Aug 16th ruo Aug 17th, Oilbayer sonyere na ụlọ ọrụ ọkọlọtọ nke "Oil Well Cement Performance Requirements" haziri nke National Oil and Gas Standardization Committee Drilling Engineering Sub-Technical Committee na Yichun City, Heilongjiang Province, na sonye na mgbanwe nke cementing metụtara. teknụzụ.
Oge nzipu: Sep-10-2018