WALL PACKER-PLUG Russian patent published in 2010 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas industry and is intended for temporarily blocking of wellbore. Packer-plug comprises barrel, sealing element, sealing element retainer representing O-ring interacting with barrel cuts, main and extra cones, the former interacting with sealing element, both being coupled with main and extra slips, detachable assembly with cylindrical cuts at top part outer surface and top entrapping heat, locking balls and thrust ring. Locking balls are fitted in barrel openings to interact with said detachable assembly from inside and, from outside, with hollow sleeve coupled with extra cone. Thrust ring top and bottom faces are coupled with main and extra slips, respectively. Extra cone is made up of several rams for extra slips. Rams can radially move relative to cartridge. Main cone inside has cylindrical recess, while thrust block mates main cone recess and represents barrel swell interacting with extra cone rams in transportation position and located above said rams after withdrawing packer-plug after limited motion of detachable assembly upward relative to barrel to release balls.

EFFECT: simple design, safe withdrawal.

3 dwg