FIELD: oil producing industry. SUBSTANCE: invention relates to equipment used at pumping out well fluid for sealing of wellhead in which sucker- rod is operating. Proposed sealing device has housing, stuffing box seal unit installed in housing for cross displacement, with its pressure bushings telescoping one into the other. Locking seal is made selfsealing. Bearing bushings are installed in support sleeves with clearance in which elastic rings-dampers are fitted. As stuffing material wears, plate spring pressing the stiffing material provides adequate sealing. Spaces found over and under locking seals are placed in communication through high pressure valve. EFFECT: reduced service expenses, provision of normal ecological conditions. 1 dwg
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|---|---|---|---|
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|
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