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api sucker rods
Application: Its upper end is connected with pumping jack, lower end is connected with pump. The top one of the pump rod string is called bare rod which can seal the wellhead combined with wellhead seal box.
Name | API standard | API nominal dia. in(mm) | API length ft(mm) | Weight kg/pc | Package pc |
Pump rod | Grade D
Grade C
Grade K
| 3/4 (19) | 25(7620) | 18.38 | 100 |
30(9140) | 21.77 | 100 | |||
7/8 (22) | 25(7620) | 24.51 | 100 | ||
30(9140) | 29.04 | 100 | |||
1 (25) | 25(7620) | 32.36 | 50 | ||
30(9140) | 38.21 | 50 | |||
coupling | Grade T Grade SM
| 3/4(19) | 4(101.6) | 0.61 | _ |
7/8(22) | 4(101.6) | 0.78 | _ | ||
1(25) | 4(101.6) | 1.17 | _ |
Mechanical Properties of Sucker Rods
Grade | Yield strength σs MPa (psi) | Tensile strengthσb MPa (psi) | Elongation δ% | Reduction of area ψ% |
K | 372 (53, 940) | 589-793 (84, 970-114, 985) | 13 | 60 |
C | 414 (60, 030) | 620-793 (89, 900-114, 985)
| 13 | 50 |
D | 586 (84, 970) | 793-965 (114, 985-139, 925)
| 10 | 50 |
HL | 793-862 (114, 985-124, 990) | 966-1136 | ≥12 | 45-55 |
HY | σ0.1 MPa (psi) | σb MPa (psi) | HRC Surface | HB Core |
| 540 (78, 300) | 980-1, 176 (142, 100-170, 520) | ≥42 | ≥224 |