maintaining the stability of a well wall and the good effect of cleaning the borehole, preventing collapse and formation of a cuttings bed in the oblique well section and avoiding the collapse, clamping, leakage, blowout and other various complex situations.

Description

technical field [0001] The present invention relates to the field of supporting tools or devices of petroleum drilling equipment, and more specifically, the improvement relates to an uninterrupted circulation short circuit for petroleum drilling and its continuous circulation mud method. Background technique [0002] Oil drilling is known as the key to the oil industry, which also shows the key position of drilling in the oil industry. From the stage of exploration for oil and gas, to the stage of oil and gas development and production, to the implementation of the stage of increasing production of oil and gas fields, all must be realized by drilling. [0003] With the development and progress of oil and gas drilling technology, the petroleum industry has been able to drill various complex techniques on land, such as deep wells, ultra-deep wells, highly deviated wells, horizontal wells, extended-reach wells, and multi-bottom wells. Wells, and even in the ocean from shallow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/10E21B21/08
CPCE21B21/106
Inventor 贾银鸽连吉弘张武辇姜柯徐著华
Owner 深圳市远东石油钻采工程有限公司
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