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Load acting on the top drive shaft fluctuates randomly, which will cause top drive output speed hard to be in consistent with the setting value.
A theoretical model is detailed for the hydraulic top drive main transmission system.
The output speed of top drive determines the speed of drill bit directly.
Electro-hydraulic proportional control was applied to vary the speed of the hydraulic top drive.
The simulation model can be used for several applications such as hydraulic top drive design and performance analysis of various drilling conditions.
Among the new techniques proposed in this paper is a simulation model for studying the performance of hydraulic top drive and capturing speed characteristics under fluctuant load.
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Nabors Industries Ltd. provides offshore platform work over and drilling rigs and manufactures top drives for a broad range of drilling applications, directional drilling systems, rig instrumentation and data collection equipment, pipeline handling equipment and rig reporting software.
We've rounded up five top drives for taking in fall's fiery red, orange, and yellow palette -- and only one of these excursions is located in the Northeast.
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