the earth the flow of fluid 27 into the tubing 30 and up to the surface may result from the natural fluid pressure within the formation 20 or may be enhanced by the addition of a submersible pump and pumping system to the fluid production system 10 numerous aspects of the completion system 10 may rely on mechanical motion to change from one operating state to another or to regulate the flow of production fluids control lines which run from the surface may control the setting of these valves or other mechanical interfaces which regulate the operation of various components within or cooperating with the completion for example the control lines may induce the operation of a valve a lever a piston sleeve or some other moving component which regulates the operation of the completion system 10 such as the intake of production fluid 27 the wellbore environment however is generally hostile to mechanical equipment disposed downhole in addition to high temperature and pressure as well as corrosive conditions the wellbore is also typically an aqueous or partially aqueous environment this aqueous nature of the wellbore over time can lead to mineral and mineral salt deposits sometimes called scale which coat the metallic and other surfaces of the downhole equipment the deposition of minerals may be due to a chemical reaction with the surface of the equipment chemical reactions within the water and other fluids within the wellbore changes in pressure or temperature or a change in the composition of the solution surrounding the equipment scale may also be formed as a byproduct of corrosion the deposition products which comprise scale typically include calcium carbonate calcium sulfate barium sulfate strontium sulfate iron sulfide iron oxides iron carbonate.