LINER FOR WATER-ENCROACHED PRODUCING WELL

摘要

FIELD: oil producing industry, particularly, means for protection of formation reservoir properties. SUBSTANCE: liner has packer and plugged from bottom pipe string with check valve. Packer is made of two oppositely directed self-sealing packings. Check valve is made in form of hole in liner lower part and additional self- sealing packing installed with its funnel downward. In upper part of liner, but below packings, hole may be made which is closed with slide valve having float with positive buoyancy in oil. EFFECT: simplified design of liner and technology of its operation. 2 cl, 3 dwg