دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The alternation characteristic of cut point when the cyclone works under different operating pressure.

v: to lower the drill stem rapidly a few feet into the hole and then stop it suddenly with the drawworks brake. A surge of pressure in the mud in the drill stem and annular space results and may help to flush out debris accumulated in or on die pipe. The pressure surge may break down a formation, however, causing lost circulation, or may damage the bit if it is near the bottom.

v: Landing the drill string speedily and then braking. This operation can produce stiring pressure to clean the cutting laying up in the drill pipe. But this pressure may lead to formation fracturing or circulation loss.

n: an agreement for the acquisition of mineral rights (i.e., oil and gas leases) in a checkerboard pattern of alternate tracts, usually beginning, in the case of farmouts, with the drill site tract.

n: The method of measuring content of chemical of drill fluid filter with chemical manner.

n: a method of severing steel pipe in a well by applying high-pressure jets of a very corrosive substance against the wall of the pipe. The resulting cut is very smooth.

sediment formed by precipitation from water, e.g., salt from dehydration and scales.

n: the holding of formation rock chips in place as a result of high differential pressure in the wellbore (i.e., pressure in the wellbore is greater than pressure in the formation). This effective- its the cutting action of the bit by retarding circulation of bit cuttings out of the hole.

n: A kind of inorganic salt containing chlorine.

n: a greenish-yellow, acrid gas (CI) that irritates the skin and mucous membranes and causes breathing difficulties. chlorine log n: a record of the presence and concentration of chlorine in oil reservoirs. See chlorine survey.

n: a special type of radioactivity- logging survey used to measure die relative amount of chlorine in the formation. Rocks with low chlorine content are likely to contain gas or oil;rocks with high chlorine content usually contain salt water only.

n: See salinity logging.