Results 251 to 260 of about 133,825 (302)

Blast Design Using Measurement While Drilling Parameters

Fragblast, 2002
Measurement while drilling (MWD) techniques can provide a useful tool to aid drill and blast engineers in open cut mining. By avoiding time consuming tasks such as scan-lines and rock sample collection for laboratory tests, MWD techniques can not only save time but also improve the reliability of the blast design by providing the drill and blast ...
Segui, J. L. B., Higgins, M. R. T.
openaire   +4 more sources

Design and evaluation of a vibration sensor for measurement-while-drilling

International Journal of Computer Applications in Technology, 2011
For the specific functional requirements, the design based on micro-quartz gyro was carried out to keep the sensor's detection side in isolation from the exciting vibrations in Measurement-While-Drilling (MWD). The supporting node position was calculated to achieve good resistance to the shock and vibration. A new mechanical structure prototyping based
Yu Liu 0026, Jun Liu 0051, Leilei Li, Yingjun Pan   +3 more
openaire   +1 more source

Smart Calliper for Measurement While Drilling

SPE/IADC Middle East Drilling Technology Conference & Exhibition, 2013
Abstract This paper outlines the R&D methodology, accelerated testing and successful results of an innovative Smart Reamer Calliper for measurement while drilling. The concept was progressed from design to prototype with long hours downhole drilling qualification tests completed in 3 years.
Wajid Rasheed, Shaohua Zhou, Nasser M. Al-Khanferi   +2 more
openaire   +1 more source

Measurements of shaft speed while drilling through bone

Journal of Oral and Maxillofacial Surgery, 1995
This study investigated the effect of force on drill speed and measured the energy consumed during the drilling process.Applied force, drill speed, and energy consumed were measured during drilling in bovine cortical bone specimens. A commercial surgical drill was fitted with a custom-designed speedometer for measuring the rotational speed.
M B, Abouzgia, D F, James
openaire   +2 more sources

Measurement-While-Drilling Tool Performance in the North Sea

SPE Offshore Europe, 1987
Abstract The in-hole failure rate and survey accuracy are key areas when judging the performance of Measurement While Drilling (MWD) tools. Shell UK Exploration and Production (Shell Expro) extensive use of two major MWD companies has enabled the underlying trends to be identified.
David Knox, John Milne
openaire   +1 more source

Chapter 9 Measurement While Drilling

1994
Publisher Summary This chapter describes the methods of measurement while drilling (MWD), including telemetry techniques, MWD sensors, abnormal pressure detection with MWD, and service company comparison. The key to the incorporation of MWD into the drilling process is the development of a reliable, cost-effective data transmission system.
R. Desbrandes, R. Clayton
openaire   +1 more source

Experimental Feasibility of the In-Drilling Alignment Method for Inertial Navigation in Measurement-While-Drilling

IEEE Transactions on Instrumentation and Measurement, 2011
Conventional methods in horizontal drilling processes incorporate magnetic surveying techniques for determining the position and attitude of the bottom-hole assembly (BHA). This results in an increased weight of the drilling assembly, higher cost due to the use of nonmagnetic drill collars necessary for shielding the magnetometers, and significant ...
Alexander S. Jurkov, Justin Cloutier, Efraim Pecht, Martin P. Mintchev   +3 more
openaire   +1 more source

Toroidal Coupled Measurements While Drilling

IADC/SPE Drilling Conference, 1983
Abstract When drilling a well, data from downhole is currently brought to the surface primarily by mud pulse or wireline systems. This paper describes a unique system to accomplish this data transmission through the use of Electro-Magnetics (EM).
openaire   +1 more source

Development of an Intelligent Measure While Drilling System for Planetary Drills

50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
This paper presents the development and preliminary validation of an intelligent measure while drilling system for planetary drills. The proposed technology is geared toward a rover-based drill capable of acquiring and transferring intact subsurface samples.
Gregory Lakanen, Leanne Sigurdson, Dale Boucher, Markus Timusk   +3 more
openaire   +1 more source

Neutron porosity measurement while drilling

IEEE Transactions on Nuclear Science, 1988
A measurement-while-drilling (MWD) neutron porosity tool has been designed that is superior to wireline porosity tools in several respects. Longer sample periods and greater porosity sensitivity reduce the statistical uncertainty in the MWD porosity measurement.
openaire   +1 more source