Kicking Off From Vertical; Inclination Hold (Ih) & Hold Inclination And Azimuth (Hia); Inclination Hold (Ih) - Extreme Networks PowerDrive Orbit Quick Operation Manual

PowerDrive Orbit & X6

3.5 Kicking Off from Vertical

PowerDrive tools can be used to kick off from any inclination with extensive experience in vertical
kickoffs. The following points must be considered when kicking off from vertical:
1. Make any azimuth corrections early, as large changes can be made easily at low inclination
2. Do not work pipe close to bottom on connections to avoid wiping out initial build-up doglegs. Minimize
hole enlargement
It is recommended that you initiate the kick-off in MTF mode at 100% steering ratio, and then change to
GTF mode when the hole inclination is at least 2°. It is common to switch over to GTF mode when the
inclination is 6°-8°.
3.6 Inclination Hold (IH) & Hold Inclination and Azimuth (HIA)

Inclination Hold (IH)

3.6.1
Inclination hold is a PowerDrive steering mode that allows the tool to steer at a target inclination. This
feature is designed to drill in tangent and horizontal sections and hold an inclination while reducing the
overall downlinks that the Directional Driller will need to put in. While in this steering mode azimuth is
adjusted through corrections by incrementally increasing the steering ratio in either the left or right
orientation. Inclination Hold cannot be used under 3° inclination. Between 3° - 10° inclination it can be
used cautiously. Above 10° inclination is the normal operating range.
Before engaging Inclination Hold, you must obtain a good static survey to give you an accurate
reference inclination.
1. Go off bottom
2. Stop rotation
3. Cycle the pumps to reset the tool (bring the pumps down and back up again)
4. Wait at least 3 minutes for a static survey to be taken
5. Downlink to engage Inclination Hold using one of the following three sequences
When in Inclination Hold (IH) mode, the inclination can be adjusted in steps (nudges) of 0.5°:
•
Downlink command 2-22 will nudge the inclination target up by 0.5°
•
Downlink command 2-23 will nudge the inclination target down by 0.5°
When you use IH mode the tool will slowly approach the target inclination. When a single nudge is
applied, it adds 0.1° per drill cycle, so it will take 15 minutes before the full 0.5° nudge will take effect.
If two nudges are sent at the same time, it will add 0.5° in the first drill cycle and then add 0.1° during
the next five drill cycles. If three nudges are sent at the same time, it will add 1.0° in the first drill cycle,
and add 0.1° during the next five drill cycles.
When in Inclination Hold (IH) mode, the azimuth turn correction can be adjusted in steps:
•
Downlink command 2-18 will increment the azimuth turn correction (more to the right).
•
Downlink command 2-20 will decrement the azimuth turn correction (more to the left).
Put in azimuth turn correction while in inclination hold
To turn the tool to the right while in inclination hold, send command 2-18. The tool will turn in +12.5%
steering ratio increases for every command sent to a maximum of 50%. To turn PowerDrive to the left,
send command 2-20 and just like the right-hand turn, the tool will increase the steering ratio 12.5%
each time. PowerDrive will continue to turn until the turn correction is taken out. The following figure
shows two 2-18 commands being sent to the tool increasing the steering ratio 25% to the right:
Extreme Equipment Rentals
Quick Operations Guide - rev1.4
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