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Dr. David Curry

Baker Hughes Technology Fellow

London, United Kingdom 

1) "Drilling Performance – What is it and how can we study it in the  laboratory?"

Data: 29/11/2011, 3a feira

Hora: 15h as 17h

Local: Auditório  da COPPETEC/CT2 

2) "Why is Deep Drilling Slow?  What laboratory drilling tests tell us about how the downhole environment influences the drilling process at great depth"

Data: 02/12/2011, 6a feira

Hora: 10h as 12h

Local: Auditório  da COPPETEC/CT2

 

 

 

Dia 29 de Novembro de 2011 - Terça-Feira, das 15h as 17h - Local: Auditório  da COPPETEC/CT2

 

"Drilling Performance – What is it and how can we study it in the  laboratory?"

 

This presentation will give a definition of drilling performance and set it in the context of overall well construction.  Different aspects of drilling performance will be identified.  Ways to measure drilling performance will  be introduced and the impact of various factors on drilling cost will be evaluated. The presentation will then consider how drilling performance can be studied in the laboratory. The characteristic elements of the downhole environment and the drilling system will be summarised. Several different  types of laboratory test machine – single cutter, microbit, and  full scale - will be described. The presentation will show their key elements and which characteristics of the downhole environment and drilling system each can and cannot replicate.

Typical results generated by each type of machine will illustrate how they can be used to study different aspects of the drilling process and drilling performance.

 

Dia 02 de Dezembro de 2011 - Sexta-Feira, das 10h as 12h - Local: Auditório da  COPPETEC/CT2

 

"Why is Deep Drilling Slow?  What laboratory drilling tests tell us about how the downhole environment influences the drilling process at great depth"

 

Field data will be used to show how overall drilling rates slow significantly with increasing depth. The ability of laboratory drilling test machines to replicate the downhole environment, as presented in the first lecture, will be summarised. Next, the basics of rock fracture mechanisms will be discussed concentrating on how and why confining pressure influences rock strength. Results from a wide range of laboratory drilling tests will be used to evaluate the impact on the drilling process of a number of key downhole environmental factors – earth stresses, fluid pressures, rock and drilling fluid properties. The energetics of the rock destruction process at depth will be investigated with lab test data and videos of rock cutting at elevated borehole pressures. A conceptual model will be shown to explain at least qualitatively many of the observations. It is concluded that high borehole pressures are responsible at least in part for slow rates of penetration at great depth, and that invasion of the rock and cuttings by the drilling fluid is important for the efficiency of the drilling process.

 

Aguardamos todos lá!

SPE/UFRJ Student Chapter

http://ufrj.spe.org

 

 

 

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