CN205172478U - 井下螺旋冲洗工具 - Google Patents
井下螺旋冲洗工具 Download PDFInfo
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Abstract
一种井下螺旋冲洗工具，包括柱状的工具主体，所述工具主体设置有液体通道，所述流体通道自内向外分为连接段、导流段、引导段和喷射段，所述连接段设置有内螺纹；所述导流段为圆柱状，其中安装有可旋转的螺杆，所述螺杆上轴向设置有螺旋导流槽；所述引导段内径自内向外逐渐减小；所述喷射段设置有安装沉孔，安装沉孔中固装有喷嘴。井下螺旋冲洗工具结构简单，本身不会转动，不需要安装轴承及密封件，直接通过连接段的内螺纹连接冲砂管串即可使用，拆装容易，容易保养和维护，成本低，经济实用型强。通过螺杆旋转产生旋流，所需的水流量小，产生的旋流能够完全覆盖套管内壁，冲洗效果好，也极大提高了冲洗效率，降低了用水量，节约了冲洗成本。
Description
技术领域
本实用新型涉及油气井用井下工具，具体的说，是一种井下螺旋冲洗工具。
背景技术
射孔作业是建立套管内与储层之间通道的常规作业方式，在生产中，套管射孔后，水平井油藏出砂现象严重，堵塞生产通道，影响原油产量。常用方法是利用连续油管带冲洗工具洗井除砂，现有技术中旋转冲洗工具为了制造旋流冲洗效果，大都是工具带多喷嘴一起旋转，通过喷嘴旋转制造旋流，需要安装轴承和密封件等，结构复杂，工具成本高，且现场不易安装维护。工具安装多个喷嘴，增加结构复杂程度，作业中流体在工具内摩阻就越大，降低了作业效率，增加了施工风险，而且需要保证较大的泵注量，才能制造需要的冲洗效果。
实用新型内容
本实用新型针对上述现有技术存在的不足，设计了一种井下螺旋冲洗工具。
本实用新型的井下螺旋冲洗工具，包括柱状的工具主体，所述工具主体设置有液体通道，所述流体通道自内向外分为连接段、导流段、引导段和喷射段，所述连接段设置有内螺纹；所述导流段为圆柱状，其中安装有可旋转的螺杆，所述螺杆上轴向设置有螺旋导流槽；所述引导段内径自内向外逐渐减小；所述喷射段设置有安装沉孔，安装沉孔中固装有喷嘴。
优选的是，所述的引导段设置有内锥面，所述内锥面与工具主体径向的夹角为15°～75°。
优选的是，所述喷嘴设置的喷孔内端的内径与引导段外端的内径相同。
本实用新型的有益效果是：井下螺旋冲洗工具结构简单，本身不会转动，不需要安装轴承及密封件，直接通过连接段的内螺纹连接冲砂管串即可使用，拆装容易，容易保养和维护，成本低，经济实用型强。通过螺杆旋转产生旋流，所需的水流量小，产生的旋流能够完全覆盖套管内壁，冲洗效果好，也极大提高了冲洗效率，降低了用水量，节约了冲洗成本。
引导段内锥面的夹角，使水流加速，并加速到足够的速度，保证冲洗水流的冲洗效果。喷孔内端与引导段外端大小相同，避免水流在两者之间流动时，水流被阻挡或者产生乱流，保证水流的流速和旋流，能够达到良好的冲洗效果。
附图说明
附图1为井下螺旋冲洗工具的结构示意图；
附图2为螺杆的结构示意图。
具体实施方式
为了能进一步了解本实用新型的结构、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实用新型的技术方案，并非限定本实用新型。
本实用新型的具体实施方式如下：
如图1所示，该井下螺旋冲洗工具，包括柱状的工具主体1，工具主体1设置有液体通道2。
流体通道自内向外分为连接段3、导流段4、引导段5和喷射段6。
连接段3设置有内螺纹；导流段4为圆柱状，其中安装有可旋转的螺杆7，螺杆7上轴向设置有螺旋导流槽8；引导段5内径自内向外逐渐减小；喷射段6设置有安装沉孔，安装沉孔中固装有喷嘴9。
使用时，将工具主体1通过连接段3的内螺纹安装到冲砂管串的末端，冲砂管串向工具主体1的液体通道2内供水，水流进入到导流段4内，并沿着螺杆7的螺旋导流槽8流动，带动螺杆7旋转，并使水流形成旋流。形成旋流的水流继续通过引导段5，被引导段5加速，最后通过喷射段6的喷嘴9喷出，喷嘴喷出的水流形成径向扩张的高速旋转射流，使大部分的水流冲击到套管内壁，冲洗管套内的积砂。
引导段5可设置内锥面10，内锥面10与工具主体1径向的夹角可设定为15°～75°，使水流能够加速到足够的速度，能够强有力的冲洗套内的积砂，保证冲洗水流的冲洗效果。
喷嘴9喷孔内端的内径与引导段5外端的内径相同，避免水流在两者之间流动时被阻挡而减速，甚至产生乱流，保证水流的流速和旋流，能够达到良好的冲洗效果。
Claims (3)
1.一种井下螺旋冲洗工具，其特征在于，包括柱状的工具主体(1)，所述工具主体(1)设置有液体通道(2)，所述流体通道自内向外分为连接段(3)、导流段(4)、引导段(5)和喷射段(6)，所述连接段(3)设置有内螺纹；所述导流段(4)为圆柱状，其中安装有可旋转的螺杆(7)，所述螺杆(7)上轴向设置有螺旋导流槽(8)；所述引导段(5)内径自内向外逐渐减小；所述喷射段(6)设置有安装沉孔，安装沉孔中固装有喷嘴(9)。
2.根据权利要求1所述的井下螺旋冲洗工具，其特征在于，所述的引导段(5)设置有内锥面(10)，所述内锥面(10)与工具主体(1)径向的夹角为15°～75°。
3.根据权利要求1所述的井下螺旋冲洗工具，其特征在于，所述喷嘴(9)设置的喷孔内端的内径与引导段(5)外端的内径相同。
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