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WO2016074050A1 - Élément flottant pour système d'ancrage de câbles immergés d'exploration pétrolière - Google Patents

Élément flottant pour système d'ancrage de câbles immergés d'exploration pétrolière Download PDF

Info

Publication number
WO2016074050A1
WO2016074050A1 PCT/BR2015/000111 BR2015000111W WO2016074050A1 WO 2016074050 A1 WO2016074050 A1 WO 2016074050A1 BR 2015000111 W BR2015000111 W BR 2015000111W WO 2016074050 A1 WO2016074050 A1 WO 2016074050A1
Authority
WO
WIPO (PCT)
Prior art keywords
float
floating element
connect
floating
lines
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/BR2015/000111
Other languages
English (en)
Portuguese (pt)
Inventor
Leandro CERQUEIRA TROVOADO
Rogeiro DINIZ MACHADO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Petroleo Brasileiro SA Petrobras
Original Assignee
Petroleo Brasileiro SA Petrobras
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 Petroleo Brasileiro SA Petrobras filed Critical Petroleo Brasileiro SA Petrobras
Publication of WO2016074050A1 publication Critical patent/WO2016074050A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/48—Sea-anchors; Drogues
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/04—Fixations or other anchoring arrangements
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers

Definitions

  • the present invention relates to a floating element for anchor systems of submerged oil exploration lines. More specifically, the present invention relates to a floating element used as an intermediate supporting element arranged submerged between a floating oil production and storage platform and the seabed.
  • FPSO oil production and storage vessel
  • Floating platforms are connected to subsea exploration equipment by pipeline lines, and such lines are connected to anchor systems that enable their proper positioning relative to the floating platform and the seabed,
  • the known mooring systems may have intermediate floating elements "also known as” balls * to act as a kind of submerged support arranged in the body of water to support and fixing lines (pipes, risers, etc.). These elements have the The objective is to reduce the dynamic excitations transmitted by the floating platform movement.
  • a known and widely used intermediate floating element comprises a ring shaped intermediate float. Occurs This type of float has low rotational stability, which has an impact on both installation and operation of the lines.
  • these buoys generally require the use of high rigidity tendons, commonly of high weight wire ropes, which eventually require special vessels for lifting and offshore handling.
  • This type of equipment has high cost and environmental restrictions of operation.
  • the high stiffness requires Uno adjustment in the length of the tendons after installation to achieve adequate load distribution with the adjacent tendon. As the adjustment of the tendon length is performed by subsea hydraulic jacks, the operating costs are even higher.
  • WO 00/31372 An attempt to provide an improved intermediate element is described in WO 00/31372.
  • This document shows a support element comprising two anchor straps connected by a beam element at whose ends are provided tanks that act as balls.
  • the beam element basically comprises two tubular structures and has bows and hooks for securing derisers lines.
  • the present invention achieves these and other objects by means of a floating element for anchor systems for submerged oil exploration lines comprising a central float and two end floats.
  • the center float has an elongated beam shape and is configured to connect piping lines that connect to a floating platform and piping lines that connect to the subsea bed.
  • the first end float which is attached to one end of the center float, is configured to connect a first set of anchor tendons.
  • the second end float which is attached to the other end of the central float, is configured to connect a second set of anchor tendons.
  • the floating element has high rotation stability, eliminating the use of tendons of high rigidity.
  • the first and second sets of anchor tendons are made of synthetic cables. Preferably polyester cables.
  • the present invention provides a number of advantages associated with cost savings and ease of operation.
  • each end float has a substantially trapezoidal shape, with the upper trapezoidal side face to the corresponding end of the centrai float.
  • the floats comprise compartmentalized hulls in watertight tanks, which allow for a balance of weights by controlling the flooding capacity of the compartments.
  • Figure 1 is a perspective view of a floating element according to the preferred embodiment of the present invention.
  • Figure 2 is another perspective view of the floating element according to the preferred embodiment of the present invention.
  • Figure 3 is another perspective view of the floating element according to the preferred embodiment of the present invention with piping and anchor lines attached to the device;
  • Figure 4 is yet another perspective view of the floating element according to the preferred embodiment of the present invention with piping and anchor lines attached to the device;
  • the floating element comprises at least three floats, one elongated central float 1 and two end floats 2, 3 forming a submerged ball. that is anchored to the seabed by tendons.
  • the floating element acts as an intermediate element between the floating platform and the seabed.
  • the central float 1 has an elongated beam shape which allows for high stability of rotation.
  • the end floats 2, 3 each have a substantially trapezoidal shape, with the upper face of the trapezius facing the corresponding end of the central float 1,
  • the three floats 1, 2 and 3 are formed by compartmentalized hulls in watertight tanks, so that the flooding capacity can be controlled to achieve a weight balance.
  • Central float 1 is configured to connect piping lines that are connected to the floating platform (lines 4 in figures 3 and 4) and piping lines that are connected to the subsea bed (lines S in figures 3 and 4).
  • Each of the end floats 2, 3 is configured to connect a set of tendons used for anchoring the floating element to the sea floor. Due to the high rotational stability of the floating element of the present invention, the tendons used may be synthetic cables, such as polyester cables,
  • the high rotational stability is obtained by increasing the vertical distance between the buoyancy center of buoyancy 1, 2, 3 and the sum of forces acting on the subsea line system (eg, the weight of the risers, flexible jumpers and anchor tendons).
  • Synthetic cable tendon lengths can be achieved using only the anchor handling tug supply vessel (AHTS) type winch AHTS type vessels allow for less costly operation and with fewer restrictions imposed by environmental considerations.
  • AHTS anchor handling tug supply vessel
  • Another advantage of using synthetic cables is related to the monitoring of loads acting on the tendons. Due to the low rigidity of the synthetic cables, the load can be indirectly obtained by deforming the tensioned cable.
  • a first set of synthetic cable tendons 6 is connected to one of the end floats 2 and a second set of synthetic cable tendons 7 is connected to the other of end floats 3 ,
  • Synthetic cable tendon assemblies 6, 7 are connected to the seabed by anchor meb, such as torpedo piles.
  • anchor meb such as torpedo piles.
  • the construction of the floating element of the present invention has an intrinsic advantage associated with the standardization of its component elements, since such components can be used regardless of the arrangement of risers and jumpers, the amount and dimensions of flexible or rigid lines, and regardless of characteristics. the water slide where the system will be used.
  • the floating element construction of the present invention allows for great flexibility in the arrangement and arrangement of piping lines 4, 5 and anchor tendons 6.7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Traffic Control Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

La présente invention concerne un élément flottant pour systèmes d'ancrage de câbles immergés d'exploration pétrolière, cet élément flottant étant utilisé comme élément de soutien intermédiaire disposé de manière immergée entre une plateforme flottante de production et de stockage de pétrole et le fond de la mer. L'élément flottant de la présente invention comprend un flotteur central (1) en forme de poutre allongée, conçu pour relier les câbles de tubage reliés à une plateforme flottante (4) et les câbles de tubage reliés au lit sous-marin (5) ; un premier flotteur d'extrémité (2) situé à une extrémité du flotteur central (1) et permettant la fixation d'un premier ensemble de cordons d'ancrage (6) ; et un second flotteur d'extrémité (4) situé à l'autre extrémité du flotteur central (1) et permettant la fixation d'un second ensemble de cordons d'ancrage (7).
PCT/BR2015/000111 2014-11-14 2015-07-28 Élément flottant pour système d'ancrage de câbles immergés d'exploration pétrolière Ceased WO2016074050A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR102014028326-5 2014-11-14
BR102014028326A BR102014028326A2 (pt) 2014-11-14 2014-11-14 processo de detecção automática de ocupação de vagas de estacionamento por veículos

Publications (1)

Publication Number Publication Date
WO2016074050A1 true WO2016074050A1 (fr) 2016-05-19

Family

ID=55953476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2015/000111 Ceased WO2016074050A1 (fr) 2014-11-14 2015-07-28 Élément flottant pour système d'ancrage de câbles immergés d'exploration pétrolière

Country Status (2)

Country Link
BR (1) BR102014028326A2 (fr)
WO (1) WO2016074050A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423984A (en) * 1980-12-29 1984-01-03 Mobil Oil Corporation Marine compliant riser system
US5505560A (en) * 1993-10-26 1996-04-09 Offshore Energie Development Corporation (Oecd) Fluid transfer system for an offshore moored floating unit
GB2295408A (en) * 1994-10-12 1996-05-29 Mobil Oil Corp Marine steel catenary riser system
WO2000031372A1 (fr) * 1998-11-23 2000-06-02 Foster Wheeler Energy Limited Support flottant ancre pour systeme de tubes ascenseur relie a un vaisseau de production flottant
US6109833A (en) * 1997-08-01 2000-08-29 Coflexip Device for transferring fluid between equipment on the seabed and a surface unit
WO2003097990A1 (fr) * 2002-05-22 2003-11-27 Technip France Systeme de colonne montante reliant deux installations sous-marines fixes a une unite de surface flottante

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423984A (en) * 1980-12-29 1984-01-03 Mobil Oil Corporation Marine compliant riser system
US5505560A (en) * 1993-10-26 1996-04-09 Offshore Energie Development Corporation (Oecd) Fluid transfer system for an offshore moored floating unit
GB2295408A (en) * 1994-10-12 1996-05-29 Mobil Oil Corp Marine steel catenary riser system
US6109833A (en) * 1997-08-01 2000-08-29 Coflexip Device for transferring fluid between equipment on the seabed and a surface unit
WO2000031372A1 (fr) * 1998-11-23 2000-06-02 Foster Wheeler Energy Limited Support flottant ancre pour systeme de tubes ascenseur relie a un vaisseau de production flottant
WO2003097990A1 (fr) * 2002-05-22 2003-11-27 Technip France Systeme de colonne montante reliant deux installations sous-marines fixes a une unite de surface flottante

Also Published As

Publication number Publication date
BR102014028326A2 (pt) 2016-08-09

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