To increase the distance below a specified reference datum.
The tower-like structure that houses most of the drilling controls.
The phase in which a proven oil or gas field is brought into production by drilling production (development) wells.
(1)To bore a hole, Also see Drilling(2)An implement with cutting edges used to bore holes.
The using of a rig and crew for the drilling, suspension, completion, production testing, capping, plugging and abandoning, deepening, plugging back, sidetracking, redrilling or reconditioning of a well (except routine cleanout and pump or rod pulling operations) or the converting of a well to a source, injection, observation, or producing well, and including stratigraphic tests. Also includes any related environmental studies. Associated costs include completion costs but do not include equipping costs.
A drilling unit that is not permanently fixed to the seabed, e.g. a drillship, a semi-submersible or a jack-up unit. Also means the derrick and its associated machinery.
Natural gas composed mainly of methane with only minor amounts of ethane, propane and butane and little or no heavier hydrocarbons in the gasoline range.
A well which has proved to be non-productive.