Heat oil in a big sauce pan or a dutch oven over medium heat; add onion.
Reduce heat to low, and cook the onion 10 minutes or until tender, stirring occasionally.
Add bell pepper and cook 5 minutes.
Add chipotle peppers and garlic, cook one minute.
Add beef and next 5 ingredients. Stir in beer and simmer about 2 minutes. S
tir in Worcestershire sauce and next 4 ingredients. Bring to a low boil and reduce heat to medium to medium low.
Simmer, uncovered, 30-40 minutes.
Add beans, stir, and continue to simmer until liquid has reduced slightly and the chili has become thicker. (After adding beans, I usually simmer another 30-45 minutes).
You will have seconds, possibly thirds.