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实用新型
CN202970623U 单向泄油器 失效 - 权利终止

单向泄油器
摘要：
本实用新型专利涉及一种单向泄油器，该单向泄油器主要包括下端连接下接头的筒状主体和插设在所述主体内的剪切器，在所述主体设有泄油孔，所述泄油孔内安装泄油堵头，其中，所述密封套设在所述主体的圆周外侧，所述密封套的轴向下端连接有与下接头外周配合的护套，该护套内设置有与所述密封套下端抵靠的弹性部件，所述密封套将泄油口包置其内并对所述泄油口进行单向封堵。本实用新型结构简单、使用方便、性能可靠，油井正常生产时连在油管上密封可靠，不影响正常抽油生产，作业时能有效泄油，同时能防止管外流体流向管内，防喷性能可靠。
摘要（英）：

The utility model relates to a one-way oil draining device which mainly comprises a cylindrical main body, and a shearing device inserted into the main body, wherein the lower end of the cylindrical main body is connected with a lower connector; an oil draining hole is formed in the main body; an oil draining choke plug is mounted in the oil draining hole; a seal sleeve is arranged on the outer side of the periphery of the main body; the axial lower end of the seal sleeve is connected with a sheath matched with the periphery of the lower connector; an elastic component pushing against the lower end of the seal sleeve is arranged in the sheath; oil draining ports are formed in the seal sleeve in a wrapping manner; and the seal sleeve conducts one-way plugging on the oil draining ports. The one-way oil draining device is simple in structure, convenient to use and reliable in performance, is reliable in seal when being connected with an oil pipe during regular production of an oil well, does not affect normal oil pumping production, can effectively drain oil during operation, can prevent a fluid outside the pipe from flowing inwards the pipe, and is reliable in blowout prevention performance.

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