دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

the theoretical maximum flow that a well could deliver with a zero backpressure at the middle of the perforations.

a large, load supporting formation that may serve to reduce the total overburden load on a pay zone. These formations may cover hundreds of square miles over a basin. A second use is as a semi-stable structure of sand grains around a perforation or other

the flow area generated by perforations across a zone of interest. Typical calculated perforation entrance hole areas are 1% to 6% of the pipe body. Used in pressure drop calculations.

sudden backflow of a well, usually to clean the perforations.

n pi: balls made of nylon, hard rubber, or both and used to shut off perforations through which excessive fluid is being lost.

n: Made by nylon or ebonite. Used to block off the opening in the capital string and prevent fluid lossing when fracturing.

small, rubber-covered, hard centered balls that can seal individual perforations during a chemical treatment.

v: to plug open perforations by using ball sealers.

When using ball sealers, to effectively shut-off the entire zone and cause pressure to rise sharply.

n: casing without perforations.

n: a heavy wall sub placed in the tubing string opposite flowing perforations.

n: liner with no perforations. blank off v: to close off (as with a blank flange or bull plug).

n: pipe, usually casing, with no perforations.