Formate Brines: New Solutions to Deep Slim-Hole Drilling Fluid Design Problems

1992 ◽  
Author(s):  
J.D. Downs
Keyword(s):  
Drilling Fluid ◽  
Hole Drilling ◽  
Design Problems ◽  
Fluid Design

Optimization of Drilling Fluid Design for Managing Wellbore Instability in K-Shale in the Malay Basin of Peninsular Malaysia

2002 ◽  
Author(s):  
C.P. Tan ◽  
Mohd Azriyuddin Yaakub ◽  
X. Chen ◽  
D.R. Willoughby ◽  
Pauziyah Abdul Hamid ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Peninsular Malaysia ◽  
Wellbore Instability ◽  
Fluid Design

The Research of Case Matching Algorithm in Drilling Fluid Design Expert System

2013 ◽  
Vol 321-324 ◽  
pp. 2209-2213
Author(s):  
Jian Li ◽  
You Xiao ◽  
Yue Luo
Keyword(s):  
Expert System ◽  
Nearest Neighbor ◽  
Design Method ◽  
Drilling Fluid ◽  
Case Based Reasoning ◽  
Fluid System ◽  
Matching Algorithm ◽  
Design Expert ◽  
Representation Method ◽  
Fluid Design

In the case-based reasoning in drilling fluid design expert system, it selects the corresponding representation method of attributes and matching algorithm according to the characteristics of drilling fluid system and the formulation. The representation methods of attributes in this article include digital, string and range these three methods, therefore, the corresponding matching algorithms also have nearest-neighbor, string matching and range matching these three algorithms. On this basis, and combined with the single parent genetic algorithm to optimize the initial weights combination, we can get the most optimal and realistic drilling fluid system and formula. This design method can greatly improve the efficiency and accuracy of the drilling fluid formula design.

Innovative Drilling Fluid Design and Rigorous Pre-Well Planning Enable Success in an Extreme HTHP Well

2000 ◽  
Author(s):  
D.J. Oakley ◽  
K. Morton ◽  
A. Eunson ◽  
A. Gilmour ◽  
D. Pritchard ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Fluid Design

Membrane Efficiency in Shale - An Empirical Evaluation of Drilling Fluid Chemistries and Implications for Fluid Design

2002 ◽  
Author(s):  
R. Schlemmer ◽  
J.E. Friedheim ◽  
F.B. Growcock ◽  
J.B. Bloys ◽  
J.A. Headley ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Empirical Evaluation ◽  
Fluid Design

Ultra-HPHT Drilling Fluid Design for Frontier Deep Gas Exploration in South Malay Basin

2014 ◽  
Author(s):  
Anuradee Witthayapanyanon ◽  
Kathi Chandramouleeswaran ◽  
Ahmad Bin Dollah ◽  
Dennis Clapper ◽  
Ronald Bland ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Fluid Design

SUMHOLE DRILLING: WELLBORE STABILITY CONSIDERATIONS BASED UPON FIELD AND LABORATORY DATA

1996 ◽  
Vol 36 (1) ◽  
pp. 544
Author(s):  
M.A. Addis ◽  
R.G. Jeffrey
Keyword(s):  
Field Data ◽  
Drilling Fluid ◽  
Laboratory Data ◽  
Petroleum Industry ◽  
Cost Savings ◽  
Wellbore Stability ◽  
Wellbore Instability ◽  
Attractive Option ◽  
Different Diameters ◽  
Fluid Design

Slimhole drilling is becoming an attractive option as it provides significant cost savings in the petroleum industry. Furthermore, many of the technical obstacles in adapting slimhole drilling for the petroleum industry have been addressed, such as rig modifications, small volume kick detection, drilling fluid design, etc. However, wellbore stability in slimholes is largely taken for granted, when it could potentially increase costs dramatically. In this paper, a review of the available information on the effects of hole size on hole stability is presented. Wellbore stability in holes of different diameters is discussed qualitatively based on published laboratory data and unpublished field data. The quantitative assessment of wellbore instability in slimholes is addressed using observations of instability in a well in which the far field stresses were measured.The field data presented here suggest that slimhole wells are not more stable than conventional wells. The slimhole drilled in NSW shows that even using the most conservative prediction model, wellbore instability would not be predicted—instability was however, observed.

The Structure Improvement Design of Turbodrill Diversion Liner

2012 ◽  
Vol 472-475 ◽  
pp. 688-691
Author(s):  
Xin Mei Yuan ◽  
Si Zhu Zhou ◽  
Tian Cheng Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Drilling Fluid ◽  
Equivalent Stress ◽  
Hole Drilling ◽  
Original Structure ◽  
Element Analysis ◽  
Safety Coefficient ◽  
Fillet Radius ◽  
Maximum Equivalent Stress

In order to improve the work life and reliability of turbodrill diversion liner, the parametric finite element model for turbodrill diversion liner is established by using finite element analysis software, and the result of finite element analysis is shown that the maximum equivalent stress is bigger and the work safety coefficient is low. On the basis of the result of finite element analysis and the characteristics of diversion liner, the improvement scheme is put forward and the finite element analysis is carried out. The analysis result shows that the fillet radius of diversion hole drilling fluid inlet has an importance impact on the maximum equivalent stress. When the fillet radius is 9 millimeter, the maximum equivalent stress is least, the maximum equivalent stress is reduced by 34.82% compared with the original structure, and the safety coefficient reached 1.772, and the results meet the design requirement.

Integrated Drilling Engineering Design System Based on Web Services

2012 ◽  
Vol 482-484 ◽  
pp. 1874-1880
Author(s):  
Zhi Kun Liu ◽  
Qi Li ◽  
Hong Shan Liu ◽  
Liang Wen
Keyword(s):  
Web Services ◽  
Engineering Design ◽  
Collaborative Design ◽  
Drilling Fluid ◽  
Design System ◽  
Drilling Engineering ◽  
Cross Platform ◽  
Fluid Design ◽  
Design Result ◽  
Engineering Staff

Direct towards the current research status of domestic drilling design, according to the characteristics of distributed, cross-platform and openness in Web Services, It is proposed to build a integrated drilling engineering design system included design basis, data support, drilling engineering design, cementing design, drilling fluid design and management of design result under the network environment using Web Services technology. The system would accomplished using Oracle9i and VS2008, so that it would become a reality that more drilling engineering staff or design staff distributed in different parts in a unified software platform for collaborative design.

Effect of Drillstring Deflection and Rotary Speed on Annular Frictional Pressure Losses

2013 ◽  
Author(s):  
Oney Erge ◽  
Mehmet E. Ozbayoglu ◽  
Stefan Z. Miska ◽  
Mengjiao Yu ◽  
Nicholas Takach ◽  
...  
Keyword(s):  
Pressure Loss ◽  
Drilling Fluid ◽  
Flow Behavior ◽  
Hole Drilling ◽  
Accurate Estimation ◽  
Drilling Fluids ◽  
Limited Information ◽  
Pressure Losses ◽  
Gas Drilling ◽  
Fracture Pressure

Keeping the drilling fluid equivalent circulating density in the operating window between the pore and fracture pressure is a challenge, particularly when the gap between these two is narrow, such as in offshore applications. To overcome this challenge, accurate estimation of frictional pressure loss in the annulus is essential, especially for multilateral, extended reach and slim hole drilling applications usually encountered in shale gas and/or oil drilling. A better estimation of frictional pressure losses will provide improved well control, optimized bit hydraulics, a better drilling fluid program and pump selection. Field and experimental measurements showed that pressure loss in the annulus is strongly affected by the pipe rotation and eccentricity. Eccentricity will not be constant throughout a wellbore, especially in highly inclined and horizontal sections. In an actual wellbore, because of rotation speed and the applied weight, some portion of the drillstring will undergo compression. As a result, variable eccentricity will be encountered. At high compression, the drillstring will buckle, resulting in sinusoidal or helical buckling configurations. Most of the drilling fluids used today show highly non-Newtonian flow behavior, which can be characterized using the Yield Power Law (YPL). Nevertheless, in the literature, there is limited information and research on YPL fluids flowing through annular geometries with the inner pipe buckled, rotating, and eccentric. Furthermore, there are discrepancies reported between the estimated and measured frictional pressure losses with or without drillstring rotation of YPL fluids, even when the inner pipe is straight. The major focus of this project is on a horizontal well setup with drillstring under compression, considering the influence of rotation on frictional pressure losses of YPL fluids. The test matrix includes flow through the annulus for various buckling modes with and without rotation of the inner pipe. Sinusoidal, helical and transition from sinusoidal to helical configurations with and without the rotation of the drillstring are investigated. Results show a substantial difference of frictional pressure losses between the non-compressed and compressed drillstring. The drilling industry has recently been involved in incidents that show the need for critical improvements for evaluating and avoiding risks in oil/gas drilling. The information obtained from this study can be used to improve the control of bottomhole pressures during extended reach, horizontal, managed pressure, offshore and slim hole drilling applications. This will lead to safer and enhanced optimization of drilling operations.

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