HYDRAULIC JACK UNIT Russian patent published in 2003 - IPC

FIELD: oil-gas producing and geological prospection industries. SUBSTANCE: hydraulic jack unit includes base, two working hydraulic cylinders, connector between working hydraulic cylinder, crosspiece. Hydraulic jack unit is provided with auxiliary hydraulic cylinder, device for regulation of vertical position, centering and rigid fastening of working hydraulic cylinders, thrust plate, removable base connector and two posts. Working hydraulic cylinders are hinged to thrust plate. Crosspiece connects rods of working hydraulic cylinders and serves as carrier of catching mechanism. Posts provides for stable position of working hydraulic cylinders. Connector between bodies of working hydraulic cylinders is removable. Thrust plate of base has two stops for installation of working hydraulic cylinders is removable. Thrust plate of base has two stops for installation of working hydraulic cylinders to transportation position. Auxiliary hydraulic cylinder is hinged to base and fastened with help of clamps to removable connector between bodies of working hydraulic cylinders. Auxiliary hydraulic cylinders from transportation to working hydraulic cylinders from transportation to working position. Thrust plate has cutout for passage of string head in mounting of hydraulic jack unit on wellhead. EFFECT: provided performance of repair operations on wellhead in difficult to access conditions. 3 dwg