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  • Title: Impact of the drilling fluid system on the effectiveness of a high pressure jetting assisted rotary drilling system.
    Author: Echt T, Stoxreiter T, Plank J.
    Journal: Heliyon; 2020 Jun; 6(6):e04179. PubMed ID: 32577565.
    Abstract:
    An enhanced drill bit combining high pressure fluid jetting with a conventional rotary drilling system incorporating a tailored drilling fluid was designed to improve drilling performance in hard crystalline rock. Full scale drilling experiments (8 ½ inch bit size) were performed utilizing a specially designed sepiolite fluid and comparing its performance with water and xanthan gum as a standard geothermal drilling fluid. The novel drilling system improved the rate of penetration by over 70% compared to the conventional drill bit without jetting assistance. In addition, the sepiolite drilling fluid retained its fluid properties even after high pressure jetting.
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