小位移直井钻井综合防斜纠斜技术

Drilling Techniques for Preventing Small-Displacement-Hole from Inclination and Straightening Holes

由于小位移直井允许水平位移小、且部分井有方位限制，因此钻井难度很大，采用常规的防斜纠斜技术难以满足油田勘探开发的需要。本文介绍了一套小位移直井钻井综合防斜纠科技术，重点是地层自然造斜规律的利用、螺旋钻铤、PDC钻头、偏心接头防斜技术，以及定向纠斜技术。

It is very difficult to drill straight holes whose displacement less than standard ones,especially for some wells that are controlled in a certain direction,that is also not easy to meet the need of exploration and development in oilfields. This paper gives the composite drilling techniques in preventing small-displacement-well from inclination and strightening holes,included the utilization of natural deflecting regularity,the spiral collar,PDC bit,offset subs and the straighting-technique of directional wells.