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Coring Rod

Boart LongyearTM is the global standard for wireline coring drill rods and has met markete demand through innovative engineering and state-of-the-art manufacturing techniques including heat-treated alloy steel tubing and proprietary tapered, case-hardened threads.

TECHNICAL SPECIFICATIONS

SIZE

OD (IN)

ID (IN)

THREAD PITCH (IN)

WEIGHT (LB/10 FT)

STANDARD RQ AND Q

BRQ

2.19

1.81

3.0

18.0

BQ

2.19

1.81

3.0

18.0

NRQ

2.75

2.38

3.0

23.4

NQ

2.75

2.38

3.0

23.4

HRQ

3.50

3.06

3.0

34.5

HQ

3.50

3.06

3.0

34.5

PHD

4.50

4.00

2.5

52.2

THIN KERF

ARQTK

44.70

37.50

6.4

10.7

BRQTK

55.80

48.40

7.30

14.3

V-WALL

NRQ

69.90

60.30

8.5

20.7

NQ

69.90

60.30

8.5

20.7

HRQ

88.90

77.80

8.5

27.4

HQ

88.90

77.80

8.5

27.4

PHD

114.30

101.60

10.2

38.3

The standard effective lengths are 1.5m & 3.0m

DRILL ROD JOINT DEPTH CAPACITY CHART

In addition to standard rods, Boart Longyear also manufactures its patented V-Wall ™ with the following characteristics:

- 30% lighter than a standard rod

- with a increased annular clearance of 30%

- increase the drop speed of our Quick Descent™ Core Barrel by up to 50%

- allows drills to reach new depths with the same amount of pullback

We can offer rods with various thread types to meet your drilling needs.

Q™ THREAD

  • Load efficiency 30%
  • For standard depths
HD™ THREAD

  • Load efficiency 40%
  • For wide diameter

RQ™ THREAD

  • Load efficiency 50%
  • For deep holes

WJ THREAD

  • API style
  • For conventional drilling


Casing

This casing is intended for single use applications, or situations where the casing is left in the hole. Its thread design double-butt joint provides strength in driving and jarring.

This casing is engineered to surpass expectations and features quicker and easier make and break characteristics than the standard W casing. This thread works well under difficult drilling conditions and is designed for repeated application. Its the tapered HD thread provides increased strength.

PDF Coring and Rod Casing

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