Lubricator

The Lubricator provides the downhole tool string with a pressure buffer zone and a transition zone through which the instrument passes. 
The Wireline Lubricator with Threaded Union is made up of sections of tubing material threaded on both ends to accept Quick Unions. It consists of 4 basic parts: a quick union collar, a male quick union, a lubricator tube, and a female quick union.  
An optional Bleed-off Port may be incorporated into the lubricator assembly. This involves a ported NPT-1/2" sub between the Lubricator tube and the bottom Quick Union.

Main Parameter

1) I.D. 
2) Working Pressure
3) Upper and Lower Union Required ( Bowen or Otis )
4) Service Environment ( STD or H2S )
5) Working Temperature