RO54725A2 - - Google Patents

Info

Publication number
RO54725A2
RO54725A2 RO6504570A RO6504570A RO54725A2 RO 54725 A2 RO54725 A2 RO 54725A2 RO 6504570 A RO6504570 A RO 6504570A RO 6504570 A RO6504570 A RO 6504570A RO 54725 A2 RO54725 A2 RO 54725A2
Authority
RO
Romania
Application number
RO6504570A
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
Priority to RO6504570A priority Critical patent/RO54725A2/ro
Priority to DE19712157403 priority patent/DE2157403C3/de
Priority to FR7141520A priority patent/FR2115286A1/fr
Publication of RO54725A2 publication Critical patent/RO54725A2/ro

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10Valve arrangements in drilling-fluid circulation systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Float Valves (AREA)
  • Check Valves (AREA)
  • Lift Valve (AREA)
RO6504570A 1970-11-20 1970-11-20 RO54725A2 (ro)

Priority Applications (3)

Application Number Priority Date Filing Date Title
RO6504570A RO54725A2 (ro) 1970-11-20 1970-11-20
DE19712157403 DE2157403C3 (de) 1970-11-20 1971-11-19 Zementierrohrschuh
FR7141520A FR2115286A1 (en) 1970-11-20 1971-11-19 Cement-lining tube shoe - for casing boreholes with replaceable valve components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO6504570A RO54725A2 (ro) 1970-11-20 1970-11-20

Publications (1)

Publication Number Publication Date
RO54725A2 true RO54725A2 (ro) 1973-09-20

Family

ID=20088357

Family Applications (1)

Application Number Title Priority Date Filing Date
RO6504570A RO54725A2 (ro) 1970-11-20 1970-11-20

Country Status (3)

Country Link
DE (1) DE2157403C3 (ro)
FR (1) FR2115286A1 (ro)
RO (1) RO54725A2 (ro)

Also Published As

Publication number Publication date
DE2157403C3 (de) 1974-01-24
FR2115286B1 (ro) 1976-06-04
DE2157403B2 (de) 1973-06-28
FR2115286A1 (en) 1972-07-07
DE2157403A1 (de) 1972-07-06

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