This is a long video showing a variety of half guard sweeps and attacks when you are fairly deep with your half guard. This video gives you a couple of options depending on what your opponent does in your top guard. The technique is show without a gi, but also works well with a gi. The half guard sweeps are taught by Ze Mario Esfiha from his Essential Jiu-Jitsu Series and also the Ultimate Grappling Series found here:
Great video, very helpful. Thanks!