WELLHEAD MODULE FOR CEMENTING A CASING STRING IN A WELL Russian patent published in 2022 - IPC E21B33/05 E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular to construction of oil and gas wells, namely to devices for cementing a casing string in a well. Wellhead module for cementing the casing string in the well includes a hollow housing with connecting threads at the ends and with a side channel communicated with an annular groove made opposite, which is covered from the outside by a bushing equipped with a side branch pipe. Housing is made composite, consisting of two stepped upper and lower parts connected to each other by means of a thread. Side channel is made in the upper part of the housing; on both sides of the side channel on the external surface of the upper part of the housing there are annular grooves of a semicircular shape. On the inner surface of the bushing on both sides of the side branch pipe there are annular grooves of a semicircular shape with the possibility of being aligned with the annular grooves of the body and formation of annular channels of a round shape. Radial cylindrical channels are made on the bushing, interconnected with its annular grooves of semicircular shape with the possibility of passage through the above annular channels of round shape of metal balls with formation of ball bearings, which are closed with a plug.

EFFECT: proposed wellhead module has simple design, is efficient in operation due to reduction of labor intensity of erection and dismantling works and provision of possibility of multiple use without replacement of parts, and also increases reliability of operation.

1 cl, 2 dwg