An anti-stick-slip torsional impact drilling tool

Abstract

The invention relates to a stick slip prevention torsion impact drilling tool which is used for improving the penetration rate and well quality in the field of drilling engineering. By the adoption of the stick slip prevention torsion impact drilling tool, the problem that a drilling tool and a well body are severely damaged by the stick slip phenomenon in the drilling process. According to the technical scheme, the lower end of an output shaft is connected with a screw thread of a drill bit; the upper end of an outer shell is connected with a screw thread at the lower end of an upper connector; the lower end of the outer shell is connected with a screw thread at the upper end of a transmission shell; the outer circle of a movable valve ring is in interference fit with a stepped hole in the lower portion of an inner cavity of a movable valve seat; the outer circle of a static valve is in interference fit with a stepped hole in the upper portion of an inner cavity of a transmission shaft; the lower end of a spiral rotor is connected with a screw thread at the upper end of the movable valve seat; the transmission shaft is arranged in an inner cavity of the transmission shell; the external octagon shape in the middle of the transmission shaft is in clearance fit with the internal octagon shape in the middle of the inner cavity of the transmission shell; the lower end of a spiral shell is connected with a screw thread at the upper end of the output shaft; and the upper end of a spiral shaft is connected with a screw thread at the lower end of the transmission shaft, and a spline of the spiral shaft is in clearance fit with a spline of the spiral shell. The stick slip prevention torsion impact drilling tool generates high-frequency micro-amplitude circumferential reciprocating swing, the stick slip phenomenon can be prevented, and the penetration rate is increased.

Description

technical field [0001] The invention relates to an anti-stick-slip torsion impact drilling tool used in drilling engineering for improving the drilling speed and the quality of the well body. Background technique [0002] In the oil and gas industry, drilling engineering is a technically difficult, high-input and high-risk operation, and it is also an indispensable link in the development of oil and gas reservoirs. Various accidents are often induced due to complex working conditions during the drilling process. The stick-slip phenomenon often occurs during the drilling process. The so-called stick-slip phenomenon means that during the drilling process, the drill bit is stuck at a certain position and cannot rotate, and the drill string above the drill bit may twist several times under the action of torque until the drill string accumulates After the torque is large enough, the drill bit rotates rapidly in an instant, and the torque accumulated in the drill string is suddenl...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the stick-slip phenomenon causes great harm to the drilling tool and the well body during the drilling process, a special anti-stick-slip torsion impact drilling tool is provided.

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