Portuguese term
United States
Interpreter/translator, Trimedica member
Native in: Spanish
Works in: English to Spanish, Spanish to Portuguese, German to Portuguese, and 15 more.
Circulação
| 4 | circulation |
Gilmar Fernandes
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Mar 3, 2016 09:38: Joao Marcelo Trovao changed "Level" from "PRO" to "Non-PRO"
PRO (3): Gilmar Fernandes, Matheus Chaud, T o b i a s
Non-PRO (3): Mario Freitas, Salvador Scofano and Gry Midttun, Joao Marcelo Trovao
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Proposed translations
United States
25 + yrs. Business experience PORT- ENG
Native in: Portuguese 
, English
Works in: Portuguese to English, English to Portuguese
circulation
https://www.osha.gov/SLTC/etools/oilandgas/glossary_of_terms...
circulation
n: the movement of drilling fluid out of the mud pits, down the drill stem, up the annulus, and back to the mud pits. See normal circulation, reverse circulation.
https://en.wikipedia.org/wiki/Casing_(borehole)#Cementing
Cementing is performed by circulating a cement slurry through the inside of the casing and out into the annulus through the casing shoe at the bottom of the casing string. In order to precisely place the cement slurry at a required interval on the outside of the casing, a plug is pumped with a displacement fluid behind the cement slurry column, which "bumps" in the casing shoe and prevents further flow of fluid through the shoe. This bump can be seen at surface as a pressure spike at the cement pump. To prevent the cement from flowing back into the inside of the casing, a float collar above the casing shoe acts as a check valve and prevents fluid from flowing up through the shoe from the annulus.
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