METHOD FOR PACKER REMOVAL Russian patent published in 2007 - IPC E21B23/00 

FIELD: oil and gas production industry, particularly working packer removal from gas or gas condensate well having multi-profiled bore including deviating one.

SUBSTANCE: method involves lowering releasing tool into producing string interior; releasing packer; lifting releasing tool from well; removing producing string to ground surface; lowering producing string stem connected to drilling string in the interior and connecting producing string stem with packer. Cartridge filled with liquid and provided with electrodes arranged inside the cartridge is inserted in producing string stem. The electrodes are separated one from another with gap and connected with lower ends of two-conductor high-voltage cable passing inside drilling string. Upper ends of high-voltage cable are connected to high-voltage pulse source and packer is brought into reciprocation by applying electro-hydraulic impacts thereto by supplying high-voltage pulses to electrodes.

EFFECT: decreased labor inputs and time of packer removal from well due to increased impact force and simplified structure of mechanism causing packer reciprocation.

3 cl, 4 dwg