下川东地区方位的飘移没有规律可以寻找。所以使得二次定向扭方位的可能性增强。这样就在工程上就增加了难度。下川东地区下部地层,增斜难度比较大。有时候单纯靠调整钻具组合很难让井斜增加,这个时候就必须定向。深井定向难度相当大,应当尽量避免。扶正器的大小对方位漂移影响很大,应该尽可能使用较大尺寸扶正器。 Under the East Sichuan area drifting no rules can be found. So the possibility of secondary orientation twisted position is enhanced. This will increase the difficulty in engineering. Under the eastern Sichuan area under the strata, increasing the difficulty of relatively large slope. Sometimes simply by adjusting the drill combination is difficult to increase the deviation, this time must be oriented. Deep well orientation is quite difficult and should be avoided. The size of the centralizer has a great effect on the azimuth drift, and a larger-sized centralizer should be used whenever possible.