High-temperature-resistant all-metal ball type piston downhole drilling tool

Abstract

The high-temperature-resistant all-metal ball type piston downhole drilling tool comprises an upper connector, an outer barrel and a bearing joint, a drilling tool power component is arranged in the outer barrel, and the drilling tool power component is mainly composed of a flow distribution suite, a stator piston assembly, multiple sets of balls and a rotor with a spiral groove. The stator piston assembly is composed of an upper guide piston and a lower guide piston in a matched mode, the piston assembly has the very good sealing characteristic, a mature machining technology is adopted, loss of kinetic energy of drilling fluid caused by leakage of a drilling tool is greatly reduced, and torque output of the drilling tool is increased. Meanwhile, drilling fluid is alternated in the piston, the advantages of lubrication and cooling are achieved, drilling tool abrasion and kinetic energy loss are reduced, and the service life is prolonged; the flow distribution suite adopts two groups of flow distribution valves which are rotationally matched with the rotor to open and close the valves, and the upper group and the lower group of drilling tools are respectively arranged, so that the relative pressure is mutually counteracted, and the stress condition of the drilling tools is improved; the multiple sets of balls convert axial movement of the stator piston into rotating movement of the rotor, the advantage of small friction resistance of circumferential rolling movement is achieved, and the output efficiency of the drilling tool is improved. The whole drilling tool is made of all-metal materials, so that the underground drilling tool has the characteristic of high temperature resistance. Therefore, in order to solve the problems that a traditional downhole drilling tool is not resistant to high temperature, prone to leakage, low in torque and short in service cycle, the high-temperature-resistant all-metal ball type piston downhole drilling tool is creatively provided.

Description

technical field [0001] The present application relates to downhole drilling tools, in particular to a high temperature resistant all-metal ball-type piston downhole drilling tool. Background technique [0002] Drilling in deep drilling fields such as deep earth, ultra-deep wells and high-temperature geothermal uses bottom-hole power drilling tools to drive drilling. There are two basic types of screw drilling tools and turbo drilling tools. When the temperature of traditional rubber screw drilling tools exceeds 180°C, the drilling tools will fail rapidly; all-metal screw drilling tools have large leakage and low torque due to the clearance fit of the stator and rotor, and cannot meet the working requirements; while turbo drilling tools belong to impact motors, non-volumetric type The motor, the torque is too small to meet the drilling requirements and cannot work normally. Therefore, in the present application, combined with the high-precision sealing effect of the piston, ...

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Problems solved by technology

[0003] In view of the related technologies mentioned above, the traditional downhole drilling tools have the disadvantages of high temperature failure and low efficiency when drilling downhole

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