Drill Pipes
Drill Pipes
Drill Pipe Sizes (API Standard)
|
Nominal OD (in) |
Weight Class (lb/ft) |
Pipe Body OD (in) |
Wall Thickness (in) |
Tool Joint OD (in) |
Common Application |
|
2 3/8 |
6.65, 7.00 |
2.375 |
0.280 – 0.308 |
3 1/16 – 3 1/2 |
Light drilling, shallow wells |
|
2 7/8 |
10.40, 10.50 |
2.875 |
0.362 – 0.375 |
3 1/2 – 4 1/8 |
Slimhole, coil tubing replacements |
|
3 1/2 |
13.30, 15.50 |
3.5 |
0.417 – 0.500 |
4 3/4 – 5 |
Standard geothermal, directional drilling |
|
4 |
14.00, 16.60 |
4.0 |
0.437 – 0.500 |
5 – 5 1/2 |
Directional or HPHT drilling |
|
4 1/2 |
16.60, 20.00 |
4.5 |
0.500 – 0.562 |
6 5/8 – 6 3/4 |
Deep well drilling |
|
5 |
19.50, 21.90, 25.60 |
5.0 |
0.362 – 0.500 |
6 5/8 – 7 |
Heavy-duty drilling, large boreholes |
|
5 1/2 |
21.90, 24.70 |
5.5 |
0.415 – 0.500 |
7 – 7 5/8 |
Deep wells, high load requirements |
|
6 5/8 |
27.70, 32.70 |
6.625 |
0.477 – 0.585 |
8 1/4 – 8 3/8 |
Offshore, big-bore, specialty applications |
Drill Pipe Grades by Metal Type and Use
|
Category |
Grade |
Yield Strength (psi) |
Material Type |
Common Applications |
|
API Standard Grades |
E-75 |
75,000 |
Carbon Steel |
Shallow wells, light-duty drilling |
|
X-95 |
95,000 |
Carbon Steel |
Medium-depth wells, general use |
|
|
G-105 |
105,000 |
High-Strength Alloy Steel |
Deeper wells, better fatigue resistance |
|
|
S-135 |
135,000 |
High-Strength Alloy Steel |
Deep wells, high-pressure/high-temperature (HPHT) |
|
|
Premium Grades |
V-150 / Z-140 |
140,000–150,000 |
Alloy Steel |
Ultra-deep, high-load operations |
|
DS-1, SS-105 |
~105,000 |
Alloy Steel |
Directional and deviated drilling |
|
|
Sour Service Grades |
Various (custom) |
95,000–135,000 (varies) |
Controlled Carbon Steel |
H₂S-rich environments (sour gas) |
|
Corrosion Resistant |
Stainless / CRA |
Varies |
Stainless / Nickel Alloys |
CO₂, H₂S, or other corrosive wells |
|
Lightweight Options |
Aluminum Alloy |
~55,000–75,000 |
Aluminum Alloy |
Extended reach drilling, weight-sensitive rigs |
|
Composite (non-mag) |
Varies |
Carbon Fiber + Resin |
Horizontal drilling, sensitive areas |
|
|
Titanium Alloy |
120,000–150,000+ |
Titanium Alloy |
High corrosion resistance, premium drilling |
Drill Pipes by Length Ranges (API Standard)
|
Range |
Length (ft) |
Length (m) |
Common Use |
|
R1 |
18 – 22 |
5.5 – 6.7 |
Rig floor handling, testing |
|
R2 |
27 – 31 |
8.2 – 9.4 |
Most common in drilling |
|
R3 |
38 – 45 |
11.6 – 13.7 |
Deep wells, offshore |