OT. WAY OT, Engineering Problem. Need some help |
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OT. WAY OT, Engineering Problem. Need some help |
jfort |
Aug 27 2008, 10:55 AM
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#1
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Senior Member Group: Members Posts: 1,137 Joined: 5-May 03 From: Findlay, OH Member No.: 652 Region Association: Upper MidWest |
My son and I have a real problem and we need some help. My son is a licensed blaster. He has been asked to stimulate oil wells with dynamite. I am trying to help him. In short, we will fabricate a "torpedo." Currently, we are thinking of using a 5' length of 1.5" PVC with the down end made into a point. The torpedo will be filled with 2 sticks of dynamite and filled with as dense a sand/gravel as we can find. It will be dropped down a 5" pipe filled with water. It is estimated that it is 640' to the bottom. Can you help me calculate how long it will take the torpedo to reach the bottom? (We need to make sure it gets to the bottom before the fuse ignites the dynamite!!) I am sure the efficiency through the water, drag, is an important and not known for sure variable, but perhaps there is a range that would get us close enough.
Any guidance or leads would be most appreciated. |
ArtechnikA |
Aug 28 2008, 04:01 PM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
I think I'd put a camera and light source in the nose. CCD cameras are cheap and short-haul modem technology can handle a 1000' run. (I don't think I'd trust 232. 485 maybe...
That way you can *see* if it's safe to detonate. (FWIW - i did some oilfield support engineering once upon a time in my storied career - drillrig simulation control systems and cementing (plug flow, laminar flow, density issues...) studies.) If you don't want the 'unmanned vehicle' approach, i think I'd go with 650' of pipe and (effectively) positively drive it into place. Once it's bottomed, pull up the pipe, and hit it. |
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