Compagnie Francaise Des Petroles

Yves R Le Hir

Bruno J De Sivry

Michel J Jegousse

Bernard G Sudreau

Daniel Josien

Olivier R Anselme

Meichel J Jegousse

The invention relates to the setting-down of a pipe in the sea using a setting-down line. The line is provided with sinkers at its lower end portion which tension the line and allow a reduction in the angle of general inclination of the line with the vertical and thus a reduction in the length of the line.

Temporarily terminating laying of underwater pipe line

An internal mandrel (22) cooperating in the operation of joining two successive lengths of tubing by welding, and it is characterized in that this mandrel comprises zones (25, 26, 27) separated longitudinally and serving respectively for matching, welding, and welding checking, and means of displacement of the mandrel (22) by a step, enabling the latter to present the said zones in succession in front of one and the same working station.

Internal mandrel used in an operation of butt joining two lengths of

A soft retaining gripper for gripping a surface while stresses are exerted in a longitudinal direction parallel to the surface between the gripper and the surface, comprises a jaw and an inflatable flexible bladder carried by the jaw, the bladder being in use inflated to grip the surface. To prevent creep of the gripper in use, a wall is associated with the bladder and extends between the bladder and the surface, the wall being made of a composite anisotropic material comprising elongate elements which are oriented to extend in the longitudinal direction and are practically inextensible and a flexible synthetic resin in which the elongate elements are embedded, the elongate elements being anchored to the jaw at at least that end in the direction of which creep might otherwise occur.

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Nantes, France

Yves R Le Hir