Conventional Coring Barrel

Application
The Conventional Core Barrel is complete in forming a set, advanced on technology and a perfect tool in conventional coring operation. The tool is mainly used to obtain core in oil drilling well or in geological prospecting. Can assemble one to three inner and outer barrels in a single run and the tool is available to soft, medium, hard and mix stratum.
Main structural features and advantages of conventional coring tool:
1. The outer barrel is made of seamless thick-wall steel tube with high strength. The outer barrel, machined with spiral stabilizers, makes itself own extra high strength and stability. The outstanding features are beneficial to increase core recovery and lengthen the working life of diamond coring bit.
2. Besides the steel inner barrel, fiberglass inner barrel can also be offered, which has light weight, high resistance to heat and corrosion, high strength and smooth inside wall which contributes to a small drag force when allowing cores to enter the inner barrel easily. These features are very helpful for improving core recovery in loose and fractured formations.
3. The lengths of each joint of inner and outer barrel sections are identical. Operators can assemble a core barrel string with different lengths at will.
4. The core barrel stabilizer is finished with spiral ribs, which are hardfaced by hard tungsten carbide. The stabilizer is at last glazed and does not contain pores on the surface, which is helpful in reducing torque and improving wear resistance.
5. The axial clearance between the outer and inner core barrels is easy to be adjusted.
6. In case the tool is stuck, the safety joint allows the inner barrel and core in it to be pulled out of the hole while leaving the outer barrel in the hole. Fishing the outer barrel out of the hole becomes easy.
7. Complete set of ancillary tools is provided to simplify coring procedures, saving a lot of preparation time.