HORIZONTAL WELLS PACKER Russian patent published in 2017 - IPC E21B33/12 

FIELD: mining.

SUBSTANCE: horizontal wells packer comprises a hollow barrel with a pressure regulator at the bottom, sealing elements installed on the barrel with upper, lower and intermediate stops, a movable hydraulic cylinder located there beneath on the barrel with a piston which is equipped with a pusher configured to interact with a lower stop, the upper stop is connected to the barrel to enable movement towards the lower stop with compression sealing elements under the operation of the piston with the hydraulic cylinder, a cavity of which is cooncted to the cavity of the barrel through the radial channel. The piston lifter has an annular form, rests on the lower stop and is equipped inside with one or more pins. The pressure regulator is made in the form of a check-valve. There is an annular projection with the outer longitudinal alternating long and short recesses between the lower stop and the piston on the barrel, which are connected with shaped grooves for the pins lifter. The shaped grooves enable the pins to arrange subsequently under reciprocating movement of the lifter: in the long longitudinal grooves - a transport position, in short longitudinal grooves - a working position after compression of the sealing elements. The upper stop is connected to the barrel via an adjusting sleeve whose thickness is depends on the nominal diameter of the well barrel.

EFFECT: improving reliable operation in the horizontal section of the well.

3 cl, 2 dwg