(drill stem)
41Underbalanced drilling — Underbalanced drilling, or UBD, is a procedure used to drill oil and gas wells where the pressure in the wellbore is kept lower than the fluid pressure in the formation being drilled. As the well is being drilled, formation fluid flows into the… …
42Hydrocarbon exploration — Onshore Drilling Rig Hydrocarbon exploration (or oil and gas exploration) is the search by petroleum geologists and geophysicists for hydrocarbon deposits beneath the Earth s surface, such as oil and natural gas. Oil and gas exploration are… …
43Peak oil — A logistic distribution shaped production curve, as originally suggested by M. King Hubbert in 1956 …
44Core sample — Rock core samples. The product of a Diamond rig. (The bird is a Pied Butcherbird.) A core sample is a cylindrical section of (usually) a naturally occurring substance. Most core samples are obtained by drilling with special drills into the… …
45Deep Sea Drilling Program — Glomar Challenger The Deep Sea Drilling Project (DSDP) was an ocean drilling project operated from 1968 to 1983. The program was considered to be successful as evidenced by the data and publications that have resulted from it and is now supported …
462000s energy crisis — This article is about the causes and analysis of the relatively high oil prices of the 2000s. For discussion of the effects of the crisis, see Effects of the 2000s energy crisis. For a chronology of oil prices during this time, see 2003 to 2011… …
47Drilling engineering — is a subset of petroleum engineering. Drilling engineers design and implement procedures to drill wells as safely and economically as possible. They work closely with the drilling contractor, service contractors, and compliance personnel, as well …
48History of the petroleum industry in Canada — The Canadian petroleum industry arose in parallel with that of the United States. Because of Canada s unique geography, geology, resources and patterns of settlement, however, it developed in quite different ways. The evolution of the petroleum… …
49Project Mohole — Mohole redirects here. Moholes are also features in the Mars trilogy. CUSS I Underseas beacons for positioning by …
50Differential sticking — A diagram showing forces at work during differential sticking. The small black arrows represent pressure exerted on the drill pipe from the wellbore, the red arrows represent pressure exerted on the pipe from the formation (smaller than in the… …
