Your error seem to be  "Error Code: 1052. Column 'price_type' in where clause is ambiguous"

Try

     $_product = Mage::getModel('catalog/product')->load(1);
     $collection = Mage::getModel('catalog/product_option')
                   ->getProductOptionCollection($_product)
                   ->addFieldToFilter('default_option_price.price_type', array('eq' => 'percent'));


Try debugging using

    echo $collection->getSelect();