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Bridging performance of new eco-friendly lost circulation materials
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Alireza NASIRI,Ahmadreza GHAFFARKHAH,Zahra Azimi DIJVEJIN,Masood MOSTOFI,Mostafa Keshavarz MORAVEJI
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Table 1 The composition and properties of the drilling fluids.
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| Mud type | State | Apparent viscosity/
(mPa·s) | Plastic viscosity/
(mPa·s) | Yield
point/Pa | Gel strengths
10s (10 min)/Pa | Density of mud/(kg·m-3) | Fluid
loss/mL | pH | | Bentonite | Before hot rolling | 27.0 | 20 | 6.7 | 2.4(2.9) | 1 040 | 17.0 | 10.2 | | After hot rolling | 19.0 | 14 | 4.8 | 1.7(2.2) | 1 040 | 15.0 | 9.6 | | RIA-X | Before hot rolling | 21.0 | 16 | 4.8 | 1.7(2.2) | 1 024 | 5.5 | 9.1 | | After hot rolling | 16.5 | 11 | 5.3 | 1.4(1.9) | 1 040 | 9.5 | 9.3 |
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