EP1504292A1 - Procede de deploiement de materiel d'intervention sous-marine - Google Patents

Procede de deploiement de materiel d'intervention sous-marine

Info

Publication number
EP1504292A1
EP1504292A1 EP03720022A EP03720022A EP1504292A1 EP 1504292 A1 EP1504292 A1 EP 1504292A1 EP 03720022 A EP03720022 A EP 03720022A EP 03720022 A EP03720022 A EP 03720022A EP 1504292 A1 EP1504292 A1 EP 1504292A1
Authority
EP
European Patent Office
Prior art keywords
equipment
seafloor
conveying means
module
modules
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.)
Withdrawn
Application number
EP03720022A
Other languages
German (de)
English (en)
Inventor
F. c/oThales Underwater Systems Pty Ltd LUC
R. c/oThales Underwater Systems Pty Ltd DOWLE
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.)
Sercel Australia Pty Ltd
Original Assignee
Thales Underwater Systems Pty Ltd
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
Priority claimed from AUPS2255A external-priority patent/AUPS225502A0/en
Priority claimed from AU2003900266A external-priority patent/AU2003900266A0/en
Application filed by Thales Underwater Systems Pty Ltd filed Critical Thales Underwater Systems Pty Ltd
Publication of EP1504292A1 publication Critical patent/EP1504292A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/3843—Deployment of seismic devices, e.g. of streamers
    • G01V1/3852—Deployment of seismic devices, e.g. of streamers to the seabed

Definitions

  • the present invention relates generally to deploying seafloor equipment, for example seismic recorders for use in marine seismic surveying. While the invention will be described hereinafter with reference to this application, it will be appreciated that the invention is not limited to this particular field of use.
  • seafloor recorders are often used for earthquake monitoring or marine seismic operations. These devices are typically referred to as "Ocean Bottom Seismometers" and various descriptions can be found in U.S. Pat. No. 4,692,906 to Neeley (1987), U.S. Pat. No. 5,189,642 to Donoho et al. (1993) and U.S. Pat. No. 5,253,223 to Svenning et al. (1993).
  • Seafloor recorders typically consist of a pressure resistant waterproof container housing: a clock, digital data recording electronics, a battery, three geophones to sense the seafloor movement in all directions and a hydrophone to sense acoustic pressure. They can also be equipped with other means such as a chassis for coupling to the ground, a recovery module usually based on a weight release mechanism to ascend back to the surface, and secondary sensors such as a magnetic heading sensor, a tilt sensor and depth sensor.
  • U.S. Pat. No. 6,024,344 to Buckley et al. (2000) disclosed a method for recording seismic data in deep water where a plurality of seismic data recorders are attached to a wire stored on a seismic vessel. A free end of the wire is deployed into the water, and the recorders are attached at selected positions along the wire. The wire and recorders are lowered into the water as the vessel moves to control the recorder deployment. The wire controls recorder location and establishes the recorder spacing interval.
  • One significant drawback of this method is that for effective deployment in presence of currents, the density and mass per unit length of the cable and recorders has to be high compared to hydrodynamic drag, which results in a very significant overall weight to be carried by the vessel.
  • a method for deploying equipment modules to a seafloor of a body of water including the steps of: deploying conveying means having a free end reaching, or proximate to, the seafloor; dragging said conveying means through said water; slidably attaching one or more of said equipment modules to said conveying means; releasing said equipment modules such that said equipment modules slide along said conveying means to the seafloor, whereby said equipment modules engage said seafloor so as to secure the equipment modules at a fixed position.
  • a method for deploying and retrieving seafloor equipment including the steps of: providing a conveying means with a fixed end and a free end; releasing said conveying means into a body of water from a vessel until said free end reaches, or is proximate to, a seafloor of said body of water; dragging said conveying means behind said vessel at a controllable speed; slidably attaching said equipment including a recovery module and stopping means to said conveying means, wherein said equipment, said recovery module and said stopping means are secured one to another by a connector; sliding said equipment to the free end of the conveying means, said equipment being fixed in position on the seafloor by said stopping means once said stopping means reaches the seafloor; activating said recovery module so as to allow said equipment to ascend from the seafloor to a surface of the water; and retrieving said equipment from the surface of the water.
  • the conveying means is in the form of a cable.
  • a method for deploying equipment modules to a seafloor of a body of water including the steps of: deploying conveying means having a free end reaching, or proximate to, the seafloor, said conveying means further having an equipment module release mechanism disposed at, or adjacent to, said free end; dragging said conveying means through said water; slidably attaching an equipment module to said conveying means; allowing said equipment module to slide along said conveying means to the equipment module release mechanism; activating said equipment module release mechanism so as to selectively release said equipment module when said equipment module is at, or close to, a predefined seafloor deployment position; and allowing said equipment module to engage with said seafloor so as to secure the equipment module at a fixed position.
  • FIGs. la to lc depict the process flow of one embodiment according to the present invention in general overview
  • FIGs. 2a to 2c depict the process flow of a second embodiment according to the present invention in general overview.
  • FIGs. 3a to 3c depict the process flow of another embodiment according to the present invention in general overview.
  • the preferred embodiment of the present invention provides a method for deploying and retrieving equipment such as seismic data recorders from a surface vessel.
  • equipment takes the form of equipment modules which may include any one or more of the following: seismic sensors and recorders, auxiliary sensors such as heading sensors, positioning sensors, acoustic transponders, and/or other like equipment.
  • seismic sensors and recorders may include any one or more of the following: seismic sensors and recorders, auxiliary sensors such as heading sensors, positioning sensors, acoustic transponders, and/or other like equipment.
  • the present embodiment includes the steps of, firstly, providing conveying means such as a cable 100 which is typically very long, for example up to a few kilometres.
  • the cable 100 is preferably metallic to combine strength and high density and can feature an outer coating to facilitate sliding.
  • the cable 100 is released into the water 110 from the seismic vessel 120.
  • the cable 100 is dragged behind the seismic vessel 120 under a controllable speed such that a free end 101 of the cable 100 reaches, or is proximate to the seafloor 130.
  • the term "seafloor” refers to the bottom 130 of any body of water 110.
  • a plurality of equipment modules 140, 141 and 142 are slidably attached to the cable 100, for example by using clips 143 which preferably include a snap-link.
  • the equipment modules may include any one or more of: one or more seismic data recording units 140, each having sensors, clocks and associated electronics; a recovery module 141, for example including buoyancy means; and/or stopping means 142, such as an anchor, used to maintain the equipment modules at fixed positions once they reach the seafloor 130.
  • a connector 144 which provides a mechanical link 144, such as high tensile strength fibre, eg Kevlar or Vectran.
  • a mechanical link 144 such as high tensile strength fibre, eg Kevlar or Vectran.
  • the mechanical link 144 relates solely to recovery of the modules 140, 141 and 142. During decent and whilst on the seafloor, the mechanical link 144 is slack. This helps to avoid vibrational coupling between adjacent recorders which could result in false readings.
  • the equipment modules are deployed by allowing the clips 143 to slide along the cable 100, thereby dropping from the vessel 120 down to the seafloor 130. Once released, the equipment modules 140, 141 and 142 are forced downwardly by the combined action of the profile of the cable 100 and the hydrodynamic drag on the equipment modules caused by the dragging of the cable 100 through the water. Once the equipment modules 140, 141 and 142 reach the seafloor 130, the measurement and recording of seismic data may commence.
  • the fixed position 150 of the equipment modules 140, 141 and 142 on the seafloor 130, as shown in FIG. lc, is dependent upon a number of factors such as: the position of the vessel 120 at the time of release of the equipment modules 140, 141 and 142; the speed at which the equipment modules 140, 141 and 142 descend along the cable 100 (which, in turn, is dependent upon the speed at which the cable 100 is dragged through the water behind the vessel 120, the density of the equipment modules 140, 141 and 142, the profile of the cable 100, any currents that may exist at various depths within the body of water 120, etc); any friction that may exist between the cable 100 and the clip 143; and the depth of the water 110.
  • the preferred embodiment of the present invention makes use of known methods for controlling cable deployment to the bottom of the sea, for example methods used in the art of laying intercontinental communications cables.
  • known methods include the use of: Global Positioning Systems (GPS) to determine the position the vessel 120;
  • GPS Global Positioning Systems
  • ADCP Acoustic Doppler Current Profilers
  • the profile of the cable 100 can be calculated from a knowledge of hydrodynamic coefficients of the cable 100 and its mechanical properties combined with data from the GPS and ADCP. Acoustic transponders can also be used to check or refine calculations. This equipment is advantageously employed in conjunction with software programs which give navigational advice to the ship 120 in order to optimize the control of the deployment.
  • the variables which impact upon the ultimate positioning of the equipment 140, 141 and 142 upon the seafloor 130 are controlled sufficiently for placement of the equipment 140, 141 and 142 in a position 150 on the seafloor 110 to within an accuracy of approximately 1.5% of the depth of the water.
  • Some embodiments of the present invention can provide positioning to within an accuracy of approximately 0.5% of the depth of the water. Such accuracy compares favourably to the majority of the prior art methods for deploying equipment to a seafloor environment at depths of thousands of meters.
  • the separation distance between the fixed positions 150 of two adjacent groups of equipment modules 140, 141 and 142 on the seafloor 130 is also dependent upon the above mentioned factors.
  • the separation between adjacent equipment modules 141 can also be controlled by precise timing of their release from the vessel 130, in conjunction with monitoring of the other relevant factors.
  • the final step in the first preferred method is ascent of the equipment modules
  • Ascent of a given equipment module commences upon activation of the recovery module 141 which causes the recovery module 141 to ascend back to the surface of the water.
  • the mechanical link 144 ensures that the recording unit 140 and the anchor 142 accompany the recovery module 141 in the ascent to the surface.
  • the equipment modules 140, 141 and 142 can be collected by the same vessel 120 or by another vessel.
  • any data recorded and stored by the recording unit 140 can be downloaded and the battery reloaded if necessary.
  • an acoustic source 195 such as air-guns or marine vibrators, can be used for acoustic illumination.
  • the acoustic source may be disposed on a vessel, or deployed onto the cable 100 in accordance with the preferred embodiment.
  • FIG. 2a - FIG. 2c illustrated is a process flow of an alternate embodiment according to the present invention in general overview. These drawings merely show several key steps in sequential processes.
  • the present embodiment includes the steps of, firstly, providing conveying means such as a cable 200 with a fixed end and a free end 201.
  • conveying means such as a cable 200 with a fixed end and a free end 201.
  • the cable 200 is comparatively heavy to ensure that it adopts a reliable profile when hanging from the vessel 220.
  • the ratio of recorder units 240 to ancillary equipment (such as recovery modules 241 and anchors 242) in the preferred embodiment illustrated in figures 2a to 2c is higher than that shown in figures la to lc. This generally allows for more economic deployment of a large number of recorder units 241 as it is not necessary to provide a recovery module 241 and an anchor 242 for each recorder unit 204.
  • the slidable attachment may be provided by clips 243 which are designed to slide along the cable 200, and can, for instance, consist in a snap-link and a rope.
  • the equipment 240 including the recovery module 241 and the stopping means 242, are tethered together by a connector 244, such as a rope.
  • the rope 244 is made from a light material, such as a high tensile strength low-density fibre, for example Kevlar or Vectran.
  • Use of a connector 244 allows deployment and retrieval of a plurality of equipment modules, for example many seismic recording units 240, at the same time.
  • the recording units 240 are preferably initialized and their clocks synchronized.
  • the recovery module 241 may take the form of a pop-up buoy, or a combination of a buoy, a weight and a weight release mechanism. Some embodiments of the recovery module are automatically activatable, for example by a timer. Alternatively, the recovery module may be remotely activatable, for example upon detection of a signal, such as an acoustic signal.
  • the equipment 240 including the recovery module 241 and the stopping means 242, by allowing the equipment 240 to slide along the cable 200 and thereby drop from the vessel 220 down to the bottom 230 of the water 210.
  • the equipment 240 is forced to the bottom 230 by the combined action of the shape of the heavy cable 200, the drag of the water and the weight of the equipment.
  • the equipment 240 is maintained in contact with the seafloor 230 at a fixed position 250 by the stopping means 242 and due to the weight of the equipment. Whilst deployed on the seafloor, the rope 244 between equipment modules remains slack. This assists to avoid undesirable vibrational coupling between adjacent recording units 241.
  • Precise timing of the dropping of the equipment is provided by a mechanical latch system.
  • the positioning of the equipment on the seafloor, and the separation distance between adjacent equipment, is dependent upon the same factors as outlined above in relation to the first embodiment.
  • the recovery module 241 When the time comes for the equipment to ascend, the recovery module 241 is activated. In one embodiment activation of the recovery module 241 occurs once a timer indicates that a predetermined length of time has elapsed. In another embodiment the recovery module 241 is adapted to activate upon detection of a signal. Upon activation, one embodiment of the recovery module 241 activates a weight release mechanism. In another embodiment, activation of the recovery module causes inflation of a membrane. In any event, upon activation the recovery module 241 assumes a positive buoyancy sufficient for the ascension of the equipment 240 from the seafloor 230 to the surface of the water. Finally, the equipment is retrieved from the surface of the water.
  • the same vessel 220 can be used to illuminate the area with an acoustic source and then to collect the data recorders 240 once the recovery modules 241 have been triggered.
  • another vessel can be used for acoustic illumination and/or recovery.
  • the preferred embodiments provide very good control of the positioning of comparatively light equipment due to the use of a heavy cable 200.
  • positioning means such as acoustic transponders and auxiliary sensors, can be deployed by being tethered to the equipment modules 240, 241 and/or 242.
  • positioning means are slidably attached to the cable and then deployed and retrieved using the same method as for the equipment modules.
  • FIG. 3a - FIG. 3c illustrated is a process flow of a third embodiment according to the present invention in general overview. These drawings merely show several key steps in sequential processes.
  • the third embodiment includes the steps of, first, providing conveying means such as a cable 300 with a fixed end and a free end equipped with a towed vehicle 301 which includes an equipment release mechanism, for example an electromagnetically actuatable latch.
  • conveying means such as a cable 300 with a fixed end and a free end equipped with a towed vehicle 301 which includes an equipment release mechanism, for example an electromagnetically actuatable latch.
  • the cable 300 is released into water 310 from a seismic vessel 320 until the towed vehicle 301 approaches the bottom 330 of the water 310.
  • the cable 300 is dragged behind the seismic vessel 320 under a controllable speed.
  • the length of the cable 300 is controlled to what is needed for the towed vehicle to approach the bottom 330 within a few meters.
  • the location of the towed vehicle 301 may be precisely measured by using an ultra short acoustic base located on the vessel 320 and an acoustic transponder fixed onto the towed body 301.
  • equipment modules such as a plurality of seismic recording units 340 and a recovery module 341, are attached to the cable 300 by using a clipping system 34 which is designed to slide along the cable 300 and can, for instance, consist in a snap-link and a rope.
  • the recording units need to be initialized and clocks need to be synchronized.
  • the equipment modules are secured one to another by connecting means 344, such as a rope, which allows retrieval of many seismic recording units 340 with a single recovery module 341.
  • the rope 344 may be comparatively light weight through the use of high tensile strength low-density fibre such as Kevlar or Vectran, for instance.
  • the recovery module 341 can consist in a pop up buoy or can be made of a buoy, a weight and a weight release mechanism, which can be activated by a timer or remotely.
  • the equipment modules 340 and 341 are deployed by allowing the clippings 343 to slide along the cable 300 and so as to descend from the seismic vessel 320 down to the towed vehicle 301.
  • the equipment modules 340 and 341 are forced towards the bottom 330 by the combined action of the shape of the heavy cable 300, their hydrodynamic drag in the water and their negative buoyancy.
  • the equipment modules 340 Once the equipment modules 340 have reached the towed vehicle 301, they are restrained at, or adjacent to, the free end of the cable 300 by the electromagnetically actuatable latch until the equipment modules 340, 341 are in, or close to, an intended seafloor deployment position.
  • one or more equipment modules 340 and/or 341 are released by the electromagnetically actuatable latch and allowed to sink to the bottom 330 at fixed deployment positions 350.
  • Precise timing and location of the dropping of each equipment module 340 and/or 341 can be controlled from the vessel 320 by communication of a signal from the vessel 320 to the towed vehicle 301, either electrically through a conductor in cable 300 or acoustically through the water 310.
  • the electromagnetically actuatable latch releases one or more of the equipment modules 340 and/or 341.
  • the recovery module 341 is activated by either a timer, remotely or by any other means for allowing the equipment modules 340 and 341 to ascend from the bottom 330 to the surface of the water.
  • the rope 344 ensures that the recorder units 340 ascend with the recovery module 341.
  • the equipment modules 340 and 341 are retrieved from the surface of the water.
  • the present embodiment allows fulfilment of complex deployment geometry. Immediately after deployment, the same vessel can be used to illuminate the area with an acoustic source and then collect the data recorders 340 once the recovery modules 341 have been triggered. Alternatively, another vessel can be used for acoustic illumination and/or recovery.
  • the preferred embodiments advantageously allow for very good control of the positioning of equipment modules using a considerably lighter system for a given positioning performance.

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oceanography (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electric Cable Installation (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

La présente invention concerne un procédé de déploiement et de récupération de matériel d'intervention sous-marine, consistant à mettre en oeuvre un moyen de transport (200) présentant une extrémité fixe et une extrémité libre (201) ; à libérer ledit moyen de transport (200) dans une étendue d'eau (210) à partir d'un navire (220) jusqu'à ce que ladite extrémité libre atteigne ou soit proche d'un fond marin (230) de ladite étendue d'eau (210) ; à draguer ledit moyen de transport (200) derrière ledit navire (220) à vitesse contrôlée ; à attacher de façon coulissante au moyen de transport, ledit matériel (240) comportant une module de récupération (241) et un moyen d'arrêt (242), ledit matériel c.-à-d. le module de récupération et le moyen d'arrêt étant fixés les uns aux autres par l'intermédiaire d'un connecteur (244) ; à faire coulisser ledit matériel (240) jusqu'à l'extrémité libre (201) du moyen de transport (200), ledit matériel (240) étant fixé en position au fond marin (230) par l'intermédiaire du moyen d'arrêt (242) jusqu'à celui-ci atteigne le fond marin ; à activer ledit module de récupération (241) de manière que ledit matériel (240) remonte du fond marin (230) à la surface de l'eau ; et, à récupérer ledit matériel (240) à la surface de l'eau. Le moyen de transport (200) se présente de préférence sous la forme d'un câble.
EP03720022A 2002-05-10 2003-05-09 Procede de deploiement de materiel d'intervention sous-marine Withdrawn EP1504292A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AU2002002255 2002-05-10
AUPS2255A AUPS225502A0 (en) 2002-05-10 2002-05-10 Method for deploying seafloor equipment
AU2003900266A AU2003900266A0 (en) 2003-01-20 2003-01-20 Method for deploying seafloor equipment
AU2003900266 2003-01-20
PCT/AU2003/000561 WO2003096072A1 (fr) 2002-05-10 2003-05-09 Procede de deploiement de materiel d'intervention sous-marine

Publications (1)

Publication Number Publication Date
EP1504292A1 true EP1504292A1 (fr) 2005-02-09

Family

ID=29421062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03720022A Withdrawn EP1504292A1 (fr) 2002-05-10 2003-05-09 Procede de deploiement de materiel d'intervention sous-marine

Country Status (5)

Country Link
EP (1) EP1504292A1 (fr)
CN (1) CN1659449A (fr)
CA (1) CA2485470A1 (fr)
NO (1) NO335236B1 (fr)
WO (1) WO2003096072A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003900280A0 (en) * 2003-01-20 2003-02-06 Thales Underwater Systems Pty Limited Improved sensors and an improved data sensing and recording apparatus
US7310287B2 (en) * 2003-05-30 2007-12-18 Fairfield Industries Incorporated Method and apparatus for seismic data acquisition
GB0600445D0 (en) 2006-01-11 2006-02-15 Ocean Cable Technologies Ltd Cable Gripper
CN101282028B (zh) * 2008-05-29 2010-06-09 国网武汉高压研究院 水底电缆敷设方法及装置
CN102374338A (zh) * 2010-08-20 2012-03-14 中国海洋石油总公司 深水s型海底管道的铺设工艺
NO336039B1 (no) * 2013-09-06 2015-04-27 Magseis As Apparat for utplassering og opphenting av seismiske noder
NO337396B1 (no) * 2014-03-07 2016-04-04 Seafloor Geophysical Solutions As System og fremgangsmåte for å koble seismiske havbunnsnoder til en tauet kabel
CN104267428B (zh) * 2014-10-22 2017-02-08 中国海洋石油总公司 一种深海作业缆绳系统
CN104875867B (zh) * 2015-04-28 2017-02-22 中国船舶重工集团公司第七○二研究所 一种载人潜水器深海敷缆作业系统
MX2019013812A (es) 2017-05-23 2020-01-23 Ion Geophysical Corp Sistema de despliegue de nodos sismicos.
CN107460750A (zh) * 2017-09-28 2017-12-12 浙江四兄绳业有限公司 一种物探缆绳
EP3802309B1 (fr) 2018-06-08 2024-04-10 DigiCourse LLC Mécanisme de fixation de noeud de capteur et système de récupération de câble
FR3120844A1 (fr) 2021-03-19 2022-09-23 Sercel Système de récupération de sismomètre de fond de mer, navire et procédé correspondant
CN113131404B (zh) * 2021-04-20 2021-09-28 伟卓石油科技(北京)有限公司 海底地下岩石中的线缆铺设方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2029494T3 (es) * 1987-06-29 1992-08-16 European Economic Community E.E.C. Dispositivo para el frenado de una capsula de fin de carrera.
US6024344A (en) * 1999-02-17 2000-02-15 Western Atlas International, Inc. Method for recording seismic data in deep water

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03096072A1 *

Also Published As

Publication number Publication date
CN1659449A (zh) 2005-08-24
WO2003096072A1 (fr) 2003-11-20
NO20045410L (no) 2005-02-10
NO335236B1 (no) 2014-10-27
CA2485470A1 (fr) 2003-11-20

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