JPS521681B2 - - Google Patents

Info

Publication number
JPS521681B2
JPS521681B2 JP10273472A JP10273472A JPS521681B2 JP S521681 B2 JPS521681 B2 JP S521681B2 JP 10273472 A JP10273472 A JP 10273472A JP 10273472 A JP10273472 A JP 10273472A JP S521681 B2 JPS521681 B2 JP S521681B2
Authority
JP
Japan
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
JP10273472A
Other languages
Japanese (ja)
Other versions
JPS4959702A (cs
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 JP10273472A priority Critical patent/JPS521681B2/ja
Priority to GB4779273A priority patent/GB1452751A/en
Priority to GB1794876A priority patent/GB1452752A/en
Priority to SE7313975A priority patent/SE407255B/xx
Priority to AT875573A priority patent/AT327845B/de
Priority to DE2351742A priority patent/DE2351742C3/de
Priority to CA183,405A priority patent/CA982114A/en
Priority to US406482A priority patent/US3894590A/en
Priority to NO733983A priority patent/NO142228C/no
Priority to NL7314158.A priority patent/NL159164B/xx
Priority to FR7336837A priority patent/FR2203016B1/fr
Priority to AU61444/73A priority patent/AU468564B2/en
Publication of JPS4959702A publication Critical patent/JPS4959702A/ja
Priority to CA230,002A priority patent/CA998383A/en
Publication of JPS521681B2 publication Critical patent/JPS521681B2/ja
Priority to SE7707003A priority patent/SE424757B/xx
Expired legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP10273472A 1972-10-16 1972-10-16 Expired JPS521681B2 (cs)

Priority Applications (14)

Application Number Priority Date Filing Date Title
JP10273472A JPS521681B2 (cs) 1972-10-16 1972-10-16
GB4779273A GB1452751A (en) 1972-10-16 1973-10-12 Drilling system and method of pulling it up
GB1794876A GB1452752A (en) 1972-10-16 1973-10-12 Method of pulling-up the cutting head of drilling apparatus
US406482A US3894590A (en) 1972-10-16 1973-10-15 Drilling system
AT875573A AT327845B (de) 1972-10-16 1973-10-15 Bohrvorrichtung
DE2351742A DE2351742C3 (de) 1972-10-16 1973-10-15 Durch einen Rohrstrang absenkbare Bohreinrichtung und Fangvorrichtung dafür
CA183,405A CA982114A (en) 1972-10-16 1973-10-15 Drilling system and method of pulling it up
SE7313975A SE407255B (sv) 1972-10-16 1973-10-15 Borrsystem
NO733983A NO142228C (no) 1972-10-16 1973-10-15 Boreinnretning og fremgangsmaate til aa trekke opp innretningens skjaereorganer
NL7314158.A NL159164B (nl) 1972-10-16 1973-10-15 Boorsysteem met een boorpijp en een hierdoorheen verplaatsbaar, en in het ondereinde losneembaar vergrendelbaar boorbeitelsamenstel met een inwendige spoelvloeistofdoorvoer.
FR7336837A FR2203016B1 (cs) 1972-10-16 1973-10-16
AU61444/73A AU468564B2 (en) 1972-10-16 1973-10-16 Drilling system and method of pulling it up
CA230,002A CA998383A (en) 1972-10-16 1975-06-24 Drilling system and method of pulling it up
SE7707003A SE424757B (sv) 1972-10-16 1977-06-16 Sett att draga ut en borrkrona ur ett borrhal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10273472A JPS521681B2 (cs) 1972-10-16 1972-10-16

Publications (2)

Publication Number Publication Date
JPS4959702A JPS4959702A (cs) 1974-06-10
JPS521681B2 true JPS521681B2 (cs) 1977-01-17

Family

ID=14335462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10273472A Expired JPS521681B2 (cs) 1972-10-16 1972-10-16

Country Status (1)

Country Link
JP (1) JPS521681B2 (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278393A (ja) * 1985-09-30 1987-04-10 国土防災技術株式会社 多段式拡孔ビツト

Also Published As

Publication number Publication date
JPS4959702A (cs) 1974-06-10

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