Abandonment and recovery system and method, and cable connector
AssigneeAllseas Group S.A.
InventorsAndre Luur Jan Steenhuis, Jeroen Regelink
Life of this patent
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Abstract
A system for abandonment or recovery of a load, e.g., a pipeline or sub-sea structure, includes: at least two cables, each with a length adapted for a certain water depth and with a first end and a second end; a winch system for the at least two cables, the first ends of each cable being connected to the winch system; and a connection device for connecting the second ends of each cable to the load to be abandoned or recovered.
Claims17
System for abandonment or recovery of a load, typically a pipeline or sub-sea structure, comprising:
- at least two cables, each with a length adapted for a certain water depth and with a first end and a second end, for lowering or raising the load;
- a winch system for said at least two cables, said first ends of each cable being connected to the winch system;
- an elongated cable connector with a longitudinal direction for connecting said second ends of each cable to the load to be abandoned or recovered;
- wherein said winch system is arranged to guide the at least two cables into the cable connector,
- wherein the at least two cables extend in the elongated cable connector, in the longitudinal direction thereof.
System for abandonment or recovery of a load, typically a pipeline or sub-sea structure, comprising:
- at least two cables, each with a length adapted for a certain water depth and with a first end and a second end;
- a winch system for said at least two cables, said first ends of each cable being connected to the winch system;
- connecting means for connecting said second ends of each cable to the load to be abandoned or recovered;
- and
- traction regulating means for adjusting the traction in each of the cables such that the rotation of the second ends of the cables is controllable;
- wherein the connecting means are provided with a rotation measuring device for measuring the rotation of the connecting means.
System for abandonment or recovery of a load, typically a pipeline or sub-sea structure, comprising:
- at least two cables, each with a length adapted for a certain water depth and with a first end and a second end;
- a winch system for said at least two cables, said first ends of each cable being connected to the winch system;
- connecting means for connecting said second ends of each cable to the load to be abandoned or recovered;
- wherein the winch system comprises:
- at least a storage winch and a traction winch for each cable;
- at least a storage winch and a traction winch for each cable, placed at one end of the vessel;
- at least a return sheave for each cable placed at the other end of the vessel;
- and
- a number of sheaves for guiding the cables from the storage winches via the traction winches to the return sheaves.
Abandonment and recovery cable connector for abandonment or recovery of a load, comprising:
- a body with a first end and a second end;
- at least one hook provided at said first end;
- connection members for at least two cables for lowering or raising the load;
- a rotation measuring device for measuring the rotation of said body.
Abandonment and recovery cable connector comprising:
- a body with a first end and a second end;
- at least one hook provided at said first end;
- connection members for at least two cables;
- wherein said at least one hook consists of:
- one central hook for recovering a load;
- two side release hooks for abandoning a load via a sling.
Method for abandoning or recovering a load, typically a pipeline or sub-sea structure, at sea, using a multi-cable assembly with at least two cables grouped at a load end in a cable connector;
- wherein the load is connected to the cable connector;
- wherein the load is lowered, respectively raised during abandonment, respectively recovery of the load;
- wherein said at least two cables are released, respectively pulled in during abandonment, respectively recovery of a load,
- wherein the at least two cables extend in a longitudinal direction in the cable connector, the cable connector having an axis parallel to said longitudinal direction,
- wherein the cable connector is rotated around its axis by adjusting the traction in each of said at least two cables.
Dependencies are inferred from the claim text.