How many times can you extend a Tier 2?

[asn234]

I currently have a Tier 2 that is valid for 3 years. After completing of the 3 years, my workplace said they can guarantee a contract extension of 6 months, so I will have to apply to extend my Tier 2 to cover the next 6 months. In the event they can extend my contract a second time, am I able to do the same thing and just re-apply to extend the Tier 2? I know you can spend a max time of 6 years on Tier 2 but doesn't specify how many times you can apply to extend the visa.

Thanks

[manci]

no limit to the number of extensions as long as they are within the permitted length of stay