油井防喷双流器是具有管柱内防喷,同时又能达到对油水井正、反替,洗、冲、压井等功能的井下工具。结构原理:由上下接头,接箍,承压上部,承压下部,上、下调节器,上、下弹簧等组成。在起下管柱时,承压上部的球阀在弹簧作用下始终坐在承压下部的球座上,起到了密封的作用,实现了管柱 The well blowout preventer is a downhole tool with the function of anti-blowout in the pipe string and positive, reverse, wash, flush and kill of oil and water wells. Structural principle: from the upper and lower joints, coupling, pressure on the lower pressure under the upper and lower regulator, the upper and lower springs and other components. In the lower column, the pressure on the upper part of the ball valve under the action of the spring is always sitting on the ball under the pressure on the seat, played a sealing effect, to achieve the column