套管内换向连续冲砂装置的研制与应用

为了解决传统停泵接冲砂管冲砂工艺中存在的诸多问题,研制了套管内换向连续冲砂装置,实现了套管内换向的不停泵连续冲砂作业模式,现场应用效果较好,该装置具有以下特点:(1)在冲砂过程中不需要停泵即可连接冲砂管,可有效避免因停泵接冲砂管而造成的沉砂卡管事故,减少处理砂卡及大修解卡施工;(2)不需要在油管上部连接冲砂油壬和水龙带,从而大大降低冲砂作业的劳动强度,避免弯头脱落造成落物伤人事故;(3)连续不停泵冲砂可以提高冲砂作业质量,延长油井生产周期,增加原油产量;(4)现场安装和使用都比较方便,尤其对于大井段冲砂和水平井冲砂具有明显优势。

Development and application of reversing continuous sand washing device inside the casing

For solving the problems existing in the traditional sand washing technology of connecting sand-washing pipe by shutting down the pump,the reversing continuous sand washing device inside the casing is developed to perform reversing continuous sand washing operation inside the casing without shutting down the pump.The field application has achieved good results:(1)the sand washing pipe can be connected without shutting down the pipe during the sand washing operation,thus effectively preventing the occurrence of pipe stuck by the sand due to shut down the pump for connecting sand washing pipe and reducing the related treatment;(2)it is unnecessary to connect sand-washing oil ring and hose on the upper part of the tubing,thus greatly reducing the labor intensity of sand washing and preventing the pipe bend from breaking off;(3)The continuous sand washing operation can improve the quality and extend the production period and increase the oil production;(4)The field installation and application are very convenient,especially for the sand washing in large well interval and horizontal well.