CWPRO - Casing Wear Prediction
Casing wear during drilling and workover is an on-going concern. It will continue to have an impact on both well path and operation designs because it can cause catastrophic incidents such as oil spills, blowouts or even the loss of a well.
PVI has conducted studies on casing wear from both an experimental and theoretical perspective. As a result of extensive research, CWPRO has been developed to better understand the casing wear process and predict the location and magnitude of casing wear along a cased hole.
Through years of rigorous consulting and field-testing, CWPRO has become the most advanced, yet easy-to-use casing wear prediction software available in the industry. CWPRO reduces risks by identifying, controlling and preventing potential problems. The software allows necessary modifications on casing design and drilling parameters to be made before pumps are implemented.
- Survey tortuosity
- Land and offshore wells
- Drilling, back reaming and rotating operations
- Multiple wear factors
- Inclination sensitivity study for casing wear
- Non-liner correction on casing wear calculation
- Burst and collapse strengths of worn casing
- Pipe protector recommendation
- 2D/3D wear visualization
- Torque and drag
- US oil field, SI and customized units
- Multi-language: English, Spanish, Chinese, Russian and Portuguese
- White Paper
Q1. Can the program handle the collapse strength of special casing?
Yes. For special casing, a factor of the collapse strength of special casing to the collapse strength of the standard casing will be calculated. To calculate the collapse strength of the worn special casing, this factor will be applied to the calculated collapse strength of the worn standard casing.
Q2. How does the user select an appropriate wear factor?
Wear factor is affected by mud type, mud additive, whether lubricants are applied, casing interior, tool joint protector material if protectors are placed…
CWPRO provides suggested wear factor based on the joint-industry project, DEA-42.
User also can get the wear factor from the manufacturer if any wear factor reduction tool is placed.
CWPRO also can calculate the casing wear in three set of wear factors in one run to let user the take a look on the casing wear sensitivity.
Q3. How can cumulative casing wear be accounted for from different strings or operations?
Calculate the casing wear from the first operation and come back to the input window.
Before run the next operation, go to Initial Wear page, select “Worn acing” and click button “Insert”, then the calculated wear from previous operation will be filled in the initial wear table.
Q4. When to apply non-liner correction to wear calculation?
The normal casing wear calculation is based on linear wear factor, which cause the casing wear increase linearly with time. But experimental results have shown that the wear factor decreases with increasing wear depth and time. As casing wear increases, this casing wear speed decreases and eventually approaches a flat value when wear exceeds about 50%.
If the calculated casing wear is small (less 5%), it is suggested to apply the non-liner correction. It is suggested to apply it in one operation for the same casing.
The illustration of this non-linear correction factor is shown below.
- Microsoft Windows® 7, Windows® 8/8.1, Windows® 10
- 2010 or later
- Dual core processor, 1.4 GHz or faster
- 4 GB RAM
- 200 MB of free disk space for installation
- 1,280 x 768 display resolution with true color or higher with small font
- Setup file can be accessed from a download link or installation CD provided by PVI