دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a single bore-hole completion where there are distinct surface-to-zone tubing strings with isolation from each other.

n: see parallel tubing strings.

n: elevators arranged so that they are latched and unlatched from the side instead of in the middle. Compare center-latch elevators.

n: see gas lift mandrel. side tap n: the joining of another pipe to the main body of a pipeline.

n: A mineral composed of ferrous carbonate, FeCO3, and having 3.8 g/cm3 specific gravity. It is found as an accessory mineral in some shales and carbonate rocks and also in some barite and hematite ores. FeCO3 is readily soluble in acids and breaks down slow

iron carbonate.

v: to use a whipstock, turbodrill, or other mud motor to drill around broken drill pipe or casing that has become lodged permanently in the hole.

v: Binder GG, Carlton LA and Garrett RL: Evaluating Barite as a Source of Soluble Carbonate and Sulfide Contamination in Drilling Fluids, Journal of Petroleum Technology 33, no. 12 (December 1981): 2371-2376.

a second (or higher) attempt to drill a wellbore after the first wellbore has been junked. This saves re-drilling the top part of the hole but requires drop back to a smaller wellbore size in the sidetrack. Also can be a second wellbore.

a core sample removed from the open hole bore hole wall by an explosive device or rotary drilled with a small tool.

n: a coring technique in which core samples are obtained from the hole wall in a zone that has already been drilled. A hollow bullet is fired into the formation wall to capture the core and then retrieved on a flexible steel cable. Core samples of this type usually range from 1 to 13/16 inches (20 to 30 millimetres) in diameter and from 1 to 4 inches (20 to 100 millimetres) in length. This method is especially useful in soft-rock areas.

n: a device in which a neutron source and a detector are in a pad using the same hardware as the density log. The pad is pushed against the side of the borehole wall. The log measures porosity.

n: a logging device that is held firmly against the wall of the hole and that measures the porosity of a formation.