D7x11 Series II Navigator Directional Drill Supplemental Operations 55-11
Pressure gauge (4) should show a rise in hydraulic pressure. To determine torque, refer to decal on hydraulic
pump or “Portable Breakout System Torque Values,” page 55-12.
Step 4: Continue pumping hand lever and monitoring gauge until specified pressure is reached.
NOTE: If breaking a joint: At or near the maximum pressure, the pressure gauge will show a sudden large
decrease in pressure, indicating that joint has been broken. If joint does not break, do not exceed maximum
pressure of breakout system. If tightening a joint: The joint is fully tightened when specified pressure is
reached.
NOTE: Torque will vary based on drill rod characteristics. Refer to International Association of Drilling
Contractors, IADC, Drilling Manual, eleventh edition, 1992, Chapter B, Section 1, pages 30–34 for drill rod
torque specifications. IADC can be contacted at P.O. Box 4287, Houston, TX, e-mail info@iadc.org, phone (281)-
578-7171 or fax (281)-578-0589.
Step 5: If breaking a joint: Continue extending and retracting cylinder until drill rod joint
is judged to be loose enough to separate by hand.
NOTE: Operator may have to loosen nut (5) in order to extend cylinder.
Or:
Step 6: If tightening a joint: Continue extending and retracting cylinder until specified
pressure is reached.
5
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