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Pushing a shovel through snow, planting an umbrella on the beach, wading through a ball pit, and driving over gravel all have one thing in common: They all are exercises in intrusion, with an intrudin...
DRILL CORE MINERAL ANALYSIS BY MEANS OF THE HYPERSPECTRAL IMAGING SPECTROMETER HySpex, XRD AND ASD IN PROXIMITY OF THE MYTINA MAAR, CZECH REPUBLIC
Remote Sensing Imaging Spectroscopy Geology Drill Cores Mineralogy Mytina maar
2016/1/15
Imaging spectroscopy is increasingly used for surface mapping. Therefore different expert systems are being utilized to identify surface cover materials. Those expert systems mainly rely on the spectr...
Kristina Slawny (left) and Jay Johnson (right) stand next to the Deep Ice Sheet Coring Drill, designed and managed by the Ice Drilling Design and Operations group at the University of Wisconsin-Madiso...
Analysis on relationship between stress and drill cutting weight using numerical modeling–A case study in Jinjiazhuang coal mine
Stress Drill cutting weight Numerical modeling
2012/4/12
The relationship between stress and drill cutting weight (DCW) is studied with numerical modeling and field testing. Jinjiazhuang coal mine 110403 workface is used as a case study. Stress analysis of ...
Drill pipe failure prevention-Corrosion protection with drill pipe surface coating and management of drill pipe use with fatigue database-
zinc coating drill pipe fatigue database Von Mises Stress
2009/5/6
Drill pipe failure is a very serious problem for Teikoku Oil Company(TOC) to continue deep well drilling. Then TOC has continued to carry out research in order to avoid this trouble and started some ...
Measurement of heat generation in drill bits under simulated drilling conditions and estimation of temperatures in drill bits during drilling
heat generation in tri-cone bits cooling effect by circulation fluid
2009/4/24
In high-temperature formation drilling, the life of drill bits becomes shorter due to thermal damage to the O-ring seal set in the bearing part. An increase in the formation temperature has been rega...
Research on the Method of Strength Evaluation of Drill Pipe for Deep Drilling
Method of Strength Evaluation Drill Pipe Deep Drilling
2009/4/1
During drilling operation various forces are exerted on a drill pipe such as a tension due to the weight of the drill string and vessel heave, as well as a bending stress due to vessel movement and oc...
Improvement of the drill head positioning accuracy using magnetic sensors
magnetic sensor pitch sensor precise measurement
2009/3/5
Precise measurement of drill head position is required to avoid the collision between the drill head and underground facilities, when a horizontal drilling machine is used for constructing underground...
Development of a Precision Seed Drill for Oilseed Rape
Oilseed rape precision seed dril conventional dril
2009/1/8
At the present time, the most widely used machine for seed and oilseed planting is a seed drill with a roller-type-metering device. Due to nonuniform spacing of seeds along the rows and lack of contro...