简答题 翻译：Petroleum geology is the application of geology (the study of rocks) to the exploration for and production of oil and gas.

翻译:Usually, the operator sends out an invitation to bid...

问答题翻译:Usually, the operator sends out an invitation to bid to several drilling contractors who he knows have the equipment and integrity to drill the well to the specifications stated in the bid invitation.

翻译：cooperation and assistance of the drilling contracto...

问答题翻译：cooperation and assistance of the drilling contractor is required in almost every instance.

翻译：The density of a fluid is defined as its mass M per ...

问答题翻译：The density of a fluid is defined as its mass M per unit volume v.