Abstract: A method and arrangement for well completion and intervention operations where a workover riser 4 projecting from a wellhead 6 and up to a vessel 2 is used, and where the upper portion of the workover riser 4 is designed to be displaced from an upper position to a lowered position favorable for rigging work, where at least the upper displaceable portion of the workover riser 4 essentially follows the heave motion of the vessel 2, whereupon the upper displaceable portion of the workover riser 4 is again raised to its upper position, the workover riser 4 being equipped with a telescoping connection 1.

Abstract: A method and arrangement for well completion and intervention operations where a workover riser 4 projecting from a wellhead 6 and up to a vessel 2 is used, and where the upper portion of the workover riser 4 is designed to be displaced from an upper position to a lowered position favourable for rigging work, where at least the upper displaceable portion of the workover riser 4 essentially follows the heave motion of the vessel 2, whereupon the upper displaceable portion of the workover riser 4 is again raised to its upper position, the workover riser 4 being equipped with a telescoping connection 1.

Abstract: A slip joint for a riser between a well and a floating petroleum installation, for example an oil platform. The slip joint includes, an outer pipe and an inner pipe, the pipes arranged to enable telescopic movement relative to one another in order to compensate for a change in distance between the sea bottom and the platform. The inner pipe is connected to a piston, the piston being operable in response to hydraulic pressure for inflicting a tensile force on riser. The outer diameter of the inner pipe is adapted to the diameter of outer pipe so as to form an annulus between the pipes. The piston is fixedly connected to inner pipe at or close to a downwardly directed end thereof, the annulus and the piston being subjected to hydraulic pressure. A protective sleeve is provided below the piston, which is slippingly arranged within outer pipe.