US3093972A

US3093972A - Portable marine platform

Info

Publication number: US3093972A
Application number: US173086A
Authority: US
Inventors: Jr Moutague R Ward
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-02-01
Filing date: 1962-02-01
Publication date: 1963-06-18
Anticipated expiration: 1980-06-18

Description

June 18, 1963 M. R. WARD, JR 3,093,972

PORTABLE MARINE PLATFORM Filed Feb. 1, 1962 5 sheets-sheet 1 Il rmel/5y June 18, 1963 M. R. WARD, JR 3,093,972

PORTABLE MARINE PLATFORM Filed Feb. 1, 1962 5 sheets-sheet 2 .J6 E mf ,2 "o4 J` J4 2a jin; 6

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June 18, 1963 M. R. WARD, JR 3,093,972

PORTABLE MARINE PLATFORM Filed Feb. l, 1962 5 Sheets-Sheet 3 INV EN TOR.

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United States Patent fl- 3,093,972 PORTABLE MARINE PLATFORM Montague R. Ward, Jr., 5500 Oleta St., Long Beach 15, Calif. Filed Feb. 1, 1962, Ser. No. 173,086 4 Claims. (Cl. 61-46.5)

The present invention relates generally to the iield of marine structures,l Iand more particularly to `a tubular pontoon-supported frame that can be towed to a desired off-shore location and then submerged to support a barge or other platform-defining means at a sufficient elevation above the water surface to be free from the buffeting action of waves.

A major object lof lthe invent-ion is to provide portable and interchangeable structures for installation in deep water that are adapted yfor both easy installation and removal, yet when so installed, are capable' of withstanding severe forces of wind, waves, currents, earthquakes, storms, and the like.

Another object of theinvention is to provide a stable, deep Water marine platform of such strength, size and rigidity as to be adapted for use in oil well drilling, radar stations or the like.

Yet another object -of the invention is to vprovide a pontoon-supported frame that is first submerged at the desired off-shore location whereby a barge or other platform-defining means maybe floated above the submerged frame and subsequently raised by the use of the frame to the desired elevation above the water surface.

A still further object of the invention is to provide a pontoon-supported tubular fra-me that is relatively light in weight, less expensive to construct than competitive marine platforms now in use for oil well drilling and producing operations, and one that can be utilized for the support of platforms of varying Hoor area.

Yet still another object of the invention is to provide a portable unit that can be submerged or raised in ya relatively short time, may be moved from location to location in the drilling of wells, and one that may be disposed in a stable position on a sloping bot-torn, or on a shifting bottorn such as qucksand which provides uneven settlement for the'pontoon" supports.

A further object of the invention is to supply a unit of such design that a minimum of structural members are exposed to the effects of wind andwater, and one that is -safe to handle both in making the original installation as well as when it is moved from one location to another.

These and other objects and advantages of the invention will become apparent from the following description of a preferred form thereof when taken in conjunction with the drawings-illustrating that form, in which:

FIGURE 1 is al side elevational View of the submerged invention shown supporting a barge on which an oil well derrick is mounted at an elevated position above the Water surface;

FIGURE 2 is an end elevational v-iew of the invent-ion as shown in FIGURE 1; Y

FIGURE 3 is a side elevational view of the submerged invention shown resting on `a sloping bottom;

FIGURE 4 is a top plan view of the invention;

FIGURE 5 is a perspective view of the invention;

FIGURE 6 is a side elevational view of the invention shown being towed to the desired offshore location;

FIGURE 7 is a side elevational view of the invention shown with vent and-lill liner connected thereto;

FIGURE 8 is a side elevational view of the invention partially submerged;

FIGURE 9 is a side elevational view o-f the invention in a submerged position shown supporting a platform at an elevated position above the water surface;

3,093,972 Patented June 18, 1963 ice FIGURE 10 is a fragmentary side elevational View of one of the upper corner portions of the invention;

FIGURE 11 is a fragmentary horizontal cross-sectional View of a corner portion of the invention taken on line 11-11 of FIGURE l0;

FIGURE l2 is a fragmentary side elevational View of the central por-tion of the invention;

FIGURE 13 is a fragmentary horizontal cross-sectional view of the invention taken on line 13;-13 of FIGURE 2;

FIGURE 14 is a fragmentary vertical cross-sectional view taken on line 14-14 of FIGURE 1 showing one of the lower end portions of the piles that support the platform above the Water surface;

FIGURE l5 is a fragmentary vertical cross-sectional View taken on lline 15--15 of FIGURE l showing one of the lower e'nd portions of one of the corner columns of the invention;

FIGURE 16 is a bottom plan view of one of the corner columns of the invention taken on line 16-16y of FIG- URE V15;

FIGURE 17 is a vertical cross-sectional View of a typical tubular member utilized with the invention showing the liquid fill line and air vent associated therewith; and

FIGURE 18 is a diagrammatic view of an alternate form of the invention.

Referring now to FIGURES 1, 2, 4 and 5 for the general :arrangement of the invention it will be seen to include a generally cubic framework A fabricated from tubular members and which rests on pontoons B. By means of a number of vertically positionable piles C Vframework A supports platform-defining means D Iat a suilicient elevation above the surface o-f the water E as to be immune from the buffeting action of Waves. Platform-defining means D is preferably a `barge having a large enough floor area to permit the erection of an oil well derrick thereon, as Well as the storage of accessories required in the drilling or producing of an oil well.

In use, the pontoon-supported framework A is towed by a suitable boat F to the desired off-shore location. Situated -at this location is a float G, which by pump means (not shown) is adapted to pump water through a hose H connected to the central portion of the tubular framework A. Framework A, by valves J `forming a part thereof, is divided into sections K, any one of which sections may be flooded with Water 4to stabilize the invention, as Well as to reduce its buoyancy Iand cause it to submerge at the desired location. In addition, a oat L is provided from which a second hoseY M extends to the framework A, through which hose air is vented as the framework sections K are flooded with water.

FIGURES 6 to 8 inclusive graphically illustrate the'l steps required in-towing the framework A to the desired off-shore location and submerging it until the pontoons B rest on the ocean oor. After the framework A is so submerged, the piles C in combination with elevating means O that will be described in detail hereinafter, are employed to raise the platform-defining means D to the position shown in FIGURE 9. Framework A is so constructed that it may be angularly positioned when submerged (FIGURE 3), and yet be used to raise and support the platform-dening means in a horizontal position.

In detail, the framework A is illustrated as including four vertical tubular columns P, Q, R and S that define the four corners thereof and which are reinforced by identical tubular diagonals U and V that extend from opposing tops and bottoms of the corner columns to intersect at junctions 10 as shown in FIGURE 5. In addition, each of the columns is connected at the upper ends thereof by upper tubular cross pieces W and at the center portions by lower tubular cross pieces X. The upper ends of columns P, R and Q, S are connected by horizontal diagonally disposed tubular members Y and Z respectively (FIGURE Although four vertical columns P, Q, R and S are shown -as defining the corners of framework A, it will be apparent that a suitable three dimensional framework can be fabricated from but three corner columns should it be desired.

The tubular reinforcing on each side of the framework A are identical, and only will be described in detail herein. Two

tubular members

12 and 14 extend upwardly from the ends of the lower cross piece X to meet at an apex 16 at substantially the center of the upper cross

piece W. Members

12 and 14, as can best be seen in FIGURE 5, intersect the diagonals U and V at

junction points

18 and 20, respectively. Two vertical

tubular members

22 and 24 lead upwardly from junction points 18 `and 20, respectively, to be rigidly connected to the upper cross piece W. Two downwardly and inwardly extending

tubular members

26 and 28 project from the ends of the lower cross piece X and intersect diagonals U and V at

junctions

30 and 32, respectively. A horizontal tubular reinforcing member 34 connects diagonals U and V and extends between

junction points

30 and 32. Two horizontal

tubular members

36 and 38 extend inwardly from the upper corner portions of member W adjacent columns P and R to intersect the diagonal Y at junction point 40. Similar horizontal

tubular members

42 and 44 extend inwardly from member W adjacent columns Q and S to intersect the diagonal Z at junction 46, as may best be seen in FIGURE 4. Two horizontal tubular members 48 are provided that are parallel to diagonal Z and extend from the center portion of member W through the junction point 40. Similar horizontal tubular members 50 also extend between the center portion of member W and pass through junction point 46. Two tubular reinforcing members 54 and 56 extend between the opposing junctions 10, as shown in FIGURE 5, and intersect at their centers at a junction point 58. Four downwardly and inwardly inclined members 68 are provided that project from the upper end portions of columns P, Q, R and S and intersect at the junction point 58. Upper cross pieces W are reinforced by a number of rigid members 61 that extend between same directly above the .apex portions 16. Similar reinforcing members 63 extend between the lower cross pieces X and are joined to same at junction points 10.

All of the above-described tubular members are joined to define sections K which can be closed off from one another by means of valve I to permit any one of the sections to be flooded by water as desired, or to permit displacement of the water therefrom by application of air under pressure. The flooding or removal of water from sections K is of the utmost importance, for it permits the stable positioning of the framework A on the pontoons B, particularly when the framework is angularly disposed as shown in FIGURE 3.

Columns P, Q, R and S are all of identical construction, and the detailed structure of one of the columns (P) is shown in FIGURES and ll. Structurally column P is representative of the balance of the columns and is formed from four heavy

tubular members

64, 66, 68 and 70 that are disposed in spaced parallel relationship, with the upper ends thereof being closed by a plate 72 that is welded or otherwise aiixed thereto. Upper member W is formed from four spaced horizontal

tubular members

72, 74, 76 and 78. A heavy plate 80 is welded to the exterior surface of

tuoular members

66 and 70, and the ends of

tubular members

72, 74, 76 and 78 `are welded or otherwise rigidly afxed to the exterior surface of this plate as shown in FIGURE l1. Two vertically separated, horizontally disposed

plates

84 and 86 are provided in which openings are formed through which

tubular members

64, 66, 68 and 70 extend and that are welded thereto to `add rigidity to the framework. Two Vertical reinforcing plates `88 and 90 are provided which are welded or otherwise affixed to the diagonals U (FIGURE l1). A heavy, rigid reinforcing plate 92 is aixed to

plates

84 and 86, and bisects the angle between

plates

88 and 90 to engage one of the downwardly and inwardly extending members `60 to which it is also welded or otherwise affixed.

The center portion of column P is reinforced by two vertically spaced, horizontally disposed

plates

100 and 102 that are welded to

tubular members

64, 66, 68 and 70, and in yaddition a gusset plate 104 extends from plates 100 `and 102 yto

tubular members

12 and 26 and the lower cross piece X, as shown in FIGURE l2. Heavy plates 106 are welded or otherwise affixed to the lower ends of

tubular members

64, 66, 68 and 70 compnising columns P, Q, R and S to prevent entry of water `thereinto, and a bore 108 is formed in plate 106 that loosely engages a heavy bolt 110 which extends upwardly from an elongate member 112 of semi-circular cross section, the free ends of which are axed to the deck portion 114 of one of the pontoons B. Two

elongate members

116 and 118 of identical construction are disposed in parallel relationship on the under side of platte 106 and welded thereto, with the exterior surface of the two

members

116 and 118 resting on the exterior surface of member 112 and being able to move relative thereto. Displacement of the plate 106 from bolt 110 is prevented by a nut 118 that is securely aixed to the bolt. This construction permits columns P, Q, R and S to move relative to pontoons B in the event settlement of the pontoons occurs when resting on the ocean floor, without stresses being applied to the bottom portions of the columns. Members W, as may best be seen in FIG- URE 5, cooperate with columns P, Q, R and S,

members

22 and 24, and Ithe apex 16, to support a number of piles 126 of identical construction (FIGURES 1-3 and 9) that support the platform-dening means D.

Each of the piles 126 is of tubular construction and terminates on its lower end in a rigid member 128 having a convex exterior surface. A pin 130 extends downwardly from the member or plate 128.

Tubular members

72 and 74 forming a part of each of ythe upper cross pieces W are, at the desired intervals, provided with a heavy plate 132 from which flanges 134 and 136 project upwardly that support a member 138 therebetween and on the upper concave surface of which the convex exterior surface of member 128 rests. Member 138 has a bore formed in the center thereof from which a tubular member 140 extends downwardly and in which tubular member the pin 130 is loosely disposed.

Each of the pins 130 is suticiently smaller in transverse cross section than the linterior transverse cross section of the tubular member 140 in which it is disposed that .the pile 126 of which it forms a part can pivot or move angularly relative to the framework A as rigid convex member 128 rocks on member 138. Thus, the pins 136 serve to removably connect the piles C to fthe framework A for pivotal or angular movement relative thereto.

Piles C, as may best be seen in FIGURES 1, 2, 3 and 14, are adapted to be lowered for the pins 136 thereof to removably engage the framework A irrespective of whether the framework is vertically disposed on the bottom or angularly disposed. Thus, the piles C when in engagement with framework A cam assume vertical positions as shown in FIGURE 14, even though the framework A is angularly disposed as shown in FIGURE 3.

After the framework A has been submerged to the position shown in FIGURES 1, 2, 3 and 9, the platformdefining means D Iis moved directly over the frame and the piles C are lowered to engage the frame in the manner previously described, with the piles also cooperating with jacks or other raising means `associated with the barge to raise same upwardly from the position shown in phantom line in FIGURE 9 to that shown in solid line.

On each of the columns P, Q, R and S the framework A is equipped with a vertically movable stabilizing pontoon 150. When the framework A is towed to an olfshore location, the pontoons 150 are disposed on the upper surface of the pontoons B. By means of :cables or other guide means, pontoons 150 are at all times maintained in close contact with the column P, Q, R or S with which the pontoons are associated, but with each pontoon boing vertically movable relative to framework A. Thus, -as pontoons B are flooded and framework A starts to submerge, by means of cables 152 the stabilizing pontoons are held at the water surface and the framework is permitted to move downwardly relative thereto. In this manner any sidewise movement of framework A as it sinks is substantially eliminated, particularly when it is considered that water is 'admitted through hose lI-I into the central portion of the framework l(FIGURE 17), to lill the lower sections K thereof.

Tubular members

64, 66, 68 and 70 comprising column Q have fill line 156 extending into the confines thereof, which fill line is connected to a branch of hose H. A slot 158 is formed in line 156 within the confines of `the .tubular member 66, and water is discharged through ythe slot 158 onto `a perforated baffle 160 rthat disperses water into a number of individual streams whereby the impact of the solid stream of water is avoided and the interior surface of tubular member 66 is not subjected to any extensive abrasive action therefrom. As each of the tubular members 66 fills with water, air contained in the member is displaced therefrom through a vent .tube 162 .that is connected to a branch of hose M extending back .to the vent float L. By use of valving I on framework A, any one or all lof the sections K can be filled with fluid to reduce the buoyancy of the framework until it :sinks @to the ocean floor.

The pontoons B are hollow rectangular bodies of conventional design and sufficiently heavy in construction to withstand the high pressures to which they are subjected when disposed .several hundred feet under water. Each of the pontoons is preferably provided with a relief valve 164 :to prevent the possibility of a dangerously high pressure building up within the coniines thereof. Each of the pontoons B preferably has a number of pipes 166 extending therethrough that are adapted to receive piles 16S after the pontoons have been positioned on the ocean floor. Piles 168 prevent lateral movement of the framework A as well as undue stressing of fthe framework due to sidewise movement thereof caused by ocean currents or the like.

After the framework A has been disposed on the bottom of the ocean and it is desired to raise same, 4the vent 162` and hose M are utilized to pump air into the conues of the framework, with water being displaced therefrom through the fill line 156 and the hose M, coupled with the buoyancy of the framework and that Aof the pontoons, being sufficient to raise the frame to the position shown in FIGURE 6. Of course, previous to raising the framework, the platform-defining means D is lowered by the use of jacks to the ocean surface andthe piles C then raised upwardly relative to the platform or barge to separate them from the framework A, and the barge and piles then moved to a position apart from the framework.

The framework A may then be raised to the ocean surface (FIGURE/6) and the platform-defining means D and framework A transferred to another location where the framework is lowered by the iiooding operation previously described and the piles C placed in engagement therewith whereby the platform-defining means may be raised to `the position shown in FIGURES 1 and 2 by the use of jacks or other raising equipment. The operation previously described is then repeated, with the platform being used for supporting one or more oil well derricks for use in drilling or producing.

It will be particularly noted that the platform-defining means D is raised to a sufliciently high elevation above the water surface so that lthe maximum wave 172l thatV does not actually contact the `barge or platform. Due to the construction of the invention and the elevation at which the platform is supported above the surface of the water, the only wave action is against the piles C, with the barge being immune to the wave action because of its elevation, and the frame A likewise is immune from any extensive wave action due to the depth of the upper portion thereof below` the surface of the sea. n

In the event it is not desired to use valves J on framework A, the framework can `be permanently divided into sections K by sealing the converging tubular members from one another, such as at the junction points 10 and apex portions 16. When the framework A is permanently subdivided into section K, each section is provided with a iill line 156 and air vent 162, and a number of hoses H and M extend to the floats G and L where they are connected to valving K' to permit the sections to be flooded or evacuated of fluid.

In FIGURES l and 2 it will be seen that a number of cables or chains extend upwardly from the pontoons B to the corner columns P, Q, R and S, as well as between the pontoons, which cables or chains limit the heel of the flooded pontoons when submerged, to prevent them from fouling other parts of the apparatus or overloading thereof. Reinforcement of the piles 126 as shown in FIGURE 9 is easily accomplished by the use of diagonally disposed rigid members 127.

vAn alternate form of the invention is shown in FIGURE 18 in which the framework F is provided with a centrally disposed pivot 186` on which a second framework F is mounted. This second framework F includes tension mem-bers 18S which hold the two frameworks in fixed relationship during the time they are being moved to the desired off-shore location. After frameworks F and F are submerged, the `tension members 188 are loosened relav tive the second framework F', which permits framework F' to be vertically disposed irrespective of whether framework F is vertically or angularly disposed when resting on the bottom of the sea.

Although the form of the invention herein shown and described is fully capabler of achieving .the objects and providing the advantages as herein set forth, it is to be understood that it is merely illustrative of the presently preferred embodiments thereof and that I do not mean to limit myself to the details of construction described and shown other than as defined in the appended claims.

I claim:

1. A structure for providing a working area over a body of water, comprising:

(a) -a framework having a plurality of spaced downiwardly extending bores formed in the upper extremity thereof;

(b) a plurality of hollow pontoons affixed to the lower portion of said framework, which 'pontoons have sufficient buoyancy to oat said framework at a desired location in said body of water;

(c) means to admit water into said pontoons for lessening the buoyancy thereof to cause said framework .and pontoons to concurrently move downwardly in said body of water until said pontoons rest on the bottom thereof;

(d) a buoy-aut platform that defines said working area and is capable of lbeing floated to said desired location;

(e) a plurality of vertically disposed piles vertically and adjustably supported from said platform;

(f) aplurality of pins. projecting downwardly from said piles that removably engage said bores, which pins are smaller in transverse cross section than Vthat of said bores to permit angular positioning of said framework relative to said piles; and

(g) means to raise said platform upwardly on said piles when said pins are in said bores to a position sufficiently high above the surface of said body of water as to not be buffeted by waves formed thereon.

2. A structure as defined in claim l in which a plurality of concave surfaces are defined in said framework around lessen the buoyancy of said framework and cause it to said bores, and said piles are formed with lower convex move in a desired direction. surfaces that rest on said concave surfaces when said pins References Cited in the me of this patent engage said bores.

3. A structure as dened in claim 1 in which said frame- 5 UNITED STATES PATENTS work is of closed tubular construction to augment the 215741140 Boschen NOV' 6' 1951 buoyancy of Said pontoons. 2,612,025 Hunsucker a Sept. 30, 1952 4. A structure as defined in claim 1 in which said frame- 2907172 Ciak@ Oct 6 1959 work is divided into `a plurality of separate sections, with OTHER REFERENCES each of said sections being capable of separate flooding to 10 Engineering Newsqecord, October 25, 1956, pp 40 44

Claims

1. A STRUCTURE FOR PROVIDING A WORKING AREA OVER A BODY OF WATER, COMPRISING: (A) A FRAMEWORK HAVING A PLURALITY OF SPACED DOWNWARDLY EXTENDING BORES FORMED IN THE UPPER EXTREMITY THEREOF; (B) A PLURALITY OF HOLLOW PONTOONS AFFIXED TO THE LOWER PORTION OF SAID FRAMEWORK, WHICH PONTOONS HAVE SUFFICIENT BUOYANCY TO FLOAT SAID FRAMEWORK AT A DESIRED LOCATION IN SAID BODY OF WATER; (C) MEANS TO ADMIT WATER INTO SAID PONTOONS FOR LESSENING THE BUOYANCY THEREOF TO CAUSE SAID FRAMEWORK AND PONTOONS TO CONCURRENTLY MOVE DOWNWARDLY IN SAID BODY OF WATER UNTIL SAID PONTOONS REST ON THE BOTTOM THEREOF; (D) A BUOYANT PLATFORM THAT DEFINES SAID WORKING AREA AND IS CAPABLE OF BEING FLOATED TO SAID DESIRED LOCATION; (E) A PLURALITY OF VERTICALLY DISPOSED PILES VERTICALLY AND ADJUSTABLY SUPPORTED FROM SAID PLATFORM; (F) A PLURALITY OF PINS PROJECTING DOWNWARDLY FROM SAID PILES THAT REMOVABLY ENGAGE SAID BORES, WHICH PINS ARE SMALLER IN TRANSVERSE CROSS SECTION THAN THAT OF SAID BORES TO PERMIT ANGULAR POSITIONING OF SAID FRAMEWORK RELATIVE TO SAID PILES; AND (G) MEANS TO RAISE SAID PLATFORM UPWARDLY ON SAID PILES WHEN SAID PINS ARE IN SAID BORES TO A POSITION SUFFICIENTLY HIGH ABOVE THE SURFACE OF SAID BODY OF WATER AS TO NOT BE BUFFETED BY WAVES FORMED THEREON.