on a helicopter to get the centralizers and the weatherford hand out to the rig.so they're there, the 15 plus the six will give them the 21 that they need. but there's a last minute decision not to use the additional 15 centralizers. john guide, again, a senior engineer on the project, says i just found out that the stop collars aren't part of the centralizers. he's talking, now, about separate stop collars top and bottom. he says now i have a total of 45 pieces, those 15 centralizers and two stop collars each that are going to be external casings, and i'm worried about them. it's going to be ten hours to install them, plus we're adding 45 pieces. the concern here is that having those exterrible centralizers -- external centralizers can either hack up the casing in the wellhead which makes it very difficult to finish the well, or they can come off and not do their jobs. his subordinate, brett, says in thinking about this, who cares, it's done, end of story. we'll probably be fine, and we'll get a good cement job. i would rather have to squeeze than get stuck above

and, finally, the famous centralizers you've heard about were made by weatherford. now, in 50 years of trying cases i've learned what people hear names, they learn track of them, they can't keep track of where they are and that kind of thing. so what we've done is this. we have a chart of the onshore, sometimes you see people called out and down passionate in town. on the onshore chart, the people, transocean and halliburton have who was on the rig that night, bp well site leader's, the transocean team operating the rig, halliburton personnel. to make it easier to keep track, we put around the room these big charged with all these names on it again as far as i'm concerned it's okay if you get confused what's going on to walk up and take a look at this. it's important that everybody understands what's going on. at the breaks you can walk up and look at it and get a feel for it. we won't talk about all these people today, but we have done this so that everybody can follow the names and follow what's going on. of course, as we go through this will also explain who the

on a helicopter to get the centralizers and the weatherford hand out to the rig. so they're there, the 15 plus the six will give them the 21 that they need. but there's a last minute decision not to use the additional 15 centralizers. john guide, again, a senior engineer on the project, says i just found out that the stop collars aren't part of the centralizers. he's talking, now, about separate stop collars top and bottom. he says now i have a total of 45 pieces, those 15 centralizers and two stop collars each that are going to be external casings, and i'm worried about them. it's going to be ten hours to install them, plus we're adding 45 pieces. the concern here is that having those exterrible centralizers -- external centralizers can either hack up the casing in the wellhead which makes it very difficult to finish the well, or they can come off and not do their jobs. his subordinate, brett, says in thinking about this, who cares, it's done, end of story. we'll probably be fine, and we'll get a good cement job. i would rather have to squeeze than get stuck abov

we get the information from the provider of the centralizers that is not halliburton, but weatherford. >> would you agree correcting incorrect centralizer information might change the results of this model? >> i don't believe it fixes the fact the job channeled. >> is halliburton rerunning the model with correct input data? >> we're still working on that. >> are you willing to make the results public when you do that modeling? >> the investigations continuing into this, so i assume it would become public. >> i'll take that as a maybe. >> you know, we can go back and model it with the exact low cations of the -- location of the exact specifications and rerun the model, and i'm sure that's something in my opinion that i think we can do. >> i want to talk a little now about the nitrogen-foam cement in particular. bp's report, as mr. bly mentioned earlier, said the foam cement was in fact unstable. halliburton, mr. vargo, do you have an opinion whether that foam-cement was likely to have been stable? >> results provided just prior to the execution of the job indicates the stability. i kno

>> this particular tool by the manufacturers, this is a weatherford tool. by their data tables provided in the graphical presentation, it would have taken between 5-700 citizen psi to -- 5-700 psi to convert this valve. the equation they provide is a fluid dynamics friction lost through nozzle-type calculation, and i did those numbers with the mud weight in the hole at the time and calculated right at 600 psi. >> now, looking at this float equipment, when you drop the ball, it plugs up this hole at the bottom. but there are these two additional holes at the side through which mud can flow, right? how does one obtain 600 psi of pressure when you have these two holes on the side through which mud can flow? >> well, as i said, you have to pump mud through those holes at least six gallons a minute, if not possibly more to guarantee that you have sheared the pins and, thereby, converted the valve. >> so is the flow rate more important than the pressure that's actually being exerted by the pump? >> the flow rate is the only thing that's important. the pressure at

and, finally, the famous centralizers you've heard about were made by weatherford. now, in 50 years of trying cases i've learned what people hear names, they learn track of them, they can't keep track of where they are and that kind of thing. so what we've done is this. we have a chart of the onshore, sometimes you see people called out and down passionate in town. on the onshore chart, the people, transocean and halliburton have who was on the rig that night, bp well site leader's, the transocean team operating the rig, halliburton personnel. to make it easier to keep track, we put around the room these big charged with all these names on it again as far as i'm concerned it's okay if you get confused what's going on to walk up and take a look at this. it's important that everybody understands what's going on. at the breaks you can walk up and look at it and get a feel for it. we won't talk about all these people today, but we have done this so that everybody can follow the names and follow what's going on. of course, as we go through this will also explain who the