Was the Sepoy Mutiny successful?

The Sepoy Mutiny, although a major uprising, ultimately failed to dislodge the British from India. The British East India company would regain control but it would be later abolished and direct administration would come under the control of the British crown. 

For further reading check the following articles:

• Revolt of 1857, political and Economic Factors
• Revolt of 1857: Immediate Factor
• Revolt of 1857 Social Causes