Pony rod:
1.A sucker rod, shorter than usual, used to make up a sucker rod string of desired length.
Pony rods are usually placed just below the polished rod.
2.
The rod joined to the connecting rod and piston rod in a mud pump
Pony rod:
1.A sucker rod, shorter than usual, used to make up a sucker rod string of desired length.
Pony rods are usually placed just below the polished rod.
2.
The rod joined to the connecting rod and piston rod in a mud pump