1. Introduction
The polished rod is intended for the connection of the rod strings using a casing head stuffing box with a pumping unit and the transmission of the forth or rotational movement from the PCP drive head to the well pump during oil extraction.
The polished rods are the metal core with round section, manufactured from high quality alloy steel, with high tensile strength, smooth surface and long service life. The polished rod is produced in accordance with API Spec 11B. The polished rod is mainly having two types: 1) regular grade D polished rod and 2) end upsetting polished rod. The regular grade D polished rods are connected by the polished rod coupling, while the end upsetting polished rods are connected to the sucker rod directly for usage.
Regular polished rod
End upsetting polished rod
There is another type of polished rod, which has ultra-high tensile strength, long stoke and corrosion resistant. This type of sucker rod is made of 20CrMo alloy steel. It is heat treated by quenching and tempering and the rod surface is metal sprayed with nickel-based alloy (Ni35) to make the rod be better resistance to the corrosion and wear.
2. Specification
Material: 20CrMo, stainless steel rod.
Type: regular polished rod, end upsetting polished rod.
Rod diameter: 1", 1-1/8", 1-1/4", 1-1/2".
Length: 25', 26' and 30'.
Specification of Regular Polished Rod
Specification of End Upsetting Polished Rod
3. Application
- Polished rod is mainly used for connecting between the pumping unit and rod string in the oil well.
- The regular grade D polished rod is not used for high corrosion environments.
- The end upsetting polished rod can be used combined with sucker rod for usage.
- The corrosion resistant polished rod is used for pumping crude oil in deep wells, large displacement wells, thickened oil well and high corrosion wells.
4. Package & Container
Package
The packaging of polished rod very strict, which have 7 layers of package in total:
Polished - anti-rust oil - plastic film - aluminum film bag - adhesive tape - single wall corrugated - packed into bundle
Painting anti-rust oil
Plastic film package of the polished rod
Wooden box package of the polished rod
Container
The loading container of the polished rod mainly use 40' OT (40' open top container) and 40' GP (40' general purpose container).
Polished rod in open top container
