Add sliced sausage to soup pot over medium heat and cook until browned.
Remove sausage from the pot, leaving behind rendered fat, and add onion, peppers, and celery (add cooking oil if more fat is needed). Saute until vegetables are tender and beginning to brown. Add minced garlic and cook an addition 2 minutes, or until fragrant.
Add sausage back to the pot, along with diced tomatoes, tomato paste, chicken stock, Worcestershire, hot sauce, bay leaf, flour, and creole seasonings. Stir everything to combine and bring to a simmer over medium-low heat.
Add rice and cook 18 minutes, or until tender. Add raw shrimp in the final five minutes of cooking. Taste for salt, adjusting as needed, and serve immediately.