SGMG-20A2V-HS21 Industrial Yaskawa 1800w Servo Frequency Module

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Stabilization

The 3-point geometry determines directional behavior and wellbore curvature when a Navi-Drill steerable system is used in the oriented mode. The stabilizer blade width, profile, and hard facing material all contribute to successful steering with minimal difficulty in transferring weight to the bit. Additional stabilizers in the BHA will not necessarily improve steering performance and may increase torque in the rotary mode and drag in the oriented mode. Nevertheless, additional drilling assembly stabilization may be required to improve buckling and dynamic stability and to assist in the centralization of certain MWD formation evaluation modules.

Drill-String Rotation The maximum allowable rotation speed is limited by the strength of the motor components. The actual limit depends on the specific motor configuration. It is defined for all common motor configurations and AKO angles on the internet at www.bakerhughesdirect.com (after logging in, select INTEQ > Engineer Toolbox). For certain configurations, no rotation is allowed beyond specified AKO angles. Rotation speeds should be selected after consideration of drill-string harmonic vibration modes in order to avoid conditions where resonance may occur. Chapter 4 introduces BHASYSPro, a dynamic modeling tool.