BORESIGHT is a wireless communications system designed to give accurate liquid level indication in any wellbore with a gas-filled annulus. It gives high speed and on-demand monitoring for any well that requires reliable liquid level control and is particularly suited to low-cost unconventional gas wells that require controlled dewatering. Additional bottom-hole and along-string sensors can be included if required.
The system comprises an arrangement of downhole communication transceivers that form a robust, communication network to relay data along the wellbore. The network is self-optimising, routing data to surface along the most efficient pathways available.
Transceivers are attached to the production tubular using the simple, strong and highly reliable HCL Smart Tie system. These are deployed in seconds, using tools that need no intensive training. The components of the system are fully captive meaning no free parts over the wellbore. Transceivers can be located on the string as the pipes enter the well, or may also be installed on pipes before well-deployment, hence saving valuable rig time.
Transceivers near the liquid level will report to topside a reliable level indication within seconds. . Unlike other systems, the liquid level recorded is insensitive to liquid surface conditions such as foaming. For the first time, well-owners can energise pumps in the safe knowledge that they will not be subjected to the premature failures that arise should the pump run dry.
Intuitive surface read out and control
The touchscreen, high visibility, display gives operators an instant insight into the systems key parameters. The surface read out (SRO) can also be interrogated by any SCADA RTU to gather long term trends or provide remote monitoring.
Pump off control
The SRO can be integrated into your artificial lift system to provide pump off control. Costly well workovers can be avoided whist production can be optimised. The pump system can respond to changing well conditions without intervention thus increasing your safe operating envelope.
Variable transceiver spacing on string
The typical distance between each transceiver is between 50 to 200 metres. Users can select based on specific well conditions.
Where level indication is required to high precision, a shorter node spacing (e.g. 10m) may be used near the downhole pump to provide a very accurate liquid level assessment.
Well head outlet
The transceiver’s wireless signals are received at surface through an insert into the annulus. The wellhead antenna is protected by an intrinsically-safe barrier between the SRO and the wellhead.
Each transceiver can report temperature and vibration information from its location. This provides a distributed profile of the pumps operating conditions. Vibration monitoring can be used to detect early signs of rod centraliser wear providing advanced warning of conditions that may lead to rod break. This allows timely intervention that can avoid costly fishing exercises or full workovers.
Workover HSE benefits
Removing the wire in these installations provides a significant safety benefit. Many gas wells with wired downhole gauges are difficult to workover without killing the well. This is highly undesirable with sensitive formations and especially with Coal Bed Methane/Coal Seam Gas.
Accurate Liquid Level Monitoring
No Hazardous Goods Shipping Requirements
Distributed Temperature and Vibration
Monitoring Along String
Pump Off Control
Failure-resilient Multiple Redundancy
On Demand Pressure Build-up Logging
Aids Rod Break Prediction
Acts as Centraliser and Friction Reducer