NWE 0.00% 5.6¢ norwest energy nl

The annulus of an oil well or water well is any void between any...

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    The annulus of an oil well or water well is any void between any piping, tubing or casing and the piping, tubing, or casing immediately surrounding it. It is named after the corresponding geometric concept.

    https://hotcopper.com.au/data/attachments/3625/3625359-38f3a5eca6990ca570df3422488e99c9.jpg

 
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