Self grease filling deflection-following polished rod sealing device for oil well

• Main Author: ZHAO LIANCHEN
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2020
• Subjects: 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

The invention discloses a self grease filling deflection-following polished rod sealing device for an oil well. The self grease filling deflection-following polished rod sealing device for the oil well comprises a packing body, wherein a left packing and a right packing are respectively arranged inside the two sides of the packing body; packing glands are respectively arranged at end openings of the two sides of the packing body; the outer end of a regulating rod penetrates through a regulating sleeve and the packing glands; the bottom of the packing body is connected with a connecting rod; apolyurethane rod is arranged inside the connecting rod; an extrusion sleeve is arranged at the lower side of the polyurethane rod and is positioned inside the connecting rod; a nylon sleeve is arranged at the inner side of the top of the packing body; and an upper cover is arranged at the upper end of the nylon sleeve. The self grease filling deflection-following polished rod sealing device for the oil well has the advant