+

WO1997030265A1 - Conduite de production en mer, et procede de pose correspondant - Google Patents

Conduite de production en mer, et procede de pose correspondant Download PDF

Info

Publication number
WO1997030265A1
WO1997030265A1 PCT/NO1997/000039 NO9700039W WO9730265A1 WO 1997030265 A1 WO1997030265 A1 WO 1997030265A1 NO 9700039 W NO9700039 W NO 9700039W WO 9730265 A1 WO9730265 A1 WO 9730265A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
seabed
suspended
bottom section
production tubing
Prior art date
Application number
PCT/NO1997/000039
Other languages
English (en)
Inventor
Knut Von Trepka
Per Olav Halle
Original Assignee
Kværner Oilfield Products A.S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kværner Oilfield Products A.S filed Critical Kværner Oilfield Products A.S
Priority to AU18144/97A priority Critical patent/AU1814497A/en
Priority to BR9707536A priority patent/BR9707536A/pt
Publication of WO1997030265A1 publication Critical patent/WO1997030265A1/fr
Priority to NO983668A priority patent/NO319277B1/no

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/013—Connecting a production flow line to an underwater well head
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations

Definitions

  • the present invention relates to an offshore production tubing system where the production tubing runs between at least one wellhead Christmas tree on the seabed and a vessel floating on the surface, which vessel is capable of limited movement in all directions in the horizontal plane within a defined area, the production tubing is divided into two sections: one section lying on the seabed and emerging from a Christmas tree, and one section which is "suspended" in the water and terminates in the vessel.
  • the invention also relates to a method for laying production tubing between a Christmas tree on the seabed and a surface vessel which, after the tubing has been laid, is capable of limited movement in all directions in the horizontal plane, which production tubing is divided into two sections: a bottom section and a suspended section.
  • the present production tubing system has been developed for floating production units and forms a connection between a Christmas tree on the seabed and a floating vessel.
  • the use of floating production units is ever-increasing because of their cost efficiency, especially in deeper waters.
  • riser systems In the case of floating production systems, special riser constructions are used so as to allow the floating vessel to move to all the well sites for normal operations and to move to the side during an emergency situation, should one arise.
  • the riser systems commonly used are flexible risers made of steel-reinforced thermoplastic pipes. These risers have a limited useful life and are extremely expensive. It is difficult to use flexible risers, in particular in the case of oilfields with high temperature and high pressures. The use of dynamic metal risers has therefore been considered for the next generation of offshore oilfields.
  • a lazy wave or steep S -configuration will usually be used.
  • the steep S has a riser base with a horizontal connection to the static flowline and a vertical connection to the riser.
  • the lazy wave configuration can be installed in one length by using flanges.
  • the riser base in this solution is a block weight which is anchored to a 90° bend.
  • the disadvantages of this steep S-configuration are extra installation time in order to carry out two pipeline pull-ins, extra equipment on the riser base and finally the fact that the vertical riser has a fixed support. This last-mentioned point means that high bending moments must be taken close to the vertical connection point.
  • risers Installation of risers.
  • the installation can be carried out by a vessel using reels or a carousel, where the riser can be welded on site, or it can be towed out in a continuous length.
  • the 90° bend causes problems for these solutions which result in a need for a subsea connection.
  • a production tubing system of the type mentioned above is provided, which is characterised in that the bottom section and the suspended section are connected at one point and at some distance from the seabed, that either the bottom section or the suspended section close to the connection point describes an elbow, and that the suspended section is compliant anchored to the seabed in the vicinity of the connection point, the pipes thereby being held under tensile load.
  • the pipes may to advantage be non-flexible and be made of titanium, steel or stainless steel (Duplex).
  • a method of the type mentioned above is also provided which is characterised in that the bottom section is laid on the seabed substantially rectilinearly and is secured at one end thereof to the Christmas tree, that the suspended section is laid in a catenary form and floating with the aid of floats in the water and is secured at one end thereof to the vessel, whilst at its other end it is secured non-rigidly to a seabed anchor, and with the pipe end at some distance from the seabed, and that the pipe ends are pulled towards each other and connected at said distance from the seabed, the compliant of the seabed anchor and the elasticity of the rigid pipes being utilised to allow this without the introduction of spot loads in the pipes, and also to keep these under tension.
  • the pipe ends are pulled towards one another by means of a pull-in tool which is put in place by an ROV.
  • the pull-in tool can be connected to the end of the suspended section, whereupon a line is positioned and secured with the aid of an ROV to the end of the bottom section before the pull-in tool is put into operation and pulls the pipes towards one another and carries out the connection.
  • a line is positioned and secured with the aid of an ROV to the end of the bottom section before the pull-in tool is put into operation and pulls the pipes towards one another and carries out the connection.
  • the method can be used to replace only the bottom section in a production tubing system, where the pipes are disconnected and the end of the bottom section is allowed to fall in a controlled manner towards the seabed, whereupon the other end of the bottom section is detached from the Christmas tree and removed, and a replacement bottom section is installed according to the previously disclosed method.
  • a method is also provided for replacing only the suspended section in a production tubing system, where the pipe ends are disconnected and the end of the bottom section is allowed to fall in a controlled manner towards the seabed, whereupon the other end of the suspended section is detached from the vessel and removed, and a replacement suspended section is installed according to the previously disclosed method.
  • Fig. 1 shows the production tubing system according to the invention during deployment between a Christmas tree on the seabed and a floating vessel;
  • Fig. 1A shows the actual connection point between the bottom pipe section and suspended pipe section according to Fig. 1 in more detail
  • Fig. 2 shows the production tubing system ready connected
  • Fig. 2A shows in more detail the elbow portion of the suspended section at the connection point.
  • Fig. 1 shows a floating drilling and production vessel 8 floating on the water surface 12 above a production Christmas tree 5 which is set down in the seabed 11.
  • a production tubing system consisting of bottom pipe section 1, often called a flowline, and a suspended pipe section 2, often called the riser, which pipe sections are connected 4 in an area which lies just above the seabed 1 1.
  • the suspended pipe section 2 floats in the water and describes an approximate sine shape, or an inverted S configuration between the seabed 1 1 and the floating vessel 8.
  • the lower end of the suspended section 2 is connected to the bottom section 1 by means of a pull- in tool 6 and an ROV.
  • the ROV is controlled from a surface vessel 10 which is in communication with the ROV via a cable 15.
  • Fig. 1 A the pipe ends are drawn together by means of a pull-in tool 6 which is described in detail in Norwegian Patent Application No. NO-920518. A more detailed discussion of this tool will not be given here, apart from mentioning its capacity to pull in a pipe cable towards the tool 6 and connect two adjacent pipe ends.
  • the tool 6 is transported and manoeuvred into place with the aid of a remote-operated vehicle (ROV) which is of a commonly known type, and will not be described in more detail here.
  • ROV remote-operated vehicle
  • the suspended section 2 in its lower end describes an elbow 3 which expediently can form about 90°.
  • the end of the suspended section 2 is anchored to the seabed 11 by means of a block weight 7 and a mooring line 13 which has a point of application 9 to the suspended section 2.
  • This type of anchoring gives the end portion 4 of the suspended section 2 freedom of movement in substantially the horizontal direction.
  • it will help to orient the end flange of the suspended section 2 to align with or point towards the pipe end which is pulled in. This entails that initially it points in the direction of the Christmas tree 5.
  • the elbow 3, together with the anchoring 7, 9, 13, is both orienting and gives the pipe end 4 freedom of movement.
  • Figure 2 like Fig. 1, shows a production tubing system between a Christmas tree 5 on the seabed and a production vessel 8 on the sea surface.
  • the figure is a schematic illustration of two different conditions: one where a suspended section 2 is transporting gas and a second one where the suspended section 2 is filled with water or oil.
  • connection point 4 is shown in more detail in Fig. 2A. I.e., it is the end of the suspended section 2 that is shown, and its orientation.
  • the figure shows an embodiment of the anchoring that is different from that shown in Fig. 1 A.
  • the anchoring consists, as before, of a block weight T and a mooring line 13" and a point of application 9'.
  • the point of application 9' has, however, been moved some way up along the vertical part of the suspended section 2, and the distance from the elbow bend 3 to the point of application 9' can, for example, vary from 1 to 20 meters. This helps to further increase the flexibility in the end 4 of the pipe section 2.
  • this design of the suspended section and the anchoring helps to hold the bottom section 1 under tension. This tension is maintained even if the production platform 8 moves on the sea surface 12 in any direction whatsoever within a defined, limited area.
  • the proposed method sequence is based on the use of a pull-in system including a pull-in tool 6 which is put in place using an ROV.
  • the pull-in tool 6 and the ROV are used both to pull in the bottom section 1 towards the Christmas tree 5 and to pull together the opposite end of the bottom section 1 and the lower end of the suspended section 2.
  • the flowline 1 can be equipped with protecting caps to prevent the penetration of seawater.
  • the caps may have ROV-operated filling ports which allow filling with sea water prior to the pull-in. Rotational orientation of the Christmas tree is necessary within an exactitude of about ⁇ 1°. Different solutions are possible, such as a position indicator in relation to the downhaul wire of the flowline 1.
  • Pull-in is carried out by using the ROV-operated pull-in system in the direction of the Christmas tree. It is important that the riser has sufficient flexibility to allow the pull-in at the Christmas tree end to be about 1 meter.
  • the pull-in can be carried out using the ROV-operated pull-in system between the horizontal bottom section and the suspended section. The bottom section is lifted up whilst the end of the suspended section is forced horizontally until the connection members are brought together and connection with a clamp connector is carried out. The emptying of water and inner pressure testing are carried out. Production can then start.
  • the system is dependent upon a number of functional requirements for the riser system.
  • the suspended section In case of detachment of the Christmas tree, the suspended section must take up necessary kick of about 450 mm. This kick at the Christmas tree should not cause pressure in the bottom pipeline 1.
  • the riser system should create positive tension in the static lines also during detachment.
  • the connection between the bottom section and the suspended section In the event of replacement of a suspended section, the connection between the bottom section and the suspended section should be detachable. This is possible without disengagement between the bottom section 1 and the Christmas tree. In the event that the bottom section is to be replaced, the two connections must be disengaged without retrieving or damaging the suspended section.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Electric Cable Installation (AREA)
  • Earth Drilling (AREA)
  • Pipeline Systems (AREA)

Abstract

Système à tube de production en mer dans lequel le tube de production s'étend entre au moins un arbre de Noël (5) sur le fond marin (11) et un navire (8) flottant à la surface (12). Le navire (8) a une mobilité limitée dans tous les sens dans un plan horizontal et dans une zone déterminée. Le tube de production est composé de deux sections, à savoir une section (1) posée sur le fond marin et sortant d'un arbre de Noël (5), et une section (2) 'suspendue' dans l'eau et s'étendant jusqu'au navire (8). La section inférieure (1) et la section suspendue (2) sont reliées l'une à l'autre en un point (4) écarté du fond marin. L'une ou l'autre de la section inférieure (1) et la section suspendue (2) comporte une partie coudée (3) à proximité du point de raccordement (4), et la section suspendue (2) est ancrée de manière souple au fond marin (11) au voisinage dudit point de raccordement (4), les tubes étant de ce fait soumis à un effort de traction.
PCT/NO1997/000039 1996-02-14 1997-02-11 Conduite de production en mer, et procede de pose correspondant WO1997030265A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU18144/97A AU1814497A (en) 1996-02-14 1997-02-11 Offshore production piping and method for laying same
BR9707536A BR9707536A (pt) 1996-02-14 1997-02-11 Sistema de tubagem de produção ao largo da costa e processos de lançamento de uma tubagem de produção e de substituição da seção de fundo e da seção suspensa de um sistema de tubagem de produção
NO983668A NO319277B1 (no) 1996-02-14 1998-08-11 Produksjonsrørsystem til havs, samt en fremgangsmåte for dets utlegging

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO960581 1996-02-14
NO960581A NO960581L (no) 1996-02-14 1996-02-14 Produksjonsrörsystem til havs, samt en fremgangsmåte ved dets utlegging

Publications (1)

Publication Number Publication Date
WO1997030265A1 true WO1997030265A1 (fr) 1997-08-21

Family

ID=19899049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000039 WO1997030265A1 (fr) 1996-02-14 1997-02-11 Conduite de production en mer, et procede de pose correspondant

Country Status (4)

Country Link
AU (1) AU1814497A (fr)
BR (1) BR9707536A (fr)
NO (2) NO960581L (fr)
WO (1) WO1997030265A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311503B (en) * 1996-03-28 2000-06-14 Alcatel Kabel Norge As Cable anchoring method and device
WO2003033856A1 (fr) * 2001-10-19 2003-04-24 Inocean As Tube prolongateur permettant de relier un navire a un point situe sur le plancher oceanique
EP2326794A4 (fr) * 2008-09-09 2014-08-13 Misc Berhad Système de transfert de conduite fond marin-surface en mer
CN114809947A (zh) * 2022-01-28 2022-07-29 中国海洋石油集团有限公司 一种深水钢悬链线立管安装回接方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766869B1 (fr) * 1997-08-01 1999-09-03 Coflexip Dispositif de transfert de fluide entre un equipement de fond sous-marin et une unite de surface

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO155673B (no) * 1984-09-18 1987-01-26 Norske Stats Oljeselskap Fremgangsmaate til installasjon av stigeroer for gass/olje paa sjoebaserte betongplattformer og anordning til fremgangsmaatens utfoerelse.
FR2591655A1 (fr) * 1983-10-05 1987-06-19 Bechtel Int Corp Installation a conduites montantes de conformation en j pour la production d'hydrocarbures au large des cotes; sa combinaison avec un manifold; procede de raccordement du manifold
US4730677A (en) * 1986-12-22 1988-03-15 Otis Engineering Corporation Method and system for maintenance and servicing of subsea wells
EP0624712A1 (fr) * 1993-05-13 1994-11-17 Cooper Cameron Corporation Ancrage des têtes de puits sous-marines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627542A1 (fr) * 1988-02-24 1989-08-25 Coflexip Dispositif de transfert de fluide entre le fond sous-marin et la surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591655A1 (fr) * 1983-10-05 1987-06-19 Bechtel Int Corp Installation a conduites montantes de conformation en j pour la production d'hydrocarbures au large des cotes; sa combinaison avec un manifold; procede de raccordement du manifold
NO155673B (no) * 1984-09-18 1987-01-26 Norske Stats Oljeselskap Fremgangsmaate til installasjon av stigeroer for gass/olje paa sjoebaserte betongplattformer og anordning til fremgangsmaatens utfoerelse.
US4730677A (en) * 1986-12-22 1988-03-15 Otis Engineering Corporation Method and system for maintenance and servicing of subsea wells
EP0624712A1 (fr) * 1993-05-13 1994-11-17 Cooper Cameron Corporation Ancrage des têtes de puits sous-marines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311503B (en) * 1996-03-28 2000-06-14 Alcatel Kabel Norge As Cable anchoring method and device
US7712539B2 (en) 2001-10-09 2010-05-11 Kjelland-Fosterud Einar Riser for connection between a vessel and a point at the seabed
WO2003033856A1 (fr) * 2001-10-19 2003-04-24 Inocean As Tube prolongateur permettant de relier un navire a un point situe sur le plancher oceanique
EP2326794A4 (fr) * 2008-09-09 2014-08-13 Misc Berhad Système de transfert de conduite fond marin-surface en mer
CN114809947A (zh) * 2022-01-28 2022-07-29 中国海洋石油集团有限公司 一种深水钢悬链线立管安装回接方法

Also Published As

Publication number Publication date
NO319277B1 (no) 2005-07-11
AU1814497A (en) 1997-09-02
NO960581D0 (no) 1996-02-14
NO983668L (no) 1998-08-11
NO960581L (no) 1997-08-15
BR9707536A (pt) 1999-07-27
NO983668D0 (no) 1998-08-11

Similar Documents

Publication Publication Date Title
US5639187A (en) Marine steel catenary riser system
EP1133615B1 (fr) Support flottant ancre pour systeme de tubes ascenseur relie a un vaisseau de production flottant
CA2502521C (fr) Vaisseau d'installation de colonne montante et procede d'utilisation de ce dernier
AU2006266543B2 (en) Riser installation method from an offshore production unit
US8690480B2 (en) Freestanding hybrid riser system
MXPA03011633A (es) Una instalacion de conexion para una tuberia subterranea conectada a un tubo ascendente.
NO324255B1 (no) Spolbar, ettergivende leder og kveilror for innforing av et injektorkveilror i en bronn
US4363566A (en) Flow line bundle and method of towing same
EP0907002B1 (fr) Support pour colonne montante
EP0825325B1 (fr) Support pour colonne montante
US4687377A (en) Method and apparatus for subsea flexible conduit installation
US5702205A (en) Steel catenary riser system for marine platform
US4474507A (en) Flow line bundle and method of towing same
WO1997030265A1 (fr) Conduite de production en mer, et procede de pose correspondant
BR112021010596A2 (pt) Instalando tubos ascendentes submarinos
AU2011253736A1 (en) Loading system
CA1153933A (fr) Canalisations regroupees et methode de touage desdites canalisations p.r.
Huber et al. The Subsea Systems of the Argyll Area fields
Smith The Towed Pipeline Technique as a Means of Installing a Connected Structure
GB2344841A (en) Self-supporting riser system with flexible vessel-connecting section
Goodfellow An overview of subsea construction
Behar et al. The New Concept Of Flexible Pipes. Their Manufacture. Their Applications In The Offshore Oil Industry. Field Experiences.
Renard et al. Specific Features of a New Concept for Deepwater Flow-Line Laying and Connecting and Its Sea Trial in 250 Meters
Baugus Installing a Flowline Using a Snubbing Unit
Benstead et al. The Design and Installation of Dynamic Risers and Umbilicals for the Atlantic Frontiers

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97529233

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载