Abstract: A device (20) for replacing equipment, i.e. modules on an installation (10) on the seabed. The device comprises a box-shaped buoyancy element which has storage spaces (25) for equipment together with winch devices (22) assigned to each storage space. During use the device is lowered from a vessel (1) to the seabed by a crane (3), but is stopped a distance from the installation, whereupon the locally provided winches (22) are used to pull up and position the equipment.

Abstract: A method for connection of a first, stationary pipe (21) with a second, movable pipe on a seabed (20). The first pipe (21) is initially enclosed with clearance by a first sleeve (6) of a rigid frame (1). The second pipe is pulled into the frame (1) and enclosed by a second sleeve (7) of the frame (1). From each sleeve (6,7) there protrudes a pipe connection. The pipe connections are interconnected via an interconnecting pipe. Between each sleeve inside the pipe connections and the pipes (21) connected thereto, a gasket is mounted. The gasket is clamped between the sleeves and the pipes by means of jacks. A perforating device finally provides holes through each sleeve (6,7) and the wall of the associated pipe (21), whereby a communication is obtained between the pipes via the pipe connections and the interconnecting pipe. A device for implementing the method and a device for sealing connection of a sleeve with a pipe.

Abstract: An improvement in a side element of a drilling template for wells at sea for extracting hydrocarbons, wherein the side element is connected to a central section of the drilling template and projects horizontally out therefrom. The side element is arranged to carry equipment of various types. According to the invention the side element comprises a coupling section for releasable connection with a coupling section of the equipment.

Abstract: A method for mounting a seabed installation including a drilling template and a manifold on a mooring device anchored to the seabed. The mooring device comprises an open guide boring. The drilling template and the manifold are arranged to be suspended separately on, and lowered by a string which extends from an offshore platform. The method includes lowering the manifold and inserting a connected guide post which projects down from the manifold, in a guide hole of the drilling template. Thereafter, interacting sections of the central guide post and the guide hole respectively are made to cause an alignment of the manifold in a fixed rotational position relative to the drilling template during the introduction and before the manifold comes into contact with the drilling template. Finally, the manifold is lowered relative to the guide post after the contact thereof in the guide hole. No use is made of guidelines which extend from the platform to the seabed.