Results 361 to 370 of about 945,774 (394)

Drill wear monitoring in cortical bone drilling

Medical Engineering & Physics, 2015
Medical drills are subject to intensive wear due to mechanical factors which occur during the bone drilling process, and potential thermal and chemical factors related to the sterilisation process. Intensive wear increases friction between the drill and the surrounding bone tissue, resulting in higher drilling temperatures and cutting forces. Therefore,
Danko Brezak, Tomislav Staroveški, Toma Udiljak   +2 more
openaire   +5 more sources

Drilling Engineering

, 2021

semanticscholar   +1 more source

Drill stop for twist drill

Journal of Neurosurgery, 1980
✓ An inexpensive, readily available drill stop is described that can be applied to the twist drill bit to reduce the risk of “plunge.”
Charles A. Carton, Marshall L. Grode
openaire   +3 more sources

This is not a drill

2020
Verfassungsblog: On Matters ...
openaire   +2 more sources

Drill bit seismic: A drilling optimization tool

Computer Standards & Interfaces, 1998
Abstract In recent years a new drilling optimization technique has emerged. Drill bit seismic uses the acoustic energy radiated by a working drill bit to provide time-to-depth and look-ahead information while drilling. This information, available in real time at the wellsite, significantly reduces uncertainty.
J. Menzies, R Meehan, N. Dutta, L. Nutt
openaire   +3 more sources

Drilling for Earthquakes

Scientific American, 2016
The article discusses the connection between earthquakes and oil and gas production. Topics covered include the sixfold increase in earthquakes in the Dallas-Fort Worth (DFW) area in Texas, the observation by geologist David Evans that the volume and pressure of hazardous waste injections into the oil well at a chemical weapons plant outside Denver ...
openaire   +3 more sources

Real-time rock strength determination based on rock drillability index and drilling specific energy: an experimental study

Bulletin of Engineering Geology and the Environment, 2021
Bosong Yu, Kai Zhang, Ganggang Niu, Xinran Xue   +3 more
semanticscholar   +1 more source

Delamination formation, evaluation and suppression during drilling of composite laminates: A review

Composite structures, 2019
Daxi Geng, Yihang Liu, Zhenyu Shao, Zhenghui Lu, Jun Cai, Xun Li, Xinggang Jiang, Deyuan Zhang   +7 more
semanticscholar   +1 more source

To Drill or Not to Drill: What Constitutes Commencement of Drilling Operations in Pennsylvania

SSRN Electronic Journal, 2010
The recent economic viability of the Marcellus Shale formation has brought oil and gas lease issues to the legal spotlight in Pennsylvania. What constitutes "Commencement of Drilling Operations" in Pennsylvania is a topic in Pennsylvania that has not been fully developed.
openaire   +2 more sources

Initial reports of the deep sea drilling project: National Science Foundation, Washington, D.C., 1969, 672 pp., U.S. $ 10.25

, 1971
R. Huene
semanticscholar   +1 more source