FR2420089A1 - Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods - Google Patents

Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods

Info

Publication number
FR2420089A1
FR2420089A1 FR7807596A FR7807596A FR2420089A1 FR 2420089 A1 FR2420089 A1 FR 2420089A1 FR 7807596 A FR7807596 A FR 7807596A FR 7807596 A FR7807596 A FR 7807596A FR 2420089 A1 FR2420089 A1 FR 2420089A1
Authority
FR
France
Prior art keywords
lance
concrete
metal
thermally
rods
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.)
Granted
Application number
FR7807596A
Other languages
French (fr)
Other versions
FR2420089B1 (en
Inventor
Christian Tourneur
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.)
Freyssinet International STUP SA
Original Assignee
Freyssinet International STUP SA
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 Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Priority to FR7807596A priority Critical patent/FR2420089A1/en
Publication of FR2420089A1 publication Critical patent/FR2420089A1/en
Application granted granted Critical
Publication of FR2420089B1 publication Critical patent/FR2420089B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/14—Drilling by use of heat, e.g. flame drilling
    • E21B7/146—Thermal lances

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A thermal lance comprises a tubular metal structure of ferrous metal, the structure comprising a plurality of ferrous rods wound around an axial channel permitting the passage therethrough of a combustible gas. The rods are in contact with each other at adjacent surfaces. The lance can bore deep holes in concrete, rocks and metals without breaking the bored structure. The lance is superior to conventional thin and thick walled tubes.
FR7807596A 1978-03-16 1978-03-16 Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods Granted FR2420089A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7807596A FR2420089A1 (en) 1978-03-16 1978-03-16 Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7807596A FR2420089A1 (en) 1978-03-16 1978-03-16 Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods

Publications (2)

Publication Number Publication Date
FR2420089A1 true FR2420089A1 (en) 1979-10-12
FR2420089B1 FR2420089B1 (en) 1982-03-26

Family

ID=9205873

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7807596A Granted FR2420089A1 (en) 1978-03-16 1978-03-16 Lance for thermally boring rock, concrete, or metal - comprises helically wound ferrous rods

Country Status (1)

Country Link
FR (1) FR2420089A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2035666A5 (en) * 1969-02-21 1970-12-18 Fassler Edwin
BE854976A (en) * 1977-02-04 1977-11-24 Brower Jerome S ELECTRODE FOR UNDERWATER OXYCUTTING TORCH

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2035666A5 (en) * 1969-02-21 1970-12-18 Fassler Edwin
BE854976A (en) * 1977-02-04 1977-11-24 Brower Jerome S ELECTRODE FOR UNDERWATER OXYCUTTING TORCH

Also Published As

Publication number Publication date
FR2420089B1 (en) 1982-03-26

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Legal Events

Date Code Title Description
ST Notification of lapse