Schlumberger (schlum-ber-jay) stock has traded down to $93.10 today, down $2.10 from yesterday's close. Buy the January 2017 $80 calls, which are trading at $18.65 bid and $20.45 ask as of right now. The spread is wide, but isn't a problem when you have two years and one month for the stock to get to the breakeven point of $100.45. And with their major competitor, Halliburton, being pre-occupied with their planned merger with Baker Hughes and all the upcoming battles with the regulators over the next 12-18 months, Schlumberger should be able to benefit substantially. If oil keeps going down, this prediction might not be great, but if we are near the bottom, buying the long-term call at $20 could lead to a 150% gain in 25 months.