as salam o alikum

brother if u want to take them to umrah and then come back again to qatar as re entry.....following is the procedure:

1. extend their visa to atleast two months followed with the medical (medical is must for more than 1 months visa)

umrah visa can only b stemped if the visit visa of qatar is more than 2 months validity from the date of application

2. once u get the umrah visa go to gharafa immigration office and ask for re-entry visa which will cost u 100 to 200 QR per person

then u can take them to umrah

dont forget to pray for me

regards,

adeel