New Well Foundation Concept, As Used at a Norwegian Sea Well (Russian)

Sivertsen, Trond Eggen; Strand, Harald

doi:10.2118/149584-ru

Cited by 9 publications

(2 citation statements)

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“…The catheter is greatly shortened and integrated into the suction anchor to form a catheter suction anchor system, and the system is used to realize the penetration installation technology of the suction anchor to realize the construction of the surface layer. In order to solve the impact of the use of heavy-duty blowout preventers in deep polar water on the wellhead stability and to deal with emergencies such as drilling drift, the suction anchor surface well construction technology was first applied in the Norwegian Sea and the large cross-sectional area of the suction anchor conduit and the absorbed soil quality improved the overall wellhead bearing capacity and bending resistance (see Figure 14) [169]. The suction anchor surface well construction technology greatly shortens the well structure while providing sufficient bearing capacity and high installation efficiency, which can provide a stable operating environment for the drilling stage.…”

Section: Wellbore Integrity Assessmentmentioning

confidence: 99%

An Interface Parametric Evaluation on Wellbore Integrity during Natural Gas Hydrate Production

Zheng

Yang

Zhang

et al. 2022

JMSE

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Based on the whole life cycle process of the economic exploitation of natural gas hydrate, this paper proposes the basic problem of stabilizing the wellbore for the basic conditions that must be met to ensure the integrity of the wellbore for exploitation: revealing the complex mechanism of fluid–solid–heat coupling in the process of the physical exchange of equilibrium among gas, water, and multiphase sand flows in the wellbore, hydrate reservoir, and wellbore, defining the interface conditions to ensure wellbore stability during the entire life cycle of hydrate production and proposing a scientific evaluation system of interface parameters for wellbore integrity.

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Section: Wellbore Integrity Assessmentmentioning

confidence: 99%

An Interface Parametric Evaluation on Wellbore Integrity during Natural Gas Hydrate Production

Zheng

Yang

Zhang

et al. 2022

JMSE

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“…Faul et al proposed suction technology as an attractive alternative to current well construction methods of jetting, harming, drilling or post-drilling cementing, which could improve structural casing, foundation piles and caissons in deepwater, increase structural integrity and provide significant cost savings for deepwater projects and infrastructure construction [26]. Sivertsen and Strand proposed a new subsea shallow well construction method and presented the design idea of conductor suction pile [27]. Mathis et al applied suction pile well construction technology in shallow oil and gas reservoirs in Norwegian waters and achieved practical success [28].…”

Section: Introductionmentioning

confidence: 99%

Research on Lateral Load Bearing Characteristics of Deepwater Drilling Conductor Suction Pile

Li,

Yang,

Zhu

et al. 2024

Energies

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The vast reserves of natural gas hydrates in offshore areas present significant challenges to development. Surface well construction technology is crucial for the extraction of deepwater natural gas hydrates. To ensure the safety of the subsea wellhead during the drilling process for deepwater natural gas hydrates, a novel conductor suction pile device has been designed, comprising a combination of suction piles and surface conductors. And research has been conducted to investigate the lateral stability characteristics of the conductor suction pile. Drawing upon the pile foundation load-bearing theory and the equilibrium of the differential element, a theoretical analysis model and corresponding governing equations of the conductor suction pile system are established. A solution for a multi-point boundary value problem by simplifying the conductor suction pile system into a two-end free beam is proposed. The governing equations are then converted into a first-order differential equation system, and the four-stage Lobatto IIIa collocation method program for the multi-point boundary value problem is developed and resolved using MATLAB 2023a. Furthermore, a case study of a well in the South China Sea elucidates the effects of wellhead load and seabed soil properties on the lateral load-bearing capacity of the conductor suction pile system, verifying the collocation method’s validity against the results from the finite difference method. After conducting a comparative analysis of the lateral load-bearing performance between conductor suction piles and traditional surface conductors, it is observed that conductor suction piles exhibit lower horizontal displacement and bending moments compared to surface conductors. Therefore, conductor suction piles demonstrate a substantial safety margin. The research findings provide a theoretical basis for the lateral stability of conductor suction piles during deepwater natural gas hydrate drilling. This offers a safe and efficient method for surface well construction in the extraction of natural gas hydrates.

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Self-Weight Penetration Characteristics of the Suction Foundation with Different Diameters in Sand

Sun

Guo

et al. 2022

China Ocean Eng

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New Well Foundation Concept, As Used at a Norwegian Sea Well (Russian)

Cited by 9 publications

References 0 publications

An Interface Parametric Evaluation on Wellbore Integrity during Natural Gas Hydrate Production

An Interface Parametric Evaluation on Wellbore Integrity during Natural Gas Hydrate Production

Research on Lateral Load Bearing Characteristics of Deepwater Drilling Conductor Suction Pile

Self-Weight Penetration Characteristics of the Suction Foundation with Different Diameters in Sand

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