Field Test of Automated Strap-down Vertical Drilling System

Automated strap-down vertical drilling system(AVDS) is composed of a strap-down stabilization platform and a deviation control and correction mechanism.It performs inclination control and correction initiatively while drilling by applying dynamic push-lean and it can remarkably improve the penetration rate by making WOB increased during drilling.During the field test from 2 436.00 m to 2 610.79 m in well Anshun-1,the deviation angle decreased from 6.25° to 0.25°.The average ROP was 1.02m/h,and the average footage was 87.4 m.Compared with traditional drilling modes,it improved the penetration rate by 25.9% and improved the footage by 18.3%.The stability and reliability of the system met design requirements and the drilling cost was reduced.