Phone: +86-15030811699

Sucker Rod Couplings for Sucker Rod and Polished Rod

Introduction

The suck rod couplings are used for connecting sucker rods, polished rods and sinker bars. Material of the couplings is high quality carbon steel or alloy steel, which are conform to and exceed the requirements of API Specification 11B.

Production

  • The sucker rod couplings are manufactured in their own dedicated line.
  • Cleaned → prepared → loaded on mandrels → shot blasted → flame sprayed → induction fused.
  • The flame spray process is a computer controlled, menu driven operation that holds spray application
  • tolerance to within two thousandths of an inch.

Classification

  • The main types of sucker rod couplings are sucker rod couplings, polished rod couplings and sub-couplings.
    • Sucker rod couplings has same box thread size in both end.
    • The polished couplings are designed to connecting polished rod and sinker bars.
    • The sub-coupling is also called cross over coupling. It has different box thread size in both end.
    A sketch map of suck rod coupling.

    Sucker rod coupling has same box thread size in both end.

    A sketch map of sub-coupling.

    Sub-coupling has different box thread size in each end.

    A sketch map of polished rod coupling.

    Polished rod coupling has same box thread and vanish cone in both end.

  • All of the three types have two classes: class T and class SM.
    • The class T stands for Through-hardened.
    • The class SM stands for sprayed metal.
  • The outer diameter of the sucker rod couplings has full size and slim hole types.
  • According to the surface of the suck rod couplings, it can be divided into smooth surface suck rod couplings and suck rod couplings with two wrench square.
Four smooth surface sucker rod couplings on the gray background.

Smooth surface suck rod couplings.

Four sucker rod couplings with wrench square on the coupling body.

Sucker rod couplings with wrench square.

Specification

  • Material: high quality carbon steel or alloy steel. (AISI 1045, AISI 4135).
  • Thread size: 5/8", 3/4", 7/8", 1" and 1-1/8".
  • Length: 4", 4.5" and 5".
  • Grade: T and SM.
  • Type: sucker rod coupling, polished coupling and sub-coupling.

Sucker rod couplings specification

Item Spec Internal thread spec Length Outside diameter
Full size Slim hole
ESRC-01 5/8" 15/16" 4" 38.1mm 31.8mm
ESRC-02 3/4" 1-1/16" 4" 41.3mm 38.1mm
ESRC-03 7/8" 1-3/16" 4" 46mm 41.3mm
ESRC-04 1" 1-3/8" 4" 55.6mm 50.8mm
ESRC-05 1-1/8" 1-9/16" 4.5" 60.33mm N/M

Sub-couplings specifications

Item Spec Internal thread spec Length Outside diameter
Small end Big end Full size Slim hole
ESC-01 5/8" × 3/4" 15/16" 1-1/16" 4" 41.3mm 38.1mm
ESC-02 3/4" × 7/8" 1-1/16" 1-3/16" 4" 46mm 41.3mm
ESC-03 7/8" × 1" 1-3/16" 1-3/8" 4.5" 55.6mm 50.8mm
ESC-04 1" × 1-1/8" 1-3/8" 1-9/16" 5" 60.3mm N/M

Polished rod couplings

Item Spec Internal Thread Spec Length Outside Diameter Vanish Cone
Full Size Slim Hole
EPRC-01 5/8" 15/16" 4" 38.1mm 31.8mm
EPRC-02 3/4" 1-1/16" 4" 41.3mm 38.1mm
EPRC-03 7/8" 1-3/16" 4" 46mm 41.3mm
EPRC-04 1" 1-3/8" 4" 55.6mm 50.8mm
EPRC-05 1-1/8" 1-9/16" 4.5" 60.3mm N/M

Package

  • The sucker rod couplings have two type of package.
  • In plastic paper and carton.
  • In wooden box.
Several sucker rod couplings in the carton with plastic paper in the carton.

Sucker rod couplings in carton package.

Four wooden boxes in the container and fastened by the steel wire rope.

Sucker rod couplings in wooden box package.

Features

  • Good corrosion and wear resistance.
  • Black oxide coated for anti-galling and lubricating properties.
  • Automatic flame spray production minimize the tolerance.

Application

The sucker rod couplings are widely used in the oil industries for connection for sucker rod, polished rod, pony rod and sinker bars.

  • The sucker rod couplings are used for connecting the sucker rod and sinker bars with the same dimensions. But it is not used in the polished rods, which may cause the fracture of the couplings.
  • The polished couplings are designed to connect the polished rod and sinker bars.
  • The sub-coupling is widely used for the connection of different sizes of sucker rod, pony rod and sinker bars.

Inquiry for Our Product

Hengshui Haiwang Oil Thermal Recovery Equipment Co., Ltd.
E-mail: haiwang@sucker-rod.com

When you contact us, please provide your detail requirements.
That will help us give you a valid quotation.

Full Name *
Country Code * + Phone Number *
Message *