Rock Drilling Tools
Oil well drill pipes are the primary connecting components in oilfield drilling operations, linking the surface rotary system, hoisting system, and circulating system with the drill collars and drill bits.
Through the drill string, rotary torque is transmitted from the rotary table to the drill bit, vertical movement is controlled by the hook system, and drilling fluid is circulated to the bottom of the well. This integrated operation enables continuous rock breaking, cuttings removal, and efficient drilling progress.
The products meet or exceed the requirements of: API SPEC 5DP, API SPEC 7-2, API RP 7G.
Oil well drill pipes play a critical role in oil and gas drilling operations as well as geological exploration projects.
| Size | Nominal weight | Plain end weight | Wall thickness | Inner diameter | ||||
| mm | inch | lb/ft | lb/ft | kg/m | inch | mm | inch | mm |
| 60 | 2 3/8 | 6.65 | 6.26 | 9.33 | 0.28 | 7.11 | 1.815 | 46.1 |
| 73 | 2 7/8 | 10.4 | 9.72 | 14.47 | 0.362 | 9.19 | 2.151 | 54.6 |
| 89 | 3 1/2 | 13.3 | 12.31 | 18.34 | 0.368 | 9.35 | 2.764 | 70.2 |
| 15.5 | 14.63 | 21.79 | 0.449 | 11.4 | 2.602 | 66.1 | ||
| 102 | 4 | 14 | 12.93 | 19.27 | 0.33 | 8.38 | 3.340 | 84.8 |
| 15.7 | 14.69 | 21.87 | 0.38 | 9.65 | 3.240 | 82.3 | ||
| 114 | 4 1/2 | 16.6 | 14.98 | 22.32 | 0.337 | 8.56 | 3.826 | 97.2 |
| 20 | 18.69 | 27.84 | 0.43 | 10.92 | 3.64 | 92.5 | ||
| 127 | 5 | 19.5 | 17.93 | 26.7 | 0.362 | 9.19 | 4.276 | 108.6 |
| 25.6 | 24.03 | 35.8 | 0.5 | 12.7 | 4 | 101.6 | ||
| 140 | 5 1/2 | 21.9 | 19.81 | 29.52 | 0.361 | 9.17 | 4.778 | 121.4 |
| 24.7 | 22.54 | 33.57 | 0.415 | 10.54 | 4.67 | 118.6 | ||
| 168 | 6 5/8 | 25.2 | 22.19 | 33.04 | 0.33 | 8.38 | 5.965 | 151.5 |
| 27.7 | 24.22 | 36.06 | 0.362 | 9.19 | 5.901 | 149.9 | ||
The standard material configuration for our DTH drill pipes is as follows:
- Tool joints: 42CrMo alloy steel
- Pipe body: R780 steel
Other material combinations can be customized based on specific application requirements.
Drill pipe length is typically selected according to the drilling rig specifications and operating conditions. Common standard lengths include 1.5m, 3m, and 6m. Custom lengths can also be manufactured upon request.
To extend service life and maintain reliable performance, we recommend the following maintenance practices:
- Apply an appropriate amount of thread grease to the joints before each use
- Clean the drill pipes after operation to remove mud and debris
- Inspect drill pipes regularly and promptly repair or replace damaged or deformed components
- Store drill pipes away from heavy loads and high-humidity environments to prevent deformation and corrosion
Leveraging many years of global field experience to provide perfectly matched drilling tools, drill rigs, and air compressors for your toughest projects.