import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-2,0))
r=w0.sketch().arc((-20,7),(45,-23),(-16,15)).arc((-13,8),(-20,7)).assemble().finalize().extrude(-3).union(w0.workplane(offset=7/2).moveTo(-31,23).cylinder(7,19))