EP0202310A1 - A method for establishing a connection from the sea bed to a tunnel positioned below - Google Patents

A method for establishing a connection from the sea bed to a tunnel positioned below

Info

Publication number
EP0202310A1
EP0202310A1 EP85906091A EP85906091A EP0202310A1 EP 0202310 A1 EP0202310 A1 EP 0202310A1 EP 85906091 A EP85906091 A EP 85906091A EP 85906091 A EP85906091 A EP 85906091A EP 0202310 A1 EP0202310 A1 EP 0202310A1
Authority
EP
European Patent Office
Prior art keywords
drilling
tunnel
sea bed
template
vessel
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Withdrawn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
EP85906091A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bjorn Halmrast
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.)
AMR ENGINEERING AS
Ingenior F Selmer AS
Original Assignee
AMR ENGINEERING AS
Ingenior F Selmer AS
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 AMR ENGINEERING AS, Ingenior F Selmer AS filed Critical AMR ENGINEERING AS
Publication of EP0202310A1 publication Critical patent/EP0202310A1/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Withdrawn legal-status Critical Current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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
    • E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/08—Underwater guide bases, e.g. drilling templates; Levelling thereof
    • 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
    • E21B7/04—Directional drilling
    • E21B7/043—Directional drilling for underwater installations
    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention relates to a method for estab ⁇ lishing a connection from the sea bed to a tunnel which is provided in advance by blasting or drilling. Such tunnel connections are necessary in so called ocean
  • thermical energy plants producing energy by utilizing the temperature difference between the surface water and water on great depth.
  • the diameter of the pipeline is insignificant in relation to the diameter of the tunnel.
  • the object of this invention is to provide a safe method of establishing a connection of the kind stated introductory, said connection having a flow cross, section, in hydraulic respect substantially correspon ⁇ ding to the cross section of the tunnel.
  • the purpose of this invention is obtained by drilling from the sea
  • bed surface a plurality of drilling holes ending in the tunnel and having a total flow cross section which in hydrodynamic respect is corresponding at least to the cross section of the tunnel.
  • the tunnel is filled with water before establish ⁇ ing the through-flow-connection.
  • the drilling operation is carried out preferably from a floating or semi- submergeable drilling vessel or the like and drilling templates are used to line.
  • method according to the invention is applicable for vertical drilling as well as for inclined drilling.
  • the invention solves the problems in a simple and safe manner in the previously known flow communication establishing methods. Instead of carrying out the
  • Fig. 1 is illustrating diagramatically a vertical
  • fig. 2 is illustrating inclined drilling
  • fig. 3 is illustrating mounting of the drilling line for a inclined drilling operation
  • fig. 4 is showing diagramatically a drilling template
  • Fig. 1 shows a vertical cross section formation 3 . 00073
  • a cold water tunnel for an ocean thermal energy plant.
  • an energy plant e.g. of 5 MW, it can be suitable to provide a tunnel for receiving cold water
  • the number of drilling holes 8 is determined by the necessary cross section. A cave for rock drilled out and blasting rock rest if any, is shown at 9. The normal maximum diameter in crude oil industry is at the present
  • the hole length will depend on the geometry of the rock surface (sea bed) and the geography of the tunnel.
  • Fig. 2 is illustrating an alternative method.
  • the drill holes 8 are drilled obliquely in order to obtain better flowing conditions at the inlet to the tunnel 3
  • the drilling template 6 is provided with a guide funnel 10 which is pivotably journaled at 11.
  • the drilling string is extending along an arcuade path from the drilling vessel 5 to the guide funnel 10
  • the template can be made with as many guides as necessary for drilling holes in the sea bed, however, it can also be provided
  • the guide funnel 10 may also be arranged for rotary movement so that ar..
  • Fig. 3 illustrates a method for adapting the drilling string for inclined drilling.
  • the drilling template 6 is provided with a guide funnel 10 for accomodating the lowermost portion of the drilling string (see also fig.
  • Fig. 4 shows diagramatically a drilling template
  • frame 6 shaped as a sledge (sled) for moving across a sea bed and provided with a pivotable guide funnel 10 as also shown in fig. 2.

Landscapes

  • 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)
  • Earth Drilling (AREA)
  • Building Environments (AREA)
EP85906091A 1984-11-28 1985-11-27 A method for establishing a connection from the sea bed to a tunnel positioned below Withdrawn EP0202310A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO844729 1984-11-28
NO844729A NO844729L (no) 1984-11-28 1984-11-28 Fremgangsmaate for aa etablere en forbindelse fra havbunnen til en underliggnede tunnel.

Publications (1)

Publication Number Publication Date
EP0202310A1 true EP0202310A1 (en) 1986-11-26

Family

ID=19887963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85906091A Withdrawn EP0202310A1 (en) 1984-11-28 1985-11-27 A method for establishing a connection from the sea bed to a tunnel positioned below

Country Status (5)

Country Link
EP (1) EP0202310A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU5194086A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CU (1) CU21793A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO844729L (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO1986003253A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO139063C (no) * 1976-02-13 1978-12-27 Norske Stats Oljeselskap Fremgangsmaate og roerkonstruksjon for aa etablere en forbindelse mellom en fralandsroerledning og en tunnel under havbunnen
CA1051676A (en) * 1977-08-25 1979-04-03 John A. Owen Tunnel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8603253A1 *

Also Published As

Publication number Publication date
AU5194086A (en) 1986-06-18
WO1986003253A1 (en) 1986-06-05
NO844729L (no) 1986-05-29
CU21793A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-10-01

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Legal Events

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Effective date: 19861029

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Inventor name: HALMRAST, BJORN