Directional Drilling Attitude Control With Input Disturbances and Feedback Delay

Inyang, Isonguyo J.; Whidborne, James F.; Bayliss, Martin T.

doi:10.1016/j.ifacol.2017.08.246

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…The financial well-being of hundreds and thousands of families depends on the success of each player in this market. With each new or first-time applied technology on this market [ 4 ], the efficiency of resource costs, the safety of human lives, the birth of new hypotheses, new professionals, new scientists are growing. We can consider this model from a million angles of view, but it is of particular interest in a period of unstable equilibrium, when it needs to self-organize, become self-reliant, independent, give up excesses and devote all efforts to improving efficiency.…”

Section: Methodsmentioning

confidence: 99%

New Reality of Directional Drilling Services During Production Decline and Coronavirus Pandemic

Zhivaeva

Lukyanov²

2020

Lecture Notes in Networks and Systems

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The year 2020 introduced unexpected critical structural changes into a rather conservative sector of drilling services. In a situation where the confirmed volumes of work are unpredictably transferred, postponed, halted, or re-negotiated, the leaders of high-tech service companies providing technical and technological support for oil and gas drilling, had to make a number of strong-willed decisions in order to continue to support the telemetry equipment fleet and retain a team of engineers by staying in the market. Of course, there are those who are not ready for this. In this article, we will look at the technical side of this reboot through a careful optimization of resources used by drilling service companies.

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Section: Methodsmentioning

confidence: 99%

New Reality of Directional Drilling Services During Production Decline and Coronavirus Pandemic

Zhivaeva

Lukyanov²

2020

Lecture Notes in Networks and Systems

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“…Both of which are low bandwidth and high latency. Automated tool face control has been attempted, however, the long latency (1 to 20 seconds) of downhole telemetry has made automatic feedback control significantly slower than manual control [4,5]. Target zones for current wells are often thin (5 to 30 meters thick) layers of reservoir or source rock for hydrocarbons and precise placement of wells is critical for economic production of the insitu hydrocarbon.…”

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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Sensing and computational frameworks for improving drill-string dynamics estimation

Auriol

Kazemi

Niculescu

2021

Mechanical Systems and Signal Processing

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In this paper, we consider the axial motion of a directional multi-sectional drill-string. The drillstring dynamics are represented by a distributed dynamical model (wave equations) coupled with an ordinary differential equation at the downhole boundary (bit-rock interaction). The interaction between the drill-bit and rock can introduce severe vibrations in the drill-string and result in safety and performance issues. Consequently, the performance of drilling is interwoven with our knowledge of the subsurface. To address these problems, we propose a sensing and computational framework for estimating the drill-string dynamics and the specific intrinsic energy of the rocks while drilling. By exploiting the derived models' particular structure, we combine the drill-string dynamics modeling with top-drive hook-load (force) and hook-speed (velocity) measurements to estimate the force-on-bit without requiring the knowledge of the sub-surface. Then, we record and model the seismic radiation patterns of drill-bit rock interactions near the surface (i.e., seismic while drilling). Such an idea allows deriving an appropriate estimation of the rocks' intrinsic energy while drilling. We introduce two alternative rock property estimation algorithms based on direct parameter estimation and machine learning concepts to complete the analysis. The different approaches are tested and validated in simulations. We discuss their respective advantages and drawbacks. Finally, we show how to extend our methodologies in the presence of non-linear Coulomb friction terms and of coupled axial-torsional oscillations.

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Directional Drilling Attitude Control With Input Disturbances and Feedback Delay

Cited by 5 publications

References 16 publications

New Reality of Directional Drilling Services During Production Decline and Coronavirus Pandemic

New Reality of Directional Drilling Services During Production Decline and Coronavirus Pandemic

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

Sensing and computational frameworks for improving drill-string dynamics estimation

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