Rock Drilling Articles

  • The mechanism and law of wellbore instability due to drill string impact in air drilling

    Due to the low density and small damping factor of gas, drill string vibration in air drilling is much more violent than that in mud. Drill string impact on wellbore wall has a vital effect on wellbore stability in many cases. However, there are few researches about drill string impact on wellbore wall so far. In this paper, the calculation model of drill string impact on wellbore wall was ...

    By Inderscience Publishers

  • Coiled Tube Turbodrilling: a proposed technology to optimise drilling deep hard rocks for mineral exploration

    The need to drill deep boreholes more efficiently for mineral exploration has raised the attention to investigate the feasibility of recent drilling technologies for such applications. The two principal methods of Reverse Circulation (RC) and diamond core drilling are usually used in combination by mine operators are subjected to certain limitations and inefficiencies. Considering that delivering ...

    By Inderscience Publishers

  • A fuzzy logic based classification for assessing of rock mass drillability

    This paper describes a fuzzy classification system for evaluating of rock mass drillability. Six parameters; Uniaxial Compressive Strength (UCS), joints dipping, Mohs hardness, joints aperture, joints spacing and grain size have been used. In this fuzzy system, each rock mass is classified into five modes from very poor to excellent condition. As a case study, 15 rock masses in two mines in Iran ...

    By Inderscience Publishers

  • Backreaming through rock — with AXIS Guided Boring System

    Taking on a challenge is nothing out of the ordinary for the experienced trenchless installation experts at Midwest Mole. Since its founding in 1982, the Indianapolis-based contactor has earned a reputation for installation innovation; overcoming obstacles and defying the odds. So, these trenchless pros didn’t hesitate to take on another challenge despite the recognition that they would ...

    By Vermeer

  • Ask a FLUMP Expert. Seven ways to Secure your Traverse System

    -For full article with pictures go here:   When using an unmanned dredge, the propulsion system is critical.  The FLUMP, SRS Crisafulli's unmanned dredge, propels itself along a traverse cable. The drive system ...

    By SRS Crisafulli, Inc.

  • Installing gravity sewer in tough Georgia rock

    It took a contractor who was receptive to an innovative new installation approach, a good deal of patience and a whole lot of determination — after two previous attempts by other contractors using drills and air hammers were unsuccessful — to finally conquer a pesky 800-foot (243.8 m) stretch of tough Georgia blue granite. Hence, project owner Coweta County Water and Sewer Authority ...

    By Vermeer

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you