Cwear Casing Wear Software //TOP\\ Download
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Casing wear is a continuous concern during the process of drilling and workover. Casing integrity relies highly on the preliminary casing design, which requires to consider both well path and casing sustainability to withstand all the operations. Improper placement of casing may end up in catastrophic incidents such as oil spills, blowouts or even the loss of a well. Remediation of casing failures can raise the field operation cost dramatically and be time-consuming.
CWPRO is integrated with multi-well sections, multi-operations, cumulated casing wear results and tool joint wear models. As a result of extensive research from experimental and theoretical perspective, CWPRO is developed to better understand the casing wear process, predict the location and magnitude of casing wear and give constructive suggestions.
Q1. Can the software calculate collapse strength of worn casings?Yes. For worn casings, a factor of the worn casing collapse strength to the new casing collapse strength will be calculated first. Then this factor will be used to obtain the collapse strength of the worn casing.
Q3. How does CWPRO deal with cumulative casing wear caused by different drill string operations?CWPRO is intelligent enough to handle complicated casing structures and abundant operations inside the casing. During each operation, the software would define the exposed area between a casing and a drill string to calculate the exact wear. Casing condition after one operation would be the initial condition for the next operation. Casing wear accumulates in the sequence of operations.
Q4. When to apply non-liner correction to wear calculation?The default casing wear calculation uses linear wear factor, meaning that casing wear increase linearly with time. But experiments have shown that the wear factor decreases with increasing wear depth and wear time. As casing wear increases, casing wear speed decreases and eventually stables when wear exceeds about 50%.If the casing wear result is small (less 5%), it is suggested to apply the non-liner correction. The illustration of this non-linear correction factor is shown below.
CWEAR is a DEA-42 casing wear model that accurately predicts casing wear throughout the well. The program is based on an Exxon model that assumes volumetric casing wear is proportional to the mechanical energy imparted to the casing by the rotating tool joint (White et al, 1987). A large DEA-42 database provides appropriate wear factors based on the abrasivity of the mud, abrasivity of the tool-joint hardmetal, and other factors. Several DEA-42 participants have credited the program with solving multi-million dollar casing wear problems. 2b1af7f3a8