WELLHEAD EQUIPMENT Russian patent published in 2015 - IPC E21B33/47 E21B43/14 E21B49/08 

FIELD: oil and gas industry.

SUBSTANCE: wellhead equipment includes pipe supports of the first and second rows of pipes, a seal nipple of the first row and samplers. The seal nipple is made as a bushing with conical surfaces at ends. In the pipe supports of the first and second rows there are bevelled edges made so that they may interact in a sealed way with the conical surfaces of the seal nipple. Each sampler is made as a hollow blinded cylinder with a piston; it is also equipped with an adjusting device generating counter pressure. The adjusting device may be used as an adjustable valve or as dead weights installed at the piston or cylinder.

EFFECT: simplifying the installation of the seal nipple, improved quality of the taken sample and exclusion of welding operations at the well head for welding of sampling cocks with branches.

4 cl, 2 dwg