Wellhead hoisting position accurate control device and method

The invention provides a wellhead hoisting position accurate control device and method. The device comprises a mounting platform, and a mast hoisting unit, a mast amplitude variation unit and a lifting unit which are arranged on the mounting platform. The method is realized by adopting the device for accurately controlling the hoisting position of the wellhead. The device is good in hoisting stability, the hoisting height and position of the blowout preventer group can be accurately controlled, and the device is good in fire resistance and high temperature resistance and long in service life. 本发明提供了一种井口吊装位置精确控制装置及方法。所述装置包括安装平台，以及设置在安装平台上的桅杆吊装单元、桅杆变幅单元和起升单元。所述方法采用上述的井口吊装位置精确控制装置来实现。本发明的吊装稳定性好，能够对防喷器组吊装高度及位置进行精确控制，并且装置的耐火耐高温性能好，使用寿命长。