I am a specialist
consultant for the Oil and Gas industry. My quality statement is 'to be considered a valuable asset to
my client's business'.
This means providing
more than just loop tuning.
following sections introduce some of my core oil and gas
activities which include process optimisation and
de-bottlenecking, flare reduction, improvement of produced water
systems, compressor surge line mapping and slug mitigation as
well as the 'conventional' control engineering tasks of PID
Please contact me for
It is often said that 90% of process
controllers have not been correctly tuned and many
loops still retain their factory default settings
despite years of inadequate performance. Every controller should
be optimised for its specific environment with consideration
given to the process conditions, startup/shutdown requirements
and process dynamics.
Then again, the root-cause of many control problems can be
rather more subtle than poor PID tuning: see this
tutorial for a
selection of some control-related problems solved by Contek over
the last few years.
Contek Systems Ltd has been directly responsible
for the performance improvements of many assets
throughout the North Sea. Improved process stability is not only
beneficial to the operators, but also improves production and
reduces environmental emissions.
Simulation and Modelling
Dynamic simulation, mathematical modelling and optimisation
techniques provide detailed insight into the process dynamics
to facilitate the design of suitable control schemes.
Contek Systems Ltd has experience with Hysys Dynamics, General
Algebraic Modelling System (GAMS) and Matlab.
Gas composition and process conditions
generally alter as the field ages. If the
compressor control system is not retuned for the
new conditions, inadequate surge protection,
unstable control and excessive recycling can
Contek Systems Ltd has
considerable hands-on experience with
anti-surge and performance controllers from CCC and other
vendors, including surge line mapping and
Standard constant-gain oil level controllers on
slug-catchers and separators prevent the vessel
from 'washing out' liquid slugs and induce
instability into the downstream process.
Contek Systems Ltd has experience of non-linear control techniques which enable
slug-catchers and separators to do their intended
jobs. These techniques can usually be implemented
in the existing control system with no
modifications to pipework or instrumentation.
Algorithms have also been configured in readily
available panel-mounted industrial controllers.
The root-cause of many process instability
problems can be traced to incorrect implementation
of commonly-used control techniques, such as
low- or high-output
selectors, signal filters and output clamps. These
techniques are often specified in the design phases
without any true understanding of the
Contek Systems Ltd has considerable experience in
correcting the implementation of these and many
Offshore and site work
Much of my
work is carried out offshore or onsite, generally requiring a
visit of four to five days during which the critical process and
control issues will be identified and improved. High speed data
acquisition equipment is used to collect detailed plant data for
analysis and optimisation.
Please contact John
the latest schedule of rates
I can assist in
designing and implementing WindowsTM based software packages for any
process, control or mathematical application. Take
a look at my current product