DEVICE FOR REMOVING OF PROCESSING DEPOSITIONS, WASHING AND WELLS DEVELOPMENT WITH LOW FORMATION PRESSURE (VERSIONS) Russian patent published in 2009 - IPC E21B37/00 E21B21/00 

FIELD: gas-and oil industry.

SUBSTANCE: group of inventions relate to building and operation of wells field, particularly to cleaning, reclamation and washing after its construction or repair. Device contains body connected to pipe string, located in its bottom part packer collar and interacting to it packer piston, connected to feed channel of active medium with supertension cavity, installed in top part of body over packer collar water ejector, including connected to active medium feed channel nozzle, diffuser with outlet hole into over-packer space and mixing chamber, connected to under-packer area by inactive medium feed channel, connected to the bottom of body by pipes and implemented with ability of lengthwise displacement relative to its flushing - damaging unit, implemented in the form of pusher. Its tubal body is rigidly connected to connect with boost pressure cavity pipes. In central cavity of tubal body it is located mobile force rod with piston, connected to hydraulic motor, on shaft of which it is installed damaging tool. According to the second and third version device is outfitted by brake of force rod, shaped in the form of closed space, connected to under-packer area by throttling channel. In the fourth version brake is implemented in the form of installed over pusher additional tubular body with dividing piston and rod. According to the fifth version hollow rod is implemented with ability of fixation by means of differential piston in top position relative to tubular body.

EFFECT: advancing of the device features, increase of effectiveness and reliability of its operation.

20 cl, 6 dwg