problem with runner beans

I have some runner beans that I sowed a couple of weeks back. They have germinated but the stems are 8 inches long before the first two leaves. They don't seem like others I have had. Should I repot and bury some of the stem in compost?

Thanks.  OK I'll plant them up canes at the weekend   Phew I've been having a disaster with my runner beans this year.  This is my third attempt, a bit late now I know.