DEVICE AND METHOD FOR WELLHEAD SEALING Russian patent published in 2017 - IPC E21B33/02 

FIELD: oil industry.

SUBSTANCE: invention relates to oil and gas industry, particularly, to device for sealing wellhead of oil and gas wells at RWR SAP in construction and repair for preventing showings of oil-gas and water. Device for wellhead sealing comprises a hollow body consisting of two detachable parts, which are in opened position before sealing. Upper part of body has on its upper end a plug, connected via an adapter with upper coupling, and at lower end a hinge, above which there is an upper quick-release connection with internal thread. Lower part of body has on its lower end is connected through lower coupling a pipe with side a branch, and on upper end - a device for coupling-uncoupling rods (PSRS), above which there is a lower quick-release connection with external thread. Upper and lower quick-release connection, as well as PSRS and hinge are configured for fixation to each other to form two sealing assemblies, wherein connection of PSRS with hinge during sealing is installed inside connection assembly of quick-release connection.

EFFECT: technical result consists in improvement of efficiency and faster wellhead sealing at RWR rod string.

17 cl, 1 dwg