Analysing And Research On Characteristic Of Micro-hydraulic Power System Under The Supernormal Ambient Pressure

Automatic vertical drilling system was a system of down-hole steering closed-loop drilling. Automatic vertical drilling system could correct well incline automatically and keep hole vertical, with a drilling device of high technological content and advanced electro-hydraulic. The simulation and dynamic characteristic on vertical drilling system in the down-well complex environment were analyzed. The analysis could help us understand the work conditions of micro-hydraulic power system of down-well slope correction mechanism.The paper had discussed existing status at home and abroad of automatic vertical drilling technology. The differences between the manner of power extraction of automatic vertical slope inclination system abroad and the manner about power extraction of slope correction system developed by us had been analyzed briefly. The AMEsim software was used to simulation research on the dynamic characteristic of micro-hydraulic power system under supernormal ambient pressure. The simulation research help us understand the work characteristic of this micro-hydraulic power system under down-well super-high pressure environment. The characteristic of the key hydraulic components electromagnetic valve and its effect on system dynamic were analyzed. The simulation data of micro-hydraulic power system from AMEsim was conbined, and a simulation research on friction torque between hydraulic steering mechanism and drill string had been carried on with ADAMS. The problem that the relative rotation between the steerable sleeve and the drill string was maintained or not to produce driving power of hydraulic steering and slope correction mechanism was in-depth discussed. According to the torque of sleeve and drill string measured on automatic vertical drilling tools prototype, the simulation analysis and results of ADAMS was validated.