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.
通常作业者在招标书上给它所知道的具有钻井设备和在指定位置钻井有信誉的钻井承包商发出招标要求。
问答题 翻译：cooperation and assistance of the drilling contractor is required in almost every instance.
问答题 翻译：The density of a fluid is defined as its mass M per unit volume v.
问答题 翻译：The rig electrician maintains and repairs the electrical generating and distribution system on the rig.
