Patent ID: 7228913

Claim:
An apparatus for releasably clamping and holding a member for wellbore operations, the apparatus comprising a main body, two opposed clamping apparatuses in the main body, the two opposed clamping apparatuses spaced-apart for selective receipt therebetween of a member to be clamped therebetween, each of the two opposed clamping apparatuses having a mount and piston apparatus movable within the mount, the piston apparatus selectively movable toward and away from the member to be clamped, two legs, the legs spaced-apart and each leg with an upper end and a lower end, each lower end connected to the main body, each leg comprising an outer leg portion and an inner leg portion, the inner leg portion having part thereof movable within the outer leg portion to provide a range of up and down movement for the main body, and chain connection structure on each outer leg portion and each inner leg portion to which a chain is connectible to prevent separation of the outer leg portions from the inner leg portions.