Hydraulic-magnetic transmission wellbore cleaning tool with overload decoupling device

Abstract

The invention relates to an overload decoupling device for a hydraulic-magnetic transmission borehole cleaning tool. The overload decoupling device is formed by making an input end connector, an overload movement body and an output end connector sleeve a rotary shaft in sequence; the input end connector is integrally formed by insertion-side cooperation teeth and an axial meshing flange; the overload movement body is of a dual-side ring structure, one side of the dual-side ring structure is a spherical groove, and the other side of the dual-side ring structure is a cylindrical groove; the rotary shaft is cylindrical, the rotary shaft and a radial tooth-type meshing mechanism are integrally formed, one end of the rotary shaft is connected with the input end connector through a bearing, several balls are distributed in a ball cavity, each ball is located in a meshing tooth groove of the radial tooth-type meshing mechanism, the rotary shaft is provided with a thread, a disk-shaped springsheet, a spring sheet cooperating body and an adjusting nut sleeve the rotary shaft in sequence, and the output end connector is fixed to the other end of the rotary shaft. By means of the overload decoupling device, when rotary blades touch the wall and are overloaded, the transmitted torque is unloaded; after overload is relieved, connection is automatically reset, and torque is transmitted.

Description

Technical field: [0001] The present invention relates to the overload protection, unloading and restarting device after the rotary blade of the hydraulic-magnetic transmission wellbore cleaning tool touches the well wall during the drilling process of oil and gas wells, and specifically relates to the hydraulic-magnetic transmission wellbore cleaning tool for overloading decoupling device. Background technique: [0002] At present, well types such as high-inclination wells, horizontal wells, and extended-reach wells are often used in offshore oil and gas exploitation to increase the drainage area of ​​the wellbore and maximize the production of a single well. Due to the existence of the build-up section (the curved well section whose inclination angle increases from 0° to 90°) and the horizontal well section in these well types, the cuttings are not easily carried out of the wellbore by the drilling fluid under the action of the gravity component, and cuttings appear. Pheno...

AI Technical Summary

Problems solved by technology

[0005] The rotating blades of the hydraulic-magnetic transmission wellbore cleaning tool are located in the drilling fluid annulus outside the drill pipe. During the drilling process, due to the eccentric rotation of the drill pipe or the incomplete circumferential rock breaking and the well wall protruding, it may cause the rotating blades to touch. Well wall, stop rotating; the well wall falls off and large rocks block the blades, which will also cause the rotating blades to block

[0006] Since the hydraulic pressure difference power input end relies on the flow of drilling fluid to provide power, as long as the drilling fluid circulates normally, even if the permanent magnet blades are blocked, the hydraulic pressure of the drilling fluid will still act on the hydraulic pressure difference blades. The liquid contains a large number of solid particles, which will cause serious erosion of the hydraulic pressure difference blade and shorten the working life of the tool

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