This is from the bi demo script at https://www.microsoftofficedemos.com/
To publish the Power View Report to SharePoint.
- In Excel, on the File tab, click Save As.
- In the Save As window, under Places, click SharePoint, and then click Browse.
- In the Save As dialog, click Browser View Options.
- In Browser View Options, click Sheets in drop down.
- In list of sheets, click the sheet that contains your Power View report, and then click OK.
- In Save As dialog, navigate to the Reports Gallery, if not selected by default.
- Click Save to upload the workbook from Excel to SharePoint report gallery.
EDIT: Unfortunately you can't extract the power view per this info, office.microsoft.com/en-in/excel-help/…. There's a suggestion on Connect that you can vote on to add this feature in future versions