A Fundamental Model for Prediction of Hole Curvature and Build Rates with Steerable Bottomhole Assemblies

Pastusek, Paul; Brackin, Van; Lutes, Paul

doi:10.2118/95546-ms

Cited by 42 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to (17a), the lateral force at the bitF 0 is proportional to the bit tilt ψ. However, laboratory experiments show that the bit tilt ψ saturates [29,30]. In fact, the lateral force model at the bit is set-valued when the bit tilt saturates.…”

Section: Saturation Of the Bit Tiltmentioning

confidence: 99%

“…This model determines conditions leading to unstable oscillatory behavior, however, it is insufficient to predict steady-state borehole rippling and spiraling, since it does not account for essential nonlinearities. In [2,28], an extension of this model is given which incorporates a saturation of the bit tilt as observed experimentally [29,30]. The bit tilt is defined as the orientation difference between the bit and the borehole at the bit and is depicted in Figure 3 for the two-dimensional case.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Nonlinear dynamic modeling and analysis of borehole propagation for directional drilling

Shakib

Detournay

Wouw

2019

International Journal of Non-Linear Mechanics

View full text Add to dashboard Cite

DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

show abstract

Section: Saturation Of the Bit Tiltmentioning

confidence: 99%

mentioning

confidence: 99%

Nonlinear dynamic modeling and analysis of borehole propagation for directional drilling

Shakib

Detournay

Wouw

2019

International Journal of Non-Linear Mechanics

View full text Add to dashboard Cite

show abstract

“…Proprietary software is used along with an iterative field-trial process to develop the quietest BHA. The bit-gauge design is also modified to constrain side cutting to that required to achieve the desired build rates (Pastusek et al 2005). The length of the gauge pads and their relief relative to the gauge trimmers are the primary bit design factors influencing the gain that may develop in the pattern.…”

Section: Vibrationally Induced Borehole-pattern Limitersmentioning

confidence: 99%

Borehole-Quality Design and Practices To Maximize Drill-Rate Performance

Dupriest¹,

Elks²,

Ottesen³

et al. 2011

SPE Drilling &Amp; Completion

View full text Add to dashboard Cite

In 2005, the operator implemented a workflow that ensured that drilling-performance limiters were identified, redesigned, and extended continuously. The use of mechanical-specific-energy (MSE) surveillance to address bit limiters and dysfunction has been published previously. The purpose of this paper is to discuss additional practices that have been developed to extend the nonbit performance limiters, particularly those related to borehole quality.There have been more than 40 nonbit performance limiters identified and redesigned globally. While these are diverse, those with the greatest global impact were found to be tied directly to borehole quality. Consequently, in 2008, the performance-management workflow was modified to increase awareness of borehole quality as a performance limiter. The result was that acceptable borehole quality became defined as that which would not limit footage per day. Quality is now redesigned to the "economic limit of performance" in the given interval. The economic limit of performance is a significantly higher standard than the common industry objective for borehole quality, which is to achieve low trouble time and to run casing successfully.The average drilling footage per day drilled by the 23 operations that have been active since the performance-management process was implemented has improved by approximately 63%. Instantaneous drill rates have typically increased 100-300%. Advances in bit and nonbit limiters appear to have contributed equally, and the majority of the gain in nonbit limiters has come from improved borehole quality. Other gains have come from related limiters, such as an increased understanding of the manner in which cuttings transport and tripping operations are controlled by borehole quality.The paper discusses the technical models that are used to understand the major borehole limiters, the engineering design, and the real-time practices that have been developed, as well as the field results.

show abstract

“…The objective of this well was to test pulser improvements and additional controller modifications. Both short and long gauge bits were used in this well and the system demonstrated consistently better build rates for the long gauge bits than the short gauge bits (Pastusek, 2005).…”

Section: Catoosa Well Testingmentioning

confidence: 99%

Controlling Well Path Trajectory with Rate of Penetration Modulation

Farley

Maranuk²,

Hronek³

et al. 2011

All Days

View full text Add to dashboard Cite

The majority of footage drilled directionally is achieved by using bent-housing, positive displacement motors. This established technology uses oriented drilling intervals to maintain well trajectory. These intervals can be difficult and time consuming in many drilling environments; however, the economic advantages of this system often preclude the use of more capable rotary steerable assemblies. Operators have long needed a system that fills the widening gap between the two technologies.A new system of wellbore directional control has been developed that uses continuous string rotation above a positive displacement motor and bent sub. Path deviation is achieved by brief variations in the rate of penetration (ROP) that occur once during each rotation of the bent sub. Bit advance is increased during each rotation causing the bit to drill faster in the targeted direction. This directed variation in ROP allows manipulation of hole trajectory while the bent housing and drillstring are continuously rotating. Steering is accomplished by managing pressure fluctuations within the drillstring, creating slight oscillations in the flow rate through the mud motor. These controlled fluctuations in flow rate allow variations in drilling parameters to steer the well in any targeted azimuth.The goal of this system is to eliminate all oriented drilling in applications up to 3 degree per 100 feet by employing a low risk, low cost method that maximizes ROP and hole cleaning. At the Gas Technology Institute (GTI) Catoosa Test Facility in Oklahoma, drilling tests yielded successful well trajectory manipulation, delivering up to 3 degree per 100 feet of controlled directional performance in both 6 1 / 8 " and 8 1 / 2 " hole diameters. Because a standard bent housing assembly was used, oriented drilling was always available as needed. This allowed a redundancy in directional control (oriented or rotary), widening the operational scope and technical capability of the system.

show abstract

A Fundamental Model for Prediction of Hole Curvature and Build Rates with Steerable Bottomhole Assemblies

Cited by 42 publications

References 10 publications

Nonlinear dynamic modeling and analysis of borehole propagation for directional drilling

Nonlinear dynamic modeling and analysis of borehole propagation for directional drilling

Borehole-Quality Design and Practices To Maximize Drill-Rate Performance

Controlling Well Path Trajectory with Rate of Penetration Modulation

Contact Info

Product

Resources

About