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Tribological characteristics of composite brake pads under variable load and speed. [PDF]
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IADC/SPE International Drilling Conference and Exhibition, 2020
Abstract Incidences with sag of solid weighting agents in drilling fluids can lead to potential drilling impediments including; loss of wellbore control, lost circulation, stuck pipe and high torque. The presence of sag has relatively often been the cause for gas kicks and oil-based drilling fluids are known to be more vulnerable for sag
Titus Ntow Ofei +6 more
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Abstract Incidences with sag of solid weighting agents in drilling fluids can lead to potential drilling impediments including; loss of wellbore control, lost circulation, stuck pipe and high torque. The presence of sag has relatively often been the cause for gas kicks and oil-based drilling fluids are known to be more vulnerable for sag
Titus Ntow Ofei +6 more
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2020
Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the responses of these cycles to changes in climate and tectonics. Paleo-reconstruction involves the application of various tracers that record seawater compositions, which in turn may ...
Weiqi Yao +2 more
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Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the responses of these cycles to changes in climate and tectonics. Paleo-reconstruction involves the application of various tracers that record seawater compositions, which in turn may ...
Weiqi Yao +2 more
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Insulating epoxy/barite and polyester/barite composites for radiation attenuation
Applied Radiation and Isotopes, 2013A trial has been made to create insulating Epoxy/Barite (EP/Brt) (ρ=2.85 g cm(-3)) and Crosslinked Unsaturated Polyester/Barite (CUP/Brt) (ρ=3.25 g cm(-3)) composites with radiation attenuation and shielding capabilities. Experimental work regarding mechanical and physical properties was performed to study the composites integrity for practical ...
M A, El-Sarraf, A, El-Sayed Abdo
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Earth and Planetary Science Letters, 1972
Abstract Theoretical calculations of barium sulphate saturation in the sea water column have been compared to the barium concentrations in the eastern Pacific Ocean and in pore waters filtered from sediments containing marine barite. There is good agreement between the calculated saturation value, 44–49 μg/kg barium at 4–5 km depth and 1°C, and the ...
Thomas M. Church, Kenneth Wolgemuth
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Abstract Theoretical calculations of barium sulphate saturation in the sea water column have been compared to the barium concentrations in the eastern Pacific Ocean and in pore waters filtered from sediments containing marine barite. There is good agreement between the calculated saturation value, 44–49 μg/kg barium at 4–5 km depth and 1°C, and the ...
Thomas M. Church, Kenneth Wolgemuth
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