You are here : Home > Special Technology
Drilling coring technology


GWDC has developed various coring tools covering 10 technical series and 30 types to meet the requirements of drilling coring operation in unconsolidated formations, gravel formations, middle-hard and hard formations and coal beds. The technology has reached the leading position in China.

  • Coring in unconsolidated formation
  • GRP coring
  • Sealing coring
  • Pressure-unchanged sealing coring
  • Directional coring
  • Coring while drilling
  • Coring in high deviated wells and horizontal wells
  • Coring in wells with oversize diameter
  • Coring with middle or long barrels
  • Coring in broken formations

The coring markets cover 7 overseas countries and 13 oil fields in China, mainly includes Sudan, Iran, Chad, Liaohe, Jidong, Daqing, Jilin, and Changqing, with annual coring footage of 3000m.