The assistant drillers practiced mud pump changing, remote and locate control together with the repair of the mud pump etc.

副司钻练习倒换泥浆泵、远控近控和修理泥浆泵等。

youdao

This is what this data is supposed to monitor, but the well flow evidence would appear to have been ignored, because at this point the BP rig supervisors should have gone to a well kill operation and started to pump heavy mud back into the well bore to restore the primary control mechanism.

WSJ: The Oil Disaster Is About Human, Not System, Failure