| After-sales Service: | Provided |
|---|---|
| Warranty: | 1 Year or 2000hours |
| Manufacturing Process: | Casting |
| Surface Treatment: | Sand Blast |
| Operation Pressure: | Vacuum |
| Material: | Cast Steel |
| Customization: |
|---|
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Sucker rod connecting sleeve
API 11B sucker rod couplings include: T-class coupling, SM class coupling,
It is divided into full-size coupling and slim hole coupling according to diameter or purpose.
The main function of the sucker rod coupling is to connect the sucker rod with the sucker rod, and it can also protect the large shoulder surface of the sucker rod from being worn and prevent the sucker rod thread from failure.
Sucker Rod Couplings, Polished Rod Couplings, and Sub-couplings
C.1 Couplings
C.1.1 General
Sucker rod couplings, polished rod couplings, and sub-couplings shall be manufactured and supplied according to the
requirements provided in this specification and are used as connections for sucker rods, sinker bars, pony rods and
polished rods, as applicable.
Sucker rod couplings, polished rod couplings, and sub-couplings may be manufactured as Class T (throughhardened)
or Class SM (sprayed metal). Unless specified otherwise, the requirements listed below apply to both
classes.
C.1.2 Sucker Rod Couplings
Sucker rod couplings have the same box thread size in each end and are used for connecting sucker rods and/or
pony rods, and/or sinker bars with sucker rod threads. Dimensions shall conform to Table C.1 and Table C.2, Figure
C.1 and Figure C.2, as applicable.
NOTE The use of sucker rod couplings on polished rods will result in the failure of the polished rod pin or coupling.
C.1.3 Polished Rod Couplings
Polished rod couplings have the same box thread size in each end and are used for connecting the polished rod and/
or sinker bars with polished rod threads to the sucker rod string. Dimensions shall conform to Table C.1 and Table
C.2, and Figure C.1 and Figure C.3 as applicable.
C.1.4 Sub-couplings
Sub-couplings have different sizes of box threads in each end and are used for connecting two sizes of sucker rods or
a polished rod to a sucker rod string. External dimensions shall conform to Table C.1. Outside diameter (OD) and
other dimensions shall conform to the larger coupling thread in Table C.1. Sub-coupling thread dimensions shall
conform to Table C.2 and Figure C.3 as applicable.
Sub-couplings may be used on sucker rods or polished rods.
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