Full-Hydraulic Core Drilling Rig Solution for Deep-Hole Core Drilling

Mar 23, 2026

Aiming at the core requirements of high core recovery rate and accurate geological information in geological sampling, a solution centered on full-hydraulic core drilling rigs can systematically solve the difficulties of sampling and low efficiency in complex formations. The following is a detailed scheme based on industry-leading equipment and typical engineering practices.

Solution Overview

This solution is applicable to scenarios requiring high-quality core samples, such as detailed mineral exploration, geological research, and engineering geological investigation. It demonstrates distinct advantages especially in complex formations like hard rock and fractured zones.

Scheme Module	Details & Technical Key Points	Problems Solved & Advantages
1. Equipment Selection	Adopt full-hydraulic crawler core drilling rig (e.g., XDX-6). Key parameters: – Drilling depth: Up to 2000 m with BQ drill rods – Power head torque: 1978–865 Nm (low gear) – Hoisting force: 240 kN – Feed force: 120 kN	Crawler chassis enables relocation in complex terrains such as mountains and hills. Full-hydraulic drive realizes stepless speed regulation and precise feed pressure control.
2. Core Drilling Technology	Wireline coring technology: The core barrel is installed inside the drill rod. When full, no rod tripping is needed; the core barrel is hoisted to the surface via a wireline winch for core extraction, then lowered back to the bottom for continuous drilling. 2. Equipped with an auxiliary winch (rope speed up to 130 m/min) for wireline fishing.	1. Reduce tripping frequency: Tripping in deep holes takes hours; wireline coring saves massive auxiliary time, improving overall efficiency by over 30%. 2. Protect core integrity: Minimize core disturbance during tripping, achieving a core recovery rate above 95%.
3. Operating Procedure	① Rig positioning: Self-propelled to the hole site, leveled with hydraulic outriggers, adjust drilling angle (0–90°). ② Pilot drilling: Use conventional single-tube tool for pilot hole and install casing. ③ Wireline coring: Switch to wireline coring tools, set constant-pressure parameters (adjust WOB and RPM based on lithology), drill continuously to the end of a run. ④ Core recovery: Lower fishing tool via winch, catch and hoist the core barrel, take out cores, number and box them. ⑤ Repeat ③–④ until reaching the final depth of 2000 m. ⑥ Hole completion: Optional geophysical logging, grouting and sealing.	Constant-pressure drilling system supports automatic/manual bit pressure setting, boosting efficiency and extending bit life. Dynamic parameter display for real-time monitoring of rotation speed, oil temperature, pump pressure, drilling depth, etc.
4. Quality Control	– Drill rod configuration: Select proper drill rod series according to depth; BQ (φ56) drill rods for 2000 m. – Wall protection: High-quality drilling fluid, casing if necessary. – Core handling: Place cores in core boxes in sequence, mark hole number, run, depth, and take photos for records. – Deviation monitoring: Measure inclination every 100 m and correct timely.	Ensure core quality meets requirements for geological logging and laboratory testing.

Core Advantages

High coring efficiency: Wireline coring shortens single coring time to 1/3 of conventional methods, greatly reducing auxiliary time in deep-hole drilling.

High core recovery rate: Full-hydraulic system provides stable feed and speed control, minimizing mechanical damage; core recovery rate stably exceeds 95%.

Strong terrain adaptability: Crawler chassis can travel on slopes ≤30°, suitable for roadless mountain exploration areas.

Multi‑functionality: Besides coring, also applicable to water wells, engineering geological investigation, micro-pile holes, etc.

Full-Hydraulic Core Drilling Rig Solution for Deep-Hole Core Drilling

Comparison with Other Drilling Solutions

To clarify the positioning of this solution, it has obvious application differences from several drilling rigs you previously considered:

Solution Type	Core Purpose	Sampling Method	Applicable Scenarios
Full-hydraulic core drilling rig (This solution)	Deep geological coring	Core (intact column)	Mineral detailed survey, geological research, deep prospecting
Crawler RC drilling rig	Rapid geochemical sampling	Cuttings	Regional reconnaissance, grade control
Crawler DTH drilling rig	Blasthole drilling	No sampling	Open‑pit mining
Portable pneumatic DTH drilling rig	Bolt hole construction	No sampling	Slope stabilization

Summary & Recommendations

This solution, combining full‑hydraulic core drilling rig + wireline coring technology, is a mature choice for high‑quality coring in deep holes over 1500 meters. Key points for implementation:

Drill rod configuration: BQ (φ56) series is recommended to ensure drilling capacity at 2000 m.

Drilling fluid design: Optimize fluid properties according to formation lithology (e.g., fractured zones, water‑sensitive formations).

Operator training: Wireline coring requires relatively high operating proficiency.

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