دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a nonionic polymer (polyacrylamide) used in flocculation, clarifying and even gelling acids and other brines. Very stable, but difficult to effectively break.

n: see breaking strength.

n: The process in which the bit continually breaks the formation and deepend the wellbore. It is controled by the driller who operates the brake crank and set down the drilling string to keep definite weight on bit.

n: Breaks at different joints in turn in order to check every joint periodically and avoid joint galling and thread fracturing.

n: a device that secures, or fastens, equipment. In producing wells with sucker rod pumps, a gas anchor is a special section of perforated pipe installed below the pump. It provides a space for gas to break out of the oil. In offshore drilling, floating drilling vessels are often secured over drill sites by large anchors like those used on ships. For pipelines, a device that secures pipe in a ditch.

n: Means of holding the deadline to the derrick or substructure. Usually this is the primary element of the weight indicator

a device with slips that holds equipment in the wellbore.

n: one type of misalignment in a chain-and-sprocket drive. The shafts are not parallel to each other (they form an angle) in either the horizontal or the vertical plane. This pulls the link plates on one side tighter than those on the other side;thus, one side of the chain and sprockets wears faster than the other. Link plates on only one side of the chain break because of fatigue.

n: a corrosion-resistant metal case in which a glass-stem thermometer can be placed to minimise the risk of breakage.

v: to spray a liquid through a restricted opening, causing it to break into tiny droplets and mix thoroughly with the surrounding air.

n: see breakout cathead, cathead. makeup cathead.

n: The general form of address of mechanized cathead. Used for winding wire line automatically and draw the tongs to make up and breakout.