Abstract: A chemical treatment system that injects a dosage chemical solution into a process. A condition of the process is sensed by a sensor, communicated to a controller and used as a basis for varying in real time the dosage of the chemical solution. The sensor, the controller, a pump and the process are disposed in a closed control loop. The controller controls the operation of the pump (speed, duty cycle and the like) to vary the dosage based on the sensed condition, which is disclosed as a corrosion and/or scale of an element of the process, although other conditions can control the dosage as well.

Abstract: The present invention relates to a method and apparatus for detection of hydrogen sulfide in downhole operations. A downhole tool is provided with a coupon adapted to react at varying degrees to exposure to concentrations of hydrogen sulfide. The downhole tool is positioned in the wellbore with the coupon(s) exposed to downhole fluids. A reaction to a change in the coupon, such as coloration, is used to determine the presence and concentration of hydrogen sulfide.

Abstract: The present invention relates to a method and apparatus for detection of hydrogen sulfide in downhole operations. A downhole tool is provided with a coupon adapted to react at varying degrees to exposure to concentrations of hydrogen sulfide. The downhole tool is positioned in the wellbore with the coupon(s) exposed to downhole fluids. A reaction to a change in the coupon, such as coloration, is used to determine the presence and concentration of hydrogen sulfide.