WELL-DRILLING THRUSTER

摘要

A well-drilling thruster. Same comprises, arranged at the rear extremity part, an electro-hydraulic composite pipe (11), an actuator used for driving the well-drilling thruster forward, and, sequentially fitted and connected, a drive motor (13), a shaker (14), and a drill head (15). Both front and rear extremities of the actuator respectively are connected to one centralizer (12). Flow channels in communication with the electro-hydraulic composite pipe (11) for a well-drilling fluid to pass through are provided within both the actuator and the centralizer (12). The actuator is also provided with flow channel B (2) used for return flow of the fluid. The well-drilling thruster provides: during an exploration and development process of an oil and gas well, obviation of the need for coordination with a land-based drilling rig or an offshore drilling platform, use of the well-drilling thruster for continuous well drilling, implementation of well-drilling fluid circulation and high-speed communication via the electro-hydraulic composite pipe, thus implementing to the greatest extent safe, highly efficient, and economical well drilling.