Extension of single exit reentry visa

Hello.                                                                       
Am an Indian nurse currently working in Saudi Arabia in AL Qassim region. I  have taken 4 months single exit reentry visa but now I need to extend it for one more month before going to India. Is it possible to extend it without cancelation if the first visa???

Dear Annie

Was it mutiple exit reentry??It depends whether you had used your exit entry yet or not...