UPDATE 1-First Reserve sells majority interest in Acteon to KKR

(Adds details, valuation)

LONDON, Oct 1 (Reuters) - Private equity group KKR has bought oil and gas services group Acteon from rival First Reserve as it beefs up its investment in energy and infrastructure businesses.

Texas-based private equity firm White Deer Energy will take a minority stake alongside KKR, with the remainder of the company owned by management, the groups said on Monday.

No financial details were disclosed, but a person familiar with the situation said the deal valued the company at 800 million to 900 million pounds ($1.3-1.45 billion).

($1 = 0.6193 British pounds) (Reporting by Simon Meads)

((simon.meads@thomsonreuters.com)(+44 20 7542 9969)(Reuters Messaging: simon.meads.thomsonreuters.com@reuters.net))