StarTrak
developed the "One Pass" Pipeline
River & Inland Waterway Inspection profile system in 1980. To
date this is the
most
successful system of its kind, with thousands of crossings
surveyed.
No pigs are needed for this service!
Standard "D" size plan & profile drawing(click for printable copy)
System
Description:
The
"One-pass" system is a highly
accurate pipeline detection
method used to determine both the horizontal and vertical coordinates
of
a pipeline or cable. The pipeline or cable is electromagnetically
energized
with a low frequency AC current at cathodic protection test leads
points
on each side of the pipeline crossing. A receiver is calibrated at
known
pipe depths (probed) near the river banks.
The
receiver is mated with the on
board computer running
ARiver software to automatically capture pipeline depth down to 40
meters
(130 ft), water depth, together with Differential Global Positioning
System
(DGPS) in each pass over the pipeline. At specified intervals, the pipe
readings,
water depth and DGPS readings are automatically stored into the
"One-Pass"
memory system allowing a contour survey of the river bed above and in
the
areas surrounding the pipeline.
The
ARiver software gathers the
necessary field data,
compiles the results of the data and translates into a DXF format for
easy
insertion into popular CAD programs.
Contour
data is also made
available in a variety of popular
formats.
The
"One-Pass" system is designed
and manufactured by
StarTrak
| Sichuan
Petroleum personnel
utilizing "One Pass" system,
for inspection of the Zhonghe River pipeline crossing in Sichuan, China. |
 |
The
system also utilizes:
Sonar by: L.&.
M. Technical Services (Ohmex)
G.P.S. by: Thales Navigation (Ashtech).
Advantages
& Application:
- Accurate
plan and profile of
pipelines and cables, regardless
of the depth of cover. Depths of cover can be determined to
approximately
130 feet. The "One Pass" system is currently the only reliable survey
method
capable of inspecting drilled crossings.
- Complete
pipeline profile from
a point of normal cover on
one bank of the river to normal cover on the opposite bank.
- Positive
pipeline
identification and profiling of the specific
pipeline desired to be profiled. There is no assurance that divers can
provide this information utilizing probe bars at multiple parallel
crossings
in zero visibility.
- The
"One Pass" system is
unaffected by river bottom currents
and inspection can be conducted generally under more severe conditions
than diver type surveys.
- Fast
and reliable, field
operations are generally
complete in less than 2 days for crossings under 3000 ft.( 950m.)
Depending on
clients
requirements.
- No
Pig needed
- Location
of coating defects or
holidays can be ascertained.
- With
accurate records of the
pipeline plan and profile, results
of future inspections can be compared to previous records to ascertain:
- Level
of potential risk
damage to the pipeline as a result
of bottom erosion trends which, may lead to suspended
pipeline spans.
- Identification
of areas where
pipelines have shifted in position
due to unstable river bottom soils.
- More
accurate estimation of
the cost of pipeline repairs.
- Cad
(AutoCad)
drawings are made available to
the client shortly after completion of field survey work. Often results
can be drawn up overnight in critical situations.
- Drawings are
tailored to the
clients needs and and requirements.
The clients title block and style is used when available.
- The
system can be utilized from
an inflatable craft on smaller crossings.
- Air
transportable, allowing
crews to provide rapid response
to critical situations.
Emergency
Operations:
StarTrak can turn around
emergency inspections with enough information in the drawings to
satisfy most
client and governmental agenies requirements within 6 hrs after field
work is complete. This is normally 2 "runs" over the waterway and
minimal QC. Full requirements and Quality Control can then be fulfilled
after the emergency has passed.
See San
Jacinto 1994.
Download
DXF of Sample Drawing
Experiences:
Our
1st Attempt - Revisited
10 inspections in 8 days including 800
miles travel time.
Houston Ship
Channel Completed.
S.P.A.
(China) Commissions River Crossing Survey System
San Jacinto River 1994
Click
Here, for a paper
on Pipeline Inland Waterway
Inspections.
For Sales or Service, please contact:
Ernest Casey
281-599-7557
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