- Geological Drilling
With constant development of drilling equipment technologies in recent years, a drilling rig that combines the swivel and the motor to drive rotation of the drilling tools and drilling bit at the top of the derrick space, and to feed them downward along the guide in the derrick was developed to better satisfy the needs of special wells. In addition, there is the device for making and breaking the drill pipes, so that such operations as downhole rotation of drill string, circulation of drilling fluid, makeup and breakout of drill pipes, round trip, and rotation during round trip are realized. Top drive drilling equipment allows circulation of drilling fluid and rotation of drilling tools during a trip, which facilitates handling of complicated downhole conditions and accidents. It is quite beneficial for drilling of deep and special holes, and lays the basis for automatic drilling. Currently, the majority of the drilling rigs employed at home and abroad in such fields as petroleum, geothermal energy, natural gas, coalbed methane, hydrological well, geotechnical engineering, and geological prospecting are provided with top drive drilling equipment.
Physis direct-driven top drive units are newdrilling rigs that combine the currently most cutting-edge mechatronics designconcept, and have an integrated high power servo motor directly driving thespindle for drilling. They are substitutes for conventional drilling equipment.Compared with conventional top drive units, they not only significantlyincrease the continuous drilling torque, but also greatly reduce failure rateand maintenance intensity of the equipment. The capability to handle drillingaccidents is also enhanced. They feature high reliability, high economicefficiency, and good marketing prospects.
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