Product application
鈼?Function of Polish 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.
鈼?Main function
1. Combined with packing set in packing box to seal wellhead and prevent oil銆乬as銆亀ater disclosure.
2. Interim connector between sucker rod and mule head hanger.
3. Finishing indicator diagram test.
4. Complete various wellhead operation, such as pump striking, regulating pump setting.

Chemical composition
鈼?Type specification table
Nominal valueRod body diameter D
+0.127-0.254锛?0.005-0.010锛?br/> mm锛坕n)Length Lmm澹?50mm 锛圠ft 澹?2in)Thread nominal diameter mm锛坕n锛?/p>mm (in锛?Outer thread shoulder outer diameterSuitable sucker rod size mm (in)
2928. 6 (11/8锛?/p>2438, 3353, 4877, 6707, 7315, 7925
(8, 11. 16. 22. 24 , 26)24 锛?5/16锛?PR涓€16 (5/8)
27 锛? 1/16锛?PR涓€19 (3/4)
2928. 6 锛?1/8锛塺od-upset on one end2438, 3353, 4877, 6707 , 7315, 7925 (8. 11, 16. 22 , 24 , 26)24 (15/16 ) SR31.8+0.127-0.254 (1.250+0.005-0.010)16 (5/8)
27 (1 1/16 ) SR38.1+0.127-0.254 (1.500+0.005-0.010)19 (3/4)
3231.8锛? 1/4锛?/p>3353, 4877锛?,6707锛?315, 7925 , 9144, 10973
(11, 16, 22 . 24. 26, 30. 36)30 (1 3/16 ) PR涓€22(7/8)
3231.8锛? 1/4锛塺od-upset on one end3353, 4877锛?,6707锛?315, 7925 , 9144, 10973
(11, 16, 22 . 24. 26, 30. 36)30 (1 3/16 ) SR41.3+0.127-0.254 (1.625+0.005-0.010)22(7/8)
3838. 1 (1 1/2锛?/p>4877, 6707锛?315, 7925. 9144. 10973
(16, 22. 24, 26, 30. 36)35锛? 3/8锛塒R涓€25(1)
3838. 1 (1 1/2锛塺od-upset on one end4877, 6707锛?315, 7925. 9144. 10973
(16, 22. 24, 26, 30. 36)40锛? 9/16锛塖R57.2+0.381-0.381 (2.250+0.015-0.015)29(1 1/8)

鈼?Mechanical Property OF Steel Polished Rod
GRADEMinimum Yield Strength(0.2% Residual Deformation锛?/p>Minimum Tensile StrengthMaxmum Tensile StrengthElongation200mm%Reduction of Area Z%HRCHBFatigue Life

psiMPapsiMPapsiMPa鈮?3鈮?0//鈮?.0X106
C6000041490000621115000793鈮?3鈮?0///
D85000586115000793140000965鈮?3鈮?0///
KD85000590115000795140000965鈮?3鈮?0///
H1150007951400009651733391195鈮?3鈮?5///
EHL//18850013002175001500//鈮?0鈮?20鈮?.5X106
Note: When the minimum yield strength cannot be measured, it should be considered to be processed into standard sample and install extensometer to measure.

A It is generally made of high quality carbon steel, which can reach the mechanical properties of the table
b A molybdenum steel (but not limited to this type of steel) is generally used, and the effective heat treatment can achieve the mechanical properties of this table

鈼?Chemical Composition OF Commonly Used Sucker Rod
AISICSiMnPSCrNiMoVCuAl
41300.26-0.330.17-0.370.4-0.7鈮?.025鈮?.0250.8-1.1鈮?.30.15-0.25/鈮?.2/
41400.38-0.450.17-0.370.5-0.8鈮?.025鈮?.0250.9-1.2鈮?.30.15-0.250.04-0.09鈮?.2/
41420.38-0.450.17-0.370.5-0.8鈮?.025鈮?.0250.9-1.2鈮?.30.15-0.250.04-0.09鈮?.2/
43300.3-0.350.15-0.350.8-1.1鈮?.025鈮?.0250.8-1.11.65-2.00.2-0.30.05-0.10鈮?.2/
47200.19-0.230.15-0.350.85-1.05鈮?.025鈮?.0250.8-1.050.9-1.20.22-0.300.02-0.050.40-0.60

/Customized Polished Rod
website:http://www.china-found.com/sucker-rod/polished-rod/