BE429829A - - Google Patents

Info

Publication number
BE429829A
BE429829A BE429829DA BE429829A BE 429829 A BE429829 A BE 429829A BE 429829D A BE429829D A BE 429829DA BE 429829 A BE429829 A BE 429829A
Authority
BE
Belgium
Application number
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
Publication of BE429829A publication Critical patent/BE429829A/xx

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
    • E21B19/086—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 a fluid-actuated cylinder

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)
  • Earth Drilling (AREA)
BE429829D 1936-04-30 1938-08-22 BE429829A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US77153A US2132519A (en) 1936-04-30 1936-04-30 Feeding device
FR842285T 1938-08-18
BE429829T 1938-08-22

Publications (1)

Publication Number Publication Date
BE429829A true BE429829A (zh) 1938-09-30

Family

ID=22136375

Family Applications (1)

Application Number Title Priority Date Filing Date
BE429829D BE429829A (zh) 1936-04-30 1938-08-22

Country Status (3)

Country Link
US (1) US2132519A (zh)
BE (1) BE429829A (zh)
FR (1) FR842285A (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085638A (en) * 1953-10-23 1963-04-16 Atlas Copco Ab Rock drilling mechanisms
US3193055A (en) * 1962-01-16 1965-07-06 Lawrence J Morin Safety brake combination for pneumatic drills
US3149541A (en) * 1963-07-12 1964-09-22 K & H Equipment Ltd Hydraulically controlled air leg structure

Also Published As

Publication number Publication date
FR842285A (fr) 1939-06-08
US2132519A (en) 1938-10-11

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