Patent Grant
8240264
Not applicable
Not applicable
1. Field of the Invention
The present invention relates to marine lifting devices. More particularly, the present invention relates to an improved catamaran type lifting apparatus that employs spaced apart or catamaran hulls, each of the hulls supporting a truss or frame that spans between the hulls at spaced apart positions. Even more particularly, the present invention relates to an improved catamaran lifting apparatus for use in a marine environment, wherein apart frames are connected to the hulls in a configuration that spaces the vessels apart, the first frame connecting with a first of the hulls with the universal joint and to the second hull with a hinged connection, the second frame connecting to the second hull with a universal joint and to the first hull with a hinged connection.
2. General Background of the Invention
A catamaran lifting apparatus that can be used to lift multi-ton objects employs two spaced apart barges or hulls or vessels. In general, such lifting devices that employ a pair of spaced apart hulls have been patented, many patents having been issued to applicant as contained in the following table.
The present invention provides an improved catamaran lifting apparatus that employs first and second spaced apart vessels or hulls. The vessels can be barges, dynamically positioned marine vessels, other floating hulls or the like.
A first frame or truss spans between the hulls at a first position. A second frame or truss spans between the hulls at a second position. The first and second positions are spaced apart so that each frame can move independently of the other, notwithstanding wave action acting upon the hulls.
The first of the frames or trusses connects to the first hull with a universal joint and to the second hull with a hinged connection. The second frame connects to the second hull with a universal joint and to the first hull with a hinged connection. The catamaran hull arrangement provides longitudinal flexibility in a quartering sea state due to the unique universal joint and hinge placement between the frames or trusses and the hulls or barges.
Each frame extends upwardly in a generally inverted u-shape that provides space under the frame and in between the hulls for enabling a marine vessel to be positioned in between the hulls and under the frames. The space in between the hulls and under the frames can also be used as clearance for elevating an object to be salvaged from the seabed to a position next to or above the water's surface.
In a plan view, each frame can be generally triangular in shape. The frames can each be of a truss configuration.
In a second embodiment, one or more slings can be provided that connect between a frame and a hull. The connection of each frame to a hull opposite the universal joint can be a pinned or a hinged connection.
The present invention includes a method of salvaging an underwater object comprising the steps of providing first and second vessels at a locale that is next to an underwater object to be salvaged, mounting a first frame on the vessels that spans between the vessels, mounting a second frame on the vessels that spans between the vessels, connecting the frames to the vessels in a configuration that spaces the vessels apart, connecting the first frame to the first barge with a universal joint and to the second barge with a connection that is not a universal joint, connecting the second frame to the second barge with a universal joint, and to the first barge with a connection that is not a universal joint, providing a space under the frame and in between the vessels, enabling a third marine vessel to be positioned in between the vessels and under the frames, and lifting the object with cabling that extends downwardly from the frames.
Preferably, rigging is connected between each frame and the object to be salvaged, the rigging including slings and hooks.
Preferably, the underwater object to be salvaged is a platform structure having a deck and beams under the deck and further comprising extending rigging through the deck via one or more deck openings and connecting the rigging to beams under the deck.
Preferably, each frame has an upper end portion and the rigging extends between the object to be salvaged and the upper end portions of the frames.
Optionally, mounting a winch and winch cabling on the vessels and frames and further comprising lifting the object to be salvaged with the winch and winch cabling.
Optionally, mounting a winch and winch cabling on the vessels and frames and further comprising lifting the object to be salvaged with the winch and winch cabling, and further comprising attaching rigging that includes a hook suspended from the winch cabling and one or more slings attached to the object to be salvaged and to the hook.
Optionally, the cabling of the step of lifting the object with cabling that extends downwardly from the frames, including more than one lifting line.
Optionally, in the step of lifting the object with cabling that extends downwardly from the frames, the cabling includes multiple winds of cabling rigged to a block and tackle pulley arrangement.
Preferably, spanning one or more beams between the frames and in the step of lifting the object with cabling that extends downwardly from the frames, the cabling depends from the beams.
The invention includes a method of salvaging an underwater object from a seabed area comprising the steps of providing first and second spaced apart hulls, spanning between the hulls with a first arch, spanning between the hulls with a second arch, spacing the arches apart by connecting the hulls together in a configuration that spaces the hulls apart, connecting the first arch to the first hull with a universal joint, connecting the first arch to the second hull with a connection that is not a universal joint, connecting the second arch to the second hull with a universal joint, connecting the second arch to the first hull with a connection that is not a universal joint, extending each arch upwardly in an inverted u-shape, providing a space under the arches and in between the hulls, and lifting the object to be salvaged from the seabed area with rigging fitted to the arches.
Preferably, each arch supports one or more beams and in the step of lifting the object to be salvaged from the seabed area with rigging fitted to the arches, the rigging includes the beams.
Preferably, the rigging includes a pair of beams.
Preferably, the first arch is a truss.
Preferably, the second arch is a truss.
Optionally, the underwater object is a platform having a deck and further comprising one or more slings that connect between the rigging and the platform.
Optionally, the underwater object is a platform having a deck and further comprising one or more slings that connect between the rigging and the platform, and providing a hook as part of the rigging.
Optionally, the underwater object is a platform having a deck and further comprising one or more slings that connect between the rigging and the platform, and providing a hook as part of the rigging, and wherein the sling spans between the hook and the platform and the sling extending through the deck.
Preferably, the first arch is much wider at one end portion than at its other end portion.
Preferably, the second frame is much wider at one end portion than at its other end portion.
The invention includes a method of salvaging an underwater object, comprising the steps of providing a pair of floating hulls, spanning between the hulls with a first frame, spanning between the hulls with a second frame, wherein the frames are spaced apart and connected to the hulls in a configuration that spaces the hulls apart, connecting the first frame to the first hull with a universal joint connection and to the second hull with a connection that is not a universal joint, connecting the second frame to the second hull with a universal joint connection, and to the first hull with a connection that is not a universal joint, extending each frame upwardly and providing a space under the frame and in between the hulls, lifting the object with rigging attached at least in part to the frames, and wherein the connecting of the frames to the hull is with four separate connections.
Preferably, each frame supports one or more beams that are a part of the rigging of the step of lifting the object with rigging attached at least in part to the frames.
Preferably, the rigging includes one or more beams that are connected to the frames.
Preferably, the first frame is a truss.
Preferably, the second frame is a truss.
Preferably, supporting one or more beams with the frames and, in the step of lifting the object with rigging attached at least in part to the frames, the rigging is fitted to the beams.
Optionally, supporting one or more beams with the frames and, in the step of lifting the object with rigging attached at least in part to the frames, the rigging is fitted to the beams, and suspending a crown block from the beams as part of the rigging.
Optionally, supporting one or more beams with the frames and, in the step of lifting the object with rigging attached at least in part to the frames, the rigging is fitted to the beams, and suspending a hook from the beams as part of the rigging.
Preferably, the first frame is much wider at one end portion than at its other end portion.
Preferably, the second frame is much wider at one end portion than at its other end portion.
Preferably, each frame has end portions, one end portion being wider than the other at a position where the frame end portions connect to a hull.
Preferably, each frame is generally arch shaped.
The invention includes a method of raising a submerged object from a seabed area in a marine locale comprising the steps of transporting a floating support structure to the marine locale that includes spaced apart deck areas with an open space therebetween, connecting a pair of arches to the floating support structure with connections that include multiple universal joints and multiple connections that are not universal joints, and wherein one universal joint is on one deck area and supports a first of said arches and the other universal joint is on a second deck area and supports a second of said arches, lifting the submerged object from the seabed area with rigging that is supported by the floating support structure and arches, and wherein the object lifted is lifted to the open space.
Preferably, the floating support structure includes a catamaran.
Optionally, including using multiple hulls to transport the floating support structure, said hulls being a part of the support structure.
Optionally, including using multiple vessels to transport the floating support structure, said vessels being a part of the support structure.
Optionally, each arch has a wide end portion and a narrow end portion, and further comprising the step of connecting the narrow end of each arch to the floating support structure with a universal joint.
Optionally, each arch has a wide end portion and a narrow end portion, and further comprising the step of connecting the wide end of each arch to the floating support structure with a hinge.
Optionally, each arch has a wide end portion and a narrow end portion, and further comprising the step of connecting the narrow end of each arch to the floating support structure with a universal joint, and further comprising the step of connecting the wide end of each arch to the floating support structure with a hinge.
Preferably, the floating structure is a catamaran and further comprising the step of connecting a pair of arches to the floating support structure with connections that include multiple universal joints and multiple connections that are not universal joints, and wherein one universal joint is on one deck area and supports a first of said arches and the other universal joint is on a second deck area and supports a second of said arches, being completed before the completion of the step of transporting a floating support structure to the marine locale that includes spaced apart deck areas with an open space therebetween.
Preferably, the step of connecting a pair of arches to the floating support structure with connections that include multiple universal joints and multiple connections that are not universal joints, and wherein one universal joint is on one deck area and supports a first of said arches and the other universal joint is on a second deck area and supports a second of said arches, is completed before the step of transporting a floating support structure to the marine locale that includes spaced apart deck areas with an open space therebetween.
Preferably, the rigging includes one or more beams that span between the arches and further comprising suspending a crown block from the beam or beams.
Optionally, at least one of the winches is mounted on a vessel.
Optionally, at least one of the winches is mounted on a frame.
Optionally, the rigging in the step of lifting the object to be salvaged from the seabed area with rigging fitted to the arches includes a winch mounted on a said deck and a winch cable rigged to the winch and to a said frame.
Optionally, the rigging in the step of lifting the object to be salvaged from the seabed area with rigging fitted to the arches includes a winch mounted on a said frame and a winch cable rigged to the winch and to a said frame.
Optionally, the rigging in the step of lifting the object with rigging attached at least in part to the frames includes a winch mounted on a said deck and a winch cable rigged to the winch and to a said frame.
Optionally, the rigging in the step of lifting the object with rigging attached at least in part to the frames includes a winch mounted on a said frame and a winch cable rigged to the winch and to a said frame.
Optionally, the rigging in the step of lifting the submerged object from the seabed area with rigging that is supported by the floating support structure and arches includes a winch mounted on a said deck and a winch cable rigged to the winch and to a said frame.
Optionally, the rigging in the step of lifting the submerged object from the seabed area with rigging that is supported by the floating support structure and arches includes a winch mounted on a said frame and a winch cable rigged to the winch and to a said frame.
For a further understanding of the nature, objects, and advantages of the present invention, reference should be had to the following detailed description, read in conjunction with the following drawings, wherein like reference numerals denote like elements and wherein:
The frame 13 connects to hull 11 with universal joint 15. The frame 13 connects to vessel 12 with pinned connection or hinge 16. Similarly, the second frame 14 connects to hull 12 with a universal joint 17 and to hull 11 with a hinge or pinned connection 18.
An interface such as a deck beam can be provided on the upper deck 30 of each hull 11, 12 for forming an interface between the frames 13, 14 and the vessels 11, 12. For example, vessel 11 is provided with deck beam 19 that forms an interface between each of the frames 13, 14 and the barge or vessel 11. Deck beam 20 provides an interface between each of the frames 13, 14 and the vessel or barge 12.
In
In
Each of the frames 13, 14 can be in the form of a truss as shown. Each frame 13, 14 can thus provide a center truss section 27, a smaller side truss section 28 and another smaller side truss section 29. Pinned connections 31, 32 can be provided for attaching the smaller truss sections 28, 29 to the larger center truss section 27 as shown in
One or more hooks 40 or other lifting fitting can be attached to a lifting line 41 and payed out from winch 42. Sheaves 43, 44, 45 as needed can be used to route the line 41 from winch 42 to hook 40. Line 41 can be a multiple line assembly to increase lift capacity. Hook 40 can be any lifting fitting such as any known crown block, for example.
Dynamic positioning may either be absolute in that the position is locked to a fixed point over the bottom, or relative to a moving object like another ship or an underwater vehicle. One may also position the ship at a favorable angle towards the wind, waves and current, called weathervaning. Dynamic position is much used in the offshore oil industry. There are more than 1,000 dynamic positioning ships in existence.
In
Load spreader platforms can be provided to define an interface between each of the frames 13, 14 and the dynamically positioned vessels 46, 47. Load spreader platform 56 is positioned under articulating connection 15 while load spreader platform 57 is positioned under hinge or pinned connection 16. Load spreader platform 58 is positioned under articulating connection 17, forming an interface between that connection 17 and the deck 48 of vessel 46. Similarly, load spreader platform 59 forms an interface between deck 52 of vessel 47 and hinged or pinned connection 18 as shown in
In the preferred embodiment, the frames 13, 14 are positioned in between the pilot house of each dynamically positioned vessel and the stern of each dynamically positioned vessel as shown in
As with the preferred embodiment of
The following is a list of parts and materials suitable for use in the present invention.
All measurements disclosed herein are at standard temperature and pressure, at sea level on Earth, unless indicated otherwise. All materials used or intended to be used in a human being are biocompatible, unless indicated otherwise.
The foregoing embodiments are presented by way of example only; the scope of the present invention is to be limited only by the following claims.
This is a continuation of U.S. patent application Ser. No. 12/337,305, filed Dec. 17, 2008 (issued as U.S. Pat. No. 7,886,676 on 15 Feb. 2011), which is a nonprovisional of U.S. Provisional Patent Application Ser. No. 61/014,291, filed Dec. 17, 2007, each of which is hereby incorporated herein by reference. Priority of U.S. Provisional Patent Application Ser. No. 61/014,291, filed Dec. 17, 2007, incorporated herein by reference, is hereby claimed. Incorporated herein by reference are the following: U.S. patent application Ser. No. 12/760,026, filed Apr. 14, 2010, now abandoned; U.S. patent application Ser. No. 12/411,948, filed Mar. 26, 2009, now abandoned.
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| Number | Date | Country | |
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| Number | Date | Country | |
|---|---|---|---|
| Parent | 12337305 | Dec 2008 | US |
| Child | 13028011 | US |
