The three biggest international oilfield services firms remain in , not following nearly all Western oil majors that have said in recent weeks they would quit their n joint ventures and projects and would quit trading n oil. While BP, Shell, and ExxonMobil raced to announce they are withdrawing from all their operations and stakes in companies and joint ventures in following Putin's invasion of e, Schlumberger, Halliburton, and Baker Hughes have not announced such moves, the Financial Times reports. ...