PREVENTER ON THE WELL HYDRAULIC TESTING DEVICE Russian patent published in 2019 - IPC E21B33/03 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry and is intended for the preventer in the well hydraulic testing. Preventer on the well hydraulic testing device includes passing through the preventer body support pipe, two rubber cuffs with a washer between them, support and clamping plates, plug with internal thread, installed in the support pipe rod, designed for the rubber cuffs compression. On the clamping plate upper end there is a cylindrical recess. Novelty is in fact, that the rod is made of a pipe having an external cylindrical thread at both ends. Plug is made with a cylindrical internal thread, wrapped in a cylindrical thread at the rod lower end and fitted with a locking screw. Support plate is located above the rubber cuffs and is press-fitted on the support pipe. At that, the clamping plate is located below the rubber cuffs and is made with a flat upper end. Between the clamping plate and the plug, a made of antifriction material washer is put on the rod. Inside the support pipe from the upper end, a bushing is press-fitted, with a corresponding to the rod thread internal cylindrical thread. Into this bushing the rod upper end with a cylindrical thread is wrapped. From the rod upper end a groove is made. At that, from the groove bottom two radial holes are made, located along the rod diameter.

EFFECT: in the proposed device the design is simplified.

1 cl, 4 dwg