** Shares of European oil and oil related services cos rise2-7 pct as crude soars 6 pct
** Saipem (+7.8 pct), Seadrill (+7.2pct), SBM Offshore (+4 pct) are top risers on Stoxxoil and gas index (+3 pct)
** Total, BP and Shell (+2.5-3.5pct) are the biggest boosts
** Top officials from the world's biggest oil producers meetin Doha, spurring speculation of an eventual deal to tackle adeep supply glut
** Stoxx oil index has risen 2 pct or more for 3 straightdays; set for biggest 3-day gain since Nov 2008 (thyagaraju.adinarayan.thomsonreuters.com@reuters.net)