| 摘要 |
FIELD: oil and gas industry; downhole valving devices. SUBSTANCE: valve has body with through passage accommodating locking unit in the form of shutter with rotation axle. Body is provided with lateral and longitudinal slots. shutter is made with spherical outer surface, has additional axle of rotation and brackets which carry aforesaid axles made in the form of two pairs of cylindrical protrusions. One pair of protrusions passes through the center of shutter spherical surface, located in longitudinal slots of valve body and spring-loaded relative to body, and other pair is seated in lateral slots of body. EFFECT: higher operating reliability. |
