Flechette-type decompression clack-valve for drilling tool
A check valve and arrow-shaped technology, which is applied in earthwork drilling, wellbore/well valve devices, wellbore/well components, etc., can solve problems such as out-of-control blowout, uncontrollable wellhead, waste of oil and gas resources, etc., and achieve structural simple effect
Active Publication Date: 2011-03-16
无锡浩安科技发展有限公司
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AI Technical Summary
Problems solved by technology
When connecting with the drill pipe, the threaded connection fails due to the pressure, and the wellhead cannot be controlled, resulting in out-of-control blowout, resulting in a great waste of oil and gas resources and even serious consequences of human and machine damage.
Method used
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Embodiment 1
[0016] The present invention is mainly composed of a valve body 1, a sealing ring 2, a control pin 3, an arrow-shaped valve 4, an operating handle 5, a compression bolt 6, a sealing ring 7, and the like.
[0017] The present invention mainly adopts that the arrow-shaped valve 4 and the sealing ring 2 are sequentially installed in the valve cavity of the valve body 1. The outer ring of the sealing ring is equipped with a sealing ring 7, which is fixed by a compression bolt 6, and a side of the valve body 1 is provided. Through hole, through hole to seal ring 2, in which control pin 3 is installed, and operating handle 5 is installed on the outer ring of valve body 1.
[0018] Implementation 2:
[0019] The control pin 3 is arranged on the arrow-shaped valve skirt, and the arrow-shaped valve skirt is provided with a hole, and the control pin is inserted to prevent the arrow-shaped body from moving upward. When there is pressure at the wellhead, the arrow-shaped valve cannot be closed,...
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The invention relates to an arrow-like pressure relief check valve, pertaining to the technology field of control device. A valve cavity of the valve body is provided with an arrow-like valve and a sealing ring in sequence. The outer ring of the sealing ring is provided with a sealing loop that is fixed by a clamper bolt; the side of the valve body is provided with a through hole that enters intothe sealing sing, a control pin is installed and an operating handle is arranged in the outer ring of the valve body. The invention has simple, compact and reasonable structure; the arrow-like valve body leaves the sealing ring to open and lock the pressure relief control pin, then is connected with thread of a drill rod and returns from the control pin; the arrow-like valve releases the pin and contacts the sealing ring upward; the arrow-like valve locks, non-returns and stops oil and gas in the tube; under the function of circulation flow, the arrow-like valve body opens and finishes the circulating pressure well operation.
Description
Technical field [0001] The invention relates to a drilling tool arrow-shaped pressure relief check valve, which is used for oil and gas well drilling operations when a blowout occurs at the wellhead, and has pressure relief and check functions to block oil and gas in a pipe. It belongs to the technical field of control devices. Background technique [0002] In the prior art, the arrow-shaped check valve of the drill has only a check function. When a blowout or overflow occurs during tripping, the arrow valve is closed due to the oil and gas pressure in the drilling tool. When connecting with the drill pipe, the threaded connection fails due to pressure, and the wellhead cannot be controlled, causing the blowout to go out of control, resulting in a huge waste of oil and gas resources and even serious consequences of human and machine damage. Therefore, there is an urgent need to solve the current pressure relief function of the arrow-shaped check valve at the wellhead. Summary ...
Claims
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IPC IPC(8): E21B34/02
Inventor 贾仲宣
Owner 无锡浩安科技发展有限公司