The Multi-cycle Circulating Sub is a sub could control its side entrance “open” and “close” at down hole by dropping the ball from the well head to realize the link or break of the connection between annular and water hole several times. It is an ideal tool for extended reach drilling and Horizontal Drilling.

 

Advantage    

 

1.The “open” operation of this tool is depended on drive ball get through the circulating sub rather than reach the catcher seat.

2.There are two large side entrance of this tool to reduce the risk of blockage.

3.The multi-cycle circulating sub is the only one in the tools with the same function which allows the reverse circulation at entire basin area.

4.The special design ensure that the side entrance is already open before the drive ball reach catcher seat, so to prevent the drive ball be shear into catcher basket by accident.

5. Multi-cycle circulating sub should be at “Open state” to go down the well.

6.The Multi-cycle circulating sub allow at least six times “Open” and “Close” working cycle, it also could be design to add double cycles at request.