Halliburton buys oilfield rival Baker Hughes for $34B
cbc.ca
cbc.ca
A diverse set of contractors means you're all double-checking each other's work. I've also seen jobs where most of the services are provided turn-key from one main contractor (and we'd been brought in reluctantly due to availability problems). When everything from the rig, to the drilling fluids, bits, sat comms, wireline services, DST/production and so on are all provided by the one umbrella company there's a lot more copy-pasta going on and opportunity for errors to propagate [and never get noticed]...
It's a shame, Baker Hughes seems like it had a pretty phenomenal history.
There are startups discussed here daily that run up against the regulatory wall, some make out okay, others no so well
"The merger is widely expected to raise anti-trust concerns" http://www.reuters.com/article/2014/11/17/us-bakerhughes-off...
You see the same thing when large American companies merge, they often have to get approval from the EU and increasingly Asian anti-trust authorities.