REMOVABLE TWIN-CHOKE REGULATOR Russian patent published in 2005 - IPC

FIELD: oil production industry, particularly to regulate and/or measure flow parameters.

SUBSTANCE: regulator comprises body with outer groove, side pass channels and axial connecting channel, lower and upper collar holders with outer packing members, fishing head and tail piece with fixer. Fishing head has side pass channels and/or through axial connecting channel. The body or lower and upper collar holders and/or fishing head and/or tail piece have inner landing seats for receiving locks or have borings. Removable restrictors are installed at least in two borings and have opposite direction. The restrictors have equal or different pass and/or outer diameters and may have free or spring-loaded back valves performing restricted movement. Summary flow area of removable restrictors is less than that of side pass channels of the body.

EFFECT: increased efficiency of output and/or pressure well formation operation due to increased regulator cross-section along with limited size thereof, extended range or pressure and flow regulation during fluid extraction and/or working substance pumping-in.

18 cl, 9 dwg