Tendeka has developed several methods for wireless signal transmission in oil wells. One method is utilizing pressure pulses that propagate in the production flow, another method is utilizing pressure pulses that propagate in static well fluid, and a third method applies acoustic signals that propagate in the fluid or steel tubular of a well. The systems and methods are patent pending.
The first commercial application is a wireless downhole pressure and temperature gauge. The system has been field tested in live wells offshore Norway and is now in the commercial stage.
In relation to downhole well applications, there are an increasing number of cases where the placement of downhole components come into conflict with possible future access requirements of mechanical tooling such as shifting tools, pulling tools and override tools. In particular this applies to operations involving multilateral and sidetrack wells, where components installed in an old branch can become completely inaccessible following the drilling and completion program of a new branch.
The Tendeka wireless systems can be applied to operate such “hidden” downhole components. The technologies will enable optimal placement of barriers, circulation valves and similar tools without coming into conflict with a subsequent need to access them with mechanical tools. In this way, one avoids the risk of getting stuck with a mechanical override string in the side track junction.
Wireless technology is expected to play an ever increasing role as multilateral and sidetrack operations become increasingly popular.