METHOD OF SUSPENDING STEEL POLYMER FLEXIBLE FLUSH-JOINT PIPE IN WELL Russian patent published in 2016 - IPC E21B33/04 E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, particularly to operation of wells at final stage of development, particularly to operation self-killing gas wells. Method for suspension of SPFP in well includes closing master valve of X-mas tree and dismantling of part of X-mas tree, located above master valve, installing suspension assembly and valve, crimping thereof, arrangement of ground equipment, assembly of blowout preventer and injector, filling steel polymer flush-joint flexible pipe (SPFP) into injector, sealer, preventer, opening valve, lowering SPFP until when upper end of SPFP reaches injector, connection of SPFP with crossbar, final lowering and attachment of SPFP in suspension assembly, its crimping, disconnection of crossbar from SPFP, its extraction from well, dismantling injector, seal and unit of preventers, mounting X-mas tree, creation of excess pressure. Upper end of SPFP is connected by means of a sleeve adapter in form of a collet-fitting device, then crossbar is screwed onto coupling adapter and SPFP is mounted in suspension assembly by placing in mounting seat of suspension assembly with rigid securing thereof against axial movement through stop nut of coupling adapter.

EFFECT: technical result consists in prevention of vertical movement of SPFP, as well as possibility of quick disconnection of coupling adapter in form of collet-fitting device from SPFP during change of point of suspension thereof in a repaired well.

1 cl, 4 dwg