Method and device for controlling the deformation of an uncoiled metal pipe
AssigneeInstitut Francais du Petrole
InventorsDaniel Averbuch, Gilles Perrin
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Abstract
The present invention relate to a device and to a method for handling a pipe (1) comprising at least one metal tube plastically wound on a drum (2). The invention comprises an adjustable straightening system (5) controlled by at least one series of means (6, 7) for measuring the stresses present in the material of the tube once unwound from the drum. The present invention can be used for floating supports intended for offshore laying of uncoiled rigid tubes or for units referred to as “coiled tubing” used in oil wells for drilling or well servicing.
Claims14
A method for handling a coiled tube (1) comprising at least a metal casing plastically deformed through winding on a cylindrical drum (2), said tube once uncoiled being fed into a straightening system (5), characterized in that at least the following operations are carried out:
- measuring stresses in the tube once uncoiled,
- controlling said straightening system (5) according to said stress measurements so as to obtain, at the straightener outlet, determined stress distribution and level in the metallic wall of said tube.
A straightening device for handling a coiled tube (1) comprising at least a metallic casing plastically deformed through winding on a cylindrical drum (2), said tube once uncoiled being fed into a straightening system (5), characterized in that it comprises at least:
- means (6, 7) for measuring stresses in the tube once uncoiled,
- straightening adjustment means,
- means for controlling adjustment of said straightening device according to said stress measurements so as to obtain, at the straightener outlet, determined stress distribution and level in the metallic wall of said tube.
Dependencies are inferred from the claim text.