Introduction

Sucker rod is the common equipment in the oil extraction. It is manufactured through many process including the testing, straightening and forging. The sucker rod is placed between the polished rod and oil well pump. To deliver power. Sucker rod is manufactured from high quality carbon steel and alloy steel, which is conform to the API Spec 11B standard. Sucker rod has various types including the common sucker rod, hollow sucker rod and FRP sucker rod. Commonly we use the sucker rod coupling to connect the sucker rod. The sucker rod also has various specs to fit different environments and applications.

Classification

The sucker rod has various types:

• Common sucker rod
  • Grade C sucker rod.
  • Grade D sucker rod.
  • Grade K sucker rod.
  • Grade KD sucker rod.
• High tensile sucker rod: grade H sucker rod
  • Grade HY sucker rod.
  • Grade HL sucker rod.
  • Grade KHL sucker rod.
• Special sucker rod: hollow sucker rod
• Continuous sucker rod.
• Screw pump sucker rod
  • Taper thread sucker rod
  • Plug sucker rod.
• FRP sucker rod: fiber reinforced plastic sucker rod
• Flexible sucker rod
  • Carbon fiber composite sucker rod
  • Steel wire rope sucker rod.
• Electric sucker rod

Mechanical sheet of the different grade sucker rod
Item	Grade	Tensile strength MPa	Yield strength MPa	Percentage elongation %	Contraction percentage of area %
ESRM-01	C	620 - 795	≥ 415	≥ 13	≥ 50
ESRM-02	K	620 - 795	≥ 415	≥ 13	≥ 60
ESRM-03	D	795 - 965	≥ 590	≥ 10	≥ 50
ESRM-04	KD	795 - 965	≥ 590	≥ 10	≥ 50
ESRM-05	HL	965 - 1195	≥ 795	≥ 10	≥ 45
ESRM-06	HY	965 - 1195	N/M	N/M	N/M

Specification

• Material: high quality carbon steel or alloy steel.
• Grade: C, D, K, H.
• Rod diameter: 5/8", 3/4", 7/8", 1" and 1-1/4".
• Length:
  • 25', 26' and 30' for sucker rod.
  • 2', 4', 6', 8', 10' for pony rod.

Item	Size	Rod D.	Thread D.	Length	O.D. of pin shoulder	Length of pin	Wrench square size
							Length	width
ESRS-01	5/8"	5/8"	5/8"	2' / 4' / 6' / 8' / 10' / 25' / 30'	31.75mm	31.75mm	≥ 31.75mm	22.23mm
ESRS-02	3/4"	3/4"	3/4"		38.10mm	36.51mm	≥ 31.75mm	25.40mm
ESRS-03	7/8"	7/8"	7/8"		41.28mm	41.28mm	≥ 31.75mm	25.40mm
ESRS-04	1"	1"	1"		50.80mm	47.63mm	≥ 38.10mm	33.34mm
ESRS-05	1-1/8"	1-1/8"	1-1/8"		57.15mm	53.98mm	≥ 41.28mm	38.10mm

Production

• For common sucker rod:
  Raw Material Test → Cold Straighten → Cut → Forge → Hot Treatment → Hot Alignment → Shot Blasting → Rod Head Machining → Assembly → Protective Cap → Package → Aczoiling Treatment.
• For extra high tensile sucker rod:
  Raw Material Test → Cold Straighten → Cut → Forge → Quenched And Tempered → Hot Treatment → Hot Alignment → Shot Blasting → Rod Head Machining → Surface Quenched → Assembly → Protective Cap → Package → Aczoiling Treatment.

Package and loading

• Package:
  • Metal pallet for saving space and convenient to transport.
  • Plastic paper covering the sucker rod and metal box covering the rod head and then metal pallet for better corrosion and abrasion resistance.
• Pallet size (L × W× H):
  • 7930mm × 550mm × 330mm
  • 8300mm × 550mm × 330mm
  • 9440mm × 550mm × 330mm
• Container size:
  • 40' GP (40' general purpose container).
  • 40' OT (40' open top container).

Item	Dimension	Length Ft.	Pieces/ bundle	Net weight KG	Gross weight KG	Total pieces
ESRP-01	5/8"	25'	150	1930	1938	1920
ESRP-02		26'	150	1945	1953	1920
ESRP-03		30'	150	2210	2218	1690
ESRP-04	3/4"	25'	100	1850	1858	1345
ESRP-05		26'	100	1865	1873	1334
ESRP-06		30'	100	2120	2128	1174
ESRP-07	7/8"	25'	80	1920	1925	1039
ESRP-08		26'	80	2012	2017	991
ESRP-09		30'	80	2290	2290	897
ESRP-10	1"	25'	60	1915	1923	780
ESRP-11		26'	60	2006	2014	744
ESRP-12		30'	60	2278	2283	657
ESRP-13	1-1/8"	25'	50	2044	2052	609
ESRP-14		26'	50	2135	2143	583
ESRP-15		30'	50	2392	2398	521f

Item	Dimension	Length Ft.	Pieces/ bundle	Net weight KG	Gross weight KG	Total pieces
ESRP-01	5/8"	25'	150	1930	1938	1920
ESRP-02		26'	150	1945	1953	1920
ESRP-03		30'	150	2210	2218	1690
ESRP-04	3/4"	25'	100	1850	1858	1345
ESRP-05		26'	100	1865	1873	1334
ESRP-06		30'	100	2120	2128	1174
ESRP-07	7/8"	25'	80	1920	1925	1039
ESRP-08		26'	80	2012	2017	991
ESRP-09		30'	80	2290	2290	897
ESRP-10	1"	25'	60	1915	1923	780
ESRP-11		26'	60	2006	2014	744
ESRP-12		30'	60	2278	2283	657
ESRP-13	1-1/8"	25'	50	2044	2052	609
ESRP-14		26'	50	2135	2143	583
ESRP-15		30'	50	2392	2398	521

Features

• Various grade to fit different requirements.
• Various types to satisfy different environments.
• Angle steel and bolts package for convenient transport and saving space.
• Plastic or metal sucker rod protectors to protect the threads.
• Plastic paper and metal box to resist the corrosion and abrasion.
• Special specifications can be customized.

Applications

The sucker rod is widely used in the oil extraction industries. The different grade sucker rod can be applied in different applications.

• Grade C sucker rod: Moderate strength, has a certain degree of resistance to the sulfide stress cracking, it is suitable for sour environments.
• Grade D sucker rod: The grade D sucker rod is manufactured from high quality heat treated steel alloy, which has high tensile and yield strength, it is can be used in the non-corroding or mildly corroding environments.
• Grade K sucker rod: The grade K sucker rod has a good corrosion resistance in H2S, CO2, and NaCl media, it is widely used in corrosion environments.
• Grade H sucker rod: This is a type of sucker rod with extra high tensile strength it is ideal for deep and large wells.