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  • Borehole drilling and related activities at the Stripa mine
    Even after using the XF 60/90 drill and the single tube core barrel with a B-type core bit ( 127 mm O.D., 116 mm I.D.) to drill the remain- ing heater boreholes, drilling proceeded at a slow rate.
  • The China Continental Scientific Drilling Project
    …improve rotary table drive core drilling technique, hydro-hammer was used for this drilling tool assembly: 157 mm diamond core drill bit , 139.7 mm double tube core drilling tool (with 157 mm … and lower reaming shells), 127 mm hydro-hammer, 156…
  • CONCRETE BRIDGE PROTECTION AND REHABILITATION: CHEMICAL AND PHYSICAL TECHNIQUES. CORROSION INHIBITORS AND POLYMERS
    To evaluate the:concrete material, 4 in (102 mm ) diameter cores were drilled with a water- cooled diamond drill bit . .... The cores were approximately 5 in ( 127 mm) long.
  • Underwater Soil Sampling and Testing—A State-of-the-Art Review
    The pipe is suspended just above the sea floor and a sonar transducer lowered into the 5-in. ( 127 - mm ) drill pipe. .... The transducer head, which sticks 6 in. (152 ram) out of the core bit , makes a 360-deg sweep.
  • Sealing the joints of the Andizhan concrete dam
    The ZIF-300 and NKR-IOOM rigs reequipped for rotary drilling with the use of 127 - mm and 151- mm-diameter Pobeditalloy bits were used for this purpose. .... In all, 239 intersections of the joint were obtained, from which 30 monolithic cores (13%) were extracted.
  • Micromechanisms of Borehole Failure In Reservoir Rocks
    Drilling experiments are conducted on rectangular prismatic rock samples (typically 127 × 127 × 178 mm3). .... The typical drilling bit used is a diamond-impregnated coring bit that creates a 22 mm (in dia.) central borehole along the largest sample dimension, although tests have also been con- ducted using bi-cone bits as well as other borehole diameters…
  • Engineering report for simulated riser installation
    A series of 6- mm (1/4-in.) holes were drilled into the pipe to provide water flow into the core barrel. .... cooling water in the sealed inner casing is enough to cool the small bit and dilute the .... The hole should be drilled at least 127 mm (5 in.) into sound concrete.
  • Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik
    127 . .... m [Bermudainseln] biscuit cutter [A short (6-8 inches or 15 - 20 cm) core barrel that is … Spanischweiß bismuth telluride [inorganic chemistry] [Gray, hexag- onal platelets with a melting point of 573 C; used for semiconductors, thermoelectric cooling, and power gener- ation applications] ● Tellurwismut m, Bi2Te3 bismuth trioxid(e) ● Wismuttrioxyd n bit , drill bit, drilling bit ● … bituminous emulsion is injected into soils which have a particle size of 2 - 0.6 mm ] ● .