Institut Francais Du Pe'trole

Other

Aerospatiale Societe Nationale Industrielle

Aerospatiale

Societe Nationale Industrielle Et Aerospatiale

Institute Francois Du Petrole

Areospatiale

Institut Francais Du Petrole Et Aerospatiale

Pierre Odru

Charles P Sparks

Marcel Auberon

Jean-Francois Fuchs

Michel Huvey

Jean Falcimaigne

Patrice Joel Jung

Guy Metivaud

Jean-Louis Tisne

Francis Biolley

Jos&eacute; Mallen Herrero

William Hudson

Beno&icirc;t Amaudric Du Chaffaut

Jean-Jacques Thouraud

Olivier Andrieux

Jacqes E Chaussepied

Jacques Behar

A structure of a multilayer tube includes at least one layer made of a composite material ( ) having reinforcing fibers embedded in a polymer matrix, and at least one sealing sheath ( ) made of a low-permeability polymer material. The tube has a metal carcass ( ) interior to the sheath. In a variant, the carcass is made of stapled steel tape ( ).

Composite tube comprising an inner casing

A floating system for very deep water includes a floating structure ( ) subject to the external loadings ( ) inducing stresses, the floating structure ( ) being held in position on the sea bed by one or several tensioned lines ( ) made of a material having given mechanical properties. The tensioned line or lines ( ) are made of a material that is not very sensitive to fatigue stresses and the tensioned line or lines are sized in a manner independent of the fatigue phenomena associated with the dynamic behavior of the floating system under the effect of external loadings.

Floating system with tensioned lines

The invention concerns a method for the continuous production of a flexible tube body from two stapled wires ( ) individually bent in bending means ( ), three stitches, unsupported by a mandrel, and such that wires ( ) remain constantly in contact so as to optimize their resistance to external pressure. Bending means ( ) can be arranged with respect to each other without affecting the bending adjustment. The method consists in stapling the two spirals by elastically deforming the turns so that one crosses the other to cause the wires to overlap partially. The invention also concerns an equipment for producing a flexible tube body.

Process for manufacturing a flexible continuous tube

A flexible piping structure has in combination, from the axis of the pipe towards the exterior, a cylindrical, metal inner sealing tube, a layer resistance to internal and external pressures and a sealing sheath made from extruded plastics material. In one embodiment, an intermediate layer of plastics material is arranged between the tube and the pressure-resistant layer.

Flexible piping structure having a continuous metal inner tube

A flexible piping structure has in combination, from the axis of the pipe towards the exterior, a cylindrical, metal inner sealing tube, a layer resistant to internal and external pressures and a sealing sheath made from extruded plastics material. In one embodiment, an intermediate layer of plastics material is arranged between the tube and the pressure-resistant layer.

A drilling and/or production riser includes on at least part of the length thereof, a stiffener suited to withstand strains induced by the stresses transmitted by the marine environment, those induced by said supporting and guide device, and the strains due to the weight of the loads supported by said stiffener. System intended for production of petroleum effluents from a production site, such as one or more production wells, to a floater having at least one assembly allowing transfer of the effluents from at least one of the production wells to the floater. The assembly includes a production riser equipped on at least part of the length thereof with a float and with at least one stiffener situated above the float and suited to withstand strains induced by the stresses transmitted by the marine environment, those induced by said supporting and guide device and the strains due to the weight of the loads supported by said stiffener.

Production riser equipped with a suitable stiffener and with an

A composite material tube, withstanding the internal pressure, and comprising at least two layers of pressure reinforcement fibers, or pressure resistant layers, wound at an angle at least equal in absolute value to 70.degree., with respect to the center axis of the tube. The two layers both undergo radial expansion under an effect of the pressure, with one of these two layers being inside the other. A circumferential modulus of elasticity of the external layer is greater than the circumferential modulus of elasticity of the internal layer.

Tube comprising composite layers with different modulii of elasticity

Process for manufacturing a variable stiffness line and associated

A tube includes a tubular part of composite material with a thermosetting resin matrix. A metallic end coupling member is connected to one end of the tubular part and is engaged at least partially inside the tubular part. A tubular covering member of impermeable material is placed over the inner face of the tubular part and is integrally attached to the tubular part. An impermeable joint is formed between the end coupling member and the covering member. The inner face of the tubular part is covered by the end coupling member and the covering member.

Tube of composite material for drilling and/or transport of liquid or

A method of joining a tube of composite material and a tubular metal fitting includes, winding filaments of pre-impregnated fibers to produce a tube with a longitudinal axis. The fibers that provide tensile strength for the tube are at a tensile fiber angle relative to the longitudinal axis. A tubular metal fitting is introduced at least partially into an end of a tube section, with inner and outer parts of the fitting being located inside and outside of the tube section. The inner and outer parts are secured by inserting penetrating elements extending radially through the tube section and the parts of the fitting. The penetrating elements are arranged in uniform circumferential alignments which are equally spaced from each other along the longitudinal axis. Each circumferential alignment defines an alignment plane perpendicular to the longitudinal axis and spaced by a distance which is a function of an integer, the number of circumferential alignments, the interval between two consecutive penetrating elements in the same circumferential alignment and the tensile fiber angle.

Method for mechanical joining a tube of composite material and a

A composite material tube, substantially insensitive to the variations of elongation under the effect of the internal pressure, comprising a number n of stable layers of reinforcement fibers, the fibers of each layer (i) being placed at the same winding angle in absolute value, referenced theta, with respect to the axis of the tube with an equal proportion of fibers wound at said angle in one direction (.vertline.theta.vertline.) as fibers wound in the opposite direction (-.vertline.theta.vertline.), the fibers of each layer being buried in a matrix which adheres to these fibers. The fibers of the same layer and the associated matrix have a volume referenced Y, the parallel fibers of the same layer and the associated matrix having overall a modulus of elasticity in the natural direction of the fibers, referenced E, wherein said n layers of fibers comply as a whole with the following relationship:

Composition material tube substantially insensitive to the variations of

The tube, composed of a structural portion (1) of composite fibers encapsulated with thermosetting matrixes playing the part of a binder and obtained by filament winding, is provided with at least one inner coating (2) of a fibrous composite material impregnated with a thermoplastic binder, which is directly adjacent to the tubular portion formed by the structural portion (1) with the thermosetting binder. Application to oil production tubings.

Tube of composite material with a fibrous thermoplastic coating and

Fibers, which are substantially longitudinally profiled, are wound both around a cylindrical mandrel and a metallic double cone-shaped tip which is engaged onto said mandrel. Said fibers are turned back about studs distributed on a ring which is mounted on a threaded portion extending from the tip, whereupon said longitudinal fibers are binded thereto by means of circumferential fibers before the polymerization process of the tube has been completed. The composite tubes thus produced may be used in off-shore oil prospecting.

Method for affixing a metallic tip to a tube made of composite wound

A variable rigidity element is provided to surround and protect a riser or transfer column installed at a water bottom and extending usually to a platform associated with production of hydrocarbons. The element is composed of a number of shells which surround the riser and two or more concentric rings of shells may be provided. The shells, preferably made of metal, are shaped to avoid contact and have an ogive end remote from the bottom installation.

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Fontenay Sous Bois, France

Pierre Odru