Third annual report of the State Oil and Gas Supervisor of California for the fiscal year 1917-1918 : covering operations of the Department of Petroleum and Gas of the State Mining Bureau . ove the top of the upper oil sand and is a furtherguarantee that the sands are protected. Production of Well Xo. 78 before and during the period when WellX^o. 90 was drilling is as follows: ... Oil. Water. , Water in ?^ bills. I bills. I suspension (-? Prior to drilling Xo. 90— July -?. . 1,138 SS August 1,111 77 Drilling started on September 10th— September 1,017 101 I
Third annual report of the State Oil and Gas Supervisor of California for the fiscal year 1917-1918 : covering operations of the Department of Petroleum and Gas of the State Mining Bureau . ove the top of the upper oil sand and is a furtherguarantee that the sands are protected. Production of Well Xo. 78 before and during the period when WellX^o. 90 was drilling is as follows: ... Oil. Water. , Water in ?^ bills. I bills. I suspension (-? Prior to drilling Xo. 90— July -?. . 1,138 SS August 1,111 77 Drilling started on September 10th— September 1,017 101 I October . 1,043 [ 95 | . November 1,035 j 77 | * Dec-ember 1,046 I S3 | * January 974 I 70 j * February . 988 j 51 * *Centrifuge tests unavailable. Pumper reported that muddy water appeared in Well Xo. 78 duringtime Well Xo. 90 was drilling through upper oil sands. This reportcould not be veritied to our satisfaction. The slight increase of waterduring September and October makes it seem likely that some mud-ladenfluid did come through. The water did not increase and this proves theabove method of drilling a complete success. .« p % ?«. 119 5 ® CAUF0RN1A5TATE-MININ6BUREAU FLETCntR HAMILTON- RPM^LAUGHUN- MAP • LO CATI0 N OF WJL»S WITH MUDfLU ID • SHELL GOS. PROPERTY COALINGA, jy£ UPPER O/L-ZONE. ID FLUID TO SAVE SOME CASINS, Sec. 26 ~-r-~~~;^:5>r~£:Section thru Ar B. v> B. TIIIKO ; KKIOKT. 79 Since the coiiiplctioii nl No. W on Section 27 Uie Shell Company liasdrilled a number of other wells by the same method and with the sameobject in view. From these wells they dedneed the following: jreneral conditions: 1. No conductor pipe is needed as it is not necessary to put on addi- tional head over the hydraulic head of the fluid. 2. Hole is mudded almost instantly as rotary passes them. Fast drilling and rapid circulation are the means of accomplishingthis. 3. Rapid rotation is conducive to effecti
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