Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Reexamination Certificate
2006-06-27
2006-06-27
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
C405S166000, C405S172000, C405S224200, C166S341000, C166S345000, C166S350000, C166S359000, C166S367000
Reexamination Certificate
active
07066686
ABSTRACT:
Method intended for automatic control of an underwater pipe for connecting the lower end of the pipe to a wellhead, wherein the following stages are carried out:Stage 1: determining a mathematical model expressing the position of the lower end of the pipe as a function of the position of the upper end of the pipe,Stage 2: determining a reference path leading to the wellhead,Stage 3: from the mathematical model determined in stage 1, determining control laws allowing to control the path of the lower end of the pipe,Stage 4: applying determined motions to the upper end of the pipe so that the position of the lower end is as close as possible to the reference path determined in stage 2.
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Preliminary Search Report with English language translation.
Biolley Francis
Creff Yann
Le Cunff Cédric
Levine Jean
Putot Claude
Antonelli, Terry Stout and Kraus, LLP.
Institut Francais du Pe'trole
Lagman Frederick L.
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