TUBING STRING PRESSURING DEVICE Russian patent published in 2010 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: device includes a cylindrical case with a sealing element and a parachute-centraliser and a seat, executed with an ability of the sealed element and the seat hermetic interaction. The seat executed as a pump lock support. The sealing element executed with an external cone part, replying to the pump support lock cone part, and an internal cone part, having coning direction opposite to a coning direction of the external cone part. The case has top cylindrical part and bottom cone part, located inside of the sealing elements internal cone part. The sealing element internal cone part and the case bottom cone part executed with a possibility of hermetic interaction. The parachute-centraliser is a barrel shaped, fixed on the case top cylindrical part with the barrel walls directed to the bottom. The barrel walls have holes. A share pin located in the case top cylindrical part flush to the sealing element.

EFFECT: device allows to simplify design and decrease technology operation time during operation, cast cutting.

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