Apparatus and method for cutting tubular parts subsea

摘要

The present invention concerns an apparatus for cutting a tubular part (16) extending down into a sea- or ocean bed. The apparatus includes a carrying body (1) adapted to be led over the tubular part (16) that is to be cut, with a cutting assembly placed in the carrying body (1). The cutting assembly includes a ring adapted to be driven in rotation in the carrying body (1). At least one cutting element (6) with a cutting portion (19), is hinged to the ring. At least one actuator (3) is adapted for leading the cutting element (6) between a retracted position and a cutting position against the tubular part (16) that is to be cut. Furthermore it is described an assembly with a cutting apparatus (A) and a carrying body (1) with a least one jaw (15, 28, 29) for fixing and centring the tubular part (16) in relation to the apparatus (A), and a method for subsea cutting of tubular parts (16).

主权项

1. An apparatus for cutting a tubular part extending down into a sea or ocean bed, below the seabed, wherein the apparatus includes:
a carrying body with a cutting assembly placed in the carrying body, wherein said cutting assembly includes a continuous ring adapted to be driven in rotation in the carrying body and the carrying body is configured to receive a tubular part where an end of the tubular part is inserted into the carrying body; at least one pivotally attached cutting element with a cutting edge, hinged to the continuous ring at a first joint; at least one actuator coupled at a second joint in the cutting element, and for pivoting the cutting element about the first joint between a retracted position and a cutting position towards the tubular part that is to be cut; at least one sensor configured to measure a position of each cutting element and a force applied to each cutting element; at least one jaw or wedge for holding and centering the tubular part in relation to the cutting assembly; and at least one actuator connected to the body and the at least one jaw for pressing the jaw or wedge against the tubular part.