| Quality Management | A documented quality-management system based on ISO 9001:2015, with controlled procedures for design, purchasing, production, inspection, and corrective action. | Valid ISO 9001 certificate, certification-scope statement, recent surveillance-audit record, inspection and nonconformity reports. | Does the certificate cover the actual manufacturing site and the relevant drilling-rig product scope? | Critical |
| Product Design | The rig should have documented design calculations and operating limits for rated pullback, rotary torque, hydraulic pressure, drilling-fluid flow, and maximum recommended bore size. | Technical datasheet, general arrangement drawing, hydraulic schematic, load charts, design-risk assessment, and operating manual. | Are rated values clearly separated from peak or short-duration values, and are they supported by test data? | Critical |
| Factory Acceptance Testing | Each completed unit should undergo documented functional testing before shipment, including engine performance, hydraulic functions, travel, rotation, pullback, emergency stop, alarms, and control-system operation. | Unit-specific factory acceptance test report containing serial number, test date, measured values, calibration references, defects, and approval signatures. | Will the supplier provide the complete test record for the exact machine being purchased rather than a generic sample? | Critical |
| Traceability | Major safety- and performance-related parts should be traceable by batch or serial number, including the engine, hydraulic pumps, hoses, control valves, gearbox, drill pipe, and structural components. | Bill of materials, incoming-inspection records, material certificates where applicable, component serial-number list, and production traceability procedure. | Can failed components be traced back to the supplier, production batch, inspection result, and installation date? | High |
| Safety Engineering | The machine should include guarded moving parts, accessible emergency stops, clear operating controls, warning labels, safe maintenance access, pressure-relief protection, and documented lockout or isolation procedures. | Risk assessment, safety-circuit diagram, emergency-stop test record, operator manual, maintenance manual, and machine photographs showing guards and access points. | Can the supplier demonstrate emergency-stop performance and explain how stored hydraulic or mechanical energy is safely isolated? | Critical |
| Regulatory Compliance | Compliance documentation should match the destination market. For European delivery, verify applicable machinery, electromagnetic-compatibility, and electrical-safety requirements; for other markets, confirm local regulations before order placement. | Declaration of Conformity where applicable, technical file index, risk assessment, applicable test reports, user instructions, and conformity markings. | Is the conformity documentation issued for the supplied configuration, engine, control system, and destination country? | Critical |
| Welding and Structural Quality | Load-bearing frames and critical welded joints should follow documented welding procedures, qualified personnel requirements, dimensional checks, and non-destructive testing appropriate to the risk and design. | Welding procedure specifications, welder qualification records, dimensional inspection reports, coating records, and applicable visual, magnetic-particle, dye-penetrant, or ultrasonic test reports. | Which critical welds are inspected, what acceptance criteria are used, and who approves repairs or deviations? | High |
| Hydraulic System Reliability | Hydraulic hoses, fittings, valves, and pumps should be correctly rated for system pressure, protected from abrasion and heat, routed to avoid excessive bending, and checked for leakage during testing. | Hydraulic schematic, component pressure ratings, hose identification records, pressure-test results, leakage inspection report, and recommended-fluid specification. | What are the continuous and maximum hydraulic pressures, and what inspection interval is recommended for hoses and fittings? | Critical |
| Drill Pipe and Tooling | Drill pipe size, thread type, material, joint strength, allowable curvature, and recommended operating torque should match the rig’s rated performance and the planned ground conditions. | Drill-pipe specification, material or batch certificate, thread inspection record, torque guidance, bending-radius limits, and compatibility list for tooling. | Are the supplied pipes suitable for the maximum stated torque and pullback, and how are damaged threads identified and rejected? | High |
| Environmental Management | Prefer a documented environmental-management system based on ISO 14001:2015, together with controls for hydraulic-oil spills, drilling-fluid handling, noise, waste, and end-of-life parts. | ISO 14001 certificate where available, environmental procedures, spill-response plan, waste-transfer records, and noise or emissions information. | What provisions are supplied for spill containment, fluid recycling or disposal, and environmentally responsible maintenance? | Medium |
| Worker Health and Safety | A manufacturer operating an ISO 45001:2018-based occupational-health-and-safety system demonstrates formal hazard identification, training, incident reporting, and corrective-action processes. | ISO 45001 certificate where available, safety-training records, incident statistics or summaries, risk assessments, and site-audit evidence. | How are production hazards, contractor safety, and corrective actions monitored at the manufacturing site? | High |
| Service and Spare Parts | The supplier should provide parts manuals, exploded drawings, fault codes, maintenance schedules, recommended consumables, and a defined process for technical support and urgent parts requests. | Sample parts catalogue, service manual, spare-parts price list, parts-identification procedure, service-contact details, and inventory or lead-time statement. | Can parts be identified from the machine serial number, and are commonly replaced filters, seals, hoses, sensors, and wear parts stocked? | Critical |
| Warranty and Claims | The purchase contract should state the warranty period, start date, covered components, exclusions, response time, labor responsibility, freight responsibility, and procedure for documenting defects. | Signed warranty terms, sample claim form, escalation process, service-response commitment, and records of corrective-action closure. | Is the warranty tied to delivery, commissioning, or operating hours, and what happens if a defect repeatedly reappears? | Critical |
| Operator Training | Delivery should include practical commissioning and operator training covering setup, drilling-fluid control, torque and pullback limits, emergency procedures, daily inspection, and safe maintenance. | Training agenda, attendance record, competency checklist, commissioning report, multilingual manuals, and training-video or remote-support plan. | Is training performed on the customer’s exact configuration, and are competency records supplied after completion? | High |
| Delivery and Acceptance | The contract should define configuration, accessories, documentation, packaging, preservation, shipping condition, installation responsibilities, commissioning criteria, and final acceptance tests. | Signed technical specification, packing list, pre-shipment inspection report, photographs, commissioning checklist, and final acceptance certificate. | Which measured results allow the buyer to accept, reject, or require correction of the delivered machine? | Critical |