简答题 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.

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.

问答题翻译：In summary, the people who work on today s rigs are responsible for the safe and efficient operation of millions of dollar s worth of complex equipment.

问答题翻译：In general, the thermal capacity of a formation is so large that the reservoir temperature remains essentially unchanged during depletion unless a fluid injection project such as waterflooding or steam injection is initiated.