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Feasibility study of on-line surface finish prediction in boring operationsChristensen, David Mark. January 1981 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1981. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 93-94).
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Development of a jack fracturing deviceKarfakis, Mario G. January 1978 (has links)
Thesis (M.S.)--Wisconsin. / Includes bibliographical references (leaf 60).
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Boring bar performance analysis for on-line monitoring of product accuracySkwor, Edward Paul. January 1980 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 126-127).
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Nonlinear dynamics of drill-stringsKapitaniak, Marcin January 2015 (has links)
This thesis has been motivated by the need to construct reliable, experimentally callibrated models of the drill-string assembly, that capture important phenomena associated with the drilling process, such as torsional oscillations, stick-slip and whirling. This can be achieved using a continuous finite element model, as well as low-dimensional torsional pendulum models in limited cases. The importance of this work lies in the fact, that the experimental rig utilizes real industrial drillbits and rock samples, which after careful identification of TOB speed curves, allows to use an equivalent friction model to accommodate for both frictional and cutting components of the bit-rock interactions. As a first step, a preliminary calibration of the FE model for a straight configuration of the drill-string is carried out, that allows to utilize the low-dimensional model to replicate behaviour of the system. In both of these cases, the agreement between experiments and modelling is achieved. Based on these preliminary studies, it is possible to verify the model in a prebuckled drill-string configuration, for which case a qualitative as well as quantitative agreement with the experiment is obtained. This allows to identify regions where the most dangerous phenomenon of stick-slip is present in parameter space of WOB and top angular speed. Next, the analysis is focused on the whirling phenomenon and calibration of the reduced order rotor model to replicate the motion of the BHA in the bore-hole. A qualitative agreement with the experiments is obtained. An interesting phenomenon of co-existing forward and backward periodic whirling solutions are observed both experimentally and numerically. The influence of the initial conditions and the friction between the BHA and the borehole are investigated, what revealed that there is a threshold value of friction coefficient for which the whirling direction changes from forward to backward.
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A review of the specific performance characteristics of hard rock tunnel boring machines09 September 2015 (has links)
M.Ing. / This dissertation provides a review of the most notable papers published with regard to the specific performance characteristics of Tunnel Boring Machines (TBM's) during the past twenty years. It is a literature study of a Bibliography of 57 publications, which were screened from an original list of 970 documents ...
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Vibration and shock amplification of drilling toolsVijayan, Kiran January 2012 (has links)
No description available.
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A numerical and experimental investigation of rectangular abrasive jets for drilling operationsYin-Shing, Chong 21 April 1995 (has links)
Graduation date: 1995
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Design of a device for drilling long, small-diameter tunnelsUppaluri, Baparao 12 1900 (has links)
No description available.
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The development of a device and technique for drilling deep holesRobb, Bruce Miller January 1969 (has links)
There is no abstract available for this thesis.
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Computerized drill point measurement and modelingGolestaani, Mdhdi Rezaa. January 1980 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 85-87).
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