METHOD FOR ELIMINATING OPEN FLOWS IN OIL AND GAS WELLS, AND DEVICE FOR DEMOUNTING WELL-CONTROL EQUIPMENT FROM FLOWING WELLHEAD

摘要

FIELD: oil and gas industry.;SUBSTANCE: metal works and well-control equipment are demounted in the territory surrounding a flowing wellhead within the flame exposure. The blowout equipment and bypass pipe assembly constructed in the flowing wellhead. A wellhead tackle and rope slings are washed with a coolant fluid. The flame is carried off through the bypass pipe at a safe height, and the well is killed. The well-control equipment is demounted from the flowing wellhead by plasma arc cutting by means of guided and freely movable vertically and horizontally neck having a supported cutting burner with a graphite electrode at the end. The hole is mounted on a screening baffle plate placed on a travelling sledge movable both vertically and horizontally in relation to the flowing wellhead.;EFFECT: higher reliability, higher safety and acceleration of demounting the well-control equipment.;2 cl, 1 dwg