OK will it fit?

I have a 7" steel casing (I understand that it was cheap oil well surplus).

I have a 2" drop pipe with sucker rod to a brass pump with a 1/2 hp electric under that.

Is there a solar pump that will fit between the casing and the 2" pipe, or could I install it below the electric pump and use poly up and around the rest of the mess.

Rancher