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1. Introduction of Pony rod
The Pony rods are used to adjust the length of sucker rod string in oil well.
2. Manufacturing specification: API 11B
3. Material
3.1. Chemical Composition
The chemical composition of steel sucker rods and steel pony rods shall be any composition of AISI series steel , or equivalent ,listed in Table which can be effectively heat treated to the mechanical requirements of grades K.C. and D rods
Chemical Composition of Pony Rods
Grade | Chemical composition |
K | AISI 46XX series steel a |
C | AISI 10XX series steel a |
AISI 15XX series steel a | |
D carbon | AISI 10XX series steel a |
AISI 15XX series steel a | |
D alloy | AISI 41XX series steel a |
D special | Special alloy shall be any chemical composition that contains a combination of nickel, chromium , and molybdenum that total a minimum of 1.15% alloying content. |
Or an equivalent in international series number steel. | |
3.2. Mechanical Properties
Mechanical Properties of Steel Rods and Pony Rods
Grade | Minimum Yield (0.2% offset) | Minimum Tensile | Maximum Tensile | |||
psi | MPa | psi | MPa | psi | MPa | |
K | 60,000 | 414 | 90,000 | 621 | 115,000 | 793 |
C | 60,000 | 414 | 90,000 | 621 | 115,000 | 793 |
D | 85,000 | 586 | 115,000 | 793 | 140,000 | 965 |
1. Introduction of Pony rod
The Pony rods are used to adjust the length of sucker rod string in oil well.
2. Manufacturing specification: API 11B
3. Material
3.1. Chemical Composition
The chemical composition of steel sucker rods and steel pony rods shall be any composition of AISI series steel , or equivalent ,listed in Table which can be effectively heat treated to the mechanical requirements of grades K.C. and D rods
Chemical Composition of Pony Rods
Grade | Chemical composition |
K | AISI 46XX series steel a |
C | AISI 10XX series steel a |
AISI 15XX series steel a | |
D carbon | AISI 10XX series steel a |
AISI 15XX series steel a | |
D alloy | AISI 41XX series steel a |
D special | Special alloy shall be any chemical composition that contains a combination of nickel, chromium , and molybdenum that total a minimum of 1.15% alloying content. |
Or an equivalent in international series number steel. | |
3.2. Mechanical Properties
Mechanical Properties of Steel Rods and Pony Rods
Grade | Minimum Yield (0.2% offset) | Minimum Tensile | Maximum Tensile | |||
psi | MPa | psi | MPa | psi | MPa | |
K | 60,000 | 414 | 90,000 | 621 | 115,000 | 793 |
C | 60,000 | 414 | 90,000 | 621 | 115,000 | 793 |
D | 85,000 | 586 | 115,000 | 793 | 140,000 | 965 |
