Flow Control 2 (Nipples)

[Jriad]

What is the difference between an 'X' , 'XN', & 'PSN' Nipples and what are the differences in applications?

 

[DrillerNic]

Different manufacturers (and so different keys to lock into the different nipples) that all. The XN nipple is a no-go compared to the X nipple and should always be the bottom nipple in a completion string.

I've never heard of a PSN nipple though. Ask your local slickline company for more information.

 

[JAFCO]

X Nipple is an Otis flow control nipple with a locking profile and a seal surface

XN nipple is an Otis Flow control nipple with a locking profile, seal surface and a bottom No-Go ring to prevent blanking plugs from falling thro the nipple

Otis Blanking plugs are ran in two pieces, the body is set into the nipple, then the Prong is set into the plug body.

A PSN is a Pump Seating Nipple - ususally these nipples do not have any profiles in them, only a seal surface - When a Bottom hole pump is run the hold down rings seal with a friction fit into the PSN .

 

[Jriad]

What are some classic applications where u would use a X opposed to an XN and vice versa?

 

[JAFCO]

In a simple completion - tubing with a profile I would only run an XN.

as the need for more profiles in a more complex completion I would run multiple X nipples above the XN.
- example: 2 zone completion XN nipple, Packer, On/off c/w X profile, Pup joint, X nipple, 10 joints tbg, 1 blast joint, Sliding sleeve c/w X profile