Underground boreing

[ozwinner]

Ok guys,
Just how do they check, or even get their levels when underground boreing.
We are getting natural gas, Yeah,...:) ....and they have put in most of the pipes useing undergroung boreing.
I have noticed that everywhere they have done it, paint on the roads etc like, 1.5M, 1.2M, 1M.

Soooooo, how do they control the machine to get the pipes exactly where they want them? :confused:

Al :)

[echnidna]

They imported some welsh rabbits who have been trained by the coalminers.
They dig a pilot hole for the machine. The machine operators keep quiet about it in case someone fancies some of their welsh rarebit.

[beejay1]

Hi Al.
Maybe the attached will help. Dont understand it much myself but i think radiowaves and lazers paly a part. seem to recall when they were planning the Channel tunnel, satelite was used in the planning as well.

http://www.directionaldrilling.com/drillmasterreports.php?report=8_02

beejay1

http://community.webshots.com/user/eunos9

[ozwinner]

Thanks BJ

But these rigs are nowhere near the computer age, stone age maybe.

Al :D

[MajorPanic]

Who cares, as long as you get it?

Ask someone who's boring, they will probably know :confused:

Augers well for a good outcome :D :eek: ;)

[Zed]

when a telco want so check whos cable are underground (ok... well SOMEONES CABLES) they use a "thingy" .
You cant guess which one unless you dig it up and suss it out for markings (or put someone off the air!!!)

anyway they use a thing that for lack of a betterer term is like a depth sounder / radar thingy that can detect metal and stuff underground - its so accurate you can actually tell how deep something is down to about 10mm. I personally have plotted cables under roads and such and can follow the profile to such a degree to where you can detech "oh.. here we go, this is where we go under the other one, see its just given a signal that indicates a 90 degre cross... yep thats it allright, its 1.6m here and 1.8 here and 2.0 here, thus the gradient is 1:6. etc...."

in foren, um foreighn, err foreign countries they use hamsters, gerbils etc, in the really poor counties they use rats.

[beejay1]

gettin really bored with this thread nowhttp://www.woodworkforums.ubeaut.com.au/images/icons/icon10.gifhttp://www.woodworkforums.ubeaut.com.au/images/icons/icon10.gifbeejay1

http://community.webshots.com/user/eunos9

[bitingmidge]

You'll notice that none of the people operating the rig wear foilies.

:eek: :eek: :eek:

Be CAREFUL Al.

P
:cool:

[Guy]

The first stem is to call 1100 dial before you dig, they will send out drawings from every utility that responds. The borers then go out and mark the road etc with that info.
The directional boring head starts its downward drive into the ground and the operator has a probe that he walks along the desired path with a preset depth. As he walks along the drill head follows at the depth they wish to bore at, once at the other end they remove the drill head and attatch the pipe, they then pull the pipe back.
The probe unit usually has all the depths preset in for the route,
Last job we did half melb CDB like this

[ozwinner]

Freakin hyjackers. :(


Al :(

[bitingmidge]

The probe unit usually has all the depths preset in for the route,


See Al, I TOLD you they were aliens!!

Cheers,

P :D

[Bob Willson]

What does it matter Al, so long as you're getting your pipes laid. :D

Personally, I think they do it all with magnets.

[macca2]

The boring head has an inbuilt transponder and the guy up top can tell the depth and direction by placing the locator over where the drill head is.
The head has a chisel point on one side and by rotating the drill they can change direction up, down,and to the side as the drill will move in the direction away from the side with the chisel profile.
Not rocket science but it works

Macca

[ozwinner]

Thanks Macca.


Al ;)

[Iain]

And after the pipe is installed they say 'you wanted gas?, this is the water pipe' :D :D :D
Hear power is coming through your way soon :rolleyes:

[kiwigeo]

Might as well get involved in this thread..have just arrived home from a job in Bass Strait where we drilled a well out to 60 degrees from vertical and steered same to the final target.

In the oil business we carry out our directional drilling by turning the drill bit with a mud powered downhole motor (rather than turning the whole drill string and bit as one). The motor has an adjustable bend in it (1-2 deg usually) and by orientating the motor we can steer the drill bit in the desired direction. Directional control is provided by an MWD (measurement while drilling) tool located behind the motor. The MWD has a magnetometer and gravimeter on board and the readings from same are sent back to surface in real time by way of a pulser on the tool. The pulser sets up a pulse in the drilling mud in the drill string and a pressure sensor at surface converts the mud pulse back into an eletcrical pulse....easy.

[AlexS]

Might as well get involved in this thread..have just arrived home from a job in Bass Strait where we drilled a well out to 60 degrees from vertical and steered same to the final target.

In the oil business we carry out our directional drilling by turning the drill bit with a mud powered downhole motor (rather than turning the whole drill string and bit as one). The motor has an adjustable bend in it (1-2 deg usually) and by orientating the motor we can steer the drill bit in the desired direction. Directional control is provided by an MWD (measurement while drilling) tool located behind the motor. The MWD has a magnetometer and gravimeter on board and the readings from same are sent back to surface in real time by way of a pulser on the tool. The pulser sets up a pulse in the drilling mud in the drill string and a pressure sensor at surface converts the mud pulse back into an eletcrical pulse....easy.

Times have changed!
My uncle was a driller at Rough Range - Australia's 1st oil strike - and remember him telling me how they measured the angle of directional drilling, by etching a line on a container at the bottom of the hole using hydrofluoric acid. Pretty dangerous stuff, and I'm sure, not as accurate or quick as today's methods.

[Daddles]

I still reckon they have a garden gnome sitting on the drill bit :cool:

Richard

[kiwigeo]

Times have changed!
My uncle was a driller at Rough Range - Australia's 1st oil strike - and remember him telling me how they measured the angle of directional drilling, by etching a line on a container at the bottom of the hole using hydrofluoric acid. Pretty dangerous stuff, and I'm sure, not as accurate or quick as today's methods.

Rough Range?? Man thats going way back... very famous well that one. Fascinating seeing how the technology has changed over the years in the oil patch. Even during the relatively short time Ive been working in the patch ive seen amazing changes in the way things are done.

[Fat Pat]

I heard they were actually drilling for Pancakes!

[kiwigeo]

I heard they were actually drilling for Pancakes!

Dont need to drill for pancakes...have got hundreds of them sitting in the galley every morning!! If theres just one American on board you can guarantee therell be pancakes in the galley.