The Prime Minister said the major development off the coast of Aberdeen will "boost our energy security, back British workers... and bring down bills".
Jackdaw is one of two major North Sea projects which backers claim will provide greater energy security for the UK as well as boosting Scotland's economy.
EXCLUSIVE: Shirley-Anne Somerville hit out after the Record first reported on the worrying trend of poor Scots agreeing to hand over a percentage of their pay-outs to third parties.
The First Minister announced "by the end of this Parliament, through franchising and regulation, the SNP will bring the bus network back into public control".
A Prime Minister with a positive message for Scotland clashes with the SNP's endless claims that Westminster must be viewed as the enemy, says Chris McCall
Speaking on a visit to a college built on the site of the former Ravenscraig steel works, the Prime Minister said devolution was "never meant to end at the doors of Holyood".
The Prime Minister will use a speech in Lanarkshire to emphasise the Scottish Government is one of the most centralised devolved administrations in Europe.
In a rare example of dissent, SNP activists gathered away from the party conference to discuss how to kick-start the stalled campaign for ending the Union.