| Thrust and pullback force | Rated thrust and pullback force, stated in kN, and the conditions under which each rating is measured. | Technical data sheet, operating manual, and confirmation that ratings are continuous or peak values. | These ratings help determine whether a rig is suitable for the planned bore, tooling, and expected ground conditions. They should not be compared without checking how the figures are defined. |
| Rotary torque and speed | Maximum and operating torque, usually stated in kN·m, plus the available rotational-speed range in rpm. | Torque-speed chart and details of the rotary drive and control system. | Torque and speed affect the rig’s ability to operate the drill string and tooling. A torque figure alone does not describe performance across the full speed range. |
| Drill pipe and tool compatibility | Supported pipe diameter and length, connection type, and compatible tooling options. | Pipe specifications, connection drawings, and a list of supported tooling interfaces. | Compatibility helps avoid mismatches among the rig, drill string, reamers, and other equipment used on the job. |
| Fluid system | Whether a fluid pump is included or separate; pump flow rate in L/min and pressure in MPa; and available fluid-system controls. | Pump nameplate data, system diagram, and the stated test conditions for flow and pressure. | Drilling fluid supports bore cleaning and helps manage the bore. Required flow and pressure depend on the tooling, bore plan, and ground conditions. |
| Guidance and locating compatibility | Supported locating or guidance systems, communication method, and compatibility with the buyer’s intended tracking equipment. | Compatibility statement, operating instructions, and details of any required interfaces or accessories. | Guidance requirements vary by project and local conditions. Buyers should confirm that the rig and locating equipment can be used together. |
| Machine dimensions and transport | Transport dimensions, operating weight, loading method, and any setup requirements at the jobsite. | Dimensioned drawings, transport-weight information, and lifting or loading instructions. | Transport limits, access routes, and site constraints can affect delivery, setup, and equipment selection. |
| Power and operating requirements | Power source, rated power in kW, fuel or electrical requirements, and stated operating limits. | Power-system specifications, maintenance schedule, and operating manual. | These details help buyers assess site readiness, operating costs, and whether the machine suits the available power and working environment. |
| Controls and safety features | Control layout, emergency-stop arrangements, operator visibility, and documented safety provisions. | Operator manual, safety documentation, and an opportunity to inspect or demonstrate the machine. | Operators need clear procedures and suitable safeguards. Buyers should assess the actual machine and documentation rather than rely on a feature list alone. |
| Service and spare-parts support | Service coverage, parts availability, technical-support channels, and stated warranty terms. | Written warranty, service contacts, parts lead-time information, and maintenance support details. | Support availability can affect machine uptime and the time required to resolve faults, especially when operating far from a service center. |
| Compliance and documentation | Applicable safety and regulatory documentation for the destination market, including any required declarations or certificates. | Copies of relevant declarations, certificates, manuals, and machine identification records. | Requirements depend on the market and intended use. Buyers should verify applicable local rules with the supplier and relevant authorities. |
| Total cost of ownership | Purchase price together with maintenance, wear parts, consumables, transport, training, and expected service costs. | Itemized quotation, recommended maintenance intervals, consumables list, and warranty exclusions. | A purchase price alone does not show the full cost of owning and operating an HDD machine over time. |