A drilling conductor 32 supported within a suction anchor 28 is installed by lowering the production anchor 28 through the top of a frame of a subsea processing unit 10. The base of the frame defines a landing area 38 for the suction anchor and supports a fixing system for fixing the suction anchor 28 to the frame. When the suction anchor 28 has been embedded into the seabed beneath the processing unit, the frame is fixed to the suction anchor to form a structural unit that comprises the conductor 32, the suction anchor 28 and the frame. Additional equipment such as a blow-out preventer or a Christmas tree may then be lowered through the top of the frame and onto the conductor that is supported by the embedded suction anchor. A method of installing the apparatus is also claimed.
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