Revolver with eMotion
Save 32 hours rig time using a deep-set Revolver with eMotion - Details
Save 25 hours rig time using a shallow-set Revolver with eMotion - Details
Description
Revolver is a remotely operated open/close ball valve designed for controlling flow through the tubing. Normally it is controlled by the operator from surface via hydraulic control lines. The eMotion unit is a self-contained downhole control and power unit designed to operate hydraulic tools without the need for any surface control lines for either power or communication.
Combining the Revolver and eMotion devices provides a new type of valve that can be opened and closed at will or by pre-programmed instructions, without the need for any surface control lines or intervention. By removing the control lines and replacing them with the eMotion unit, the eMotion takes full control over the Revolution valve, opening and closing it as per its pre-programmed instructions.
Control
The control system of eMotion is based on field-proven eRED technology. This system uses integrated sensors and electronics to monitor and respond to the actual downhole conditions The eMotion is pre-programmed to respond to a specific well condition (know as a trigger) by initiating a task, to either open or close the Revolver by pumping hydraulic fluid in the appropriate direction.
In a closed-in well, the conditions can be effectively manipulated from surface by applying pressure to the tubing. This technique effectively allows the operator to communicate with the eMotion thereby opening the Revolution valve, by applying a pre-defined pressure for a pre-defined time period and creating the trigger conditions downhole.
The eMotion only responds to the pre-defined pressure being applied for the pre-defined time. Any pressure applied outside the defined values will be ignored, allowing unlimited and various pressure cycles to be applied to the tubing without initiating activation.
Example Operation
Prior to deployment, the eMotion is pre-programmed with the necessary instructions, including the trigger parameters and tasks to be initiated when triggers are detected. The assembly is then permanently deployed as part of the tubing string with the valve set in the open position allowing the completion to self-fill and for well control purposes. Once at depth, any debris can also be circulated out of the well.
As per program, the eMotion unit closes the Revolver using either a timer or hydrostatic pressure as the trigger. Internal pumps circulate hydraulic fluid around the closed-loop circuit to shut the valve.
Since the eMotion only responds to pre-defined pressure being applied for the pre-defined time, any pressure applied outside these defined values is ignored. This allows unlimited and various pressure cycles to be applied to the tubing without initiating eMotion. Tubing integrity tests, packer setting or christmas tree commissioning can all be accomplished while the Revolver remains closed.
Having finished all necessary operations, the Revolver can then be re-opened by the eMotion, this time using either a timer or pressure/timer as the trigger. The internal pumps circulate the hydraulic fluid in the opposite direction around the closed-loop circuit to re-open the valve. When the operations are completed, the Revolver with eMotion assembly is left downhole. The open valve providing maximum flow through to maximise production or injection rates and giving full bore access to equipment futher down the well. At any time the Revolver can be closed and re-opened with either wireline or coiled tubing operations.
Development of the Revolver with eMotion is now in the final stages. The design has been driven with input from some of the oil and gas sector's leading completion and intervention professionals.
