1. Compact utility rig Small projects | 10–25 kN (2,250–5,600 lbf) | 1–4 kN·m (740–2,950 lbf·ft) | Short service connections, landscaping, and small-diameter utility installations in suitable ground. | Highly maneuverable; commonly suited to tight residential sites and smaller access routes. | $40,000–$120,000 |
2. Light-duty utility rig Residential work | 25–45 kN (5,600–10,100 lbf) | 3–8 kN·m (2,200–5,900 lbf·ft) | Residential water, gas, power, and communications work with moderate bore lengths. | Often truck-, trailer-, or compact-track-mounted; easier to transport than larger rigs. | $100,000–$250,000 |
3. Mid-size utility rig General-purpose | 45–90 kN (10,100–20,200 lbf) | 7–18 kN·m (5,200–13,300 lbf·ft) | Municipal utilities and contractor work requiring a balance of pullback, torque, and job-site flexibility. | Typically transported by truck or trailer; needs more working room and a prepared setup area. | $220,000–$500,000 |
4. Medium-heavy rig Longer installations | 90–180 kN (20,200–40,500 lbf) | 15–35 kN·m (11,100–25,800 lbf·ft) | Longer utility crossings and larger-diameter installations, subject to ground conditions and tooling. | Usually truck- or trailer-transported; requires more staging space and support equipment. | $450,000–$900,000 |
5. Heavy-duty rig Major utility work | 180–350 kN (40,500–78,700 lbf) | 30–65 kN·m (22,100–47,900 lbf·ft) | Large utility installations and demanding crossings where high pulling force and torque are needed. | Low site mobility; transport, access planning, and a substantial work area are typically required. | $800,000–$1,600,000 |
6. High-capacity rig Large crossings | 350–700 kN (78,700–157,400 lbf) | 60–130 kN·m (44,300–95,900 lbf·ft) | Large-diameter pipeline and infrastructure projects requiring engineered drilling plans and support systems. | Low mobility between sites; typically needs heavy-haul transport, specialized setup, and a large footprint. | $1,500,000–$3,000,000 |
7. Large-project rig Specialized projects | 700–1,500+ kN (157,400–337,200+ lbf) | 120–250+ kN·m (88,500–184,400+ lbf·ft) | Very large or technically demanding crossings planned around project-specific geology, tooling, and installation requirements. | Very low mobility; requires heavy transport, extensive site preparation, and coordinated support equipment. | $3,000,000–$6,000,000+ |