Research on automatic upgrade scheme of vertical shaft drill suitable for trip-out coring technology

Abstract:

Aiming at the problems of high labor intensity， high safety risks and insufficient process coordination in field operations of vertical shaft drills using trip-out coring technology， this paper proposes an automatic upgrade scheme and human-machine collaborative operation method. Adopting the technical route of "main engine upgrading and incremental supporting matching"， the scheme replaces mechanical vertical shaft drills with electric-drive vertical shaft drills， realizing stepless speed regulation， real-time parameter monitoring and remote control through electric transmission. On this basis， a collaborative operation system covering derrick and wellhead is formed by integrating self-elevating drilling derrick， remote-control elevator， platform manipulator， integrated wellhead pollution reduction device and pipe spinner. Finite element simulation is conducted on the derrick structure to verify the structural safety and reliability under the lifting state. In addition， a collaborative tripping operation process is designed with clear time sequence connection and trigger conditions for each procedure， and a PLC bus-based safety interlock logic is established. Theoretical analysis shows that the scheme reduces the team staffing from 3~4 workers to 2 and realizes unmanned derrick operation. Meanwhile， it reduces the wellhead pollution area and shortens the tripping time of 6 m drill stands from 100 s to about 70 s， improving the tripping efficiency by approximately 42.9%. This study provides a feasible technical path for the automatic upgrading of vertical shaft drills adapted to trip-out coring technology， and has positive significance for promoting staff reduction， efficiency improvement and green exploration in the geological drilling industry.