Page 95 - Air and gas Drilling Field Guide 3rd Edition

86 CHAPTER 4 Downhole Equipment

Table 4-3a. Heavyweight Drill Pipe Range 2 Dimensions and Mechanical Properties in
USCS [7]

Approx Wall
Nominal Wt Tube ID Thick Took Jt Took Jt ID Tensible
OD (in) (lb/ft) (in) (in) Conn Type OD (in) (in) Yield (lb)
2 7/8 17.26 1.5000 0.688 NC26 3 3/8 1.5000 519,750
3 1/2 23.70 2.2500 0.625 NC38 4 3/4 2.2500 310,475

4 29.90 2.5625 0.719 NC40 5 1/4 2.5625 407,500
4 1/2 40.80 2.8125 0.844 NC46 6 1/4 2.8125 533,060
5 50.38 3.0000 1.000 NC50 6 5/8 3.0000 691,130
5 1/2 61.60 3.2500 1.125 5 1/2 FH 7 1/4 3.2500 850,465
5 7/8 57.42 4.0000 0.938 XT57 7 4.0000 799,810
6 5/8 71.43 4.5000 1.063 6 5/8 FH 8 4.5000 1,021,185

Table 4-3b. Heavyweight Drill Pipe Range 2 Dimensions and Mechanical Properties in SI
Units
Approx Wall
Nominal M TUbe ID Thick Conn Tool Jt Tool Jt Tensible
OD (mm) (kg/m) (mm) (mm) Type OD (mm) ID (mm) Yield (kN)
73 25.68 38 17 NC26 86 38 2,312

89 35.26 57 16 NC38 121 57 1,381
102 44.48 65 18 NC40 133 65 1,813
114 60.70 71 21 NC46 159 71 2,371
127 74.95 76 25 NC50 168 76 3,074
140 91.64 83 29 5 1/2 FH 184 83 3,783
149 86.42 102 24 XT57 178 102 3,558
168 106.26 114 27 6 5/8 FH 203 114 4,542

4.5 SAFETY EQUIPMENT
Drill strings used in direct circulation drilling operations for the recovery of oil,
natural gas, or geothermal fluids are usually fitted with several safety valves.