索头环的强度取决于:() ["环部的强度","横销的强度","所配钢丝绳索的强度","环部或横销的强度"]
不是钻井液滤失量确定原则的()。 ["A、井下正常","B、不损害油气层","C、降低成本","D、加重剂用量"]
学习型组织的概念及特点?
有关铁滑车的拆检,下述正确的是:() ①、各部件应先用机油清洗干净,再检测; ②、每次检测必须做好记录; ③、为保持滑车整洁不能经常加油 ["①、③","①、②、③","①、②","②、③"]
往钻井液中加入()能最有效地降低滤饼摩擦系数。 ["A、水","B、润滑剂","C、加重剂","D、絮凝剂"]
企业再造的基础工作?