Why Do We Keep Cement Samples? Cement samples are kept after pumping cement in oil well operations for several important reasons: Quality control: To verify the quality of the cement slurry and ensure that it meets the required specifications. Troubleshooting: To investigate any problems with the cement job and determine the cause of the problem. Guidance for next drilling section: To roughly determine if the cement downhole has set before proceeding with the next drilling operation. Long-term p