glucanases, ácidos nucleicos codificando as mesmas e métodos para fabricar e usar as mesmas

A drilling or oil and gas well clean up and/or fracturing method comprises providing at least one polymer-degrading enzyme comprising a polypeptide of SEQ ID NO:15, which is added to a drilling fluid used during an oil and gas well drilling operation, or to a fluid used for an oil and gas well clean up and/or fracturing operation. Combined with a second enzyme comprising a polypeptide of SEQ ID NO: 2, the enzyme comprising a polypeptide of SEQ ID NO 15 can be used to degrade a xanthan, a guar, a hydroxyalkyl guar, a carboxyalkyl guar, a guar gum, a guar gum powder, a lignified coat of guar seeds or a solidified guar gum.