Rigmanufacturer

Drill Pipe

Drill pipe is in accordance with API SPEC 5D, it can be divided into two groups:

  • Group 1- Grade E drill pipe
  • Group 3- All high strength grades of drill pipe.(Grades X-95, G-105, S-135)

Note: A the minimum elongation in 2 in.(50.8mm) shall be that determined by the following formula:

  • e=625,000A0.2/U0.9
  • where e = minimum elongation in 2 in (50.8 mm) in percent rounded to nearest 0.5%.
  • A = cross-sectional area of the tensile test specimen in square inches, based on specified outside diameter, or nominal specimen width, and specified wall thickness rounded to the nearest 0.01 in.2, or 0.75 in.2, whichever is smaller.
  • U = specified tensile strength, psi.

Note:

See Table 5 in API SPEC 5D for minimum elongation values for various size strip tensile specimens and grades. The minimum elongation for either round bar tensile specimen (0.350-in. diameter with 1.4 -in, gauge length and the 0.500-in. diameter with 2.00-in. gauge length) shall be that shown in Table 5 for a cross-sectional area "A" of 0.20 in.2.

Tolerances on dimensions

The following tolerance apply to the outside diameter of the drill pipe body immediately behind the upset for a distance of approximately 5 in. for sizes 5-1/2 and smaller, and a distance approximately equal to the OD for sizes larger than 5-1/2. Measurements shall be made with calipers or snap gages.

  • Inside Diameter: d, is governed by the outside diameter and weight tolerances.
  • Upset Dimensions: Tolerances on upset dimensions are given in Tables 7 and 8 in API SPEC 5D.
  • Eccentricity:
  • Outside Diameter: The maximum eccentricity is measured with a saddle gage (see Figure 5) at a distance of 5 to 6 in. from the end of the upset, shall not exceed 0.093 in. (total indicator reading).
  • Inside Diameter: The maximum eccentricity of the bore of the upset with respect to the outside surface of the drill pipe shall not be more than 1/16 in. (1/8 in. total indicator reading).
  • Ovality: Maximum ovality is measured with a micrometer on outside diameter of upset shall not exceed 0.093 in.
Drill Pipe Size
Size Weight Designation Calculated Plain-End Weight Outside Diameter Grade Wall Thickness Upset Ends. For Weld-on Tools Joint
Lb/ft kg/m in mm In mm
2 3/8 6.65 6.26 9.32 2.375 60.3 E,X,G,S 0.280 7.11 EU
2 7/8 10.40 9.72 14.48 2.875 73.0 E,X,G,S 0.362 9.19 IU or EU
3 1/2 9.50 8.81 13.12 3.500 88.9 E 0.254 6.45 IU or EU
3 1/2 13.30 12.31 18.34 3.500 88.9 E,X,G,S 0.368 9.35 IU or EU
3 1/2 15.50 14.63 21.79 3.500 88.9 E 0.449 11.40 IU or EU
3 1/2 15.50 14.63 21.79 3.500 88.9 X,G,S 0.449 11.40 EU or IEU
4 14.00 12.93 19.26 4.000 101.6 E,X,G,S 0.330 8.38 IU or EU
4 1/2 13.75 12.24 18.23 4.500 114.3 E 0.271 6.88 IU or EU
4 1/2 16.60 14.98 22.31 4.500 114.3 E,X,G,S 0.337 8.56 EU or IEU
4 1/2 20.00 18.69 27.84 4.500 114.3 E,X,G,S 0.430 10.92 EU or IEU
5 16.25 14.87 22.15 5.000 127.0 X,G,S 0.296 7.52 IU
5 19.50 17.93 26.71 5.000 127.0 E 0.362 9.19 IEU
5 19.50 17.93 26.71 5.000 127.0 X,G,S 0.362 9.19 EU or IEU
5 25.60 24.03 35.79 5.000 127.0 E 0.500 12.70 IEU
5 25.60 24.03 35.79 5.000 127.0 X,G,S 0.500 12.70 EU or IEU
5 1/2 21.90 19.81 29.51 5.500 139.7 E,X,G,S 0.361 9.17 IEU
5 1/2 24.70 22.54 33.57 5.500 139.7 E,X,G,S 0.415 10.54 IEU
6 5/8 25.20 22.19 33.05 6.625 168.3 E,X,G,S 0.330 8.38 IEU
6 5/8 27.70 24.21 36.06 6.625 168.3 E,X,G,S 0.362 9.19 IEU

Mechanical Properties

Tensile
Group Grade Yield Strength Tensile Strength Elongation, Min.Percent in 2 in. (50.80mm)%
Minimum Maximum Minimum
psi Mpa psi Mpa psi Mpa
1 E-75 75000 517 105000 724 100000 689 See footnote
3 X-95 95000 655 125000 862 105000 724 See footnote
G-105 105000 724 135000 931 115000 793 See footnote
S-135 135000 931 165000 1138 145000 1000 See footnote

Weld Zone Parameters

Steel Grade Min. Yield Strength Min. Tensile Strength Min. Elongation Min. AKV Impact
Mpa Mpa % J
E-75 517 689 13 20 (Average)
15 (Min Single)
X-95 609 712
G-105 655 724
S-135 724 793

Usage:

Drill Pipe Drilling is a major component, the above linked side drill pipe, drill collar couples below, the role of Torque Transmission, downward drilling bits, plus the Sham Tseng eyes.

Drill pipes