EP0242307B1 - Device for the under water drilling of foundations - Google Patents

Device for the under water drilling of foundations Download PDF

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Publication number
EP0242307B1
EP0242307B1 EP87400902A EP87400902A EP0242307B1 EP 0242307 B1 EP0242307 B1 EP 0242307B1 EP 87400902 A EP87400902 A EP 87400902A EP 87400902 A EP87400902 A EP 87400902A EP 0242307 B1 EP0242307 B1 EP 0242307B1
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EP
European Patent Office
Prior art keywords
turbine
hydraulic
distribution box
fact
pump
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
Application number
EP87400902A
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German (de)
French (fr)
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EP0242307A1 (en
Inventor
Hervé Barthelemy
Karl Bollinger
Michel Brochier
Maurice Gau
Yves Legendre
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Soletanche SA
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Soletanche SA
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Publication of EP0242307A1 publication Critical patent/EP0242307A1/en
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    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—Underwater drilling

Definitions

  • the present invention relates to a device for the submerged drilling of foundations, and more particularly to such a device of the type comprising at least one cutter and a pump for discharging cuttings, and hydraulic motors for driving said cutter and said pump.
  • Such anchoring points capable for example of taking up vertical or horizontal forces of the order of 1000 or 2000 tonnes, require the realization in the ground, under several hundred meters of water, of piles of several square meters of section and several tens of meters in height, and therefore require corresponding holes to be drilled.
  • This device is however limited, at a very great depth, by the weight and the cost of the tubular assembly, and by the power required to ensure the circulation of the hydraulic fluid.
  • the present invention aims to provide a drilling device better suited to very great depths.
  • the subject of the invention is a device for the submerged drilling of foundations, comprising at least one cutter and a cuttings delivery pump, and hydraulic motors for driving said cutter and said pump, characterized in that it comprises a hydraulic turbine capable of operating with the aid of a fluid such as sea water, and a hydraulic power unit driven by said turbine and arranged to supply said hydraulic motors.
  • the device according to the invention consequently comprises its own power installation constituted by the hydraulic power station.
  • Primary energy is very simply supplied from the service vessel in the form, for example, of pressurized seawater, which can be obtained in particular by means of drilling mud pumps with which all vessels are fitted. drilling.
  • the device according to the invention does not require any electrical transfer of power between the surface and the bottom and consequently avoids the use of a high capacity cable which poses problems difficult to solve due to the depth. of proposed operation.
  • the device according to the invention comprises two cutters with horizontal axes rotating in opposite directions.
  • the turbine exhaust is directed to the tools of the cutter to ensure cleaning.
  • the hydraulic power unit can comprise a plurality of hydraulic pumps, for example one per motor, driven by said turbine via a mechanical distribution box.
  • the device according to the invention may comprise a head forming a first distribution box for the supply of said turbine and the delivery of the cuttings.
  • This head can be connected to the body of the device by at least one advance cylinder supplied by said hydraulic unit.
  • the head can also be connected by a two-way pipe to a second connected distribution box, on the one hand to means for supplying the supply fluid to the turbine, and on the other hand to a discharge hose. spoils.
  • FIG. 1 generally shows the drilling rig 1, connected by a drill string 2, of the drill string type, to a service vessel 3 which may for example be a dynamically positioned vessel.
  • the drill string 2 is suspended from the ship by its upper part using an operating winch 4.
  • the ship 3 also carries a pump 5 of the slurry pump type, connected by means of a hose
  • a winch 8 allows the unwinding of an electric cable 9 of low power, making it possible to supply the electrical members, such as the measuring instruments, of the apparatus 1, and another winch 10 allows the unwinding of another cable.
  • the rod train 2 ends at its lower part by a distribution box 13 connected by a two-way pipe 14 to another distribution box 15.
  • the two-way pipe 14 is constituted for example by two concentric tubes.
  • the path of the pipe 14 coming, via the distribution box 13, from the drill string 2, is directed towards a hydraulic turbine 16, via the distribution box 15 and a flexible conduit 17 .
  • the other channel of the pipe 14 is connected at its upper part, via the distribution box 13, to a hose 18 for removing the cuttings and at its lower part, via the distribution box. 15, to a telescopic conduit 19 for discharging the cuttings.
  • the pipe 14 has a length such that the distribution box 13 is located above the guide and blocking means 12 when the device 1 is at the bottom of the borehole.
  • the turbine 16 is provided with a valve 20 controlled by the inlet pressure of the turbine, that is to say the pressure in the duct 17, for regulating the speed of the turbine according to the power demanded.
  • the exhaust 21 of the turbine is directed by a conduit, not shown, to the cutters which will be described below in order to clean the drilling peaks.
  • the rotor of the turbine 16 is connected, by means of a coupling 22, to a mechanical distribution box 23 also serving as a reduction gear, and provided with several outlets capable of driving a set of hydraulic pumps 24.
  • the primary shaft of the distribution box 23 also carries a speed control device 25.
  • the distribution box 23, the pumps 24 and the speed control device 25 are placed in an oil pan 26.
  • the drilling device 1 also comprises two cutters 27 with a horizontal axis and rotating in opposite directions, so as to bring the cuttings back to a suction nozzle 28 connected to a pump 29 for discharging the cuttings.
  • the output of the pump 29 is connected to the discharge conduit 19.
  • the cutters 27 and the pump 29 are each driven by one of the hydraulic motors supplied by hydraulic pumps 24.
  • the distribution box 15 is connected to the body of the device 1 by a hydraulic advance cylinder 30, also supplied by one of the pumps 24.
  • the guide and blocking assembly 12 is composed of a lower structure 31 and an upper structure 32, blocking jaws 33 for the pipe 14 being mounted on the upper structure 32, from which they can be actuated at by means of electric jacks 34 supplied by the cable 11.
  • the lower structure 31 forms two sets of guide surfaces 35 and 36 respectively.
  • the guide surfaces 35 form a re-entry cone making it possible to guide the drilling device 1 in a borehole already partially carried out when, for whatever reason, it has had to be withdrawn therefrom.
  • the guide surfaces 36 cooperate with other guide surfaces 37 provided on the upper structure 32 to ensure, during such reentry, correct repositioning between the lower structures 31 and upper 32.
  • the drilling is carried out by an alternative operation of the jack 30 and the jaws 33, as described in French patent application 8 514 939.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Description

La présente invention concerne un dispositif pour le forage immergé de fondations, et plus particulièrement un tel dispositif du type comprenant au moins une fraise et une pompe de refoulement des déblais, et des moteurs hydrauliques pour entraîner ladite fraise et ladite pompe.The present invention relates to a device for the submerged drilling of foundations, and more particularly to such a device of the type comprising at least one cutter and a pump for discharging cuttings, and hydraulic motors for driving said cutter and said pump.

L'exploitation de gisements d'hydrocarbures à grande profondeur fait de plus en plus appel à des plate-formes de production qui nécessitent l'utilisation de points d'ancrage de très forte capacité. C'est le cas par exemple des plateformes dites «à câbles tendus».The exploitation of hydrocarbon deposits at great depths calls more and more on production platforms which require the use of anchor points of very high capacity. This is the case, for example, of so-called “stretched cable” platforms.

De tels points d'ancrage, capables par exemple de reprendre des efforts verticaux ou horizontaux de l'ordre de 1000 ou 2000 tonnes, nécessitent la réalisation dans le sol, sous plusieurs centaines de mètres d'eau, de piles de plusieurs mètres carrés de section et de plusieurs dizaines de mètres de hauteur, et nécessitent par conséquent la réalisation de forages correspondants.Such anchoring points, capable for example of taking up vertical or horizontal forces of the order of 1000 or 2000 tonnes, require the realization in the ground, under several hundred meters of water, of piles of several square meters of section and several tens of meters in height, and therefore require corresponding holes to be drilled.

Le forage rotatif étant exclu pour réaliser de tels points d'ancrage, d'autres solutions ont déjà été proposées.Rotary drilling being excluded to make such anchor points, other solutions have already been proposed.

C'est ainsi que la demande de brevet français n° 8 514 939 (FR-A-2 588 297) décrit un dispositif comprenant:Thus, French patent application No. 8,514,939 (FR-A-2,588,297) describes a device comprising:

  • - un appareil de forage possédant une tête reliée par un vérin hydraulique d'avance à un corps muni de fraises, cet appareil étant en outre muni d'une pompe de refoulement des déblais et de moteurs hydrauliques pour entraîner les fraises et la pompe;- a drilling apparatus having a head connected by a hydraulic advance cylinder to a body provided with cutters, this apparatus being furthermore provided with a pump for discharging cuttings and with hydraulic motors for driving the cutters and the pump;
  • - un ensemble tubulaire rigide comportant une canalisation pour le refoulement des déblais et des canalisations d'alimentation du vérin et des moteurs en fluide hydraulique;- a rigid tubular assembly comprising a pipe for the delivery of cuttings and pipes for supplying the actuator and the motors with hydraulic fluid;
  • - des moyens de liaison entre la tête de l'appareil de forage et l'extrémité inférieure de l'ensemble tubulaire;- connecting means between the head of the drilling rig and the lower end of the tubular assembly;
  • - des moyens de support disposés sur le fond marin en tête du forage, agencés pour supporter des moyens de blocage de l'ensemble tubulaire; et- support means arranged on the seabed at the head of the borehole, arranged to support means for blocking the tubular assembly; and
  • - des moyens de suspension du dispositif à un navire; des moyens étant prévus pour la fourniture de fluide hydraulique, et des conduits de liaison étant prévus entre ces moyens de fourniture de fluide et l'extrémité de l'ensemble tubulaire.- means for suspending the device from a ship; means being provided for the supply of hydraulic fluid, and connecting conduits being provided between these means for supplying fluid and the end of the tubular assembly.

Ce dispositif est toutefois limité, à très grande profondeur, par le poids et le coût de l'ensemble tubulaire, et par la puissance requise pour assurer la circulation du fluide hydraulique.This device is however limited, at a very great depth, by the weight and the cost of the tubular assembly, and by the power required to ensure the circulation of the hydraulic fluid.

La présente invention vise à fournir un dispositif de forage mieux adapté aux très grandes profondeurs.The present invention aims to provide a drilling device better suited to very great depths.

A cet effet, l'invention a pour objet un dispositif pour le forage immergé de fondations, comprenant au moins une fraise et une pompe de refoulement des déblais, et des moteurs hydrauliques pour entraîner ladite fraise et ladite pompe, caractérisé par le fait qu'il comprend une turbine hydraulique susceptible de fonctionner à l'aide d'un fluide tel que l'eau de mer, et une centrale hydraulique entraînée par ladite turbine et agencée pour alimenter lesdits moteurs hydrauliques.To this end, the subject of the invention is a device for the submerged drilling of foundations, comprising at least one cutter and a cuttings delivery pump, and hydraulic motors for driving said cutter and said pump, characterized in that it comprises a hydraulic turbine capable of operating with the aid of a fluid such as sea water, and a hydraulic power unit driven by said turbine and arranged to supply said hydraulic motors.

Contrairement à ce qui était le cas auparavant, le dispositif selon l'invention comprend par conséquent sa propre installation de puissance constituée par la centrale hydraulique. L'énergie primaire est fournie très simplement à partir du navire de service sous la forme, par exemple, d'eau de mer sous pression, qui peut être obtenue notamment à l'aide des pompes à boue de forage dont sont équipés tous les navires de forage.Contrary to what was the case previously, the device according to the invention consequently comprises its own power installation constituted by the hydraulic power station. Primary energy is very simply supplied from the service vessel in the form, for example, of pressurized seawater, which can be obtained in particular by means of drilling mud pumps with which all vessels are fitted. drilling.

Par ailleurs, la puissance nécessaire est considérablement diminuée puisqu'il n'y a plus de circulation de fluide hydraulique entre le dispositif et la surface, mais uniquement l'injection à l'entrée de la turbine de fluide tel que l'eau de mer sous pression, qui est ensuite évacué au fond du forage.Furthermore, the power required is considerably reduced since there is no longer any circulation of hydraulic fluid between the device and the surface, but only the injection at the inlet of the turbine of fluid such as sea water. under pressure, which is then evacuated to the bottom of the borehole.

On remarquera de plus que le dispositif selon l'invention ne nécessite aucun transfert électrique de puissance entre la surface et le fond et évite par conséquent l'utilisation d'un câble de forte capacité qui pose des problèmes difficiles à résoudre en raison de la profondeur d'exploitation envisagée.It will also be noted that the device according to the invention does not require any electrical transfer of power between the surface and the bottom and consequently avoids the use of a high capacity cable which poses problems difficult to solve due to the depth. of proposed operation.

Dans un mode de réalisation préféré, le dispositif selon l'invention comprend deux fraises d'axes horizontaux tournant en sens inverse.In a preferred embodiment, the device according to the invention comprises two cutters with horizontal axes rotating in opposite directions.

Afin de réaliser le plus simplement possible la régulation de vitesse de la turbine, on peut prévoir un clapet de décharge s'ouvrant sous l'effet d'une augmentation de pression à l'entrée de la turbine causée par une survitesse.In order to make the speed regulation of the turbine as simple as possible, it is possible to provide a relief valve opening under the effect of an increase in pressure at the inlet of the turbine caused by an overspeed.

De préférence, l'échappement de la turbine est dirigée sur les outils de la fraise afin d'en assurer le nettoyage.Preferably, the turbine exhaust is directed to the tools of the cutter to ensure cleaning.

La centrale hydraulique peut comprendre une pluralité de pompes hydrauliques, par exemple une par moteur, entraînées par ladite turbine par l'intermédiaire d'une boîte de répartition mécanique.The hydraulic power unit can comprise a plurality of hydraulic pumps, for example one per motor, driven by said turbine via a mechanical distribution box.

Dans un mode de réalisation particulier, le dispositif selon l'invention peut comprendre une tête formant une première boîte de distribution pour l'alimentation de ladite turbine et le refoulement des déblais.In a particular embodiment, the device according to the invention may comprise a head forming a first distribution box for the supply of said turbine and the delivery of the cuttings.

Cette tête peut être reliée au corps du dispositif par au moins un vérin d'avance alimenté par ladite centrale hydraulique.This head can be connected to the body of the device by at least one advance cylinder supplied by said hydraulic unit.

La tête peut par ailleurs être reliée par une conduite à deux voies à une deuxième boîte de distribution connectée, d'une part à des moyens pour fournir le fluide d'alimentation de la turbine, et d'autre part à un flexible d'évacuation des déblais.The head can also be connected by a two-way pipe to a second connected distribution box, on the one hand to means for supplying the supply fluid to the turbine, and on the other hand to a discharge hose. spoils.

On décrira maintenant à titre d'exemple non limitatif un mode de réalisation particulier de l'invention en référence aux dessins schématiques annexés dans lesquels:

  • - la figure 1 est une vue d'ensemble du dispositif selon l'invention ainsi que d'un navire à partir duquel il est mis en oeuvre, et
  • - la figure 2 est une vue en élévation de l'ensemble turbine/centrale hydraulique du dispositif.
A particular embodiment of the invention will now be described by way of nonlimiting example with reference to the appended schematic drawings in which:
  • FIG. 1 is an overall view of the device according to the invention as well as of a ship from which it is used, and
  • - Figure 2 is an elevational view of the turbine / hydraulic unit of the device.

La figure 1 représente d'une façon générale l'appareil de forage 1, relié par un train de tiges 2, du type tiges de forage, à un navire de service 3 qui peut être par exemple un navire à positionnement dynamique.FIG. 1 generally shows the drilling rig 1, connected by a drill string 2, of the drill string type, to a service vessel 3 which may for example be a dynamically positioned vessel.

Le train de tiges 2 est suspendu au navire par sa partie supérieure à l'aide d'un treuil de manoeuvre 4. Le navire 3 porte par ailleurs une pompe 5 du type pompe à boue, reliée par l'intermédiaire d'un flexibleThe drill string 2 is suspended from the ship by its upper part using an operating winch 4. The ship 3 also carries a pump 5 of the slurry pump type, connected by means of a hose

6 à une tête d'injection 7 du fluide sous pression, par exemple de l'eau de mer, dans le train de tiges 2.6 to an injection head 7 for the pressurized fluid, for example sea water, in the drill string 2.

Un treuil 8 permet le déroulement d'un câble électrique 9 de faible puissance, permettant d'alimenter les organes électriques, tels que les instruments de mesure, de l'appareil 1, et un autre treuil 10 permet le déroulement d'un autre câble électrique 11, également de faible puissance, permettant l'alimentation des vérins électriques du dispositif de guidage et de blocage 12 qui sera décrit ci-après.A winch 8 allows the unwinding of an electric cable 9 of low power, making it possible to supply the electrical members, such as the measuring instruments, of the apparatus 1, and another winch 10 allows the unwinding of another cable. electric 11, also of low power, allowing the supply of electric jacks to the guiding and blocking device 12 which will be described below.

Le train de tige 2 se termine à sa partie inférieure par une boîte de distribution 13 reliée par une conduite à deux voies 14 à une autre boîte de distribution 15.The rod train 2 ends at its lower part by a distribution box 13 connected by a two-way pipe 14 to another distribution box 15.

La conduite à deux voies 14 est constituée par exemple par deux tubes concentriques.The two-way pipe 14 is constituted for example by two concentric tubes.

La voie de la conduite 14 provenant, par l'intermédiaire de la boîte de distribution 13, du train de tiges 2, est dirigée vers une turbine hydraulique 16, par l'intermédiaire de la boîte de distribution 15 et d'un conduit flexible 17.The path of the pipe 14 coming, via the distribution box 13, from the drill string 2, is directed towards a hydraulic turbine 16, via the distribution box 15 and a flexible conduit 17 .

L'autre voie de la conduite 14 est reliée à sa partie supérieure, par l'intermédiaire de la boîte de distribution 13, à un flexible 18 d'évacuation des déblais et à sa partie inférieure, par l'intermédiaire de la boîte de distribution 15, à un conduit télescopique 19 de refoulement des déblais.The other channel of the pipe 14 is connected at its upper part, via the distribution box 13, to a hose 18 for removing the cuttings and at its lower part, via the distribution box. 15, to a telescopic conduit 19 for discharging the cuttings.

La conduite 14 possède une longueur telle que la boîte de distribution 13 se trouve au-dessus des moyens de guidage et de blocage 12 lorsque le dispositif 1 est au fond du forage.The pipe 14 has a length such that the distribution box 13 is located above the guide and blocking means 12 when the device 1 is at the bottom of the borehole.

La turbine 16 est munie d'un clapet 20 commandé par la pression d'admission de la turbine, c'est-à-dire la pression dans le conduit 17, pour réguler la vitesse de la turbine suivant la puissance demandée.The turbine 16 is provided with a valve 20 controlled by the inlet pressure of the turbine, that is to say the pressure in the duct 17, for regulating the speed of the turbine according to the power demanded.

L'échappement 21 de la turbine est dirigé par un conduit, non représenté, vers les fraises qui seront décrites ci-après afin d'en nettoyer les pics de forage.The exhaust 21 of the turbine is directed by a conduit, not shown, to the cutters which will be described below in order to clean the drilling peaks.

Le rotor de la turbine 16 est relié, par l'intermédiaire d'un accouplement 22, à une boîte de répartition mécanique 23 faisant également office de réducteur, et munie de plusieurs sorties susceptibles d'entraîner un ensemble de pompes hydrauliques 24.The rotor of the turbine 16 is connected, by means of a coupling 22, to a mechanical distribution box 23 also serving as a reduction gear, and provided with several outlets capable of driving a set of hydraulic pumps 24.

L'arbre primaire de la boîte de répartition 23 porte par ailleurs un dispositif 25 de contrôle de vitesse.The primary shaft of the distribution box 23 also carries a speed control device 25.

La boîte de répartition 23, les pompes 24 et le dispositif de contrôle de vitesse 25 sont placés dans un carter d'huile 26.The distribution box 23, the pumps 24 and the speed control device 25 are placed in an oil pan 26.

Le dispositif de forage 1 comprend par ailleurs deux fraises 27 à axe horizontal et tournant en sens inverse, de manière à ramener les déblais vers une buse d'aspiration 28 connectée à une pompe 29 de refoulement des déblais. La sortie de la pompe 29 est connectée au conduit de refoulement 19.The drilling device 1 also comprises two cutters 27 with a horizontal axis and rotating in opposite directions, so as to bring the cuttings back to a suction nozzle 28 connected to a pump 29 for discharging the cuttings. The output of the pump 29 is connected to the discharge conduit 19.

Les fraises 27 et la pompe 29 sont chacune entraînée par un des moteurs hydrauliques alimentés par des pompes hydrauliques 24.The cutters 27 and the pump 29 are each driven by one of the hydraulic motors supplied by hydraulic pumps 24.

Par ailleurs, la boîte de distribution 15 est reliée au corps du dispositif 1 par un vérin hydraulique d'avance 30, également alimenté par une des pompes 24.Furthermore, the distribution box 15 is connected to the body of the device 1 by a hydraulic advance cylinder 30, also supplied by one of the pumps 24.

On peut donc résumer de la façon suivante l'alimentation en énergie du dispositif selon l'invention:

  • - L'énergie primaire constituée dans le cas présent par de l'eau de mer sous pression est obtenue à partir de la pompe 5. Cette eau de mer sous pression est transmise au dispositif 1 par l'intermédiaire du flexible 5, de la tête d'injection 7, du train de tiges 2, de la boîte de distribution 13, et d'une des voies de la conduite 14.
  • - Cette eau de mer sous pression alimente ensuite la turbine 16 par l'intermédiaire de la boîte de distribution 15 et de la conduite 17, puis est évacuée, de préférence sur les pics des fraises 27.
  • - L'énergie mécanique engendrée par la turbine 16 est transmise par l'intermédiaire de l'accouplement 22 à la centrale hydraulique constitué par la boîte de répartition 23 et les pompes 24.
  • - Ces pompes 24 alimentent à leur tour en énergie les moteurs hydrauliques des fraises 27 et de la pompe 29.
The energy supply of the device according to the invention can therefore be summarized as follows:
  • - The primary energy constituted in this case by pressurized sea water is obtained from the pump 5. This pressurized sea water is transmitted to the device 1 via the hose 5, from the head injection 7, of the drill string 2, of the distribution box 13, and of one of the lines of the pipe 14.
  • This pressurized seawater then feeds the turbine 16 via the distribution box 15 and the pipe 17, then is discharged, preferably on the peaks of the strawberries 27.
  • - The mechanical energy generated by the turbine 16 is transmitted via the coupling 22 to the hydraulic unit constituted by the distribution box 23 and the pumps 24.
  • - These pumps 24 in turn supply energy to the hydraulic motors of the cutters 27 and of the pump 29.

L'ensemble de guidage et de blocage 12 est composé d'une structure inférieure 31 et d'une structure supérieure 32, des mors de blocage 33 pour la conduite 14 étant montés sur la structure supérieure 32, à partir de laquelle ils sont actionnables au moyen de vérins électriques 34 alimentés par le câble 11.The guide and blocking assembly 12 is composed of a lower structure 31 and an upper structure 32, blocking jaws 33 for the pipe 14 being mounted on the upper structure 32, from which they can be actuated at by means of electric jacks 34 supplied by the cable 11.

La structure inférieure 31 forme deux ensembles de surfaces de guidage 35 et 36 respectivement. Les surfaces de guidage 35 forment un cône de rentrée permettant de guider le dispositif de forage 1 dans un forage déjà partiellement réalisé lorsque, pour une raison quelconque, il a dû en être retiré. Les surfaces de guidage 36 coopèrent avec d'autres surfaces de guidage 37 prévues sur la structure supérieure 32 pour assurer, lors d'une telle rentrée, un reposition- nement correct entre les structures inférieure 31 et supérieure 32.The lower structure 31 forms two sets of guide surfaces 35 and 36 respectively. The guide surfaces 35 form a re-entry cone making it possible to guide the drilling device 1 in a borehole already partially carried out when, for whatever reason, it has had to be withdrawn therefrom. The guide surfaces 36 cooperate with other guide surfaces 37 provided on the upper structure 32 to ensure, during such reentry, correct repositioning between the lower structures 31 and upper 32.

Le forage s'effectue par un fonctionnement alternatif du vérin 30 et des mors 33, comme cela est décrit dans la demande de brevet français 8 514 939.The drilling is carried out by an alternative operation of the jack 30 and the jaws 33, as described in French patent application 8 514 939.

Claims (6)

1. A device for the immersed drilling of foundations, including at least one cutter (27) and a discharge pump (29) for the spoil, and hydraulic motors for driving said cutter and said pump, which device includes moreover a hydraulic turbine (16) adapted for operating with the assistance of a fluid such as sea water, a hydraulic power plant (23, 24) driven by said turbine and arranged in such manner as to feed said hydraulic motors, and a head forming a first distribution box (15) for feeding the turbine and discharging the spoil, said head being connected by a twin-channel duct (14) to a second distribution box (13), connected on the one hand to means (2) for providing the feeding fluid to the turbine, and on the other hand to a flexible duct (18) for the spoil discharge.
2. A device according to claim 1, characterised by the fact that it includes two cutters of horizontal axes, rotating in reverse directions.
3. A device according to any one of claims 1 and 2, characterised by the fact that the hydraulic turbine is provided with a discharge valve (20).
4. A device according to any one of claims 1 to 3, characterised by the fact that the exhaust (21) of the turbine is directed towards the cutter tools.
5. A device according to any one of claims 1 to 4, characterised by the fact that said hydraulic power plant includes a plurality of hydraulic pumps (24) driven by said turbine via a mechanical distribution box (23).
6. A device according to any one of claims 1 to 5, characterised by the fact that said head is connected to the device body by at least one advance jack (30) fed by said hydraulic power plant.
EP87400902A 1986-04-17 1987-04-17 Device for the under water drilling of foundations Expired EP0242307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605529A FR2597543B1 (en) 1986-04-17 1986-04-17 DEVICE FOR UNDERWATER DRILLING OF FOUNDATIONS
FR8605529 1986-04-17

Publications (2)

Publication Number Publication Date
EP0242307A1 EP0242307A1 (en) 1987-10-21
EP0242307B1 true EP0242307B1 (en) 1989-07-26

Family

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EP87400902A Expired EP0242307B1 (en) 1986-04-17 1987-04-17 Device for the under water drilling of foundations

Country Status (13)

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US (1) US4770255A (en)
EP (1) EP0242307B1 (en)
JP (1) JPS6311785A (en)
AU (1) AU592425B2 (en)
BR (1) BR8701830A (en)
CA (1) CA1273624A (en)
DE (1) DE3760372D1 (en)
ES (1) ES2009847B3 (en)
FR (1) FR2597543B1 (en)
IN (1) IN168725B (en)
NO (1) NO871592L (en)
TN (1) TNSN87055A1 (en)
ZA (1) ZA872753B (en)

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FR2806111B1 (en) * 2000-03-13 2002-06-14 Cie Du Sol HARD GROUND DRILLING APPARATUS
GB2377412A (en) * 2000-11-03 2003-01-15 Lawborough Consultants Ltd Support vessel for self-burying mines
KR100465007B1 (en) * 2003-12-06 2005-01-14 강대우 Boring machine in underwater differential global positioning system and boring method using the same
DE102005017093B4 (en) * 2004-08-12 2008-07-24 Bauer Maschinen Gmbh Milling machine and method of working the soil
NO333844B1 (en) * 2010-11-09 2013-09-30 Agr Subsea As A method for establishing a borehole in a seabed and a conductor pipe and a suction module for carrying out the method
EP2562310B1 (en) * 2011-08-23 2016-07-20 BAUER Maschinen GmbH Submarine drilling assembly and method for producing a borehole in a sea floor
EP2562346B1 (en) 2011-08-23 2019-03-13 BAUER Maschinen GmbH Underwater drilling assembly and method for producing a borehole
EP2562348B1 (en) * 2011-08-23 2017-10-04 BAUER Maschinen GmbH Underwater drilling assembly and method for producing a borehole
FR3001251B1 (en) * 2013-01-23 2017-05-26 Soletanche Freyssinet METHOD FOR DETERMINING THE POSITION OF A CUTTING DEVICE IN THE SOIL USING A MOBILE CART
PT3330441T (en) * 2016-12-02 2019-06-19 Bauer Maschinen Gmbh Underwater excavation device and method for excavation
CN107100627B (en) * 2017-04-10 2018-04-13 青岛海洋地质研究所 Deep-sea hydrothermal metal sulfide mineral deposit original position implant system
DE102017112418A1 (en) * 2017-06-06 2018-12-06 Liebherr-Werk Nenzing Gmbh Work machine with an attachment, in particular a trench cutter, and attachment, in particular trench cutter
EP3564446B1 (en) * 2018-05-03 2020-04-29 BAUER Maschinen GmbH Underwater excavation device and method for excavation
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Also Published As

Publication number Publication date
BR8701830A (en) 1988-01-26
FR2597543A1 (en) 1987-10-23
CA1273624A (en) 1990-09-04
ZA872753B (en) 1987-10-05
NO871592D0 (en) 1987-04-14
IN168725B (en) 1991-05-25
TNSN87055A1 (en) 1990-01-01
NO871592L (en) 1987-10-19
ES2009847B3 (en) 1989-10-16
JPS6311785A (en) 1988-01-19
FR2597543B1 (en) 1988-06-24
AU592425B2 (en) 1990-01-11
DE3760372D1 (en) 1989-08-31
EP0242307A1 (en) 1987-10-21
AU7176287A (en) 1987-10-22
US4770255A (en) 1988-09-13

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