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.
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.
Effective, reliable solutions for subsea pipeline, manifold, and production challenges.
Technology boosts critical accuracy of subsea, low-flow chemical injection.
Subsea distributed injection method allows precise and accurate injection of chemicals to many individual wells at appropriate injection rates.
The low-flow PULSE ultrasonic CIMV increases flowmeter accuracy and inhibitor dosage.
Greater accuracy and reliability in low-dose inhibitor injection and hydrate mitigation.