Affiliation:
1. Key Laboratory of Oil and Gas Equipment Ministry of Eduction, School of Mechanical Engineering, Southwest Petroleum University, Chengdu, China
Abstract
The phenomenon of stick-slip vibration is widespread in the exploration of deep and ultra-deep wells. It causes the reduction of the mechanical drilling rate and wastes the driving energy. Besides, it also accelerates the aging and failure of the drill strings and threatens the safety of drilling seriously. In order to effectively control the stick-slip vibration of the drill string, a new type of torsional vibration tool is proposed in this paper firstly. Then, the theoretical model of the drill string system based on the tool is established. And then, the viscosity reduction characteristics of the new torsional vibration tool are studied by the PID control method. Finally, field tests were carried out in comparison with simulation. The results show that the new torsional vibration tool can reduce the stick-slip vibration. And the two PID control equations can both control the drill bit speed in real time through changing the turntable speed. The results also have important reference significance for reducing and controlling the stick-slip vibration of the drill string and improving the rock-breaking efficiency.
Funder
National Natural Science Foundation of China
State Scholarship Fund of the China Scholarship Council
National Science and Technology Major Project
Subject
Mechanical Engineering,Condensed Matter Physics
Cited by
25 articles.
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