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 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

Landscapes

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

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

Similar Documents

Publication Publication Date Title
NO151097C (en) UNDERWATER STORAGE DEVICE FOR STORAGE OF HIGHLY COOLED AND CONTINUOUS GASES
NL7404724A (en) Buoyancy element for use with under water drilling pipes - contains an easily liquefied vapour
US3107373A (en) Inlet control for escape appliance
GB933759A (en) Submarine escape apparatus
GB1429246A (en) Buoyancy body
GB1487027A (en) Raft having a stabilizing device
US3046925A (en) Apparatus for raising ships from underwater
US3070059A (en) Self-inflating pneumatic unit for naval salvage operations
FR2358313A1 (en) Structure with fully immersed hollow body - has upwards extending open tube to prevent collapse at working depth
ES483992A1 (en) Inflatable bladder and valve
US2938488A (en) Inflatable salvage device
EP0232215A3 (en) Inflatable structure with flexible membrane
US3863459A (en) Underwater heat sink
GB2014528A (en) Improvements in or relating to distress signalling devices
GB1260022A (en) A method of testing a membrane tank
FR2385562A1 (en) Buoyancy unit for vehicle - comprises envelopes inflated from air bottles and emerging from compartments when vehicle lands in water
GB1358116A (en) Life buoy
FR2343199A1 (en) Sealed vessel filling appts. - has jet medium drawn in at lower pressure downstream of jet inside pipe
GB1216733A (en) Improvements in life jackets
GB1059424A (en) Improvements in or relating to inflatable dinghies
FR2112760A5 (en) Self-inflating bandage - provides emergency spling and warmth for broken limbs
FR2346212A1 (en) Self-inflatable life-buoy for swimmers - is inflated by immersion to predetermined depth in water
ES197365U (en) Submersible jugueteria diver. (Machine-translation by Google Translate, not legally binding)
FR2267086A1 (en) Antiperspirant aerosol - contg. aluminium salt, water and/or alcohol and neutral propellant soluble in medium
FR2454034A1 (en) internal rubber or PVC valve plug for inflatable body - to permit closure without loss of air