And it is pointed out that the casing program for straight hole may be used for the directional welts also but it is necessary to control the dog-leg of less than 15 ° 100m.
本文总结了下套管的有关计算及施工经验,并指出定向井可以采用直井的井身结构,但需控制全角变化率小于15度/100米。
Study of the Design on the Tower Building with Dog-Leg Staircases
塔式高层建筑楼梯间设计探讨
A differential pressure sticking was encountered at 2598 m under a circumstances of severe sloughing, and with enlarged hole gauge and dog-leg intervals during a pipe connection.
在井下严重垮塌、井径大、有S形井段的情况下,钻至2598m接单根时发生压差粘附卡钻。
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