Whenever the session of any court of record is prolonged beyond the week or period for which juries were drawn at the close of the preceding term, or where the judge anticipates that the same is about to be so prolonged, or where from any other cause the court has convened or is about to convene and there have been no juries drawn for the same, the judge, in the manner prescribed for drawing juries at the close of the regular term, shall draw such juries as may be necessary and shall cause them to be summoned.