HOUSTON, April 24 (Reuters) -
* Weatherford International on Tuesday said a divestiture of its land drilling rigs was 'taking longer than expected'
* The company said the delay was due to increased interest in a geographic subset of the business, which has made the divestiture process more complex
* Weatherford said it has also initiated two divestitures in addition to the land drilling rigs. Those divestitures are expected to generate $500 million by year end
* Weatherford's chief executive, Mark McCollum, on Tuesday said short-cycle investments would drive oil and gas activity in 2018 (Reporting by Liz Hampton; editing by Jonathan Oatis)