EP3394381B1 - Seabed drill system - Google Patents
Seabed drill system Download PDFInfo
- Publication number
- EP3394381B1 EP3394381B1 EP15816793.2A EP15816793A EP3394381B1 EP 3394381 B1 EP3394381 B1 EP 3394381B1 EP 15816793 A EP15816793 A EP 15816793A EP 3394381 B1 EP3394381 B1 EP 3394381B1
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- EP
- European Patent Office
- Prior art keywords
- drill
- seabed
- module
- arm
- core
- 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.)
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- 238000005553 drilling Methods 0.000 claims description 33
- 239000000523 sample Substances 0.000 claims description 28
- 239000002689 soil Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000011835 investigation Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Classifications
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/024—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting having means for adapting to inclined terrain; having means for stabilizing the vehicle while 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/02—Supports for the drilling machine, e.g. derricks or masts 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole
- E21B19/143—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
- E21B49/025—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil of underwater soil, e.g. with grab devices
-
- 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
- E21B7/124—Underwater drilling with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
Definitions
- the present invention refers to a seabed drill system, for geotechnical site investigation for the installation of an offshore wind park.
- the towers, cables and other structures that constitute an Offshore Wind (OW) park are supported on the seafloor.
- the characteristics of the soils and rocks present at any site are crucial for the OW park design: insufficient site knowledge may seriously jeopardize installation and/or operation. Developers have stopped projects at a very advanced stage quoting poor geotechnical conditions.
- Geotechnical Site Investigation for OW today implies taking soil and rock samples from scarce and expensive jack-up platforms and/or specialist geotechnical drilling vessels in a process that is slow and very sensitive to weather conditions. Geotechnical site investigation is thus a bottleneck for OW park developers.
- Remotely operated submarine sampling systems make site investigation more resilient to bad weather conditions and use smaller, easily available supply vessels. They can thus offer a substantial reduction in development cost and extend the time window for GSI.
- US2013206476 A1 discloses a drilling system including a drill head.
- the drill head defines a drill head bore and includes a drill head bore closure device.
- An inner core barrel and an inner core barrel retrieval device may be passed through the interior of the drill string and the drill head bore when the drill head is connected with the drill string and the drill head bore closure device is actuated to an open position.
- EP2860341 A1 discloses a driving apparatus for driving pipes into the sea bed is disclosed.
- the driving apparatus has support arms supporting a drill tower for driving pipes into the sea bed, and a body for supporting a plurality of pipes in cassettes.
- US2009255728 A1 discloses a device and a method for seabed and water bottom drilling, core sampling and measuring, include a vertically movable and horizontally fixed cross beam, a winch fixed to the cross beam and having a rope wound thereon, a drill head disposed on the cross beam, a spindle having a bore formed therein and being driven by the drill head and an overshot having one end connected to the rope and another end passing through the bore in the spindle for attachment to and detachment from a drilling tool of a drill string.
- US3741320 A discloses an off-shore drilling assembly comprising a main body adapted to be positioned on the sea bottom and including an axially movable drill for rotating a drill string which includes a core barrel assembly provided with a detachable and replaceable inner tube assembly for receiving and retaining a core, and a feeding device for displacing the drill axially.
- the objective of the present invention is to provide a seabed drill system designed with a modular approach that enables to use smaller and lighter configurations in circumstances when all the depth drilling capability is not required.
- the seabed drill system comprises a drilling mast module for drill rods, said drill rods drilling the seabed, comprising:
- the seabed drill system according to the invention can also comprise a base comprising a plurality of adjustable feet.
- the seabed drill system according to the invention can also comprise two gantry automated arm modules, one for the core barrel rack module and one for the drill rack module, which also collect and move the core barrels and the drill rods, respectively.
- the acoustic sample checker module comprises an acoustic probe, such as a short range acoustic phased-array probe.
- each gantry automated arm module comprises a grabber for grabbing one drill rod or one core barrel.
- the base can comprise four feet which are independently adjustable in height.
- the arm of the remotely operated arm module comprises a grabber at one of its ends, said grabber being rotatable, and the arm of the remotely operated arm module is preferably mounted on a position table, which is rotatable.
- the frame of the core barrel rack module and/or the frame of the drill rod rack module comprise security locks for fixing the core barrels and/or the drill rods in their position in the frame.
- the drill system responds to a modular concept, which enables different borehole diameter options and multiple combinations of push-sampler tools in situ (CPT) test in the same deployment.
- the main features of the drill system are:
- Fig. 1 The seabed drilling system of the disclosure according to one non-limitative embodiment is shown in Fig. 1 .
- the drilling mast module 1 comprises a winch 11, a plurality of clamps 12, a flushing head 13, a head carriage 14 with side shift, a rotary head 15, a heavy duty mast 16, a feed cylinder 17 and a base support 18.
- this drilling mast 1 module is variable, e.g. between 3 and 9 meters, and the section of the cylinder can be also changed for providing more or less force. Furthermore, this module can include or not the winch 11.
- this module comprises a remote operated hydraulic arm 21, a heavy duty grabber 22 and a position table 23.
- the hydraulic arm 21 can be programmed for carrying out a lot of operations, both manually and automatically. E.g. this hydraulic arm 21 can provide a maximum load of 300 Kg at 2,500 mm, and a closed loop position of each axis permits an easy operator guidance and automation.
- the heavy duty grabber 22 provides, e.g. a 75° wrist rotation and a 135 mm opening, and the position table 23 has a fixed height and provides a 350° turn.
- This module comprises a plurality of core barrels 31 and it can comprise several bit outer barrels 32, a rack frame 33 for securing the barrels 31, 32 and a transport and mobilization security lock system 34.
- This module is configured according to the scheme of geotechnical provisions, and it can include up to 110 barrels per rack, and each barrel can be of 1,500 mm length.
- This module comprises a modular frame 41, a plurality of drill rods 42, a security lock 44 and a gliding tray 45.
- the modular frame 41 comprises several separated sections, each one for every rod size, which an individual locking device, which is configurable according to the expected operations.
- This module comprises a plurality of adjustable feet and its main functions are to stabilize the perpendicularity of the drill pipe of the seabed drill on the sea bed, and gently landing on the sea bottom to minimize deformation by impact of the borehole and set the unit to seabed slopes.
- This module comprises a support frame 61 for recovering a core barrel and an acoustic probe 62.
- This probe is preferably a short range acoustic phased-array probe that detects in few seconds the presence of soil sample in the core and at which height of recovery has been possible, and it could be also used as a general indicator of soil density and particle size.
- the main function of this module is to detect the presence of physical sample inside the core barrel, previously to the recovery in the borehole top, in such a way that can be assessed the quality of each partial probe operation and thus allow for corrections in the next operation.
- This module comprises a hydraulic system 72 provided with a gearmotor 75 with a closed loop position control mounted on a guided beam 73, and a grabber 74.
- the grabber 74 is preferably double and grabs a drill rod 42 or a core barrel 31, because the drill system comprises two gantry automated arm modules, one for the core barrel rack module 3 and one for the drill rod rack module 4.
- the grabber 74 can be moved in any direction along the x, y, z axes, to correctly place the drill rods 42 and the core barrels 31 in position.
- the drill system must be placed on the seabed in a gently manner.
- the drill system comprises the base 5 in which the height of the feet 51 is independently adjustable for compensating the slopes or obstacles of the seabed.
- the rotary head 15 rotates and the feed cylinder 17 pushes simultaneously the bit outer barrels 32 ( Fig. 9 ).
- the rotation speed depends on the kind of seabed.
- the rotary head 15 is moved apart, the grabber 74 take the barrels 32 with the samples.
- the grabber 75 moves the barrels 32 with the sample to the sample checker 6, and once checked, the grabber 75 releases them and the arm 21 places them in the modular frame 41 ( Fig. 10 ).
- the check consists in a longitudinal acoustic sweep in different sections, and analyzing the acoustic echo it can be determined if there is a solid sample or just water.
- the next core barrel 31 will be collected by the grabber 74 to place it in determined position in the rack frame 33, and then it is collected by the arm 21, which will place it inside the several barrels 32.
- the core barrel 31 slides freely inside the barrels 32 up to the rotary head 15, where it is engaged with a section of the barrel 32. Then, the rotary head 15 rotates and pushes again said core barrel 31.
- a drill rod 42 is placed inside the barrels 32 for perforating a next length.
- the gantry arm 7 is moved to the first available drill rod 42, grabbing it and placing it at a predetermined external zone of the modular frame 41 ( Fig. 11 ).
- the arm 2 takes the drill rod 42 and it is also grabbed by the grabber 74 of the gantry arm 7 ( Fig. 12 ), and the drill rod 42 is rotated to be threaded, and the drill rod 42 is placed inside the barrels 32 for perforating an additional length.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Earth Drilling (AREA)
- Sampling And Sample Adjustment (AREA)
Description
- The present invention refers to a seabed drill system, for geotechnical site investigation for the installation of an offshore wind park.
- The towers, cables and other structures that constitute an Offshore Wind (OW) park are supported on the seafloor. The characteristics of the soils and rocks present at any site are crucial for the OW park design: insufficient site knowledge may seriously jeopardize installation and/or operation. Developers have stopped projects at a very advanced stage quoting poor geotechnical conditions.
- Geotechnical Site Investigation (GSI) for OW today implies taking soil and rock samples from scarce and expensive jack-up platforms and/or specialist geotechnical drilling vessels in a process that is slow and very sensitive to weather conditions. Geotechnical site investigation is thus a bottleneck for OW park developers.
- Remotely operated submarine sampling systems make site investigation more resilient to bad weather conditions and use smaller, easily available supply vessels. They can thus offer a substantial reduction in development cost and extend the time window for GSI.
- OW field developers face increasing construction costs. Substructure optimization is desirable but cannot be easily achieved without enough geotechnical site investigation.
- Improve acquisition and range of geotechnical data for the OWT design contributes to reducing the safety factors and implies an effective cost reduction in the overall design. The customers of offshore soil investigations for OW developments are ultimately the field developers (utilities, renewable investors). They may act through their in-house technical team or through a subcontractor. In a few cases a contractor may be responsible for acquiring soil data, but this is still rare.
- Several companies provide now subsea drilling on a commercial basis to the offshore GSI market at large, but they have entered the offshore GSI wind market only briefly. There are various reasons for this:
All the existing seabed drilling machines were designed to sustain up to several km of water pressure. While the machines may be conceptually similar, this water depth requirement results in far more expensive components, requiring larger investment and maintenance costs. - Existing seabed drills are all restricted to either wire-line or drill-string perforation. These methods are both capable of perforating most terrains, but they have optimal performance in a more restricted set of circumstances (wire-line in competent rock, drill-string in soft soil). In fact, one complaint levered sometimes at previous seabed drill systems, has been a relatively low recovery rate. OW development sites are very large by offshore standards and in them it is likely to find varied terrains.
- Existing seabed drills have not been designed with a modular approach that enables to use smaller and lighter configurations in circumstances when all the depth drilling capability is not required.
- Not all the existing seabed drills have the ability to also carry on CPT (Cone Penetration Testing). The inputs from seismic CPT are key to advanced design of monopiles, the foundation of choice for most OW.
- Not all the existing seabed drills have developed their own in-house robotics. Using off-the-shelf robotics makes difficult the fast manipulation of drill strings and samplers.
- Because of carrying larger in-built costs and because the relative efficiency gains of seabed drilling are even larger in deepwater, these machines have oriented themselves to the deepwater market, where more lucrative rates can be obtained than in OW.
- Indeed, information from market sources indicates that the ongoing daily rates commandeered by the more commercially active systems are well above even those of geotechnical drilling vessel. Of course, they compensate this by more efficient performance and, crucially in certain deepwater environments, by their weather resilience.
- In should be also noticed that for operators that are heavily invested on geotechnical drilling vessel there is little incentive in developing cheaper systems that might be seen as a market-wide alternative to geotechnical drilling vessel. From that point of view expensive, deepwater oriented, niche seabed units are preferable.
-
US2013206476 A1 discloses a drilling system including a drill head. The drill head defines a drill head bore and includes a drill head bore closure device. An inner core barrel and an inner core barrel retrieval device may be passed through the interior of the drill string and the drill head bore when the drill head is connected with the drill string and the drill head bore closure device is actuated to an open position. -
EP2860341 A1 discloses a driving apparatus for driving pipes into the sea bed is disclosed. The driving apparatus has support arms supporting a drill tower for driving pipes into the sea bed, and a body for supporting a plurality of pipes in cassettes. -
US2009255728 A1 discloses a device and a method for seabed and water bottom drilling, core sampling and measuring, include a vertically movable and horizontally fixed cross beam, a winch fixed to the cross beam and having a rope wound thereon, a drill head disposed on the cross beam, a spindle having a bore formed therein and being driven by the drill head and an overshot having one end connected to the rope and another end passing through the bore in the spindle for attachment to and detachment from a drilling tool of a drill string. -
US3741320 A discloses an off-shore drilling assembly comprising a main body adapted to be positioned on the sea bottom and including an axially movable drill for rotating a drill string which includes a core barrel assembly provided with a detachable and replaceable inner tube assembly for receiving and retaining a core, and a feeding device for displacing the drill axially. - Therefore, the objective of the present invention is to provide a seabed drill system designed with a modular approach that enables to use smaller and lighter configurations in circumstances when all the depth drilling capability is not required.
- With the seabed drill system of the invention said drawbacks can be solved, presenting other advantages that will be described hereinafter.
- The seabed drill system according to the invention comprises a drilling mast module for drill rods, said drill rods drilling the seabed, comprising:
- a core barrel rack module comprising a frame for placing core barrels;
- a drill rack module comprising a frame for placing the drill rods; and
- a remotely operated arm module provided with an arm for collecting and moving said drill rods and/or said core barrels from the rack modules to the drilling mast, or vice versa; and
- Advantageously, the seabed drill system according to the invention can also comprise a base comprising a plurality of adjustable feet.
- Furthermore, the seabed drill system according to the invention can also comprise two gantry automated arm modules, one for the core barrel rack module and one for the drill rack module, which also collect and move the core barrels and the drill rods, respectively.
- Preferably, the acoustic sample checker module comprises an acoustic probe, such as a short range acoustic phased-array probe.
- According to a preferred embodiment, each gantry automated arm module comprises a grabber for grabbing one drill rod or one core barrel.
- Preferably, the base can comprise four feet which are independently adjustable in height.
- Advantageously, the arm of the remotely operated arm module comprises a grabber at one of its ends, said grabber being rotatable, and the arm of the remotely operated arm module is preferably mounted on a position table, which is rotatable. According to a preferred embodiment, the frame of the core barrel rack module and/or the frame of the drill rod rack module comprise security locks for fixing the core barrels and/or the drill rods in their position in the frame.
- The drill system according to the disclosure responds to a modular concept, which enables different borehole diameter options and multiple combinations of push-sampler tools in situ (CPT) test in the same deployment. The main features of the drill system are:
- operational in water depths up to 500 m;
- continuous drilling and/or soft-soil sampling up to 100 m depth below sea floor;
- acoustic sample retrieval check at the seafloor;
- continuous push CPTu unit up to 100 m depth below sea floor;
- seismic measurement unit integrated in CPTu;
- real-time acquisition of drilling and probing (CPTu) parameters;
- selection and installation of the tools to be used. It can be adapted or modified in each investigation to be performed;
- the system lands on the seabed and stabilizes. Two twin overhead lines are used for power cables and lifting;
- drilling: rotation with inverse mud circulation;
- better daily rates than those currently commanded by drilling vessels or large jack-up systems;
- increased flexibility in planning (not need to wait for good weather and/or for specialist drilling vessel);
- health and safety: no drill operators acting on the vessel floor, that results in an intrinsically safer operation;
- better adapted to obtain design parameters of use in OW foundation design, with consequent cost savings in infrastructure design.
- For a better comprehension of what has been disclosed, some drawings are attached in which, diagrammatically and only as a non-limitative example, a practical embodiment is shown.
-
Fig. 1 is a perspective view of the drill system according to one embodiment of the disclosure; -
Fig. 2 is a perspective view of the drilling mast module of the drill system according to the disclosure; -
Fig. 3 is a perspective view of the remotely operated arm module of the drill system according to the disclosure; -
Fig. 4 is a perspective view of the core barrel rack module of the drill system according to the disclosure; -
Fig. 5 is a perspective view of the drill rod rack module of the drill system according to the disclosure; -
Fig. 6 is a perspective view of the acoustic sample checker module of the drill system according to the disclosure; -
Fig. 7 is a perspective view of the gantry automated arm module of the drill system according to the disclosure; and -
Figs. 8-12 are perspective views showing how the operation of the drilling system according to the present disclosure. - The seabed drilling system of the disclosure according to one non-limitative embodiment is shown in
Fig. 1 . - The drilling system according to this embodiment comprises the following modules:
- a
drilling mast 1; - a remotely operated
arm 2 provided with agrabber 22 for collecting and movingdrill rods 42 and core barrels 31; - a
core barrel rack 3 for placing the core barrels 31; - a
drill rock rack 4 for placing thedrill rods 42; - a
base 5 comprising feet 51; - an
acoustic sample checker 6 that detects the presence of a sample inside acore barrel 31; - two gantry automated
arms 7, one for thecore barrel rack 3 and one for thedrill rock rack 4, which also collect and move the core barrels 31 and thedrill rods 41, respectively. - Hereinafter a description of each module is provided:
- As shown in
Fig. 2 , thedrilling mast module 1 according to this embodiment comprises awinch 11, a plurality ofclamps 12, a flushinghead 13, ahead carriage 14 with side shift, arotary head 15, aheavy duty mast 16, afeed cylinder 17 and abase support 18. - The height of this
drilling mast 1 module is variable, e.g. between 3 and 9 meters, and the section of the cylinder can be also changed for providing more or less force. Furthermore, this module can include or not thewinch 11. - As shown in
Fig. 3 , this module comprises a remote operatedhydraulic arm 21, aheavy duty grabber 22 and a position table 23. - The
hydraulic arm 21 can be programmed for carrying out a lot of operations, both manually and automatically. E.g. thishydraulic arm 21 can provide a maximum load of 300 Kg at 2,500 mm, and a closed loop position of each axis permits an easy operator guidance and automation. - The
heavy duty grabber 22 provides, e.g. a 75° wrist rotation and a 135 mm opening, and the position table 23 has a fixed height and provides a 350° turn. - This module comprises a plurality of core barrels 31 and it can comprise several bit
outer barrels 32, arack frame 33 for securing thebarrels - This module is configured according to the scheme of geotechnical provisions, and it can include up to 110 barrels per rack, and each barrel can be of 1,500 mm length.
- This module comprises a
modular frame 41, a plurality ofdrill rods 42, asecurity lock 44 and a glidingtray 45. - The
modular frame 41 comprises several separated sections, each one for every rod size, which an individual locking device, which is configurable according to the expected operations. - This module comprises a plurality of adjustable feet and its main functions are to stabilize the perpendicularity of the drill pipe of the seabed drill on the sea bed, and gently landing on the sea bottom to minimize deformation by impact of the borehole and set the unit to seabed slopes.
- This module comprises a
support frame 61 for recovering a core barrel and anacoustic probe 62. This probe is preferably a short range acoustic phased-array probe that detects in few seconds the presence of soil sample in the core and at which height of recovery has been possible, and it could be also used as a general indicator of soil density and particle size. - The main function of this module is to detect the presence of physical sample inside the core barrel, previously to the recovery in the borehole top, in such a way that can be assessed the quality of each partial probe operation and thus allow for corrections in the next operation.
- With this module it is possible to get the evolution in the effective recovery of each sample (which is very important in soft soils) from the first operation until his complete wireline hoisting inside the borehole, transport operation of core barrels to the samples rack and the hoisting of the complete underwater module up to the surface, with variations of temperature, pressure and water.
- This module comprises a
hydraulic system 72 provided with a gearmotor 75 with a closed loop position control mounted on a guidedbeam 73, and agrabber 74. - The
grabber 74 is preferably double and grabs adrill rod 42 or acore barrel 31, because the drill system comprises two gantry automated arm modules, one for the corebarrel rack module 3 and one for the drillrod rack module 4. - The
grabber 74 can be moved in any direction along the x, y, z axes, to correctly place thedrill rods 42 and the core barrels 31 in position. - Hereinafter the operation of the seabed drill system of the invention according to a preferred embodiment will be described.
- Firstly, the drill system according to the disclosure must be placed on the seabed in a gently manner. To this end, the drill system comprises the
base 5 in which the height of the feet 51 is independently adjustable for compensating the slopes or obstacles of the seabed. - Then, several bit
outer barrels 32 are firstly placed by thearm 21 in the drilling mast module 1 (Fig. 8 ). - Once placed, the
rotary head 15 rotates and thefeed cylinder 17 pushes simultaneously the bit outer barrels 32 (Fig. 9 ). The rotation speed depends on the kind of seabed. - When the bit out
barrels 32 arrive to the maximum depth, it is considered that the seabed sample occupies its position inside them. - Once perforated, the
rotary head 15 is moved apart, thegrabber 74 take thebarrels 32 with the samples. - The
grabber 75 moves thebarrels 32 with the sample to thesample checker 6, and once checked, thegrabber 75 releases them and thearm 21 places them in the modular frame 41 (Fig. 10 ). - The check consists in a longitudinal acoustic sweep in different sections, and analyzing the acoustic echo it can be determined if there is a solid sample or just water.
- Once the sample is in its position, the
next core barrel 31 will be collected by thegrabber 74 to place it in determined position in therack frame 33, and then it is collected by thearm 21, which will place it inside the several barrels 32. - Once placed, the
core barrel 31 slides freely inside thebarrels 32 up to therotary head 15, where it is engaged with a section of thebarrel 32. Then, therotary head 15 rotates and pushes again saidcore barrel 31. - Then, a
drill rod 42 is placed inside thebarrels 32 for perforating a next length. Thegantry arm 7 is moved to the firstavailable drill rod 42, grabbing it and placing it at a predetermined external zone of the modular frame 41 (Fig. 11 ). - Once in this zone, the
arm 2 takes thedrill rod 42 and it is also grabbed by thegrabber 74 of the gantry arm 7 (Fig. 12 ), and thedrill rod 42 is rotated to be threaded, and thedrill rod 42 is placed inside thebarrels 32 for perforating an additional length. - The recovery of the
drill rods 42 is done in the same way, but with inverted steps. - Even though reference is made to a specific embodiment of the invention, it is clear for a person skilled in the art that the disclosed seabed drill system is susceptible of variations and modifications, and that all the details cited can be substituted by other technically equivalent ones, without departing from the scope of protection defined by the attached claims.
Claims (12)
- Seabed drill system, comprising a drilling mast module (1) for drill rods (42), said drill rods (42) drilling the seabed, comprising:- a core barrel rack module (3) comprising a frame (33) for placing core barrels (31);- a drill rack module (4) comprising a frame (41) for placing the drill rods (42); and- a remotely operated arm module (2) provided with an arm (21) for collecting and moving said drill rods (42) and/or said core ballels (31) from the rack modules (3, 4) to the drilling mast, or vice versa,
characterized in that the system also comprises an acoustic sample checker module (6) that detects the presence of a sample inside a core barrel (31). - Seabed drill system according to claim 1, wherein it also comprises a base (5) comprising a plurality of adjustable feet (51).
- Seabed drill system according to claim 1, wherein it also comprises two gantry automated arm modules (7), one for the core barrel rack module (3) and one for the drill rack module (4), which also collect and move the core barrels (31) and the drill rods (41), respectively.
- Seabed drill system according to claim 1, wherein the acoustic sample checker module (6) comprises an acoustic probe (62).
- Seabed drill system according to claim 4, wherein the probe (62) is a short range acoustic phased-array probe.
- Seabed drill system according to claim 3, wherein each gantry automated arm module (7) comprises a grabber (74) for grabbing one drill rod (42) or one core barrel (31).
- Seabed drill system according to claim 2, wherein the base (5) comprises four feet (51) which are independently adjustable in height.
- Seabed drill system according to claim 1, wherein the arm (21) of the remotely operated arm module (2) comprises a grabber (22) at one of its ends.
- Seabed drill system according to claim 8, wherein said grabber (22) of the arm (21) is rotatable.
- Seabed drill system according to claim 1, wherein the arm (21) of the remotely operated arm module (2) is mounted on a position table (23).
- Seabed drill system according to claim 10, wherein said position table (23) is rotatable.
- Seabed drill system according to claim 1, wherein the frame (33) of the core barrel rack module (3) and/or the frame (41) of the drill rod rack module (4) comprise security locks (33, 44) for fixing the core barrels (31) and/or the drill rods (42) in their position in the frame (33, 41).
Applications Claiming Priority (1)
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PCT/EP2015/080997 WO2017108098A1 (en) | 2015-12-22 | 2015-12-22 | Seabed drill system |
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EP3394381A1 EP3394381A1 (en) | 2018-10-31 |
EP3394381B1 true EP3394381B1 (en) | 2019-09-04 |
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EP15816793.2A Active EP3394381B1 (en) | 2015-12-22 | 2015-12-22 | Seabed drill system |
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EP (1) | EP3394381B1 (en) |
ES (1) | ES2759604T3 (en) |
WO (1) | WO2017108098A1 (en) |
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CN106368627B (en) * | 2016-11-24 | 2019-01-08 | 中国地质大学(武汉) | A kind of offshore drilling platform automatic loading and unloading drill sting device |
CN107448145B (en) * | 2017-09-06 | 2023-03-31 | 长沙矿山研究院有限责任公司 | Seabed deep hole drilling machine and operation method |
CN109505594B (en) * | 2017-10-28 | 2022-09-06 | 江苏泰洁检测技术股份有限公司 | Seabed soil collection vehicle |
BR112020023526A2 (en) * | 2018-05-24 | 2021-02-09 | Benthic Usa Llc | double rotation geotechnical lifting drill |
CN111206925B (en) * | 2020-01-19 | 2023-06-30 | 中煤浙江勘测设计有限公司 | Directional drilling system and directional drilling method |
ES2888924A1 (en) * | 2020-06-29 | 2022-01-10 | Geociencias Y Exploraciones Marinas S L | Machine and procedure for underwater soundings (Machine-translation by Google Translate, not legally binding) |
NL2033255B1 (en) * | 2022-10-07 | 2024-04-19 | Fnv Ip Bv | Remotely operated ground testing apparatus and method |
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US3741320A (en) * | 1971-07-12 | 1973-06-26 | Atlas Copco Ab | Subsea drilling assembly |
JP2011516767A (en) * | 2008-04-14 | 2011-05-26 | ペリー シリングズビー システムズ インコーポレイテッド | Wireline drilling system and method |
CA2802872C (en) * | 2010-06-30 | 2015-05-19 | Marl Technologies Inc. | Remotely operable underwater drilling system and drilling method |
CN102220841B (en) * | 2011-05-23 | 2012-12-26 | 中国地质大学(武汉) | Submarine sampling drilling rig |
EP2860341A1 (en) * | 2013-10-10 | 2015-04-15 | Soil Machine Dynamics Limited | Subsea support apparatus for supporting drive means, and driving apparatus incorporating such support apparatus |
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2015
- 2015-12-22 EP EP15816793.2A patent/EP3394381B1/en active Active
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WO2017108098A1 (en) | 2017-06-29 |
ES2759604T3 (en) | 2020-05-11 |
EP3394381A1 (en) | 2018-10-31 |
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