A Paradigm in Rotary Steerable Drilling - Market Demands Drive a New Solution

Clegg, John Martin; Mejia, Camilo; Farley, Steve

doi:10.2118/194170-ms

Cited by 20 publications

(4 citation statements)

References 7 publications

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“…This eliminates the need for an operator to control the well by sliding a mud motor. Frequently, these systems use automated drilling modes in which Automatic wellbore steering by a closed-loop system programmed into the downhole tool [15]. RSS tools are categorized broadly in three types point-the-bit, push-thebit and Hybrid system.…”

Section: Rotary Steerable System (Rss)mentioning

confidence: 99%

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Drilling Optimization by Using Advanced Drilling Techniques in Buzurgan Oil Field

Al-hlaichi,

Al-Mahdawi,

Ali

2023

IJCPE

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Efficient and cost-effective drilling of directional wells necessitates the implementation of best drilling practices and advanced techniques to optimize drilling operations. Failure to adequately consider drilling risks can result in inefficient drilling operations and non-productive time (NPT). Although advanced drilling techniques may be expensive, they offer promising technical solutions for mitigating drilling risks. This paper aims to demonstrate the effectiveness of advanced drilling techniques in mitigating risks and improving drilling operations when compared to conventional drilling techniques. Specifically, the advanced drilling techniques employed in Buzurgan Oil Field, including vertical drilling with mud motor, managed pressure drilling (MPD), rotary steerable system (RSS), and expandable liner hanger (ELH), are investigated and evaluated through case study analyses, comparing their performance to that of conventional drilling techniques. The findings indicate that vertical drilling with mud motor exhibits superior drilling performance and wellbore verticality compared to conventional rotary drilling bottom hole assemblies (BHA) for drilling the 17 ½" hole section. MPD systems employed in the 12 ¼" hole section demonstrate safe drilling operations and higher rates of penetration (ROP) than conventional drilling methods. Rotary steerable systems exhibit reduced tortuosity and achieve higher ROP when compared to mud motor usage in the 8.5" and 6" hole sections. Lastly, investigations of expandable liner hanger cases reveal subpar cement quality in the first case and liner remedial work in the second case, highlighting the successful implementation of ELH techniques in the offset field. Overall, this paper highlights the advantages of utilizing advanced drilling techniques in Buzurgan Oil Field, showcasing their ability to mitigate drilling risks and enhance drilling operations when compared to conventional drilling approaches.

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Section: Rotary Steerable System (Rss)mentioning

confidence: 99%

“…These features lead to improved hydraulic, weight transfer during drilling, and drilling torque. Poor drilling efficiency may cause borehole instabilities in shale zones, resulting in lost time, equipment, and fluids [15]. Excessive torque and drag can be critical limitation during drilling horizontal oil wells.…”

Section: Rotary Steerable System (Rss)mentioning

confidence: 99%

Drilling Optimization by Using Advanced Drilling Techniques in Buzurgan Oil Field

Al-hlaichi,

Al-Mahdawi,

Ali

2023

IJCPE

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“…Meanwhile torque is applied to rotate the bit, the rock is crushed and cutters move ahead. Turbines and Positive Displacement Motors (PDM) can be used right above the bit, providing additional rotational speed by using hydraulic energy to turn the shaft (Clegg, J., 2019).…”

Section: Drilling Operationsmentioning

confidence: 99%

New Industry Standards to Increase the Reliability of Drilling Operations

Amorim

Santos

Azevedo

2019

HOLOS

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Design engineers select drilling bits based on their professional experience and knowledge about the area of the upcoming wells. Due to the absence of widely accepted algorithms for this task, diverse performance projections can come out if prepared by different persons. By selecting bits to withstand ranges of parameters similar to the used in offset wells, less failures and longer runs can be expected. In deeper wells, a slow increase in the modes of string harmonics makes well planning complex, becoming crucial for the endurance of drilling bits to avoid resonance. Two new standards are proposed to the Oil & Gas industry in this article, created to make well planning more effective and to increase safety in selecting drilling parameters at the rig. An environment of higher drilling efficiency will result in more reliable operations and lower operational costs. RESUMO Engenheiros de projetos selecionam brocas para poços vindouros baseados em sua experiência profissional e o conhecimento da área. Devido à ausência de algoritmos de aceitação geral para essa tarefa, diferentes profissionais terminarão por produzir projetos diferentes. Ao selecionar brocas adequadas para suportar parâmetros similares aos utilizados nos poços de correlação, trechos mais longos e menos falhas podem ser esperados. À medida que os poços se aprofundam há um lento incremento no número de harmônicos de vibração da coluna de perfuração, o que torna projetos de poço ainda mais complexos, sendo crucial para a sobrevivência das brocas evitar a ressonância. Nesse artigo dois novos padrões são propostos para a indústria de petróleo, criados para tornar um projeto de poço mais efetivo, bem como aumentar na sonda a segurança na seleção de parâmetros adequados. Um sistema de perfuração mais eficiente deverá produzir operações mais seguras, confiáveis e de menor custo operacional.

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“…These tools usually have embedded closed loop feedback control systems and deliver smooth and precise wellpaths. However, these tools are often prohibitively expensive for low margin or low cost operations, are not capable of delivering high turn rates and are prone to failure but remain in development [3]. In the second class, a bent downhole mud motor is used.…”

Section: Introductionmentioning

confidence: 99%

Closed-loop tool face control with the bit off-bottom

Auriol

Shor

Aarsnes

et al. 2020

Journal of Process Control

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In this paper, we develop three methods to achieve reliable closed-loop, tool face control for directional drilling operations. This is a necessary step to achieve closed-loop, automated directional guidance. Our algorithms combine existing industry top-drive controllers with new control approaches. The torsional model we use for the drill string has been field validated and takes into account the Coulomb friction between the drill string and the borehole. These distributed friction terms are either assumed known (or measured) or can be estimated using a state-observer. In this work, we improve such a state-observer to obtain an estimation of the tool face orientation in real-time. We then propose different approaches to control the tool face. The first method is based on a feed-forward control law. It uses the flatness of the model and the estimation of the orientation to generate an admissible trajectory which is then tracked. In the second procedure, we require a stable rotation off-bottom before smoothly changing the reference to zero to stop bit rotation. This change of reference induces a change of orientation that can be estimated and finally compensated by repeating the procedure. Finally, the last method uses a series of trapezoidal setpoint inputs-bumps-to calculate the change in downhole tool face per change in surface orientation before arriving at the correct tool face after three iterations. These three algorithms are illustrated in simulations of field scenarios and their effectiveness and limitations, depending on the reliability and availability of downhole orientation data, are discussed.

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A Paradigm in Rotary Steerable Drilling - Market Demands Drive a New Solution

Cited by 20 publications

References 7 publications

Drilling Optimization by Using Advanced Drilling Techniques in Buzurgan Oil Field

Drilling Optimization by Using Advanced Drilling Techniques in Buzurgan Oil Field

New Industry Standards to Increase the Reliability of Drilling Operations

Closed-loop tool face control with the bit off-bottom

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