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Keywords: variation
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Proceedings Papers

Paper presented at the SPE Drilling and Rock Mechanics Conference, January 22–23, 1973
Paper Number: SPE-4235-MS
... to determine a suitable control strategy. This lack of data has in the past plagued the development of diamond drilling. EXPERIMENTATION The Drill The laboratory dia·mond drill con- sisted of a converted machine-shop 1-hp multi-speed drill press. The rotary speed variation is obtained through a variable- ratio...
Proceedings Papers

Paper presented at the Drilling and Rock Mechanics Conference, January 25–26, 1967
Paper Number: SPE-1708-MS
... :: - ~ 600 400- ;8 I + I . ~? . e I & 500 . a I :5 400 .300 - *4 : 93 : ~ 300 . =2 . ;8 ,-0 # 200 , ?W .>10 -. ,8 SAMPLE NO 4 >9 - / variation OF STRUCTURAL 100 - ~e - ZVISCOSITY, STRESS DIFFERENTIAL C7 - ,tANO FINAL LOAOS WITH TIME o -100 -. e - 9 a loLL_.J4__ . 0 10 20 30 40 .. TIME IHOW2CI) Fig. 5...

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