Safety valve

A safety valve and float valve technology, applied in the field of safety valves, can solve problems such as drilling accidents and falling wells, and achieve the effects of convenient processing, simple maintenance, and reduced production costs

Pending Publication Date: 2018-05-11
TIANJIN LILIN GASOLINEEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The body of the bypass valve and the anti-drop shell are connected by threads. Once the connecting thread breaks, the part below the break will fall directly into the well, causing drilling accidents.

Method used

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Embodiment Construction

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0021] In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

[0022] like figure 1 As shown in the figure, a safety valve includes a safety valve body 1, a float valve 2, a fixing nut 3, an in...

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Abstract

The invention relates to the technical field of screw drilling tools, in particular to a safety valve. The safety valve comprises a safety valve body, a float valve, a fixing nut, an integrated-type filter screen, a wave spring, a stop ring, an anti-falling nut, an anti-falling rod and a flow-guiding type anti-falling mat. A valve hole is formed in the safety valve body, a stair step is arranged on the valve hole, the integrated type filter screen is mounted and clamped on the stair step and fixed through the stop ring, the float valve is mounted at the lower end of the integrated type filterscreen and fixed through the nut, annular spaces are left between the periphery of the float valve and the valve hole, and the wave spring is arranged between the float valve and the integrated type filter screen. The anti-falling rod is arranged in the safety valve body, the anti-falling nut is arranged on the front portion of the anti-falling rod, and the flow-guiding type anti-falling mat is arranged between the anti-falling nut and the anti-falling rod. Through structurally integrated design of a bypass valve body and an anti-falling shell, the production safety coefficient is improved, the production cost is reduced, the length of the anti-falling shell is shortened, and raw materials are saved.

Description

technical field [0001] The invention relates to the technical field of screw drilling tools, in particular to a safety valve. Background technique [0002] In the field of petroleum and geological drilling machinery, the commonly used screw drilling tool, also known as fixed displacement motor, is a positive displacement downhole power drilling tool. Due to a series of characteristics of its own structure and performance, screw drilling tools have become an indispensable drilling tool in drilling operations. It plays a particularly important role in special processes such as wells, multilateral wells, and cluster wells. In trenchless through drilling engineering, screw drilling tools are also the preferred drilling tools for directional drilling in complex formations and hard rock formations. The screw drilling tool consists of a bypass valve, an anti-drop assembly, a motor assembly, a cardan shaft assembly and a drive shaft assembly. The bypass valve is an auxiliary part ...

Claims

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Application Information

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IPC IPC(8): E21B21/10E21B4/02
CPCE21B4/02E21B21/103
Inventor 韩文全罗绪良刘海宁戎刚
Owner TIANJIN LILIN GASOLINEEUM MACHINERY
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