DEVICE FOR SEALING WELL MOUTH

FIELD: well maintenance technology. ^ SUBSTANCE: device has body with cover, force cylinder with hollow rod placed in the body and with piston, which separates cylinder on proximate and remote working hollows and compactor placed in body hollow between cover and hollow rod. Hollow rod is provided wi...

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Bibliographische Detailangaben
Hauptverfasser:	MOLCHANOV A.G, SHVAREV R.JA, MOGIL'NIKOV O.V
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	FIELD: well maintenance technology. ^ SUBSTANCE: device has body with cover, force cylinder with hollow rod placed in the body and with piston, which separates cylinder on proximate and remote working hollows and compactor placed in body hollow between cover and hollow rod. Hollow rod is provided with longitudinal plungers mounted in through apertures made in this rod, which connect remote working hollow of force cylinder and body hollow, in which compactor is placed. Longitudinal plungers are provided with limiters of their displacement in direction opposite to compactor. Longitudinal plungers are made with capability for extending from through apertures of hollow rod. In current given variant limiters are made in form of ring-shaped plungers shelves. Longitudinal plungers, while extending, push out worn compactor from body for replacement with new. ^ EFFECT: lesser axial dimensions of sealing device. ^ 1 dwg