Metering and Automation Systems
Measurement of injected fluids and multiphase well production
Measure injection and production rates remotely and in real time to improve decision making.
Ultrasonic chemical injection metering valves
The PULSE LF low-flow ultrasonic chemical injection metering valve (CIMV) is designed for injection of low-dose inhibitors (e.g., for wax, scale, corrosion) and uses an ultrasonic flowmeter and a precision needle valve in closed-loop or open-loop position control. It has been engineered to handle flow rates from 0.07 to 159 galUS/h [0.25 to 600 L/h] and it is retrievable by an ROV, whether mounted in a horizontal or vertical orientation.
The PULSE LF CIMV uses a debris-tolerant, microbore, nonintrusive, line-of-sight ultrasonic flowmeter that has no moving parts. Unlike a Venturi type flowmeter, it is pressure independent and has a very low native pressure drop. The flowmeter provides consistent accuracy (better than 2%) and a very large turndown ratio (up to 2,400:1).
A precision needle valve regulates the flow of the chemical through the system. The needle has an equal percentage flow curve, providing exceptional control over a very large flow range.
It is operated by an electric actuator, which provides very fine system adjustment, controlled by the feedback from the ultrasonic flowmeter via the onboard closed-loop control algorithm.