Venezuela Boosts Taxes on Orinoco Deals &lt;p&gt;&lt;/p&gt;&lt;p&gt; By Pascal Fletcher&lt;/p&gt;&lt;p&gt; CARACAS, Venezuela (Reuters) - Venezuela on Sunday orderedforeign oil firms operating in its huge Orinoco heavy crudebelt to pay much higher taxes in what President Hugo Chavezcalled a drive to tighten sovereign control over petroleumresources.&lt;/p&gt;