关键词: 修井作业, 远程控制, 起下油管, 吊卡, 液压钳

Abstract: Based on the existing hydraulic, electric and elevating conditions of workover rig, a remote control device for trip-in and trip-out service of pipe string is developed by means of electronic control, hydraulic pressure and pneumatics technology. It is mainly composed of four modules -automatic suspension and centralization system, tubing screwing system, tubing conveying system and electric control and hydraulic driving system. Control commands of all the modules are concentrated on an operational panel and a handheld remote controller. By means of the operational panel, the driver can remotely control and complete a series of tasks, such as to catch or put, lock, hang, push, centralize and center the pipe string, hydraulically push or pull the pincer in place, make and break, shift and automatically gap, and finally trip in or trip out the pipe string. One site worker can make the tubing rolling and in place by pressing the remote controller. Two people can conduct a series of work without anyone else at the wellhead. Field application indicates that this device is small in volume, light in weight, stable in trip-in and trip-out service and reliable for safety while reducing amount of operational workers and labor intensity and improving work safety. The pipe string trip-in and trip-out does not affect well emergency rescue or wellhead personnel escape. The device does not increase the cost either. Its operational speed is controllable and nearly the same as manually operated.

Key words: workover service, remote control, pipe string trip-in and trip-out, hang and stick, hydraulic pincer