| Because the oil resources in human plays an extremely important role in daily life, itis non-renewable natural resources, global competition for the worse, from the Angle ofthe strategy of oil security in our country, must strengthen and insist on domestic self-helpmining strategy, dissolve the risk, maintenance, oil security. But because of our oil field athigh structure formation, vertical Wells has become a difficult problem, serious impact onthe domestic oil drilling buffet. In this background, this paper on the basis of AADDS1drill, vertical drilling orientation is studied the causes of deficiency of restoring hydraulicsystem pressure when working, and designed the wellbore annulus pressure compensator.First of all, this paper detailed analyzes the vertical drill AADDS-1the structure andworking principle of guiding restoring hydraulic system of the mathematical modeling ofcomponent and system simulation modeling analysis, analyzing the causes of deficiencyof the system pressure and drilling downhole environment.Second, for drilling downhole special pressure are analyzed in detail, it is concludedthat the change of the density of drilling fluid while drilling is a major cause of guiderestoring hydraulic system, and use the experience formula change the density of drillingfluid while drilling formula was deduced. Based on the analysis of the internal pressure inthe wellbore at the same time, analysis the downhole pressure compensator somecompensation problems should be resolved in the mine.Finally, this paper puts forward a kind of special downhole conditions suitable fornew downhole pressure compensator, and design the structure model and simulationmodel of the joint simulation analysis was carried out, it is concluded that the pressurecompensator can meet guide restoring hydraulic system with pressure compensationrequirements. Also analyzed the pressure compensator to guide restoring the discharge ofoil absorption has good effect in the hydraulic system. |
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