GB1446959A - Device for salvaging a metal object - Google Patents

Device for salvaging a metal object

Info

Publication number
GB1446959A
GB1446959A GB2639474A GB2639474A GB1446959A GB 1446959 A GB1446959 A GB 1446959A GB 2639474 A GB2639474 A GB 2639474A GB 2639474 A GB2639474 A GB 2639474A GB 1446959 A GB1446959 A GB 1446959A
Authority
GB
United Kingdom
Prior art keywords
thermit
housing
powder
ignition
flux
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
GB2639474A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1446959A publication Critical patent/GB1446959A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B63C7/16—Apparatus engaging vessels or objects

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Water Treatment By Sorption (AREA)
  • Arc Welding In General (AREA)

Abstract

1446959 Raising submerged metal objects L M ANDERSEN 14 June 1974 [20 June 1973] 26394/74 Heading B7S [Also in Division B3] Metal objects 8 are salvaged from water by a submersible housing 10 containing compressed thermit 14 enveloped by flux 16 and topped by ignition powder 18 which does not emit gas upon ignition, there being an ignition device 20 for igniting the powder 18 and thermit so as to weld the housing to the object which is raised by lifting means 28, 30 connected to the housing. The powder 18 may also be thermit but compressed to a lesser degree, a cap 22 being pressed into the housing 10 and a steel liner 17 separating the thermit 14 from the compressed flux 16 which may be high cellulose welding rod coating or submersed arc welding flux. A copper ring 40 directs the molten mixture on to the object 8, burning off adhesive bonding a can 36 to a flange 13 on the magnetized housing 10. To prevent escape of oil from a tanker being salvaged the entire device may be covered with a magnetic can having a foam seal. In a modification, Fig. 3, two explosive charges are included, one 52 for removing barnacles &c. 60 and the other 54 with a slightly detonation for forcing the device to make a shallow depression in the object 8 before the thermit charge is ignited. A wood or plastics block 50 is placed between the charge 54 and the ignition powder 18. Attachment lugs may be provided for a hauling line.
GB2639474A 1973-06-20 1974-06-14 Device for salvaging a metal object Expired GB1446959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US371875A US3871315A (en) 1973-06-20 1973-06-20 Device for salvaging metal objects and salvaging method

Publications (1)

Publication Number Publication Date
GB1446959A true GB1446959A (en) 1976-08-18

Family

ID=23465762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2639474A Expired GB1446959A (en) 1973-06-20 1974-06-14 Device for salvaging a metal object

Country Status (6)

Country Link
US (1) US3871315A (en)
JP (1) JPS5744516B2 (en)
DE (1) DE2429384A1 (en)
FR (1) FR2234184B1 (en)
GB (1) GB1446959A (en)
NO (1) NO137144C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062485A (en) * 1977-01-06 1977-12-13 Andersen Leonard M Exothermic welding device
US4552298A (en) * 1983-04-29 1985-11-12 The United States Of America As Represented By The Secretary Of The Navy Apparatus for attaching an underwater explosive pad eye
FI77589C (en) * 1985-01-09 1989-04-10 Gss General Sea Safety Ltd Oy UNDERVATTENSFOERGRIPNINGSFOERFARANDE OCH -MEDEL.
GB2480869B (en) 2010-06-04 2017-01-11 Bisn Tec Ltd Method and apparatus for use in well abandonment
GB201223055D0 (en) 2012-12-20 2013-02-06 Carragher Paul Method and apparatus for use in well abandonment
GB201406071D0 (en) 2014-04-04 2014-05-21 Bisn Tec Ltd Well Casing / Tubing Disposal
GB201414565D0 (en) 2014-08-15 2014-10-01 Bisn Oil Tools Ltd Methods and apparatus for use in oil and gas well completion
GB2551693B (en) 2016-05-24 2021-09-15 Bisn Tec Ltd Down-hole chemical heater and methods of operating such
GB2562208B (en) 2017-04-04 2021-04-07 Bisn Tec Ltd Improvements relating to thermally deformable annular packers
GB2568519B (en) 2017-11-17 2022-09-28 Bisn Tec Ltd An expandable eutectic alloy based downhole tool and methods of deploying such
CN109367734B (en) * 2018-08-28 2020-10-23 潘阿海 A protection fishing device for corpse salvages in well

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1168061A (en) * 1915-09-08 1916-01-11 Goldschmidt Thermit Company Method of producing aluminothermic mixtures.
US2154654A (en) * 1938-02-02 1939-04-18 Armentrout Apparatus for recovering objects from wells
US2253364A (en) * 1940-07-27 1941-08-19 Metal & Thermit Corp Ignition of thermit mixtures
US2374134A (en) * 1943-09-22 1945-04-17 Lance D Richard Grapple to raise sunken ships or the like
DE857756C (en) * 1950-05-09 1952-12-01 Ludwig Nitterl Device for welding and burning under water, especially underwater rescue device
US2717204A (en) * 1952-05-02 1955-09-06 Du Pont Blasting initiator composition
US2789004A (en) * 1954-03-17 1957-04-16 Henry C Foster Metal fishing tool
US3243218A (en) * 1964-04-24 1966-03-29 Thelma E Jennings Magnetic junk retrieving tool
US3421570A (en) * 1967-02-20 1969-01-14 Elektro Thermit Gmbh Aluminothermic welding process
US3711019A (en) * 1970-02-05 1973-01-16 R Ralph Welding and brazing devices

Also Published As

Publication number Publication date
NO137144B (en) 1977-10-03
US3871315A (en) 1975-03-18
NO742215L (en) 1975-01-13
FR2234184A1 (en) 1975-01-17
JPS5744516B2 (en) 1982-09-21
NO137144C (en) 1978-01-11
DE2429384A1 (en) 1975-01-23
FR2234184B1 (en) 1978-01-13
JPS5031600A (en) 1975-03-28

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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