DEVICE FOR WELL BEDS PROCESSING Russian patent published in 2014 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: bed processing device comprises through packer and uncoupler. Said uncoupler comprises barrel and slide valve arranged inside said barrel and connected therewith by cut-off elements. Slide valve has seat. Barrel has radial holes and extra cut-off elements. Besides, the barrel is furnished with bypass channel to communicate the barrel top and bottom parts bypassing the slide. In initial position, said bypass channel and radial holes of the barrels are tightly stopped by slide valve. Slide valve has central bore and radial channels. Said radial channels at downward displacement of slide valve relative to barrel can communicate in turns with barrel radial holes and barrel bypass channel. Slide valve lower part has circular groove shaped to ring dents directed opposite the lock ring to interact therewith. Lock ring is fitted in conical groove made at barrel lower part, above extra cut-off elements. Barrel is provided with slide valve stroke limiter arranged under extra cut-off elements. Shutoff element is composed by variable-section rod.

EFFECT: perfected design, enhanced performances, higher reliability.

4 dwg