Geometrical instruments – Gauge – Pipe layout or fitting
Patent
1984-06-18
1985-07-16
Little, Willis
Geometrical instruments
Gauge
Pipe layout or fitting
33180R, 33562, G01B 514, G01B 525, G01B 330
Patent
active
045287570
ABSTRACT:
A remotely operable apparatus and method for determining from a remote location the distance and angular orientation between two structurally unconnected members, such as two sections of a subsea pipeline, is disclosed. The apparatus of the invention comprises generally two remotely releasable guide posts disposed, respectively, in known spaced relationships to the two structurally unconnected members and a remotely operable measuring template. The remotely operable measuring template is adapted to telescope axially and includes two ball and socket joints to compensate for misalignment or differences in elevation between the guide posts. In practicing the method of the invention, the remotely operable measuring template is positioned over and firmly attached to the guide posts. All movable joints of the template are then locked and the guide posts are remotely released. The guide posts may then be retrieved to the remote location in the same spaced relationship as originally disposed. The distance and angular orientation between the guide posts may then be measured at the remote location and the distance and angular orientation between the two structurally unconnected members may be computed from such measurement.
REFERENCES:
patent: 2431101 (1947-11-01), Woods
patent: 3418721 (1968-12-01), Christensen
patent: 3586103 (1971-06-01), Brown et al.
patent: 3618661 (1971-11-01), Peterman
patent: 3667128 (1972-06-01), Morgan
patent: 3854211 (1974-12-01), Oliver et al.
patent: 4231161 (1980-11-01), Belfiore
Kopp Frans
McKeehan David S.
Bell Keith A.
Exxon Production Research Co.
Little Willis
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