Sucker Rod Sensor
Downhole Artificial Lift Sensor
The Sucker Rod Sensor is a downhole sensor designed by Well Innovation AS to provide a modernized and efficient method to troubleshoot rod lift system failures, replacing outdated and expensive methods that use conventional surface measurement with downhole prediction methods developed in the 1990’s for shallow vertical wells.
The Sucker Rod Sensor system provides direct measurements, enabling operators to implement a systemic engineering approach to troubleshooting problems under downhole conditions. These sensors, when placed in strategic locations throughout the rod string, measure the downhole force with the magnitude of detail required to identify and troubleshoot downhole problems that cause rod, tubing and pump failures. The system allows operators to see what is working, and what is not, in order to improve mean time between failure while optimizing production and eliminating unnecessary costs.
The Sucker Rod Sensor system can be positioned anywhere in the rod string. It collects 10 Hz measured data or 10 measurements per second for the following: pressure, temperature, torque, tension and compression and velocity and position for the 3-axis accelerometers. It is memory based with up to 400 hours of 10-Hz recordable data. It is preprogramed prior to going into the well with the ability to turn on and off to extend the number of days the tool is recording data.
The measurements provided through this system generate a “measured” Dynacard, in comparison to the conventional wave equation Dynacard. These measured cards show details about the well that are not being captured with today’s predicted models.
The current tool has a temperature rating of 135 C/275 F with a 34 MPA/5,000 psi differential pressure rating. The tensile rating is 25,000 KG/55,000 lbs. The future plan is to develop the real-time version of the Sucker Rod Sensor so that it can be fed directly into the pump-off controller.
