Shell Oil Comapny

Thomas E Long

Joe O Esparza

Frans F Kopp

Joe H Haws

Maurice M Patterson

Robert F Engel

Ralph M Warrington

A clamp is disclosed which is capable of latching on to a buckle arrestor on a subsea pipeline which has been severed in the vicinity of the buckle arrestor. By severing the pipe in this location and utilizing the buckle arrestor to latch the clamp on to the pipe, a simple and reliable clamp is used. A method to recover such a subsea pipeline by severing the pipeline in the vicinity of the buckle arrestor and utilizing such a clamp is also disclosed.

Subsea pipeline recovery clamp

The present invention provides an accurate measurement of the waxy buildup in pipeline by injecting an X-ray opaque material into the pipeline, then X-raying the line at three or more points in order to get an average wax thickness.

Waxy buildup measurement

A method and apparatus for measuring the motion of tall structures, particularly offshore platforms. The method comprises disposing a number of accelerometer packages in a tubular member attached to a vertical or near vertical member of the structure. Each package contains three accelerometers having their axes dipsosed in an orthogonal arrangement. The apparatus includes means for installing and removing a plurality of packages from tubular members or chutes that are permanently attached to the structure.

Platform motion measuring system

Method of prevent marine growth on the shallow water portions of platform legs by applying a polymer coating to the legs and covering the polymer with a copper-nickel alloy anti-fouling covering.

Growing community of inventors

Montgomery, TX, United States of America

Thomas E Long