HYDRAULICALLY ACTUATED DEVICE FOR SCREWING-ON OF BALL VALVE ON GUSHER WELLHEAD (HADSBVGWH) Russian patent published in 2015 - IPC E21B33/03 E21B33/06 

FIELD: oil and gas industry.

SUBSTANCE: hydraulically actuated device for screwing-on of ball valve on a gusher wellhead HADSBVGWH contains a two-piece clamp, a spreader with a hydraulic cylinder connected to it, a hydromotor with a unit for engaging of a driving gear wheel, a rotation mechanism, a screw with screwed-on ball valve and an installed discharge pipe. For the purpose of safety of the operating personnel the device is fitted with the discharge pipe gushing flow aiming mechanism designed as a two-piece clamp with liners to which by means of pins a spreader with a hydraulic cylinder is fastened. On the spreader the discharge pipe is installed which can move along it for setting, using the nonius fixed on the spreader, the size of rotation radius ensuring tight matching of end faces of the drilling column collar and the discharge pipe after the latter is in a vertical position.

EFFECT: ensuring of safety of operating during works on elimination of gushing from the drilling column of borehole medium containing hydrogen sulphide after ignition of emissions.

7 dwg