API Обычные штанговых

API Conventional Sucker Rod Our conventional sucker rods are API monogrammed. Grade C sucker rod: Moderate strength, not susceptible to sulfide stress cracking, suitable in sour medium. Grade D sucker rod: Made of quality heat treated steel alloy, with high tensile and yield strength; suitable for non-corroding or mildly corroding environment.Grade K sucker rod: With good corrosion resistance in H2S, CO2 and NaCl media, superior tensile strength. Grade HL and HY sucker rod: High strength; structure and size matching with grade D sucker rod; withstanding 966-1, 136 MPa (140, 000-164, 720 psi); suitable for deep and large displacement wells. Sucker Rod Specifications GradeTrade Sizein (mm)Nominal diameter of ext. thread in (mm)Nominal diameter of coupling in (mm)Coupling for slim hole ODmm (in)CouplingODmm (in)Wrench squareW¡ÁLmm (in)Lengthseriesm (ft)C5/8 (15.9)15/16 (23.8)5/8 (15.9)31.8 (1-1/4)38.1 (1-1/2)22.2×31.8 (7/8×1-1/4)7.62 (25)D3/4 (19.1)1-1/16 (26.99)3/4 (19)38.1 (1-1/2)41.3 (1-5/8)25.1×31.8 (1×1-1/4)9.14 (30)K7/8 (22.2)1-3/16 (30.16)7/8 (22.2)41.3 (1-5/8)46 (1.812)25.4×31.8 (1×1-1/4)0.6 (2), 1 (3)H1 (25.4)1-3/8 (34.93)1 (25.4)50.8 (2)55.6 (2.187)33.3×38.1 (1-5/16×1-1/2)2 (6), 3 (10)1-1/8 (28.6)1-9/16 (39.7)1-1/8 (28.6)57.2 (2-1/4)60.3 (2.375)38.1×41.3 (1-1/2×1-5/8) Mechanical Properties of Sucker Rods GradeYield strengthσs MPa (psi)Tensile strength σb MPa (psi)Elongationδ%Reduction of area ψ%K372 (53, 940)589-793 (84, 970-114, 985)1360C414 (60, 030)620-793 (89, 900-114, 985)1350D586 (84, 970)793-965 (114, 985-139, 925)1050HL793-862 (114, 985-124, 990)966-1136≥1245-55HYσ0.1 MPa (psi)σb MPa (psi)HRC SurfaceHB Core540 (78, 300)980-1, 176 (142, 100-170, 520)≥42≥224