دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

Injection of fluids down the annulus or “backside”. Common as a gas supply path for gas lift. Also used in some fracturing operations, to spot fluids downhole when no packer is used or a type of injection valve is in the tubing to allow entry of chemicals

n: pressure produced parallel with the cylinder axis when casing hits a deviation in the hole or a sticky spot and stops. The force pushing down on the pipe causes axial compression.

n: a long, cylindrical container fitted with a valve at its lower end, used to remove water, sand, mud, drilling cuttings, or oil from a well in cable-tool drilling.

n: A long, cylindrical container, fitted with a valve at its lower end, used to remove water, sand, mud, oil, or junk and debris from a well.

a hollow tube with a trap door or ball seat, run on wireline, which can be used to spot or remove solid material from a well bore.

a test technique using an injected solution of borax and a detection tool to spot channels.

n: a spot sample of free water taken from beneath the petroleum contained in a ship or barge compartment or a storage tank.

n: a seismic phenomenon that shows up on a seismic, or record, section as a sound reflection that is much stronger than usual. A bright spot sometimes directly indicates natural gas in a trap. See record section.

a specific seismic reflection that may indicate gas.

a log that measures the ratio of carbon-to-oxygen within the formation. Useful for spotting oil.

n: in tank sampling, a spot sample taken 4 inches (100 millimetres) below the level of the tank outlet.

n: a sample of a substance that is made up of equal portions of two or more spot samples obtained from a tank or pipeline. In a crude oil storage tank, one type of composite sample is taken at the top, at the bottom, and in the middle.

n: in tank sampling, a blend of spot samples mixed in equal proportions for testing.