the first YZ series DC motor and YJ seriesAC variable frequency asynchronous motor was developed successfullyby Yongji company, which put an end to the history of relying onimported motors and which filled the gap in domestic market. Thecompany takes charge of drafting the industry standard of nationaloil drilling motor. The DC ,AC motors covers more than 160 type and23 power level, ranging from 200kw to 1600kw. Which are equipped inthe 1000m—12000m oil rigs running in 14 Petroleum AdministrativeBureaus such as: Daqing, Shengli, Liaohe, Huabei, Xinjiang,Changqing etc. and some overseas oil field such as; Russia, Venezuela, Egypt etc. The domestic market share reaches 77% in2008. Currently, the oil drilling motor is experiencing a rapiddevelopment from land to sea, from China to internationalmarket.
