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...

Look up annulus in Wiktionary, the free dictionary. Annulus (or anulus) or annular indicates a ring- or donut-shaped area or structure. It may refer to:...

shaped like a ring or a hardware washer. The word "annulus" is borrowed from the Latin word anulus or annulus meaning 'little ring'. The adjectival form is...

fibrous ring known as the mitral annulus. The anterior cusp attaches to one third of the circumverence of the annulus, and the posterior cusp attaches...

the formation pressure and the HSP in the annulus when a kick occurs. The pressures encountered in the annulus can be estimated using the following mathematical...

weight of brine on either side. To protect well integrity, each annulus will have a Maximum Allowable Annulus Surface Pressure. This refers to the integrity...

constructed casing seal, contaminated fluid can travel into the well through the casing annulus. Centering devices are important (usually one per length of...

natural gas, and/or water) can begin to flow into the wellbore and up the annulus (the space between the outside of the drill string and the wall of the...

formation fluids to enter the annulus uncontrollably. The drill string to which the bit is attached is gradually lengthened as the well gets deeper by screwing...

the pipe and annulus. Atmospheric pressure can be omitted since it works the same on both columns. If the fluid in both the pipe and annulus are of the...