EP0983187B1 - Dispositif servant a poser une ancre au fond de la mer - Google Patents

Dispositif servant a poser une ancre au fond de la mer Download PDF

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Publication number
EP0983187B1
EP0983187B1 EP98921926A EP98921926A EP0983187B1 EP 0983187 B1 EP0983187 B1 EP 0983187B1 EP 98921926 A EP98921926 A EP 98921926A EP 98921926 A EP98921926 A EP 98921926A EP 0983187 B1 EP0983187 B1 EP 0983187B1
Authority
EP
European Patent Office
Prior art keywords
anchor
designed
locking
sea bed
implementation tool
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.)
Expired - Lifetime
Application number
EP98921926A
Other languages
German (de)
English (en)
Other versions
EP0983187A1 (fr
Inventor
Sigmund Askestad
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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 Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP0983187A1 publication Critical patent/EP0983187A1/fr
Application granted granted Critical
Publication of EP0983187B1 publication Critical patent/EP0983187B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
    • 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
    • B63B21/26—Anchors securing to bed
    • B63B21/27—Anchors securing to bed by suction
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20—Placing by pressure or pulling power
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0053—Production methods using suction or vacuum techniques

Definitions

  • the present invention concerns an invention for lowering an anchor or similar into the sea bed.
  • the present invention concerns a device for lowering the type of anchor described in the applicant's own Norwegian patent application no. 964139.
  • the stated Norwegian patent application describes an anchor which comprises a polygon with concave side surfaces and which, in the lowered, "anchored” position, has very great anchoring capacity in relation to its weight.
  • Anchors of this type can, as described in the application, be lowered into the sea bed as a pile anchor or as a suction anchor.
  • a suction anchor As a suction anchor, the top of the anchor is closed with a lid or similar so that negative pressure relative to the surroundings can be applied in the cavity space of the anchor in order to pull the anchor down into the sea bed.
  • One disadvantage of self-sucking anchors is that they cannot be pulled further down into the sea bed than to the top of the anchor (the lid).
  • Another disadvantage concerning anchors with concave side surfaces is that they must be reinforced in order to withstand the internal negative pressure, which also increases the weight.
  • GB 2 104 137 A shows a kentledge apparatus for backweighting or counterweighting purposes, especially for driving piles, comprising open ended chambers for placement on or penetration into the soil buy use of vacuum.
  • the present invention represents a device for anchors, in particular anchors consisting of a polygon with concave side surfaces, which makes it possible to pull the anchor below the surface of the sea bed and in connection with which the need for reinforcement is eliminated, thus avoiding any increase in weight.
  • the present invention is characterised by an implementation tool which can be removed from the anchor and which consists of one or more bodies which are closed at the top and preferably cylindrical and which are designed to have negative pressure applied to them and to lower the anchor into the sea bed as stated in the attached claim 1.
  • Fig. 1 shows, seen from the side and from above respectively, an implementation tool 1 in the form of a mainly cylindrical body 1 arranged inside a three-sided anchor body 2 with an anchor line 18.
  • the cylindrical body is closed at the top but open at the bottom and extends expediently from the lower end of the anchor 2 to some distance above this.
  • the body 1 is supported by three brackets 4 which are permanently connected to the anchor at each of its sides and which are arranged to absorb fully or partially the forces which arise in connection with lowering the anchor into the sea bed 28.
  • brackets 4' may be arranged on the side of the body 1 which are designed to rest on the top of the sides of the anchor and which fully or partially transfer the forces in connection with lowering the anchor into the sea bed.
  • a locking mechanism with a locking hook 5 is designed to fasten the cylinder body 1 to the anchor until the anchor has been lowered into the sea bed or to pull the anchor up again.
  • the locking hook 5 is designed to be twisted out of the locked position (dotted line) to the free position (unbroken line) using, for example, an electrically or hydraulically driven motor 3 via a shaft 6 so that the implementation tool is freed from the anchor and can be pulled up.
  • a pump 7, electrically or hydraulically driven, is arranged on the top of the body 1 in order to pump water out of the body during the lowering operation.
  • the pump 7 and the motor 3 are supplied with power via lines 8, 9.
  • Fig. 2 shows, seen from the side and from above, an alternative embodiment in which the implementation tool 11 comprises three preferably cylindrical bodies 10 which are interconnected via a three-sided frame structure 12.
  • the bodies 10 are closed at the top but open at the bottom and are strong enough to withstand the negative pressure and forces which arise while an anchor is lowered into the sea bed.
  • the anchor 13 is fastened in, and can be removed from, the frame structure between the bodies 10 by means of a locking mechanism in the form of rotary hooks 14, one at each corner of the frame, which are designed to engage with a locking bracket 15 on the anchor and are released from this when the anchor is in place and the implementation tool is to be pulled up.
  • the rotary hooks 14 may be driven by an electrical or a hydraulic motor (not shown).
  • water is also pumped out of the bodies 10 using a pump 21 via a pipe system 27 with remote-controlled valves 26.
  • the negative pressure in the bodies 10 can be controlled individually using valves 26 so that the direction of the anchor/implementation tool can be controlled during the lowering operation. This may be necessary, for example, in cases in which the sea bed conditions are uneven.
  • Fig. 3 shows a sequence of drawings of how an anchor 2 is installed from a vessel 17 using the implementation tool 1, in accordance with the present invention, which is of the same type as that shown in Fig. 1 in the case shown.
  • Drawing A in Fig. 3 shows how the implementation tool 1 is lifted into place using a winch device 19, 20 on the vessel 17.
  • the locking device is turned so that the locking hook 5 hooks in under the anchor 2, after which the anchor is lifted and lowered towards the sea bed as shown in drawing B.
  • the present invention is not limited to the use of one or three cylindrical suction bodies. Both two or more than three such bodies may be used, depending on the design of the anchor.
  • the present invention is not necessarily limited to the lowering of anchors but may also be used to lower piles of various designs.
  • Fig. 4 shows a further developed embodiment of the invention shown in Fig. 2 in a sequence of three drawings in positions F, G and H.
  • the frame 12, the suction elements 10, the locking mechanism 14, 15 and the pump and pipe system 26, 27 are the same as shown in Fig. 2. However, in order to be able to lower the anchor 13 further down into the sea bed, a passive jacking mechanism 22, 24 is added.
  • the jacking mechanism comprises three jack bars 22 arranged in guides 24.
  • the jack bars may expediently be of rack or sawtooth type and may be locked in the positions required using a locking mechanism 23 in the form of mobile tongues and/or remote-controlled locking wedges 25.
  • the jack bars are expediently in contact with each of the corners of the anchor and will, when the anchor is lowered, absorb and transfer the forces to the frame structure via the locking mechanism 23 with the locking wedges 25.
  • the implementation tool with the jacking mechanism functions as follows: the anchor 13, with the bars 22 in the upper position, is first lowered some distance into the sea bed by water being pumped out of the bodies 10, see drawing F. The locking mechanism 23 is then released and water is pumped into the bodies 10 to lift the frame and the bodies 10 to a level in relation to the bars 22 as shown in drawing G. The locking mechanism is reactivated and water is pumped out of the bodies 10, whereby the anchor is lowered further into the sea bed as shown in drawing H. This operation may be repeated until the anchor has been lowered into the sea bed by a distance equivalent to the length of the bars.
  • the advantage of this solution is that small anchors may be used as the holding force increases with the penetration (depth) of the anchor in the sea bed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Piles And Underground Anchors (AREA)
  • Earth Drilling (AREA)
  • Revetment (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Claims (5)

  1. Dispositif comprenant un outil de pose et une ancre (2, 13) pour une descente dans le fond de la mer (28), dans lequel l'outil de pose (1, 11) peut être retiré de l'ancre, qui inclut un ou plusieurs corps creux qui sont fermés dans le haut et qui sont de préférence cylindriques (1, 10) et qui sont conçus pour avoir une pression négative appliquée sur ceux-ci et pour descendre l'ancre (2, 13) dans le fond de la mer,
    caractérisé en ce que
    l'ancre est un polygone et l'outil de pose inclut un ou plusieurs corps cylindriques creux (1, 10) qui sont conçus pour être fixés de manière amovible à l'intérieur de l'ancre (2) ou à l'extérieur de l'ancre (13).
  2. Dispositif suivant la revendication 1,
    caractérisé en ce que
    le corps (1) est supporté par des pattes de fixation (4) installées au niveau de l'extrémité inférieure de chacun des côtés de l'ancre et/ou le corps est muni de pattes de fixation (4') qui sont conçues pour reposer sur le haut des côtés de l'ancre (2).
  3. Dispositif suivant la revendication 1,
    caractérisé en ce que
    un corps (1) est conçu pour être fixé à, et pour pouvoir être retiré de, l'ancre (2) en utilisant un dispositif de verrouillage (3, 6, 5) avec un ou plusieurs crochets de verrouillage (5) qui sont conçus pour être bougés d'une position libérée à une position verrouillée pour laquelle le crochet de verrouillage (e) s'étend sous l'ancre.
  4. Dispositif suivant la revendication 3,
    caractérisé en ce que
    le crochet de verrouillage (e) est actionné en utilisant un moteur à commande pneumatique ou électrique contrôlé à distance (3).
  5. Dispositif suivant la revendication 3,
    caractérisé en ce que
    le dispositif de verrouillage comprend des crochets rotatifs (14) installés sur une structure en cadre, lesquels crochets rotatifs sont conçus pour être tournés d'une position libérée à une position verrouillée pour laquelle ils sont en contact avec un crochet de verrouillage (15) sur l'ancre.
EP98921926A 1997-05-21 1998-05-15 Dispositif servant a poser une ancre au fond de la mer Expired - Lifetime EP0983187B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO19972330A NO311624B1 (no) 1997-05-21 1997-05-21 Anordning for nedföring av anker i havbunnen
NO972330 1997-05-21
PCT/NO1998/000148 WO1998052819A1 (fr) 1997-05-21 1998-05-15 Dispositif servant a poser une ancre au fond de la mer

Publications (2)

Publication Number Publication Date
EP0983187A1 EP0983187A1 (fr) 2000-03-08
EP0983187B1 true EP0983187B1 (fr) 2002-02-06

Family

ID=19900730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98921926A Expired - Lifetime EP0983187B1 (fr) 1997-05-21 1998-05-15 Dispositif servant a poser une ancre au fond de la mer

Country Status (9)

Country Link
EP (1) EP0983187B1 (fr)
CN (1) CN1203166A (fr)
AU (1) AU734658B2 (fr)
BR (1) BR9809847A (fr)
CA (1) CA2290564A1 (fr)
DK (1) DK0983187T3 (fr)
ID (1) ID24342A (fr)
NO (1) NO311624B1 (fr)
WO (1) WO1998052819A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5992060A (en) * 1997-11-17 1999-11-30 Aker Marine, Inc. Method of and apparatus for anchor installation
EP1076625B1 (fr) 1998-05-06 2005-02-23 Suction Pile Technology B.V. Ancre marine et technique de mise en place
EP1878913B1 (fr) 2006-07-14 2013-03-13 OpenHydro Group Limited Turbine maremotrice bidirectionnelle
EP1980746B2 (fr) * 2007-04-11 2013-08-07 OpenHydro Group Limited Procédé d'installation d'une turbine hydroélectrique
ATE556218T1 (de) 2008-12-18 2012-05-15 Openhydro Ip Ltd Hydroelektrische turbine mit passiver bremse und verfahren zum betrieb
ATE481764T1 (de) 2008-12-19 2010-10-15 Openhydro Ip Ltd Verfahren zum installieren eines hydroelektrischen turbinengenerators
ATE548562T1 (de) 2009-04-17 2012-03-15 Openhydro Ip Ltd Verbessertes verfahren zur steuerung der ausgabe eines hydroelektrischen turbinengenerators
EP2302204A1 (fr) 2009-09-29 2011-03-30 OpenHydro IP Limited Système de turbine hydroélectrique
EP2302766B1 (fr) 2009-09-29 2013-03-13 OpenHydro IP Limited Turbine hydroélectrique avec refroidissement de bobine
EP2302755B1 (fr) 2009-09-29 2012-11-28 OpenHydro IP Limited Système et procédé de conversion d'alimentation électrique
EP2450562B1 (fr) 2010-11-09 2015-06-24 Openhydro IP Limited Système de récupération pour une turbine hydroélectrique et procédé de récupération
NO332121B1 (no) * 2010-11-09 2012-07-02 Aker Subsea As Havbunnsanker
EP2469257B1 (fr) 2010-12-23 2014-02-26 Openhydro IP Limited Procédé de test de turbine hydroélectrique
CN102673738B (zh) * 2012-05-22 2014-08-13 淮海工学院 自动垂直树根锚
KR101493330B1 (ko) * 2013-06-18 2015-02-13 한국해양과학기술원 다중석션매입 평판 앵커
KR101673152B1 (ko) * 2014-03-07 2016-11-08 한국해양과학기술원 석션매입 평판앵커의 시공장치
EP3492367A4 (fr) * 2016-07-27 2020-03-04 Beong Ho Cho Appareil d'amarrage
CN108001623B (zh) * 2017-12-02 2019-05-17 中国海洋大学 可自身旋转下贯的空心螺纹吸力锚
CN108316338B (zh) * 2018-04-04 2020-01-24 合肥学院 一种吸力贯入式弧形钢制锚
CN108725701A (zh) * 2018-06-29 2018-11-02 合肥学院 一种锚身可分离的鱼雷锚
CN110962992A (zh) * 2019-11-11 2020-04-07 安徽建筑大学 一种基于吸力桶贯入的旋转式锚泊装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8101640A (nl) * 1981-04-02 1982-11-01 Shell Int Research Zuiganker en werkwijze voor het installeren van een dergelijk anker.
GB2104137B (en) * 1981-08-22 1985-02-06 Alastair Aitken Sinclair Kentledge apparatus
GB2200672B (en) * 1986-09-10 1991-01-23 David Sidney Dallimer Apparatus for installing marine silos
NL9400101A (nl) * 1994-01-21 1995-09-01 Hogervorst Johannes R Werkwijze en inrichting voor het installeren van een holle zuigpaal in de bodem van een water.

Also Published As

Publication number Publication date
CA2290564A1 (fr) 1998-11-26
NO972330D0 (no) 1997-05-21
DK0983187T3 (da) 2002-05-27
NO972330L (no) 1998-11-23
EP0983187A1 (fr) 2000-03-08
WO1998052819A1 (fr) 1998-11-26
AU734658B2 (en) 2001-06-21
ID24342A (id) 2000-07-13
CN1203166A (zh) 1998-12-30
NO311624B1 (no) 2001-12-17
BR9809847A (pt) 2000-06-27
AU7457898A (en) 1998-12-11

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