Mineral Technology and Output Per Man Studies, Issue 10

American Petroleum Institute areas barrels Bureau of Mines cable-tool drilling California cement Census coring crews crude oil decade deeper drilling depths derrick directional drilling discovery drill pipe drilling mud early East Texas efficient engineering equipment exploration feet flow fluid formations fuel gas lift geologists geophysical Gulf Coast high-pressure hole important improved increased Interstate Commerce Commission Kiessling labor requirements long-time man-hour methods MINERAL TECHNOLOGY natural gas natural gasoline natural-gasoline number of wage oil and gas oil fields Oklahoma operation percent petroleum and natural-gas Petroleum Engineer petroleum products petroleum refining pipe lines pipe-line plants pools practice pressure pumping random drilling recent recovery reduced refineries reported reservoir rotary drilling sand seismograph steel storage STUDIES WPA-NATIONAL RESEARCH surface tanks technical technique TECHNOLOGY AND OUTPUT transportation trend tubing U. S. Bureau U. S. Dept United view shows workers WPA-NATIONAL RESEARCH PROJECT