FIELD: oil gas producing industry; applicable in underground repairs and investigations of wells. SUBSTANCE: subsurface safety valve includes body in which piston is engageable with lock. Valve has seat and ball. Pistons is connected with rod. Subsurface safety valve is provided additionally with lock of valve open position located in upper part for engagement with valve ball. Lock is located with clearance relative to ball surface in closed position of valve. Hydraulic channels communicating spaces of wells are separated by packers and regulated by piston motion. EFFECT: higher reliability of well shutoff, provided possibility of well operation with low production rate. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WELL HARROW VALVE | 2002 |
|
RU2227205C2 |
| GATE-TYPE WELL VALVE | 2002 |
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| DEVICE FOR TREATMENT OF BED | 1998 |
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| SUBSURFACE SAFETY VALVE | 1997 |
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| HYDRODYNAMIC PULSED-PRESSURE GENERATOR | 2002 |
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| CENTERING MOUNT | 1999 |
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| MECHANICAL PACKER | 2023 |
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| DRILLABLE PACKER | 2011 |
|
RU2483192C1 |
