SURE: Report on radial jet-drilling (RJD) stimulation technology

For this report, about 100 scientific publications related to the development of the radial water jet drilling technology were reviewed. Reviewed publications report mainly about laboratory as well as field experiments performed between 1965 and 2016. In addition, theoretical considerations as well as methods for numerical simulation were evaluated. All presented technologies and related advantages and limitations reflect the state of the art at the time of publication. Specific quantities and values presented in individual publications may represent the evolving technology readiness level over the past 50 years. The attempt was made to categorise the primary focus of the individual publications leading to the current state of the art radial water jet drilling technology (Section 4) into individual key technological developments. Identified key technological developments influencing to the current radial water jet drilling are: • Rock Penetration (Section 3.1) • Pulsed Water Jets (Section 3.2) • Abrasive Water Jets (Section 3.3) • Cutting Rocks (Section 3.4) • Perforation & hydraulic Stimulation (Section 3.5) • Jet Assisted Drilling (Section 3.6) • Ultra short-Radius Radial System (URRS) (Section 3.7) • Numerical Simulation related to Jetting Technology (Section 4.2) Based on these developments, the current state of the art for radial water jet drilling is described in section (Section 4.1). In addition an up-to-date technology readiness level based on current industry experience is included