Results 81 to 90 of about 734 (136)
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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
openaire +1 more source
Soil Science Society of America Journal, 1971
Abstract Authigenic barite has been identified in soil pedons in southeastern Oklahoma, eastern Texas, and northern Louisiana. The barite appears as fine, white powder on structural surfaces and in small pockets in the lower argillic horizon or just beneath it.
W. C. Lynn, H. Y. Tu, D. P. Franzmeier
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Abstract Authigenic barite has been identified in soil pedons in southeastern Oklahoma, eastern Texas, and northern Louisiana. The barite appears as fine, white powder on structural surfaces and in small pockets in the lower argillic horizon or just beneath it.
W. C. Lynn, H. Y. Tu, D. P. Franzmeier
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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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Precipitation of barite by marine bacteria: A possible mechanism for marine barite formation
Geology, 2012Barite (BaSO 4 ) is found throughout the ocean, yet seawater is undersaturated with respect to barite, and organisms that could account for the abundance of barite have not yet been identifi ed. The mechanism for barite formation in seawater is not fully understood.
M.T. Gonzalez-Muñoz +4 more
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Photoelastic properties of barite
Proceedings of the Indian Academy of Sciences - Section A, 1951All the 12 elasto-optic constants of barite have been determined and the values obtained for λ 5893 are $$\begin{gathered} p_{11} = 0 \cdot 21 p_{44} = 0 \cdot 002 p_{12} = 0 \cdot 25 p_{23} = 0 \cdot 19 \hfill \\ p_{22} = 0 \cdot 24 p_{55} = 0 \cdot 012 p_{13} = 0 \cdot 16 p_{31} = 0 \cdot 275 \hfill \\ p_{33} = 0 \cdot 31 p_{66} = 0 \cdot 037 p_ ...
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Effects of barite size on the fluorite flotation using the reagent scheme of GS/NaOl
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021Siyuan Yang
exaly