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Sucker Rod

Polish rod is a kind of special sucker rod connected with sucker rod and beam hanger. It is at the top of sucker rod, need to bear the most strength, so with bigger diameter and higher steel grade than sucker rod, and the surface is very smooth.

>>Introduction

Sucker rod is an important part of a sucker rod pumping equipment. Sucker Rod connect with coupling to be a rod string, and up through polished rod connection on the pumping unit or PCP motor, down connection on the pump piston or PCP, its role is to ground the reciprocating movement of the pumping unit horsehead suspension point is passed to the downhole pump or pass the rotation of the PCP motor torque to downhole PCP. Sucker rods are divided into grade of C, K, D, KD, HL, HY according to mechanical properties.

拼图

Sucker rod centralizer is a kind of downhole tools which is pumping well anti-abrasion, it is especially suitable for pumping well and directional well which above of sucker rod middle point, under the middle point of sucker rod , the rod body with nylon centralizer is works better. The centralizer is made of high strength wear-resistant material, and touched with the tubing to reduce the abrasion to achieve the purpose of anti-abrasion.

Sucker rod coupling, sub-coupling and spray coupling which are designed according to API Spec 11 B standards using the high quality carbon steel or alloy steel (the equivalent of AISI 1045 and AISI 4135) and plating metal is a kind of surface hardening technology, is the nickel, chromium, boron and silicon powder coated on the substrate metal and fused with the laser processing, Coupling type: Class T (full size and slim hole ) ,Class SM (full size and slim hole ).

>>Parameter Table

Sucker Rod Nominal Value Φ16(5/8") Φ19(3/4") Φ22(7/8") Φ25(1") Φ29(11/8")
Rod Body Diameter 15.88+0.18-0.36 (0.625+0.007-0.014) 19.05+0.20-0.41 (0.750+0.008-0.016) 22.23+0.20-0.41 (0.875+0.008-0.016) 25.40+0.23-0.46 (1.000+0.009-0.018) 28.58+0.25-0.51 (1.125+0.010-0.020)
Outer Diameter Of External Thread Shoulder 31.8+0.13-0.25 (1.250+0.005-0.010) 38.1+0.13-0.25 (1.500+0.005-0.010) 41.3+0.13-0.25 (1.625+0.005-0.010) 50.8+0.13-0.25 (2.000+0.005-0.010) 57.2+0.13-0.25 (2.250+0.005-0.010)
Wrench Width ±0.8(±0.031) 22.2(0.875) 25.4(1.000) 25.4(1.000) 33.3(1.313) 38.1(1.500)
Wrench Length 31.8(1.250) 31.8(1.250) 31.8(1.250) 38.1(1.500) 41.3(1.625)
API Rod Length ±50(±2.0) 508(20) 1118(44) 1727(68) 2337(92) 2946(116) 7518(296) 9042(356) 508(20) 1118(44) 1727(68) 2337(92) 2946(116) 7518(296) 9042(356) 508(20) 1118(44) 1727(68) 2337(92) 2946(116) 7518(296) 9042(356) 508(20) 1118(44) 1727(68) 2337(92) 2946(116) 7518(296) 9042(356) 508(20) 1118(44) 1727(68) 2337(92) 2946(116) 7518(296) 9042(356)
Domestic Rod Length±50 900,1400,1900, 2400, 2900, 3400, 7900, 9900 900,1400,1900, 2400,2900,3400, 7900,9900 900,1400,1900, 2400,2900,3400, 7900,9900 900,1400,1900, 2400,2900,3400, 7900,9900 900,1400,1900, 2400,2900,3400, 7900,9900
Upset Flange Diameter 31.1+0.13-3.17 (1.219+0.005-0.125) 35.7+0.13-3.17 (1.406+0.005-0.125) 38.1+0.13-3.17 (1.500+0.005-0.125) 48.4+0.13-3.17 (1.906+0.005-0.125) 55.6+0.13-3.17 (2.188+0.005-0.125)
AR±3.2(±0.125) 47.6(1.875) 57.1(2.250) 66.7(2.625) 76.2(3.000) 85.7(3.375)
CR+1.59-0.40 (+0.063-0.016) 3.2(0.125) 3.2(0.125) 4.8(0.188) 4.8(0.188) 4.8(0.188)
Mechanical Properties Of Steel Sucker Rod
Grade Minimum Yield Strength Minimum Tensile Strength Maximum Tensile Strength Elongation Reduction Of Area Z% Surface Hardness HRC Core Hardness HB Fatigue Life
(0.2% Residual Deformation) 200mm%
K 60000 414 90000 621 115000 793 13 50 / / /
C 60000 414 90000 621 115000 793 13 50 / / /
D 85000 586 115000 793 140000 965 13 50 / / /
KD 85000 590 115000 795 140000 965 13 50 / / /
HL 115000 795 140000 965 173339 1195 13 45 / / /
HY / / 140000 965 173339 1195 / / 42 224 /
EHL / / 188500 1300 217500 1500 / / 50 320 2.5X106
Note: when the yield strength cannot be measured, it should be considered to be processed into standard sample installation drawing
1) It is generally made of high quality carbon steel, which can reach the mechanical properties of the table.
2) Molybdenum steel (but not limited to this type of steel) is generally used, and the mechanical properties of this table can be achieved through effective heat treatment.
Chemical Composition Of Common Sucker Rod
AISI C Si Mn P S Cr Ni Mo V Cu Al
1541 0.36-0.45 0.15-0.35 1.35-1.65 0.04 0.04 0.3 0.35 0.06 0.04-0.09 0.35 0.035
4120 0.17-0.24 0.17-0.37 0.4-0.7 0.025 0.025 0.8-1.1 0.3 0.15-0.25 / 0.2 /
4130 0.26-0.33 0.17-0.37 0.4-0.7 0.025 0.025 0.8-1.1 0.3 0.15-0.25 / 0.2 /
4138 0.37-0.45 0.17-0.37 0.9-1.2 0.025 0.025 0.9-1.2 0.3 0.2-0.3 / 0.2 /
4138M 0.37-0.45 0.17-0.37 0.9-1.2 0.025 0.025 0.9-1.2 0.3 0.2-0.3 0.04-0.09 0.2 /
4140 0.38-0.45 0.17-0.37 0.5-0.8 0.025 0.025 0.9-1.2 0.3 0.15-0.25 0.04-0.09 0.2 /
4142 0.38-0.45 0.17-0.37 0.5-0.8 0.025 0.025 0.9-1.2 0.3 0.15-0.25 0.04-0.09 0.2 /
3130 0.22-0.29 0.15-0.35 0.71-1.0 0.025 0.025 0.42-0.65 0.72-1.0 0.01-0.06 / 0.2 /
4320 0.18-0.42 0.15-0.35 0.8-1.0 0.025 0.025 0.7-0.9 1.15-1.5 0.2-0.3 0.04-0.09 0.35 0.035
4330 0.3-0.35 0.15-0.35 0.8-1.1 0.025 0.025 0.8-1.1 1.65-2.0 0.2-0.3 0.05-0.10 0.2 /
4621 0.18-0.23 0.17-0.37 0.7-0.9 0.025 0.025 0.35 1.65-2.0 0.2-0.3 / 0.2 /
4720 0.19-0.23 0.15-0.35 0.85-1.05 0.025 0.025 0.8-1.05 0.9-1.2 0.22-0.30 0.02-0.05 0.40-0.60 /
Sucker Rod Weight List
Size 5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-1/2"
kg/m 1.68 2.4 3.2 4.2 5.3 6.4 9.5
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