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...

ring known as the mitral annulus.[citation needed] The anterior cusp attaches to one third of the circumverence of the annulus, and the posterior cusp...

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...

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

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...

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...

often the tidiest way of making a planned well kill. It involves pumping kill fluid down the 'A' annulus of the well, through a point of communication between...

the annulus ring, eventually rupturing the sporangial wall by ripping apart thin-walled lip cells on the opposite side of the sporangium. The annulus slowly...

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...

mathematics, the annulus theorem (formerly called the annulus conjecture) states roughly that the region between two well-behaved spheres is an annulus. It is closely...

and the 'A' annulus. They are often used in multiple reservoir wells to regulate flow to and from the zones. The packer isolates the annulus between the...

tubing is therefore installed inside the last casing string and the tubing annulus is usually sealed at the bottom of the tubing by a packer. Tubing is easier...

z ) {\displaystyle f(z)} will then be valid anywhere inside the annulus. The annulus is shown in red in the figure on the right, along with an example...

The right fibrous ring is known as the annulus fibrosus dexter cordis, and the left is known as the annulus fibrosus sinister cordis. The right fibrous...

regions of the annulus. Increased rotation speed is one of the best methods for increasing hole cleaning in high-angle and horizontal wells. One of the functions...

the annulus to stop the flow of fluids out of the wellbore. Denser mud is then circulated into the wellbore down the drill string, up the annulus and...

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...

Maximum Allowable Annulus Surface Pressure is an absolute upper limit for the pressure in the annulus of an oil and gas well as measured at the wellhead...

perforations. As the gas-laden fluid enters the well bore through the perforations, the gas bubbles up the annulus (the space between the casing and the tubing)...

completely asymptomatic, or may require surgery. The limbus of fossa ovalis (annulus ovalis) is the prominent oval margin of the fossa ovalis in the right atrium...

{bh^{3}}{12}}+{\frac {hb^{3}}{12}}={\frac {bh}{12}}\left(b^{2}+h^{2}\right)} Consider an annulus whose center is at the origin, outside radius is r 2 {\displaystyle r_{2}}...

machine gun as vehicle armament. It could be fired in semi-automatic mode as well as fully automatic. It was introduced in British service in June 1940 and...

is transferred to the annulus, which may then develop fissures as a result. If the fissures reach the periphery of the annulus, the nuclear material can...

solution u might not have enough derivatives for the expression Lu to be well-defined in the classical sense. The elliptic regularity theorem guarantees...

defined as the flow of gas and/or liquid along the surface casing/casing annulus. GM is defined as a flow of gas that is detectable at the outer surface...

jade annulus") or Héshìzhībì (Chinese: 和氏之璧) using the Classical Chinese grammatical possessive affix zhī (之) was a Bì (Chinese: 璧, "jade annulus") or...

gilding-metal jacket. It had a plain tip and red lacquer around the primer annulus to indicate that it was standard Ball ammunition. The other was an armour...

with the sun gear as the output, and the annulus normally locked. A series of ball detents act on the annulus to lock it, allowing power to be transmitted...