Swabbing and blowout-prevention device for oil field

• Main Authors: YAN DEXI, LI XIZENG, XU XIAOLIANG, WANG YUNWEI, XU YUANXIN, SONG WEIDONG, WANG PANQIANG
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2010
• 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 discloses a swabbing and blowout-prevention device for an oil field, which comprises a shell body. The upper end and the lower end of the shell body are respectively provided with an upper connecting hub and a lower connecting hub; the core part of the shell body is provided with a vertical through hole; the upper part of the shell body is provided with an upper sealing device used for sealing an oil-pushing rod; and the lower part of the shell body is provided with a lower sealing device used for sealing the space of an oil pipe. When the swabbing and blowout-prevention device is used for conducting construction of tripping a pumping rod during well repair operation in the oil field, the shell body is installed on a top joint at the wellhead by the upper connecting hub and the lower connecting hub, the pumping rod twitches up and down in the through hole to work and the through hole becomes an oil pipe channel. If the pumping rod is positioned in the through hole at the core part of the she