English: top of wireline. tools that are lowered into well are kept in here. this tubing provide pressure control when running tools
It is called a lubricator. It allows the crew to equalize the pressure before entering the well.
This work has been released into the public domain by its author, Dexcel at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: Dexcel grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse
Original upload log
The original description page was here. All following user names refer to en.wikipedia.