Machine takes long horizontal stratum samples from confines of 21 cm bore hole. Stacked interlocking half cylindrical shells mate to form rigid thrust tube. Drive shaft and core storage device is flexible and retractable. Entire machine fits in 10 meter length of steel tube. Machine could drill drainage or ventilation holes in coal mines, or provide important information for geological, oil, and geothermal surveys.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Drilling side holes from a borehole


    Contributors:

    Published in:

    Publication date :

    1980-08-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Reliability of drilling pipe at borehole mouth

    Kucheryavyi, V. I. / Mil kov, S. N. | British Library Online Contents | 2005


    Drilling Holes in Graphite/Epoxy

    Minlionica, Ronald | NTRS | 1987




    FAILSAFE LOCATING DEVICE FOR DRILLING HOLES

    STAVIG JR PAUL NELSEN / ALBY AVERY C | European Patent Office | 2016

    Free access