Supports – Pipe or cable – Tool cord or tube
Patent
1992-06-16
1994-01-11
Foss, J. Franklin
Supports
Pipe or cable
Tool cord or tube
13735517, 248 49, F16L 300
Patent
active
052773868
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement in chain-like conveyor devices for protecting accommodation and controlled guidance of flexible cables/hoses/lines to be extended between a stationary unit, a fixed production platform, and one relatively thereto displaceable unit, a derrick, displaceable in two directions intersecting each other at right angles, and wherein said displacements take place in one or two parallel horizontal planes, said chain-like conveyor device substantially comprising interhinged chain link-like single members, has a first stationary end, the other end thereof being coupled to the displaceable unit, so that said other end is brought to follow the displacement movements of the displaceable unit in said horizontal planes, and wherein the chain-like conveyor has the form of a carriage train, the chain link-like carriage members thereof having axes extending perpendicular to or substantially perpendicular to said horizontal planes, the conveyor device/carriage train for securing a controlled movement in said planes, is assigned external guiding and guide means.
Such a chain-like conveyor device wherein said cables/hoses/lines are to be suspended in a large number, serves generally the purpose of enabling a protected support of the cables/hoses/lines through arranged, controlled guidance of the same during said movements between various positions.
It goes without saying that such a cable/hose-conveyor may be used advantageously in a number of different fields. Examples of application areas are production platforms for oil and gas, as well as the mining industry.
In the following, the invention will be described with particular regard to its application in association with offshore production platforms for oil and gas. Nevertheless, as it would be appreciated, this is only an example of a possible application of use, the general field of utilization of the invention merely presupposing that cables, hoses or lines from stationary drive aggregates/power generators are to be extended to an "operating head" movable in two mutually intersecting directions, or to a plurality of such heads, at which power take-off(s) is/are arranged.
In a stationary platform structure, wherein the platform is either stationarily installed on the seabed, or moored in such a manner that it can not be moved, the derrick must be displaceable to and fro in the directions mentioned previously, in order to correspond with one after the other of a plurality of bore holes, e.g. positioned in two substantially parallel rows.
In order to move the derrick between a number of desired positions, the platform is equipped with a skid base carrying the derrick and being movable to and fro in a first direction, the X-direction, in the horizontal plane. More particularly, this skid base is displaceably supported on parallel slide rails mounted on the well head module of the platform. The displacement of the skid base is effected by means of hydraulic gripper jaws and pressure cylinders, by means of which it pulls itself forward along said slide rails.
The derrick substructure is displaceably supported in a second direction, the Y-direction, perpendicular to the first-mentioned direction, along slide rails on the top of the skid base, said substructure being capable of pulling itself forward in this second direction in a manner similar to that of the skid base.
During the displacement of the derrick, all systems needed during the operation of the derrick are to be linked up between the platform and the derrick, the reason being that off/on coupling will be extremely time-consuming, involving approximately 150 cables (high voltage and low voltage cables as well as instrumentation cables) and about 25 hoses (high pressure and low pressure hoses).
Dependent on the number of wells and their mutual positioning, it is known to put on the following arrangements:
So-called aerial cables/hoses are frequently used when the number of wells is relatively small and the wells are positioned within a small area. This prior art solution req
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Foss J. Franklin
Merlin Teknologi AS
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