The closing time of annular BOP preventers The main disadvantage of the annular preventer in a drilling rig is the time required to close it. The annular preventer takes three to ten times the fluid volum.
[pdf] Solutions: Inspect the system for leaks, replace clogged filters, and check for worn parts like seals or rotors. Possible Causes: Loose components, bearing wear, or improper alignment. Solutions: Tighten loose components, inspect bearings, and ensure proper alignment of moving parts.
[pdf] Each screw machine must be equipped with a gas storage tank and, if needed, auxiliary equipment such as a cold dryer and a filter. The installation requirements are as follows: A) The installation sequence of supporting equipment is: “air compressor → gas tank → gas-water separator → cold dryer.”
[pdf] 
