A saturated saltwater drilling fluid based on salt-responsive polyampholytes
JIANG Guancheng,HE Yinbo,CUI Wuge,YANG Lili,YE Chenxi
Table 1
Influence of HvL and LvH on basic performance of base bentonite mud with saturated salt.
Sample
Apparent viscosity/
(mPa·s)
Plastic
viscosity/
(mPa·s)
Yield point/
Pa
Φ
6
/
Φ
3
API fluid loss/mL
Base mud
8.5
6
2.56
8/7
139.8
Base mud +
2% HvL
52.0
31
21.46
5/4
4.1
Base mud+
2% LvH
18.0
12
6.13
4/3
22.0