Self-expanding plugging device

• Main Author: XI XIAOPING
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2016
• 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 belongs to the field of an oil-field underground tool and especially relates to a self-expanding plugging device. The self-expanding plugging device comprises a central pipe, a rubber drum mounting sleeve and a rubber drum, wherein oil pipe threads are arranged at upper and lower ends of the central pipe; the upper and lower ends of the rubber drum mounting sleeve are welded on the outer side of the central pipe; the rubber drum comprises a fixed rubber drum and a moveable rubber drum which are made from expanding rubber; the fixed rubber drum is vulcanized on the upper section of the rubber drum mounting sleeve; the moveable rubber drum is sleeved on the lower side of the fixed rubber drum; a rubber drum baffle ring is arranged on the lower side of the moveable rubber drum; the rubber drum baffle ring is fixed on the outer side of the rubber drum mounting sleeve through a releasing pin; an anti-retreating ring is arranged at the lower end of the rubber drum mounting sleeve; a releasing sliding