CN201507271U - 自动控制连续批量混浆橇 - Google Patents
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Abstract
一种自动控制连续批量混浆橇,涉及一种用于油田固井作业中混配水泥浆的设备,解决批量混浆效率较为低下以及连续配浆密度波动的问题,实现高效率地自动连续批量混配密度稳定的水泥浆。包括混浆系统、动力系统、液压系统、气路系统、电控系统、仪表控制台,清水流量计后连接高能混合器的喷射水枪,混浆罐的排出口连接到循环离心泵的吸入口,循环离心泵的排出口其中一路又分为两路,一路经由密度计连接到混浆罐,一路连接到高能混合器;批混罐装有喷射混合器和搅拌器,循环离心泵的排出口其中一路分开后再增加一路,连接到批混罐,批混罐设置有一个排出口与灌注离心泵的吸入口连接,灌注离心泵的排出口其中一路连接到喷射混合器。
Description
技术领域
本实用新型涉及一种用于油田固井作业中混配水泥浆的设备,特别是涉及一种自动控制连续批量混浆橇。
背景技术
近年来,油田固井作业的要求越来越高,固井作业需要混配的水泥浆密度要求也越来越高,目前油田广泛使用的水泥浆混配方式包括批量混浆和连续配浆两种方式。
批量混浆,由于所配水泥浆密度波动较小,所以在一些要求较高的固井作业中必不可少,但是效率较为低下,在水泥浆需求较大的情况下不能保证供给,油田的解决方案往往是多台批混设备梯队作业,人力物力耗费较大。
连续配浆方式效率较高,能保证水泥浆的连续供给。其关键部件是下灰阀和高能混合器,通过调节下灰阀的开度可以调节干水泥的供给量,高能混合器是通过高速射流的水形成的负压将干水泥带入混浆罐进行搅拌。目前的连续配浆方式包括自动和手动两种,但是无论自动配浆还是手动配浆,其混配的水泥浆密度总是会出现波动,造成水泥浆密度波动的原因是多方面的,包括下灰阀的反应速度,密度计的测量精度,供灰车的气泵压力波动等等。到目前为止,连续配浆的密度波动问题一直没有很好解决。
实用新型内容
本实用新型的目的是提供一种自动控制连续批量混浆橇,解决批量混浆效率较为低下以及连续配浆密度波动的问题,通过自动连续配浆与批量混浆结合的方式,在保留批量混浆密度精确优点的同时实现了连续配浆功能,能够高效率地自动连续批量混配密度稳定的水泥浆。
本实用新型通过以下技术方案来实现上述目的:一种自动控制连续批量混浆橇,包括混浆系统、动力系统、液压系统、气路系统、电控系统、仪表控制台,其中混浆系统进一步包括混浆罐、清水离心泵、循环离心泵、灌注离心泵,清水流量计后连接到高能混合器的喷射水枪,混浆罐的排出口连接到循环离心泵的吸入口,循环离心泵的排出口其中一路又分为两路,一路经由密度计连接到混浆罐,一路连接到高能混合器;混浆系统还包括批混罐,批混罐装有喷射混合器和搅拌器,循环离心泵的排出口其中一路分开后再增加一路,连接到批混罐,批混罐设置有一个排出口与灌注离心泵的吸入口连接,灌注离心泵的排出口其中一路连接到喷射混合器。
本实用新型与现有技术比较所具有的有益效果是:
1、本实用新型的最大特点是自动连续批量混浆功能:将混浆罐和批混罐进行有机结合,通过在传统自动连续配浆设备的循环管汇上旁通一个出口到批混罐,混浆作业时根据混浆罐内的液面高度确定此旁通口蝶阀的开度,只要保证混浆罐内的液面适中即可,这样注入到批混罐内的水泥浆密度虽有小幅波动,但是大容量的批混罐可以将此密度波动均衡,得到密度单一的水泥浆,这样就实现了自动连续批量混浆的功能,能够满足不少于8小时的连续作业,混浆效率高且得到的水泥浆密度稳定。
2、本实用新型避免了传统批量混浆设备作业中反复拆装排出管线的问题,减少了相同设备的使用数量,使固井作业时各类设备的空间排布更加合理,从而节约了固井作业的成本。
附图说明
图1是本实用新型的结构示意图。
图2是本实用新型的管汇原理图。
具体实施方式
下面结合说明书附图通过实施例对本实用新型作进一步的描述:
参见附图,一种自动控制连续批量混浆橇,包括混浆系统、动力系统11、液压系统14、气路系统12、电控系统8、仪表控制台7,其中混浆系统进一步包括混浆罐6、清水离心泵28、循环离心泵27、灌注离心泵26以及在混浆罐6与灌注离心泵26之间起均衡作用的批混罐1;清水离心泵28吸入口与计量水罐9连接,清水离心泵28的排出口经由过滤器29后连接到清水流量计23,中间旁通清洗水枪17,清水流量计23后连接到高能混合器5的喷射水枪;混浆罐6上部装有搅拌器,混浆罐6上的扩散箱上装有高能混合器5,高能混合器5进口上装有下灰阀16,混浆罐6的排出口连接到循环离心泵27的吸入口;循环离心泵27的排出口其中一路经过蝶阀22以后分为三路,一路由蝶阀18控制经由密度计24连接到混浆罐6顶部,一路由蝶阀19控制连接到批混罐1顶部,另一路由蝶阀20控制连接到高能混合器5;批混罐1顶部装有喷射混合器25和搅拌器3,批混罐1底部设置有一个排出口与灌注离心泵26的吸入口连接,灌注离心泵26的排出口其中一路连接到喷射混合器25。橇架为整体式结构,底座10、保护架2、批混罐1定位以后焊装在一起,可充分利用整橇的宽度与长度尺寸,增大批混罐1的容积;底座10两端船头位置各设置无缝钢管,油田作业进行现场摆布过程中,可拖动无缝钢管将整橇摆布在合适的位置;批混罐1罐顶装有可折叠式护栏15,护栏15与保护架2采用抽插式的铰链连接,运输过程为避免超高,可将护栏放倒,作业时再扶起,确保作业安全;控制平台13至上平台4设置扶梯。
通过混浆系统操作屏,预设完自动混浆的各项参数以后,首先开启清水离心泵28建立清水流量,给高能混合器5提供水源。外部供灰车中的干灰通过下灰阀16的加灰口进入高能混合器5,高能混合器5能将干灰和水进行充分混合,扩散箱能将干灰中的空气除去。打开蝶阀18、蝶阀20,开启循环离心泵27,在高能混合器5和混浆罐6内建立水泥浆循环,此时蝶阀19处于关闭状态。当密度计24显示的水泥浆密度接近预设值以后,将蝶阀19半开,循环离心泵27在对混浆罐6进行水泥浆循环的同时,将部分水泥浆泵入批混罐1内进行均衡。开启灌注离心泵26,在喷射混合器25和批混罐1内建立水泥浆循环,批混罐1顶部安装的两台大功率的采用双层叶片的搅拌器3,可以增强混浆效果,防止水泥浆沉降、结块。通过喷射混合器25向批混罐1内添加袋装干灰或其他添加剂,调整水泥浆密度达到性能要求。可以通过增大或者减小清水流量来改变混浆速度,操作时先将蝶阀19关闭,待到密度计24显示的水泥浆密度再次接近预设值后,再重新半开蝶阀19,重复均衡过程。待批混罐1内的水泥浆达到性能要求后,通过灌注离心泵26的灌注口向外部三缸柱塞泵灌浆。循环离心泵27和灌注离心泵26可互为备用,确保作业安全:如果循环离心泵27故障,可以通过灌注离心泵26、喷射混合器25、批混罐1来进行批量混浆;如果灌注离心泵26故障,循环离心泵27也可以实现灌注功能,不影响作业。
进一步地,本实用新型可以作以下改进:
在批混罐1底部设置另一个排出口与混浆罐6的排出口合流后,连接到循环离心泵27的吸入口。通常情况下,批混罐1的另一个排出口与循环离心泵27的吸入口之间的蝶阀21是关闭的,批混罐1可以只设一个排出口,接到灌注离心泵26的吸入口上。此处设置另一个排出口与混浆罐6排出口合流后,接到循环离心泵27吸入口的目的是:当批混罐1内水泥浆密度不准确,需要调整批混罐1内水泥浆密度时,需要打开循环离心泵27与批混罐1之间的蝶阀21,并同时打开蝶阀18、蝶阀19、蝶阀20和蝶阀22,通过循环离心泵27对批混罐1内的水泥浆循环来调整批混罐1内水泥浆密度。
清水流量计23后再增加一路连接到批混罐1内部靠近罐顶位置的一圈钻满孔的无缝钢管。此处的作用是:在混浆作业完成后,用来清洗批混罐1。
批混罐1四周采用弧型、底部采用倾斜设计,目的是便于水泥浆排出;有效容积12立方米(100桶),罐内装有带立方米和桶两种刻度的液位标尺;罐顶人孔窗旁装有照明灯,两个大的人孔窗便于水泥灰尘扩散、液位观察、密度测量及罐体内部清洁,照明灯方便液位观察及夜间施工。
动力系统11的发动机模块上设计有顶盖,利用控制平台13固定,可以在油田恶劣的环境下保护发动机。
Claims (5)
1.一种自动控制连续批量混浆橇,包括混浆系统、动力系统(11)、液压系统(14)、气路系统(12)、电控系统(8)、仪表控制台(7),其中混浆系统进一步包括混浆罐(6)、清水离心泵(28)、循环离心泵(27)、灌注离心泵(26),清水流量计(23)后连接到高能混合器(5)的喷射水枪,混浆罐(6)的排出口连接到循环离心泵(27)的吸入口,循环离心泵(27)的排出口其中一路又分为两路,一路经由密度计(24)连接到混浆罐(6),一路连接到高能混合器(5),其特征在于:混浆系统还包括批混罐(1),批混罐(1)装有喷射混合器(25)和搅拌器(3),循环离心泵(27)的排出口其中一路分开后再增加一路,连接到批混罐(1),批混罐(1)设置有一个排出口与灌注离心泵(26)的吸入口连接,灌注离心泵(26)的排出口其中一路连接到喷射混合器(25)。
2.根据权利要求1所述的自动控制连续批量混浆橇,其特征在于:所述批混罐(1)设置有另一个排出口与所述混浆罐(6)的排出口合流后,连接到所述循环离心泵(27)的吸入口。
3.根据权利要求1或者2所述的自动控制连续批量混浆橇,其特征在于:所述清水流量计(23)后再增加一路连接到所述批混罐(1)内部靠近罐顶位置的一圈钻满孔的无缝钢管。
4.根据权利要求1或者2所述的自动控制连续批量混浆橇,其特征在于:所述批混罐(1)四周采用弧型、底部采用倾斜设计,有效容积12立方米,罐内装有带立方米和桶两种刻度的液位标尺,罐顶人孔窗旁装有照明灯。
5.根据权利要求1或者2所述的自动控制连续批量混浆橇,其特征在于:所述动力系统(11)的发动机模块上设计有顶盖,利用控制平台(13)固定。
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