FIELD: oil and gas extractive industry, namely, equipment for completion and operation of wells, including that for wells without advance stopping thereof.
SUBSTANCE: cutoff valve contains body with sub on lower end. Positioned in internal hollow of body with sub on lower end are rod, collet, adjusting nut, guiding bushing, plate, saddle and spring. Cutoff valve is provided with stop bushing, pusher bushing with circular fillet on external surface and stop nut. Spring is positioned in circular hollow between pusher bushing and sub. Spring interacts with circular collet of pusher bushing and stopping nut. Stop bushing is positioned in circular hollow between pusher bushing, saddle and body.
EFFECT: increased reliability and lifetime of cutoff valve, increased recovery for product wells.
1 dwg
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RU2045657C1 |
