METHOD FOR OPENING MAN-CAUSED GAS FIELDS AND FIELDS WITH ANOMALOUS HIGH STRATAL PRESSURE

摘要

Method for opening man-caused gas fields and beds with anomalous high stratal pressure includes drilling of well to productive horizon, with fixation of stem by drive pipes, with arrangement of wellhead connections with anti-gusher equipment, with opening productive horizon at permanently tightened pipe and annular space. Drilling is performed by rotation of rock-breaking instrument with simultaneous motion of drill string at tightened annular and pipe space, with fixation of drill string against laydown from the well at opening man-caused gas fields and fields with anomalous high stratal pressure. After opening one implements measures for prevention of not controlled flow of gas through mouth of the well and to the day surface, out of the boundaries of the well, through controlled degassing of washing liquid. Such performance of the method makes it possible to provide increase of works conduction safety.