Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
  • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
• • 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
• • 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
  • E21B19/004—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 supporting a riser from a drilling or production 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
  • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
  • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations

Definitions

• the invention relates to a particular support of a number of parallel pipelines/hoses/cables etc. extending between a surface vessel, e.g. a production ship, and a point on the seabed.
• the point on the seabed will normally be located by or immediately proximate to a wellhead pertaining to an oil or gas well.
• the pipelines/hoses in question are high pressure lines and hoses.
• electric cables In such a pipe bundle are comprised hydraulic and electric direction/control lines, cables for electric signals etc. Lines of this kind are used during oil production, gas production, water injection etc.
• the surface vessel the production ship, may lie moored above the wellhead or close to the imaginary upward vertical projection of the wellhead, or it may be kept in a relatively stable position by means of so-called dynamic positioning.
• Such a surface vessel will be con- figured with a vertical through recess for lowering said pipe bundle or for receiving tubing for oil/gas carried, at a relatively low pressure, from the wellhead up to the production ship.
• Such low pressure tubing may suitably be distributed around the circumference of the high pressure pipelines etc. first mentioned, so that a suitably compact collection of pipelines/hoses/cables is achieved, in which the former parallel high pressure pipelines, hoses and cables for the transfer of hydraulics, electric effect and electronic signals are located centrally, while the low pressure tubings are located peripherally.
• Aboard the surface vessel the low pressure pipelines have a swivel device arranged thereto, which represents a relatively complex and very expensive device.
• the object of the present invention has been to avoid the use of a swivel device for said parallel high pressure pipelines etc., especially since swivel devices for high pressure pipe lines are very expensive and complex.
• FIG. 1 shows a small-scale situation side view of a pipe bundle supported in accordance with the invention, the production ship being shown in partial view;
• Fig. 2 shows, on a larger scale, the upper portion of the centrally located pipe bundle and its support, the peripherally arranged low pressure tubings, and the surrounding structure of the ship in the area of its vertically through recess, shown in side-view/vertical sectional view;
• Fig. 3 shows, on an even larger scale, a perspective view of the central pipe bundle, cut, in the area of the known swivel device of the low pressure tubings.
• a surface vessel in the form of a production ship 10, which is only shown in part in Fig. 1, has, in a known manner, a recess 12 extending vertically therethrough, which in the shown example of an embodiment accommodates a pivotal cylindrical device 14 with vertical axis of rotation and a vertical through cylindrical bore 16, through which a number of pipelines, hoses, cables etc. pass.
• the low pressure pipelines 18a - 18d are comprised by tubings which carry oil/gas from the seabed 20. These low pressure tubings 18a - 18d are supported via a swivel device 22, in a conventional manner, on the upper surface of the pivotal cylindrical device 14, known in itself, which has an axis of rotation A.
• High pressure pipelines, cables, hoses etc. are bundled, according to the invention, to form a pipe bundle generally defined by the reference numeral 28.
• the pipe bundle 28 may consist of any suitable bundling, a multi-channel pipeline, also of the kind configured to receive and accommodate individual pipelines, cables etc., indicated by 26a - 26c at the top of Fig. 2, an umbilical structure or in another manner which serves the purpose, the main thing being to achieve formation of a highly elongated pipe bundle 28, which is able to resist and absorb torsional stresses produced by the turning about its longitudinal axis.
• the pipe bundle 28 is placed centrally in relation to the peripherally positioned low pressure tubings 18a - 18d.
• the pipe bundle 28 is fixedly supported by its upper and lower end to respectively the surface vessel 10 via a portal-shaped structural part 30 and at the seabed 20 by 28'.
• the latter fixation will normally be in connection with a wellhead, for example via the blow-out preventer (not shown) thereof.
• the production ship 10 may be moored above the fixed securing point 28' of the pipe bundle 28 with a certain positional deviation in relation thereto, or the ship
• the pipe bundle 28 When the ship 10 performs rotational movements at the surface, the pipe bundle 28 will absorb, because of its support in the form of firm attachment at both ends, the movements of the ship through torsion.
• the ship may for example turn round twice in the same direction, whereby the pipe bundle 28 is twisted correspondingly about its longitudinal axis.
• the pipe bundle 28 will have such a great length in the well services to be performed, that it easily resists the resulting torsional stresses.

Landscapes

• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Fluid Mechanics (AREA)
• Environmental & Geological Engineering (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Geochemistry & Mineralogy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Ocean & Marine Engineering (AREA)
• Earth Drilling (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)
• Geophysics And Detection Of Objects (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19900376

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (3)

• 1997
  • 1997-02-13 NO NO970657A patent/NO970657L/no unknown
• 1998
  • 1998-02-09 WO PCT/NO1998/000045 patent/WO1998036153A1/no active Application Filing
  • 1998-02-09 AU AU61247/98A patent/AU6124798A/en not_active Abandoned

Patent Citations (3)

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