Full-hole well trajectory control drilling technology study and application

To improve well trajectory controlling capacity,shorten drilling cycle,and decrease drilling cost,the technique mechanism of full-hole trajectory control drilling and drilling tool assembly were studied.The high efficiency high quality bit and single bent screw building assembly were mixed.And on the basis of drilling tool constructional force bearing analysis and operating technique requirements,the single bent angle of the screw and the sizes of upper and lower stabilizers were optimized,and the applicable drilling parameters were matched,to carried out the full-hole trajectory control drilling for all the four sections of vertical section,buildup section,angle holding section,and drop off section,with merely one suit drilling assembly.Real case results proved the technique could improve drilling efficiency significantly.