Development and Application of Pressure Operation Device for Lifting and Lowering Columns

Aiming at the problems of low construction efficiency and the inability to raise the column under pressure in China, the lifting and lowering column under pressure operation device was developed. The under pressure lifting and lowering column work platform was designed, and the column was passed through the column discharge hole in the middle of the work platform and stood on the ground Top; The wireless remote control system of the triple ram blowout preventer can handle the risk of out-of-control wellhead in time and safely; the differential control of the lift cylinder can realize the rapid lifting and lowering of the pipe string under pressure when the load is light, and improve the operation efficiency; the detection of the tubing coupling detector The success rate is high, which provides the basis for the action of each blowout preventer group of the pressurized operation device. The lifting column pressurized operation device has been applied 7 well times on site, and the construction efficiency is increased by more than 11.5% compared with the conventional operation method. The performance of the device is safe and reliable. , To meet the requirements of underpressure operation with well head pressure of 21 MPa and well depth within 5 000 m.