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DRILLING CASING, CEMENTING_ & COMPLETION PRQGR11M l . Prepare R' x 4' circular steel cellar: Set and cement 1Fi" x ;" wall conductor 40' below ground level. 2. Move in rig and drill 124" hole 675' - 717' - _k421 . Depth dependent on casing length on location. In this surface hole, for mud treatment use bentonite, phosphate and water to maintain *72 PCF, 50 vis . 3. Cement new 8-5/8" - 24# H-40 ST&C using a guide shoe and insert fill-up collar 1 joint above the guide shoe. Also, install 4 turboblade centralizers 1-10' above the guide shoe and one at the top of the second, fourth, and sixth joints. Cement the 8-5/8" to surface casing using 200 sacks API class "G" cement containing 2% gel and 2% Calcium chloride (268 CF Slurry) calculated on a 37.5% excess, plus 125 sacks API class "G" with 2% CaC12 only. Continuously move the pipe during displacement. W.O.C. at least 4 hours before releasing the casing and 12 hours before drilling out under the shoe. Cut-off the 8-5/8" such that the top of the 10'x 900 head will be at ground level. e Z ks S 5w 't( J V 0 5- A bti c`. -4n l•� �,-1 �� Se�4� wo ?k a c d 4. Install 10" - 3000 PSI W.P. dole ram andtydril B.0.P.E. with dual station hydraulic controls. Pressure test B.O.P.E, to 1000 PSI. S. A. Drill 7-7/8" hole 675'± to 6500' . Commence mud logging out from under surface pipe. Prepare three sets of washed samples and three sets of unwashed samples at 30' intervals commencing at ± 35001 . B. Mintain at least a 72 PCF mud 675 - 3500'; vis. 40-45 sec, with no specific fluid loss control to 3500' . For mud treatment use bentonite, phosphate and water to maintain mud properties. Make a wiper every 500' or 6 hours whichever comes first from 675'± to 65001t. Take deviation surveys at least every 500' and on bit changes. When flowline temperature reaches 100-1050 F (± 50001) , break over the mud system to a lightly treated lignosulfonate-lignite treatment targeting for a 10 cc or less F.L. , 40-45 vis by adding I! #/Bbl of lignosulfonate, 12 #/Bbl of lignite & L #/Bbl of caustic. Adjust mud weight to 74-78 PCF as necessary based on hole conditions and as necessary to retard background gas to 35-50 units. C. While tripping, continuously circulate thru the fill-up line, constantly observing the pit level for any gains . D. Prior to circulating any drilling breaks up, shut-down first & check for flow for 5-10 minutes by observing flowline. If no flow,commence with circulating drilling breakout. If flow is observed, close B.O.P.E. & procede with shut-Ln & kill procedure.