API 11b 7/8′′ Sucker Rods Couplings

• Customization: Available
• Connection: Female
• Structure: Vertical
• Model NO.: 3/4′′, 5/8′′, 7/8′′
• Flexible or Rigid: Rigid
• Material: Carbon Steel
• Standard: Standard
• Samples: Available
• Size: 3/4′′ & 5 /8′′ & 7/8′′
• Certificate: API 11b
• Transport Package: Wood Cases
• Specification: 7/8′′
• Trademark: ZS
• Origin: China, Henan
• HS Code: 84314310
• Production Capacity: 5000PCS/M

Product Description

                                         API 11B 7/8'' Sucker Rods Couplings

The sucker rod couplings are used for connecting sucker rods, polished rods and sinker bars. 
 -The main types of sucker rod couplings are sucker rod couplings, polished rod couplings and sub-couplings.
- All of the three types have two classes: class T(through-hardened)and class SM (sprayed metal).
-Material: carbon steel, alloy steel.
-Specification:5/8", 3/4", 7/8"1", 1 1/8"
 
The coupling blanks are formed or machined to size and tolerance, threaded using a cold-forming rolled thread tap and coated for anti-galling and lubrication properties.
 
 Class T couplings are recommended for installation where abrasion or corrosion-abrasion is not a problem.
Class SM couplings are recommended for abration or corrosion-abration position.


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 sizein 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
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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