FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to oil and gas industry, in particular to equipment and actions linked with the drilling well. Method includes comparison of the measured pressure in the discharge line with required pressure in the discharge line, and automatic choke control depending on the comparison results, as result difference between measured pressure in the discharge line and required pressure in the discharge line reduces. Pressure control system in discharge line contains controller generating set pressure in annulus based on comparison of the measured pressure in the discharge line with required pressure in the discharge line, and choke automatically controlled depending on specified set pressure in annulus. Well system contains the discharge line connected with drilling string, sensor measuring pressure in the discharge line, and controller generating set pressure in annulus, at least partially based on difference between the measured pressure in the discharge line and required pressure.
EFFECT: increased efficiency of pressure regulation.
20 cl, 4 dwg
