Well

Well
is a mining tunnel of a round hole in diameter many times less than its length, which is formed in a rock mass by means of drilling and casing without people access with a pre-designated 3D position. The upper part of a well is called a wellhead, the bottom – a downhole, the side surface – a wellbore wall. Rock particles formed during wellbore progressing are called cuttings. The distance from the wellhead to the downhole along the wellbore axis determines a well length. The length of the vertical axis projection determines a well depth.
During exploration as well as for production of liquid and gaseous underground resources in the Earth crust rock mass, small diameter and considerably long cylindrical holes are made, which are called drilling wells. Drilling wells are made both from the surface and subsurface tunnels. They may have various dimensional forms (linear, spiral) and directions (upward, downward, horizontal, inclined).

Glossary of Oil and Gas. 2013.

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  • Well — Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la; originally… …   The Collaborative International Dictionary of English

  • Well to do — Well Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la;… …   The Collaborative International Dictionary of English

  • Well — Well, n. [OE. welle, AS. wella, wylla, from weallan to well up, surge, boil; akin to D. wel a spring or fountain. ????. See {Well}, v. i.] [1913 Webster] 1. An issue of water from the earth; a spring; a fountain. [1913 Webster] Begin, then,… …   The Collaborative International Dictionary of English

  • well — well1 [wel] n. [ME welle < OE wella, akin to weallan, to boil up, akin to Ger welle, wave, wallen, to boil < IE base * wel , to turn, roll > WALK, L volvere, to roll] 1. a flow of water from the earth; natural spring and pool 2. a hole… …   English World dictionary

  • Well — is an English adverb with irregular comparison. Well may also refer to:* Water well, an artificial excavation or structure for the purpose of withdrawing water * Oil well, a hole drilled through the Earth s surface for the purpose of extracting… …   Wikipedia

  • well — Ⅰ. well [1] ► ADVERB (better, best) 1) in a good or satisfactory way. 2) in a condition of prosperity or comfort. 3) in a favourable or approving manner. 4) in a thorough manner. 5) …   English terms dictionary

  • Well — Well, a. [1913 Webster] 1. Good in condition or circumstances; desirable, either in a natural or moral sense; fortunate; convenient; advantageous; happy; as, it is well for the country that the crops did not fail; it is well that the mistake was… …   The Collaborative International Dictionary of English

  • Well — bezeichnet eine Vertiefung in einer Mikrotiterplatte Well ist der Familienname folgender Personen: Günther van Well (1922–1993), deutscher Diplomat und Staatssekretär Roman Well (eigentlich Ruvelis Leiba Sobolevicius, später Robert Soblen;… …   Deutsch Wikipedia

  • well — well, well There is much uncertainty about whether forms such as well( )made and well( )received should contain a hyphen or be spelt as two words. The normal rule is that the combination is hyphened when it occurs in attributive position (i.e.… …   Modern English usage

  • well- — well, well There is much uncertainty about whether forms such as well( )made and well( )received should contain a hyphen or be spelt as two words. The normal rule is that the combination is hyphened when it occurs in attributive position (i.e.… …   Modern English usage

  • well — [wel] noun [countable] another name for an oil well * * * well UK US /wel/ noun [C] ► NATURAL RESOURCES a deep hole in the ground from which you can get water: »These two tributaries of the Yellowstone River supply water for farms and wells in… …   Financial and business terms

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