Filter on Gas line to Injection Well
Filter on Gas line to Injection Well
(OP)
Produced natural gas at a pressure of 2000 psig needs to be injected in a gas well to maintain pressure. Two Ariel compressors are in Series to raise the produced natural gas pressure from 300 psig to 2200 psig.
Is it a normal practice to install a filter before the wing valve of the well to trap the line corrosion particles? It is understandble to put a temporary stainer for startup to trap the deberies in the line. If filter is required, what micron filter to be installed? Please guide,
Is it a normal practice to install a filter before the wing valve of the well to trap the line corrosion particles? It is understandble to put a temporary stainer for startup to trap the deberies in the line. If filter is required, what micron filter to be installed? Please guide,





RE: Filter on Gas line to Injection Well
RE: Filter on Gas line to Injection Well
khanag@bp.com
RE: Filter on Gas line to Injection Well
RE: Filter on Gas line to Injection Well
Two: Consider a more expensive, non slam check valve.
Regards
OleF
RE: Filter on Gas line to Injection Well
The gas fed to the compressor is already filterd and I agree to your point that compressor is more sensitive than the well. There are two resons that we were thinking of:
1) to trap the line conteminents (rust particles and small debries).
2 to trap the heavy ends in case these are condensed.
However, I have now decided to put basket strainer to trap the debries during commissioning period. I am looking for a manufacturar that manufactures 1500 # rating basket strainer. If you can recommend one, will be appreciated.
Thanks
RE: Filter on Gas line to Injection Well
1. Nobody knows if the strainer is in there :-/ (yes, it's true)
2. High pressure rating means heavy parts.
3. Such system are often fire proofed which makes it even more cumbersome to clean the strainer.
4. One more leakage source
For the trapping of debris in a new line, I totally agree - you never know what is in there - somebody might have forgotten a welder.
For the heavy ends I do not agree, just adjust the aftercooler so it doesn't knock out liquids, and what is the consequence of knocking out some heavy ends? Are your velocities that high?
Regards
OleF
RE: Filter on Gas line to Injection Well
I agree to your first point and that is the main reason to have some kind of protection for commissioning the line. Your second point also valid and justified but considering the length of the line to around 3 to 4 KM one can not be sure if there is liquid or not.
TD2K: I did recieve your 3-phase separator article and will go through during the weekend. Thanks