The Effect of Pipe Rotation on Dynamic Well Control Surface Pressure Using Single Bubble Model
- Zahrah Al Marhoon (University of Oklahoma) | Hussain Al Ramis (University of Oklahoma)
- Document ID
- International Petroleum Technology Conference
- International Petroleum Technology Conference, 26-28 March, Beijing, China
- Publication Date
- Document Type
- Conference Paper
- 2019. International Petroleum Technology Conference
- 1.7.5 Well Control, 1.7.2 Managed Pressure Drilling, 3 Production and Well Operations, 1.6 Drilling Operations, 1.7 Pressure Management, 2.1.3 Completion Equipment, 1.11 Drilling Fluids and Materials, 1.11.2 Drilling Fluid Selection and Formulation (Chemistry, Properties), 4.3.4 Scale
- MPD, Single Bubble, Well Control, pipe rotation
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With the recent advances of drilling technology, carrying a safe well-constructed design is very important especially implementing the well control strategy. Managed Pressure Drilling (MPD) is a new technology that has recently emerged in the industry. It has special well control capabilities supported by the RCD to simultaneously provide the required pressure control on a certain volume gas influx and maintain the pipe rotation for drilling or any required operation. This paper examines the effect of pipe rotation on casing pressure profiles during the circulation process of the kick using MPD equipment.
Data from real scale kick experiments conducted by the LSU Petroleum Engineering Research & Technology Transfer Laboratory (PERTT Lab) personnel was analyzed. These experiments were conducted in a controlled environment that mimicked downhole conditions with a gas influx entering the wellbore. Then, the experimental analysis was coupled with the effect of pipe rotation through the application of correlations. The correlations from literature show a change in the expected frictional pressure loss when comparing the rotating case to the non-rotating case. The estimate in the change of frictional pressure loss in the annulus for non-Newtonian fluids with pipe rotation was done using two different correlations. This change is then applied on the geometric configuration of the well to find the change in the surface casing pressure caused by rotation.
This paper covers the use single bubble model in WBM. The model examined the change on the surface pressure caused by frictional pressure loss from pipe rotation.
The results from the models showed that the changes in pressure is very small with a percentage change up to 8 %. These changes are only applicable to cases with similar mud properties and well design of the experiments.
The practical outcome is to further the understanding of a gas bubble behavior in a wellbore experiencing a kick situation. Since new technologies allow for the rotation of the pipe during the circulation process, this paper helps in answering the question of whether or not the pipe rotation aids to overall expected surface pressure. Furthering the window of applicability of the MPD can possibly touch into its unexploited potential.
|File Size||863 KB||Number of Pages||7|
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