In a late-night court filing, BP PLC lawyers cited Halliburton’s alleged destruction of cement samples as grounds for U.S. District Judge Carl Barbier to rule that the contractor’s cement design on the drilling project was unstable before the April 2010 blowout of BP’s Macondo well...BP says its inability to test the missing samples has harmed its ability to defend itself at the trial…Last week, Halliburton lawyer Donald Godwin said the company believes the newly discovered material has no bearing on the case…“Halliburton also admitted that the ‘Kodiak well cement’ had in fact been brought onshore from the Deepwater Horizon when the rig was at the Macondo well,” BP lawyers wrote. [P]laintiffs’ attorney…said the Kodiak cement contained an additive, a defoamer that “destabilizes and is incompatible with foam cement.”…