The multicriteria method for selecting rigs for drilling gas wells from post-mining gobs [PDF]
, 2017 During drilling wellbores from the surface to recover methane from post-extraction gobs, attention should be paid to using appropriate rigs. Rigs with optimum technological parameters, adjusted to the geological setting, design of wellbore and technology
Łukańko, Ł., Hendel, J., Macuda, J.
core +1 more source
Journal of the South African Institution of Civil Engineers, 2011 The article discusses the nature of the gravimetric survey as applied and used in dolomite stability investigations on areas underlain by the Chuniespoort Group in South Africa.
I J Breytenbach, P J A Bosch
doaj
High aspect ratio diamond nanosecond laser machining. [PDF]
Appl Phys A Mater Sci Process, 2023 Golota NC +7 more
europepmc +1 more source
Laboratory Testing of Percussion Drills for Geothermal Applications [PDF]
, 1980 Laboratory tests of percussion drilling tools which were done at Drilling Research Lab, Salt Lake City, during February 1980, are described. The purpose of the tests was threefold: (a) to compare the parenetration rates of different hammers with each ...
Finger, John T.
core
Results from Testing of Two Rotary Percussive Drilling Systems [PDF]
, 2010 The developmental test program for the MSL (Mars Science Laboratory) rotary percussive drill examined the e ect of various drill input parameters on the drill pene- tration rate.
Kulczycki, Eric +6 more
core
Новый инструмент для отбора проб морских отложений [PDF]
, 2009 The new core lifter for marine drilling is considered.
Штефан, Р.Ю. +2 more
core
Analysis and science-based compilation of the results of studying percussion-rotary underground slimhole digging [PDF]
, 2015 Актуальность работы обусловлена необходимостью совершенствования технологии и техники геологоразведочных работ, связанного с обеспечением энерго- и ресурсоэффективности процессов бурения.
Шадрина, Анастасия Викторовна +1 more
core
A Study of Rock Breakage Under Extreme Submerged Confining Pressure: Can DTH Hammer Drilling Deliver? [PDF]
International audienceABSTRACT: Drilling cost is one of the main obstacles hindering the development of deep geothermal energy, especially in hard granite formations at great depths.
Yang, X. +7 more
core +1 more source
Numerical analysis of efficiency of reverse wells for percussion-rotary bits [PDF]
, 2007 Stosowanie świdrów udarowo-obrotowych do wiercenia otworów strzałowych w górnictwie jest ciągle uzasadnione z ekonomicznego punktu widzenia. Obserwuje się dominację świdrów słupkowych w stosowanej technice wiertniczej nad świdrami ostrzowymi krzyżowymi ...
Bednarz, S., Knez, D.
core
Fiber Post Removal Using a Conservative Fully Guided Approach: A Dental Technique. [PDF]
Case Rep Dent, 2022 Alfadda A, Alfadley A, Jamleh A.
europepmc +1 more source