Holding H1.. Applying for L1

I am India…I have H1B visa valid till 2019.We got project for different location and different Client.As premium processing cancelled now, H1 Amendment will take Time.So My company is planning to apply L1.

So if they Apply L1B, My H1b will be cancelled or not? Please suggest me.

How much Time will take for H1 Amendment?

How much Time will take for L1 Premium?

Ans please… I am waiting for the comments