Forum Replies Created
-
AuthorPosts
-
June 6, 2010 at 11:23 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #561264June 6, 2010 at 11:23 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #561369
ucodegen
Participant[quote KSMountain]
A 20″ ANSI B16.5 600 class flange uses 1.625″ bolts torqued to 2,044 ft-lb and is rated for about 740 psi working pressure under normal conditions. It weighs 590 pounds.
[/quote]First problem. I’m seeing indication that the pipe (inner) diameter is 9.5 inches. Since strings are run inside of each other, I don’t know for certain what the top string diameter is.
When I pulled up tables on Class 600 flanges, I saw sizes running 2″ to 4″ with 8 bolt, and 6″ to 8″ at 12 bolts. Going to the video, it almost looks like at most a 8 or 10 bolt flange. Sizes above 12″ are showing more than 20 bolts.
Class 1500 shows 8 bolts in diameters of 2″ to 4″ inch, 12 bolts in diameters of 6″ to 10″, 16 bolts in diameters of 12″. I don’t think we are dealing with diameters of 20″. There aren’t a sufficient number of bolts on the top of the blowout preventor where they made the cut.
http://www.nationalgasket.com/index.php?page=cathodic_bolt-torque
[quote KSMountain]
My broader point was just that it was not a slam dunk to get those bolts off; seems like you agree.
[/quote]
I don’t agree. I think it is easier than they were making it. It is very easy to get an impact wrench that will do 500ft/lbs to 1000ft/lbs of torque.Harbor freight for a cheap 500ft/lb impact wrench
http://www.harborfreight.com/air-tools/impact-wrenches/heavy-duty-3-4-quarter-inch-standard-anvil-impact-wrench-32871.htmlConsidering that they had to bolt the pipes together underwater, they have the tools to generate the needed torque at those depths. It took them forever to cut the top of the broken riser. This is why I feel that they don’t have the ‘A’ team working on it (laid them off so they could make more profit?) In normal run-away wells, you try to clear the damage quickly and then get a clean mount. BP was doing everything but this – including taking time for fingerpointing.
June 6, 2010 at 11:23 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #561652ucodegen
Participant[quote KSMountain]
A 20″ ANSI B16.5 600 class flange uses 1.625″ bolts torqued to 2,044 ft-lb and is rated for about 740 psi working pressure under normal conditions. It weighs 590 pounds.
[/quote]First problem. I’m seeing indication that the pipe (inner) diameter is 9.5 inches. Since strings are run inside of each other, I don’t know for certain what the top string diameter is.
When I pulled up tables on Class 600 flanges, I saw sizes running 2″ to 4″ with 8 bolt, and 6″ to 8″ at 12 bolts. Going to the video, it almost looks like at most a 8 or 10 bolt flange. Sizes above 12″ are showing more than 20 bolts.
Class 1500 shows 8 bolts in diameters of 2″ to 4″ inch, 12 bolts in diameters of 6″ to 10″, 16 bolts in diameters of 12″. I don’t think we are dealing with diameters of 20″. There aren’t a sufficient number of bolts on the top of the blowout preventor where they made the cut.
http://www.nationalgasket.com/index.php?page=cathodic_bolt-torque
[quote KSMountain]
My broader point was just that it was not a slam dunk to get those bolts off; seems like you agree.
[/quote]
I don’t agree. I think it is easier than they were making it. It is very easy to get an impact wrench that will do 500ft/lbs to 1000ft/lbs of torque.Harbor freight for a cheap 500ft/lb impact wrench
http://www.harborfreight.com/air-tools/impact-wrenches/heavy-duty-3-4-quarter-inch-standard-anvil-impact-wrench-32871.htmlConsidering that they had to bolt the pipes together underwater, they have the tools to generate the needed torque at those depths. It took them forever to cut the top of the broken riser. This is why I feel that they don’t have the ‘A’ team working on it (laid them off so they could make more profit?) In normal run-away wells, you try to clear the damage quickly and then get a clean mount. BP was doing everything but this – including taking time for fingerpointing.
June 4, 2010 at 6:09 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #560077ucodegen
Participant[quote KSMountain]
Folks there who claim to be knowledgable say the bolts were tightened to about 13000 ft-lbs on land, and that now underwater, if the lubrication has degraded (which it likely has), you typically need triple the torque to get ’em off.
[/quote]
They are not torqued to 13,000ft-lbs. This could be the face pressure on the joint(in lb/sqin), not the torque of the bolts. You are off by two decimal positions. Try 130ft-lbs to 360ft-lbs. 130ft/lbs is about the same torque used on the head bolts of high performance engines with moderate ‘boost’ (superchargers/turbo chargers). If you are using a bolt with a diameter of 1 inch, and torque it to 130 ft-lbs, your clamping force is about 7,800 lbs (for only 1 bolt). Multiply this by the number of bolts.
http://www.engineersedge.com/calculators/torque_calc.htm
For face pressure, divide by surface area of the flange. Note that the above calc uses inch-lbs, to get ft-lbs to inch-lbs, multiply by 12.A torque of 13,000lb-ft would break the bolts.
There are two real problems:
1) Removing the bolts and putting the new ones in (torquing). The problem with getting them off is that you don’t have anything to ‘push against’ when torquing the bolts. That said, an impact wrench works wonders under those conditions.
2) Putting a new valve on top with all of that flow going out of the end. That said, there is a trick to doing that. The trick can be seen in the John Wayne movie “Hellfighters”, not coincidentally a movie about people who bring out of control oil wells into control.It does make me wonder why BP has not tried this method. If the flow is high enough to cause problems when trying to rotate the upper value assembly into position, there is a trick for that involving cutting part of the flange out to reduce pressure and using a second clamp-on flange above that one.
[quote KSMountain]
One person made the point though that one should not underestimate the flow. The flow is like 12000 PSI! Crazy. So you saw off a bolt or two, then you got these totally crazy oil jets hitting the robot, it’s gonna be kinda hard to get the other bolts out.
[/quote]Try 2000 to 5000 psi in static pressure. Considering that the end above the bolts is ‘open’, you don’t have that kind of static pressure. A closed valve would have to withstand this type of pressure, but an open end pipe has almost no pressure on it. 5000psi on an 8inch internal diameter pipe translates into about 251327lbs of force trying to lift the valve off of the flange. What will happen though is that once the cut end gets loose, it will head off in an unknown direction due to the flow rate.
The fact that the pipe had a crimp in it that didn’t straighten when the far end was cut indicates to me that they are no-where near 5000psi. That type of pressure and the resulting flow would have instantly straightened the pipe up. It would have also likely torn the crimped and partially torn part off because the crimp and tear weakened the pipe at that point.
June 4, 2010 at 6:09 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #560178ucodegen
Participant[quote KSMountain]
Folks there who claim to be knowledgable say the bolts were tightened to about 13000 ft-lbs on land, and that now underwater, if the lubrication has degraded (which it likely has), you typically need triple the torque to get ’em off.
[/quote]
They are not torqued to 13,000ft-lbs. This could be the face pressure on the joint(in lb/sqin), not the torque of the bolts. You are off by two decimal positions. Try 130ft-lbs to 360ft-lbs. 130ft/lbs is about the same torque used on the head bolts of high performance engines with moderate ‘boost’ (superchargers/turbo chargers). If you are using a bolt with a diameter of 1 inch, and torque it to 130 ft-lbs, your clamping force is about 7,800 lbs (for only 1 bolt). Multiply this by the number of bolts.
http://www.engineersedge.com/calculators/torque_calc.htm
For face pressure, divide by surface area of the flange. Note that the above calc uses inch-lbs, to get ft-lbs to inch-lbs, multiply by 12.A torque of 13,000lb-ft would break the bolts.
There are two real problems:
1) Removing the bolts and putting the new ones in (torquing). The problem with getting them off is that you don’t have anything to ‘push against’ when torquing the bolts. That said, an impact wrench works wonders under those conditions.
2) Putting a new valve on top with all of that flow going out of the end. That said, there is a trick to doing that. The trick can be seen in the John Wayne movie “Hellfighters”, not coincidentally a movie about people who bring out of control oil wells into control.It does make me wonder why BP has not tried this method. If the flow is high enough to cause problems when trying to rotate the upper value assembly into position, there is a trick for that involving cutting part of the flange out to reduce pressure and using a second clamp-on flange above that one.
[quote KSMountain]
One person made the point though that one should not underestimate the flow. The flow is like 12000 PSI! Crazy. So you saw off a bolt or two, then you got these totally crazy oil jets hitting the robot, it’s gonna be kinda hard to get the other bolts out.
[/quote]Try 2000 to 5000 psi in static pressure. Considering that the end above the bolts is ‘open’, you don’t have that kind of static pressure. A closed valve would have to withstand this type of pressure, but an open end pipe has almost no pressure on it. 5000psi on an 8inch internal diameter pipe translates into about 251327lbs of force trying to lift the valve off of the flange. What will happen though is that once the cut end gets loose, it will head off in an unknown direction due to the flow rate.
The fact that the pipe had a crimp in it that didn’t straighten when the far end was cut indicates to me that they are no-where near 5000psi. That type of pressure and the resulting flow would have instantly straightened the pipe up. It would have also likely torn the crimped and partially torn part off because the crimp and tear weakened the pipe at that point.
June 4, 2010 at 6:09 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #560672ucodegen
Participant[quote KSMountain]
Folks there who claim to be knowledgable say the bolts were tightened to about 13000 ft-lbs on land, and that now underwater, if the lubrication has degraded (which it likely has), you typically need triple the torque to get ’em off.
[/quote]
They are not torqued to 13,000ft-lbs. This could be the face pressure on the joint(in lb/sqin), not the torque of the bolts. You are off by two decimal positions. Try 130ft-lbs to 360ft-lbs. 130ft/lbs is about the same torque used on the head bolts of high performance engines with moderate ‘boost’ (superchargers/turbo chargers). If you are using a bolt with a diameter of 1 inch, and torque it to 130 ft-lbs, your clamping force is about 7,800 lbs (for only 1 bolt). Multiply this by the number of bolts.
http://www.engineersedge.com/calculators/torque_calc.htm
For face pressure, divide by surface area of the flange. Note that the above calc uses inch-lbs, to get ft-lbs to inch-lbs, multiply by 12.A torque of 13,000lb-ft would break the bolts.
There are two real problems:
1) Removing the bolts and putting the new ones in (torquing). The problem with getting them off is that you don’t have anything to ‘push against’ when torquing the bolts. That said, an impact wrench works wonders under those conditions.
2) Putting a new valve on top with all of that flow going out of the end. That said, there is a trick to doing that. The trick can be seen in the John Wayne movie “Hellfighters”, not coincidentally a movie about people who bring out of control oil wells into control.It does make me wonder why BP has not tried this method. If the flow is high enough to cause problems when trying to rotate the upper value assembly into position, there is a trick for that involving cutting part of the flange out to reduce pressure and using a second clamp-on flange above that one.
[quote KSMountain]
One person made the point though that one should not underestimate the flow. The flow is like 12000 PSI! Crazy. So you saw off a bolt or two, then you got these totally crazy oil jets hitting the robot, it’s gonna be kinda hard to get the other bolts out.
[/quote]Try 2000 to 5000 psi in static pressure. Considering that the end above the bolts is ‘open’, you don’t have that kind of static pressure. A closed valve would have to withstand this type of pressure, but an open end pipe has almost no pressure on it. 5000psi on an 8inch internal diameter pipe translates into about 251327lbs of force trying to lift the valve off of the flange. What will happen though is that once the cut end gets loose, it will head off in an unknown direction due to the flow rate.
The fact that the pipe had a crimp in it that didn’t straighten when the far end was cut indicates to me that they are no-where near 5000psi. That type of pressure and the resulting flow would have instantly straightened the pipe up. It would have also likely torn the crimped and partially torn part off because the crimp and tear weakened the pipe at that point.
June 4, 2010 at 6:09 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #560777ucodegen
Participant[quote KSMountain]
Folks there who claim to be knowledgable say the bolts were tightened to about 13000 ft-lbs on land, and that now underwater, if the lubrication has degraded (which it likely has), you typically need triple the torque to get ’em off.
[/quote]
They are not torqued to 13,000ft-lbs. This could be the face pressure on the joint(in lb/sqin), not the torque of the bolts. You are off by two decimal positions. Try 130ft-lbs to 360ft-lbs. 130ft/lbs is about the same torque used on the head bolts of high performance engines with moderate ‘boost’ (superchargers/turbo chargers). If you are using a bolt with a diameter of 1 inch, and torque it to 130 ft-lbs, your clamping force is about 7,800 lbs (for only 1 bolt). Multiply this by the number of bolts.
http://www.engineersedge.com/calculators/torque_calc.htm
For face pressure, divide by surface area of the flange. Note that the above calc uses inch-lbs, to get ft-lbs to inch-lbs, multiply by 12.A torque of 13,000lb-ft would break the bolts.
There are two real problems:
1) Removing the bolts and putting the new ones in (torquing). The problem with getting them off is that you don’t have anything to ‘push against’ when torquing the bolts. That said, an impact wrench works wonders under those conditions.
2) Putting a new valve on top with all of that flow going out of the end. That said, there is a trick to doing that. The trick can be seen in the John Wayne movie “Hellfighters”, not coincidentally a movie about people who bring out of control oil wells into control.It does make me wonder why BP has not tried this method. If the flow is high enough to cause problems when trying to rotate the upper value assembly into position, there is a trick for that involving cutting part of the flange out to reduce pressure and using a second clamp-on flange above that one.
[quote KSMountain]
One person made the point though that one should not underestimate the flow. The flow is like 12000 PSI! Crazy. So you saw off a bolt or two, then you got these totally crazy oil jets hitting the robot, it’s gonna be kinda hard to get the other bolts out.
[/quote]Try 2000 to 5000 psi in static pressure. Considering that the end above the bolts is ‘open’, you don’t have that kind of static pressure. A closed valve would have to withstand this type of pressure, but an open end pipe has almost no pressure on it. 5000psi on an 8inch internal diameter pipe translates into about 251327lbs of force trying to lift the valve off of the flange. What will happen though is that once the cut end gets loose, it will head off in an unknown direction due to the flow rate.
The fact that the pipe had a crimp in it that didn’t straighten when the far end was cut indicates to me that they are no-where near 5000psi. That type of pressure and the resulting flow would have instantly straightened the pipe up. It would have also likely torn the crimped and partially torn part off because the crimp and tear weakened the pipe at that point.
June 4, 2010 at 6:09 PM in reply to: OT: Anyone watching the live feed of BP cutting the stack? #561059ucodegen
Participant[quote KSMountain]
Folks there who claim to be knowledgable say the bolts were tightened to about 13000 ft-lbs on land, and that now underwater, if the lubrication has degraded (which it likely has), you typically need triple the torque to get ’em off.
[/quote]
They are not torqued to 13,000ft-lbs. This could be the face pressure on the joint(in lb/sqin), not the torque of the bolts. You are off by two decimal positions. Try 130ft-lbs to 360ft-lbs. 130ft/lbs is about the same torque used on the head bolts of high performance engines with moderate ‘boost’ (superchargers/turbo chargers). If you are using a bolt with a diameter of 1 inch, and torque it to 130 ft-lbs, your clamping force is about 7,800 lbs (for only 1 bolt). Multiply this by the number of bolts.
http://www.engineersedge.com/calculators/torque_calc.htm
For face pressure, divide by surface area of the flange. Note that the above calc uses inch-lbs, to get ft-lbs to inch-lbs, multiply by 12.A torque of 13,000lb-ft would break the bolts.
There are two real problems:
1) Removing the bolts and putting the new ones in (torquing). The problem with getting them off is that you don’t have anything to ‘push against’ when torquing the bolts. That said, an impact wrench works wonders under those conditions.
2) Putting a new valve on top with all of that flow going out of the end. That said, there is a trick to doing that. The trick can be seen in the John Wayne movie “Hellfighters”, not coincidentally a movie about people who bring out of control oil wells into control.It does make me wonder why BP has not tried this method. If the flow is high enough to cause problems when trying to rotate the upper value assembly into position, there is a trick for that involving cutting part of the flange out to reduce pressure and using a second clamp-on flange above that one.
[quote KSMountain]
One person made the point though that one should not underestimate the flow. The flow is like 12000 PSI! Crazy. So you saw off a bolt or two, then you got these totally crazy oil jets hitting the robot, it’s gonna be kinda hard to get the other bolts out.
[/quote]Try 2000 to 5000 psi in static pressure. Considering that the end above the bolts is ‘open’, you don’t have that kind of static pressure. A closed valve would have to withstand this type of pressure, but an open end pipe has almost no pressure on it. 5000psi on an 8inch internal diameter pipe translates into about 251327lbs of force trying to lift the valve off of the flange. What will happen though is that once the cut end gets loose, it will head off in an unknown direction due to the flow rate.
The fact that the pipe had a crimp in it that didn’t straighten when the far end was cut indicates to me that they are no-where near 5000psi. That type of pressure and the resulting flow would have instantly straightened the pipe up. It would have also likely torn the crimped and partially torn part off because the crimp and tear weakened the pipe at that point.
June 3, 2010 at 3:00 PM in reply to: Waay ot: anyone need a hard drive? 1 TB seagate for 39.99 #559245ucodegen
ParticipantSeagate has had some problems in the firmware for their 500GB, 750GB, 1TB and 1.5TB drives in the past (won’t spin up, goes to sleep and ‘can’t get up’.. ). Supposedly, they fixed the bugs. Seagate used to have very good quality hard drives. After they were ‘taken private’, their quality suffered.
Ref to problems with the 7200.11 version of the drive.
http://www.computerworld.com/s/article/9126280/Complaints_flood_Seagate_over_hard_drive_problems
http://hardware.slashdot.org/article.pl?sid=09/01/17/0115207
http://www.channelregister.co.uk/2009/01/16/barracuda_failure_plague/
http://forums.seagate.com/t5/Desktop-ATA-and-Serial-ATA/Official-st31000340as-1TB-barracuda-epic-fail-thread/m-p/14525?view=by_date_ascendingComp-USA is not the only one with this price.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4691122&CatId=2459What is interesting is that the CompUSA page and Tigerdirect page mimic each other, down to the comments.
June 3, 2010 at 3:00 PM in reply to: Waay ot: anyone need a hard drive? 1 TB seagate for 39.99 #559348ucodegen
ParticipantSeagate has had some problems in the firmware for their 500GB, 750GB, 1TB and 1.5TB drives in the past (won’t spin up, goes to sleep and ‘can’t get up’.. ). Supposedly, they fixed the bugs. Seagate used to have very good quality hard drives. After they were ‘taken private’, their quality suffered.
Ref to problems with the 7200.11 version of the drive.
http://www.computerworld.com/s/article/9126280/Complaints_flood_Seagate_over_hard_drive_problems
http://hardware.slashdot.org/article.pl?sid=09/01/17/0115207
http://www.channelregister.co.uk/2009/01/16/barracuda_failure_plague/
http://forums.seagate.com/t5/Desktop-ATA-and-Serial-ATA/Official-st31000340as-1TB-barracuda-epic-fail-thread/m-p/14525?view=by_date_ascendingComp-USA is not the only one with this price.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4691122&CatId=2459What is interesting is that the CompUSA page and Tigerdirect page mimic each other, down to the comments.
June 3, 2010 at 3:00 PM in reply to: Waay ot: anyone need a hard drive? 1 TB seagate for 39.99 #559845ucodegen
ParticipantSeagate has had some problems in the firmware for their 500GB, 750GB, 1TB and 1.5TB drives in the past (won’t spin up, goes to sleep and ‘can’t get up’.. ). Supposedly, they fixed the bugs. Seagate used to have very good quality hard drives. After they were ‘taken private’, their quality suffered.
Ref to problems with the 7200.11 version of the drive.
http://www.computerworld.com/s/article/9126280/Complaints_flood_Seagate_over_hard_drive_problems
http://hardware.slashdot.org/article.pl?sid=09/01/17/0115207
http://www.channelregister.co.uk/2009/01/16/barracuda_failure_plague/
http://forums.seagate.com/t5/Desktop-ATA-and-Serial-ATA/Official-st31000340as-1TB-barracuda-epic-fail-thread/m-p/14525?view=by_date_ascendingComp-USA is not the only one with this price.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4691122&CatId=2459What is interesting is that the CompUSA page and Tigerdirect page mimic each other, down to the comments.
June 3, 2010 at 3:00 PM in reply to: Waay ot: anyone need a hard drive? 1 TB seagate for 39.99 #559948ucodegen
ParticipantSeagate has had some problems in the firmware for their 500GB, 750GB, 1TB and 1.5TB drives in the past (won’t spin up, goes to sleep and ‘can’t get up’.. ). Supposedly, they fixed the bugs. Seagate used to have very good quality hard drives. After they were ‘taken private’, their quality suffered.
Ref to problems with the 7200.11 version of the drive.
http://www.computerworld.com/s/article/9126280/Complaints_flood_Seagate_over_hard_drive_problems
http://hardware.slashdot.org/article.pl?sid=09/01/17/0115207
http://www.channelregister.co.uk/2009/01/16/barracuda_failure_plague/
http://forums.seagate.com/t5/Desktop-ATA-and-Serial-ATA/Official-st31000340as-1TB-barracuda-epic-fail-thread/m-p/14525?view=by_date_ascendingComp-USA is not the only one with this price.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4691122&CatId=2459What is interesting is that the CompUSA page and Tigerdirect page mimic each other, down to the comments.
June 3, 2010 at 3:00 PM in reply to: Waay ot: anyone need a hard drive? 1 TB seagate for 39.99 #560230ucodegen
ParticipantSeagate has had some problems in the firmware for their 500GB, 750GB, 1TB and 1.5TB drives in the past (won’t spin up, goes to sleep and ‘can’t get up’.. ). Supposedly, they fixed the bugs. Seagate used to have very good quality hard drives. After they were ‘taken private’, their quality suffered.
Ref to problems with the 7200.11 version of the drive.
http://www.computerworld.com/s/article/9126280/Complaints_flood_Seagate_over_hard_drive_problems
http://hardware.slashdot.org/article.pl?sid=09/01/17/0115207
http://www.channelregister.co.uk/2009/01/16/barracuda_failure_plague/
http://forums.seagate.com/t5/Desktop-ATA-and-Serial-ATA/Official-st31000340as-1TB-barracuda-epic-fail-thread/m-p/14525?view=by_date_ascendingComp-USA is not the only one with this price.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4691122&CatId=2459What is interesting is that the CompUSA page and Tigerdirect page mimic each other, down to the comments.
ucodegen
Participant[quote CONCHO]Puh-leeze. The point is that these type of low-level scammers don’t do the same amount of damage as the ones at the top. AND THE PERSON IN THE STORY HAS BEEN CAUGHT AND WILL GO TO JAIL. Meanwhile the bankster boys are sailing to the Mediterranean on their megayachts, banging supermodels and snorting cocaine WITH YOUR 401K MONEY. Entiende?[/quote]
Again.. who are these ‘banksters’ that you are talking about? Name the names! It is easy to create a ‘straw man’ to then attack to justify your position. Its called a straw man argument. Lets see if you can make the straw man real.. so Puh-leeze right back to you!!
ucodegen
Participant[quote CONCHO]Puh-leeze. The point is that these type of low-level scammers don’t do the same amount of damage as the ones at the top. AND THE PERSON IN THE STORY HAS BEEN CAUGHT AND WILL GO TO JAIL. Meanwhile the bankster boys are sailing to the Mediterranean on their megayachts, banging supermodels and snorting cocaine WITH YOUR 401K MONEY. Entiende?[/quote]
Again.. who are these ‘banksters’ that you are talking about? Name the names! It is easy to create a ‘straw man’ to then attack to justify your position. Its called a straw man argument. Lets see if you can make the straw man real.. so Puh-leeze right back to you!!
-
AuthorPosts
