US3533478A - Drilling machine,in particular for offshore drilling - Google Patents

Drilling machine,in particular for offshore drilling Download PDF

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Publication number
US3533478A
US3533478A US774012A US3533478DA US3533478A US 3533478 A US3533478 A US 3533478A US 774012 A US774012 A US 774012A US 3533478D A US3533478D A US 3533478DA US 3533478 A US3533478 A US 3533478A
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United States
Prior art keywords
machine
drilling
string
drill pipes
pushing
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Expired - Lifetime
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US774012A
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English (en)
Inventor
Jean-Michel Marie Tissier
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.)
SPIE-CAPAG A CORP OF FRANCE
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JEAN MICHEL MARIE TISSIER
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Publication of US3533478A publication Critical patent/US3533478A/en
Assigned to ANCHOR SYSTEMS reassignment ANCHOR SYSTEMS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: TISSIER, JEAN-MICHEL
Assigned to SPIE-OFFSHORE reassignment SPIE-OFFSHORE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ANCHOR SYSTEMS
Assigned to SPIE-CAPAG A CORP OF FRANCE reassignment SPIE-CAPAG A CORP OF FRANCE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPIE-OFFSHORE
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/12Underwater drilling
    • E21B7/124Underwater drilling with underwater tool drive prime mover, e.g. portable drilling rigs for use on underwater floors
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/18Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being specially adapted for operation under water
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing 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
    • E21B49/02Testing 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
    • E21B49/025Testing 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
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00Tool driving or impacting
    • Y10S173/01Operable submerged in liquid
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/17Rotary driven device adjustable during operation relative to its supporting structure
    • Y10T74/173Screw and nut adjusting means

Definitions

  • the drilling machine in particular for offshore or underwater drillings, comprises a crane consisting of a bracket secured to a base resting on the ground through the 7 medium of legs, a turn table capable of rotating a string of drill pipes, a pushing device for instance of the screw pushing type, capable of driving bits and strings of pipes into the ground, a screwing and unscrewing device for the strings of pipes and a device for pulling out strings of pipes and drilling cores,
  • the machine is powered'by pressurized hydraulic fluid actuated motors and cylinders individually driving the members of the machine, and notably the turn table the pushing screw, the baselegs and members for tightening or holding the string of drill pipes.
  • the present invention relates essentially to a drilling machine, in particularv for offshore or under water drilling, of the type comprising a frame consisting of a bracket secured to a base resting on the ground (in particular on a sea bed) by means of legs, a device called turntable capable of rotating a string of drill pipes, a pushing device, for instance a screw type pushing device, capable of driving drilling bits and strings of drill pipes into the ground, a device for screwing and unscrewing strings of drill pipes, as well as a device for pulling out drilling pipes and cores in particular.
  • the machine according to the invention is an improved version of a machine described in the French Pat. No. l,499,2l5 entitled: Method of offshore drilling and equipment for putting the said method into practice.
  • the said patent disclosed an entirely novel technique according to which the drilling was performed by means of an immersed machine suitably anchored to the sea bed to be drilled.
  • the present invention relates to an improved machine of novel design, remarkable by its adaptability and convenience in underwater use and allowing to reduce to a minimum the operations to be carried out by the divers. Practically, the latter are only required to supervise the machine operated at a particularly high working rate.
  • the machine is powered by means of a pressurized hydraulic fluid which actuates the hydraulic motors and cylinders controlling the various members of the machine such as a turntable, a
  • the pressurized hydraulic fluid is provided by a hydraulic power plant composed, for instance, of a diesel engine driving a variable displacement and pressure pump, the said plant being mounted aboard the said ship anchored above the machine.
  • This diesel engine advantageously drivesa slush pump ensuring the lubrication of the string of drill pipes during the course of drilling and a low voltage generator for feeding auxiliary controls and the underwater illuminating system.
  • the machine and the power plant are interconnected by means of flexible cables and pipes. The latter are designed so as to be capable of being rapidly provided with extensions (rapid couplings), and check valves are provided in the various circuits to prevent hydraulic fluid losses and water inflows in case of pipe breakage.
  • the hydraulic motors used with the drilling machine advantageously consist of variable speed motors with rotating speeds ranging, for instance, from a few fractions of a revolution per minute to several hundreds or thousands of revolutions per minute.
  • all the rotating members and control members of the machine lie in pressurized hydraulic fluid, and this prevents water, in particular corrosive sea water, from unduly entering the machine, whereby the life of the various members of the machine is considerably extended.
  • separate motors are provided, in particular, for the-tumtable and for the motion of translation of the pushing screw.
  • the motions of rotation and translation of the drilling bit can be controlled separately during the drilling or coring operation, thus allowing to select at every moment the most appropriate rotating and driving-in speeds, depending on the nature of the soil.
  • jamming of the bit and premature breakage of the drilling crowns are avoided.
  • each supporting leg of the machine (preferably provided with three legs) may be raised or lowered by means of a separate hydraulic motor provided with a separate control.
  • a separate hydraulic motor provided with a separate control.
  • the bracket maybe tilted with respect to the base so as to form a certain angle with the vertical; this motion is controlled, for instance, by a hydraulic cylinder, said bracket being hinged on the base through the medium of a substantially horizontal axis.
  • the pushing screw for the drill pipes is pivotably mounted by means of ball-and-socket devices at either ends thereof, thus enabling to take up plays and ensuring the operation of the screw in the best possible conditions.
  • the tightening device for the string of drill pipes comprises a hydraulic vice or holder. Divers work is thus reduced to a minimum, more especially as a guiding vice, for instance a hand-operated guiding vice, is advantageously provided above the tightening vice. According to an improved modification the feeding of the drill pipes may be performed entirely automatically.
  • the frame of the machine consists, at least partially, of impervious box girders filled with a fluid, for instance a hydraulic fluid, the latter being advantageously maintained at a pressure substantially equal to the hydrostatic pressure of the surrounding medium.
  • the screwing sleeve for the string of drill pipes is mounted so as to be slidingly translated along a given path on the driving head of the string of drill pipes, the said sleeve rotating integrally therewith.
  • the screwing handle forms a cylinder and the end of the driving head forms a piston, the whole thus fonning a damping device when strips of drill pipes are being screwed or unscrewed.
  • FIG. 1 is a somewhat diagrammatic perspective view of the main members of the drilling machine according to the invention.v
  • FIG. 2 is an elevational view and FIG. 3 is a side view of the machine, illustrating the hinged connection between the bracket and the tripod, aswell as the operation of the legs;
  • FIG. 4 is a diagrammatic view illustrating more specifically the rotating and pushing assembly for the drive driving heads of the string of drill pipes;
  • FIG. 5 shows, at a larger scale, the turntable and the pushing assembly for the driving heads of the string of drill pipes
  • FIGS. 6 and 7 are sectional views, at a larger scale, respectively along the line VI-VI and VII-VII of FIG. 5;
  • FIG. 8 is a sectional view of the tightening holder or vice for the string of drill pipes
  • FIG. 9 is a side view of the same vice.
  • FIGS. 10 and 11 are diagrammatic views illustrating the operation of the damping device comprising a piston for pulling out the string of drill pipes.
  • a drilling machine comprises mainly: a frame composed of a bracket secured to a base 21 forming a tripod resting on the ground through the medium of legs 22; a turntable 23 and a pushing assembly 24 comprising a pushing screw 25 and a tightening device forming a vice 26 for the string of drill pipes (not shown).
  • the machine frame advantageously consists of impervious box girders filled with a pressurized hydraulic fluid. Any appropriate known type of device (not shown), such as a nitrogen container, hydraulic accumulators, a surface or automatic water-pressure actuated hydraulic control device may be provided to maintain within the box girders a pressure substantially equivalent to the hydrostatic pressure of the surrounding medium.
  • the box girders may be emptied in order to reduce the weight of the machine.
  • the box girders may also form ballast means.
  • each leg 22 comprises a base 27 by which it rests on the sea bed.
  • the bases 27 are advantageously mounted by means of a toggle or knuckle integral with threaded stems 28 which are prevented from rotating with respect to the base 21, for instance by means of longitudinal slots 29, provided on the screws 28 and cooperating with a projection (not shown) integral with the base 21.
  • Adjacent to each leg 22 is provided a hydraulic motor 30 which drives a gear (not shown) mounted in a housing 31 and engaging a nut (not shown) screwed on the screw 28 and thus controlling the motions of translation (upwards and downwards) of the legs 22.
  • Each leg 22 can thus be separately raised or lowered by simply actuating the motors 30 and, therefore, it is possible, by acting on the hydraulic drive of each motor 30, to position the base 21 correctly, that is to say horizontally, on a sea bed of any relief.
  • the skids 27 are advantageously removable or interchangeable and are mounted on the machine according to the nature of the sea bed to be drilled.
  • a pendulum to determine the correct vertical line of the location which must be placed opposite a reference mark, and also three control knobs for each motor 30 to enable correct raising or lowering of the legs.
  • the diver controlling the machine actuates a safety device to lock the motors 30 and to enable actuation of the drilling controls which otherwise are locked. This prevents troubles such as tilting of the machine during the course of drilling, eventually resulting from incorrect positioning of the machine.
  • a complementary anchoring of the legs is usually effected, for instance by means of mine bars passed through appropriate openings in the skids 27. 8
  • a hydraulic motor 32 is mounted on a turntable 23 to rotate the driving head 33 of the string of drill pipes, as described more in detail hereafter, in particular with reference to FIG. 5.
  • the turntable is mounted on a carriage 34 which is guided vertically along rails 35 fixed in any appropriatemanner to the bracket 20.
  • the pushing assembly controlling the pushing screw 25 comprises mainly a motor 36 (FIGS. 2 and 5) driving a gear 37 engaging a-nut 38 screwed o rrthe pushing screw 25 and prevented from rotating. Inorderto prevent the screw 25 from rotating while, atthe same, time, allowing it to be translated, there is provided, for instance'two diametrically opposed locking slots 39 cooperating with two projections (not shown) integral with the bracket20.
  • FIG. 1 At 40, in FIG. 1, is shown a hydraulic motor for driving a winch 41 whose function will appear more.clearly in connection with the description of FIGS. 2 and 3.
  • a hand-operated guiding vice is shown at 42 in FIG. 1 above the hydraulic tightening vice 26 of the string of drill pipes. This guiding vice enables the diver in charge of the machine to rapidly and effectively supply the various successive pipes of the string of drill pipes.
  • FIGS. 2 and 3 it can be seen how the bracket 20 hingedly mounted on a horizontal axis of two pins- 43 can be tilted by means of a hydraulic cylinder 44 through a given angle a with respect toa vertical line z'z.
  • This angle a is automatically determined by the length of the piston stroke of the cylinder 44, the said length being advantageously adjustable.
  • the angle a is selected so that when the bracket is in a tilted position, such as shown in FIG. 3 by dot-and-dash lines, the cable pulling pulley 45 of the winch 41 is exactly perpendicular to the drill hole.
  • the various drilling and coring operations are simplified and ac celerated.
  • FIG. 2 also shows in dot-and-dash lines (on the lefthand side of the FIG.) a lowermost position of a leg 22 when the machine is used, for instance, on a sharply sloped sea bed.
  • a turntable connected to its guiding carriage in lowermost position on rails 35, as well as the uppermost position 23' of the turntable in dot-and-dash lines.
  • FIGS. 4 and 5 illustrating more precisely the operation of the turntable 23 and the pushing assembly 24.
  • the hydraulic motor 36 drives a gear 37 which, in turn, rotates a gear forming a nut 48 screwed on the pushing screw 25.
  • the latter is prevented from turning with respect to the frame (the bracket 20) by means of the slot 39 (FIG. 1) and a projection integral with the frame and sliding in the said slot.
  • the rotary motion of the motor 36 compelling the nut 38 to rotate therefore results in a motion of translation of the pushing screw 25 upwards or downwards depending on the direction of rotation of the motor 36.
  • thrust bearings 46, 47 (FIG. 5) are provided to prevent translation of the nut 38 while allowing it to rotate, the said thrust bearings 46, 47 being mounted in a housing 48 maintaining the pushing assembly in a suspended state.
  • the housing 48 is hingedly mounted at 49 on the bracket 20. It is also integral with a toggle or knuckle 50 mounted in two dome-shaped bearings 51, 52 integral with the bracket. The pushing screw 25 moves freely through the toggle 50 and the bearings 51, 52.
  • the pushing action exerted by the pushing assembly 24 on the screw 25 tends to raise or lower the turntable 23, depending on the drive.
  • the pushing action of the screw 25 is transmitted to the turntable through the medium of a toggle 53 mounted in two semispherical bearings 54, 55 secured to the housing 56 of the turntable.
  • the turntable 23 moves in the vertical direction along the rails 35 and is guided by two carriages 34 each provided with, for instance, four lateral guiding rolls 57 and two longitudinal guiding rolls 58.
  • the turntable comprises a hydraulic motor 32 driving a gear 59 which, in turn, rotates a gear 60 integral with the screwing sleeves 61 of the string of drill pipes.
  • the gear 60 is rotatably mountedin the housing 56 by means of two bearings 62, 62 allowing the pushing action to be transmitted.
  • the turntable and pushing assembly just described are characterized by the following novel features: the pushing assembly 24 and the turntable 23 are respectively driven by separate hydraulic motors 36, 32.
  • This novel arrangement results in increased adaptability of the machine and improved drilling conditions, owing to the fact that it enables to vary at every moment the rotational speed of the string of drill pipes and the pushing pressure exerted on the string. in addition. it enables to use novel working methods.
  • the said head consists essentially of the gear 60 and a screwing sleeve 61.
  • the outer threaded bearing surface of the screwing sleeve 61 is seen at 53. On this bearing surface are screwed the various drill pipes of the string.
  • On the hub end of the gear 60 is screwed a piston 64 slidingly mounted in the inner cylindrical hollow 65 of the screwing sleeve 61.
  • a crown 66 fixed by means of eight screws 67 to the lateral cylindrical wall of the sleeve 61 limits the stroke of the piston within the hollow 65.
  • the driving head of the string of drill pipes operates as follows.
  • the gear 60 is-rotated by the gear 59 and the motor 32 and is translated by the pushing screw 25 acting upon the frame 56 and through the medium of the bearing 62.
  • the hub of the gear 60 thus pushes the crown 66 and the latter covers the sleeve 61.
  • a wearing ring (not shown for the sake of clarity) is provided to transmit the pushing action onto the sleeve and also to ensure a sealing between the stationary housing 56 and the rotating hub of the gear 60.
  • the piston 64 secured to the hub 60' is substantially at the bottom of the hollow 65, as shown in FIG. 5.
  • the rotation is imparted to'the handle 61 by the key 68 as described above.
  • the pushing pressure of the screw 25 is slackened by slightly raising the screw.
  • the piston 64 rises in the hollow 65.
  • the pushing position is diagrammatically shown in FIG. 10 at a larger scale, whereas the pulling position is illustrated in F IG. 7.
  • the piston 64 and the hub 60' of the gear 60 are shown as forming one piece with one another, and
  • the motor 32 is reversed and the sleeve is unscrewed on the string of drill pipes.
  • the sleeve thus rises, but this motion is permitted by the sliding of the sleeve 61 on the piston 64 even though the pushing screw 25 is not simultaneously driven upwards.
  • the thread on the string of drill pipes is prevented from being injured as was frequently the case in conventional devices where it was necessary to synchronize the upward motion of the pushing screw with the unscrewing of the string of drill pipes, in spite, of the different thread pitches of the pushing screw and the string of drill pipes.
  • the drilling mud conveyed under pressure into the string of drill pipes by the hollow pushing screw 25 and acting, in particular, in the hollow 65 between the piston 64 and the sleeve 61 form hydraulic damping means additionally favoring the unscrewing of the strings of drill pipes.
  • H65. 8 and 9 illustrate a convenient embodiment of the hydraulic vice 26. it is seen that this vice makes use of two jaws 70, 71 actuated by two hydraulic cylinders 72, 73.
  • One advantage of this device consists in that it is easy to use and drive and, in particular, in that it facilitates automation.
  • a drilling machine for underwater drillings comprising a driving head for the machine, a base, an upwardly directed bracket mounted on said base, adjustable legs for said base for resting on the ground, guideways in the bracket, a carriage movable upwards and downwards along said guideways, means mounted on said carriage for rotating the driving head of the machine, a toggle joint, a pushing screw the lower end of which bears against said carriage through said toggle joint, a nut screwed on said screw, driving means for rotating said nut, a housing connected to said bracket and hingedly mounted around an axis which is orthogonal to the direction of the pushing screw, said driving means being mounted in said housing, and means for supplying pressurized powering hydraulic fluid for rotating said driving head and said driving means of the machine.
  • variable-speed motors the rotational speed of which ranges from a few fractions of a revolution per minute to several hundreds or thousands of revolutions per minute.
  • a drillingmachine wherein said bracket is hingedly mounted atits lower end around an axis which is orthogonal to said pushing screw, an hydraulic cylinder is provided having one of its ends articulated to said base and its other end articulated to said bracket, a winch is provided at the upper end of said bracket, the stroke of said hydraulic cylinder being such that when fully extended said bracket is orthogonal to the plane of the base and when fully retracted said winch is in the vertical axis of the drilling hole.
  • a drilling machine is connected to a toggle which is mounted in two semispherical bearings secured to the upper end of said bracket, an axial here being provided insaid toggle and in said bearings and through which said pushing screw passes.
  • said driving head comprises a handle provided at its lower end with a threaded portion on which is screwed a string of drill pipes, a gear rotated by said rotating means and. having a hub, the lower face of which bears against the upper face of said handle, key means locking said nutiand said handle together in rotation, piston means solid with said hub and freely mounted in axial translation in a central cylindrical bore provided in said handle and means provided at the upper end of said handle limiting the upward movement of said piston means in said cylindrical bore.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Soil Sciences (AREA)
  • Earth Drilling (AREA)
US774012A 1967-11-07 1968-11-07 Drilling machine,in particular for offshore drilling Expired - Lifetime US3533478A (en)

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FR127223 1967-11-07

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DE (1) DE1807611A1 (xx)
FR (1) FR1568803A (xx)
NL (1) NL6815899A (xx)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476940A (en) * 1982-04-26 1984-10-16 Pdr Manufacturing Corporation Portable drilling apparatus
EP1564368A2 (en) * 2004-02-17 2005-08-17 Alessandro Bacchelli Underwater core sampling apparatus
US20060016621A1 (en) * 2004-06-09 2006-01-26 Placer Dome Technical Services Limited Method and system for deep sea drilling
US20090255728A1 (en) * 2008-04-14 2009-10-15 Tgh (Us), Inc. Wireline System
GB2470763A (en) * 2009-06-04 2010-12-08 Lance Stephen Davis Underwater drilling rig.
US20130223938A1 (en) * 2011-08-23 2013-08-29 Bauer Maschinen Gmbh Underwater work assembly and method for anchoring thereof
US20130264117A1 (en) * 2012-04-10 2013-10-10 Vetco Gray Inc Drop away funnel for modular drilling templates
US20150197989A1 (en) * 2014-01-16 2015-07-16 Conocophillips Company Underwater drilling rig assembly and method of operating the underwater drilling rig assembly
US20150330164A1 (en) * 2014-05-16 2015-11-19 Gordon FEY Downhole tool support stand, combinations, and methods
US9388649B2 (en) * 2014-04-30 2016-07-12 Fugro Engineers B.V. Offshore drilling installation and method for offshore drilling
US9903172B2 (en) * 2014-11-18 2018-02-27 Aarbakke Innovation As Subsea slanted wellhead system and BOP system with dual injector head units
US20190283841A1 (en) * 2018-03-19 2019-09-19 Resolve Marine Group, Inc. Marine salvage drill assemblies and systems
US20210178571A1 (en) * 2019-12-12 2021-06-17 C. & E. Fein Gmbh Magnetic base
US11332903B1 (en) * 2021-09-23 2022-05-17 Qingdao Institute Of Marine Geology Penetrating method of self-adjusting hydraulic static penetrating device suitable for seabed slope area

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900542A (nl) * 1989-03-06 1990-10-01 Ver Bedrijven Van Den Berg Hee Inrichting voor bodemonderzoek onder water.

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476940A (en) * 1982-04-26 1984-10-16 Pdr Manufacturing Corporation Portable drilling apparatus
EP1564368A2 (en) * 2004-02-17 2005-08-17 Alessandro Bacchelli Underwater core sampling apparatus
EP1564368A3 (en) * 2004-02-17 2005-11-09 Alessandro Bacchelli Underwater core sampling apparatus
US20060016621A1 (en) * 2004-06-09 2006-01-26 Placer Dome Technical Services Limited Method and system for deep sea drilling
US20090255728A1 (en) * 2008-04-14 2009-10-15 Tgh (Us), Inc. Wireline System
GB2470763A (en) * 2009-06-04 2010-12-08 Lance Stephen Davis Underwater drilling rig.
US20130223938A1 (en) * 2011-08-23 2013-08-29 Bauer Maschinen Gmbh Underwater work assembly and method for anchoring thereof
US8911180B2 (en) * 2011-08-23 2014-12-16 Bauer Maschinen Gmbh Underwater work assembly and method for anchoring thereof
US20130264117A1 (en) * 2012-04-10 2013-10-10 Vetco Gray Inc Drop away funnel for modular drilling templates
US8905156B2 (en) * 2012-04-10 2014-12-09 Vetco Gray Inc. Drop away funnel for modular drilling templates
US20150197989A1 (en) * 2014-01-16 2015-07-16 Conocophillips Company Underwater drilling rig assembly and method of operating the underwater drilling rig assembly
US9388649B2 (en) * 2014-04-30 2016-07-12 Fugro Engineers B.V. Offshore drilling installation and method for offshore drilling
US20150330164A1 (en) * 2014-05-16 2015-11-19 Gordon FEY Downhole tool support stand, combinations, and methods
US9617806B2 (en) * 2014-05-16 2017-04-11 Gordon FEY Downhole tool support stand, combinations, and methods
US9903172B2 (en) * 2014-11-18 2018-02-27 Aarbakke Innovation As Subsea slanted wellhead system and BOP system with dual injector head units
US20190283841A1 (en) * 2018-03-19 2019-09-19 Resolve Marine Group, Inc. Marine salvage drill assemblies and systems
US11014639B2 (en) * 2018-03-19 2021-05-25 Resolve Marine Group, Inc. Marine salvage drill assemblies and systems
US11364982B2 (en) * 2018-03-19 2022-06-21 Resolve Marine Group, Inc. Marine salvage drill assemblies and systems
US11708139B2 (en) 2018-03-19 2023-07-25 Resolve Marine Group, Inc. Marine salvage drill assemblies and systems
US20210178571A1 (en) * 2019-12-12 2021-06-17 C. & E. Fein Gmbh Magnetic base
US11332903B1 (en) * 2021-09-23 2022-05-17 Qingdao Institute Of Marine Geology Penetrating method of self-adjusting hydraulic static penetrating device suitable for seabed slope area

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FR1568803A (xx) 1969-05-30
NL6815899A (xx) 1969-05-09
DE1807611A1 (de) 1969-06-12

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AS Assignment

Owner name: ANCHOR SYSTEMS, 9 RUE, GEORGES PITARD,75015 PARIS,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TISSIER, JEAN-MICHEL;REEL/FRAME:003829/0548

Effective date: 19811027

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