my name is suresh bk iam from nepal .i work before...

Kindly be noted that we cannot determine the duration to get the visa. This is governed by the Department of Immigration and Passports. With regard to obtaining a work residence in Qatar, here is the following information:
You can get residence in Qatar after obtaining work in Qatar and with the work permit, and the responsibility of the employer is to carry out all the procedures required to obtain the residence permit necessary for the expatriate.
After the arrival of the expatriate, the employer obtains a temporary entry visa and then works to convert it into a residence permit.
It is possible that job applicants will not leave the country during the period of converting a visa to a permit.
After the foreigner receives the special residence permit, he can obtain many other services, such as applying for other permits and licenses, signing a housing rental contract, applying for a loan and many more.
Finally, be informed that the work permit is renewed annually by the employer. Moreover, the expatriate can sponsor his family members. A residence visa is required for each family member, including infants, and residence can be obtained for a period ranging from one to five years and printed on the passport of each family member.