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GB1376633A - Under water operating techniques - Google Patents

Under water operating techniques

Info

Publication number
GB1376633A
GB1376633A GB644372A GB644372A GB1376633A GB 1376633 A GB1376633 A GB 1376633A GB 644372 A GB644372 A GB 644372A GB 644372 A GB644372 A GB 644372A GB 1376633 A GB1376633 A GB 1376633A
Authority
GB
United Kingdom
Prior art keywords
tube
tank
air
actuated
cables
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.)
Expired
Application number
GB644372A
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.)
Total Compagnie Francaise des Petroles SA
TECHNIQUES LOUIS MENARD
Original Assignee
Compagnie Francaise des Petroles SA
TECHNIQUES LOUIS MENARD
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 Compagnie Francaise des Petroles SA, TECHNIQUES LOUIS MENARD filed Critical Compagnie Francaise des Petroles SA
Publication of GB1376633A publication Critical patent/GB1376633A/en
Expired legal-status Critical Current

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 or weights
    • F16L1/201—Anchor rods

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

1376633 Buoyancy control COMPAGNIE FRANCAISE DES PETROLES and TECHNIQUES LOUIS MENARD 11 Feb 1972 [8 March 1971] 6443/72 Heading B7M [Also in Division E1] A variable-buoyancy tank 11 for raising and lowering an underwater apparatus (see Division E1) comprises a cylinder 138 open at its lower end and having a valve-controlled inlet 61 for the admission of compressed air, and an outlet in the form of a movable tube 37. When the apparatus is at or near the surface of the water, the tank 11 will be substantially full of air and the tube 37 will be in a lowered position. To sink the apparatus a motor 140 is actuated to drive a cable 31 and raise the tube 37 allowing air to escape until the water level within the tank rises as far as the bottom of the tube 37; thus by selecting the position of the tube 37 the apparatus can be submerged to a specific depth. The precise position of the tube 37 in the tank is determined by means of a plurality of optical indicators at a remote point at the surface actuated by switches 44 located adjacent the tube 37 and triggered by a magnet secured to the bottom of the tube. To raise the apparatus the tube is lowered and a sensor 36 on contact with the water causes the valved inlet 61 to open until the water level again coincides with the bottom of the tube. The apparatus may be guided in its movements by engagement with a pair of cables 7, Fig. 13, attached at one end to securing means on the sea bed, and mounted on drums 74 in another open-bottomed tank 8, which is located on the sea bed whilst the securing means are being actuated by a diver. The tank 8 is then made buoyant by a quantity of air from a cylinder 9 and rises unwinding the cables 7. The tank 8 is preferably located at a certain depth below the surface. This depth is predetermined by a screw 14 operating a reducing valve to admit air at a pressure corresponding to the required depth to actuators 75. When the water pressure acting on these actuators 75 equals the preselected air pressure locking members 76 are actuated to grip cables 7.
GB644372A 1971-03-08 1972-02-11 Under water operating techniques Expired GB1376633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7107866A FR2128893A5 (en) 1971-03-08 1971-03-08

Publications (1)

Publication Number Publication Date
GB1376633A true GB1376633A (en) 1974-12-11

Family

ID=9073101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB644372A Expired GB1376633A (en) 1971-03-08 1972-02-11 Under water operating techniques

Country Status (8)

Country Link
US (1) US3765184A (en)
JP (1) JPS513121B1 (en)
CA (1) CA951922A (en)
DE (1) DE2152964A1 (en)
FR (1) FR2128893A5 (en)
GB (1) GB1376633A (en)
IT (1) IT946773B (en)
NL (1) NL7116698A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176153A (en) * 1985-06-10 1986-12-17 Nobuhiko Miyanagi Underwater ground working apparatus
GB2582767A (en) * 2019-04-01 2020-10-07 Subsea 7 Norway As Controlling movement of subsea pipelines

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841105A (en) * 1973-04-09 1974-10-15 G Cannon Method and apparatus for anchoring underwater pipelines
US4175269A (en) * 1974-05-15 1979-11-20 Dimetri Rebikoff Underwater TV surveillance of pipelines
NL7511638A (en) * 1975-10-03 1977-04-05 Johannes Franciscus Oosterkamp PROCEDURE FOR INSTALLING PIPELINES IN VERY LARGE WATER DEPTH, AND ARRANGEMENT FOR PERFORMING THIS PROCEDURE.
JPS52127321U (en) * 1976-03-25 1977-09-28
JPS52152127U (en) * 1976-05-14 1977-11-18
IT1072884B (en) * 1976-10-29 1985-04-13 Saipem Spa EQUIPMENT FOR THE SUPPORT OF SUSPENDED PIPES ON THE BOTTOMS OF THE SEA, PARTICULARLY SUITABLE FOR HIGH BOTTOMS, AND RELATED METHOD OF INSTALLATION
JPS53111933U (en) * 1977-02-15 1978-09-06
US4126191A (en) * 1977-06-03 1978-11-21 Raymond International Inc. Gas discharge type underwater hammer with liquid purge and reflood control
IT1166864B (en) * 1979-05-29 1987-05-06 Saipem Spa PERFECTED EQUIPMENT FOR THE SUPPORT OF PIPES SUSPENDED ON HILLS LOCATED EVEN AT GREAT DEPTHS OF THE SEA AND PERFECTED METHOD FOR THE INSTALLATION OF IT
US8395779B2 (en) * 2011-06-08 2013-03-12 The Boeing Company Laser surveillance system
ITMI20111779A1 (en) * 2011-09-30 2013-03-31 Saipem Spa METHOD AND SYSTEM TO FIX A PIPE ON THE BED OF A WATER BODY
CN115264409B (en) * 2022-07-27 2025-03-25 四川省地质工程勘察院集团有限公司 A method and device for early warning monitoring of underwater oil and gas pipeline disasters in a river
CN115534151B (en) * 2022-11-03 2023-08-22 浙江矽盛电子有限公司 Cutting device for manufacturing monocrystalline silicon rod for solar cell

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280782A (en) * 1965-05-24 1966-10-25 North American Aviation Inc Marine anchor
US3479830A (en) * 1967-04-20 1969-11-25 Global Divers & Contractors In Anchoring machine
US3517520A (en) * 1968-06-20 1970-06-30 Shell Oil Co Method of connecting underwater pipelines
US3568455A (en) * 1968-12-23 1971-03-09 Robert E Mclaughlin Method of laying pipe in or on a bed of particle material or in a trench

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176153A (en) * 1985-06-10 1986-12-17 Nobuhiko Miyanagi Underwater ground working apparatus
GB2582767A (en) * 2019-04-01 2020-10-07 Subsea 7 Norway As Controlling movement of subsea pipelines
GB2582767B (en) * 2019-04-01 2021-10-27 Subsea 7 Norway As Controlling movement of subsea pipelines

Also Published As

Publication number Publication date
JPS513121B1 (en) 1976-01-31
CA951922A (en) 1974-07-30
NL7116698A (en) 1972-09-12
IT946773B (en) 1973-05-21
FR2128893A5 (en) 1972-10-27
DE2152964A1 (en) 1972-09-14
US3765184A (en) 1973-10-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee