DEVICE FOR HERMETIC SEALING OF UNITS OF DOWN-HOLE LOGGING INSTRUMENTS Russian patent published in 2002 - IPC

FIELD: examination of wells. SUBSTANCE: device is intended for hermetic sealing of units of instruments while joining them to cable-carrying cable. Device includes inflexible guarding enclosure in the form of cylinder having internal location and threaded surfaces and threaded bushing for joining to enclosure. Head is mounted with clearance in enclosure. Threaded bushing fixed against axial displacement and rubber sealing ring are put in groove of head. Device is equipped with high-strength sleeves and flat rings installed between them over which elastic hose impenetrable for washing fluid with location sleeves on its ends on outside is pulled over them. Location sleeves and hose are located inside enclosure. One or several holes to transfer hydrostatic pressure on outer surface of hose are made in enclosure. EFFECT: enhanced operational reliability of instruments working under increased temperature and pressure. 4 cl, 1 dwg