NL7404724A - Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour - Google Patents

Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour

Info

Publication number
NL7404724A
NL7404724A NL7404724A NL7404724A NL7404724A NL 7404724 A NL7404724 A NL 7404724A NL 7404724 A NL7404724 A NL 7404724A NL 7404724 A NL7404724 A NL 7404724A NL 7404724 A NL7404724 A NL 7404724A
Authority
NL
Netherlands
Prior art keywords
buoyancy element
drilling pipes
under water
water drilling
easily liquefied
Prior art date
Application number
NL7404724A
Other languages
Dutch (nl)
Original Assignee
Wavin Bv
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 Wavin Bv filed Critical Wavin Bv
Priority to NL7404724A priority Critical patent/NL7404724A/en
Publication of NL7404724A publication Critical patent/NL7404724A/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/20—Accessories therefor, e.g. floats, weights
    • F16L1/24—Floats; Weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • B63C7/06—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which lifting action is generated in or adjacent to vessels or objects
    • B63C7/08—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which lifting action is generated in or adjacent to vessels or objects using rigid floats
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

Buoyancy element comprising a closed hollow body of glass-reinforced thermo-hardening resin, with >=1 hollow chambers, partic. for use with underwater drilling pipes e.g. to facilitate lifting these to the surface, in which the hollow chambers are free from gases which are not liquefiable at >30 atmos. at the normal temp. of use of the buoyancy element, and pref. contg. a gaseous medium liquefiable at 5 atmos (gauge). Elimination of the non-condensible gases, partic. air, removes the danger of bursting when the buoyancy element is brought to the surface after submersion at depths of e.g. 2 km where the high pressure causes water to enter by 'sweating' which can only escape slowly at the surface.
NL7404724A 1974-04-05 1974-04-05 Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour NL7404724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7404724A NL7404724A (en) 1974-04-05 1974-04-05 Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7404724A NL7404724A (en) 1974-04-05 1974-04-05 Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour

Publications (1)

Publication Number Publication Date
NL7404724A true NL7404724A (en) 1975-10-07

Family

ID=19821130

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7404724A NL7404724A (en) 1974-04-05 1974-04-05 Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour

Country Status (1)

Country Link
NL (1) NL7404724A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016610C2 (en) * 2000-11-15 2002-05-16 Lankhorst Recycling Bv Protection element for a riser segment.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016610C2 (en) * 2000-11-15 2002-05-16 Lankhorst Recycling Bv Protection element for a riser segment.
WO2002040821A1 (en) * 2000-11-15 2002-05-23 Lankhorst Recycling B.V. Protective element for a riser segment
US7210531B2 (en) 2000-11-15 2007-05-01 Lankhorst Recycling B.V. Protective element for a riser segment

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