Schlumberger ( SLB) increased its dividend by 40% and said its chief financial officer plans to retire. The oilfield services company said it plans to pay a quarterly dividend of 17.5 cents April 6 to shareholders of record Feb. 21. The company's last dividend was 12.5 cents. Separately, Schlumberger said Jean-Marc Perraud will retire as CFO effective March 1. Perraud, who joined the company in 1974, will remain as a financial adviser to the chairman. Schlumberger named Simon Ayat, currently the company's treasurer, as Perraud's replacement.