FR689771A - Improvements to survey facilities - Google Patents

Improvements to survey facilities

Info

Publication number
FR689771A
FR689771A FR689771DA FR689771A FR 689771 A FR689771 A FR 689771A FR 689771D A FR689771D A FR 689771DA FR 689771 A FR689771 A FR 689771A
Authority
FR
France
Prior art keywords
survey
facilities
survey facilities
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
Other languages
French (fr)
Inventor
Walter Anson Loomis
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 filed Critical
Application granted granted Critical
Publication of FR689771A publication Critical patent/FR689771A/en
Expired 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
FR689771D 1930-01-15 1930-01-15 Improvements to survey facilities Expired FR689771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR689771T 1930-01-15

Publications (1)

Publication Number Publication Date
FR689771A true FR689771A (en) 1930-09-11

Family

ID=9027452

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689771D Expired FR689771A (en) 1930-01-15 1930-01-15 Improvements to survey facilities

Country Status (1)

Country Link
FR (1) FR689771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990001665A1 (en) * 1988-08-12 1990-02-22 Stahlwerke Peine-Salzgitter Ag Process and device for cleaning conveying channels

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990001665A1 (en) * 1988-08-12 1990-02-22 Stahlwerke Peine-Salzgitter Ag Process and device for cleaning conveying channels
US5014965A (en) * 1988-08-12 1991-05-14 Stahlwerke Peine-Salzgitter Ag Process and apparatus to clean a molten metal or slag conveyor trough

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