FIELD: oil and gas industry, particularly devices included in pressure pipe string and adapted for pipe string connection inside well, as well as for well operation and pullout, for thick bridge arranging under high pressure.
SUBSTANCE: connection has clutch and nipple with collet clamp located in lower end thereof. Clutch and nipple are fixed by mutual engaging between groove and extension. Clutch is of cylindrical shape. Nipple has thread to secure the connection to pressure pipe string and comprises sealing member. Liner is connected to lower clutch part by threaded connection. Arranged in lower nipple part is sliding safety bush having seat for ball valve. The connection is provided with pin, which transmits twisting moment to liner, with tension nut for nipple fixation relative clutch body, with shear ring and with sealing member for fixing and sealing sliding bush relative working part of collet clamp of the nipple.
EFFECT: extended range of connection capabilities and increased reliability thereof.
2 dwg, 2 ex
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