Abstract: A starch product suitable for use in drilling muds, a method for producing the same, a drilling mud containing said product and a method for drilling a well.The starch product is obtained by drying the debris recovered from peeling potatoes. The production is preferably performed by washing the potatoes (50) and peeling them (51), yielding rasped potatoes (56) and peel debris (51a). A great part of the water contained in said peel debris (51a) is removed in a decanter (52) and the remainder is subsequently dried (53), yielding the product (55).