Block 69 and block 71 of Yemen are newly acquired exploratory concessions in Middle East after Zhongyuan oil-field had evaluated the releases in 2004. These two blocks separately lie in Marib-Shabwah basin and Say'un-Masila basin, which are both of rich hydrocarbons in Yemen.
Because of fitting rolling mill before 250mm rolling mill,rolling pass increasing to 17 from 10～12 and taking bearing mill,the highest rolling speed of finished mill increasing to 7 1m/s from 5 5m/s,the process request of once heating into product is meeted. Thus,the failure of guide is decreased,finished rolling temperature of product is ensured and the stability of rolling is increased. The productivity is 0 1 million tons in 1997.