Hydraulic manual double-flashboard blowout preventer

• Main Authors: ZHANG JIDE, MA LIANG, HE XIAOLONG, ZHANG XIAOLIN, MAO QIANMING, ZHU JUN, YANG YONGHUA, HU YOUGANG, YU XUFAN, HU ZILONG
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2019
• 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 hydraulic manual double-ram blowout preventer. The shell comprises an upper-layer shell and a lower-layer shell which are parallel to each other, a left flashboard chamber and a right flashboard chamber which are symmetrically distributed are arranged on the two sides of the wellhead channel in each layer of shell; a semi-sealing gate plate block is arranged in each gate plate chamber in the upper-layer shell, each semi-sealing gate plate block is connected with a hydraulic driving mechanism, and each semi-sealing gate plate block can be driven by the corresponding hydraulic driving mechanism to move from the two sides to the middle to block the annular space between the sucker rod and the oil sleeve; a full-sealing gate plate block is arranged in each gate plate chamber of the lower-layer shell, is connected with a manual driving mechanism and can be driven by the manual driving mechanism to move from the two sides to the middle to block the oil production string. Wellhead well