Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Other

Aker Subsea As

Jean Guesnon

Gérard Papon

Christian Gaillard

Emmanuel Persent

Charles Naville

Claude Mabile

Andre Laurencin

Patrick Meynier

Guy Pignard

Marcel Le Comte

Pierre Schaeffner

Yann Poirette

Edmond Daniel

Louis Barge

Claude Klopfeinstein

Oystein Luktvasslimo

Christophe Blois

G&eacute;rard Papon

Pierre Guerin

Jaan Anderson

Olivier Vaisberg

Florence Richard

Bjorn Paulshus

The invention relates to a high-pressure pipe element having at least two metal tubesreinforced by hoopsand, the ends of the tubes being bare. The tubes are assembled end to end by a weldof the bared ends. A sleevecovers the weldas some of the hoopingandof each tube, forming an annular space between the bare ends of the tubes and the sleeve, said space being filled with a setting material The invention also relates to manufacturing the high-pressure pipe element.

High-pressure pipe element having an assembly of hooped tubes and method of manufacture

The offshore drilling system comprises a floating drilling vessel, a well drilled in the sea bottom, a tubular riser extending the well up to the floating vessel, well sealing elements fastened to the end of the riser at the level of floating vessel. The riser comprises tubular elementsconnected to one another by connectorsdesigned to withstand the internal pressure of the well. Tubularscomprise a metallic tubular body hooped by windings of fibers coated with a polymer matrix. The riser comprises several sections, each section consisting of tube elements whose hoop stress is determined as a function of the depth at which the section lies and of the mechanical strength of said metallic tubular body.

Offshore drilling system comprising a high-pressure riser

A riser pipe for drilling an offshore well comprises a main tube extending the well up to a floating support, an auxiliary line being arranged parallel to main tube (). The auxiliary line comprises tubular sections () made of steel and assembled end to end with a sliding fit by means of a tubular end part (). According to the invention, a material, a titanium alloy for example, having an elastic limit at least 25% higher than that of the steel tubular sections (), is selected to manufacture said end part (), and the end part as well as the end of said sections are dimensioned by taking account of the elastic limit of said material so as to reduce the sealing section of the end part.

Method for lightening a riser pipe with optimized wearing part

A connector includes a male flange and a female flange allowing to assemble a main tube and auxiliary line tubes. A locking ring assembles the male flange and the female flange. The locking ring is mounted mobile in rotation on the outer periphery of the male flange while cooperating with the outer periphery of the male and female flanges.

Riser section connector with flanges and external locking ring

The invention relates to a riser pipe section () comprising a main tube (), at least one auxiliary line element () arranged substantially parallel to said tube (), the ends of the main tube comprising connection means allowing longitudinal stresses to be transmitted and the ends of the auxiliary line element comprising linking means allowing longitudinal stresses to be transmitted, said linking means comprising at least one locking pin ().

Riser pipe with rigid auxiliary lines assembled by pins

The connector comprises a male flangeand a female flangeallowing to assemble a main tube and auxiliary line tubes A locking collarand a locking ringassemble the male flange and the female flange. Locking collaris mounted mobile in rotation on the outer surface of the male flange while cooperating with the outer surfaces of the male and female flanges. Locking ringis mounted mobile in rotation on the male element of the connector while cooperating with the inner surface of the female connector.

Riser section connector with flanges, internal locking ring and external locking collar

The invention relates to a riser pipe section comprising a main tube (), at least one auxiliary line element () arranged substantially parallel to said tube (), characterized in that the ends of main tube () comprise connecting means () allowing longitudinal stresses to be transmitted and in that the ends of auxiliary line element () comprise linking means (-) allowing longitudinal stresses to be transmitted.

Riser pipe with rigid auxiliary lines

The invention relates to a riser pipe section comprising a main tube (), at least one auxiliary line element () substantially parallel to said main tube () and at least two fastening means () that connect the ends of said element () to main tube (). The section is characterized in that fastening means () allow longitudinal stresses to be transmitted from said element () to main tube () and in that at least one of fastening means () allows at least a rotating motion of said element () in relation to said main tube (), the rotating motion following an axis perpendicular to the plane passing through axis () of the main tube and through the axis of auxiliary line element ().

Riser pipe with auxiliary lines mounted on journals

The present invention relates to a method of dimensioning a riser assembly () intended for offshore drilling, connecting an underwater wellhead () to a floating support () comprising a main pipe (), wherein the following stages are carried out:

Method of dimensioning a drilling riser

A connector () for joining two pipe sections () and () making up a riser includes a male tubular element () and a female tubular element () which fit into each other and have an axial shoulder () or (). Locking ring (), mounted mobile in rotation on the male element () or the female element (), includes studs which cooperate with the studs of female element () or the male element () so as to form a bayonet connection. The male () and female () tubular elements include teeth and cavities, the teeth of one of the elements fitting into the cavities of the other element so as to lock in rotation one of the elements in relation to the other.

Connector for high-pressure riser

The present invention relates to an instrumentation assembly intended for an offshore riser () operated from a floater (). It comprises a central processing unit (PC) connected by conducting cables () to: The measurements are synchronized with one another, managed and recorded by means of the central processing unit.

Instrumentation assembly for an offshore riser

The method relates to a riser comprising a main tube and auxiliary lines. Each tubular element forming the auxiliary lines is fastened at one end by a complete link with the central tube and at the other end by a link allowing a longitudinal play J with the central tube. The method provides adjustment of play J so that, on the one hand, during conventional drilling operations, the elements forming the auxiliary lines slide in relation to the central tube and, on the other hand, during show control or testing operations, the elements forming the auxiliary lines form hyperstatic assemblies with the central tube. The method thus allows to prevent buckling of the peripheral lines when they are under pressure because they work under hyperstatic conditions.

Method for dimensioning a riser element with integrated auxiliary lines

A method of dimensioning a hooped tube intended to carry a fluid under pressure. The hooped tube consists of a metal tube and of a reinforcing element wound around the metal tube so as to hoop the tube. In a first stage, the method consists in determining, according to a first series of criteria, the characteristics of the metal tube without the hooping reinforcement that is wound around it at the end of the manufacture process. The first series of criteria includes the resistance to all the mechanical stresses applied to the hooped tube, i.e. compressive, bending, collapse and tensile stresses, with the exception of the radial stresses due to the internal pressure. In a second stage, the method consists in determining the hooping characteristics so as to obtain a determined prestress field in the wall of the hooped tube.

Hooped tube dimensioning method

The present invention relates to a riser pipe element comprising a main tube ( ), connection means ( ) at both ends, at least one auxiliary pipe length ( ) arranged substantially parallel to the tube. The auxiliary pipe length is secured at both ends to the connection means of the main tube so that the longitudinal mechanical stresses to which the connection means are subjected are distributed in the tube and in the pipe.

Riser element with integrated auxiliary pipes

A high-pressure pipe element having hooped tube sections for making lines referred to as kill lines and choke lines that equip oil drilling installations, notably offshore. The element includes several hooped tube sections ( to ) connected by connecting parts ( ).

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Chatou, France

Jean Guesnon