Impeller type differential torque impactor

Abstract

The invention provides an impeller type differential torque impactor, and solves the phenomenon of sticky slip and vibration produced by a drilling bit in a drilling process. The technical scheme of the impeller type differential torque impactor is that the impeller type differential torque impactor consists of an upper joint, a power assembly, an impact assembly and a lower joint, wherein the upper part of the upper joint is connected with a drilling rod while the lower part of the upper joint is connected with the power assembly; the power assembly produces high-speed rotation motion under an impact effect of drilling fluid so as to drive a flange transmission shaft to be rotated; the flange transmission shaft drives an eccentric impact hammer to be rotated at high speed through a transmission shaft and a transmission pin and also drives an outer gear to be rotated, the outer gear is meshed with an inner gear shell, and lower rotation speed is transmitted to the inner gear shell, sothat an impact transmission shaft is driven to be rotated at lower rotation speed, a rotation speed difference between the impact transmission shaft and an eccentric impact block is formed, and an impact effect is produced to transmit torsional vibration produced by collision to the lower joint through the impact transmission shaft. According to the impeller type differential torque impacter disclosed by the invention, torsional impact and vibration can be continuously produced, so that the rock breaking efficiency of the drilling bit is improved, and the phenomenon of drilling sticking and sticky slip can be effectively avoided.

Description

technical field [0001] The invention relates to an impeller type differential speed torsion impactor used in the fields of petroleum and natural gas shale gas drilling, mining, geological drilling and the like. Background technique [0002] In recent years, with the country's increasing demand for oil and natural gas, the exploitation of shale gas is also a hot spot and a challenge. Because during the drilling process, due to the driller’s technical and experience problems, the driller’s technical and experience problems often cause the drill to be sent too late or too fast, or because of the friction of the well wall, the drilling pressure applied to the drill bit is unstable, which affects the rock breaking efficiency. It is even possible to damage the drill bit, crack the cutting teeth of the drill bit, etc. due to the sudden increase of the drilling pressure, which will affect the drilling speed. On the other hand, when the PDC drill bit is drilling hard or abrasive for...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an impeller type differential torsion impactor to overcome the problems of drill bit sticking and stick-slip of the drill string during the drilling process, resulting in failure of the drilling tool and low ROP. Technical flaws to increase drilling speed

Images