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OK - guessing from what I've read on DST procedure, we're currently locked down, mud weighted and ready to test?
No losses, DST string in place and BOP closed?
I.e. if testing is being undertaken then the test area is packed meaning no mud is lost.
But I'm no oil drilling expert.
adoubleuk,
Thanks, and understood. I was only giving a quick and simple response to Slip as it seemed like that's all he was seeking. More than happy for someone else to step in after with a more comprehensive explanation (in Swaheelee!) :)
AlfaMale,
" I appreciate less the attitude in the communication of such!"
OK, apologise if I offended. The thing is, you're new here, even though you have a good number of other posts to your name, and these O&G boards sometimes get some people appearing who claim to know their oilfield stuff but in fact know nowt.
Let's just say that your post could have been... misleading...
Sounds very encouraging SoB and aduk.
Is that good SOFB!?
adoubleuk,
I appreciate the in-depth industry knowledge evident in your response, and understand what you wrote. However, I appreciate less the attitude in the communication of such!
SotB,
OK. 10-4. WOW.
ADUK:::: The answer is None and closed.
take a wider view markets are at a 7 year
high talk of resesesion? I for one hope our CFO
does'nt get gung hoe and
in the words of frank sinatra
DO SOME THING STUPID
"The safety vessel will be out there in all weather, at all times" - nope, not quite correct, there will be times when the conditions WoS will dictate that even the safety vessels will be sent in if the weather is bad enough (15m + waves etc), which does happen from time to time. In those conditions, I am led to believe that the assett will batten down the hatches and in the case of most FPSO, they will carry on producing.
More than happy to be challenged on the above but you will be wrong :-)
I doubt that the conditions WoS just now are more than a bit of a swell, a light breeze and a sig' wave height that is no more than 3 or 4m.
The question was when does it occur? during drilling or pulling out of hole?
The given response was proportionate and correct. Not every question requires a war and peace response [nor being mocked]
slipanchor,
"Thanks for your explanation, but you might as well have been typing in Swaheelee it was all above my head."
That's no problem. I only went into a bit of detail in the hope that AlfaMale might read it. Saying that losses only happen while drilling is like saying it's OK pointing a gun at someone because you think it's unloaded.
Wellwell,
"Good explanation AK-a little bit harsh though. His answer was correct in the context of the question."
I disagree. No it wasn't. And what's 'the context' ????? If the rig is still latched onto the BOP, and the well 'open', they'll (hopefully) still be experiencing fluid losses. If, however, the DST string is already in the hole but hung off and with the BOP closed, it won't be the case. However I don't know if that's the case at present.
Sorry (no, I'm not, really, not at all), but saying that losses only occur while drilling is downright 'go to the back of the class' wrong. That kind of thinking is what gets rigs burnt down.
adoubleuk
Thanks for your explanation, but you might as well have been typing in Swaheelee it was all above my head.
Good explanation AK-a little bit harsh though. His answer was correct in the context of the question.
Cebo (and Slip, for info),
"Slip, pretty sure the Esvagt Claudine is the standby rescue vessel for the TL, and she looks to be still on location."
Yes, roger, roger. The 'safety vessel' will be out there in all weathers at all times. Things have changed since the 70's and early 80's when safety vessel regulations were implemented, and many of them were just 'converted' out-of-work N.Sea trawlers. It could be quite frightening watching from the rig the 'plight' of such old boats, stuck out in weather which had they been fishing, they'd have run for port days beforehand.
The topic takes me back to the winter of 2016 / 2017, when things were 'exciting', and the TO Spitzbergen was waiting on weather to move from Lincoln to Halifax, and a lot of discussion on this BB was 'operational technical', rather than 'financial technical'. Happy days. A video appeared on youtube, which many felt might have been shot on the bridge of the Esvagt Celina, working for HUR, in a big storm. It was good stuff! But the video was 'disappeared' a couple of months later.
However (just checked), this priceless clip is still there...
https://www.youtube.com/watch?v=gPy2DHHnlqQ
Slip, pretty sure the Esvagt Claudine is the standby rescue vessel for the TL, and she looks to be still on location.
From Slipanchor.
"When does the actual mud losses take place, while drilling the horizontal through the fractures, or when the drilling string is removed?"
From AlfaMale.
"Whilst drilling."
AlfaMale, your answer is totally wrong and incorrect. If the formation is taking fluid, in 99% of cases it will continue to do so all the time, unless some sort of LCM has been added. (Not the case in HUR's operations to my knowledge.) It's true that while drilling, losses may be greater, due to ECD, (equivalent circulating density) which is too complicated to explain here in depth, but simplified, means that while drilling the fluid (in 'circulation') exerts a higher pressure on the formation due to friction-losses (backpressure) in the annulus.
But even when the well is open to the formation, the fluid not being 'circulated', losses will continue unless the fluid is in perfect 'balance' with formation pressure. These are called 'static losses', and are monitored frequently, and the hole is kept 'topped-up' to compensate.
Obviously, if one ends up waiting on weather for any length of time, with the hole experiencing static losses, more fluid has to be mixed or obtained to keep things 'topped-up', and maintaining safe pressure-control over things.
Hurricane will not have been drilling 'on balance', if for no other reason than regulations, even though WW is appraisal rather than exploration, so they'll have been using lighter fluid than on WD. And the rig's not equipped with MPD, which would allow them to do so. Ergo, if they were experiencing losses while drilling, they'll continue to do so with the well 'static', just to a lesser extent.
Slip,
I have no idea, other than to suggest that perhaps they are both in port due to adverse weather conditions?
Slip they will have a stanby vessel there at all times - for further info check out either the ERRVA guidelines and no doubt some ACOP to help compliance and Safety Case Regs.
AlfaMale
Cheers Alfa, another question if you don't mind.
Is it common practice for the two offshore supply vessels to be in port away from the Rig at the same time. Or is it that the requirements are just to much for one vessel to handle?
Whilst drilling.
When does the actual mud losses take place, while drilling the horizontal through the fractures, or when the drilling string is removed?
Rainbow
Mud losses are not a function of the balance, it is a fact of life in a connected FB reservoir. So WD had only small losses bcos the fracture network was not well connected. So high losses are good, regardless of mud weight.
I agree with Biffa, things seem tight this time, so no news on that front.