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由于现有油田油藏衰竭，延伸钻井迅速推广。据ＤｒｉｌｌｉｎｇＣｏｎｔｒａｃｔｏｒ报道，延伸井水平位置的世界记录为１０－１ｋｍ。为解决延伸钻井的转向和控制问题，美国斯伦贝谢Ａｎａｄｒｉｌｌ公司研制成一种新型井底动力钻具———转向驱动系统。该系统由控制装置和偏
Due to the depletion of existing oilfield reservoirs, extended drilling has rapidly been promoted. According to DrillingContractor, the world record for horizontal wells extending well is 10-1km. In order to solve the problem of steering and control of extended drilling, American Schlumberger Anadrill company developed a new type of bottom hole power drill --- steering drive system. The system consists of control and biasing