Cruise Control with Geo-Pilot

Sperry Drilling Services

By: Adnan Afsar

Cruise Control

Contents:

• What is Cruise Control.• Advantages of Cruise Control.• Requirements.• Downloading Cruise Control.• Running GP with Cruise Control.• Down linking options available.• Examples.• Facts about down linking cruise. • Bugs using Cruise Control.

Cruise Control

Advantages:

• Accurate steering within the desired zone.• Smooth hole profile.• Automated trajectory control by Geo-Pilot tool.• Use to drill accurate tangent sections for Artificial lift equipment

installation.• Use for extended reach horizontal wells.

Cruise Control

Requirements

• Geo-Pilot tool Version 3.10+• PWD ver. 3.70• Geo- Span down linking sys.

• INSITE 6.4.2 will have full functionality incorporated– 6.3.2 and lower versions require calculator scripts for RT and

Recorded.

Cruise Control

• Download– Use TF Update of 10 seconds– Uplink to surface via:

• IS VDF Item (Inclination Setting) • ICS VDF Item (Inclination Cruise control Setting)• AS VDF Item (Azimuthal Setting)

– ICS will be Data Dependant upon the Inc Cruise being active– IS will pulse either continuously or periodic

Cruise Control

• Download Contd.

ISICSAS

Cruise Control

• Download Contd.

– Inc cruise control setting are downloaded initially when downloading LWD sensors.

– Cruise control setting can be changed later on through down linking.

– Inclination Cruise must be included in the active list in the down link tab when downloading.

Cruise Control

• Download Contd.

Should be 0 (Optec Alert)

Cruise Control

• Download Contd.– Include Inclination Cruise Item

Cruise Control

• Running Downhole

– RS must be pumping periodically in order to show GP status.

– It will show whether the cruise is on/off.

Cruise Control

• Running Downhole Contd.

– ICS should be pumped in periods to find out the latest Inc cruise setting

Cruise Control

• Downlink Commands Available

• Downlink Options.doc

Cruise Control

• Example - Within Tolerances, Algorithm Correction to Maintain Trajectory

No Trend In ABI -No Change in TF or Deflection

ABI showing Dropping Trend, but within tolerances at all times - Tool Corrects TF and Deflection to Counter Trend

ABI Trend Stabilised; Tool Continues to Steer with Same TF/Deflection to Maintain Angle

Cruise Control

• Example - Drops Outside Tolerance - Immediately Corrects Trajectory

No Trend In ABI -No Change in TF or Deflection

ABI Outside Allowable Tolerance - Tool Immediately steers max allowed deflection Highside to Correct

90.0 90.0 90.0 90.090.089.8 89.7 89.7 89.8 89.989.6 90.0

ABI Within Limits; Tool starts to reduce Deflection to stop build tendancy in ABI

Deflection reduced to point where tool has zero build/drop tendancy

90.0 90.0 90.0

Cruise Control

Steering Example with Cruise Control.

Steering using ABI Inc @ 25.2o

• Inc setting = 25.2o

• Tolerance = 0.5o

• Max. build/drop Def. = 50%• Aggressiveness factor = 7• Turn Setting = -10• Inc range = 24.7o – 25.7o

Cruise Control

Steering Example with Cruise Control.

• Inc near to soft limit, cruising HS with 36% def.

Cruise Control

Steering Example with Cruise Control.

• Inc within tolerance, cruising at low def.

Cruise Control

Steering Example with Cruise Control.

• Inc near hard limit, cruising LS with max def.

Cruise Control

Steering Example with Cruise Control• ABI Inc chart when steering with Cruise. • Smooth steering profile always within range.

Cruise Control

• Cruising Facts:– Cruise Off

• Turns off cruise and leaves current TF/Def Settings– Use ABI Inc

• Turns Cruise on with Current Config, and uses current ABI as the cruise inclination

– Cruise On• Engage Cruise Control at the last settings

– Inclination Setting• Engage Cruise Control and Adjust Cruise Angle up/down by +/-

12.7 deg in 0.1 deg steps– Turn Setting

• Engage Cruise Control and add L/R turn to cruise

Cruise Control

• Commands Available• Inc Window Tolerance - Default 0.5 deg

Outside of this tolerance the tool will immediately apply max deflection up/down

• Max Allowed Deflection Up/Down - Default 60%Can limit tortuosity/soft landing etc.Will steer high deflections if combined with turn.

• Factor - Default 7 - Range 0 - 15Will affect how aggressively the tool responds to Inclination changes.Faster drilling - use lower factorSlower drilling - use higher factor

– Changing config will change settings but not affect cruise control on/off.

Cruise Control

• Coming Out of Inc Cruise– Any Manual Command Setting– Any Downlinked TF/Def, TF Corr, Def Corr Command– Special Home– Special Reset

• Manual Shortcut will Re-engage Cruise Control

Cruise Control

• Known Issues with Cruise Control

– No cruise control option available in new GP-5200– First Uplink of config may be garbage after down linking a

new config.

• Other Changes– Tool will no longer react to housing slip when going to zero

deflection or home. (Flag is disabled)

Cruise Control

Thank you