Scope of application:
It is used for operation in the lower deep well section and high temperature well section (> 150).
Basic formula (kg/m3):
Pre-hydrated soil 10~20
Caustic soda 3~5
Soda Ash 1~2
FV: 45 ~ 65 s
MW: 1.20~1.80 g/cm3
YP: 10~20 lb/100ft2
HTHP FL: < 15ml
MBT: < 45g/l
a. Use caustic soda and soda ash to control the pH, Ca2+, Mg2+ concentration of the system;
b. The content of soil in the control system is at a low level, and pre-hydrated soil is added to control the filtration loss and improve the quality of the mud cake. Before adding, the rubber must be treated with a diluent such as PF-THIN;
c. Use polymer deflocculants such as PF-THIN or lignosulfonate (FCLS), sulfonated lignite (SMC), sulfonated tannin (SMT), etc. to control the sticking of mud; the high soil content of the system causes When the viscosity is too high, the method of diluting with dilute glue should be used first.
d. PF-JLX and PF-WLD can also be used in this system to improve the inhibition of the system, and the amount of PF-JLX must be more than 3%;
e. Adding PF-TEX to enhance the anti-slump ability of the system; SMP and SPNH are used to control the HTHP fluid loss.