Drilling Rig FAQ: Products & Applications

How do I choose between CSD, CMD, CKD, CMR and ZYL rigs?

CSD for surface exploration coring, CMD for large-diameter CBM/geothermal/ventilation/dewatering/rescue wells, CKD for underground/tunnel core drilling, CMR for flexible multi-purpose surface programs, and ZYL for in-seam directional drilling (methane drainage and rock-burst prevention) inside coal seams.

How deep can a core drilling rig drill?

Depends on rod size. The CSD1300L is rated 1,300 m on B-size rods, 1,000 m on N, 700 m on H and 400 m on P. The CSD series spans 400 m to an ultra-deep 3,000 m.

What depth did CSD rigs reach in real exploration?

The CSD1300L completed 4,000 m of cumulative wireline core with a deepest hole of 430 m in a 7-month gold campaign; a CSD3000 reached 1,688 m at 5,100 m altitude and 3,000 m in a coalfield program.

Can a core rig work at high altitude?

Yes. CSD rigs have operated at 5,090 m and 5,100 m elevation on the Tibetan plateau copper projects (1,548 m and 1,688 m holes, 43 and 52 days).

Which rig suits desert plateau uranium exploration?

The CMR1000A multi-purpose rig completed a plateau-desert uranium program with 28 boreholes and a deepest hole of 850 m.

What rotation torque does the CSD1300L deliver?

4,257 Nm maximum rotation torque at up to 1,182 rpm, with 127 kN lifting and 50 kN feed force.

Is the CSD1300L mobile in rough terrain?

It is crawler-mounted with a 30° climbing capacity and 2 km/h tramming speed, at only 8.5 t — it relocates itself between scattered sites without a crane.

Can core rigs drill at an angle?

The CSD1300L mast operates at 45°–90° drilling angles, supporting inclined and vertical holes.

Can the CMD100 drill directional and horizontal wells?

Yes. A CMD100 drilled a 2,010 m CBM directional well with 950 m horizontal section and a maximum inclination of 88.42°.

How fast is a CBM horizontal well?

An L-type CBM horizontal well with 1,060 m vertical depth was completed in only 16 days with the CMD100.

What pullback does the CMD100 provide?

100 t (1,000 kN) pullback and 20 t (200 kN) pulldown, from a top drive producing 27,500 Nm at 0–100 rpm and 9,700 Nm at 0–300 rpm.

What engine powers the CMD100?

A Chongqing Cummins KTA19-P750 delivering 559 kW, on a 55 t rig with six hydraulic outriggers.

Can CMD rigs handle CBM production wells at scale?

A CMD180SD drilled five CBM production wells to a deepest 1,280 m, with a single well producing up to 12,000 m³/day.

What is the deepest geothermal well Jinneng has drilled?

A CMD180T drilled an ultra-deep geothermal well to 3,780 m, completed in 230 days.

How fast can air DTH drill hard rock?

A CMD100 air-DTH geothermal well reached 2,004.42 m; in hard-rock geothermal service DTH methods raised penetration 5–10× over conventional rotary.

What penetration rate has been recorded?

On the 2,004.42 m air-DTH well, a single shift reached 192 m, peaking at 24 m/h.

Can rigs handle hot-dry-rock temperatures?

A CMD150T performed blowout-control work at 158°C on a hot-dry-rock well, and has drilled 2,600 m (four-opening) and 3,000 m (five-opening) geothermal wells.

Does the CMD100 support different drilling fluids?

Its integrated 20.6 MPa manifold supports air, mud and foam drilling, letting crews switch methods by formation.

How fast can a rescue hole be drilled?

A CMD100 built a 117 m rescue life channel to trapped miners in under 5 hours during a mine water-inrush event.

What about supply holes during an entrapment?

A CMD100 drilled a supply borehole in 8 hours, allowing miners to receive supplies within 36 hours of entrapment.

Can a large-diameter rescue capsule hole be drilled?

The CMD100 has demonstrated large-diameter rescue drilling for a Φ711 mm hole sized around a 660 mm rescue capsule.

Is there an air-transportable modular rescue rig?

The CMD50L modular rig drilled a Φ600 mm, 80 m rescue hole in 6 hours, designed for fast, modular deployment.

How deep a ventilation shaft can be drilled?

A truck-mounted CMD130 built a finished Φ710 mm ventilation shaft to 920 m in 32 days through hard, fractured rock.

What is the pilot-plus-reaming method for ventilation shafts?

Drill a small pilot first (Φ216 mm to 254 m in 2 days), then ream in steps (Φ470 mm, then Φ710 mm) at 3–5 m/h. A whole ventilation shaft was finished in 26 days.

How long does a 250 m coal-mine ventilation borehole take?

The 254 m pilot took 2 days; with two reaming passes to Φ710 mm at 3–5 m/h, the total was 25 days.

Can dewatering wells be drilled quickly in flooded mines?

A CMD100 drilled a Φ710 mm × 280 m dewatering rescue well in 18 days, delivering over 5,000 m³/day of drainage using air reverse circulation.

What diameter program is used for large dewatering wells?

A Φ1100 mm cased first opening, a Φ900 mm DTH second section to 13 m, reduced to Φ650 mm at 7 m, then continued to 253 m.

Why is air reverse circulation used in water-bearing ground?

It lifts cuttings and water efficiently, improving hole cleaning and wall stability in fractured, high-inflow formations — key to dewatering rescue wells.

Does Jinneng make automated workover rigs?

The DW20 automated workover rig cut well-workover cycle time by 50% and reduced labor by 60% in a Daqing oilfield sidetrack application.

What is the smart-mine drilling fleet?

A CMD60L plus CRD3000 automated fleet at Shendong smart mine ran 8,000 hours without failure and lifted efficiency by 40%.

What is the CKD600G underground core rig?

The CKD600G is a compact, modular full-hydraulic underground core drilling rig for high-precision wireline coring in non-coal solid mineral deposits. Its mast drills from −90° to 90° for all-angle work in narrow tunnels and galleries, and it is equally effective for surface exploration, grouting and geological investigation.

Truck-mounted vs crawler rig — which do I need?

Truck-mounted rigs (e.g. CMD130 on a 10×8 carrier at 54.5 t legal weight) move fast between sites without heavy haulage; crawler rigs (e.g. CSD1300L) self-relocate over rough terrain.

What is the CMD130's transport weight?

54.5 t legal road weight (60 t maximum operational), on a 10×8 carrier with a 338 kW carrier engine and six outriggers.

What torque does the CMD130 deliver?

31,000 Nm breakdown torque at up to 300 rpm, from a 567 kW Cummins QSK19-C760 upper deck.

What is an in-seam directional drilling rig (ZYL)?

The ZYL series drills long-range boreholes entirely within the coal seam, rather than through surrounding rock. It is the proven method for maximizing methane (coalbed gas) extraction, preventing rock bursts, and safeguarding longwall operations. ZYL rigs are MA-certified (the ZYL-6000D also carries the CE Mark) and field-proven in more than 200 high-gas mines across Shanxi, Inner Mongolia and international basins.

Why drill in-seam instead of cross-measure?

Because the borehole stays 100% in the target seam, in-seam drilling delivers 30–50% higher gas flow rates; lower torque resistance (no hard rock) means longer tool life and lower energy use; integrated MWD holds trajectory deviation to ≤1% over 1,500 m; and it reduces hole-collapse risk in soft, gassy seams.

Which applications do ZYL rigs cover?

Coalbed methane drainage, rock-burst (outburst) prevention and stress relief ahead of longwall faces, methane monitoring, water detection, and grouting in underground coal mines — from shallow monitoring (around 400 m) to ultra-deep drainage beyond 1,500 m.

How do I choose between the ZYL models?

Match depth and roadway clearance to the model:

• ZYL-6000D — 600 m, dual-torque (4,000/6,000 N·m), self-propelled crawler, no external transport.
• ZYL-7500D — 500 m in low-headroom roadways under 3 m (1,550 mm height, under 7 t).
• ZYL-8000D — 1,000 m rock-burst prevention with an integrated mud pump for remote mines; 8,000 N·m.
• ZYL-9000D — 1,000 m in soft, outburst-prone seams; 9,000 N·m adaptive torque; modular split-structure under 3.8 m roadways.
• ZYL-15000D — 1,500 m high-rate methane drainage; 15,000 N·m continuous torque; co-developed with the China Coal Research Institute (CCRI).
• ZYL-18000D — 1,500 m+ ultra-deep, high-stress gassy seams; 18,000 N·m industry-leading torque.

What certifications do ZYL rigs carry?

The ZYL series is MA-certified for underground service, and the ZYL-6000D also carries the CE Mark. For coal-mine projects outside China, confirm the required local mine-safety approval with our export team.

How is borehole trajectory controlled?

Through integrated MWD (Measurement While Drilling) and intelligent feed/torque control, holding deviation to ≤1% over 1,500 m and keeping the hole stable in soft, gassy or fractured seams.

Can ZYL rigs be customized for a specific mine?

Yes. Models are available as crawler-mounted, self-propelled or modular split-structure configurations (some transportable through roadways under 3–3.8 m wide), with options such as dual-torque, integrated pumping or remote operation.