ClearWELL™ is highly effective in preventing the deposition of calcium carbonate, barium sulphate, calcium sulphate, strontium sulphate and halite.
ClearWELL™ is connected to the surface equipment without interrupting production and transmits a pulsed radio frequency signal along the tubing via a metal-to-metal connection. ClearWELL™ has low power consumption, which can be provided via solar power, and the performance of the ClearWELL™ can be monitored remotely. The technology is safe, environmentally friendly and has the potential to save millions of dollars in scale remediation and lost production each year.
Scale formation occurs when dissolved solids that are present in produced water become supersaturated. Supersaturation typically occurs due to changes in conditions such as temperature and pressure or due to the mixing of incompatible waters such as formation water rich in Ca2+ and Ba2+ and sea water rich in sulphate (SO42-). The formation of scale and its deposition on a surface follows the steps shown in the image opposite.
When a solution becomes supersaturated nucleation will begin to occur. The process of nucleation is usually described as heterogenous or homogenous nucleation. Homogenous nucleation occurs in the absence of any foreign particle or surface. Heterogenous nucleation is the formation of nuclei due to the presence of a foreign particle or imperfect surface that allows the adsorption of the crystal material on its surface. Heterogenous nucleation is the most common form of nucleation as it requires less energy than homogenous nucleation and can occur at lower saturation levels. Secondary nucleation then occurs as a result of the crystal surfaces that are already present and this is the crystal growth stage. Adherence typically occurs in tandem with crystal growth as part of the heterogenous nucleation process.
ClearWELL™ technology imparts an electromagnetic field (EMF) signal into the produced fluid, which has sufficient energy to promote homogenous nucleation before heterogenous nucleation and crystal growth and adherence can occur.
The result is the formation of many non-adhesive, microscopic crystal particles, which are carried out of the well within the bulk fluid.
Independently peer-reviewed studies provide evidence for the effect and efficacy of the technology:
ClearWELL™ is suitable for onshore and offshore wells, plus topside processing facilities and adds value to your operations because it:
By continuously preventing scale build-up in the well and on downhole equipment, such as pumps and valves, ClearWELL™ can reduce or eliminate: