METHOD OF REMOVING WELLHEAD ASSEMBLIES

摘要

The invention provides a method of cutting a well casing located beneath a subsea wellhead (1), the method comprising the steps of: running a cutting tool through the wellhead (1) into the casing; securing the position of a motor ( 7) relative to the wellhead (1) so as to transmit rotary reaction forces from the motor (7) to the wellhead (1) or a fixture secured relative to the wellhead; and operating th e motor (7) so as to rotate the cutting tool and thereby effect cutting of the casin g. The invention overcomes the problems associated with prior art techniques of requiring the use of explosive charges or a drilling rig located above the wellhead.