U.S. patent application number 12/411948 was filed with the patent office on 2010-07-01 for marine lifting apparatus.
Invention is credited to Jon Khachaturian.
Application Number | 20100162935 12/411948 |
Document ID | / |
Family ID | 42781765 |
Filed Date | 2010-07-01 |
United States Patent
Application |
20100162935 |
Kind Code |
A1 |
Khachaturian; Jon |
July 1, 2010 |
Marine Lifting Apparatus
Abstract
A catamaran lifting apparatus is disclosed for lifting objects
in a marine environment. The apparatus includes first and second
vessels that are spaced apart during use. A first frame spans
between the vessels. A second frame spans between the vessels. The
frames are spaced apart and connected to the vessels in a
configuration that spaces the vessels apart. The first frame
connects to the first vessel with a universal joint and to the
second vessel with a hinged connection. The second frame connects
to the second vessel with a universal joint and to the first vessel
with a hinged or pinned 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 of the frames extends
upwardly in an inverted u-shape, providing a space under the frame
and in between the barges that enables a marine vessel to be
positioned in between the barges and under the frames. In this
fashion, an object that has been salvaged from the seabed can be
placed upon the marine vessel that is positioned in between the
barges and under the frames. Alternatively, a package that is to be
lifted from the deck of a marine vessel, workboat, supply boat or
the like can be lifted from the deck of the workboat, vessel,
barge, etc. if it is to be then placed in the marine environment
such as upon an existing jacket or other under support.
Inventors: |
Khachaturian; Jon; (New
Orleans, LA) |
Correspondence
Address: |
GARVEY SMITH NEHRBASS & NORTH, LLC
LAKEWAY 3, SUITE 3290, 3838 NORTH CAUSEWAY BLVD.
METAIRIE
LA
70002
US
|
Family ID: |
42781765 |
Appl. No.: |
12/411948 |
Filed: |
March 26, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
11610271 |
Dec 13, 2006 |
7527006 |
|
|
12411948 |
|
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Current U.S.
Class: |
114/51 |
Current CPC
Class: |
B63C 3/06 20130101; B63B
2001/123 20130101; B63B 27/10 20130101; B63C 7/16 20130101; B63B
1/121 20130101; B63C 7/04 20130101 |
Class at
Publication: |
114/51 |
International
Class: |
B63C 7/02 20060101
B63C007/02 |
Claims
1. A method of salvaging an underwater object comprising the steps
of: a) providing first and second vessels at a locale that is next
to an underwater object to be salvaged; b) mounting a first frame
on the vessels that spans between the vessels; c) mounting a second
frame on the vessels that spans between the vessels; d) connecting
the frames to the vessels in a configuration that spaces the
vessels apart; e) connecting the first frame to the first barge
with a universal joint and to the second barge with a hinged
connection that is not a universal joint; f) connecting the second
frame to the second barge with a universal joint, and to the first
barge with a hinged connection that is not a universal joint; g)
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 h) lifting the object with
cabling that extends downwardly from the frames.
2. The method of claim 1 further comprising the step of connecting
rigging between each frame and the object to be salvaged, said
rigging including slings and hooks.
3. The method of claim 1 further comprising the step of connecting
rigging between each frame and the object to be salvaged, said
rigging including slings and hooks.
4. The method of claim 1 wherein 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.
5. The method of claim 1 wherein the rigging extends between the
object to be salvaged and the upper end portion of the frames.
6. The method of claim 1 further comprising mounting a winch and
winch cabling on the combination of vessels and frames and further
comprising lifting the object to be salvaged with the winch and
winch cabling.
7. The method of claim 1 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.
8. The method of claim 1 further comprising the step of rigging
more than one lifting line to a frame.
9. The method of claim 1 wherein in step "h" the cabling includes
multiple winds of cabling rigged to a block and tackle pulley
arrangement.
10. The method of claim 1 further comprising the step of spanning
one or more beams between the frames and in step "h" the cabling
depends from the beams.
11. A method of salvaging an underwater object from a seabed area
comprising the steps of: a) providing first and second spaced apart
hulls; b) spanning between the hulls with a first arch; c) spanning
between the hulls with a second arch; d) spacing the arches apart
by connecting the hulls together in a configuration that spaces the
hulls apart; e) connecting the first arch to the first hull with a
universal joint; f) connecting the second arch to the second hull
with a hinged connection that is not a universal joint; g)
connecting the second arch to the second hull with a universal
joint; h) connecting the first arch to the first hull with a hinged
connection that is not a universal joint; i) extending each arch
upwardly in an inverted u-shape, providing a space under the arches
and in between the hulls; and j) lifting the object to be salvaged
from the seabed area with rigging fitted to the arches.
12. The method of claim 11 wherein each arch supports one or more
beams and in step "j" the rigging includes the beams.
13. The method of claim 11 wherein the rigging includes a pair of
beams.
14. The method of claim 11 wherein the first arch is a truss.
15. The method of claim 11 wherein the second arch is a truss.
16. The method of claim 11 wherein the underwater object is a
platform having a deck and further comprising one or more slings
that connect between the rigging and the platform.
17. The method of claim 16 further comprising the step of providing
a hook as part of the rigging.
18. The method of claim 17 wherein the sling spans between the hook
and the platform and the sling extending through the deck.
19. The method of claim 11 wherein the first arch is much wider at
one end portion than at its other end portion.
20. The method of claim 11 wherein the second frame is much wider
at one end portion than at its other end portion.
21. A method of salvaging an underwater object, comprising the
steps of: a) providing a pair of floating hulls; b) spanning
between the hulls with a first frame; c) spanning between the hulls
with a second frame; d) wherein in steps "b" and "c", the frames
are spaced apart and connected to the hulls in a configuration that
spaces the hulls apart; e) connecting the first frame to the first
hull with a universal joint and to the second hull with a hinged
connection that is not a universal joint; f) connecting the second
frame to the second hull with a universal joint, and to the first
hull with a hinged connection that is not a universal joint; g)
extending each frame upwardly and providing a space under the frame
and in between the hulls; and h) lifting the object with rigging
attached at least in part to the frames.
22. The method of claim 21 wherein each frame supports one or more
beams that are a part of the rigging of step "h".
23. The method of claim 21 wherein the rigging includes one or more
beams that are connected to the frames.
24. The method of claim 21 wherein the first frame is a truss.
25. The method of claim 21 wherein the second frame is a truss.
26. The method of claim 21 further comprising the step of
supporting one or more beams with the frames and in step "h" the
rigging is fitted to the beams.
27. The method of claim 26 further comprising suspending a crown
block from the beams as part of the rigging.
28. The method of claim 26 further comprising suspending a hook
from the beams as part of the rigging.
29. The method of claim 21 wherein the first frame is much wider at
one end portion than at its other end portion.
30. The method of claim 21 wherein the second frame is much wider
at one end portion than at its other end portion.
31. The method of claim 21 wherein 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.
32. The method of claim 21 wherein each frame is generally arch
shaped.
33. A method of raising a submerged object from a seabed area in a
marine locale comprising the steps of: a) transporting a floating
support structure to the marine locale that includes spaced apart
deck areas with an open space therebetween; b) connecting a pair of
arches to the floating support structure with connections that
include multiple universal joints and multiple hinges that are not
universal joints; c) lifting the submerged object from the seabed
area with rigging that is supported by the combination of floating
support structure and arches; and d) wherein the object lifted in
step "c" is lifted to the open space of step "a".
34. The method of claim 33 wherein in step "a" the floating support
structure includes a catamaran.
35. The method of claim 33 wherein step "a" includes using multiple
hulls to transport the floating support structure, said hulls being
a part of the support structure.
36. The method of claim 33 wherein step "a" includes using multiple
vessels to transport the floating support structure, said vessels
being a part of the support structure.
37. The method of claim 33 wherein 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 of step "b".
38. The method of claim 33 wherein 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 of step "c".
39. The method of claim 37 wherein 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 of step "c".
40. The method of claim 33 wherein in step "a" the floating
structure is a catamaran and further comprising step "b" being
completed before the completion of step "a".
41. The method of claim 33 wherein step "b" is completed before
step "a".
42. The method of claim 33 wherein the rigging in step "c" includes
one or more beams that span between the arches and further
comprising suspending a crown block from the beam or beams.
43. The method of claim 34 wherein step "b" is completed before
step "a".
44. The method of claim 35 wherein step "b" is completed before
step "a".
45-56. (canceled)
57. The method of claim 6 wherein at least one of the winches is
mounted on a vessel.
58. The method of claim 6 wherein at least one of the winches is
mounted on a frame.
59. The method of claim 11 wherein the rigging in step "j" includes
a winch mounted on a said deck and a winch cable rigged to the
winch and to a said frame.
60. The method of claim 11 wherein the rigging in step "j" includes
a winch mounted on a said frame and a winch cable rigged to the
winch and to a said frame.
61. The method of claim 21 wherein the rigging in step "h" includes
a winch mounted on a said deck and a winch cable rigged to the
winch and to a said frame.
62. The method of claim 21 wherein the rigging in step "h" includes
a winch mounted on a said frame and a winch cable rigged to the
winch and to a said frame.
63. The method of claim 33 wherein the rigging in step "c" includes
a winch mounted on a said deck and a winch cable rigged to the
winch and to a said frame.
64. The method of claim 33 wherein the rigging in step "c" includes
a winch mounted on a said frame and a winch cable rigged to the
winch and to a said frame.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation-in-part of U.S. Ser. No. 11/610,271,
filed Dec. 13, 2006, now U.S. Pat. No. ______, which is
incorporated herein by reference.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable
REFERENCE TO A "MICROFICHE APPENDIX"
[0003] Not applicable
BACKGROUND OF THE INVENTION
[0004] 1. Field of the Invention
[0005] 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 spaced 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.
[0006] 2. General Background
[0007] 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.
TABLE-US-00001 TABLE 1 PATENT NO. TITLE ISSUE DATE 4,714,382 Method
and Apparatus for the Offshore Dec. 22, 1987 Installation of
Multi-Ton Prefabricated Deck Packages on Partially Submerged
Offshore Jacket Foundations 5,607,260 Method and Apparatus for the
Offshore Mar. 01, 1997 Installation of Multi-Ton Prefabricated Deck
Packages on Partially Submerged Offshore Jacket Foundations
5,609,441 Method and Apparatus for the Offshore Mar. 11, 1997
Installation of Multi-Ton Prefabricated Deck Packages on Partially
Submerged Offshore Jacket Foundations 5,662,434 Method and
Apparatus for the Offshore Sep. 02, 1997 Installation of Multi-Ton
Prefabricated Deck Packages on Partially Submerged Offshore Jacket
Foundations 5,800,093 Method and Apparatus for the Offshore Sep.
01, 1998 Installation of Multi-Ton Packages Such as Deck Packages,
Jackets, and Sunken Vessels 5,975,807 Method and Apparatus for the
Offshore Nov. 02, 1999 Installation of Multi-Ton Packages Such as
Deck Packages and Jackets 6,039,506 Method and Apparatus for the
Offshore Mar. 21, 2000 Installation of Multi-Ton Packages Such as
Deck Packages and Jackets 6,149,350 Method and Apparatus for the
Offshore Nov. 21, 2000 Installation of Multi-Ton Packages Such as
Deck Packages and Jackets 6,318,931 Method and Apparatus for the
Offshore Nov. 20, 2001 Installation of Multi-Ton Packages Such as
Deck Packages and Jackets 6,364,574 Method and Apparatus for the
Offshore Apr. 02, 2002 Installation of Multi-Ton Packages Such as
Deck Packages and Jackets
BRIEF SUMMARY OF THE INVENTION
[0008] 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.
[0009] A first frame or truss spans between the vessels or 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. Load spreaders
can provide an interface between each frame or truss and each
vessel (e.g. barge, ship, etc.)
[0010] The first of the frames or trusses connects to the first
hull or vessel with a universal joint and to the second hull or
vessel 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.
[0011] The catamaran hull arrangement of the present invention
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 vessels.
[0012] Each frame extends upwardly in a generally inverted u-shape
that provides space under each frame or truss and in between the
vessels or hulls for enabling a marine vessel to be positioned in
between the hulls and under the frames. The space in between the
hulls or vessels and under the frames or trusses 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.
[0013] In a plan view, each frame or truss can be generally
triangular in shape. Winches and rigging such as a block and tackle
arrangement can be used to lift objects with the apparatus of the
present invention. The frames can each be of a truss
configuration.
[0014] 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.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0015] 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:
[0016] FIG. 1 is a perspective view of the preferred embodiment of
the apparatus of the present invention;
[0017] FIG. 2 is a side, elevation view of the preferred embodiment
of the apparatus of the present invention;
[0018] FIG. 3 is an end elevation view of the preferred embodiment
of the apparatus of the present invention, with each winch and
lifting line removed for clarity;
[0019] FIG. 4 is a top plan view of the preferred embodiment of the
apparatus of the present invention;
[0020] FIG. 5 is a perspective view of the preferred embodiment of
the apparatus of the present invention;
[0021] FIGS. 6-8 are schematic illustrations of a rough sea
condition;
[0022] FIGS. 9A-9D are fragmentary views of the preferred
embodiment of the apparatus of the present invention, wherein FIG.
9B is a sectional, top view taken along lines 9B-9B of FIG. 9A,
FIG. 9C is an elevation view taken along lines 9C-9C of FIG. 9A,
and FIG. 9D is a sectional view taken along lines 9D-9D of FIG.
9C;
[0023] FIG. 10 is a perspective view of the preferred embodiment of
the apparatus of the present invention showing a block and tackle
rigging with winches and lift lines;
[0024] FIG. 11 is a fragmentary perspective view of the preferred
embodiment of the apparatus of the present invention;
[0025] FIG. 12 is an elevation view of the preferred embodiment of
the apparatus of the present invention and showing a method step of
the present invention;
[0026] FIG. 13 is a partial perspective view of the preferred
embodiment of the apparatus of the present invention and showing a
method step of the present invention;
[0027] FIG. 14 is an elevation view of the preferred embodiment of
the apparatus of the present invention and illustrating the method
of the present invention;
[0028] FIGS. 15-16 are elevation views that further illustrate the
method of the present invention;
[0029] FIG. 17 is a sectional view taken along lines 17-17 of FIG.
10;
[0030] FIG. 18 is a elevation view of a second embodiment of the
apparatus of the present invention;
[0031] FIG. 19 is a plan fragmentary view of the second embodiment
of the apparatus of the present invention;
[0032] FIG. 20 is a fragmentary, perspective view of the second
embodiment of the apparatus of the present invention;
[0033] FIG. 21 is a partial, perspective view of the second
embodiment of the apparatus of the present invention;
[0034] FIG. 22 is a partial, perspective view of the second
embodiment of the apparatus of the present invention;
[0035] FIG. 23 is a partial, perspective view of the second
embodiment of the apparatus of the present invention; and
[0036] FIG. 24 is a partial, perspective view of the second
embodiment of the apparatus of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0037] FIGS. 1-7 and 9-11 show the preferred embodiment of the
apparatus of the present invention designated generally by the
numeral 10. Marine lifting apparatus 10 provides a pair of spaced
apart vessels or hulls 11, 12, each providing a deck 30. Hulls 11,
12 can be barges, dynamically positioned vessels, or any other
buoyant structure. A pair of frames or trusses 13, 14 are provided,
each frame 13, 14 spanning between the vessels 11, 12. Each frame
13, 14 connects to one vessel 11 or 12 with a universal joint 15 or
17 (see FIGS. 1, 4, 9) and to the other hull 11 or 12 with a hinged
or pinned connection 16 or 18 (see FIGS. 4-12).
[0038] The first frame 13 connects to hull 11 with universal joint
15 (or articulating connection). The first frame 13 connects to
vessel 12 with a pinned connection or hinge 16. Similarly, the
second frame 14 connects to hull 12 with a universal joint 17 (or
articulating connection) and to hull 11 with a hinge or pinned
connection 18 (see FIG. 4).
[0039] An interface such as a deck beam or load spreader platform
19 or 20 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 or load
spreader platform 19 on its deck 30 that forms an interface between
each of the frames 13, 14 and the barge or vessel 11 deck 30. Deck
beam or load spreader platform 20 provides an interface between
each of the frames 13, 14 and deck 30 of the vessel or barge
12.
[0040] In FIG. 4, a plan or top view of the apparatus 10 of the
present invention is shown. A lifting area 21 is that area that is
in between the vessels 11, 12, the area 21 having a length defined
by dimension arrow 23 and a width defined by dimension arrow 22 in
FIG. 4. This area 21 is sized and shaped to receive a vessel having
a cargo to be lifted if that cargo (e.g. deck package) is to be
installed. Alternatively, the area 21 can be an area that receives
a vessel for supporting and transporting an item to be salvaged
from an ocean floor (see FIGS. 5 and 11-15) such as a hurricane
smashed or damaged offshore platform section 34, sunken boat 33 or
the like. In either case, a clearance is provided above the water
surface 24.
[0041] In FIG. 3, a clearance between water surface 24 and frame 13
or 14 is indicated schematically by the dimension line 25.
Similarly, a clearance 26 is provided above the maximum deck
elevation 35 of the hulls 11, 12 as shown in FIG. 3.
[0042] Each of the frames 13, 14 can be in the form of a truss as
shown. The frames are generally speaking in the shape of an arch or
inverted U so that an area is provided under the frames and above
the water surface for raising an item that is being salvaged or to
lift an item from a barge or other vessel or support that is under
the frames. Each truss or frame 13, 14 can be a one piece structure
(see FIG. 10) or a multi-section truss (see FIGS. 1-4). For
multi-section frames 13, 14 they 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 FIGS. 3 and 4.
[0043] Slings can optionally be provided for connecting the center
section 27 to the lower end portion of each of the smaller truss
sections 28, 29. Shackles can be used to attach each of the slings
to eyelets or padeyes on the center section 27. Likewise, shackles
can be used to attach the slings to eyelets or padeyes on the
smaller truss sections 28, 29.
[0044] A hook 40 or other lifting fitting can be attached to a
lifting line 41 and paid out from winch 42. More than one lifting
line 41 and hook 40 can be provided as shown. 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
such as is shown in FIG. 13. Hook 40 can be any lifting fitting
such as any known commercially available crown block, for
example.
[0045] FIGS. 6-9 illustrate the articulation that is achieved with
the method and apparatus of the present invention, even in rough
seas. In FIGS. 6 and 7, rough sea conditions are shown wherein the
vessels 11, 12 assume differing orientations relative to each other
caused by the rough sea state. Notwithstanding the orientation of
the vessels 11, 12 the combination of an articulating connection
15, 17 with hinged or pinned connections 16, 18 enables complete
articulation between each of the frames or trusses 13, 14 and each
of the vessels or hulls 11, 12.
[0046] In FIGS. 9A-9D, an exemplary articulating connection 15, 17
is shown. In FIGS. 9A-9D, a frame or truss 13, 14 connects to a
load spreader platform 19 or 20 at padeyes 61, 62. A first shaft 63
is pivotally attached to the padeyes 61, 62. A second shaft 64 is
pivotally attached to the first shaft 63 at opening 69 in first
shaft 63. The second shaft 64 also defines a pivotal connection for
the frame 13 or 14 to the first shaft 63 as shown. This universal
joint arrangement enables the frame 13 (or 14) to move in an
articulating fashion with respect to the load spreader platform 19
or 20 and with respect to the underlying vessel 11 or 12 as
indicated schematically by arrows 65, 66 in FIGS. 9A-9D.
[0047] FIGS. 10-17 show the preferred embodiment of the apparatus
of the present invention when fitted with a block and tackle
arrangement. Vessels 11, 12 are also shown fitted with anchor lines
67 that connect conventional anchors (not shown) to anchor winches
68 on the vessels 11, 12. The anchor winches 68 can be used to
exactly position vessels 11, 12 and to stabilize their positions
during a lift. A block and tackle arrangement (FIGS. 10-17) can be
used to lift an item to be salvaged from the seabed 55 such as the
damaged platform section 34 in FIG. 12.
[0048] In FIGS. 10-17, each of the frames 13, 14 is rigged with an
upper sheave 48 and upper pulley block 49. Each frame 13 or 14 can
be rigged with a lifting line 41 and one or more winches 42. In
FIGS. 10-12 for example, each frame 13, 14 has two winches 42, each
winch 42 having a lifting line or cable 41. Lower pulley block 50
is positioned below upper pulley block 49. The pulley blocks 49, 50
can provide multiple pulleys such as is shown in FIGS. 10, 13 and
17. Slings 51 can be rigged to each lower pulley block 50. Each
sling 51 can support a lifting beam or spreader bar 54. Each
spreader bar 54 can support one or more slings 53 as shown in FIGS.
12, 17. The slings 53 can be provided with any selected additional
rigging such as clamps, shackles or grabs 60, as examples. Arrows
47 in FIG. 12 show lines 41 being paid out to lower the lower
pulley blocks 50 to damaged platform section 34 (see arrow 56, FIG.
12).
[0049] The damaged platform section 34 to be salvaged can be fitted
with beams 52 such as I-beams as an example. As the damaged or
sunken platform section 34 rests upon seabed 55, grabs 60 can be
attached to the beams 52 with slings 53 as shown in FIG. 12 for a
lifting operation. Arrow 56 in FIG. 12 schematically illustrates a
lowering of the lower pulley blocks 50 to the sunken, damaged
platform section 34. After the grabs 60 are connected to the beams
52, arrow 57 in FIG. 14 schematically illustrates an elevating of
the platform section 34 as each line 41 is wound upon its winch
42.
[0050] In FIG. 15, the transport vessel 46 is moved into the area
21 under frames 13, 14. Arrow 58 schematically illustrates a
lowering of the damaged platform section 34 to the vessel 46. In
FIG. 16, grabs 60 have been released from beams 52 and lifted
upwardly in the direction of arrow 59, away from the damaged
platform section 34. The damaged or salvaged item such as a vessel
33 or damaged platform section 34 can then be transported to a
selected locale using the transport vessel or transport barge
46.
[0051] In FIG. 11, an alternate load spreader platform construction
is shown. A smaller load spreader platform 36 is placed under each
universal joint 15 or 17 of the frame 13 or 14. A larger load
spreader platform 37 is placed under each pinned connection or
hinge 16 or 18 of the frame 13 or 14. Each platform 36, 37 can
comprise a plurality of longitudinal beams 38 and a plurality of
transverse beams 39 as shown. The beams 38, 39 can be structurally
connected together (e.g. welded together).
[0052] FIGS. 18-24 show a second embodiment of the apparatus of the
present invention designated generally by the numeral 70. As with
the preferred embodiment of FIGS. 1-17, the second embodiment of
FIGS. 18-24 provides a marine lifting apparatus 70 that employs two
vessels or hulls 71, 72. The vessels or hulls 71, 72 support a pair
of frames 73, 74. Each frame 73, 74 is attached to each of the
vessels 71, 72 using a universal joint and a hinge. The frame 73
attaches to the vessel 71 using universal joint 75 and to vessel 72
using hinge 76. Similarly, the frame 74 attaches to vessels 71
using hinge 78 and to vessel 72 using universal joint 77. The
universal joint 75 of the frame 73 and the universal joint of the
frame 74 are on different vessels as shown. Each of the frames 73,
74 interfaces with the vessels 71, 72 via universal joints and
hinges and optionally with a load spreader platform interface 79,
80. FIG. 21 shows more particularly a load spreader platform
interface 79, 80 and a universal joint 75, 77.
[0053] An area 81 is provided in between each of the vessels 71, 72
as shown in FIG. 18 and under each of the frames 73, 74. In FIG.
18, dimension line 84 indicates the clearance between water surface
83 and each frame 73 or 74. The dimension line 85 indicates the
clearance above the hull deck 86 or 87 of vessel 71 or 72 as shown.
The dimension line 82 can be the width of the area 81 in between
the barges or vessels 71, 72, indicated by the dimension line in
FIG. 18 that is labeled with reference numeral 82.
[0054] A plurality of winches 88-91 are provided, two (2) winches
88, 89 or 90, 91 for each frame 73, 74. Each of the winches 88-91
provides a winch line that enables the winch to lift objects from a
seabed or from the water surface area 83 via a crown block or block
and tackle arrangement as shown in the drawings. The winch 88
provides a winch line 92. The winch 89 provides a winch line 93.
The winches 88, 89 are mounted upon frame 73 as shown in FIG. 18.
The winches 90, 91 are mounted upon the frame 74 as shown in FIG.
20. Winch 90 provides winch line 94. Winch 91 provides winch line
95.
[0055] Each frame 73, 74 is preferably in the form of a truss. In
FIG. 18, each frame 73, 74 provides a pair of spaced apart beams
96, 97 that are used to support a crown block 98 or 99 or other
lifting arrangement such a block or tackle or the like.
[0056] In the embodiment of FIGS. 18-24, there is provided for
example two winches 88, 89 or 90, 91 for each frame 73 or 74. Each
winch 88-91 is rigged to one of the beams 96, 97 using sheaves or
other rigging. Each beam 96, 97 supports a crown block 98, 99,
block and tackle or other lifting arrangement that affords
mechanical advantage when the winches 88-91 are wound in a selected
direction for either paying out or reeling in the respective winch
lines 92-95.
[0057] An example of an underwater object to be salvaged is shown
in FIG. 20 in the form of a platform 107. In FIG. 20, a plurality
of crown blocks 98, 99 attach to a lifting frame or frames or
spreaders 100. Each of the lifting frames or spreaders 100 is used
to lift deck 107 using a plurality of hooks 101 and slings 102,
103. Each of the slings 102 is a sling that extends in between a
lifting frame 100 and a hook 101.
[0058] With the method of the present invention, openings 104 can
be cut in deck 105 of platform 107. In this fashion, slings 103 can
extend downwardly from hooks 101 to underdeck beams 106 that are
shown in phantom lines in FIG. 22.
[0059] In order to ensure that the hooks 101 do not fall through
the openings 104, each hook 101 is provided with a base structure
108 that can be fabricated of a plurality of plates 109 that are
welded together and shafts 110 spanning between adjacent plates
109. Shafts 110 are receptive of the loops 111 of the slings 103 as
shown in FIGS. 22-23. Examples of hook and base structure
arrangements are seen in FIGS. 22 and 23. In FIG. 24, a base
structure 112 employs a plurality of links 113 that extend through
an opening 104 (e.g. cut opening) in deck 105 and wherein a pinned
connection 114 extends through the links 113 and beneath an
underdeck beam 106 as shown. Hook 101 of FIG. 24 can attach via
pinned connections 115, 116 and plates 109 to the links 113.
[0060] The following is a list of parts and materials suitable for
use in the present invention.
[0061] Parts List
TABLE-US-00002 Part Number Description 10 marine lifting apparatus
11 vessel 12 vessel 13 first frame or truss 14 second frame or
truss 15 universal joint 16 hinge 17 universal joint 18 hinge 19
load spreader platform interface 20 load spreader platform
interface 21 area 22 dimension line 23 dimension line 24 water
surface 25 clearance above water 26 clearance above hull deck 27
center truss section 28 smaller truss section 29 smaller truss
section 30 hull deck 31 pinned connection 32 pinned connection 33
sunken vessel 34 damaged platform section 35 maximum deck elevation
36 load spreader platform 37 load spreader platform 38 longitudinal
beam 39 transverse beam 40 lifting hook 41 lifting line 42 winch 43
sheave 44 sheave 45 sheave 46 transport vessel 47 arrow 48 upper
sheave 49 upper pulley block 50 lower pulley block 51 sling 52 beam
53 sling 54 spreader bar 55 seabed 56 arrow 57 arrow 58 arrow 59
arrow 60 grab 61 padeye 62 padeye 63 first shaft 64 second shaft 65
arrow 66 arrow 67 anchor line 68 anchor winch 69 opening 70 marine
lifting apparatus 71 vessel 72 vessel 73 frame 74 frame 75
universal joint 76 hinge 77 universal joint 78 hinge 79 load
spreader platform interface 80 load spreader platform interface 81
area 82 dimension line 83 water surface area 84 clearance above
water 85 clearance above hull deck 86 hull deck 87 hull deck 88
winch 89 winch 90 winch 91 winch 92 winch line 93 winch line 94
winch line 95 winch line 96 beam 97 beam 98 crown block 99 crown
block 100 frame/spreader 101 hook 102 sling 103 sling 104 opening
105 deck 106 underdeck beam 107 platform 108 base structure 109
plates 110 shaft 111 loop 112 base structure 113 link 114 pinned
connection 115 pinned connection 116 pinned connection
[0062] 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.
[0063] 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.
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