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US 6,768,959 B2Granted
Apparatus and method for accurate pipeline surveying
AssigneeHoneywell International Inc.
InventorMario B. Ignagni
Life of this patent
Estimating the term…
Abstract
A pipeline surveying system including a pipeline pig can accurately provide a pipeline profile after correlation with a previously determined GPS survey. An inertial measurement unit located in the pig determines a pipeline profile as it travels through the pipeline and correlates the measured profile with the GPS survey.
Claims31
A method for surveying a pipeline, comprising:
- measuring characteristics of a pipeline so as to produce measured characteristics;
- computing a measured profile of the pipeline;
- correlating the measured profile of the pipeline with a reference profile of the pipeline so as to produce an estimated-pig-location error;
- and
- correcting at least one position of a pipeline pig using the estimated-pig-location error.
2 more elements
Dependencies are inferred from the claim text.