I met a girl in thailand and would like to fetch her to the uk but don't know how to go about it i.e. passport for her visas etc. anyone help please

UK Border Agency | Can my husband, wife or civil partner come to live in the United Kingdom? (http://ukba.homeoffice.gov.uk/ukresidency/eligibility/partnersandchildren/husbandwifecivilpartner/)

Need to know how long a visa is good for from acca to the united states and what is a visa R/K1

How long is a vesa to the united state of american from accra ghana good for visa R/typeK1