* Q3 Adj EPS of $0.34 beats $0.22

* Q3 revenue of $254 million tops est of $225.9 mln

* Sees lower activity in offshore segment in Q4

* Shares jump as much as 19 pct (Recasts; Adds conference call comments, share movement)

By Antonita Madonna Devotta

BANGALORE, Nov 9 (Reuters) - Tetra Technologies Inc (TTI.N: Quote, Profile, Research) posted strong third-quarter results on increased repair work from damages caused by Hurricane Ike, and said it was beginning to see signs of deepwater activity increasing in the Gulf of Mexico, sending its shares to a new year-high.

The oil and gas services company also expects to benefit as markets appear to have bottomed in its fluids segment, which manufactures and markets clear brine fluids to the oil and gas industry for use in well drilling and workover operations.

Tetra said it will continue supplying fluids to Brazil under its Petrobras contract, begun during the third quarter, and expects the main benefit of the contract to begin in early 2010.

"We are seeing evidence of growth in our long-term deepwater Gulf of Mexico strategy in the beginning of our contract with Petrobras," Chief Executive Stuart Brightman said on a conference call with analysts.