One-way bypass screw drilling tool

Abstract

The invention provides a one-way bypass screw drilling tool, which mainly comprises a bypass valve assembly realizing one-way bypass, a motor assembly, a universal shaft assembly and a transmission shaft assembly, wherein the bypass valve assembly realizing one-way bypass comprises a bypass valve and a one-way valve; the bypass valve mainly consists of a valve body, a valve core, a large spring, a valve opening, a clamp spring and a retainer ring; the one-way valve comprises a body, a valve rod, a small spring and a screw cap; the one-way valve and the bypass valve are mutually matched and connected; connecting external screw threads are arranged on the outer pipe wall of the body of the one-way valve; connecting internal screw threads are arranged on the inner wall of the valve opening of the bypass valve; the one-way valve is arranged on the valve opening of the bypass valve through the connecting internal screw threads and the connecting external screw threads, so that the one-way valve is arranged in the valve opening of the bypass valve; an outer opening of the one-way valve is directly communicated and connected with an outer opening of the valve opening of the bypass valve; and an inner opening of the one-way valve is directly communicated and connected with an inner opening of the valve opening of the bypass valve. The one-way bypass screw drilling tool has the advantages that the one-way bypass is realized; the structure is simple; the reliability is high; the service life can be prolonged; the pipe tripping is reduced; and the drilling cost is reduced.

Description

technical field [0001] The invention relates to a tool for oil and gas exploration and development, in particular to a one-way bypass screw drilling tool suitable for gas-based fluid drilling technology and mud medium deep well and ultra-deep well drilling with high temperature and strong vibration. Background technique [0002] Screw drilling tools are currently the most widely used downhole dynamic drilling tools in the field of oil and natural gas drilling at home and abroad. With the continuous development of modern drilling technology, especially with the promotion of compound drilling, screw drilling tools play an important role in drilling operations. There are more and more functions, and the role is getting bigger and bigger. The screw drilling tool mainly includes bypass valve assembly, motor assembly, universal joint shaft assembly and transmission shaft assembly; its bypass valve assembly, motor assembly, universal joint shaft assembly and transmission shaft asse...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of screw drilling tool with one-way bypass; The screw drilling tool of its one-way bypass has realized one-way bypass, has overcome the defect of two-way bypass of general screw drilling tool, so in drilling During the period of drilling, single connection, and pump stop, impurities such as mud sand and thread film in the downhole annulus cannot enter the water hole of the drilling tool through the valve port of the bypass valve of the one-way bypass of the screw drilling tool; Accidents such as screw stuck, screw damaged in advance, drill bit water hole blocked, directional well instrument stuck in drilling tool water hole, etc.; and its structure is simple, stable and reasonable

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