US3294051A - Apparatus for drilling in deep water - Google Patents

Apparatus for drilling in deep water Download PDF

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Publication number
US3294051A
US3294051A US414716A US41471664A US3294051A US 3294051 A US3294051 A US 3294051A US 414716 A US414716 A US 414716A US 41471664 A US41471664 A US 41471664A US 3294051 A US3294051 A US 3294051A
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US
United States
Prior art keywords
platform
columns
shell
drilling
water
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Expired - Lifetime
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US414716A
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English (en)
Inventor
Khelstovsky Leonide
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.)
CIE GENERALE D EQUIPEMENTS POU
GENERALE D'EQUIPEMENTS POUR LES TRAVAUX MARITIMES Cie
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CIE GENERALE D EQUIPEMENTS POU
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/14—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration
    • B63B2001/145—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration having means for actively varying hull shape or configuration

Definitions

  • This invention relates generally to deep-water drilling and, more particularly, it relates to an improved apparatus for carrying out drilling operations in deep water (i.e. greater than 60 meters).
  • utilization is made either of structures fixed by construction, or of floating, possibly self-elevating platforms, which move by oating to the utilization site.
  • These latter devices such as that described in U.S.A. Patent No. 2,837,897 or in U.S.A. Patent No. 3,601,370, are utilizable to depths of up to 60 metres at maximum.
  • the shell suppolting the platform is filled with water and immersed until it rests on the bottom.
  • the platform can then be raised along columns fixed to the shell, until it is at a suitable distance from the sea surface.
  • the present invention has for an object the provision of an improved device or apparatus for drilling in deep water comprising a sealed shell which is always immersed, above which there is disposed a platform sliding along vertical columns fixed to the shell.
  • This platform is partially immersed, that is to say effects the dotation of the appliance during its transport, but is capable of being fixed on the columns at any desired height.
  • the platform when the device is situated at the drilling site, the platform is raised along the floating stabilizing columns until it has emerged completely and is situated at a suitable distance from the water surface, the shell and 'the columns always remaining in flotation.
  • the apparatus of the present invention permits use of columns of relatively short height.
  • the sum of the cross-sections of ICC the various stabilizing columns must be at least equal to 6% and preferably close to 8 or 10% of the flotation area of the platform.
  • FGURE 1 is a front elevation of the device in its position for navigation
  • FIGURE 2 is a view similar to FGURE 1, the device .being in its position for utilization in deep water,
  • FIGURE 3 is a side View of the device in its utilization position
  • FIGURE 4 is a detailed view of a variant of FIG- URE 3.
  • the device comprises essentially a sealed shell l@ upon which there are fixed eight vertical floating stabilizing columns i1 constituting slideways for a platform i2.
  • the sealed shell iti can be constituted, as represented in the drawings, by two cylindrical caissons itin and 10b connected to one another by two or more strong tubes lttc.
  • This sealed shell is arranged in such manner as to contain the major part of the effective load, namely: the drilling water, drinking water, the fuels, muds and cement, that is to say about to 90% of the useful load.
  • the load to be foreseen on the platform is minimised, permitting operation as an unassisted independent unit, and of reducing the size of the platform.
  • ttl will advantageously be partitioned into compartments 1S containing the liquid materials or tiuids necessary for the drilling.
  • the upper part there there will be disposed the electric pumps f6 permitting the raising of the liquid materials to the platform by means of pipes (not shown) placed in the columns il.
  • the compartments when emptied, will generally be lled with sea water in order to keep the total weight of the appliance substantially constant.
  • a series of wateregates 16a (FIG. 3) are provided for the admission of sea water into these compartments.
  • the pumps f6 and water gates fea will be accessible through the columns 11 but controlled automatically from the platform.
  • Water ballast 17 for compensating for the weight of these solid materials can also be provided inside the shell and will preferably be disposed in its central part.
  • the platform l2 through which there pass the columns il serving as slideways for the platform, is supported either directly on these columns by means of jacks, for example of the hydraulic type, or preferably upon the shell it) through the intermediary lof shafts 13 of suitable dimensions situated outside the columns 11 and also sliding through the platform :l2 and supporting it by means of jacks lili.
  • Lifting means for example the jacks 1d, also effect the displacement of the platform along the columns 1l.
  • the internal space of the columns 11 communicate with the interior of the shell 1t).
  • Lifts D and load hoists will be provided in one of the columns, permitting access to shell and lifting of the solid materials to the level of the platform.
  • the tubes and reserve pipes can also be housed in these columns.
  • the raising of the platform 12 along the columns 11 is effected for example by means of jacks 14 or with the aid of the other elements provided for this purpose.
  • the decrease of water displacement of the platform causes the progressive depression of the shell 10.
  • the platform has arrived at its upper position, at the end of the columns 11, it is locked by appropriate means (not shown) wedges or stop-blocks preventing all subsequent descent.
  • the platform is then completely emerged from the water, its rise above the water level having been compensated by a corresponding immersion of the columns.
  • the water ballast 17 situated immediately above the compartments containing the liquid charge have a very small volume and are essentially intended for the following operations. They permit especially of compensating on the one hand the loss of weight of the assembly due to the consumption of the solid materials (cement, earth, tubes, head tubing, etc.) in the course of drilling and on the other hand the downward thrust in the course of the extraction of the tubing. It should however be noted that as asymmetric arrangement of this water ballast 17 should be provided if the drilling tower 20 is placed, as represented in the drawings, at one of the ends of the platform. More generally, this water ballast 17 permits compensating for any normal or accidental variation in the apparent weight of the assembly and in particular that which will be caused by the utilization of the swell compensators which will be discussed hereinafter.
  • the device further comprises mobile counter weights 22 permitting of displacing the centre of gravity of the assembly at will.
  • the size and the depth placing of these counter weights will be established in each particular case as a function of the relative transverse narrowness of the assembly, of its total capacity and of certain working terms and conditions.
  • the metallic counterweights 22 will be constituted by solid plates affixed at the lower end of the metallic shafts 13 already mentioned, which will then be mounted for sliding in the submersible shell 10 and controlled in relation to the said shell by any appropriate means, such for example as the jacks 14 themselves.
  • the counterweights 22 will be placed fiat against and beneath the submersible shell 10.
  • the jacks 14 will be actuated to sink the counterweights 22 to the desired depth.
  • stopblocks 13 will be fixed on these columns at a suitable level. They will come to bear upon the top of the submersible shell 10, preventing the columns 13 from sinking further. If' in this position the operation of the jacks 14 is continued, these will ,thn cause the depression of the shell 10 and of the columns 11 and the corresponding raising of the platform 12, as already mentioned.
  • swell-compensating devices which comprise on the one hand regulable immersion elements permitting essentially of varying the oatation area and on the other hand regulable counterweights.
  • the floating devices of the kind which have just been described are in fact calculated so as to be situated in equilibrium for a swell of specific period. If the period of the swell varies, the balance which depends mainly upon the flotation area is no longer satisfactory and more or less significant vertical oscillations can occur.
  • These variations of the period of the swell can be due, in general cases, either to the phenomenon of wave trains, or to a seasonal variation, or finally to variations of the atmospheric conditions. The same is obviously the case if a device designed for specific conditions is utilized in other regions characterised by the swell of different period.
  • the device thus comprises swell compensators constituted lby a plurality of hollow cylinders 21 sliding in the platform 12 and actuated by means of Winches or jacks (not shown). In the normal postion these cylinders emerge above the platform 12, their lower face being situated at the level of the lower face of the platform. When there are variations of the period of the swell, the necessary number of compensating cylinders 21 is sunk in order to modify the flotation area. In general it is sufficient to have an immerison equal to half the amplitude of the maximum swell (position represented in dotted lines in FIGURE 3). Moreover, talking account of the fact that generally four cylinders are necessary in order to satisfy symmetry, a total of 411 is necessary in order than n stages of compensation may be utilized.
  • the swell compensators 21 permit of reducing the total of the vertical ⁇ Jscillations at the centre of the craft below 0.15 or 0.10 metre under normal conditions, It should however be noted that in the case where the tower 20 is placed at the end or on the side, the compensators 21 will advantageously be used in asymmetric fashion in order to compensate the depression on any extraction of the pipes. Finally these compensators 21 permit of correcting the deviations of flotation in comparison with theoretical calculations, at the time of utilization.
  • each counterweight can be constituted by a bundle of chains the utilization length of which is equal t-o the lmaximum amplitude of the vertical oscillation of the apices of the plaform.
  • the damping device will thus be discontinuous and composed of a plurality of metallic plates 24 connected with one another by connecting rods 25 so that in the open position the total height of the assembly is equal to the amplitude of the oscillation and in the collapsed position it is as little as possible in view of the thickness o f the plates.
  • the assembly will be suspended on cables 26 operated with the aid of the Winches 23.
  • connecting rods could be replaced by telescopic elements possibly comprising elastic devices.
  • Such adjustable countenweights of one or the other of the above-described types will be very effective for avoiding roll and pitching caused by the wind or by the subsidiary effect of the harmonics of the swell or by secondary interference swell.
  • the pitch will be of the order of 1% and the roll of the order of 3%, if the form of the platform is quite elongated.
  • adjustable counterweights also permit improving stability in the course of extraction of the tubing. More generally it can be said that an assembly of the compensator devices, adjustable-depth cylinders and adjustable counterweights provides the platform with a vertical stability never yet achieved for such appliances.
  • the device according to the invention will of course be equipped with anchoring elements such as those which are utilized on appliances of the same kind.
  • the device can comprise submerged motors 27 with propellers mounted on cylindrical columns 28 sliding through the platform 12 and bearing upon the submersible shell 10.
  • the columns 28 or the motors 27 themselves will be orientable in such manner as to ⁇ permit of directing the thrusts of the propellers in the suitable directions.
  • the various control elements will, of course, be arranged on the platform 12.
  • the floating device can comprise propulsion motors rendering it completely autonom-ous.
  • Electric motors will preferably be disposed in the shell and will be supplied from generator sets mounted on the platform, it ybeing possible moreover for these sets to be the same as those utilized for drilling.
  • shell is always submerged, has an approximately constant weight, and maintains the center of 'gravity of the device very low, thus necessitating a buoyancy for the shell of close to zero.
  • platform 12 since the platform 12 effects fiotation of the device during transport, it must have a ⁇ positive buoyancy.
  • columns 11 must have a high buoyancy, since it is manifest that they must overcome the lack of buoyancy in the shell 10 and also support platform 12 when it is out of the water; this is why the columns should have a relatively large cross-sectional area.
  • a permanently floating device for deep-water drilling comprising:
  • a platform having a plurality of vertical openings for passage of said columns, said platform having a positive buoyancy, the buoyancy of said columns being sufficient to support said platform;
  • each of said counterweights comprises a plurality of vertically stacked flexibly connected elements connected to said platform by flexible means, the lowermost of said elements being adapted to rest on the bottom when said platform is stable.
  • said sealed shell has a plurality ⁇ of internal compartments, and additionally comprising means for moving material from said compartments to said platform through said columns, and means for lling said compartments with Water.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Combustion & Propulsion (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Earth Drilling (AREA)
US414716A 1963-11-29 1964-11-30 Apparatus for drilling in deep water Expired - Lifetime US3294051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR955438A FR1384832A (fr) 1963-11-29 1963-11-29 Dispositif flottant pour les forages en eau profonde

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US3294051A true US3294051A (en) 1966-12-27

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US (1) US3294051A (da)
BE (1) BE656361A (da)
DE (1) DE1431276C3 (da)
DK (1) DK113351B (da)
FR (1) FR1384832A (da)
GB (1) GB1074199A (da)
NL (1) NL6413750A (da)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442239A (en) * 1968-03-28 1969-05-06 Wilson John H Submergible stabilizer for barges
US3474749A (en) * 1965-08-10 1969-10-28 Vickers Ltd Floatable vessel
US3490406A (en) * 1968-08-23 1970-01-20 Offshore Co Stabilized column platform
US3499409A (en) * 1967-04-10 1970-03-10 Internavia Ab Ship,in particular for the transportation of containers
US3507239A (en) * 1967-09-01 1970-04-21 Ingbureau Marcon Nv Semisubmersible floating sea platform
US3590765A (en) * 1968-03-13 1971-07-06 Tecnico Inc Modular hull vessel and method of operation
US3672177A (en) * 1970-06-24 1972-06-27 Mobil Oil Corp Subsea foundation unit and method of installation
US3707934A (en) * 1971-01-14 1973-01-02 Interstate Oil Transport Co Floating stable terminal
US3837309A (en) * 1971-06-17 1974-09-24 Offshore Technology Corp Stably buoyed floating offshore device
JPS516952B1 (da) * 1969-10-29 1976-03-03
US3946684A (en) * 1971-01-18 1976-03-30 Sumner Maurice N Semi-submersible jackup apparatus
USRE29167E (en) * 1968-09-04 1977-04-05 Santa Fe International Corporation Twin hull variable draft drilling vessel
US4102147A (en) * 1975-10-13 1978-07-25 Hollandsche Beton Groep Nv Submersible positioning and guiding apparatus for pile driving
FR2446794A1 (fr) * 1979-01-22 1980-08-14 Iceberg Transport Int Engin de levage evoluant en mer profonde
US4421438A (en) * 1981-02-17 1983-12-20 Chevron Research Company Sliding leg tower
US4422806A (en) * 1981-02-17 1983-12-27 Chevron Research Company Sliding tension leg tower
US4431344A (en) * 1981-06-19 1984-02-14 Chevron Research Company Sliding leg tower with pile base
US4556008A (en) * 1981-06-22 1985-12-03 Adragem Limited Semi-submersible marine platform
US4627767A (en) * 1983-07-22 1986-12-09 Santa Fe International Corporation Mobile sea barge and platform
US4666341A (en) * 1983-07-22 1987-05-19 Santa Fe International Corporation Mobile sea barge and plateform
US4723875A (en) * 1987-02-13 1988-02-09 Sutton John R Deep water support assembly for a jack-up type platform
US4913591A (en) * 1988-10-17 1990-04-03 Bethlehem Steel Corporation Mobile marine platform and method of installation
WO1991013799A1 (fr) * 1988-09-05 1991-09-19 Jacques Louis Julien Lefebvre Porte-barges et conteneurs montes sur des elements submersibles porteurs et propulseurs
WO1996017767A1 (en) * 1994-12-09 1996-06-13 Jenan Kazim Marine stabilising system
US6241425B1 (en) 1996-06-11 2001-06-05 Jenan Kazim Tethered marine stabilizing system
US6257165B1 (en) * 1999-12-20 2001-07-10 Allen Danos, Jr. Vessel with movable deck and method
US6539888B1 (en) * 1998-12-23 2003-04-01 Buitendijk Holding B.V. Working ship
US6869252B1 (en) * 1999-12-28 2005-03-22 Zentech, Inc. Taut mooring system for jack-up type mobile offshore platforms
US20070039533A1 (en) * 2005-08-22 2007-02-22 Lockheed Martin Corporation Apparatus for Reconfiguration of a Variable-Draft Vessel
SG134996A1 (en) * 2003-10-08 2007-09-28 Deepwater Technology Group Pte Extended semi-submersible vessel
US20080237175A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Extension assemblies and methods thereof
US20080243365A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Methods of holding station and mooring and elevating support vessel
US20080237171A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Methods of positioning an elevating support vessel
US20080237170A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Extension Bridges and methods of tender assist
US20080237173A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Arm assembly and methods of passing a pipe from a first vessel to a second vessel using the arm assembly
US20080247827A1 (en) * 2007-03-30 2008-10-09 Remedial (Cyprus) Pcl Work-over rig assembly and methods thereof
US20100067989A1 (en) * 2007-03-30 2010-03-18 Brown Michael D Vessel for transporting wind turbines and methods thereof
US20120128430A1 (en) * 2010-10-21 2012-05-24 Conocophillips Company Ice worthy jack-up drilling unit with pre-loading tension system
US20140205383A1 (en) * 2013-01-21 2014-07-24 Conocophillips Company Jack-up drilling unit with tension legs
US9487944B2 (en) * 2014-12-22 2016-11-08 Muhammad Amzad Ali Jack-up conical structure
US20180230662A1 (en) * 2017-02-13 2018-08-16 Saudi Arabian Oil Company Self-installing offshore platform
US10400414B2 (en) * 2015-04-22 2019-09-03 Ihc Iqip Uk Ltd Method of installing a pile by means of a pile guide
US11685486B2 (en) 2021-01-14 2023-06-27 Saudi Arabian Oil Company Resilient bumper and bumper system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576520A (en) * 1983-02-07 1986-03-18 Chevron Research Company Motion damping apparatus
NL1009043C2 (nl) * 1998-04-29 1999-11-01 Huisman Spec Lifting Equip Bv Gedeeltelijk afzinkbaar vaartuig.
DE10021163B4 (de) * 2000-04-29 2006-03-02 Aerodyn Engineering Gmbh Wasserfahrzeug zum Versorgen einer Offshore-Windenergieanlage
DE102006022237B3 (de) * 2006-05-12 2007-11-08 Thomas Neuf Anlage, auf der ein Aufbau angeordnet ist, wobei die Anlage in einem Gewässer angeordet ist
DE102010026711A1 (de) * 2010-03-30 2011-10-06 Werner Möbius Engineering GmbH Halbtaucher zum Transport und/oder Ausführen von Arbeiten auf See sowie Verfahren zur Positionierung offshore
WO2020037999A1 (zh) * 2018-08-18 2020-02-27 孙怡然 多体船

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US2399656A (en) * 1944-12-07 1946-05-07 Edward R Armstrong Float
US2399611A (en) * 1942-05-14 1946-05-07 Edward R Armstrong Submersible seadrome
USRE24346E (en) * 1957-08-20 dawson
US2972973A (en) * 1958-05-06 1961-02-28 Ernest L Thearle Offshore platform
US3154039A (en) * 1962-07-25 1964-10-27 Jersey Prod Res Co Stable floating foundation
US3183676A (en) * 1960-10-20 1965-05-18 Robert G Letourneau Mobile sea platform

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
USRE24346E (en) * 1957-08-20 dawson
US2399611A (en) * 1942-05-14 1946-05-07 Edward R Armstrong Submersible seadrome
US2399656A (en) * 1944-12-07 1946-05-07 Edward R Armstrong Float
US2972973A (en) * 1958-05-06 1961-02-28 Ernest L Thearle Offshore platform
US3183676A (en) * 1960-10-20 1965-05-18 Robert G Letourneau Mobile sea platform
US3154039A (en) * 1962-07-25 1964-10-27 Jersey Prod Res Co Stable floating foundation

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474749A (en) * 1965-08-10 1969-10-28 Vickers Ltd Floatable vessel
US3499409A (en) * 1967-04-10 1970-03-10 Internavia Ab Ship,in particular for the transportation of containers
US3507239A (en) * 1967-09-01 1970-04-21 Ingbureau Marcon Nv Semisubmersible floating sea platform
US3590765A (en) * 1968-03-13 1971-07-06 Tecnico Inc Modular hull vessel and method of operation
US3442239A (en) * 1968-03-28 1969-05-06 Wilson John H Submergible stabilizer for barges
US3490406A (en) * 1968-08-23 1970-01-20 Offshore Co Stabilized column platform
USRE29167E (en) * 1968-09-04 1977-04-05 Santa Fe International Corporation Twin hull variable draft drilling vessel
JPS516952B1 (da) * 1969-10-29 1976-03-03
US3672177A (en) * 1970-06-24 1972-06-27 Mobil Oil Corp Subsea foundation unit and method of installation
US3707934A (en) * 1971-01-14 1973-01-02 Interstate Oil Transport Co Floating stable terminal
US3946684A (en) * 1971-01-18 1976-03-30 Sumner Maurice N Semi-submersible jackup apparatus
US3837309A (en) * 1971-06-17 1974-09-24 Offshore Technology Corp Stably buoyed floating offshore device
US4102147A (en) * 1975-10-13 1978-07-25 Hollandsche Beton Groep Nv Submersible positioning and guiding apparatus for pile driving
FR2446794A1 (fr) * 1979-01-22 1980-08-14 Iceberg Transport Int Engin de levage evoluant en mer profonde
US4421438A (en) * 1981-02-17 1983-12-20 Chevron Research Company Sliding leg tower
US4422806A (en) * 1981-02-17 1983-12-27 Chevron Research Company Sliding tension leg tower
US4431344A (en) * 1981-06-19 1984-02-14 Chevron Research Company Sliding leg tower with pile base
US4556008A (en) * 1981-06-22 1985-12-03 Adragem Limited Semi-submersible marine platform
US4666341A (en) * 1983-07-22 1987-05-19 Santa Fe International Corporation Mobile sea barge and plateform
US4627767A (en) * 1983-07-22 1986-12-09 Santa Fe International Corporation Mobile sea barge and platform
US4723875A (en) * 1987-02-13 1988-02-09 Sutton John R Deep water support assembly for a jack-up type platform
WO1991013799A1 (fr) * 1988-09-05 1991-09-19 Jacques Louis Julien Lefebvre Porte-barges et conteneurs montes sur des elements submersibles porteurs et propulseurs
US4913591A (en) * 1988-10-17 1990-04-03 Bethlehem Steel Corporation Mobile marine platform and method of installation
WO1996017767A1 (en) * 1994-12-09 1996-06-13 Jenan Kazim Marine stabilising system
US5980159A (en) * 1994-12-09 1999-11-09 Kazim; Jenan Marine stabilising system and method
US6241425B1 (en) 1996-06-11 2001-06-05 Jenan Kazim Tethered marine stabilizing system
US6539888B1 (en) * 1998-12-23 2003-04-01 Buitendijk Holding B.V. Working ship
US6257165B1 (en) * 1999-12-20 2001-07-10 Allen Danos, Jr. Vessel with movable deck and method
US6869252B1 (en) * 1999-12-28 2005-03-22 Zentech, Inc. Taut mooring system for jack-up type mobile offshore platforms
SG134996A1 (en) * 2003-10-08 2007-09-28 Deepwater Technology Group Pte Extended semi-submersible vessel
US20070039533A1 (en) * 2005-08-22 2007-02-22 Lockheed Martin Corporation Apparatus for Reconfiguration of a Variable-Draft Vessel
US7293516B2 (en) * 2005-08-22 2007-11-13 Lockheed Martin Corporation Apparatus for reconfiguration of a variable-draft vessel
WO2008152512A2 (en) * 2007-03-30 2008-12-18 Remedial (Cyprus) Pcl Track-mounted crane support
US20100067989A1 (en) * 2007-03-30 2010-03-18 Brown Michael D Vessel for transporting wind turbines and methods thereof
US20080240863A1 (en) * 2007-03-30 2008-10-02 Remdial (Cyprus) Pcl Elevating support vessel and methods thereof
US20080237171A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Methods of positioning an elevating support vessel
US20080237170A1 (en) * 2007-03-30 2008-10-02 Remedial (Cyprus) Pcl Extension Bridges and methods of tender assist
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Also Published As

Publication number Publication date
DE1431276C3 (de) 1974-09-26
NL6413750A (da) 1965-05-31
DK113351B (da) 1969-03-17
GB1074199A (en) 1967-06-28
DE1431276B2 (de) 1974-02-21
FR1384832A (fr) 1965-01-08
BE656361A (da) 1965-03-16
DE1431276A1 (de) 1969-06-26

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