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: 2008-05-14
无锡浩安科技发展有限公司
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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 valve 4, an operating handle 5, a compression bolt 6, a sealing ring 7 and the like.
[0017] The present invention mainly uses the arrow-shaped valve 4 and the sealing ring 2 to be installed in the valve cavity of the valve body 1 in sequence. Through hole, the through hole reaches the seal ring 2, wherein the control pin 3 is loaded, and the operating handle 5 is installed on the outer ring of the valve body 1.
[0018] Implementation two:
[0019] Described control pin 3 is arranged on the arrow-shaped valve skirt, is provided with hole on the arrow-shaped valve skirt, and control pin is inserted to stop the arrow-shaped body from moving up. When there is pressure at the wellhead, the arrow valve cannot be closed, and the wellhead pressure can be released for threaded connection. Another feature of the present invention is that the control pin 3 is arranged insid...
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The invention relates to an arrow-shaped pressure relief check valve for drilling tools, which belongs to the technical field of control devices. It mainly uses arrow-shaped valves and sealing rings in sequence in the valve cavity of the valve body. The outer ring of the sealing ring is equipped with a sealing ring, which is fixed with a compression bolt. There is a through hole on the side of the valve body, and the through hole reaches the sealing ring. Ring, in which the control pin is installed, and the operating handle is installed on the outer ring of the valve. The present invention has a simple, compact and reasonable structure; the arrow-shaped valve body leaves the sealing ring and sits to open the pressure relief control pin to lock; after the drill pipe is threaded, the control pin is withdrawn, the arrow-shaped valve body releases the pin, and the upper cone surface contacts the sealing ring. The arrow-shaped valve closes, checks, and blocks oil and gas in the pipe; under the action of circulating liquid flow, the arrow-shaped valve body opens to complete the circulation killing operation.
Description
technical field [0001] The invention relates to an arrow-shaped pressure relief check valve of a drilling tool, which is used for blowout at the well head during oil and gas well drilling operations, and has the functions of pressure relief and check to block oil and gas in the pipe. It belongs to the technical field of control devices. Background technique [0002] In the prior art, the arrow-shaped check valve of the drilling tool has only a check function. When a blowout or overflow occurs during tripping, the arrow valve closes due to the oil and gas pressure in the drill string. When connecting with the drill pipe, due to the pressure, the threaded connection fails, the wellhead cannot be controlled, and the blowout is out of control, resulting in a great waste of oil and gas resources and even serious consequences of human and machine damage. Therefore, it is urgent to solve the function of the current arrow-shaped check valve to release pressure at the wellhead. C...
Claims
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Inventor 贾仲宣
Owner 无锡浩安科技发展有限公司