(drill stem)
91National oil company — A national oil company (NOC) is an oil company fully or in the majority owned by a national government. According to the United States Energy Information Administration, NOCs accounted for 52% global oil production and controlled 88% of proven… …
92Oil and Natural Gas Corporation — Limited Type State owned enterprise Public Traded as NSE:  …
93Extraction of petroleum — Pumpjack on an oil well in Texas The extraction of petroleum is the process by which usable petroleum is extracted and removed from the earth. Contents 1 …
94Drilling fluid invasion — is a process that occurs in a well being drilled with higher wellbore pressure than formation pressure. The liquid component of the drilling fluid (known as the mud filtrate) continues to invade the porous and permeable formation until the solids …
95CGGVeritas — Compagnie Générale de Géophysique Veritas S.A. Type Société Anonyme Traded as Euronext:  …
96Mitigation of peak oil — The standard Hubbert curve, plotting crude oil production of an oil well or oil field over time …
97Prudhoe Bay Oil Field — Prudhoe Bay oil field …
98Steam injection (oil industry) — Steam injection is an increasingly common method of extracting heavy oil. It is considered an enhanced oil recovery (EOR) method and is the main type of thermal stimulation of oil reservoirs. There are several different forms of the technology,… …
99Completion (oil and gas wells) — This article is about the oil or gas well completion. For other uses of completion, see Completion (disambiguation) In petroleum production, completion is the process of making a well ready for production (or injection). This principally involves …
100Wood Group — John Wood Group PLC Type Public limited company Traded as LSE:  …
