ABSTRACT
Other specialised drill configurations include dimensional stone top-hole drills, rotary horizontal underground drills, horizontal directional drills, geotechnical and environmental drill rigs.
Note that the following specialised drills are discussed in Chapter 3: • Raise bore drills (Section 3.20) • Sonic drills (Section 3.21) • Pile top drills (Section 3.22) • Push and drive bore drills (Section 3.23) • Dutch cone penetration drills (Section 3.24) • Coiled tube drills (Section 3.27).
