Page 101 - Air and Gas Drilling Manual

Table 3-4: Wireline drill rod dimensions and mechanical properties (courtesy of Boart
Longyear Incorporated).
NQ
HMQ
AQ BQ Chapter 3: Downhole Equipment 3-29
Rod Body OD 1.75 in 2.19 in 2.75 in 3.50 in
ID 1.38 in 1.81 in 2.38 in 3.06 in
Wt/ft 3.14 lb/ft 4.02 lb/ft 5.24 lb/ft 7.69 lb/ft
Max OP Torque 240 ft-lb 340 ft-lb 560 ft-lb 1,100 ft-lb
Max MU Torque 350 ft-lb 470 ft-lb 710 ft-lb 1,200 ft-lb
Wall Profile Parallel Parallel Parallel Parallel
Standard Conventional Drill Rod
Figure 3-24 shows a schematic profile of standard conventional drill rod. This
type of drill rod has a much stronger connection (an abrupt change in inside diameter
at the tool joint). The outside of the rod is smooth with no increase in outside
diameter at the tool joints. The connections are API threaded shouldered
connections.

Figure 3-24: Standard conventional drill rod schematic profile of rod body, and box and
pin connections (courtesy Boart Longyear Incorporated).
Table 3-5 gives dimensions and mechanical properties for AWJ, AWJ
Lightweight, and NWJ standard conventional drill rod. Standard conventional drill
rod is available in 2 ft, 5 ft and 10 ft lengths (and custom lengths). The standard
conventional rod type is used in shallow small diameter borehole drilling operations.
These drilling rods are used exclusively for direct circulation operations. These rods
have been traditionally used in mining and geotechnical drilling operations, but there
is increased use of this drill rod type for drilling shallow small diameter
environmental monitoring wells.