DEVICE FOR ELIMINATION OF ABSORPTIONS OF WASHING LIQUIDS IN WELLS Russian patent published in 2010 - IPC E21B33/13 E21B27/02 

FIELD: oil and gas industry.

SUBSTANCE: invention is equipped with container to arrange backfill water-swelling polymer in it, and packer assembly installed on drill pipes above container. Packer assembly has cylindrical housing with possibility of its downward movement, packer located inside housing and fixed on drill pipes; at that device is provided with system of radial holes made in drill pipe and providing control of packer opening and piston located in container to extrude the polymer. When the backfilling zone is reached, owing to excess pressure in drill pipes there performed is packer release of sealing element; after that container is unsealed from lower section side. By lifting the container above cavern cavity, there performed at the same time is extrusion of backfill water-swelling polymer from container, the granules of which, when connected with well water, form viscoplastic backfill structure at absorbing point. Owing to packer assembly it is possible to deliver backfill material directly to absorption zone.

EFFECT: reducing the time required for elimination of absorptions, and improving the backfilling quality of wells.

2 dwg