UNIT OF INFLATABLE PACKER AND METHOD OF DEVELOPMENT OF PACKERS PAIR IN WELL Russian patent published in 2010 - IPC E21B33/12 E21B49/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to packers used during sampling of strata fluid medium and includes method of sampling and device for its implementation. Unit of inflatable packer contains one extensible tubular member with couple of annular dead-end poles, herewith one of supports is movable and the other is fixed on mandrel. Also at this packer it is annular fixing unit, developed from one of dead-end poles for reinforcement of tubular member during creation in it of pressure and its extension. Annular fixing unit contains multitude of plates, pivotally connected to support. Unit can contain the second similar extensible tubular member and the second annular fixing unit. Unit can contain between tubular members centraliser. Movable dead-end pole can allow directed inside surface, area of which increases area of directed outside surface. Method of development of couple of inflatable packers includes creation of pressure in packers, sampling of medium in interpacker space, pressure release for replacement of packers' unit, restriction of packer deformation at stage of pressure creation with usage of annular fixing unit.

EFFECT: reliability growth and increasing of durability of inflatable packers, simplification of process of its pacling and transaportation.

12 cl, 12 dwg