| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: mechanical support packer with cable entry comprises a mandrel connected telescopically to a connecting coupling and a landing nipple interacting by its collars and locking pins with longitudinal grooves made in the mandrel, which can move axially among themselves. The packer is equipped with O-ring with dish-shaped thrusts divided by intermediate rings and entry of a power cable through a longitudinal closed slot at the mandrel with joint sealant under the O-ring. At both sides of the O-ring there are mirroring identical bushings made with the respective dish-shaped upper and lower thrusts intended to compress the O-ring and these thrusts are connected to the coupling and nipple and fixed by retention screws. At inner surfaces of the bushings there are longitudinal grooves while in walls of the coupling and nipple there are through grooves for free movement and output of the power cable when the O-ring is compressed. At both mandrel ends in the circular grooves there are limit stops for the coupling and nipple made as pairs of semiannular dies covering the power cable by their butt ends and interlocked from outside by stages in inner surfaces of the coupling and nipple, which are made with length at least equal to offset value of each thrust at compression of the O-ring with radial expansion up to tight-proof disintegration of the well cavity. In the bushings there are shear pins interacting with circular grooves in the mandrel thus providing free placement of the O-ring between dish-shaped thrusts when the packed is run in to the well up to the thrust into the device installed below.EFFECT: improving fabricability and tight-proof setting of the packer in the well.4 cl, 1 dwg |
