RE: Rocket Emoji 🚀28 Feb 2024 08:48
Does our resident rigpig expert Flip Flop Joe not know about reverse circulation and what it does?
It seems clear to me from the Schlumberger glossary reverse circulation is purely a means of clearing out the well debris, which our friend Joe should have known being a rig worker 🤔 As such, in layman's terms, it would mean during the clean up the well is depressurised which then means the gasses are able to flow to surface. As Sean Scott stated at the recent explorers conference
7:30minutes into the video https://youtu.be/ndzxEUAQlaI?si=j-phzqUqp3glyxw8
"HeliumOne..... Had High Helium content (4.7%) As they depressurised their well they had Helium exsolving from the water and flowing to the surface as well
From Shlumberger
https://glossary.slb.com/terms/r/reverse_circulation#:~:text=The%20intentional%20pumping%20of%20wellbore,fluid%20circulation%20in%20a%20wellbore.
"reverse circulation
1. n. [Drilling]
The intentional pumping of wellbore fluids down the annulus and back up through the drillpipe. This is the opposite of the normal direction of fluid circulation in a wellbore. Since the inside volume of the drillpipe is considerably less than the volume of the annulus outside of the drillpipe, reverse circulation can bring bottomhole fluids to the surface faster than normal circulation for a given flow rate. Two potential hazards of reverse circulation include lifting cuttings and other junk into the drillstring and the rapid flow of reservoir fluids to the surface in a kick situation.
Synonyms: back wash, reversing out
See: cuttings, displacement, junk
2. vb. [Well Completions]
To circulate fluid down the wellbore annulus, with returns being made up the tubing string. Reverse circulation is often used to remove debris from the wellbore since the high fluid flow rate inside the tubing string enables the recovery of large or dense debris particles that are difficult or impossible to remove with conventional circulation.
Synonyms: back wash, reversing out"
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