METHOD AND DEVICE FOR ASSEMBLING AND DISASSEMBLING THREADED PIPES

摘要

A device for assembling or disassembling a first threaded pipe (1) to or from a second threaded pipe (2) is described, the device including a first machine (12) arranged to lift the first threaded pipe (1), and the device being characterized by the first machine (12) being arranged to lift the first threaded pipe (1) with a force corresponding to the net weight of the first threaded pipe (1); and the first machine being arranged to lift the first threaded pipe (1) with a force equal to the difference between the weight force from the net weight of the first threaded pipe and a desired axial contact force between the first threaded pipe (1) and the second threaded pipe (2) during the make-up or break-out operation, the desired axial contact force being smaller than the weight force from the net weight of the first threaded pipe (1). A method of assembling or disassembling threaded pipes (1, 2) is described as well.

主权项

1. A device for assembling or disassembling a first threaded pipe to or from a second threaded pipe, the device including:
a first machine arranged to lift the first threaded pipe; a second machine arranged to hold the second threaded pipe; and weighting means for determining the net weight of the first pipe, wherein the first machine is arranged to lift the first threaded pipe with a force corresponding to the net weight of the first threaded pipe, and is arranged to lift the first threaded pipe with a force equal to the difference between the net weight of the first threaded pipe and an axial contact force between the first threaded pipe and the second threaded pipe during a make-up or break-out operation, the axial contact force being smaller than the weight force from the net weight of the first threaded pipe.