WIRELINE CORING RODS

DRILL ROD JOINT DEPTH CAPACITY - DRY HOLE

A B N H P
0
AWJ 800 m (2560 ft)

AWJLW 1000 m (3200 ft)

ARQTK 1500 m (4900 ft)

BWJ 1200 m (3920 ft)

BWJLW 1500 m (4900 ft)

BQ 1500 m (4900 ft)

BRQTK 1500 m (4900 ft)

BRQ 3000 m (9800 ft)

NWJ 1500 m (4900 ft)

NRQ 3000 m (9800 ft)

NRQ V-WALL 3360 m (11023 ft)

HQ 1500 m (4900 ft)

HQ V-WALL 1500 m (4900 ft)

HRQ 2500 m (8200 ft)

HRQ V-WALL 3050 m (10000 ft)

PHD 1500 m (4900 ft)

PHD V-WALL 2000 m (6500 ft)

NQ 1500 m (4900 ft)
500 m
(1600 ft)

1000 m
(3200 ft)

TECHNICAL SPECIFICATIONS
1500 m
(4900 ft)

2000 m
(6500 ft)

2500 m
(8200 ft)

3360 m
(11023 ft)

• All ratings and recommendations are based on torque and tension load testing by an independent party.
• Depth and load capacities decrease with wear. For example, de-rate by at least 50% for box shoulder thickness worn to 50% of
original.
• Actual performance may vary depending on operating conditions and drilling practices.
• Increase make-up torque to match operating torque as depth increases. Operating torque should not exceed make-up torque.

© Copyright 2017 Boart Longyear. All rights reserved. Q, RQ and V-Wall are trademarks of Boart Longyear. CORING RODS AND CASING 33
 BOX WEAR

Similar to the steel-on-steel wear systems of the joint, the box and midbody are subject to relative
sliding contact with the wall of the casing or hole. In the case of wear against the wall of the hole, the
surface of the hole may be of significantly greater hardness and roughness (not to mention cuttings
suspended in the drilling fluid) potentially resulting in rapid wear rates. However, in many applications
the cause of retirement of a drill rod is due to localized wear resulting from the deformation of the
box out of a ‘flush’ position or of the typical midbody out of straight.

In typical joints, it is inherent for the box and box end shoulder to elastically deform radially or
‘bulge’. This is due to radial and hoop stresses imposed by conventional threads which add to
drilling load stresses. This is evident by a thin section in the box shoulder and/or a small polished
area on the side of the joint where thread engagement begins. As the wear progresses, the box
becomes weaker and the deformation more pronounced, increasing the wear rate. RQ™ style joints
however, mimic the load response of a solid tube in that radial and hoop stresses imposed by the
thread subtract from drill load stresses, virtually eliminating “bulging”.

MIDBODY WEAR

It is inherent for a rod string to respond to significant drilling loads and rotation in a three dimensional
corkscrew shape, a phenomenon first identified and defined by Boart Longyear as ‘helical whirling’.
As loads or rotation increase, the contact pressure between the string and the hole increases
contributing to an increased midbody wear rate.

Given sufficient contact pressure and speed, the heat generated between the rod string and casing
or hole can cause heat-check cracking which ultimately appears as an axial crack, typically on the
box end.

The bending stresses associated with this helical whirling become significant under high load or
rotation, especially in oversize holes or ‘caves’, and may cause permanent bending of the string.
Boart Longyear™ drill rods incorporate enhanced tubing processing which doubles the bend
strength of the midbody virtually eliminating permanent bending.

CARE AND HANDLING

The use of ‘rod grease’ to reduce friction between the rod string and the casing or hole is common
however the only effective solution to reduce midbody abrasion wear is to significantly increase the
hardness through case hardening.

BOX OUTER DIAMETER

SHOULDER WEAR GAUGE:
ORDERING INFORMATION
3547010 GAUGE, BQ/BRQ R/B OD WEAR
3547011 GAUGE, HQ/HRQ R/B OD WEAR
3547027 GAUGE, NQ/NRQ R/B OD WEAR
5003593 GUAGE, PHD R/B OD WEAR

© Copyright 2017 Boart Longyear. All rights reserved. Q and RQ are trademarks of Boart Longyear. CORING RODS AND CASING 51
 NRQ™ V-WALL™ TECHNICAL INFORMATION

PERFORMANCE RATING METRIC SYSTEM IMPERIAL

Rated Drilling Depth by Joint Strength 3360 m 11023 ft

Rated Maximum Pullback 330.0 kN 74255 lbf
Rated Maximum Torque (Operating or Make-Up) 2400 Nm 1750 ft lbf
Recommended Minimum Make-Up Torque for Deep Holes over 2000m 1400 Nm 1000 ft lbf
Recommended Minimum Make-Up Torque for Deep Holes over 1000m 1000 Nm 750 ft lbf
Recommended Minimum Make-Up Torque 600 Nm 452 ft lbf
API Theoretical Burst Pressure at Box Shoulder (per API bulletin 5C3) 49 700 kPa 7,215 psi
API Theoretical Burst Pressure at Midbody (per API bulletin 5C3) 63 387 kPa 9,193 psi
API Theoretical Collapse Pressure at Midbody (per API bulletin 5C3) 52 421 kPa 7,603 psi

RATING CRITERIA METRIC SYSTEM IMPERIAL

Rod Midbody Outer Diameter 69.90 mm 2.75 in

Rod Midbody Inner Diameter 62.00 mm 2.44 in
Rod Joint Inner Diameter 60.30 mm 2.38 in
Rod Resistance to Deviation (Moment of Inertia) 11408 mm4 17.7 in4

TECHNICAL SPECIFICATIONS
Rod Weight per Unit Length 20.42 kg/3 m 45.0 lb/10 ft
Rod Content Weight (Water) per Unit Length 2.97 kg/m 0.24 gal/ft
Rod Displacement (Water) per Unit Length 0.80 kg/m 0.07 gal/ft

HQ™ TECHNICAL INFORMATION

PERFORMANCE RATING METRIC SYSTEM IMPERIAL

Rated Drilling Depth by Joint Strength 1 500 m 4,900 ft

Rated Maximum Pullback 200 kN 45,000 lbf
Rated Maximum Torque (Operating or Make-Up) 1 356 Nm 1,000 ft lbf
Recommended Minimum Make-Up Torque for Deep Holes over 2000m
Recommended Minimum Make-Up Torque for Deep Holes over 1000m 1 200 Nm 900 ft lbf
Recommended Minimum Make-Up Torque 1 010 Nm 750 ft lbf
API Theoretical Burst Pressure at Box Shoulder (per API bulletin 5C3) 30 000 kPa 4,365 psi
API Theoretical Burst Pressure at Midbody (per API bulletin 5C3) 64 000 kPa 9,850 psi
API Theoretical Collapse Pressure at Midbody (per API bulletin 5C3) 60 000 kPa 8,770 psi

RATING CRITERIA METRIC SYSTEM IMPERIAL

Rod Midbody Outer Diameter 89.0 mm 3.50 in

Rod Midbody Inner Diameter 77.8 mm 3.06 in
Rod Joint Inner Diameter 77.8 mm 3.06 in
Rod Resistance to Deviation (Moment of Inertia) 31668 mm4 49.1 in4
Rod Weight per Unit Length 11.44 kg/m 7.7 lb ft
Rod Content Weight (Water) per Unit Length 4.80 l/m 0.38 gal/ft
Rod Displacement (Water) per Unit Length 1.50 l/m 0.12 gal/ft

All ratings and recommendations are based on tension load testing by an independent party.
• These ratings apply to new, unused rods of Boart Longyear manufacture, in a straight vertical down hole, assuming compliance to Boart
Longyear Care and Handling or Product Literature and standard core drilling practices.
• Actual performance may vary depending on operating conditions and drilling practices.
• Depth and load capacities decrease with wear. For example, de-rate by at least 50% for box shoulder thickness worn to 50% of original.
• Increase make-up torque to match operating torque as depth increases. Operating torque should not exceed make-up torque.

© Copyright 2017 Boart Longyear. All rights reserved. CORING RODS AND CASING 39
 CORING RODS
ARQ™TK TECHNICAL INFORMATION

PERFORMANCE RATING METRIC SYSTEM IMPERIAL

Rated Drilling Depth by Joint Strength 1500 m 4,900 ft

Rated Maximum Pullback 130 kN 29,250 lbf
Rated Maximum Torque (Operating or Make-Up) 800 Nm 590 ft lb
Recommended Minimum Make-Up Torque for Deep Holes over 2000m
Recommended Minimum Make-Up Torque for Deep Holes over 1000m 381 N m 281 ft lb
Recommended Minimum Make-Up Torque 339 N m 250 ft lb
API Theoretical Burst Pressure at Box Shoulder (per API bulletin 5C3) 74 733 kPa 10,839 psi
API Theoretical Burst Pressure at Midbody (per API bulletin 5C3) 90 138 kPa 13,073 psi
API Theoretical Collapse Pressure at Midbody (per API bulletin 5C3) 94 464 kPa 13,700 psi

RATING CRITERIA METRIC SYSTEM IMPERIAL

Rod Midbody Outer Diameter 44.83 mm 1.76 in

Rod Midbody Inner Diameter 37.39 mm 1.47 in
Rod Joint Inner Diameter 37.39 mm 1.47 in
TECHNICAL SPECIFICATIONS

Rod Resistance to Deviation (Moment of Inertia) 2538 mm4 3.9 in4

Rod Weight per Unit Length 3.77 kg/m 2.53 lb/ft
Rod Content Weight (Water) per Unit Length 1.09 l/m 0.09 gal/ft
Rod Displacement (Water) per Unit Length 0.50 l/m 0.04 gal/ft

BQ™ TECHNICAL INFORMATION

PERFORMANCE RATING METRIC SYSTEM IMPERIAL

Rated Drilling Depth by Joint Strength 1500 m 4,900 ft

Rated Maximum Pullback 115 kN 26,000 lbf
Rated Maximum Torque (Operating or Make-Up) 800 Nm 590 ft-lb
Recommended Minimum Make-Up Torque for Deep Holes over 2000m
Recommended Minimum Make-Up Torque for Deep Holes over 1000m 504 Nm 416 ft lb
Recommended Minimum Make-Up Torque 405 Nm 300 ft lb
API Theoretical Burst Pressure at Box Shoulder (per API bulletin 5C3) 39 500 kPa 5,729 psi
API Theoretical Burst Pressure at Midbody (per API bulletin 5C3) 93 200 kPa 13,511 psi
API Theoretical Collapse Pressure at Midbody (per API bulletin 5C3) 97 300 kPa 14,117 psi

RATING CRITERIA METRIC SYSTEM IMPERIAL

Rod Midbody Outer Diameter 55.9 mm 2.19 in

Rod Midbody Inner Diameter 46.1 mm 1.81 in
Rod Joint Inner Diameter 46.1 mm 1.81 in
Rod Weight per Unit Length 6.25 kg/m 4.20 lb/ft
Rod Content Weight (Water) per Unit Length 1.67 L/m 0.13 gal/ft
Rod Displacement (Water) per Unit Length 0.80 L/m 0.07 gal/ft

All ratings and recommendations are based on tension load testing by an independent party.
• These ratings apply to new, unused rods of Boart Longyear manufacture, in a straight vertical down hole, assuming compliance to Boart
Longyear Care and Handling or Product Literature and standard core drilling practices.
• Actual performance may vary depending on operating conditions and drilling practices.
• Depth and load capacities decrease with wear. For example, de-rate by at least 50% for box shoulder thickness worn to 50% of original.
• Increase make-up torque to match operating torque as depth increases. Operating torque should not exceed make-up torque.

36 CORING RODS AND CASING © Copyright 2017 Boart Longyear. All rights reserved.
DRILL ROD OVERVIEW
DRILL ROD JOINT MAX PULLBACK RATING

A B N H P
510 kN
(115000 lbf)

450 kN
(100000 lbf)

330 kN
(74255 lbf)

TECHNICAL SPECIFICATIONS
200 kN
(45000 lbf)
BQ 115 kN (26000 lbf )
AWJ(LW) 80 kN (18000 lbf )

130 kN
(30000 lbf)
BWJ(LW) 130 kN (30000 lbf )
ARQTK 130 kN (29250 lbf )

BRQTK 200 kN (45000 lbf )

HRQ 510 kN (115000 lbf )

PHD 450 kN (100000 lbf )

BRQ 250 kN (56250 lbf )

NRQ 330 kN (74255 lbf )

NWJ 222 kN (50000 lbf )

HQ 200 kN (45000 lbf )

NQ 147 kN (33000 lbf )

80 kN
(18000 lbf)

• All ratings and recommendations are based on torque and tension load testing by an independent party.
• Depth and load capacities decrease with wear. For example, de-rate by at least 50% for box shoulder thickness worn to 50% of
original.
• Actual performance may vary depending on operating conditions and drilling practices.
• Increase make-up torque to match operating torque as depth increases. Operating torque should not exceed make-up torque.

© Copyright 2017 Boart Longyear. All rights reserved. Q and RQ are trademarks of Boart Longyear. CORING RODS AND CASING 35
 WIRELINE CORING RODS
DRILL ROD JOINT MAX TORQUE RATING

A B N H P
4600 Nm
(3300 ft-lb)

3500 Nm
(2600 ft-lb)

2400 Nm
(1750 ft-lb)
TECHNICAL SPECIFICATIONS

1500 Nm
(1100 ft-lb)
BQ 550 Nm (410 ft-lb)

1000 Nm
(750 ft-lb)
AWJ 406 Nm (330 ft-lb)

BWJLW 1000 Nm (750 ft-lb)

HRQ 3500 Nm (2600 ft-lb)

NWJ 1355 Nm (1000 ft-lb)
ARQTK 800 Nm (590 ft-lb)

NRQ 2400 Nm (1750 ft-lb)

BRQ 1500 Nm (1000 ft-lb)
BRQTK 895 Nm (660 ft-lb)

PHD 4000 Nm (3000 ft-lb)

HQ 1350 Nm (1000 ft-lb)
NQ 750 Nm (560 ft-lb)

550 Nm
(410 ft-lb)

• All ratings and recommendations are based on torque and tension load testing by an independent party.
• Depth and load capacities decrease with wear. For example, de-rate by at least 50% for box shoulder thickness worn to 50% of
original.
• Actual performance may vary depending on operating conditions and drilling practices.
• Increase make-up torque to match operating torque as depth increases. Operating torque should not exceed make-up torque.

34 CORING RODS AND CASING © Copyright 2017 Boart Longyear. All rights reserved. Q and RQ are trademarks of Boart Longyear.