CBM drilling rig

Technical Specifications – CBM Drilling Rig Models

Our CBM drilling rig series is available in three capacity classes to match typical coal seam depths.

Parameter	CBM‑150	CBM‑250	CBM‑350
Hook load capacity	150 tons	250 tons	350 tons
Drilling depth (conventional)	1,200 m (4" DP)	2,000 m	2,800 m
Drilling depth (air/foam)	800 m	1,400 m	2,000 m
Mast type	Single telescoping	Single telescoping	Two‑section folding
Mast height	70 ft (21 m)	85 ft (26 m)	100 ft (30.5 m)
Power unit	Diesel 300 HP	Diesel 500 HP	Diesel 750 HP
Air compressor	1,000 CFM @ 250 PSI	1,500 CFM @ 350 PSI	2,000 CFM @ 500 PSI
Foam injection pump	5 GPM @ 500 PSI	10 GPM	15 GPM
Mud pump (optional)	500 HP triplex	800 HP triplex	1,000 HP triplex
Top drive (optional)	150 t @ 200 RPM	250 t @ 180 RPM	350 t @ 150 RPM
Rotary table	17½" opening	20½" opening	27½" opening
Solids control	3‑stage (cyclone + shaker + dust collector)	4‑stage (add centrifuge for foam)	Full 5‑stage
Transport modularity	3 truckloads	5 truckloads	8 truckloads
Rig‑up time (crew of 3)	4 hours	5 hours	6 hours
Tracked carrier option	Yes (rubber tracks)	Yes (rubber or steel)	Yes (steel)
Certifications	API 4F, 7K, ISO	API 4F, 7K, 8C	API 4F, 7K, 8C

Product Types – CBM Drilling Rigs & Support Equipment

We offer complete CBM drilling rig packages and supporting equipment:

1. CBM‑150 (Light) – For shallow coal seams (under 800 m). Trailer‑mounted or skid‑mounted. Air drilling only. Ideal for exploration and dewatering wells.

2. CBM‑250 (Medium) – Most popular model. Handles 1,000‑1,500 m coal seams. Dual mode (mud or air/foam). Top drive ready.

3. CBM‑350 (Heavy) – For deep CBM (2,000+ m) or hard formation drilling. Also suitable for shallow oil wells. Full circulating options.

4. Air Package (standalone) – If you already have a conventional rig, we can supply a bolt‑on air compressor, booster, and foam injection skid to convert it for CBM service.

5. Cuttings Management for CBM – Dry dust collector with automatic bag shaker, or foam cuttings dewatering unit. Prevents coal fines from contaminating the site.

6. Produced Water Handling – Transfer pumps, temporary storage tanks (100‑500 bbl), and basic water treatment for discharge or reinjection.

7. Gas Monitoring & Safety System – Fixed methane sensors on rig floor, in mud/gas separator, and at compressor exhaust. Visual/audible alarms and automatic engine kill.

Applications – Where Our CBM Drilling Rigs Are Used

Our CBM drilling rig has been deployed in:

• Coal bed methane fields – Qinshui Basin (China), Bowen Basin (Australia), San Juan Basin (USA), Raniganj (India). Shallow, low‑pressure reservoirs requiring under‑balanced drilling.

• Coal mine degasification – Drilling horizontal or vertical boreholes from the surface into active coal mines to capture methane ahead of mining. Safety priority – our gas monitoring is critical here.

• Abandoned mine methane – Drilling into sealed mine workings to recover trapped gas. Requires careful pressure control – air/foam drilling prevents ignition.

• Shallow tight gas – Not CBM, but our rigs can also drill conventional tight gas to 2,000 m. Lower cost than a full‑size oil rig.

• Exploration core drilling – With a core barrel, the CBM‑150 can take coal cores for lab analysis. Light weight minimizes pad construction in remote areas.

• Water well & geothermal – Same shallow depth, low footprint. Rigs are versatile enough for non‑oil & gas applications between CBM projects.

Why Choose SJ Petro for Your CBM Drilling Rig?

• Sinopec‑backed engineering – We are a direct subsidiary, not a small fabricator. Our 314 R&D engineers understand the specific challenges of coal seam drilling: formation damage, gas safety, water handling.

• Proven in major CBM basins – Over 30 CBM rigs delivered to China’s Qinshui Basin (the country’s largest CBM field) plus exports to Australia and India. References available.

• Air/foam capability as standard – Many rigs sold as "CBM ready” require expensive aftermarket air packages. Ours come fully integrated, with compressors sized for coal.

• Environmental compliance – Low ground pressure tracks, dust control, and produced water management help you meet local environmental regulations – a growing concern in coal mining regions.

• Quick mobilization – Modular design fits in standard shipping containers or flatbed trucks. We have reduced rig‑up time to as little as 4 hours from arrival on site.

• Operator safety – Methane detection, automatic shutdown, and explosion‑proof electricals are not optional – they are built in. We have worked with mining safety regulators worldwide.

• Spare parts & training – We stock CBM‑specific spares (air compressor valves, foam pump seals, dust collector bags) in regional hubs. We also train your crews in safe CBM drilling practices.

• Competitive pricing – Because our CBM rigs use lighter materials and fewer components than deep oil rigs, we offer them at 30‑50% less than a converted oil rig of similar depth capacity.

• Warranty – 12 months on all components. Extended warranty available for compressors (24 months).

Frequently Asked Questions (FAQ)

Q1: What is the main difference between a CBM drilling rig and a conventional oil rig?
CBM rigs are lighter (150‑350 ton hook load vs 450‑900+ ton), have integrated air/foam drilling capability, include methane safety systems, and are designed for quick, low‑impact moves. They drill shallower wells (under 2,500 m typically) and prioritize formation protection over pure speed.

Q2: Can your CBM drilling rig also drill conventional oil or gas wells?
Yes – the CBM‑350 can drill conventional oil/gas wells up to 2,500‑3,000 m with mud circulation. The CBM‑250 is suitable for shallow oil (under 1,500 m). However, if your primary target is deep oil, we recommend our standard land rig series.

Q3: Do you offer a trailer‑mounted CBM rig for very rapid moves?
Yes – the CBM‑150 is available as a trailer‑mounted unit (single axle or tandem). It can be towed by a standard heavy truck and requires no crane for rig‑up. Ideal for exploration programs with dozens of shallow test holes.

Q4: How do you handle coal fines in air drilling?
Our dry dust collector uses a two‑stage cyclone plus pulse‑jet bag filter. It captures 99.5% of particles down to 2 microns. The collected fines can be mixed with drilling fluid for disposal or returned to the site. For foam drilling, we use a shaker and centrifuge to remove fines from the liquid phase.

Q5: Is your CBM drilling rig certified for use in coal mining areas with explosive gas?
Yes – all electrical components on the rig floor and within 15m of the wellhead are ATEX/IECEx Zone 1 rated. The gas monitoring system is SIL‑2 certified. We have worked with mining safety regulators in China (MA认证), Australia (MDG 41), and India (DGMS) to adapt our designs.

Q6: How much water do CBM wells typically produce, and does your rig handle it?
CBM wells can produce from zero to 500+ barrels of water per day. Our rig includes a water transfer pump (200 GPM) and a 100‑bbl temporary steel tank. For higher water rates, we can add modular water storage or direct pump‑to‑disposal.

Q7: What is the typical cost of a CBM drilling rig?
Budget range: CBM‑150 starts at 850,000,CBM‑250at850,000,CBM‑250at1.6M, CBM‑350 at 2.8M(FOBChina,includingaircompressorandbasicsolidscontrol).Topdriveadds2.8M(FOBChina,includingaircompressorandbasicsolidscontrol).Topdriveadds150‑250k. Used CBM rigs from our fleet start at $450k. Prices vary with options – request a firm quote.

Q8: Can I use my existing mud pumps with your CBM rig?
Yes – if you already have mud pumps, we can supply the rig without pumps and provide adapters for your units. However, we strongly recommend including our air/foam package even if you use your own mud pumps – that is the key to CBM formation protection.

Q9: Do you provide operator training for CBM drilling techniques?
Yes – we include 5 days of training (classroom + field) with every rig purchase. The training covers air/foam drilling parameters, methane safety, handling coal fines, and managing produced water. We can also arrange a one‑week supervised drilling of your first well.

Q10: How do I get a quote for a CBM drilling rig?
Email cbm@sjpetro.com with:

• Target coal seam depth and expected formation type

• Preferred drilling method (air, foam, mud, or combination)

• Daily water production estimate (if known)

• Road access and pad size constraints

• Any local safety certifications required (e.g., Australian MDG, Indian DGMS)
  We will respond with a preliminary specification and budget price within 3 working days.