Operations Manual
Inclination Hold (IH) – In IH mode the user will select an inclination target mode and the tool will steer in gravity at 0 or 180 (up/down) to reach that inclination and stay within 0.5 degree of the target inclination. When the tool is within 0.5 degrees of the targeted inclination the tool will operate in Neutral until deviation of target is greater than 0.5 degrees. Inclination Hold R/L (IHR/IHL) – In IHR / IHL mode the user will select an inclination target and the tool will steer at tool -30 and -150 or 30 and 150 to hold inclination and turn the BHA left or right. For example, when in IHR the tool will steer constantly to achieve the inclination target but at a toolface of 30 right or 150 Right. Effectively, the tool is working to steer right and maintain a targeted inclination. The same holds for IHL where the toolface will be 30 left and 150 left. Inclination Hold RR/LL (IHRR/IHLL) – In IHRR / IHLL mode, the user will select an inclination target, and the tool will steer at toolface -60 and -120 or 60 and 120 to hold inclination and turn the BHA left or right. For example, when in IHRR the tool will steer constantly to achieve the inclination target but at a toolface of 60 right or 120 Right. Effectively, the tool is working to steer right and maintain a targeted inclination. The same holds for IHL where the toolface will be 60 left and 120 left. Inclination Hold 2 (IH2) – In IH2 mode the RST will steer to hold the current azimuth as well as a targeted inclination. Like the other INC Hold modes, the user sets an inclination, but at the completion of the downlink the tool will record its current azimuth. As the BHA deviates from targeted inclination and azimuth the tool will determine the optimal toolface at 1 degree resolution to steer back to target. The tool will target prioritizing the greater deviation between inclination and azimuth. IH2 works better at close to horizontal or lateral sections but has been shown to also work in high angle tangents.
OPS-FIELD-001 | Rev. H
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