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A bypass valve for drilling tools

A bypass valve and drilling tool technology, applied in the field of oil and gas drilling, can solve the problems of inability to close bypass holes, need to arrange breathing holes, and increase downhole risks, so as to facilitate safe production, improve reliability and safety, and improve drilling. The effect of production efficiency

Active Publication Date: 2018-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: If the spring fails, the bypass hole cannot be closed; the spring chamber needs to arrange a breathing hole, which increases the downhole risk

Method used

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  • A bypass valve for drilling tools
  • A bypass valve for drilling tools
  • A bypass valve for drilling tools

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the drawings.

[0027] Such as figure 1 As shown, the bypass valve for drilling tools proposed by the present invention includes a valve body, a starting sliding sleeve assembly and a closing sliding sleeve assembly. The bypass valve for a drill tool of the present invention and its various parts will be described in detail below.

[0028] Such as figure 1 As shown, the valve body 10 is formed as a hollow pipe section whose diameter is substantially equal to that of a drill collar (not shown), so that the valve body 10 is connected to the drill collar. As shown in the figure, under normal drilling conditions, the drilling fluid enters the drill collar through the valve body 10 and then is sent to the drill bit to carry the cuttings drilled by the drill bit from the bottom of the well to the ground. The side wall of the valve body 10, to be precise, should be provided with an inwardly extending boss 10...

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PUM

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Abstract

The invention relates to a bypass valve for drilling tools. The bypass valve for drilling tools comprises: a valve body, which is configured as a hollow pipe section, the side wall of the valve body is provided with an inwardly extending boss and a bypass hole penetrating the side wall, and the sliding sleeve assembly is activated, It is arranged inside the valve body and can block the bypass hole. When a temporary circulation needs to be established, the starting sliding sleeve assembly moves down to the boss to open the bypass hole; close the sliding sleeve. A sleeve assembly is arranged inside the valve body, and when the temporary circulation needs to be closed, the closed sliding sleeve assembly moves downward to block the bypass hole. The bypass valve for drilling tools has high reliability, good safety performance, and can reduce production costs.

Description

Technical field [0001] The invention belongs to the technical field of oil and gas drilling, and particularly relates to a bypass valve for drilling tools. Background technique [0002] In the process of drilling for oil, natural gas, shale gas or coalbed methane, when complex situations are encountered downhole, such as water hole blockage of the drill bit, damage to the downhole power drilling tool, and plugging operations, it is necessary to temporarily perform rapid circulation and recover Before the full well cycle (drilling continues), it is often necessary to trip and drill frequently, causing large mud loss, prolonging the drilling cycle, and increasing drilling risks and costs. Most of the bypass valves used in the prior art can only establish a temporary rapid circulation, but before resuming the full well circulation, it is necessary to trip and trip at least once. [0003] Patent US6095249 discloses a pressure-controlled spring-type switchable drill tool bypass valve. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/10
Inventor 马东军陶兴华牛新明王甲昌范红康张仁龙刘鹏张海平王果郭瑞昌涂玉林胡彦峰孙连忠
Owner CHINA PETROLEUM & CHEM CORP