a distance of about 200 miles at the end of this time period no settling or compaction of the suspended solids was visually detectable the suspension was subjected to three freeze thaw cycles of 24 hours at 18 u00b0 c and 24 hours of 60 u00b0 c temperatures the suspension was allowed to sit at ambient temperature and checked for settling periodically after six months the test was terminated with no settling evident polymers with different levels of hydration were used to prepare stable suspensions the suspensions were prepared in accordance with the following recipe ______________________________________ wt g wt ______________________________________hydrocarbon oil sup a 116 g 39 2anionic surfactant sup b 12 g 4 1suspending agent sup c 7 4 g 2 5hydrated cmc sup d 160 g 54 2______________________________________ sup a soltrol u00ae 145 a blend of c sub 9 c sub 14 isoparaffins with boiling point range of 340 570 f 171 299 u00b0 c sup b orfom u00ae co 733 an aqueous solution of c sub 14 c sub 16 alkanesulfonates 60 active sup c cab o sil ts 720 a hydrophobic amorphous fumed silica sup d drispac u00ae carboxymethyl cellulose with hydration levels show in table i the suspensions were allowed to stand at ambient conditions and observed periodically for settling of.