Energy holding firm Xtract Energy said its subsidiary company, Elko Energy, has experienced another setback to its drilling programme off the coast of Denmark.Canada-based oil and gas exploration firm Elko said that drilling at its Luna well has been further delayed until early December, because availability of the drilling rig has been delayed as a result of contractual drilling in Denmark. Drilling at the Luna site is expected to take around one month, during which time Elco hopes to maximise information on the location and ascertain its potential for production. Xtract Energy's share price was down 1.59% to 1.55p at 14:41. NR