| 摘要 |
FIELD: oil and gas industry, particularly for increasing oil bed productivity by pumping pressurized liquid, gas or gas-and-liquid mixtures into beds. ^ SUBSTANCE: device comprises hollow body with ring groove and row of radial orifices, collars, cylinder, cone and stop sleeve with orifice made in sleeve wall. Stop sleeve and body define annular cavity. Device also has ratchet, retaining ring, threading die, stock for threading die, coupling, seat with ball, cams and shear pins. Spring-loaded bushing is arranged in annular cavity between body and stop sleeve. Additional rows of radial orifices are formed in body above bushing. Radial orifices proximal to bushing have diameters not exceeding 0.8 mm. ^ EFFECT: increased reliability and operational capabilities. ^ 3 dwg |
