Development drilling

What is Development drilling?

Development drilling meaning Drilling done to determine more precisely the size, grade, and configuration of an ore deposit subsequent to when the determination is made that the deposit can be commercially developed. Not included are:

  1. secondary development drilling,
  2. solution-mining drilling for production,
  3. or

  4. production-related underground and open pit drilling done for control of mining operations.


reference: Glossary – U.S. Energy Information Administration (EIA)