API 11B Sucker Rod

SUCKER ROD

Standard: API Spec 11B

Rod type: Sucker rod, Pony rod

API Grade: C, K, D( D carbon, D Alloy, D special)

Material: AISI A-4130-M, A-4140-M,A-4142-M, A-4330-M, A-4138-M etc

The sucker rod is a key component in the mechanical systems used for lifting oil from wells, particularly in beam pumping (or rod pumping) systems. It is a long, solid or hollow steel rod that connects the surface pumping unit to the downhole pump located at the bottom of the well. Sucker rods transfer the reciprocating motion from the surface pump jack to the downhole pump, enabling the extraction of oil to the surface.

OAK's sucker rods are made following standards like the latest API Specification 11B and AISI Steel Products. In production and quality control, OAK uses higher industry standards. The rods come from quality steel bars passing magnetic particle tests and straightening. When forging, the rod ends are heated in induction furnaces for better fatigue resistance. OAK will detail the rod types, API grades, materials, couplings, and technical specs. 

Key Features and Functions:

Material: Typically made of high-strength steel or fiberglass for durability and resistance to corrosion.

Design: Solid or hollow rods are connected in series to form a "sucker rod string," which can extend thousands of feet into the well.

Function: Transmits the up-and-down motion from the surface pump jack to the downhole pump, creating the suction needed to lift oil.

Applications: Primarily used in artificial lift systems for low-pressure or depleted oil wells where natural pressure is insufficient to bring oil to the surface.

Importance:

1. Essential for maintaining production in mature oil fields.

2. Requires regular maintenance due to wear and tear from cyclic loading and corrosive well environments.

Sucker rods are a critical part of the oil extraction process, especially in wells that rely on artificial lift methods.