Design and Analysis of Folding Tubing Transfer Device

In order to solve the problems such as high labor intensity at the time of make up, break out and transfer of tubing as well as the nonsynchronous tubing transfer speed and elevator speed, a folding tubing transfer device was developed. The device carries out tubing transfer by hydraulically driven travelling block, the speed for the travelling block to transfer the tubing changes with the change of falling and rising speed of the travelling elevator, and the speed control of the travelling block is realized by controlling the hydraulic oil displacement of the manually operated reversing valve of the hydraulic motor, which meets the requirements for the field operator to control the speed of running and pulling tubing. Field application results show that the tubing transfer device is convenient for loading and unloading, stable and reliable in operation, and accurate in tubing alignment; worked in with hydraulic elevator, the average speed of tubing make up/break out is 45 per hour, and 50 per hour maximally, which alleviates the labor intensity of workers, significantly improves the workover operation efficiency, and obviously improves the safety performance. The research results provide reference for users, designers and managers in related fields.