Multiple-tube flexible pipe having high compressive strength
First Claim
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1. A multipipe flexible pipeline comprising:
- a central flexible element having a high tensile strength and a high compressive strength;
a jacket around and radially spaced outward from the central flexible element defining an annular space between the central flexible element and the jacket;
a plurality of peripheral pipes arrayed around the central flexible element in at least one ply and passing through the annular space and along the central flexible element;
at least one of the peripheral pipes being a first pipe which is sensitive to compression and/or tension;
at least one flexible compressive-load-transferring member in the annular space adjacent to the at least one first pipe for receiving load applied to the pipeline.
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Abstract
A multiple-tube flexible pipe (1) including a central flexible member (2) having high tensile and compressive strength, a casing (8) and a plurality of circumferentially arranged tubes (3) wound around the central flexible member to form at least one ply in a ring-shaped space between said central flexible member (2) and said casing (8). At least one of said circumferentially arranged tubes (3) has low compressive and/or tensile strength. The flexible pipe further comprises at least one flexible compressive force transmitting member (5) arranged in said ring-shaped space and adjacent to said tube (3, 4) having low compressive and/or tensile strength.
59 Citations
26 Claims
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1. A multipipe flexible pipeline comprising:
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a central flexible element having a high tensile strength and a high compressive strength; a jacket around and radially spaced outward from the central flexible element defining an annular space between the central flexible element and the jacket; a plurality of peripheral pipes arrayed around the central flexible element in at least one ply and passing through the annular space and along the central flexible element;
at least one of the peripheral pipes being a first pipe which is sensitive to compression and/or tension;at least one flexible compressive-load-transferring member in the annular space adjacent to the at least one first pipe for receiving load applied to the pipeline. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification