الفهرس 
Improvement of a local suspended bentonite behaviour to meet the standard specifications as a drilling fluid
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Abstract
The most drilling fluids used were the water based mud. Water based mud was contained mainly from Sodium bentonite. Local bentonite is a calcium bentonite with low swelling properties.The kneading process succeeded to activate the local bentonite to Sodium bentonite using 2.5 gm of Soda ash. The Rheological properties was improved using 0.15 gm of CMC ,0.15 gm of CTAB ,0.12 gm of PA and 0.9 gm of Sodium hydroxide to exceed the API standard for drilling fluids.Temperature ranging between 25 and 80 {u00B0}C at atmospheric pressure affects significantly the rheological behavior of the water base mud