METHOD OF WELL REPAIR Russian patent published in 2009 - IPC E21B19/22 

FIELD: mining.

SUBSTANCE: at implementation of method lifting installation is arranged for winding, transporting and performing round-trip operations with flexible continuous pipe string or with flexible continuous bar string. During transporting on the lifting installation there are assembled movably a drum with winded flexible continuous tube string or bar string, a rigidly secured racker and an advancing unit of a feeding mechanism, further, a movably installed feeding mechanism with folding hydraulic jacks and an operator's compartment. After arrival and arrangement of the lifting installation on the well the operator' compartment is turned aside, the feeding mechanism is advanced and centered over the well, then folded hydraulic jacks are lowered, the feeding mechanism is filled with the flexible continuous pipe string or bar string winded on the drum, and round-trip operations are performed with the said pipe string or bar string. During transportation the drum is turned and installed along the lengthwise axis of the lifting installation. To perform round-trip operations the drum is installed in the position along the transverse axis of the lifting installation.

EFFECT: increased efficiency of well repair due to versatility of lifting installation.

4 dwg