Main difference of the technics between the Japanese and the American are considered which should be improved urgently.
1, Drilling. Generally speaking the drilling time spent in Japan is double as compared with one in U. S. A., mainly because of inferior in these following problems: the time spending for rigging up and breaking down, the speed of round trip for changing bit, compounding of diesel engine, the quality of bit and the drilling method, the selection of mud, the speed of the directional drilling, and the time spending for geological investigation and the completion of well.
2, Production. Main problems production concerning are as follows: the prevalency of chemical treatment, the quality of the sub-surface pumps and the pumping unit, the sub-surface hydraulic pump, the gas lift, controlling flowing well, and the number of employers in the oil field.
3, Miscellaneous. Manufacturers and service company is very active in U. S. A. The quality of engineer is superior concerning common sense, Main drilling operations should be included within producing operator drilling contract concerning in Japan.
