Abstract
FIELD: oil and gas industry.SUBSTANCE: invention relates to the oil and gas industry, in particular to the repair of wells. Wellhead hydraulic jack includes vertical power cylinders equipped with fittings for supplying working fluid to the cylinder cavity, pistons inserted into cylinders with rods, upper and lower bases, which are rigidly connected to the corresponding cylinders and rods, upper and lower clamps. Rods are pointing down and connected to the lower base, and the cylinders, worn on top of the pistons upside down, with the upper base. From the bottom of the lower base, levers can be pivotally mounted with corresponding pivotally fixed horseshoe-shaped supports, interconnected with the possibility of coverage in the working position of the production string of the well, while the lower grip is installed on top of the wellhead flange. Horseshoe abutments can be equipped from the inside with interchangeable liners to ensure that the production string of a different diameter can be reached in the working position.EFFECT: proposed hydraulic jack has a simple design, due to the low placement of the upper grip makes it easy to work with it; thanks to its stop in the wellhead coupling, it allows to tear off the “stuck” pipe holder from the wellhead flange together with the pipe string.1 cl, 1 dwg
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