TOP DRIVE APPARATUS AND BAILS THEREFOR

摘要

A bail for suspending a top drive, characterised in that the bail comprises a first upper leg portion (16) extending down from a head portion (14) and a second upper leg portion (16a) extending down from the head portion (14), a first lower leg portion (18) extending down from the first upper leg portion (16) and a second lower leg portion (18a) extending down from said second upper leg portion (16a), said first lower leg portion at an angle to said first upper leg portion and said second lower leg portion at an angle to said second upper leg portion.