Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Describing a method of
drilling forpetroleum in which thepressure in thewellbore is kept lower than that of theformation being drilled, thus allowing fluid to enter the well as soon as it is found
Etymologies
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Examples
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Orchestra balance is pretty good, but the double basses are considerably underbalanced and out of focus.
Gerald Sindell: The Third Golden Age Begins?: Welcome to the Berliner Philharmoniker 2009
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George, Warren had always been a little more than perfect, a machine of inspired surgery, underbalanced in many ways that in this one supreme way he might be more than human.
The Heart of Rachael Kathleen Thompson Norris 1923
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"By drilling underbalanced and using downholes motors, we have cut the average drilling time from 25 days to less than 20 days," said Mr. Mize.
TransAtlantic Petroleum Ltd. Announces Third Quarter 2010 Operations Update - Yahoo! Finance 2010
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Elsewhere in Saudi Arabia, Schlumberger Well Services completed a number of underbalanced coiled-tubing drilling (CTD) re-entries for Saudi Aramco.
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Production from the first wells demonstrated very promising results and based upon these successful applications, further underbalanced CTD wells are planned.
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The purchase of this facility was the result of successful drilling at Clairmont and Dimsdale, where one underbalanced horizontal (0.825 net) and one vertical (1.0 net) gas wells were drilled.
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SunTerra Resources LLC plans to use underbalanced horizontal drilling - a technique that's less expensive than conventional horizontal drilling.
Dallas Business News - Local Dallas News | Dallas Business Journal 2009
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Allis-Chalmers provides directional drilling services, casing and tubing services, underbalanced drilling, production and workover services with coiled tubing units, rental of drill pipe and blow-out prevention equipment, and international drilling and workover services.
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Production from the first wells demonstrated very promising results and based upon these successful applications, further underbalanced CTD wells are planned.
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The Saudi Aramco deep gas underbalanced drilling project utilizes coiled tubing to drill three multilateral legs from an existing production well in the Khuff-C formation.
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