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Havila Borg at Peterhead port presently
yes, am surprised Gapingfracture - every day a schoolday, thanks. I guess takeup of new capabilities isn't necessarily needed if the old one is doing the job adequately.
Still hoping for some good news over the next week or so..........
Prepare to be surprised SG2.
Everyone uses "mud pulse telemetry". Including hurricane. Electromagnetic is used in some places but thats uncommon and notmally when drilling with air when you cant get a mud signal.
AFAIK hurricane run halliburton Geopilot rotary steerables to take care of directional, or at least they used to.
Aduk: "Come pay me a visit, (you'll be welcome!) and I'll try to explain. But it'll take at least two days to scratch the surface, and lots of beer."
Thank you. Yeah that would be good. Two days of beer drinking/research. Can you get a grant for that?
Hopefully if you copy & search these it should find the video.
you tube com / watch?v=nIAsf1g6wQE
you tube com / watch?v=9TEyYRAu2Uk
you tube com / watch?v=2upE6beTMkg
youtube com / watch?v=BqGq1vP9sMc
standard princess came back from rig was in Aberdeen for a few hours now sailed off to Sweden.
anyway psv vessel now needed awaiting name
Hurricane Energy Plc
7 Days firm + 14 x 1 daily options
1 x PSV
Between 28/06/19 and 29/06/19
...at the end of the well drilling phase, the operator runs a gyro survey to help ensure AH => TVD depths are known in case need to ‘find’ well. Can be out by easily 25ft TVD pre-gyro.
copy the below, just remove all the spaces and put dots around you tube
www you tube com / watch ? v= nIAsf1g6wQE
The (copyright?) 'Intelliserve' kit looks neat. But i think AK's on the right track here regarding reliability of such systems - it doesn't look like it would be especially durable in such a harsh environment.
However, regarding others: 'Mud telemetry' (= sonar in a fluid) transmits at a speed directly proportional to fluid density (so - wag - about 1700 metres/sec in mud ; depending on the fluids visco-elastic properties losses of signal occur. I'd be surprised, however, if direct mechanical transmission via the steel pipe isn't being used: (i) the speed of sound in the steel is much higher (around 6000 metres/sec) (ii) the data-rate due to faster sos is higher and (iii) the reliability of the transmission 'media' (screwed-up piped) is very high. As AK comments, 'noise' gets to be an issue, but a decent transducer + signal-processing setup can sort that out no problem. And this suff can be made 'hard'. Really 'hard'. I'd be surprised if this latter method was not in widespread use.
ThanksJP47, fascinating stuff. I was wondering how they know where the drill bit is, in real time.
"Mud Pulse Telemetry" : Phrase of the day.
Regarding the links in my previous post, the system has removed the "www.youtube.com" from where it says link removed. Don't know why it would do that. Others have posted links to the website successfully.
I've tried adding exclamation marks this time. Anyone any idea why it's doing this?
I think Hurricane will be using a Rotary Steerable System which either pushes or points the bit in the required direction. See links to videos.The current maximum build up rates for standard systems are in the range of 6 to 12 deg/100 ft although special application tools are available for higher rates. I don't know what build rates Hur are using though. The profile will vary from well to well depending on the relative surface and target position and depth. Probably below 4 deg/100ft I would imagine. I've also included a link to a basic explanation of mud pulse telemetry which is the method of communication to and from the downhole tools used by the vast majority of the systems today.
Interesting, maybe send signals then down to the drill bit via the 95ft pipe sections itself, ie for example I have an internet connection to my TV via the 13amp Power cables in my house, ie just plug in a receiver into any 13 Amp plug socket and that provides an internet connection.
Cannot the same methodology be applied here?
"Fibre Optics, cable ? why radio?"
'Smart pipe' exists.
But the thing is, during the drilling process, numerous sectins of pipe have to be joined together. So if you're thinking fibre-optic, think of joining one bit to the next in 95-foot sections... One connection doesn't work, and comms are lost.
Far smarter minds than my own are still working on this, but progress is slow, and such technologies are a long way from being the norm so far.
Drilling rock creates all sorts of nasty vibrations, the forces are great, etc.. What works for smartphones can get instantly destroyed in that underground environment.
Double I think a beer with you would be very interesting experience,
Oh dam. Last post unedited.
Radius? 3.5 or 4 degrees 'buildup' per hundred foot drilled.
Dunno if they're using 'rotary steerable' these days or sticking with 'bent-housing mud motors' like on Lanc 6. Suspect the former, though.
Re:' Plus control data / reception and likewise is complicated, 'cos radio doesn't work through thousands of feet of rock.'
Fibre Optics, cable ? why radio?
"How do they get the drill bit to turn away from vertical and how do they control it's direction/incline? I can't fathom how it's possible. What kind of radius are we talking about?"
Hey! Wordspace on this BB is 2999 characters. Multiply that by ten, and someone might be able to reply to you with a very basic 'primer'.
There must be stuff on youtube, however.
Interesting you mention 'radius', though. Hurricane (from what one can see) is using a fairly 'standard' 4 degree buildup from vertical to horizontal. Nothing too severe.
HOW it's done? Think rocket-science, avionics, and so on, but in a far harsher medium than air or vacuum. Plus control data / reception and likewise is complicated, 'cos radio doesn't work through thousands of feet of rock.
Come pay me a visit, (you'll be welcome!) and I'll try to explain. But it'll take at least two days to scratch the surface, and lots of beer.
Interesting you mention radius,
Pish day for me. Got home from work to find a forgotten stop loss ( set in the heady days of 59/60p) has sold all my HUR shares at 52.9 effing pence! And on a blue day too.
WTF happened to the share price today! Now what? Hope I can get back in without too much pain tomorrow. (after I finish kicking myself)
Thanks JayKay and Heidhoncho, I found info using the search terms you suggest.
Didn't realise how much wider the drill bit is than the stem. Allows "wiggle" room. Clever stuff. This video is good:
wulbert, in relation to your question regarding the radius, and very rule of thumb general statement regarding deviated wells, although temporarily (it will be steered back to reduce it) it may be as high as 4-4.5 degrees, it would most likely be planned to be 3 degrees per 100 feet, as dogleg severity greater than that is decidedly sub optimal, and can become the cause for sticking issues and casing wear.
You might want to Google bent motor.
Just google 'directional oil well drilling', plenty of stuff out there, although I'm sure AK has got a couple of the better YouTube videos bookmarked and will be along shortly with the appropriate links ;o)
Maybe a daft question, but how exactly do you drill a horizontal hole?
How do they get the drill bit to turn away from vertical and how do they control it's direction/incline? I can't fathom how it's possible. What kind of radius are we talking about?