SYSTEM AND METHOD FOR EXTRACTION OF FLUID MEDIUM FROM WELL SHAFT Russian patent published in 2014 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: system for extraction of fluid medium from a certain zone of a well shaft includes a single packer. The packer has a structural layer that expands in the well shaft and includes a lot of drain holes in the expansion zone. An inflatable bottle is located inside the structural layer and a sealing layer is located outside the structural layer. Each drain hole interacts with the sealing layer and the drain element. Method for extraction of fluid medium from the certain zone of the well shaft involves the following stages: envelope of the inflatable bottom with the external structural layer; connection of the fluid medium flow control system to multiple drain holes; arrangement of the drain element on each drain hole. The second method for extraction of fluid medium from the certain zone of the well shaft involves the following stages: construction of a single expanding packer with multiple drain holes; lowering of the single expanding packer into the well shaft; expansion of the packer; removal of filtration crust of the drill mud from the well shaft zone; performance of an action of a pump system.

EFFECT: increased expansion degrees and higher pressure drawdown of the well; lower stresses that are otherwise created with a tool holder with a packer as a result of pressure drops.

25 cl, 19 dwg