A Robust Torque and Drag Analysis Approach for Well Planning and Drillstring 
Design

Adewuya, Opeyemi; Pham, Son

doi:10.2523/39321-ms

Cited by 7 publications

(4 citation statements)

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“…Considering the limitation of the soft-string model, Ho (Ho, 1988) proposed a stiff-string model to study the influence of string stiffness on string-borehole contacts. Opeyemi and Pham (Adewuya and Pham, 1998) developed a novel torque and drag analysis approach for well planning and drill-string design. Based on the Euler beam theory, many researchers (Aadnoy and Andersen, 1998;Maehs et al, 2010;Miska et al, 1996) investigated the possibility of pipe buckling under the condition of drill-string compression.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling and field experimental validation of the axial load transfer on the drill-strings in deviated wells

Kuang

Lin

Liu

et al. 2020

Journal of Natural Gas Science and Engineering

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This paper studies the axial load transfer along the drill-strings in deviated wells by developing a finite element model based on the Euler beam theory and the augmentation Lagrangian contact algorithms. The model can simulate the entire drill-strings showing nonlinear contact model between drill-strings and casing. Special attention is given to the axial load loss, the pipe-casing contact force distribution and the slender pipe deformation. The efficacy of the proposed model is validated experimentally using a packer releasing procedure. Various drill-string factors, such as deviation angle, dogleg severity, hook load magnitude and buckling configurations, are considered for evaluating the efficiency of axial load transfer. Our analysis shows that the dogleg severity has a significant influence on the transfer, and the helical buckling of the drill-strings due to excessive loading could make it worse. This study provides a theoretical understanding of the variation of the contact force and the axial load transfer for the drillstrings in deviated wells. It can be used to better understand the working condition of downhole and guide field drilling.

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Section: Introductionmentioning

confidence: 99%

Numerical modelling and field experimental validation of the axial load transfer on the drill-strings in deviated wells

Kuang

Lin

Liu

et al. 2020

Journal of Natural Gas Science and Engineering

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“…More specifically, the measured drilling data and calculated results from the quasi-static drill string model under a certain model parameter are simultaneously drawn in a same coordinate system. Different values of model parameter are continually substituted into the quasi-static drill string model until the calculated values are in good consistent with the average measured data (Adewuya and Pham, 1998;Mccormick and Wilcox, 2013;Rae et al, 2005). However, the above semi-automatic inversion calculation is of low efficiency, especially when it is applied to the actual drilling process.…”

Section: Introductionmentioning

confidence: 86%

A generalized quasi-static model of drill string system

Gao

Wei

2015

Journal of Natural Gas Science and Engineering

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“…A number of operator companies have become aware of the importance of controlling vibration and have created programs to raise awareness and generate control strategies. [4], [5]…”

Section: -Introductionmentioning

confidence: 99%

Certain Assessment of Using MWCNT Nps in Drilling Fluid to Mitigate Stick-Slip Problem during Drilling Operation System

Alssafar¹,

Almahdawi²

2019

IJCPE

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Stick- slip is the continuous stopping& release of the Bit/BHA due to the irregular down-hole rotation prompted by the existing relationship between the friction torque and the torque applied from the surface to free the bit. Friction coefficient between BHA and wellbore is the main player of stick slip amount, which can be mitigated by support a good lubricators as additives in drilling mud. Mathematical (or empirical) solves should be done through adjusting all parameters which supposed to reduce stick- slip as low as possible using different models, one of the main parameters is drilling mud. As per Nanoparticles drilling fluid is a new technology that offers high performance it’s necessary to find out the relationship between the use of Nano fluid and the minimum stick- slip vibration. In this study (multiwall carbon Nano tube) will be used as a Nanoparticles in Fresh water bentonite mud and polymer mud by five tests per each one to find out the coefficient of friction and used it in a special torque and drag software as a part of drilling vertical well simulation to calculate expected bottom hole torque within five different Nano concentration per each mud type. In fresh water bentonite mud torque reduction was from 4000 ft-lb to 3500 ft-lb, while in polymer mud torque failed and didn’t reduce, so it raised from 2050.88 ft-lb to be around 2200 ft-lb.

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A Robust Torque and Drag Analysis Approach for Well Planning and Drillstring Design

Cited by 7 publications

References 0 publications

Numerical modelling and field experimental validation of the axial load transfer on the drill-strings in deviated wells

Numerical modelling and field experimental validation of the axial load transfer on the drill-strings in deviated wells

A generalized quasi-static model of drill string system

Certain Assessment of Using MWCNT Nps in Drilling Fluid to Mitigate Stick-Slip Problem during Drilling Operation System

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