Oil well mouth lubrication blowout preventer

• Main Authors: FU QINGLAN, WANG MIN, YANG FANGFANG, GAO LEI, DING JULONG, LIU MEIPING, YANG XIAOSHAN, LI MEIBO, DONG ZHONGKAO
• Format: Patent
• Language: Chinese; English
• Published: 03.04.2020
• Subjects: BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; LUBRICATING; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model belongs to the technical field of oil and gas exploitation, and particularly relates to an oil well mouth lubricating blowout preventer. An oil well mouth lubricating and blowout preventing device comprises a shell, a polish rod penetrating hole is vertically formed in the end of the shell, a cavity in the horizontal direction is formed in the shell, and the cavity is communicated with the polish rod penetrating hole. A sliding ball, a flashboard and a return spring are sequentially arranged in the cavity; the flashboard is located at the communication position of the cavityand the polish rod penetrating hole. The gate valve is mounted on a wellhead packing box cover, after a polish rod penetrates into a polish rod penetrating hole, the sliding ball mounted on the gate plate is in rolling contact with the polish rod, and once the polish rod is broken and disengaged at the wellhead position, the gate plate quickly closes a polish rod penetrating hole channel under theaction of the return spri