This International Standard specifies the technical delivery conditions for three product specification levels (PSL-1, PSL-2, and PSL-3) of steel drill pipe with upset ends and welded drill pipe connections for drilling and production operations in the petroleum and natural gas industries. The requirements of PSL-1 form the basis of this International Standard. Technical requirements for the different levels of PSL-2 and PSL-3 are specified in Annex G.
API 5DP is designed specifically for drill pipe and specifies material grades such as E75, X95, G105, and S135 (the number represents the minimum yield strength in ksi). The differences are primarily in yield strength, tensile strength, and toughness:
1. E75
Yield strength ≥ 75 ksi (517 MPa) and is primarily used in shallow or conventional wells.
2. X95
Yield strength ≥ 95 ksi (655 MPa), suitable for medium-deep well operations.
3. G105
Yield strength ≥ 105 ksi (724 MPa), suitable for deep wells and high-intensity operating environments.
4. S135
Yield strength ≥ 135 ksi (931 MPa), suitable for ultra-deep wells, high-pressure wells, and complex formations.
API 5DP Drill Pipe Applications:
Deep and ultra-deep well drilling exceeding 4000 meters
High-temperature (≥150℃) and high-pressure (≥60MPa) oil and gas reservoir development
Corrosive oil and gas fields containing hydrogen sulfide and carbon dioxide
Drilling operations in extreme environments such as offshore platforms and deserts
