EQUIPMENT OF WELL HEAD WITH PARALLEL PIPE SUSPENSION Russian patent published in 2013 - IPC E21B33/03 

FIELD: oil and gas industry.

SUBSTANCE: invention includes a casing flange, a pipe holder of the first row of pipes with a sealing nipple, which is installed with possibility of restricted upward longitudinal movement, a pipe holder of the second row of pipes with side channels interconnected with the corresponding pipes. The casing flange is equipped on the outside with one or several taps interconnected with inner space of the flange and has the possibility of interaction with the pipe holder of the first row, which is equipped with downward external grooves for connection of taps to the well passage of the second pipe string. The pipe holder of the second row of pipes is equipped with a longitudinal hole with a plug, which is not interconnected with pipes; at that, the pipe holder of the first row of pipes is equipped with a channel for connection of that hole to the well. Pipe holders of the first and/or the second row of pipes are equipped from below with process adapters.

EFFECT: simpler design, lower number of process operations at pipe lifting and lowering operations; higher reliability.

4 cl, 3 dwg