Polish rod

Short Description:

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.

Send email to us

Product Detail

Product Tags

Product Specification

1.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.

2.Main function:

Combined with packing set in packing box to seal wellhead and prevent oil、gas、water disclosure.

Interim connector between sucker rod and mule head hanger

Finishing indicator diagram test.

Complete various wellhead operation, such as pump striking, regulating pump setting.

Type specification table

Nominal value	Rod body diameter D +0.127-0.254（+0.005-0.010） mm（in)	Length Lmm士 50mm （Lft 士 2in)	Thread nominal diameter mm（in）	mm (in） Outer thread shoulder outer diameter	Suitable sucker rod size mm (in)
29	28. 6 (11/8）	2438, 3353, 4877, 6707, 7315, 7925 (8, 11. 16. 22. 24 , 26)	24 （15/16） PR	一	16 (5/8)
29	28. 6 (11/8）	2438, 3353, 4877, 6707, 7315, 7925 (8, 11. 16. 22. 24 , 26)	27 （1 1/16） PR	一	19 (3/4)
29	28. 6 （11/8）rod-upset on one end	2438, 3353, 4877, 6707 , 7315, 7925 (8. 11, 16. 22 , 24 , 26)	24 (15/16 ) SR	31.8+0.127-0.254 (1.250+0.005-0.010)	16 (5/8)
29	28. 6 （11/8）rod-upset on one end		27 (1 1/16 ) SR	38.1+0.127-0.254 (1.500+0.005-0.010)	19 (3/4)
32	31.8（1 1/4）	3353, 4877， ,6707，7315, 7925 , 9144, 10973 (11, 16, 22 . 24. 26, 30. 36)	30 (1 3/16 ) PR	一	22(7/8)
32	31.8（1 1/4）rod-upset on one end	3353, 4877， ,6707，7315, 7925 , 9144, 10973 (11, 16, 22 . 24. 26, 30. 36)	30 (1 3/16 ) SR	41.3+0.127-0.254 (1.625+0.005-0.010)	22(7/8)
38	38. 1 (1 1/2）	4877, 6707，7315, 7925. 9144. 10973 (16, 22. 24, 26, 30. 36)	35（1 3/8）PR	一	25(1)
38	38. 1 (1 1/2）rod-upset on one end	4877, 6707，7315, 7925. 9144. 10973 (16, 22. 24, 26, 30. 36)	40（1 9/16）SR	57.2+0.381-0.381 (2.250+0.015-0.015)	29(1 1/8)

● Mechanical Property OF Steel Polished Rod

GRADE	Minimum Yield Strength(0.2% Residual Deformation）		Minimum Tensile Strength		Maximum Tensile Strength		Elongation200mm%	Reduction of Area Z%	HRC	HB	Fatigue Life
	psi	MPa	psi	MPa	psi	MPa	≥13	≥50	/	/	≥1.0X106
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	/	/	/
H	115000	795	140000	965	173339	1195	≥13	≥45	/	/	/
EHL	/	/	188500	1300	217500	1500	/	/	≥50	≥320	≥2.5X106
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

● Chemical Composition OF Commonly Used Sucker Rod

AISI	C	Si	Mn	P	S	Cr	Ni	Mo	V	Cu	Al
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	/
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	/
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	/
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	/