机械式井下开关

Mechanical downhole switch

Abstract

The utility model relates to a mechanical downhole switch used for oil field well test production testing. An outer cylinder (11) is connected with the position between an upper and a lower single flow valves (3, 16) through a joint (8), and the joint (8) is connected with an inner cylinder (10) which extends to the lower single flow valve (16) in the outer cylinder (11). The tail end of the inner cylinder (10) is connected with a desilting cylinder (13) of which the tail end is provided with a plug (14). The upper part of the inner cylinder (10) is lined with a sliding bush (9), and preload spring columns (12) are arranged between the sliding bush (9) and both end surfaces of the desilting cylinder (13). Sealing glands are arranged among the joint (8), the outer cylinder (11) and the inner cylinder (10) and between the inner cylinder (10) and the sliding bush (9). A flow guiding ring cavity (19) which is communicated with the inner cavity of the lower single flow valve (16) is formed between the outer and the inner cylinders (11, 10), and the ring cavity is communicated with the inner cavity through a side hole (20) on the inner cylinder (10). In the process of implementing downhole switching, the procedure is easy. The switching action can be accomplished in a short time only falling or lifting a down-hole pumping rod.
本实用新型涉及一种油田井试采测试的机械式井下开关。它在上、下单流阀(3,16)之间通过接头(8)连接外筒(11),在外筒(11)里于接头(8)上连接伸向下单流阀(16)的内筒(10),内筒(10)末端连接沉砂筒(13),筒(13)末端装有丝堵(14);内筒(10)上部衬有滑套(9),滑套(9)与沉砂筒(13)二端面之间装有预紧弹簧柱(12);接头(8)与外筒(11)、内筒(10)及内筒(10)与滑套(9)之间都装密封盘根;外、内筒(11,10)之间形成与下单流阀(16)内腔连通的导流环腔(19),该环腔通过内筒(10)上旁孔(20)与内腔连通。在实施井下开关过程中程序简便,只下放或上提井下抽油杆在较短时间内便完成开关动作。

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