After many years researches and spread, the horizontal drilling techniques have made great advance.

多年来,胜利油田经过不断的技术攻关研究与推广应用, 水平井钻井技术取得了很大进展.

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Extended - drilling is a new technology which is developed after horizontal drilling in 1990's.

大位移井钻井是继水平井之后国外90年代发展起来的钻井新技术.

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Most downhole power drills for horizontal drilling are constituted basically by positive displacement drills.

绝大多数的水平井井下动力钻具是以螺杆钻具为基础构成的.

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