KELLY SEALANT ON WELLHEAD WITH PERCEPTION OF REACTIVE TORQUE FROM TURBODRILL ROTATION Russian patent published in 2017 - IPC E21B33/02 E21B33/03 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to equipment for wellhead sealing during drilling by turbine method. The device comprises a housing with an upper base and a lower flange. The through axial passage of the housing has an insert. The insert comrpises a sealing unit consisting of a clamp, a support, and a sealing cup between them, all are joined by studs and nuts. The insert consists of two halves with diametrical slot, which are pivotally joined to each other, and in the closed position are fixed with the latch. The clamp, the support and the cup have a central square hole. The insert fixing assembly in the housing is designed as movable slides with a screw drive arranged in upper radial holes in the base. The insert fixing assembly (to avoid rotation in the housing) is implemented in the form of two support shoulders arranged on the conical clamping surface and interacting with the sliders. The upper base of the housing is designed as a flange with holes for studs and with the circular groove for the sealing ring.

EFFECT: invention provides improved reliability, safety and ease of use, decreased complexity and time-consumption, as well as increased operational capabilities.

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