[I]By the way, dumgeek, you’re no dumb geek. To the dummys you might seem a freak. (smile) I agree much with your concerns … [/I]
[I]May 15th: Admiral Allen said an [U]X-ray type analysis[/U] of the failed blow out preventer (BOP) indicated that it had worked partially and was limiting flow from the well to some degree. He said officials had been able to measure the pressure, learning that oil was flowing into the device at [U]8,000 to 9,000 pounds per square inch[/U] and flowing out into the Gulf at around 2,650 pounds per square inch.[/I]
A bit of trivia, a fire hydrant has about 50psi and my 12ga magnum has peak pressure of 11,000psi. I can blow golf balls to bits with a duck load or a slug. This well’s like that kind of pressure …
Below, I did an analysis of 2 tubes of hypothetical sizes of 12” diameter and 21” diameter, each 13,000 feet long for consideration, using an average of 8,500psi as shown above:
12” x 13,000’ cylinder volume = 1819 Barrels (Petroleum)
Area of 12” circle area = 113.1 x 8,500psi = 480 tons upward lift
Volume 1,819 Barrels (Petro) = 289.2 Cubic Meters = 289,200 Kilograms = 637,576 lbs = 319 tons fresh water
[U]2 x H2O density mud would weigh 638 tons - 319 tons existing = 319 tons additional downward force versus 480 tons upward lift.[/U]
21” x 13,000’ cylinder volume = 5571 Barrels (Petroleum)
Area of 21” circle area = 346.4 x 8,500psi = 1,472 tons upward lift
Volume 5571 Barrels (Petro) = 885.7 Cubic Meters = 885,700 Kilograms = 1,952,634 lbs = 916 tons fresh water
[U]2 x H2O density mud would weigh 1832 tons - 916 tons existing = 916 tons additional downward force versus 1,472 tons upward lift. [/U]
[I]NOT being in the industry[/I], I made an arbitrary mud weight density of 2 x density of fresh water, which is (1,000kg/m cubed X 2) or 2,000kg/m cubed. It seems to me that BP has used very much more mud than would be required to fill these pipes unless outflow is going where it should not be, and that by a very large margin. I must be confused on how we make this mud work like this. It seems to me the mud should be heavier, ideally say 3-4x fresh water density, before it’s mass (length pumped down the tube) can counterbalance the upward force to stabilize this thing to be still long enough to hold concrete reliably. Aside from flow/viscosity rate reductions if any, dense mud is best because less is needed.
Furthermore considering the incredible pressures and heat which I can only estimate at 250-300F, I’d consider dumping segments of knotted Kevlar rope (line) into the [U]junk shot[/U]. When a company made $45 million a day in 2009 they can afford to buy the best junk there is to shoot. Maybe pieces of Kevlar fabric could work better. It seems better than bits of rubber, golf balls, rope, etc. I’m just fishing for a solution … [ATTACH=CONFIG]874[/ATTACH] [U]KEVLAR[/U] - Double Braid utilizes [U]DuPont[/U] Kevlar aramid fiber for a super high strength core and Polyester fiber for an abrasion resistant cover. It is widely used to replace wire-rope where extremely low stretch and high strengths are critical.
[B]DIA.[/B] 3/4" [B]CIRC.[/B] 2-1/4" [B]AVG TENSILE STRENGTH (lbs.)[/B] 33,000
[B]APRX. WEIGHT (pounds per 100 Ft.)[/B]17.1 …Specific Gravity 1.42 x heavy as H2O … Elongation at Break 1.0% … Critical Temp. 350°F …Abrasion: Excellent
[U][SIZE=2]http://www.pelicanrope.com/new03.htm[/SIZE][/U]