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• Sand pack plan: From TD to -3' above top of screen (1194'). <br />Calculate 2.5 sacks (50 lbs each, 1012/1020 mix) of Colorado Silica <br />Sand. Poured through the tremie with a water flow. <br />• Pour 1.5 sks sand (enough to fill to top of screen), wait 15 min., and <br />lower tremie to top of screen tag point. No tag. Add 10' joint - no tag; <br />add second 10' joint and tag. <br />• Decide there is a probable miscount of tremie joints. Take off the two <br />10s and add one full joint (should be #57. The miscount was later <br />confirmed when the tremie came out of the hole during the <br />cementing). Lower tremie string and tag 4' high. Uncertain of reason <br />for high tag. <br />• Pull back 5 stands of tremie (210') and pour the remainder (0.7) of the <br />first pail, plus I additional pail (85 lbs) of Cetco 3/8" coated bentonite <br />tablets. <br />• Wait 1 hour, pour 1/2 sack of sand as a protector. Water began flowing <br />up and out of tubing, but stopped. <br />NOTE: A review of the tremie calculations, found an error in the <br />assumed length of a tremie joint - 21' was assumed; it should be 21.05'. <br />The supposed high tag resulted from using the incorrect length: <br />(1197-5.5' for the stinger) /21' = 56.73 joints of tremie <br />(1197 -5.5' for the stinger) /21.08' = 56.52 joints of tremie <br />56.73 -56.52 = 0.21 joints <br />0.21x21.08' = 4.42' the tag to the top of the screen was thought to be 4' <br />high. <br />Recalculating the tag using 21.08' suggests that the sand pack was <br />actually no higher than the top of the screen and that the pellets were <br />probably placed on the top of the screen assembly. <br />November 3 <br />• Water is flowing weakly from the tubing, e I gpm. <br />• Trip in hole with tremie and tag at 11.8' on the last joint - near top of <br />screen. <br />• Pull back to 1187' and start grout pour. Cement from top of sand to <br />surface with 13 pound per gallon neat cement. Mix and pump - 1630 <br />gallons (120 sacks) in 6 stages. Pull 10 joints of tremie at each stage. <br />• Cement did not come to surface. <br />• Mix an additional 15 sacks (200 gallons) and bring cement to surface. <br />Re -fill as it falls back. <br />• Install temporary plug and valve in tubing. <br />• Estimated flow <I gpm. <br />