In fact, the operator was not sure how much of the fluid level would be decreased by increasing the casing pressure and did not intend to cause the dry condition for the pump.
Due to the HPHT cycles experienced in the process of hydraulic fracturing, production and steam injection, the failure probability of low cycle cement fatigue is high in these wells and is likely to cause the failure of the zonal isolation and increase the casing failure probability.
In this case, the operator faces two options, depending on the fluid level in the casing: (i) increasing pump speed with adjusting casing pressure and (ii) increasing pump speed without adjusting the casing pressure.
Decreasing the distance between the electrode and the casing increases the value of capacitance.
The bandwidth of the antenna element increases, if the casing also resonates at operating frequency.
The operator could have increased the casing pressure before increasing the pump speed.
Under different eccentric orientations, the von Mises stress in the casing increases with increasing degree of eccentricity.
For limitation of the API model, the ISO collapse strength model with manufacturing imperfections has been proposed, which improves the casing strength calculation accuracy and increases the benefits for casing strength design, rather than just using API model.
Gravel packs, screens, and wire-wrapped casings increase the skin factor that is contrary to CHOPS that decreases the skin factor by forming wormholes.
