Overview of rotary steerable system and its control methods

Zhang, Chi; Zou, Wei; Cheng, Ningbo

doi:10.1109/icma.2016.7558796

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…Generally, deflection takes place due to the flexible insertion characterized by lower bending and torsional rigidity. Similar assemblies were studied in [9][10][11][12][13][14]. However, in these works the subject matter was not equipped with geostationary whipstock, and it requires for decrease in cross section of drilling bit drive shaft.…”

Section: Fig 1: Bha With Geostationary Whipstockmentioning

confidence: 99%

Model of Bottom Hole Assembly with Rotary Steerable System

Nikitin*,

Ashcheulov,

Lozhechko

2019

IJITEE

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This article presents a static model of bottom hole assembly (BHA) with rotary steerable system (RSS). This model is aimed at estimation of control actions generated by RSS actuators upon drilling path definition. The model can be also applied for estimation of BHA strength properties.This article presents a static model of bottom hole assembly (BHA) with rotary steerable system (RSS). This model is aimed at estimation of control actions generated by RSS actuators upon drilling path definition. The model can be also applied for estimation of BHA strength properties.

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Section: Fig 1: Bha With Geostationary Whipstockmentioning

confidence: 99%

Model of Bottom Hole Assembly with Rotary Steerable System

Nikitin*,

Ashcheulov,

Lozhechko

2019

IJITEE

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“…Obviously, how to control the attitude of downhole tool for the track of the planned drilling trajectory plays an important role in directional drilling. With the development of rotary steering system (RSS) [3][4][5], real-time control of the downhole tool attitude becomes available. However, due to the factors like change of stratums and weighton-bit, the tracking error is unavoidably introduced and may lead to a spiral drilled trajectory along the planned one.…”

Section: Introductionmentioning

confidence: 99%

Observer‐based trajectory control for directional drilling process

Cai

Lai

et al. 2021

Asian Journal of Control

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This paper is concerned with observer-based trajectory control of directional drilling system with rotary steering devices. Since the trajectory orientation cannot be measured directly, most of the existing results implicitly assume that the trajectory orientation is equal to the measurement of orientation of the bottom hole assembly (BHA) or the drill bit, which would bring in certain control errors in practice. To avoid such control errors, in this paper, a trajectory control approach is established, which includes a state observer to estimate the trajectory orientation based on the measurement of the BHA orientation. Firstly, the relationship between the trajectory orientation and the BHA orientation is analyzed, and a trajectory evolution model is introduced according to the analysis. Secondly, based on this trajectory evolution model, a variable transformation technique is applied such that a trajectory tracking control problem is formulated. Thirdly, a feedback control strategy is devised based on the estimation of the trajectory orientation for trajectory tracking. Fourthly, stability analysis of the closed-loop system is discussed, and the design of the controller and state observer is done.

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“…With the growing demands of new oil and gas drilling technology, the traditional drilling equipment has difficulty in covering these demands. The rotary steerable system (RSS) is the latest technology that improves drilling accuracy and increases the rate of penetration [1,2].…”

Section: Introductionmentioning

confidence: 99%

Toolface Control Method for a Dynamic Point-the-Bit Rotary Steerable Drilling System

et al. 2019

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In the dynamic point-the-bit rotary steerable system (DPRSS), a high dynamic stiffness toolface control method is desired to ensure the stabilized platform traces the directional command accurately and quickly. A three-loop compound toolface control method using the Model-based Active Disturbance Rejection Control (MADRC) algorithm is presented, and a load torque estimator and an outer housing speed estimator are designed based on system model to obtain the external disturbances. The proposed toolface control method was verified by numerical simulation and DPRSS prototype testing, and its speed loop frequency responses are analyzed. The results reveal that this method is effective in disturbance rejection and robust against parameter uncertainties, and the MADRC shows better performance compared with the conventional ADRC and the proportional-integral (PI) controller. The proposed method has the potential to be used in harsh drilling conditions.

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Overview of rotary steerable system and its control methods

Cited by 16 publications

References 19 publications

Model of Bottom Hole Assembly with Rotary Steerable System

Model of Bottom Hole Assembly with Rotary Steerable System

Observer‐based trajectory control for directional drilling process

Toolface Control Method for a Dynamic Point-the-Bit Rotary Steerable Drilling System

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