US20120128426A1 - Ice worthy jack-up drilling unit - Google Patents

Ice worthy jack-up drilling unit Download PDF

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Publication number
US20120128426A1
US20120128426A1 US13/277,791 US201113277791A US2012128426A1 US 20120128426 A1 US20120128426 A1 US 20120128426A1 US 201113277791 A US201113277791 A US 201113277791A US 2012128426 A1 US2012128426 A1 US 2012128426A1
Authority
US
United States
Prior art keywords
ice
hull
rig
water
drilling
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.)
Abandoned
Application number
US13/277,791
Other languages
English (en)
Inventor
Peter G. Noble
Randall S. Shafer
Dominique P. Berta
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.)
ConocoPhillips Co
Original Assignee
ConocoPhillips Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ConocoPhillips Co filed Critical ConocoPhillips Co
Priority to US13/277,791 priority Critical patent/US20120128426A1/en
Priority to CN201180050470.3A priority patent/CN103180514B/zh
Priority to US13/278,921 priority patent/US8851799B2/en
Priority to EP11782697.4A priority patent/EP2630305B1/en
Priority to US13/278,860 priority patent/US8801333B2/en
Priority to EP11779518.7A priority patent/EP2630304A1/en
Priority to SG2013022603A priority patent/SG189117A1/en
Priority to SG2013022348A priority patent/SG189102A1/en
Priority to US13/279,062 priority patent/US8956081B2/en
Priority to CA2811936A priority patent/CA2811936A1/en
Priority to US13/278,795 priority patent/US20120128428A1/en
Priority to SG2013025747A priority patent/SG189841A1/en
Priority to CN2011800504756A priority patent/CN103180515A/zh
Priority to PCT/US2011/057324 priority patent/WO2012054855A1/en
Priority to PCT/US2011/057228 priority patent/WO2012054808A1/en
Priority to PCT/US2011/057378 priority patent/WO2012054891A1/en
Priority to SG2013022330A priority patent/SG189101A1/en
Priority to US13/278,321 priority patent/US20120125690A1/en
Priority to CA2811943A priority patent/CA2811943A1/en
Priority to PCT/US2011/057353 priority patent/WO2012054875A1/en
Priority to US13/279,120 priority patent/US8807875B2/en
Priority to KR1020137009993A priority patent/KR20130139932A/ko
Priority to KR1020137009998A priority patent/KR20130120461A/ko
Priority to EP11775899.5A priority patent/EP2630300A1/en
Priority to RU2013123020/03A priority patent/RU2013123020A/ru
Priority to SG2013023106A priority patent/SG189142A1/en
Priority to CN2011800504582A priority patent/CN103168134A/zh
Priority to RU2013123024/13A priority patent/RU2573372C2/ru
Priority to EP11779042.8A priority patent/EP2630301A1/en
Priority to RU2013123031/03A priority patent/RU2013123031A/ru
Priority to CN2011800504385A priority patent/CN103168133A/zh
Priority to CA2812596A priority patent/CA2812596C/en
Priority to US13/278,404 priority patent/US20120125688A1/en
Priority to SG2013022322A priority patent/SG189100A1/en
Priority to PCT/US2011/057304 priority patent/WO2012054840A1/en
Priority to CA2810902A priority patent/CA2810902A1/en
Priority to KR1020137010002A priority patent/KR20130120463A/ko
Priority to PCT/US2011/057200 priority patent/WO2012054793A1/en
Priority to PCT/US2011/057212 priority patent/WO2012054801A1/en
Priority to RU2013123039/13A priority patent/RU2013123039A/ru
Priority to PCT/US2011/057331 priority patent/WO2012054858A1/en
Priority to SG2013021340A priority patent/SG189056A1/en
Priority to KR1020137010005A priority patent/KR20130120464A/ko
Priority to US13/279,084 priority patent/US20120128432A1/en
Priority to KR1020137010000A priority patent/KR20130120462A/ko
Priority to CA2813426A priority patent/CA2813426C/en
Priority to KR1020137010011A priority patent/KR20130120465A/ko
Priority to PCT/US2011/057363 priority patent/WO2012054881A1/en
Priority to CA2811938A priority patent/CA2811938C/en
Priority to CN201180050473.7A priority patent/CN103168136B/zh
Priority to CA2811946A priority patent/CA2811946C/en
Priority to CN201180050455.9A priority patent/CN103180513B/zh
Priority to RU2013123027/03A priority patent/RU2571782C2/ru
Priority to PCT/US2011/057366 priority patent/WO2012054883A1/en
Priority to EP11775895.3A priority patent/EP2630299A1/en
Priority to KR1020137009996A priority patent/KR20130120460A/ko
Priority to RU2013123049/03A priority patent/RU2564711C2/ru
Priority to EP11779048.5A priority patent/EP2630303B1/en
Priority to CN2011800504370A priority patent/CN103154379A/zh
Priority to EP11779047.7A priority patent/EP2630302A1/en
Priority to RU2013123047/03A priority patent/RU2583467C2/ru
Priority to CA2804900A priority patent/CA2804900A1/en
Priority to CA2812597A priority patent/CA2812597C/en
Priority to RU2013123006/03A priority patent/RU2013123006A/ru
Priority to US13/279,026 priority patent/US8870497B2/en
Priority to CA2804898A priority patent/CA2804898A1/en
Priority to CN201180050472.2A priority patent/CN103168135B/zh
Priority to RU2013123013/13A priority patent/RU2013123013A/ru
Priority to KR1020137009984A priority patent/KR20130139930A/ko
Priority to RU2013123040/13A priority patent/RU2573301C2/ru
Priority to US13/278,480 priority patent/US20120128427A1/en
Assigned to CONOCOPHILLIPS COMPANY reassignment CONOCOPHILLIPS COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERTA, DOMINQUE P., NOBLE, PETER G., SHAFER, RANDALL S.
Publication of US20120128426A1 publication Critical patent/US20120128426A1/en
Priority to SG2013022595A priority patent/SG189116A1/en
Priority to NO20130547A priority patent/NO20130547A1/no
Priority to NO20130549A priority patent/NO20130549A1/no
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • E02B17/0017—Means for protecting offshore constructions
    • E02B17/0021—Means for protecting offshore constructions against ice-loads
    • 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
    • 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
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/008—Drilling ice or a formation covered by ice
    • 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
    • B63B35/08—Ice-breakers or other vessels or floating structures for operation in ice-infested waters; Ice-breakers, or other vessels or floating structures having equipment specially adapted therefor
    • 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
    • E02B2017/0039—Methods for placing the offshore structure
    • 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/006—Platforms with supporting legs with lattice style supporting legs
    • 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0082—Spudcans, skirts or extended feet

Definitions

  • This invention relates to mobile offshore drilling units, often called “jack-up” drilling units or rigs that are used in shallow water, typically less than 400 feet, for drilling for hydrocarbons.
  • a jack-up or mobile offshore drilling unit can be used for about 45-90 days in the short, open-water summer season. Predicting when the drilling season starts and ends is a game of chance and many efforts are undertaken to determine when a jack-up may be safely towed to the drilling location and drilling may be started. Once started, there is considerable urgency to complete the well to avoid having to disconnect and retreat in the event of ice incursion. Even during the few weeks of open water, ice floes present a significant hazard to jack-up drilling rigs where the drilling rig is on location and legs of the jack-up drilling rig are exposed and quite vulnerable to damage.
  • Jack-up rigs are mobile, self-elevating, offshore drilling and workover platforms equipped with legs that are arranged to be lowered to the sea floor and then to lift the hull out of the water.
  • Jack-up rigs typically include the drilling and/or workover equipment, leg jacking system, crew quarters, loading and unloading facilities, storage areas for bulk and liquid materials, helicopter landing deck and other related facilities and equipment.
  • a jack-up rig is designed to be towed to the drilling site and jacked-up out of the water so that the wave action of the sea only impacts the legs which have a fairly small cross section and thus allows the wave action to pass by without imparting significant movement to the jack-up rig.
  • the legs of a jack-up provide little defense against ice floe collisions and an ice floe of any notable size is capable of causing structural damage to one or more legs and/or pushing the rig off location. If this type of event were to happen before the drilling operations were suspended and the well was suitably secured, a hydrocarbon leak would possibly occur. This type of risk is completely unacceptable in the oil and gas industry, to the regulators and to the public.
  • a very large, gravity based production system, or similar structure may be brought in and set on the sea floor for the long process of drilling and producing the hydrocarbons.
  • These gravity based structures are very large and very expensive, but are built to withstand the ice forces year around.
  • the invention more particularly relates to an ice worthy jack up rig for drilling for hydrocarbons in potential ice conditions in offshore areas including a flotation hull having a relatively flat deck at the upper portion thereof.
  • the flotation hull further includes an ice bending shape along the lower portion thereof and extending around the periphery of the hull where the ice bending shape extends from an area of the hull near the level of the deck and extends downwardly near the bottom of the hull along with an ice deflecting portion extending around the perimeter of the bottom of the hull to direct ice around the hull and not under the hull.
  • the rig includes at least three legs that are positioned within the perimeter of the bottom of the hull wherein the legs are arranged to be lifted up off the seafloor so that the rig may be towed through shallow water and also extend to the sea floor and extend further to lift the hull partially or fully out of the water.
  • a jack up device is associated with each leg to both lift the leg from the sea bottom so that the ice worthy jack up rig may float by the buoyancy of the hull and push the legs down to the seafloor and push the hull partially up and out of the water when ice floes threaten the rig and fully out of the water when ice is not present.
  • the invention further relates to a method for drilling wells in ice prone waters.
  • the method includes providing a flotation hull having a relatively flat deck at the upper portion thereof and an ice bending shape along the lower portion thereof where the ice bending shape extends from an area of the hull near the level of the deck and extends downwardly near the bottom of the hull and an ice deflecting portion extending around the perimeter of the bottom of the hull to direct ice around the hull and not under the hull.
  • At least three legs are positioned within the perimeter of the bottom of the hull.
  • Each leg is jacked down in a manner that feet on the bottom of the legs engages the sea floor and lifts the hull up and fully out of the water when ice is not threatening the rig while the rig is drilling a well on a drill site.
  • the hull is further lowered into the water into an ice defensive configuration so that the ice bending shape extends above and below the sea surface to bend ice that comes against the rig to cause the ice to submerge under the water and endure bending forces that break the ice where the ice flows past the rig.
  • FIG. 1 is an elevation view of a first embodiment of the present invention where the drilling rig is floating in the water and available to be towed to a well drilling site;
  • FIG. 2A is an elevation view of the first embodiment of the present invention where the drilling rig is jacked up out of the water for open water drilling through a moon pool;
  • FIG. 2B is an elevation view of the first embodiment of the present invention where the drilling rig is jacked up out of the water for conventional open water drilling with a cantilever derrick positioned to drill over the edge of the deck;
  • FIG. 3 is an elevation view of the first embodiment of the present invention where the drilling rig is partially lowered into the sea, but still supported by its legs, in a defensive configuration for drilling during potential ice conditions;
  • FIG. 4A is an enlarged fragmentary elevation view showing one end of the first embodiment of the present invention in the FIG. 3 configuration with ice moving against the rig;
  • FIG. 4B is an enlarged fragmentary view of a second embodiment of the hull configuration
  • FIG. 4C is an enlarged fragmentary view of a third embodiment of the hull configuration
  • FIG. 4D is an enlarged fragmentary view of a fourth embodiment of the hull configuration
  • FIG. 5A is a top view of the first embodiment of the present invention where a cantilever derrick is positioned to drill through a moon pool;
  • FIG. 5B is a top view of the first embodiment of the present invention where a cantilever derrick is positioned to drill over the edge of the deck;
  • FIG. 6 is a top view of a fifth embodiment of the present invention.
  • an ice worthy jack-up drilling rig is generally indicated by the arrow 10 .
  • jack-up drilling rig 10 is shown with its hull 20 floating in the sea and truss form legs 25 in a lifted arrangement where much of the length of the legs 25 extend above the deck 21 over the hull 20 .
  • the legs may have a triangular shape when viewed from above or a rectangular shape comprising long vertical posts at the corners and many cross members connected to the vertical posts to form a strong, relatively lightweight truss structure.
  • a derrick 30 which is used to drill wells in the conventional manner. Not shown is the conventional ancillary equipment for drilling wells on a drilling rig.
  • the jack-up rig 10 may be towed from one prospect field to another and to and from shore bases for maintenance and other shore service.
  • the legs 25 are lowered through the openings 27 in hull 20 until the feet 26 at the bottom ends of the legs 25 engage the seafloor 15 as shown in FIGS. 2A and 2B .
  • the feet 26 are connected to spud cans 28 to secure the rig 10 to the seafloor.
  • well drilling operations may commence in the ordinary course while there is no ice in the area.
  • the configuration in shown in FIG. 2A is for drilling when there is the potential for ice while drilling.
  • the configuration shown in FIG. 2B is for drilling when ice is not expected to be a threat during the drilling operation. For example, when drilling a first well in open water, ice will be less of a threat then when starting to drill a well late in the operational time window.
  • the ice-worthy jack-up drilling rig 10 is designed to resist ice floes by assuming an ice defensive, hull-in-water configuration as shown in FIG. 3 .
  • ice tends to dampen waves and rough seas, so the sea surface 12 appears less threatening, however, the hazards of the marine environment have only altered, and not lessened.
  • the ice-worthy jack-up rig 10 assumes its ice defensive, hull-in-water configuration, the hull 20 is lowered into the water to contact same, but not to the extent that the hull 20 would begin to float.
  • a significant portion of the weight of the rig 10 preferably remains on the legs 25 to hold the position of the rig 10 on the drill site against any pressure an ice floe might bring.
  • the rig 10 is lowered so that an inwardly sloped, ice-bending surface 41 bridges the sea surface 12 or extends from above the sea surface 12 down into the water below the sea surface 12 to engage any floating ice that may come upon the rig 10 .
  • the sloped ice-bending surface 41 runs from shoulder 42 , which is above the sea surface so therefore some considerable distance above the bottom of the hull 20 and near the perimeter of the deck 21 , down to neckline 44 .
  • the neckline 44 is very near the bottom of the hull or perhaps below the bottom of the hull and spaced inwardly from the shoulder 42 entirely around the perimeter of the hull 20 .
  • Ice deflector 45 extends downward from neckline 44 either straight down or at some small angle from vertical. If the ice deflector 45 is to be angled from the vertical, it is preferably angled outwardly.
  • an ice floe such as shown at 51 in FIG.
  • the ice-bending surface 41 causes the leading edge of the ice floe 51 to submerge under the sea surface 12 .
  • a significant bending force is applied by the weight of the rig 10 on the end of the ice floe against the ice-bending surface 41 , the flotation force of the water pressing up on the middle of the ice floe and the weight of the ice floe at the end away from the rig 10 .
  • Ice is less strong against bending then in pure compression such that the ice tends to break from large ice floes into smaller, less damaging, less hazardous bits of ice. For example, it is conceivable that an ice floe being hundreds of feet and maybe miles across could come toward the rig 10 . If the ice floe is broken into bits that are less than twenty feet in the longest dimension, and preferably smaller, such bits are able to pass around the rig 10 with much less concern.
  • the ice-bending surface slopes downwardly and inwardly from the shoulder 42 . It slopes upwardly and outwardly from neckline 44 .
  • FIG. 4B a first alternative shape of the hull is shown with a slightly off vertical)( ⁇ 10°) ice deflector 145 , wherein the ice bending shape 141 is slightly inset from the shoulder 142 and the area of the hull above shoulder 142 is also an outwardly and upwardly sloping surface.
  • FIG. 4C shows a second alternative embodiment having a convex shaped ice-bending surface 241 with an outward trending curved lip forming the ice deflector 245 for ice recoil.
  • FIG. 4D shows a third alternative embodiment having a concave shaped ice-bending surface 341 with an outwardly and downwardly curved ice deflector 345 .
  • the non-linear ice-bending surface 341 may be seen to provide greater bending force as ice slides further down along the ice-bending surface 341 .
  • the outwardly angled ice deflectors 245 and 345 are shaped to prevent any ice from slipping under the hull 20 .
  • Ice has substantial compressive strength being in the range of 4 to 12 MPa, but is much weaker against bending with typical flexure strength in the range of 0.3 to 0.5 MPa.
  • the force of the ice floe 51 moving along the sea surface 12 causes the leading edge to slide under the sea surface 12 and causes section 52 to break off.
  • the ice floe 51 broken into smaller pieces, such as section 52 and bit 53 the smaller sections tend to float past and around the rig 10 without applying the impacts or forces of a large floe.
  • the rig may be provided with an ice deflector 45 that is arranged to extend much further below the bottom of the hull 20 and downwardly at a steeper angle than ice-bending surface 41 and will increase the bending forces on the ice floe.
  • the neckline may or may not be at the bottom of the flotation portion of the hull 20 such that the ice deflector 45 may extend down from the flat of bottom of the hull 20 or may extend down to the flat of bottom of the hull 20 .
  • the deck 21 may optionally be set off and spaced above the hull 20 .
  • the feet 26 of the legs may be arranged to connect to cans 28 set in the sea floor so that when an ice floe comes against the ice-bending surface 41 , the legs 25 actually hold the hull 20 down and force the bending of the ice floe and resist the lifting force of the ice floe which, in an extreme case, may lift the near side of the rig 10 and push the rig over on its side by using the feet 26 on the opposite side of the rig 10 as the fulcrum or pivot.
  • the cans in the sea floor are known for other applications and the feet 26 would include appropriate connections to attach and release from the cans, as desired.
  • the ice-worthy jack-up drill rig 10 is designed to operate like a conventional jack-up rig in open water, but is also designed to settle to the water in an ice defensive position and then re-acquire the conventional stance or configuration when wave action becomes a concern. It is the shape of the hull 20 (as well as its strength) that provides ice bending and breaking capabilities.
  • the hull 20 (as viewed from above) may have a circular or oval configuration so as to present a shape that is conducive to steering the broken bits, pieces and sections of ice around the periphery of the rig 10 regardless of the orientation of the rig 10 or path of travel of the ice.
  • the ice tends to flow with the wind and sea currents, which tend not to be co-linear, or some path reflecting influences of both sea and air.
  • the hull 20 may have a faceted or multisided shape that provides the advantages of a circular or oval shape, and may be less expensive to construct.
  • the plates that make up the hull would likely be formed of flat sheets so that the entire structure comprises segments of flat material such as steel and is less complicated.
  • the ice-breaking surface 41 preferably extends at least about five meters above the water level or sea surface 12 , recognizing that sea levels shift up and down with tides and storms and perhaps other influences.
  • the height above the sea surface 12 accommodates ice floes that are quite thick or include ridges that extend well above the sea surface 12 .
  • tall ice floes are forced down as they come into contact with the rig 10 .
  • the deck 21 at the top of the hull 20 should be far enough above the water line so that waves are not able to wash across the deck 21 .
  • the deck 21 is preferred to be at least 7 to 8 meters above the sea surface 12 and potentially higher.
  • the neckline 42 is preferred to be at least 4 to 8 meters below the sea surface 12 to adequately bend the ice floes to break them up into more harmless pieces.
  • the hull 20 is preferably in the range of 5-16 meters in height from the flat of bottom to the deck 21 , more preferably 8-16 meters or 11-16 meters.
  • the legs 25 and the openings 27 through which they are connected to the hull 20 are within the perimeter of the ice deflector 45 so that the ice floes are less likely to contact the legs while the rig 10 is in its defensive ice condition configuration as shown in FIG. 3 and sometimes called hull-in-water configuration.
  • the rig 10 does not have to handle every ice floe threat to significantly add value to oil and gas companies. If an ice worthy drilling rig 10 can extend the drilling season by as little as a month, that could be a fifty percent increase in productivity in some ice prone areas and therefore provide a very real cost saving benefit to the industry. A fifty percent longer drilling window may allow the drilling of two or three wells rather than one or two wells per year substantially reducing costs and increasing the production of oil and gas.
  • the derrick 30 may be positioned to drill through a moon pool that is within the perimeter of the ice deflector 45 as shown in FIG. 5A or may be arranged to drill over the side of the deck 21 in a cantilevered fashion as shown in FIG. 5B .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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US13/277,791 2010-10-21 2011-10-20 Ice worthy jack-up drilling unit Abandoned US20120128426A1 (en)

Priority Applications (74)

Application Number Priority Date Filing Date Title
US13/277,791 US20120128426A1 (en) 2010-10-21 2011-10-20 Ice worthy jack-up drilling unit
CN201180050470.3A CN103180514B (zh) 2010-10-21 2011-10-21 带有气体搅动和桩腿冰块防护件的抗冰型自升式钻井单元
US13/278,921 US8851799B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
EP11782697.4A EP2630305B1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
US13/278,860 US8801333B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
EP11779518.7A EP2630304A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
SG2013022603A SG189117A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
SG2013022348A SG189102A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
US13/279,062 US8956081B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
CA2811936A CA2811936A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser
US13/278,795 US20120128428A1 (en) 2010-10-21 2011-10-21 Reinforced legs for ice worthy jack-up drilling unit
SG2013025747A SG189841A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
CN2011800504756A CN103180515A (zh) 2010-10-21 2011-10-21 带有预加载张紧系统的抗冰型自升式钻井单元
PCT/US2011/057324 WO2012054855A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
PCT/US2011/057228 WO2012054808A1 (en) 2010-10-21 2011-10-21 Leg ice shields for ice worthy jack-up drilling unit
PCT/US2011/057378 WO2012054891A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
SG2013022330A SG189101A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
US13/278,321 US20120125690A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser
CA2811943A CA2811943A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
PCT/US2011/057353 WO2012054875A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
US13/279,120 US8807875B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
KR1020137009993A KR20130139932A (ko) 2010-10-21 2011-10-21 해저에 고정된 얼음에 적합한 잭-업 굴착선
KR1020137009998A KR20130120461A (ko) 2010-10-21 2011-10-21 가스를 교반하여 얼음을 방지하는 얼음에 적합한 잭-업 굴착선
EP11775899.5A EP2630300A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
RU2013123020/03A RU2013123020A (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса, закрепленное на морском дне
SG2013023106A SG189142A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser
CN2011800504582A CN103168134A (zh) 2010-10-21 2011-10-21 固定到海底的抗冰型自升式钻井单元
RU2013123024/13A RU2573372C2 (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с газовым перемешиванием и ледовыми экранами опор
EP11779042.8A EP2630301A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
RU2013123031/03A RU2013123031A (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с буровой шахтой для бурения с защитой в ледовых условиях
CN2011800504385A CN103168133A (zh) 2010-10-21 2011-10-21 用于在冰中进行受保护钻探的带月池的抗冰型自升式钻井单元
CA2812596A CA2812596C (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
US13/278,404 US20120125688A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit secured to the seafloor
SG2013022322A SG189100A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
PCT/US2011/057304 WO2012054840A1 (en) 2010-10-21 2011-10-21 Reinforced legs for ice worthy jack-up drilling unit
CA2810902A CA2810902A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit secured to the seafloor
KR1020137010002A KR20130120463A (ko) 2010-10-21 2011-10-21 파일링된 원뿔형 모노포드 및 소켓을 구비한 얼음에 적합한 잭-업 굴착선
PCT/US2011/057200 WO2012054793A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser
PCT/US2011/057212 WO2012054801A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit secured to the seafloor
RU2013123039/13A RU2013123039A (ru) 2010-10-21 2011-10-21 Ледовые экраны опоры для самоподъемного бурового морского основания ледового класса
PCT/US2011/057331 WO2012054858A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
SG2013021340A SG189056A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit secured to the seafloor
KR1020137010005A KR20130120464A (ko) 2010-10-21 2011-10-21 파일링된 원뿔형 모노포드를 구비한 얼음에 적합한 잭-업 굴착선
US13/279,084 US20120128432A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
KR1020137010000A KR20130120462A (ko) 2010-10-21 2011-10-21 가스 교반 시스템 및 레그 얼음 차폐부를 구비한 얼음에 적합한 잭-업 굴착선
CA2813426A CA2813426C (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
KR1020137010011A KR20130120465A (ko) 2010-10-21 2011-10-21 텔레스코프식 라이저를 구비한 얼음에 적합한 잭-업 굴착선
PCT/US2011/057363 WO2012054881A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
CA2811938A CA2811938C (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
CN201180050473.7A CN103168136B (zh) 2010-10-21 2011-10-21 带有锥形打桩单脚架的抗冰型自升式钻井单元
CA2811946A CA2811946C (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
CN201180050455.9A CN103180513B (zh) 2010-10-21 2011-10-21 抗冰型自升式钻井单元和钻井方法
RU2013123027/03A RU2571782C2 (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с предотвращением обледенения газовым перемешиванием
PCT/US2011/057366 WO2012054883A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
EP11775895.3A EP2630299A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser
KR1020137009996A KR20130120460A (ko) 2010-10-21 2011-10-21 얼음에서 보호된 상태로 굴착하기 위한 문풀을 구비한 얼음에 적합한 잭-업 굴착선
RU2013123049/03A RU2564711C2 (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с одиночной конической опорой на свайном основании и установочными гнездами
EP11779048.5A EP2630303B1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
CN2011800504370A CN103154379A (zh) 2010-10-21 2011-10-21 带有伸缩式提升件的抗冰型自升式钻井单元
EP11779047.7A EP2630302A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
RU2013123047/03A RU2583467C2 (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с предварительным нагружением системой натяжения
CA2804900A CA2804900A1 (en) 2010-10-21 2011-10-21 Reinforced legs for ice worthy jack-up drilling unit
CA2812597A CA2812597C (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
RU2013123006/03A RU2013123006A (ru) 2010-10-21 2011-10-21 Усиленные опоры для самоподъемного бурового агрегата ледового класса
US13/279,026 US8870497B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
CA2804898A CA2804898A1 (en) 2010-10-21 2011-10-21 Leg ice shields for ice worthy jack-up drilling unit
CN201180050472.2A CN103168135B (zh) 2010-10-21 2011-10-21 带有气体搅动式冰块防护的抗冰型自升式钻井单元
RU2013123013/13A RU2013123013A (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с телескопическим райзером
KR1020137009984A KR20130139930A (ko) 2010-10-21 2011-10-21 예비 하중 인장 시스템을 갖는 얼음에 적합한 잭-업 굴착선
RU2013123040/13A RU2573301C2 (ru) 2010-10-21 2011-10-21 Самоподъемное буровое морское основание ледового класса с одиночной конической опорой на свайном основании
US13/278,480 US20120128427A1 (en) 2010-10-21 2011-10-21 Leg ice shields for ice worthy jack-up drilling unit
SG2013022595A SG189116A1 (en) 2010-10-21 2012-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
NO20130547A NO20130547A1 (no) 2010-10-21 2013-04-19 Isvern for bein pa istilpasset oppjekkbar boreenhet
NO20130549A NO20130549A1 (no) 2010-10-21 2013-04-19 Forsterkede bein for istilpasset oppjekkbar boreenhet

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US40549710P 2010-10-21 2010-10-21
PCT/US2011/057105 WO2012054728A1 (en) 2010-10-21 2011-10-20 Ice worthy jack-up drilling unit
US13/277,791 US20120128426A1 (en) 2010-10-21 2011-10-20 Ice worthy jack-up drilling unit

Related Parent Applications (1)

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US13/277,755 Continuation-In-Part US8821071B2 (en) 2010-10-21 2011-10-20 Conical piled monopod

Related Child Applications (10)

Application Number Title Priority Date Filing Date
US13/279,120 Continuation-In-Part US8807875B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod and sockets
US13/278,404 Continuation-In-Part US20120125688A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit secured to the seafloor
US13/278,795 Continuation-In-Part US20120128428A1 (en) 2010-10-21 2011-10-21 Reinforced legs for ice worthy jack-up drilling unit
US13/278,860 Continuation-In-Part US8801333B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitation and leg ice shields
US13/278,480 Continuation-In-Part US20120128427A1 (en) 2010-10-21 2011-10-21 Leg ice shields for ice worthy jack-up drilling unit
US13/279,062 Continuation-In-Part US8956081B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with gas agitated ice prevention
US13/279,084 Continuation-In-Part US20120128432A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with moon pool for protected drilling in ice
US13/278,921 Continuation-In-Part US8851799B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with pre-loading tension system
US13/279,026 Continuation-In-Part US8870497B2 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with conical piled monopod
US13/278,321 Continuation-In-Part US20120125690A1 (en) 2010-10-21 2011-10-21 Ice worthy jack-up drilling unit with telescoping riser

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KR (1) KR20130139931A (ru)
CN (1) CN103168137B (ru)
CA (1) CA2810901A1 (ru)
RU (1) RU2013123037A (ru)
SG (1) SG189054A1 (ru)
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SG189054A1 (en) 2013-05-31
CN103168137B (zh) 2016-06-08
KR20130139931A (ko) 2013-12-23
CA2810901A1 (en) 2012-04-26
WO2012054728A1 (en) 2012-04-26
RU2013123037A (ru) 2014-11-27

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