Patent ID: 9732570
Date: 2017-08-15
CPC Classifications: E21B

Claim:
1. An apparatus for tripping oil pipe, comprising an elevator transfer device for transferring an elevator connectable to an oil pipe, the elevator transfer device being configured for enabling continuous, automatic tripping operations of the oil pipe, wherein the elevator transfer device comprises a lifting assembly for lifting and releasing the oil pipe engaged with the elevator, and an elevator transport assembly for transferring the elevator at a wellhead, or on the lifting assembly, or both, wherein an upper connection point and a lower connection point are respectively located at two intersection points between a trajectory of the elevator transport assembly and a trajectory of the lifting assembly, and the elevator transport assembly and the lifting assembly are configured to operate simultaneously, wherein the lifting assembly and the elevator transport assembly are configured to perform a direct handover of the elevator at the upper connection point, and one of the lifting assembly and the elevator transport assembly is configured to pick up the elevator while the other is configured to release the elevator at a preset location below the lower connection point, and the elevator transport assembly is configured to transfer the elevator as the elevator is empty.