GB2341626A - Method and apparatus for drilling subsea wells - Google Patents

Method and apparatus for drilling subsea wells

Info

Publication number
GB2341626A
GB2341626A GB9927815A GB9927815A GB2341626A GB 2341626 A GB2341626 A GB 2341626A GB 9927815 A GB9927815 A GB 9927815A GB 9927815 A GB9927815 A GB 9927815A GB 2341626 A GB2341626 A GB 2341626A
Authority
GB
United Kingdom
Prior art keywords
wellhead
floating
riser
casing
rig
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.)
Withdrawn
Application number
GB9927815A
Other versions
GB9927815D0 (en
Inventor
Pierre Morvan
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.)
SEDCO FOREX INTERNATIONAL Inc
Original Assignee
SEDCO FOREX INTERNATIONAL Inc
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 SEDCO FOREX INTERNATIONAL Inc filed Critical SEDCO FOREX INTERNATIONAL Inc
Publication of GB9927815D0 publication Critical patent/GB9927815D0/en
Publication of GB2341626A publication Critical patent/GB2341626A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E21B17/012—Risers with buoyancy elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/12—Underwater drilling
    • E21B7/128—Underwater drilling from floating support with independent underwater anchored guide base

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Described is a marine drilling system and method using an upwardly extended casing string (27) to connect a mudline wellhead (26) and a floating wellhead (28). Both wellheads are capable of supporting the weight of subsequently installed casing strings. A blow-out-preventer (24 is connected to the floating wellhead. The extended part of the casing string is kept under tension by a controlled buoyancy module (29). A simplified shortened conventional riser connects the BOP to a floating rig. To stabilize the system, the rig (22) can be bound to the riser (23) and the casing extension by a series of angled guys (281). The system is particularly useful for deep water drilling as it reduces the length of the riser significantly.
GB9927815A 1997-06-17 1998-06-17 Method and apparatus for drilling subsea wells Withdrawn GB2341626A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9712537.1A GB9712537D0 (en) 1997-06-17 1997-06-17 Method and apparatus for drilling subsea wells
PCT/EP1998/003730 WO1998058152A1 (en) 1997-06-17 1998-06-17 Method and apparatus for drilling subsea wells

Publications (2)

Publication Number Publication Date
GB9927815D0 GB9927815D0 (en) 2000-01-26
GB2341626A true GB2341626A (en) 2000-03-22

Family

ID=10814259

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9712537.1A Pending GB9712537D0 (en) 1997-06-17 1997-06-17 Method and apparatus for drilling subsea wells
GB9927815A Withdrawn GB2341626A (en) 1997-06-17 1998-06-17 Method and apparatus for drilling subsea wells

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9712537.1A Pending GB9712537D0 (en) 1997-06-17 1997-06-17 Method and apparatus for drilling subsea wells

Country Status (4)

Country Link
AU (1) AU8627698A (en)
GB (2) GB9712537D0 (en)
NO (1) NO996255L (en)
WO (1) WO1998058152A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2358032B (en) * 2000-01-05 2002-03-27 Sedco Forex Internat Inc Method and apparatus for drillig subsea wells
WO2002088516A1 (en) * 2001-04-30 2002-11-07 Shell Internationale Research Maatschappij B.V. Subsea drilling riser disconnect system and method
NO333539B1 (en) * 2004-03-16 2013-07-08 Ocean Riser Systems As System and method for switching between ordinary drilling and high pressure operations
US7658228B2 (en) 2005-03-15 2010-02-09 Ocean Riser System High pressure system
US8459361B2 (en) 2007-04-11 2013-06-11 Halliburton Energy Services, Inc. Multipart sliding joint for floating rig
NO330829B1 (en) * 2007-06-22 2011-07-25 Subsea Dev Services As A system and method for alternating between ordinary drilling and high pressure operations
NO327464B1 (en) * 2007-11-09 2009-07-06 Fmc Kongsberg Subsea As Stigerorsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512783A (en) * 1946-05-04 1950-06-27 Augustine J Tucker Marine drilling
US3330339A (en) * 1964-10-05 1967-07-11 Shell Oil Co Method of removing a wellhead assembly from the ocean floor
US4047579A (en) * 1975-09-27 1977-09-13 Rheinstahl Ag Sea drilling jig
WO1997018380A1 (en) * 1995-11-13 1997-05-22 Japan Drilling Co., Ltd. Riser that is to be detached near the water surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512783A (en) * 1946-05-04 1950-06-27 Augustine J Tucker Marine drilling
US3330339A (en) * 1964-10-05 1967-07-11 Shell Oil Co Method of removing a wellhead assembly from the ocean floor
US4047579A (en) * 1975-09-27 1977-09-13 Rheinstahl Ag Sea drilling jig
WO1997018380A1 (en) * 1995-11-13 1997-05-22 Japan Drilling Co., Ltd. Riser that is to be detached near the water surface

Also Published As

Publication number Publication date
GB9927815D0 (en) 2000-01-26
NO996255L (en) 2000-02-10
WO1998058152A1 (en) 1998-12-23
AU8627698A (en) 1999-01-04
NO996255D0 (en) 1999-12-16
GB9712537D0 (en) 1997-08-20

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)