COIL TUBING ASSEMBLY FOR REPAIR AND MAINTENANCE OF HYDROCARBON RAW MATERIAL WELLS Russian patent published in 2020 - IPC E21B19/22 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas production industry and is intended for underground repair, geophysical and thermohydrodynamic investigations of oil, gas, gas condensate and other vertical wells, inclined wells and wells with horizontal sections of the profile using a flexible pipe and for performance of downhole works – fishing operations, installation and removal of packers, cutoff valves, installation and removal of cement bridges, restoration of circulation and killing of well, hydraulic perforation of casing strings, washing, removal of hydrate and paraffin plugs, perforating and other works. Coil tubing unit for repair and maintenance of wells of hydrocarbon raw material contains transport base, operator's cabin with control system, located on transport base, drum with drive, intended for arrangement of flexible pipe and installed on transport base, flexible tube laying on the drum, injector with traction chains installed on the guide sprockets, at that, the clamps are located on the chains, and before the injector inlet the guide device is installed, the injector drive, sealing and anti-blowout equipment made with possibility of connection to production wellhead installed above the well mouth. Unit is designed so that to enable installation and application of the drum either with the all-metal pipe or the drum with steel-polymer pipe. Injector of unit is configured to replace traction chains for all-metal pipes on traction chains for steel polymer pipes and back, mainly by replacing the entire injector, preferably with simultaneous change in the number and / or shape of hold-down pads. Traction chains are installed with the possibility of changing the distance between two adjacent diametrically opposite blocks for passage of the pipe tip of larger diameter than the pipe by changing the distance between the chain branches.

EFFECT: technical result consists in expansion of the unit functional capabilities.

5 cl, 8 dwg