Study on Lifting Efficiency of Cuttings in Return Line of Riserless Mud Recovery System

Li, Xin; Zhang, Jie; Zhao, Haili; Zhang, Meng; Sun, Xuefeng; Wang, Peigang

doi:10.1145/3386762.3386775

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…where ρ m is the density of drilling fluid, g/cm 3 ; ρ c is the density of cuttings, g/cm 3 ; C a is the cuttings concentration, dimensionless; h f is the formation depth, m.…”

Section: Pressure Fieldmentioning

confidence: 99%

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Untitled

2024

PPEJ

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The precise control of the annular pressure involves drilling safety and drilling cost, which have always been the focus of drilling engineering. In this paper, combined with the characteristics of the Riserless Mud Recovery (RMR) System, the calculation method of equivalent circulating density (ECD) and annulus pressure of the RMR system is proposed. According to the characteristics of the heat exchange of the RMR system, a mathematical model of the thermal field in the annular is established. The variation law of thermal field in the annular of some well sections was simulated by computational fluid dynamics (CFD) software. Comparing the CFD analysis results with the calculation results of mathematical models, the feasibility of the mathematical model is verified, and the temperature variation curve in the annulus is obtained. Based on the drilling data of a vertical well in the South China Sea, this paper analyzes the effects of seawater depth, equivalent static density (ESD) of drilling fluid, cuttings concentration, and discharge capacity on the annular pressure and ECD of the RMR system.

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“…where ρ m is the density of drilling fluid, g/cm 3 ; ρ c is the density of cuttings, g/cm 3 ; C a is the cuttings concentration, dimensionless; h f is the formation depth, m.…”

Section: Pressure Fieldmentioning

confidence: 99%

“…The limit water depth of riser used in offshore drilling engineering is 3,047m [1][2][3]. However, due to the impact force of seawater, the riser will vibrate at different frequencies, which makes it impossible for the riser to be used ideally in a deepwater environment [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2024

PPEJ

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“…Li et al [10] analyzed the effects of seawater depth, equivalent static density (ESD) of drilling fluid, drilling chip concentration, and discharge on the annular pressure and Appl. Sci.…”

Section: Introductionmentioning

confidence: 99%

Study of the Relationships among the Reverse Torque, Vibration, and Input Parameters of Mud Pumps in Riserless Mud Recovery Drilling

He,

Xu,

Chen

et al. 2023

Applied Sciences

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Compared with traditional deepwater drilling, riserless mud recovery (RMR) drilling technology has the advantages of improving drilling efficiency, reducing risks, and minimizing environmental effects. Therefore, RMR drilling technology has been widely applied in recent years. This study primarily investigates the relationships among reverse torque, vibration, and input parameters of mud pumps in riserless mud recovery drilling. Firstly, the operating principle and the structure of the mud pump module are analyzed, and an analytical model for the reverse torque and the vibration of the mud pump is established. Secondly, relevant data are derived from theoretical calculations and experiments, and the relationships among the reverse torque, vibration, and input parameters of the mud pump are analyzed using ANSYS (Version 2020 R1) software. Furthermore, the SVR (support vector regression) algorithm is employed to predict and analyze the amplitude of the mud pump’s vibration. Finally, the conclusions are drawn based on the findings of the relationships among the reverse torque, vibration, and input parameters of the mud pump. The findings show that the reverse torque of the mud pump increases approximately linearly with an increase in rotational speed, and the vibration of the mud pump increases and then decreases with an increase in rotational speed. The predicted values obtained through the prediction algorithm closely match the actual values. The findings provide a valuable reference for the application of RMR technology.

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Research on dynamic well control in riserless mud recovery system

Mao,

Zhang

2025

Process Safety and Environmental Protection

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Study on Lifting Efficiency of Cuttings in Return Line of Riserless Mud Recovery System

Cited by 5 publications

References 7 publications

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Study of the Relationships among the Reverse Torque, Vibration, and Input Parameters of Mud Pumps in Riserless Mud Recovery Drilling

Research on dynamic well control in riserless mud recovery system

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