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9 MONITOR WELL PAD 2 (MWP 2) <br />BG ("B" Groove Monitor Well) (Figure 4-15) <br />• Drill 17" hole a minimum of 40 feet or until at least 5 feet of competent bedrock is <br />encountered. (Air or Air/Foam) <br />• Run 113/4", 47#, J-55 Surface Casing. <br />• Cement with "Neat Cement" to surface. <br />• Rig up diverter and wait on cement a minimum of 4 hours. <br />• Drill out thru the surface casing with 10 5/8" diameter PDC bit. Advance drill hole to <br />1110 feet and circulate a minimum of 30 minutes. <br />• Run 5 '/2", 15.5#, J-55 casing with a guide/float shoe. Mix and pump Type I or 11 <br />Portland cement via tremie in multiple lifts. Wait on cement for a minimum of 12 hours. <br />• Trip in the hole with nominal 4 5/8" drill bit and drill to a Total Depth of 1130 feet. <br />• Circulate the hole for 30 minutes. <br /> <br /> <br />37