>>> " Looking more like HAL (cement) may be primary liable." <<<
Haliburton will make recommendations for the cement job but the company engineers make final decisions. Haliburton will make their own calculations to make sure that they match the company engineers calculations. Then Haliburton is responsbile for mixing and pumping the cement. Haliburton will provide them with the logs for how much cement they pumped, at what pressure and what cement weight. If Haliburton did what they were told, then they won't be primarily responsible. Also, cement may fail for many reasons that are unrelated to anything done by whomever is cementing.