DUAL BORE WELLHEAD EQUIPMENT (VARIANTS) Russian patent published in 2017 - IPC E21B33/47 

FIELD: oil and gas industry.

SUBSTANCE: in one aspect of the invention, there is a dual bore wellhead equipment comprising: a spider (1) consisting of a string branch pipe with a thread in the lower part, an upper mounting flange (2) welded in the upper part, and at least one side branch (3, 4) welded in the middle part; a spider-pipe holder (5) of the first row of tubing pipes made in the form of a disc with two channels, one of which is made with upper and lower threads, wherein the spider-pipe holder (5) is hermetically mounted on the upper mounting flange (2) and is sealed by metal gasket (8). At that a side branch pipe is provided in the spider-pipe holder; the second row of pipe in the pipe holder (10) is made in the form of t-piece with a channel made with upper and lower threads, wherein the pipe holder (10) is hermetically mounted on the spider-tube holder (5) and sealed with metal gasket (9), in this case a side branch is provided in the pipe holder (10).

EFFECT: improved reliability of fittings operation and reduced labour intensity for its installation and disassembly at the well.

24 cl, 2 dwg