Just in my honest opinion.............................
Open an american online share trading account (very easy), or a UK one like Barclays if you prefer.
Learn all you can about oil stocks, particularly
http://quote.yahoo.com/q?s=slb
and WFT, BHI, HAL
for SLB, wait til it drops back to 80-95 range, then put about half your money in. Sell it when it goes up to 140/150, in about 7 months. That's quite a good return for little risk.
I quadrupled my money on SLB once, it is a very nice stock and still underpriced.
All just my opinion, however. Good luck.