FIELD: oil production industry. SUBSTANCE: increased tightness of sealing gland under high pressure is achieved by using flat circular tapered collars installed in sealing gland body with bell mouth towards gas-liquid flow in well. Body of sealing gland is made up of two adjacent sections. End face of upper section is made in the form of pressing nut for compression of sealing stuffing in lower section when replacing collars in upper section. EFFECT: higher efficiency. 2 cl, 1 dwg
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|---|---|---|---|
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