Drilling tool with spinning coupling function and operating method of drilling tool

Abstract

The invention relates to a drilling tool with a spinning coupling function in the drilling process and an operating method of the drilling tool, and aims to improve the drilling efficiency and the penetration rate and reduce the drilling cost. The technical scheme is that an overflow valve is mounted in an upper connector; a control valve at the lower part of the upper connector is in threaded connection with an inner hole of the upper connector; the control valve, a casing and the upper end surface of a core shaft form a volume variable cavity; a fluid passage is formed in the middle of the core shaft; a sealing part is arranged between the outer wall of the upper end of the core shaft and the inner wall of the casing; a thread in the lower part of the core shaft is used for being connected with a drilling bit; a spiral hole is formed in a spinning sleeve; followers of the spinning sleeve are mounted on the core shaft; one-way lower ratchets are arranged at the bottom of the spinning sleeve, and are matched with upper ratchets at the upper part of a lower connector. The drilling tool is simple in structure, is suitable for the well repairing and drilling operations, and can provide torque and impact power at the same time, weaken the stick-slip phenomenon of the drilling bit, increase the penetration rate, improve the drilling efficiency and reduce the drilling cost.

Description

technical field [0001] The invention relates to a drilling tool for providing rotary-percussion coupling in the drilling process and a working method thereof, which is suitable for oil and gas drilling engineering and workover services, and can also be used for geological exploration hole drilling engineering. Background technique [0002] At present, most of the drilling tools used in oil fields can only provide axial impact force or circumferential torque. For hard formations or abrasive formations, when the drilling tools only provide axial impact force, the penetration depth of the drill bit is not enough. , the ROP needs to be improved; and when the drilling tool only provides circumferential torque, it often lacks enough torque to destroy the formation, so that the drill bit stops rotating instantly, and stick-slip and sticking occur. At this time, the drill string will be like clockwork. The same tightening, the torque is accumulated and released quickly, resulting in...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the drilling tools used in oil fields can only provide axial impact force or circumferential torque. For hard formations or abrasive formations, when the drilling tools only provide axial impact force, the penetration depth of the drill bit is not enough. , the ROP needs to be improved; and when the drilling tool only provides circumferential torque, it often lacks enough torque to destroy the formation, so that the drill bit stops rotating instantly, and stick-slip and sticking occur. At this time, the drill string will be like clockwork. The same tightening, the torque is accumulated and released quickly, resulting in torsional vibration of the drill string, and at the same time, the drill bit will also be subject to higher impact loads, which will adversely affect the service life of the drill bit and drill string accessories.

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