On-site vibration test of the servicing rig substructure is made, and the frequency response function curve and preceding 10 modes frequency are obtained.
对现役钻机底座做了现场振动测试，得到频响函数曲线及前10阶模态频率。
Thus, it's necessary to improve the design of rig substructure or better the dynamic characteristic of substructure that is being used by dynamic modification.
所以改进钻机底座的设计或对现役钻机底座进行动力修改以改善其动态特性，很有必要。
It is at the same elevation as the rig floor, usually cantilevered out from the main substructure supporting the rig.
同钻机平台具有同样的高度，通常由支撑钻机的主结构悬臂伸出。
Main parts such as crownblock, mast, substructure, rotary table and travelling system of drilling rig meet API standard.
钻机天车、井架、底座、转盘及游动系统等主要配套件符合API规范。
ZJ15 is the most commonly used rig in Daqing oilfield, but its substructure doesn't work well because of its dynamic characteristic.
ZJ15型钻机是大庆油田使用最多的钻机，但由于其底座的动态特性，工作状况欠佳。
ZJ15 is the most commonly used rig in Daqing oilfield, but its substructure doesn't work well because of its dynamic characteristic.
ZJ15型钻机是大庆油田使用最多的钻机，但由于其底座的动态特性，工作状况欠佳。
应用推荐