By utilizing automated rig state detection, toolface orientation, recent dynamic motor yield and motor potential while sliding, and recent BHA tendencies while rotating, the H&P Bit Guidance System determined that the 29 degrees inclination projection that was calculated via legacy methods by the human directional driller was incorrect, and its actual value was a 25 degree inclination.
The reason that the traditional calculations were incorrect in this case were because the assumption of consistent performance was violated; and the motor yield ahead of the last survey was actually much lower. The Bit Guidance System however, analyzed the data in real-time and indicated that the driller had relatively accurate toolface control while drilling prior the last survey (72%) and poor toolface control while sliding after the last survey (54%). Toolface precision often varies because of numerous variables, but it is known that a toolface precision greater than 90% delivers motor yields close to the full motor potential, while toolface control at less than 50% are doing more harm than good.
Additionally, the higher accuracy of the bit position and trajectory by the Bit Guidance System determined a longer slide interval to precisely land the curve (the automated Bit Guidance System determined a 67 ft slide would be required, which is 25 ft longer than determined using a non-automated process).
The reason that the traditional calculations were incorrect in this case were because the assumption of consistent performance was violated; and the motor yield ahead of the last survey was actually much lower. The Bit Guidance System however, analyzed the data in real-time and indicated that the driller had relatively accurate toolface control while drilling prior the last survey (72%) and poor toolface control while sliding after the last survey (54%). Toolface precision often varies because of numerous variables, but it is known that a toolface precision greater than 90% delivers motor yields close to the full motor potential, while toolface control at less than 50% are doing more harm than good.
Additionally, the higher accuracy of the bit position and trajectory by the Bit Guidance System determined a longer slide interval to precisely land the curve (the automated Bit Guidance System determined a 67 ft slide would be required, which is 25 ft longer than determined using a non-automated process).