hiya,
tourist visa irrespective of the nationality is upto 28 days after that one should exit the country and if the national has an on arrival visa status then its well and good or other wise it should be taken once again.

Tourist visa could be converted to family visit, by a visa status change wherre you have to pay 500QAR.

If the tourist visa also could be converted to RP as well as buisness visa under the same sponsor.