Design and Research of a New Type of Gas-liquid Driven Screw Drilling Tool
In order to solve the failure of conventional gas screw drilling tools,a new type of gas-liquid driven screw drilling tool is designed in this paper.The ground compressed gas is used to drive the cyclic motion of the liquid in the stator cavity,so as to drive the universal shaft and rotor to rotate,and transmit stable torque and weight on bit.This structure can effectively reduce the accidents of the screw drilling tools flying and pump holding,and achieve efficient gas drilling operations.Aiming at the problems that the transmission shaft of conventional structure often breaks,in this study,the structure of the transmission shaft of vulnerable parts has been improved,and the undercut groove and shaft diameter have been improved.The maximum stress and maximum displacement deformation of the improved transmission shaft are within the allowable range,indicating that the bearing strength of the improved transmission shaft can meet the field use requirements.
screw drilling toolgas-liquid driventransmission shaftfinite element
万方数据
维普
