| 摘要 |
FIELD: mining.SUBSTANCE: packer with a cable entry includes a shaft, compressible annular cuffs mounted on the shaft with a possibility of radial expansion till tight separation of a well cavity, and an anchor. On the outer side of the shaft under the annular cuffs and the anchor there is a longitudinal blind channel for routing of a power cable; with that, under the annular cuffs the cable is tightly arranged in the channel by means of a compound. In the longitudinal channel with a power cable arranged in it, in the section under the annular cuffs, which is sealed with the compound, on the level of the outer surface of the shaft there installed is a protective patch of an arc-shaped profile with a radius of the outer surface, which is equal to half diameter of the shaft, with a possibility of sealing by enclosing the sealing compound with the inner cylindrical surface. On edges of the longitudinal channel on the length of at least unclamped annular cuffs there are projections fixing the position of the protective patch on the level of the outer shaft surface, and being restricted against displacement along the shaft with semi-annular trunnions, the latter are installed in the annular grooves made on the outer surface of the shaft on both sides of the annular cuffs.EFFECT: improving reliable separation of a well cavity.2 dwg |
