Page 45: of Offshore Engineer Magazine (Sep/Oct 2016)

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many ? owmeter and CIMV designs. the ? owmeter delivers debris-tolerant PULSE LF CIMV enables full inhibition

SUBSEA

Traditional ? ow measurement ? ow measurement, is chemical inde- without the risk of under- or overdos- technologies used in subsea chemi- pendent with a very low native pressure ing. Operators now have the option to cal injection metering valves typically drop, and does not require subsea ? ltra- reliably deliver LDIs via cost ef? cient use Venturi-type ? ow measurement. tion. Developed to address the complete subsea distributed chemical injection

Inaccuracies in ? ow measurement can LDI chemical injection portfolio from systems with precision regardless of stem from particulate contamination 0.25 L/h to 600 L/h [1.6 to 3800 gal/d], chemical properties or contamina- and blockage in the CIMV and from the this ? owmeter is combined in closed tion, giving them the option to make fact that CIMVs are engineered years loop control with a throttling valve, pro- chemical decisions independent of the in advance of being put into service, viding a self-regulating device requiring installed hardware.

In the subsea environment, accuracy often with limited knowledge of the only one user-de? ned input—low rate.

of inhibitor dosage is paramount. The

PULSE LF CIMV increases ? owmeter chemicals to be injected. Such events The PULSE LF CIMV’s ? owmeter David Simpson is accuracy and inhibitor dosage. Image from render the CIMV as being not properly addresses the key limitation of present the subsea product

Schlumberger.

tailored for the chemicals being used, LDI chemical injection technologies— manager for Surface and ultimately, potential system under sensitivity to blockage. The ? owmeter is Systems, Cameron, performance occurs. particulate tolerant, meaning that con- a Schlumberger taminated ? uid can easily pass through company, a position

A new dawn in the unrestricted ? owmeter tube. It also he assumed in 2008.

CIMV ? owmeter design provides consistent high accuracy of With 19 years’

The latest low-? ow CIMV ? owmeter de- reading independent of changes in experience, he has worked offshore, in sign delivers accuracy better than +/-2% chemical properties such as viscosity, product design as principal subsea of reading for LDI injection compared and reliably measures chemical inhibi- choke design engineer, as a technical to the industry standard Venturi-type tor ? ow rate. Real-time feedback from account manager, and in product ? owmeter that may only deliver ac- the ? owmeter enables autonomous con- management. He launched the Cameron curacy of 5-10% full scale. Launched at trol of the throttling valve, maintaining initial low-? ow CIMV technology in 2007,

OTC 2016, the new Cameron PULSE LF a user de? ned injection rate set point and the third generation medium- and low-? ow ultrasonic chemical injection inde? nitely regardless of up- or down- high-? ow designs in 2010. Simpson is a metering valve features a microbore stream system disturbances. chartered engineer with an honors nonintrusive, line-of-sight ultrasonic Packaged as an ROV-retrievable degree in mechanical engineering from ? owmeter. Featuring no moving parts, device with onboard diagnostics, the the Dublin Institute of Technology.

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