A Realistic and Integrated Model for Evaluating Offshore Oil Development

Qiu, Rui; Li, Zhuochao; Zhang, Qin; Yao, Xin; Liao, Qi; Wang, Bohong

doi:10.3390/jmse10081155

Cited by 4 publications

(3 citation statements)

References 37 publications

(48 reference statements)

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“…When the extension distance ∆T is fixed, the displacement h required by the piston will increase with the increase in the cutter face angle α. (2) The increase in the tool face angle α will lead to the reduction in the tool cutting torque.…”

Section: Discussionmentioning

confidence: 99%

“…Since the 1960s, offshore oil production has developed rapidly around the world, and more and more offshore oil production facilities have been established [1,2]. However, the life of offshore oil facilities is usually about 20-50 years [3,4], according to the international practice of offshore oil production and development, and those facilities need to be dismantled if there is no other use for offshore oil and gas facilities after decommissioning [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Research on Offshore Casing Cutting of Hydraulic Internal Cutting Device

Sun,

Tian,

Jin

et al. 2024

JMSE

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A mechanical model for offshore casing cutting based on the field application of a mechanical cutting device in the South China is presented in this paper. The proposed model includes the calculation of the piston acting on the cutter and the calculation of the cutting torque and wellhead driving torque. The influence of structural parameters on cutting extension distance, cutting torque, wellhead driving torque, and the proportion of cutting torque to wellhead driving torque are analyzed. The required extension distance is related to piston displacement and cutter face angle, the cutter face angle and cutting depth (water depth) have obvious influence on the cutting torque and wellhead driving torque, and the drilling revolution affects the inertia torque and wellhead driving torque. Since the proportion of cutting torque to wellhead driving torque decreased with the increase in the cutting depth, we cannot determine whether the casing cutting is completed based on the sudden decrease in the wellhead driving torque with cutting depths greater than 800 m. The numerical simulation results of the cutting tool cutting the casing show that if the revolution speed is too high, the initial cutting melting of the casing may affect the cutting force, and it is recommended to increase the rake angle as much as possible within a certain range. The field example shows the limitation of judging casing cutting by a sudden drop in torque.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Research on Offshore Casing Cutting of Hydraulic Internal Cutting Device

Sun,

Tian,

Jin

et al. 2024

JMSE

View full text Add to dashboard Cite

show abstract

“…The production and proven reserves of global submarine oil have steadily increased [1]. After investigation, it was found that a quarter of global oil and 45% of exploitable resources are buried on the seabed [2]. Since 2000, submarine oil fields have accounted for 30% of global oil production.…”

Section: Introductionmentioning

confidence: 99%

A Deep-Sea Environment Simulated Test System for Subsea Control Modules, Part A: Prototype and Test

Shang,

Wang,

Han

et al. 2024

JMSE

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This paper proposes a version of the deep-sea environment simulated test system for subsea control modules to solve the problem of incomplete testing systems for electro-hydraulic subsea control modules. Based on the subsea control module test requirements specified in APISTD17F, the test system in this paper is a highly integrated system, including a test hydraulic power unit, a control module test bench, a signal simulator, an electronic test unit, an umbilical simulator, a high-pressure chamber, and an incubator. Firstly, the design indicators of the test system were determined by analyzing the various functions of the subsea control module and its working environment. Secondly, the design scheme for the test system was proposed, and a detailed design was carried out. Finally, a hydro-electrical subsea control module for the Bohai Sea was fully tested with this system, with tests including the qualification test and the factory acceptance test. The test results show that all parts of the test system coordinated well and have achieved the design indicators, and the test system can simulate the working environment and complete a land test. The effectiveness and feasibility of the test system have been verified through the test. By adopting this system, the risk of subsea control module failure can be minimized, laying the foundations for future research and improvement of subsea control module testing equipment.

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Research on the Enhancement of the Separation Efficiency for Discrete Phases Based on Mini Hydrocyclone

Liu

Zhao

Wang

et al. 2022

JMSE

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The economic and efficient treatment of mixed media in offshore produced fluids is of great significance to oilfield production. Due to the small space and limited load-bearing capacity of offshore platforms, some mature multiphase media separation processes in onshore oilfields are difficult to apply. Therefore, high-efficiency processing methods with small-occupied space are required. Mini hydrocyclones (MHCs) are a potential separation method due to their simple structure, small footprint, and high separation efficiency (especially for fine particles or droplets). However, for discrete phases with different densities and sizes, the enhancement rule of the separation efficiency of MHCs is not yet clear. In this paper, numerical simulation methods were used to study the separation performance of hydrocyclones with different main diameters (including conventional hydrocyclones (CHCs) and MHCs) for discrete phases with different densities and particle sizes. Results show that MHC has the optimal enhancement range for oil–water separation when oil-droplet sizes are 60–300 μm, while the optimal enhancement range for silica particle and water separation is 10–40 μm. For other droplet/particle size ranges, the efficiency enhancement effect of MHC is not obvious compared to conventional hydrocyclones. By calculating the radial force of particles in MHC and CHC, the reasons for the enhanced efficiency of MHC are theoretically analyzed. The pressure drop of MHC is higher than CHC under the same feed velocity, which can be improved by connecting CHC with MHC. Additionally, the fluid velocity test experiments based on particle image velocimetry (PIV) were carried out to verify the accuracy of the numerical simulations. This study clarified the scope of application of MHCs to different discrete phase types, in order to provide a basis for the precise application of MHCs.

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A Realistic and Integrated Model for Evaluating Offshore Oil Development

Cited by 4 publications

References 37 publications

Modeling and Research on Offshore Casing Cutting of Hydraulic Internal Cutting Device

Modeling and Research on Offshore Casing Cutting of Hydraulic Internal Cutting Device

A Deep-Sea Environment Simulated Test System for Subsea Control Modules, Part A: Prototype and Test

Research on the Enhancement of the Separation Efficiency for Discrete Phases Based on Mini Hydrocyclone

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