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  • Double Tube Core Barrel
  • Double Tube Core BarrelDouble tube core barrels are swivel head. The inner tube is attached with the core barrel head through bearings which makes the rotation of inner tube independent of core barrel. It serves to improve the rate of collection. Core barrels are designed for coring from soft to hard homogenous and slightly broken formations with water, mud, polymer or air flushing...
  • Triple Tube Core Barrel
  • Triple Tube Core BarrelTriple tube core barrel consists of outer tube and inner tube assembly. It is made up by adding a third tube to the standard wireline core barrel. This third tube is made of stainless steel, which is split lengthwise and nested inside the inner tube. Triple tube wireline core barrel has benefits of standard wireline system with additional advantage that difficult formations can...
  • BZU NZU Core Barrel
  • BZU NZU Core BarrelZU core barrel is suitable for drilling in tunnels. It is a superior tool for site investigation in soft to hard formations.1. It can drill holes upward or horizontally. 2. It has fast penetration speed compared with thicker wall core barrels. 3. ZU core barrel is suitable for various rock formations. 4. This core barrel offers higher percentage of core recovery and less erosion of core...

Core Barrels

CDG manufactures double tube and triple tube core barrels in length of 6mtrs, 3mtrs and 1.5mtrs. Water in double tube core barrel is injected between outer tube and inner tube. Perforation at the lower end of inner tube permits flow of water. From this point to diamond core bit is the only place which is subject to erosion. This distance is very short when compared to the total length of double tube core barrel. With the elimination of erosion problem, it becomes possible to take core of softer and broken materials. PO3/HO3/NO3 triple barrel uses an additional split inner tube to encourage an undisturbed sample recovery which in turn maintains present productivity levels.

1. BO/NO/NO2/HO/PO/BOU/NOU Double Tube Core Barrel
2. NO3/HO3/PO3 Triple Tube Core Barrel

1. Core barrels are designed and manufactured to provide excellent strength and durability in a variety of drilling conditions.
2. Advanced manufacturing techniques, premium alloy tubing and proven field results ensure optimum performance and longevity.
3. Double tube core barrel offers higher percentage of core recovery and less erosion of core.
4. Triple tube core barrel can help customers to get more complete core when drilling in the broken formation.

China Drilling Geological Equipment Ltd. is a professional manufacturer of drilling tools. Main products cover impregnated synthetic diamond core bits, surface-set diamond bits, PDC core and noncoring bits, rod shoes & casing shoes, reaming shells, drill rods, core barrels (including double tube core barrel and triple tube core barrel), overshots, water swivels, hoisting plugs, casing cutter assembly, adapter subs, wrenches, recovery tools and foot clamps. Our products are mainly used for geological prospecting.