Driven by abundant mineral resources and growing demand for infrastructure construction in Cameroon, efficient and eco-friendly drilling equipment has become a market highlight. Featuring water-free operation, contamination-free samples and high drilling speed, the reverse drilling machine has gradually replaced traditional drilling methods. YG supplies the reverse circulation drilling rig to Cameroon, helping two local clients from different sectors resolve long-standing construction difficulties.【WhatsApp/WeChat/Phone】+86 13837122632
Case Study 1: Reverse Drilling Machine Improves Sampling Efficiency for a Small Mining Company in Cameroon
Client Background
A private gold exploration mining company based in the Centre Region of Cameroon previously used conventional pneumatic drilling rigs. Rock cuttings from upper strata often mixed into samples, leading to inaccurate test results and repeated drilling for verification.
Construction Challenges
The mining area suffers from severe water shortage, making traditional mud drilling impossible. The fractured ground also frequently caused drill pipe sticking with standard drilling tools. The client was in urgent need of a reverse drilling machine that requires no water and delivers high-fidelity samples.
YG Solution
We recommended the YGRC-400 model. It uses compressed air to drive the down-the-hole hammer and creates reverse circulation. Rock cuttings are delivered upward through the inner tube of the drill pipe to the ground cyclone separator directly. The whole process requires no water. Samples never touch the borehole wall, so cross-contamination is fully avoided.
Project Process
The client found YG’s official website (https://www.ygmachineryexpert.com/) while searching for rc rigs for sale on Google. After watching video demonstrations and comparing detailed parameters, the client recognized the YGRC-400’s excellent performance in water-free operation and pure sample collection. YG’s technical team also adjusted the electrical system and heat dissipation devices to adapt to local voltage and high-temperature conditions in Cameroon. The contract was signed within two weeks. The equipment was shipped via the Port of Douala and arrived at the site 30 days later.
Operation Results
After commissioning, the reverse drilling machine maintains a daily drilling depth of 15 to 20 meters stably. Sample test results are highly consistent with the known vein distribution, and repeated drilling is no longer needed. The cost per borehole is cut by around 35%. The client stated that they can carry out continuous operations even in dry seasons for the first time.
Case Study 2: Reverse Drilling Machine Enables Accurate Limestone Exploration for a Quarry in Cameroon
Client Background & Construction Challenges
A quarry supporting a cement plant in western Cameroon needed to explore limestone thickness, grade and interlayer distribution for its five-year mining plan. The site previously combined percussive drilling and diamond core drilling, which brought two major problems. First, diamond bits wore rapidly and drilling progressed slowly in hard, fractured limestone, with a daily footage of only 6 to 8 meters. Second, the core recovery rate was below 40% in fractured formations. Geological engineers could not identify interlayer positions accurately due to incomplete samples. The client required a drilling solution that delivers fast penetration and continuous, contamination-free samples.
YG Solution & Project Process
YG’s technical team suggested the YGRC-400 reverse circulation drilling rig, matched with a high-pressure air compressor and high-impact down-the-hole hammer. With reverse circulation, rock cuttings flow upward at high speed through the inner tube. Continuous sampling is realized even in heavily fractured strata, and samples are arranged strictly in depth order without layer confusion.
The client doubted whether reverse circulation samples could truly reflect actual underground formations. YG engineers conducted an on-site test: colored tracers were put into the drill pipe, and clear color bands appeared in sample bags at corresponding depths. This completely eliminated the client’s concerns.
The final deal included the full rig set, 200 meters of dual-wall drill pipes, one spare cyclone separator, and three days of operator training. YG provided remote guidance for the first equipment commissioning.
Operation Results
The reverse drilling machine achieves a daily drilling depth of 18 to 22 meters in limestone strata, with a maximum hourly footage of 3.1 meters — 2.5 times the efficiency of the original combined drilling method. Collected rock cuttings are packed per meter. Geological engineers can distinguish high-calcium limestone, marl, and chert interlayers on site with naked eyes, and lab test results match subsequent mining verification perfectly.
Based on the drilling data, the quarry revised its blasting plan. Avoiding the stripping of one worthless interlayer alone saved approximately 40,000 US dollars in mining costs.
Q: Can YG rc drilling equipment work in northern Cameroon where water is scarce?
A: Absolutely. It uses compressed air for cuttings removal with zero water consumption, making it ideal for arid and semi-arid regions.
Q: Can the drilling depth reach 400 meters?
A: The YGRC-400 can drill stably to 400 meters in medium-hard rock formations. For deeper drilling, choose the YGRC-500 model with a maximum depth of 500 meters. The actual drilling depth is affected by air compressor displacement and ground conditions.
Q: How to control the risk of sample contamination?
A: Rock cuttings travel entirely inside the drill pipe inner tube and never contact the borehole wall. The inner tube is purged with compressed air before each pipe connection to further remove residual debris.
Contact YG
YG constantly supplies various models of rc rigs for sale, along with overseas technical support and spare parts. If you have drilling projects in Cameroon or other African regions, including mineral exploration, water well drilling, and geotechnical investigation, feel free to contact us for customized solutions. Let our efficient and eco-friendly rc drilling equipment help you cut costs and shorten construction time!
high-efficiency reverse drilling machine reverse circulation drilling rig manufacturer Driven by abundant mineral resources and growing demand for infrastructure construction …
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