FIELD: oil and gas industry.
SUBSTANCE: group of inventions is refered to valves used for well drilling, bottom-hole assemblies and methods for selective actuation of downhole motor. The valve used for drilling of wells comprises a cylinder with inner space of circular cross-section, inlet opening, outlet opening and bypass opening, the first disc with orifice hole mounted in the cylinder so that the disc is rotatable, and the second disc with orifice hole mounted in the cylinder so that this disc is rotatable and pressed towards the first disc for the purpose of selective formation of sealing. The second disc is coupled to the motor rotor, while outlet opening is connected to the motor in order to supply fluid to the motor during its operation.
EFFECT: improved reliability and accuracy of control for the downhole motor operation.
18 cl, 5 dwg
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