FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry and can be implemented for well casing and additional suspended strings in wells with defects of leakproofness of production well and also for sealing tubular space. The holder contains a case, and a cylinder bushing installed therein, designed to axial displacement and divided with a horizontal partition. At the lower end of the bushing pushers are assembled resting on the end of the piston located above a telescopic cone and a telescopic collet with die-heads. The invention facilitates performing two functions: sealing tube space and suspending lowered string on holder at repair works allowing lowering sunk string of smaller diameter. There is achieved increased reliability of device due to cylinder bushing with exterior diameter equal to diameter of tube space.
EFFECT: increased reliability of device due to cylinder bushing with exterior diameter equal to diameter of tube space.
2 dwg
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RU2745147C1 |
