STEAM INJECTION WELL Russian patent published in 2019 - IPC E21B43/24 E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular, to development of viscous oil or bitumen deposits during steam-thermal action on formation through injection horizontal bores. Steam-injection well is equipped with filtering elements with a shank located inside, broken into sections equipped with perforated holes at each section. Filtration elements fitted on shank sections with perforated holes are slot-like in the form of cylindrical spiral made of high-precision V-shaped profile creating rigid screen with annular slits with size from 50 to 1,000 mcm and with allowance for slit width up to 15 mcm. Perforated holes are made with taper countersink to widen the area of steam impact on the slotted grid of the filter elements. To ensure the same amount of steam heat released at each section of the shank creating the conditions for uniform heating of the oil-containing formation throughout the entire area of the production well location, the number of perforations is increased at each section as far as from the wellhead.

EFFECT: higher efficiency of formation heating.

1 cl, 3 dwg