Cylindrical well plugging device

• Main Authors: REN QINGSHENG, FU XIUMING
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2011
• 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 utility model relates to a well plugging device for oil field drilling, oil extraction and workover treatment well head control, in particular to a cylindrical well plugging device consisting of a shell, a cylindrical valve body assembly and an actuating mechanism. When needing to seal the well, under the driving of the actuating mechanism, the differential mechanism of the cylindrical valve body assembly of the well plugging device is led to form a metal closed cavity containing a rubber valve plug when being contacted with the tubular column surface in the well, and the rubber valve plug is compression-deformed to fill the sealing clearance of the metal cavity so as to play the role in sealing the well; when needing to open the well, under the pull-back action of the manual or hydraulic actuating mechanism of the well plugging device, the cylindrical valve body assembly firstly stops the compression on the rubber valve plug to enable the rubber valve plug to recover, then the cylindrical valve body retu