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In the oil and gas production process in deep-water high-temperature–high-pressure (HT–HP) wells, the occurrence of wellhead uplift is often induced by the heat carried by oil and gas flow from the well bottom to the wellhead. This directly leads to the seal failure of wellhead device, causing the great potential safety hazard. Therefore, the wellhead uplift needs to be studied in cementing designing. The calculation model for the wellbore temperature and pressure field as well as the wellhead uplift height was established, we have developed a wellhead uplift experimental device, and experiments for the wellhead uplift under different working conditions were conducted. It was found that the increase of wellbore temperature and trap pressure cause the wellhead uplift, the calculation error of model is less than 10% compared with the experimental data. This could be used to predict the wellhead uplift height under different working conditions. It has certain guiding significance for cementing optimization and improvement of the wellhead integrity.

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Copyright of China Petroleum Machinery is the property of China Petroleum Machinery Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)