Method corrects API bottomhole circulating-temperature correlations

Critical for properly designing cement slurries, drilling engineers must accurately predict bottomhole circulating temperatures (BHCT) during drilling and completion of oil and gas wells.A new approach corrects the American Petroleum Institute's (API) current BHCT correlations for surface-formation temperature (SFT) variations.The author suggests to the API Subcommittee 10 on well cements that it should not use a constant value for SFT to process field data for future revisions of BHCT correlations. Click here to enlarge imageDownhole temperature is an important factor affecting the thickening time of cement, rheological properties, compressive strength development, and set time.The ...

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