ReAct Clean Out Valve

Certain sections of some wellbores, particularly laterals, require many sections of sand screens to prevent the influx of sand into the completion. The great cost associated with this hardware and rig time for installation of the completion can be dramatically reduced by only completing a short section of the motherbore with screens. However, the success of this may be jeopardized due to mud and solids unloading through the screens and permanently plugging them off.

The ReAct™ Clean Out Valve (RCOV) presents large, open flow ports for unloading drilling mud, solids, or lost-circulation material (LCM). Following a delay of up to 150 days and once the well flow is clean and stable, a ReAct electronic timer system actuates a mechanism that allows well pressure to flood an atmospheric chamber and provide a large closing force to shut off these flow ports. A chamber containing a tracer fluid is opened at this time and gives a surface indication that the tool has functioned.

In so doing, the clean well flow is now directed through the sand screens in the main bore for the remainder of the lifetime of the well.

The device is an integral part of the tubing string and features premium threaded connections. The timer features two electronic units that are independent of each other for full redundancy.

A manual override feature is provided within the RCOV and can be actuated by wireline/coiled tubing intervention. A prong will unlock the ported sleeve from the hydraulic piston assembly, allowing the ported sleeve to be positioned manually to the closed position.