دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

proved plus probable reserves.

proved, probable plus possible reserves.

a failure mode that can cause the cancellation-of or immediate-halt-to a project or event. Generally expressed as a percent probability.

n: a method of joining steel components in which acetylene gas and oxygen are mixed in a torch to attain the high temperatures necessary for welding. As an early type of welding (it was also called oxyacetylene welding),its primary disadvantage was the seepage of molten weld material onto the interior surface of the pipe, often leading to corrosion problems.

adj: requiring free atmospheric oxygen for normal activity.

bacteria that require oxygen to survive and multiply.

n pi: bacteria that require free oxygen for their life processes. Aerobic bacteria can produce slime or scum, which accumulates on metal surfaces, causing oxygen-concentration cell corrosion.

n: a method of rotary drilling that uses compressed air as the circulation medium. The conventional method of removing cuttings from the wellbore is to use a flow of water or drilling mud. Compressed air removes the cuttings with equal or greater efficiency. The rate of penetration is usually increased considerably when air drilling is used;however, a principal problem in air drilling is the penetration of formations containing water, since the entry of water into the system reduces the ability of the air to remove the cuttings.

n: A method of rotary drilling that uses compressed air as the circulating medium.

drilling with air instead of drilling mud (requires diverters at the surface to handle cuttings and formation fluids).

adj: active in the absence of free oxygen.

bacteria that can survive and multiply without oxygen.