Novel Application of Sodium Silicate Fluids Achieves Significant Improvement of the Drilling Efficiency and Reduce the Overall Well Costs by Resolving Borehole Stability Problems in East Africa Shale

2004 ◽  
Author(s):  
Wael M. El Essawy ◽  
Rosli bin Hamzah ◽  
Mirghani Mohamed Malik ◽  
David Knox ◽  
Mohammed R. Monem ◽  
...  
Keyword(s):  
East Africa ◽  
Sodium Silicate ◽  
Borehole Stability ◽  
Stability Problems

Mud Chemistry Effects on Time-Delayed Borehole Stability Problems in Shales

2002 ◽  
Author(s):  
Erling Fjær ◽  
Rune M. Holt ◽  
Olav-Magnar Nes ◽  
Eyvind F. Sønstebø
Keyword(s):  
Borehole Stability ◽  
Stability Problems

Study on the Chemical Modification Process of Jute Fiber

TAPPI Journal ◽  
2010 ◽  
Vol 9 (2) ◽  
pp. 23-29 ◽  
Author(s):  
Wei-ming Wang ◽  
Zai-sheng Cai ◽  
Jian-yong Yu
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Treatment Time ◽  
Jute Fiber ◽  
Process Conditions ◽  
Silicate Concentration ◽  
Sodium Hydroxide Concentration ◽  
Liquor Ratio ◽  
Degumming Process ◽  
Selection Of

Degumming of pre-chlorite treated jute fiber was studied in this paper. The effects of sodium hydroxide concentration, treatment time, temperature, sodium silicate concentration, fiber-to-liquor ratio, penetrating agent TF-107B concentration, and degumming agent TF-125A concentration were the process conditions examined. With respect to gum decomposition, fineness and mechanical properties, sodium hydroxide concentration, sodium silicate concentration, and treatment time were found to be the most important parameters. An orthogonal L9(34) experiment designed to optimize the conditions for degumming resulted in the selection of the following procedure: sodium hydroxide of 12g/L, sodium silicate of 3g/L, TF-107B of 2g/L, TF-125A of 2g/L, treatment time of 105 min, temperature of 100°C and fiber to liquor ratio of 1:20. The effect of the above degumming process on the removal of impurities was also examined and the results showed that degumming was an effective method for removing impurities, especially hemicellulose.

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