Halliburton Energy Services Inc. destroyed test results that showed samples of the cement used to seal London-based BP’s Macondo well, which exploded off the Louisiana coast last year, were unstable, BP said in a filing today in federal court in New Orleans.
The oilfield services provider also suppressed computer models  that might prove Halliburton was at fault “because it wanted to  eliminate any risk that this evidence would be used against it at  trial,” BP said in the filing.
BP asked the court to find that  Halliburton destroyed evidence on purpose and to compel the company to  turn over for third-party examination the computer used for the  modeling.
“Halliburton is reviewing the details of the motion  filed today,’’ Beverly Stafford, a Halliburton spokeswoman, said in an  e-mail. “However, we believe that the conclusion that BP is asking the  court to draw is without merit, and we look forward to contesting their  motion in court.’’
 Eleven Dead 
BP and Halliburton are suing each other over which company’s  actions and decisions caused the blowout, which killed 11 workers and  sparked the worst offshore oil spill in U.S. history. The two companies  face more than 350 lawsuits by coastal property owners and businesses  claiming billions in damages from the spill.
Halliburton has  raised two primary defenses against allegations it shares blame for the  blowout, BP said in the filing. First, the contractor maintains its  foaming cement formula was stable and performed as designed, BP said.  Second, Halliburton claims BP chose to use too few “centralizers” to  keep the pipe aligned in the well, which allowed hydrocarbons to escape  through channels that formed in the cement liner, BP said.
BP said Halliburton witnesses and documents uncovered in pretrial proceedings undercut both defenses.
Rickey  Morgan, a Halliburton employee who conducted post- incident testing on  Macondo cement slurry samples at the company’s lab in Duncan, Oklahoma,  “testified under oath that he destroyed test results in order to keep  the information from being ‘misinterpreted’ in ways adverse to  Halliburton in litigation,’’ BP said in today’s filing.
 ‘Thin’ Slurry 
According to BP, Morgan testified that during tests the slurry  mixture separated, instead of foaming as designed, and looked “thin’’ to  him, an indicator of potential instability. Morgan said he didn’t take  notes of the tests and dumped out his samples partly because he feared  the results could be harmful to the company in court, BP said.
When  a second Halliburton lab replicated Morgan’s tests with similar  results, lab employees also “destroyed records of the testing as well as  the physical cement samples used in the testing,’’ BP said.
Halliburton’s  in-house labs used up all samples of the slurries and chemical  additives actually used in the well, which prevented third-party labs  from conducting precise tests, BP said.
Even though it couldn’t  provide any actual samples, the contractor has maintained that  post-incident tests conducted by outside labs are unreliable because  they use simulated cement slurries and additives, BP said.
 ‘At Best, Lost’ 
BP also said Halliburton “has, at best, lost’’ computer data that  undermine a claim that fatal channels formed in the cement because BP  didn’t use enough centralizers.
Tommy Roth, vice president in  charge of Halliburton’s cement operations, said in an e-mail three  months after the blowout that a company computer model “demonstrates  that there was no channeling in the Macondo well,’’ according to BP’s  filing.
BP said that it didn’t get a copy of Roth’s message until  July of this year and that it never received copies of the computer  models Roth referenced. Instead, Halliburton told BP the computer  modeling results at issue are “gone,’’ said BP.
BP asked U.S.  District Judge Carl Barbier, who presides over the consolidated  oil-spill litigation in New Orleans, to order Halliburton to give the  computer used in the modeling to a third-party forensic data recovery  firm, to see if the missing evidence can be recovered.
BP also  asked Barbier to consider levying sanctions against Halliburton, such as  barring the company from using certain evidence or defenses at trial or  even dismissing its claims against BP.
