Making changes to the drilling parameters in order to send information to the tools generally interrupts the drilling process, causing lost time.

Specifying equipment, material and ratings and grades to be used in the drilling process.

Providing technical support and audit during the drilling process.

The formation may also be under-pressurized, further complicating the drilling process.

The drilling process itself occurs in phases.

In 1859, Edwin Drake of Pennsylvania invented a drilling process to extract oil from deep within the earth.

The hole is only drilled part way into the workpiece because it is only used to guide the beginning of the next drilling process.

The drilling process was expected to last five days and would be followed by a rapid sampling operation.

Fluids introduced during the drilling process are called drilling fluids.

Casing that is cemented in place aids the drilling process in several ways: