Patent ID: 7784535

Claim:
A top drive system for wellbore operations, the top drive system comprising a top drive apparatus, bails for supporting the top drive apparatus and from which the top drive apparatus is suspended, the bails comprising a first bail and a second bail, each of the first bail and second bail comprising a generally oval cross-sectional shaped body with an upper head portion, the body having two spaced-apart legs, each leg comprising an upper leg portion and a lower leg portion, the two upper leg portions connected to the upper head portion and projecting down therefrom, the upper leg portions non-parallel to each other and each upper leg portion extending from the upper head portion at an upper angle to a centerline of the bail, and each lower leg portion extending down from a corresponding upper leg portion, each lower leg portion at an angle to a corresponding upper leg portion, and projecting out from the centerline of the bail in a reverse bend with respect the corresponding upper leg portion, each lower leg portion having a bottom end and wherein a bend is formed at the interface of each upper leg portion and lower leg portion, the bend located to balance bending moments in each bail.