BRIEF-Pamplona Capital buys 8.8 pct of Nabors - filing

Wed Jan 23, 2013 3:01pm EST

Jan 23 (Reuters) - Nabors Industries Ltd : * Pamplona capital management purchases 8.8 percent in Nabors Industries Ltd

filing * Pamplona says has become increasingly concerned about Nabors underperformance

- filing * Pamplona says intends to have further discussions with management,

shareholders, other parties related to Nabors strategy- filing * Pamplona says has had constructive discussions with Nabors management -