Stewart Technology Associates (STA) is a technology consultancy specializing in marine and offshore structures, fluid dynamics and many other diverse services and systems. STA offers a wide range of technology software and oil/gas process and high efficiency separator technology.
Get to know us! View our online PowerPoint Presentation of STA Capability Sheets, which fully outline the diverse services we offer.
Stewart Technology Associates (STA) founded in 1986,
provides a wide variety of services in the offshore and
STA undertakes structural dynamic and
of many structures and systems using a variety of
technology software tools.
Orcaflex is generally the
software of choice for riser design and
riser analysis, mooring
design and mooring analysis,
single point moorings
top tensioned risers, flexible
risers, drilling and production risers,
steel catenary risers
and cable dynamics problems
worked with Orcaflex and Orcina since 1986.
Read more about Orcaflex >>
STA provides jack-up analysis
and jack-up design and review services.
The Irish Sea Pioneer, a 4-legged jack-up was designed
by STA in 1996 and built at Bollinger Shipyard, Louisiana,
for Halliburton. This vessel now works the Liverpool Bay
Project, UK. STA developed a jack-up analysis program, STA
JACKWAVE, beginning in 1987.
STA LIFTBOAT is a
similar program used by liftboat designers for preliminary
design of liftboats. The US Coast Guard also use it for
liftboat design reviews.
STA has proprietary software and designs for
marine training simulators used
for improving emergency preparedness of crews on jack-ups,
semi-submersibles, and liftboats. STA now helps US clients
with CE marking in conformance
with the 98/37/EC Machinery Directive.
Read more about
Liftboat Design >>
Mr. Stewart has acted as an expert witness on many occasions,
providing expert testimony associated with
failures, riser failure,
single point moorings,
pile anchors, anchor failures,
suction pile failures, cable
analysis, and marine collisions and capsize.
An interesting expert
witness marine litigation case involved a bottom-founded
barge that capsized while resting on-bottom of a lake in
relatively benign environmental conditions. This case involved
an understanding of naval architecture, mechanical technology
and geotechnical technology, all contributing to an unusual
Read more about
Expert Witness Marine >>
STA clients have been increasingly interested in renewable
energy, particularly from offshore fixed and floating wind farms, in-stream hydrokinetic devices and wave energy converters.
The ASCE COPRI Marine Renewable Energy Committee was formed in 2009 and Bil Stewart was appointed Chairman. The MRE Committee has been producing a new document for Civil Engineer involved with MRE projects. An extract from the Table of Contents is shown below:
STA has assisted clients with wind farm installations
jack-ups and crane barges.
STA has used Orcaflex for
design and analysis of
wave power systems, and proprietary tension-leg platform-mounted
Read more about Marine Renewable Energy >>
Many times the folks on board a jack-up, or liftboat, are concerned about the swinging of the bubbles in the glass tubes of their heel and trim inclinometers. They seem to indicate that the rig is rocking. Invariably it is only swaying and the hull is staying level. However, the horizontal accelerations are causing the inclinometer bubbles to move. The typical -5º to +5º glass inclinometer on a jack-up can … Continue reading →