Wellhead automatic blowout preventer

• Main Authors: GAO CHONG, ZHOU FANGHAO, ZHENG CAIFANG, ZHOU ZIMENG, ZHOU ZIYAN
• Format: Patent
• Language: Chinese; English
• Published: 20.12.2022
• 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 the technical field of oil field wellhead blowout preventers, in particular to an automatic wellhead blowout preventer which comprises a valve body and a valve ball, a cavity is arranged in the valve body, openings communicated with the outside are arranged on the upper side and the right side of the cavity, the valve ball is mounted in the cavity of the valve body, and a through hole along the motion direction of a polish rod is arranged in the valve ball. A right valve cover is arranged on the outer side of a right opening of the valve body, a valve ball shifting structure is arranged between the valve ball and the right valve cover, the valve ball shifting structure is fixedly connected with the valve ball and rotationally connected with the right valve cover, a sealing ring gland is arranged on an upper opening of the valve body, and a polished rod sequentially penetrates through the sealing ring gland, the valve ball and the lower end of the valve body. According to the utili