Sealing unit for sealing packer cushion, has rubber hose connected with its ends at body wall by applying negative pressure at inlet, where rubber hose is tightly attached to feed tube by applying compressed air at inlet

摘要

The sealing unit has a body (2) provided with a drilling, and an inlet radially flowing into the drilling. A rubber hose (4) is connected with its ends at a wall of the body by applying negative pressure at the inlet. The rubber hose is tightly attached to a feed tube, which is guided into the drilling, by applying compressed air at the inlet. The ends of the rubber hose are transacted outwardly for fastening at the body.