초록 ▼

A hydraulically actuated slip assembly having a slip pivotally connected at its sides by parallel links to the side surfaces of a slip block with slip engaging surfaces which allow the slip to be engaged and disengaged from tubing or pipe and operated within a reduced area. An alternative embodiment

A hydraulically actuated slip assembly having a slip pivotally connected at its sides by parallel links to the side surfaces of a slip block with slip engaging surfaces which allow the slip to be engaged and disengaged from tubing or pipe and operated within a reduced area. An alternative embodiment utilizes a floating die to allow the parallel links to disengage the slip from the pipe in a compact configuration.

대표청구항 ▼

A slip assembly adapted to engage pipe for movement of pipe into or out of a well bore comprising: a slip having a pipe engaging surface and a slip block contact surface; a slip block which engages the slip along a slip contact surface that is angled with respect to the pipe engaging surface; parall

A slip assembly adapted to engage pipe for movement of pipe into or out of a well bore comprising: a slip having a pipe engaging surface and a slip block contact surface; a slip block which engages the slip along a slip contact surface that is angled with respect to the pipe engaging surface; parallel vertically spaced links which pivotally connect the slip and slip block for movement of the slip into engagement with the slip block along said contact surfaces, each link having a first end pivotally connected to the slip and a second end pivotally connected to the slip block; and which, during both engagement and disengagement of the pipe engaging surface of the slip with the pipe, maintains said pipe engaging surface substantially parallel to the axis of the pipe; and actuating means for pivoting the link to move the slip relative to the slip block, said actuating means being pivotally connected to said link between the second end of the link and the mid-point of the link between the pivotal connections on the first and second ends of the link.