WWE.com has posted the following update on HHH:
Dr. James Andrews reports that the surgery went well with no complications.
The operation confirmed that the quadriceps tendon was completely torn off the bone and kneecap in his right leg, but was otherwise in good condition. The tendon was reattached to the patella.
According to Dr. Andrews, Triple H will need four to six months of recovery before returning to in-ring action. He will begin rehabilitation immediately in Alabama for the next three weeks before he returns home to continue with his physical therapy. The current prognosis is that The Game should be walking again in six weeks.
You can read the full story here and see more photos (including shots of the actual surgery) here.