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Clay minerals in drilling fluids: functions and challenges
Clay minerals, 2020The addition of clay minerals in drilling fluids modifies the dispersion's viscosity. In this article, scientific advances related to the use of clays and clay minerals (bentonite, palygorskite, sepiolite and mixtures of clay minerals) in drilling fluids
Jing Zhang +3 more
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A Drilling Contractor's View of Underbalanced Drilling
Proceedings of IADC/SPE Drilling Conference, 2002Abstract This paper is not a technical discussion of under balanced drilling (UBD). Nor is it a filled with "tricks of the trade" advocating a better technical means of drilling wells using UBD. It is a discussion about the best method, from one drilling contractor's view, to execute a safe and productive UBD project.
P.B. Thompson, R.D. Murphy
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Drilling Holes with the Bow-Drill
Technology and Culture, 1970miliar to most carpenters and joiners in Britain, which appears to corroborate the authors' analysis of the action of the ancient Egyptian stone-boring tool. Fitted preferably with a rosehead countersink bit, it is also used one-handed for countersinking. The rotation is started by tilting the brace, thus making use of the gravity couple similar to the
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Reducing Drilling Costs by Drilling Faster
Proceedings of SPE Annual Technical Conference and Exhibition, 1997Abstract A new synthetic-based Penetration Rate Enhancer designed as an environmentally acceptable alternative to terpenes is shown to be an effective treatment for increasing penetration rates by preventing or minimizing bit balling while drilling active shales prone to forming "gumbo".
Ron Bland +2 more
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British Dental Journal, 1997 It is now widely recognised that dentistry based mainly on the restoration of teeth has failed to deliver dental health to our patients. There is an urgent need for GDPs to face up to the full implications of this failure and implement a truly preventive practice philosophy. We must also recognise the particular plight of our patients with very heavily
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Chip formation and hole quality in dry drilling additive manufactured Ti6Al4V
, 2020Dry drilling known as a sustainable and complicated machining operation is usually involved in many applications of titanium alloys. Previous studies have demonstrated that different surface qualities of the drilled holes influence the service ...
W. Ming, Jiaqiang Dang, Q. An, Ming Chen
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1994
The production of a hole in a mechanical component is usually done by using a drill. Although drilling a hole appears to be a simple operation, the accurate drilling of a hole of the right size at the right location, can be difficult. A large number of tools and machines have been designed for the drilling of holes economically, accurately, and quickly,
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The production of a hole in a mechanical component is usually done by using a drill. Although drilling a hole appears to be a simple operation, the accurate drilling of a hole of the right size at the right location, can be difficult. A large number of tools and machines have been designed for the drilling of holes economically, accurately, and quickly,
openaire +2 more sources
Twist Drills and Drilling Processes [PDF]
, 1976 Abstract : This report brings together in one volume the vast information on drills and drilling processes published in numerous journals and technical papers. A review of more than 800 articles was conducted; the result being a collection of 271 of the most valuable articles in the field of drilling from worldwide publications dated 1896 to present. A
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Journal of Biomechanics, 1976
Abstract An investigation is described of the drilling process in bone. Experimental results are presented which show the interrelationships among thrust pressure, feed rate, torque, and specific cutting energy for three types of drill bits. The three types of drill bits used included a common surgical twist bit, general purpose twist bits of various
K.L. Wiggins, S. Malkin
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Abstract An investigation is described of the drilling process in bone. Experimental results are presented which show the interrelationships among thrust pressure, feed rate, torque, and specific cutting energy for three types of drill bits. The three types of drill bits used included a common surgical twist bit, general purpose twist bits of various
K.L. Wiggins, S. Malkin
openaire +3 more sources
Effects of cutting temperature and process optimization in drilling of GFRP composites
, 2020The present work deals with temperature effects and parametric optimization in the drilling of continuous glass fiber reinforced epoxy composite. Drilling ability was examined operating a drilling system with different drill bits, feed rate, and spindle ...
A. T. Erturk +4 more
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