CN105536299A - 井下气液分离装置及其工作方法 - Google Patents
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Abstract
一种井下气液分离装置,包括筒状的本体,所述本体内固装有定位轮。所述定位轮上安装有可旋转的旋流轮,旋流轮设置有螺旋状的轮片,所述定位轮设置有流体通道。所述本体连接有下接头,所述下接头位于本体的内腔中的内端设置有分流接头,所述分流接头中心同轴设置有出气通道,外侧设置有排液通道。所述旋流轮与分流接头之间设有间隔。井下气液分离装置部件数量少,结构简单,成本较低,通过液体通过时带动旋流轮旋转,使液体产生离心力,并在内腔中贴壁旋流,气体中的液体则集中到中心,然后液体和气体分别通过外侧的排液通道和中心的出气通道流出,实现气液分离,使送向马达的液体不含气,避免造成马达损害,提高其使用寿命。
Description
技术领域
本发明涉及油气田井下作业技术领域,具体地说,是一种油气田井下作业中所需的井下气液分离装置。
背景技术
随着分段压裂储层改造技术在非常规油气藏开采中应用越来越广泛,球座、桥塞钻磨作业也急剧增多。钻磨作业中为实现降低作业压力、提高钻屑反排,需要泵注液氮,但液体中含气对底部的马达会造成极大损害,因而目前作业现场都使用气液两相马达来进行作业,但是气液两相马达极为昂贵,增加了作业成本。如果不使用气液两相马达,就需要安装气液分离器,目前的气液分离器结构也较为复杂,成本也较为昂贵,不仅增加了维护难度,也没有降低作业的成本。
发明内容
本发明针对上述现有技术存在的问题,提出了一种井下气液分离装置及其工作方法。
本发明的井下气液分离装置,包括筒状的本体,所述本体内固装有定位轮。
所述定位轮上安装有可旋转的旋流轮,旋流轮设置有螺旋状的轮片,所述定位轮设置有流体通道。
所述本体连接有下接头,所述下接头位于本体的内腔中的内端设置有分流接头,所述分流接头中心同轴设置有出气通道,外侧设置有排液通道。
所述旋流轮与分流接头之间设有间隔。
优选的是,所述的定位轮外侧设置有凸起,所述凸起上间隔设置有导流板,所述流体通道设置有多个,都位于相邻导流板之间。
优选的是,所述凸起为锥台状。
优选的是,所述分流接头外壁与本体内壁之间设有间隔,所述分流接头外壁设置有环形凸缘。
优选的是,所述分流接头为锥台状。
优选的是,所述出气通道外端连接下接头外壁设置的喷嘴,所述喷嘴朝上倾斜。
优选的是,所述本体连接有上接头,所述定位轮固定在本体内壁设置的台阶和上接头内端之间。
优选的是,所述旋流轮与分流接头之间的距离为本体内径的1.5~4倍。
一种井下气液分离装置的工作方法,步骤如下:
1)将本体上端连接连续油管,下接头连接马达;
2)向连续油管内通入泵注液,泵注液进入本体内,通过定位轮的流体通道,然后带动旋流轮旋转;
3)旋转的旋流轮使泵注液形成旋流,并贴着本体内壁向下流动,泵注液中的液体贴壁流动,然后进入排液通道,最后送向马达;泵注液中的气体在本体内腔的中部集中,然后进入出气通道,最后排出到下接头外。
优选的是,气体离开下接头时朝上喷出,带动钻屑向上返排。
本发明的有益效果是:井下气液分离装置部件数量少,结构简单,成本较低,通过液体通过时带动旋流轮旋转,使液体产生离心力,并在内腔中贴壁旋流,气体中的液体则集中到中心,然后液体和气体分别通过外侧的排液通道和中心的出气通道流出,实现气液分离,使送向马达的液体不含气,避免造成马达损害,提高其使用寿命。
定位轮不仅用于固定旋流轮,还设置凸起和导流板,可将液体迅速的分流成多股,使液体流通更加通畅,同时使流经旋流轮的液体更加均匀,旋流轮能够更加轻松的将液体形成旋流,并增强旋流的流速,增强了气液分离作业的效果。
分离出的气体通过喷嘴喷出,喷嘴朝上,使喷出的气体可带动钻屑向上返排,提高井下作业速度。
分流接头设置的环形凸缘使分流接头外壁更加靠近本体内壁,使液体能够完全填充分流接头外壁与本体内壁之间的间隔,将这个间隔密封,避免气体通过这个间隔进入到排液通道中,增强了装置的气密性,保证了气液分离后液体的纯度,防止造成马达损坏,也增强了气体聚集后的气压,使气体能够更加强有力的排出,加快钻屑返排的速度,进一步提高井下作业的速度。
定位轮直接通过连接的上接头压紧固定,便于对定位轮和旋流轮进行拆卸和维护。旋流轮与分流接头之间的距离适中,使分流接头正好处于旋流产生气液分离的最佳位置,保证气液分离的效果。
附图说明
附图1为井下气液分离装置的结构示意图;
附图2为定位轮的结构示意图;
附图3为旋流轮的结构示意图;
附图4为分流接头的结构示意图。
具体实施方式
为了能进一步了解本发明的结构、特征及其它目的,现结合所附较佳实施例详细说明如下,所说明的较佳实施例仅用于说明本发明的技术方案,并非限定本发明。
本发明的具体实施方式如下:
如图1至4所示,该井下气液分离装置包括筒状的本体1,本体1内固装有定位轮2。
定位轮2上安装有可旋转的旋流轮3,旋流轮3设置有螺旋状的轮片8,定位轮2设置有流体通道。
本体1连接有下接头4,下接头4位于本体1的内腔中的内端设置有分流接头5,分流接头5中心同轴设置有出气通道6,外侧设置有排液通道7。
旋流轮3与分流接头5之间设有间隔,这一段本体1的内腔作为气液分离的工作腔。
将本体1上端连接连续油管,下接头连接马达。向连续油管内通入泵注液,泵注液进入本体1内并向下流动,流动的过程中通过定位轮2的流体通道,然后带动旋流轮3高速旋转,高速旋转的旋流轮3使泵注液形成旋流。
在离心力的作用下,泵注液中的液相沿着本体1工作腔的内壁贴壁流动,然后进入分流接头5的排液通道7,最后送向马达;泵注液中的气相则在本体1工作腔的中部集中,然后进入分流接头5的出气通道6,最后排出到下接头4外。
实施例二:
实施例二与实施例一的结构组成基本相同,区别在于:
如图2所示,定位轮2外侧设置有凸起9,凸起9为锥台状,顶部为弧形,更利于将泵注液散开。凸起9上间隔设置有导流板10,流体通道设置有多个,都位于相邻导流板10之间。
泵注液通过定位轮2时,凸起9将泵注液打散,导流板10将泵注液进一步分散,泵注液最终通过导流板10之间的空隙进入到对应的流体通道中,然后离开定位轮2。
实施例三:
实施例三与实施例一的结构组成基本相同,区别在于:
如图4所示,分流接头5为锥台状,分流接头5外壁与本体1内壁之间设有间隔,分流接头5外壁设置有环形凸缘11。
在离心力的作用下,泵注液中的液相沿着本体1工作腔的内壁贴壁流动,然后流入到分流接头5外壁与本体1内壁之间的间隔中,并将间隔完全填充,最后通过环形凸缘11,进入到下方的排液通道7中。泵注液液相的完全填充,将分流接头5外壁与本体1内壁之间的间隔密封,离心作用下留在中部的气体不会渗入和通过排液通道7流出,能够完全进入中心的出气通道6,保证了气液分离后液相的纯度。
实施例四:
实施例四与实施例一的结构组成基本相同,区别在于:
出气通道6外端连接下接头4外壁设置的喷嘴12,喷嘴12朝上倾斜。进入出气通道6的气相最后通过喷嘴12喷出,气相的喷出方向朝上,作用到正在向上排向井外的钻削,使钻削更快的排出,加快井下作业的速度。
实施例五:
实施例五与实施例一的结构组成基本相同,区别在于:
本体1连接有上接头13,定位轮2固定在本体1内壁设置的台阶14和上接头13内端之间。上接头13设置内螺纹,便于连续油管的连接。定位轮2通过上接头13和台阶14的固定,拆下上接头13就可将定位轮2和旋流轮3去除,便于维护和保养。
实施例六:
实施例六与实施例一的结构组成基本相同,区别在于:
旋流轮3与分流接头5之间的距离为本体1内径的1.5~4倍。由于泵注液形成旋流时,泵注液需要流动一定距离,才能使其在离心力的作用下让气相和液相完全分离,并且泵注液如果流动距离过长,已经分离的气相和液相还会再次混合。旋流轮3与分流接头5之间的距离设置使泵注液流动的距离适中,使分流接头5的端部正好位于气相和液相能够完全分离的位置,保证气液分离的效果。
Claims (10)
1.一种井下气液分离装置,其特征在于,包括筒状的本体(1),所述本体(1)内固装有定位轮(2),
所述定位轮(2)上安装有可旋转的旋流轮(3),旋流轮(3)设置有螺旋状的轮片(8),所述定位轮(2)设置有流体通道;
所述本体(1)连接有下接头(4),所述下接头(4)位于本体(1)的内腔中的内端设置有分流接头(5),所述分流接头(5)中心同轴设置有出气通道(6),外侧设置有排液通道(7);
所述旋流轮(3)与分流接头(5)之间设有间隔。
2.根据权利要求1所述的井下气液分离装置,其特征在于,所述的定位轮(2)外侧设置有凸起(9),所述凸起(9)上间隔设置有导流板(10),所述流体通道设置有多个,都位于相邻导流板(10)之间。
3.根据权利要求1或2所述的井下气液分离装置,其特征在于,所述凸起(9)为锥台状。
4.根据权利要求1所述的井下气液分离装置,其特征在于,所述分流接头(5)外壁与本体(1)内壁之间设有间隔,所述分流接头(5)外壁设置有环形凸缘(11)。
5.根据权利要求1或4所述的井下气液分离装置,其特征在于,所述分流接头(5)为锥台状。
6.根据权利要求1所述的井下气液分离装置,其特征在于,所述出气通道(6)外端连接下接头(4)外壁设置的喷嘴(12),所述喷嘴(12)朝上倾斜。
7.根据权利要求1所述的井下气液分离装置,其特征在于,所述本体(1)连接有上接头(13),所述定位轮(2)固定在本体(1)内壁设置的台阶(14)和上接头(13)内端之间。
8.根据权利要求1所述的井下气液分离装置,其特征在于,所述旋流轮(3)与分流接头(5)之间的距离为本体(1)内径的1.5~4倍。
9.一种权利要求1所述井下气液分离装置的工作方法,其特征在于,步骤如下:
1)将本体上端连接连续油管,下接头连接马达;
2)向连续油管内通入泵注液,泵注液进入本体内,通过定位轮的流体通道,然后带动旋流轮旋转;
3)旋转的旋流轮使泵注液形成旋流,并贴着本体内壁向下流动,泵注液中的液体贴壁流动,然后进入排液通道,最后送向马达;泵注液中的气体在本体内腔的中部集中,然后进入出气通道,最后排出到下接头外。
10.根据权利要求1所述井下气液分离装置的工作方法,其特征在于,气体离开下接头时朝上喷出,带动钻屑向上返排。
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