Institut Francais Du Pe'trole

Coflexip

Commissariat a L'energie Atomique

Institut Francais Du Petrole & Coflexip

Daniel Averbuch

Philippe Espinasse

Jean-Marc Leroy

Cédric Le Cunff

Marie-Hélène Klopffer

Christian Wittrisch

Alain Coutarel

Pierre Ferdinand

François Dupoiron

Patrice Joël Louis Jung

Fran&ccedil;ois Dupoiron

Laurent Maurin

Gilles Perrin

Patrice Jo&euml;l Louis Jung

Romain Lepoutre

The present invention relates to a method and to a system for limiting vortex-induced vibrations on a riser suspended at one end from a support and subjected to substantially transverse fluid flows. The system comprises suspension means () for hanging the riser from the support, which include displacement means for moving the end in a transverse direction in relation to the principal axis of the riser.

System and method for limiting vortex-induced vibrations on an offshore production riser

A flexible tubular pipe comprising a metal carcass helically coiled about a longitudinal axis of said flexible pipe and the carcass comprises a seamed profiled hollow tube.

Flexible tubular pipe

The present invention relates to a temperature-compensated optical fiber pressure detector for detecting pressure variations in at least one medium in relation to a reference medium such as the atmosphere or a medium where a back pressure prevails. The detector essentially comprises a deformable element () such as a bellows () exposed on one side to the reference medium and on the opposite side to the pressure to be measured, an optical fiber portion (F) including at least one optical grating such as a Bragg grating (B), which is connected on one side to deformable element () and on the opposite side to a fixed point. The optical fiber portion is subjected to a prestress by a device () and its elongation varies with the displacements of the deformable element. The device applies the prestress to optical fiber portion (F) between deformable element () and another fixed element () isolated from the medium by a rigid housing (). An optical system () detects the deformations undergone by said optical grating in response to the pressure variations undergone by the deformable element. Another part (F) of the optical fiber that is not subjected to stresses (or another non-stressed fiber portion connected to the first one) preferably comprises another similar optical grating (B) also allowing measurement of the temperature variations. By duplicating the deformable elements and possibly the stress applying device (), differential pressure variations can also be measured. Such a detector can notably be applied to pressure and temperature measurements in wells where difficult conditions prevail.

Pressure sensor with temperature compensated optical fiber

The present invention relates to a flexible pipe structure wherein transverse displacement caused by buckling of the elongate elements of a tensile armouring layer when the pipe is being laid or used in deep sea is limited. The invention aims to reduce the play between the elongate elements of the tensile armouring layer so as to limit transverse displacement possibilities while providing the pipe with the required flexibility and mechanical characteristics. The elongate elements can freely move longitudinally in relation to one another to ensure flexibility of the pipe.

Flexible pipe with high axial compression strength and method for making same

A flexible metal tube with closed section and a flexible pipe comprising such a metal tube, comprising a strip with substantially constant thickness and wound helically around an axis, the strip includes at least a closed section having walls formed by portions of a common turn of the strip, the closed section includes an upper wall and a lower wall and the section is arranged at one end of said strip while the other end terminates in a free edge. The closed section is trapezoidal in cross-section. A bulge radially oriented towards the upper wall of the closed section is provided between the closed section and the free edge of the stirrup. The invention is in particular applicable to flexible tubular pipes.

Flexible metal tube with closed section and flexible pipe comprising same

The present invention relates to a method for determining a flexible pipe meeting specifications and consisting of at least one of the following elements: a body ( ), a sealed sheath ( ), a pressure layer ( ), a hoop ( ), an armoring layer ( ), an insulating material layer.

Method for determining a flexible pipe structure

The present invention relate to a device and to a method for handling a pipe (,) comprising at least one metal tube plastically wound on a drum (,). The invention comprises an adjustable straightening system (,) controlled by at least one series of means (,) 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 &ldquo;coiled tubing&rdquo; used in oil wells for drilling or well servicing.

Growing community of inventors

Rueil Malmaison, France

Daniel Averbuch