The utility model relates to a multi-purpose single flow valve, which comprises an upper main body, a lower main body, a central pipe, an annular piston, a spring and a sealing ring. The side wall of the upper main body is circumferentially provided with a plurality of liquid through holes, the upper main body and the lower main body are connected by threads, the external threads of the central pipe are connected on the inner side of the upper main body, and the annular piston and the spring are arranged in a cavity between the upper main body and the central pipe, A spring is arranged on the annular piston, and the outer circumference of the annular piston is provided with a sealing ring. Beneficial effect: the utility model provides a multi-purpose single flow valve connected to the screw pump tubing string, which can make the well flushing fluid injected into the wellhead enter the pumping tubing string on the pump during well flushing; the single flow valve retains the center longitudinal channel, so as to facilitate the pumping tubing string and the screw pump rotor to pass through the center longitudinal channel; the single flow valve is used in the layered oil production well, which can be used in multiple stages, and the starting pressure is based on the It needs to be adjustable, and the opening and closing ports of single flow valve are hard sealed, impact resistant and long service life.
【技术实现步骤摘要】
多用途单流阀
本技术涉及油田采油领域所用的井下工具,尤其涉及一种多用途单流阀。
技术介绍
在油井生产过程中,为实现流体的单向流动,在很多情况下需在井下管柱上使用单流阀;例如定期向井内注入热水洗井清蜡,为不使热洗水灌入油层,须用封隔器把油层隔开,并在管柱上对应油层部位使用单流阀,使注入的水不能进入油层,但生产时油层产出液可经单流阀流出;有的管柱在作业施工时需打压释放封隔器,在管柱进液通道上就需使用单流阀,在管柱内加压释放封隔器时使管柱形成一个封闭系统;而螺杆泵井热洗时也需要在泵上进液,也需要有单流阀。
技术实现思路
本技术所要解决的技术问题是提供一种多用途单流阀,该阀在自然状态下关闭,而当管外压力高于管内压力时则开启,因而可使井液实现单向流动。本技术通过以下技术方案来实现:一种多用途单流阀,包括上主体,下主体,中心管,环形活塞,弹簧,密封圈组成,所述的上主体的侧壁周向设有若干通液孔,上主体与下主体以螺纹连接,中心管以外螺纹连接在上主体的内侧,环形活塞和弹簧置于上主体和中心管之间的空腔内,环形活塞上为弹簧,环形活塞的外周设有密封圈。进一步的,所述的上主体上端和下主体的下端均设有油管扣。本技术的有益效果:本技术提出的一种多用途单流阀连接在螺杆泵抽油管柱上能在洗井时令井口注入的洗井液在泵上进入抽油管柱,单流阀保留了中心纵向通道,以便于抽油管柱和螺杆泵转子从中心纵向通道通过;单流阀用在分层采油井中,可多级使用,启动压力根据需要可调,且单流阀的开合口为硬密封,耐冲击,寿命长。< ...
【技术保护点】
1.一种多用途单流阀,包括上主体(1),下主体(2),中心管(3),环形活塞(4),弹簧(5),密封圈(6)组成,其特征在于:所述的上主体(1)的侧壁周向设有若干通液孔,上主体(1)与下主体(2)以螺纹连接,中心管(3)以外螺纹连接在上主体(1)的内侧,环形活塞(4)和弹簧(5)置于上主体(1)和中心管(3)之间的空腔内,环形活塞(4)上为弹簧(5),环形活塞(4)的外周设有密封圈(6)。/n
【技术特征摘要】
1.一种多用途单流阀,包括上主体(1),下主体(2),中心管(3),环形活塞(4),弹簧(5),密封圈(6)组成,其特征在于:所述的上主体(1)的侧壁周向设有若干通液孔,上主体(1)与下主体(2)以螺纹连接,中心管(3)以外螺纹连接在上主体(1)的内侧,环形活...
【专利技术属性】
技术研发人员:禹栽星,苗久厂,石莹,黄金,杨坤,张卫平,李青,
申请(专利权)人:大庆中科激光完井技术服务有限公司,
类型:新型
国别省市:黑龙;23
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