Martin Linge flow meters to monitor MEG injection

Offshore staff

BUCKINGHAM, UK Litre Meter has supplied 14 displacement flow meters for Total’s Martin Linge field development in the Norwegian North Sea.

The consignment included MF30, HF20, VFF8 and V125 models, all constructed in Duplex stainless steel. They were shipped to the Samsung/Technip consortium for use in a chemical injection skid.

Martin Linge is in 115 m (377 ft) of water, 170 km (105 mi) west of Bergen. Total and partners Statoil and Petoro have commissioned a manned platform with process, separation and compressor capabilities powered from shore, producing around 80,000 b/d.

Operations will be controlled remotely from shore via a fiber-optic system. Litre Meter’s flow controllers will measure the flow of chemicals – they are capable of operating at varying flow rates and pressures.

The V125 meter was designed to measure the discharge of monoethylene glycol (MEG) at the wellhead pump. It was constructed from Duplex with a PVD coated SS nitronic rotor with a 2-in. ANSI 2500 RTJ connection and is pressure rated to 414 bar (6,004 psi).

The VFF8 PD meter has a similar pressure rating while the HF20 is rated to 206 bar (2,988 psi) and the MF30 flowmeters to 690 bar (10,007 psi).

MEG will be injected at high pressure where there is a risk of hydrates (dew) forming then freezing at low temperature. Litre Meter’s flow meters will measure the amount of MEG needed to prevent hydrate formation.

The process, known as bullheading, forcibly pumps MEG into the borehole to act as an “antifreeze” to lower the freezing point of gas hydrate. This protects the wells’ sub-surface valves from hydrates forming under high pressure and low temperatures during long shutdowns.



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