Page 93 - Oil and Gas Production Handbook An Introduction to Oil and Gas Production

bacteria that produces hydrogen sulfide and clogs
filters. Typical uses include diesel tanks, produced
water (after hydrocyclones), and slop and ballast
tanks.
Corrosion inhibitor Corrosion inhibitor is injected in the export pipelines
and storage tanks. Exported oil can be highly
corrosive and lead to corrosion of the inside of the
pipeline or tank. The corrosion inhibitor will protect by
forming a thin film on metal surfaces.
Drag reducers Drag reducers improve the flow in pipelines. Fluid
near the pipe tries to stay stationary while fluid in the
center region of the pipe is moving quickly. This large
difference in fluid causes turbulent bursts to occur in
the buffer region. Turbulent bursts propagate and form
turbulent eddies, which cause drag.
Drag-reducing polymers are long-chain, ultra-high
molecular weight polymers from 1 to 10 million u), with
higher molecular weight polymers giving better drag
reduction performance. With only parts-per-million
levels in the pipeline fluid, drag-reducing polymers
suppress the formation of turbulent bursts in the buffer
region. The net result of using a drag-reducing
polymer in turbulent flow is a decrease in the frictional
pressure drop in the pipeline by as much as 70%. This
can be used to lower pressure or improve throughput.

6.9 Telecom

By tradition, all electronic systems that do not fall naturally under the
electrical or automation bracket are grouped as telecommunication systems.
And as such the telecom system consists of variety of subsystems for
human and computer wired and wireless communications, monitoring,
observation, messaging and entertainment.

Some of the main systems are:

· Public Address & Alarm System/F&G Integration
· Access Control
· Drillers talk back System
· UHF Radio Network System
· Closed Circuit TV System
· Mandatory Radio System

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