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.
- Accurate time delay mechanism
- Independent backup electronics
- Mechanical override
- Large flow areas
- Available with tracer pocket for activation confirmation
- Field-proven electronics
- Delayed closure for up to 150 days
- Increased cleanup of the wellbore
- Enhances well production
- Minimizes plugging of sand screens
- Reduces length of sand screens required in completion
- Deployed with sand screens.
- Cleanup across multilateral junctions
ReAct Clean Out Valve Specifications
|Tool size||6.625 in.|
|End connections||6⅝-in. premium|
|OD||7.675 in. max.|
|ID||3.50 in. min.*|
|Flow area through ports||48 in.2|
|Tensile rating||465,000 lb|
|Working pressure rating||6,000 psi|
|Temperature rating||Up to 135 °C|
|Time delay||Programmable up to 178 days|
|Actuating force per 1,000 psi||14,800 lb|
*Larger ID can be supplied upon request.
Other sizes and ratings are available upon request.