Patent Description:
This invention relates generally to the flowable material delivery field, and more specifically to a new and useful system and method of delivering flowable materials via waterborne facilities and watercrafts.

Conventionally, concrete is transported from a batching plant to a pour site using vehicle-mounted transit mixers. However, many shoreline or off-shore pour sites are difficult to access by standard truck delivery. Conventional solutions that seek to resolve this issue, particularly those that seek to manufacture concrete off-shore for on-shore use, suffer from long-range transportation problems. As these job sites typically lack docks, any production plant must be located a given distance off-shore. However, transportation of concrete across this distance requires time, during which the concrete cures and reduces in workability. Furthermore, conventional transport methods, such as use of crane-operated buckets, typically expose the concrete to uncontrolled amounts of air or seawater during transit, which can result in uncontrolled concrete property changes.

<CIT> discloses a method and a system in accordance with the preamble of claims <NUM> and <NUM> respectively, and describes a front-end apparatus used in a grouting system. The front-end apparatus includes an injection tube. The injection tube is connected to an injection hose for supplying an injection material and is formed to rotate and form a flow passage of the injection material delivered through the injection hose. The injection tube is coupled to the injection hose and the injection pipe member, respectively, to inject the injection hose into the injection hose.

<CIT> discloses a concrete plant ship that has a plant housing provided on the deck of a barge, a swivel base outfitted to freely turn about a vertical axis on the deck, a boom with one end luffedly fitted to the swivel base, a drain pipe supported by the boom5, and a derricking drive to luff the boom. The derricking device is equipped with a winch, a pulley supported on the upper part of the plant housing, and a wiring means which is unwound from the winch and is connected to the boom through the pulley that winds and passes the means.

<CIT> discloses an abrasion-resistant airtight hose being suitable for transport of ready mixed concrete, earth and sand, powder, etc., by a method wherein a sheet layer of polyethylene having a specified molecular weight is provided integrally inside either inner rubber or outer rubber.

<CIT> discloses methods for laying a waterproofing layer which may be used for forming the bottom and the walls of depositing sites so as to comply, both in literal and in substantial terms, with the legal requirements. The methods are intened to provide durable waterproof barriers which have a high mechanical strength, without discontinuity.

Furthermore, component durability and storage drawbacks preclude the concrete from being pumped to the shore. Flexible pipes and hoses, such as those made from rubber, cannot support the pressures required to move the product such a long range. Furthermore, the coarse granular composition of the concrete reduces durability and lifetime of these pipes and hoses. The granular concrete composition also reduces the lifetime of most pumps capable of providing pressures sufficient to move the concrete the desired distance. Rigid piping solutions are non-ideal for off-shore production plants, as off-shore production plants are typically limited in storage space.

Furthermore, conventional concrete production and delivery is costly due to the multiple transportation steps that are required before the concrete arrives at the job site. Constituent materials of the concrete, such as aggregate, cement, and admixture, are typically shipped in on supply vessels or via railway, off-loaded onto trucks at the shoreline, transported to an inland production plant, mixed, and transported back to the shoreline via truck. These steps increase the cost of production, increase the lead time between supply vessel arrival at the shoreline and concrete delivery to the shoreline job site, and generate massive amounts of transportation waste products.

Thus, there is a need in the concrete manufacturing and delivery field to create a new and useful concrete production and delivery system. The present disclosure addresses these and other needs of the prior art.

In aspects, the present disclosure provides a method of delivering a ready-mix concrete to a target location that is proximate a pour site as set out in the appended independent claim. Preferred embodiments are contained in the dependent claims. The method includes the step of positioning a waterborne facility on a body of water. The waterborne facility includes a spoolable pipe wound on a spool. The method further includes guiding an outlet end of the spoolable pipe from the waterborne facility to a target location proximate to the pour site, preparing the ready-mix concrete at the waterborne facility using a mixing volume, and conveying the ready-mix concrete to the target location via the spoolable pipe.

The method also includes positioning a pump and a mixing volume on the waterborne facility. The spoolable pipe is formed primarily of a non-metal and includes a plurality of bonded layers, wherein the spoolable pipe runs generally parallel to the water's surface, being totally submersed, partially submersed or fully floating in the body of water by flotation devices included along its length or along given sections. The pump is configured to pump the ready-mix from the mixing volume to the spoolable pipe. The spoolable pipe may include a composite tape layer.

The ready-mix concrete may be formed using a plurality of components at least one of which is one of: (i) sand, (ii) gravel, (iii) crushed stone, and (iv) cement. Also, the ready-mix concrete may be formed using at least an aggregate and cement. The aggregate may make up at least <NUM>% of a total volume of the ready-mix concrete. In aspects, the volume of aggregate may be <NUM>-<NUM>% of the total volume.

The method may include transporting the component(s) to the waterborne facility using a watercraft. Also, the waterborne facility may include a transporter. In such variants, the method may include docking the watercraft carrying the component(s) at a side of the waterborne facility, rotating the transporter toward the side of the waterborne facility, and positioning an inlet of the transporter in contact with the component(s).

In variants, the waterborne facility may not be attached to a submerged land mass. By submerged land mass, it is meant the ocean floor, sea bed, or other surface defining the boundary between the body of water and the earth below. In such variants, the method may include dynamically positioning the waterborne facility using a propulsion system associated with the waterborne facility while conveying the ready-mix concrete to the target location via the spoolable pipe.

In variants, the method may also include displacing the spoolable pipe by one of: (i) pulling the outlet end of the pipe, and (ii) rotating the spool on which the spoolable pipe is wound.

In another aspect, the present disclosure provides a system for delivering a ready-mix concrete to a target location that is proximate a pour site as set out in the appended independent claim. Preferred embodiments are contained in the dependent claims. The system includes a waterborne facility positioned in a body of water, a ready-mix concrete preparation system comprising a pump and a mixing volume located on the waterborne facility, the ready-mix concrete preparation system being configured to form ready-mix concrete using at least an aggregate and a cement; and a spoolable pipe wound on a spool on the waterborne facility and connected to the ready-mix concrete preparation system, the spoolable pipe (<NUM>) being formed primarily of a non-metal and including a plurality of bonded layers, wherein the spoolable pipe runs generally parallel to the water's surface, being totally submersed, partially submersed or fully floating in the body of water by flotation devices included along its length or along given sections, the spoolable pipe (<NUM>) being configured to extend to the target location.

The pump is in fluid communication with the mixing volume. The pump pumps the ready-mix from the mixing volume into the spoolable pipe.

Also, the system may include one or more transporters conveying at least one component of the ready-mix into the mixing volume. The transporter(s) may receive the component(s) a storage tank on the waterborne facility and/or an adjacent watercraft. The transporter may be configured to convey at least one component of the plurality of components into the mixing volume and the transporter may be selected from an enclosed auger, a conveyor, and/or a substantially fluidly isolated transporter. In embodiments, the waterborne facility may be a self-powered watercraft, a towed watercraft, a floating offshore platform, and an offshore platform supported by a seabed.

It should be understood that examples of certain features of the disclosure have been summarized rather broadly in order that detailed description thereof that follows may be better understood, and in order that the contributions to the art may be appreciated. There are, of course, additional features of the disclosure that will be described hereinafter and which will form the subject of the claims appended hereto.

The advantages and further aspects of the disclosure will be readily appreciated by those of ordinary skill in the art as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference characters designate like or similar elements throughout the several figures of the drawing and wherein:.

The following description of the described embodiments of the invention is not intended to limit the invention to these described embodiments, but rather to enable any person skilled in the art to make and use this invention. For brevity and preciseness, the following description uses the certain technical terms. A watercraft refers to any marine vessel that is engineered and constructed to propel itself along a body of water, marine vessel that is engineered to float but does not have onboard equipment for self-propulsion (i.e., an unpowered watercraft), or any marine vessel engineered to be towed or otherwise moved along a body of water. A waterborne facility refers to any watercraft or floating platform that is engineered and constructed to accommodate heavy equipment such as pumps, hydraulically powered spools, conveyance mechanisms and/or structures such as bins or containers. The term "near coastal" refers to a region or zone extending inland from a shoreline. Depending on the geography and terrain, a near coastal location can be a few miles or a dozen miles or more from the shoreline.

As shown in <FIG>, the off-shore preparation system <NUM> includes a mixing volume <NUM>, reagent storage <NUM>, a displacement mechanism <NUM>, a material transfer mechanism <NUM>, and a vessel <NUM> supporting the mixing volume. This system functions to prepare and deliver ready-mix concrete. This system may be used to provide ready-mix concrete for shoreline and off-shore developments. The system may be used within a mile of the development site, but can alternatively provide ready-mix concrete to the development site from any suitable distance.

As discovered by the inventor, this system confers several advantages over conventional systems. First, by arranging the preparation system on a watercraft, this system is able to reach locations otherwise inaccessible to wheeled vehicle transport. Second, this system resolves long-range transportation issues, such as product curing, by utilizing high pressures to move the product from the vessel to the desired site, by maintaining a substantially closed system (e.g., a system that is substantially fluidly isolated from seawater and air), and by adding admixtures that can extend the product curing time. Third, this system resolves the durability and component storage issues experienced by conventional concrete piping systems by utilizing a flexible composite bonded pipe that can be wound in a spool for storage on-board with the ability to sustain high pressures. Fourth, by enabling supply vessels to directly couple to and supply the system with raw materials, this system reduces the number of transportation steps required to produce and deliver the product. In doing so, this system not only reduces waste product emissions, but reduces the operational cost of delivering the product as well.

In one example of a method of system operation as shown in <FIG>, the method includes coupling an auxiliary vessel <NUM> holding a solid reagent <NUM> to the vessel <NUM> (<FIG>), feeding the solid reagent <NUM> from the auxiliary vessel <NUM> into the product volume <NUM>, feeding stored reagents from the reagent storage <NUM> to the product volume <NUM> (<FIG>), mixing the reagents within the product volume <NUM>, moving the resultant product through a deployed material transfer mechanism <NUM> (e.g., pipe) with the displacement mechanism <NUM> (e.g., high pressure pump), and decoupling the auxiliary vessel <NUM> when the solid reagent supply on the auxiliary vessel is exhausted. The auxiliary vessel <NUM> may be coupled to the vessel <NUM> or retained proximal the vessel by mooring lines, dynamic positioning systems, by conventional propulsion systems, or by any other suitable coupling mechanism <NUM>. The solid reagent <NUM> is drawn into the product volume <NUM> by a material transporter <NUM>, such as an enclosed auger and conveyor or other substantially fluidly isolated transporter, but can be otherwise moved into the product volume. The stored reagents are pumped from reagent storage <NUM> into the product volume <NUM>. When a component of the product is water, the water can be pumped into the product volume <NUM> from reagent storage <NUM> or from the surrounding water source (e.g., sea). The auxiliary vessel <NUM> may be detached from the vessel <NUM> and exchanged for a second auxiliary vessel holding a volume of the solid reagent when the solid reagent supply <NUM> of the first auxiliary vessel <NUM> is exhausted. The auxiliary vessel <NUM> may be a part of a fleet of vessels that are used to continuously or periodically supply reagents such as aggregate and cement. The stored reagents <NUM> can be refilled from land or directly from supply vessels when reagent volume held by the reagent storage <NUM> is exhausted. However, the system can be otherwise operated.

As shown in <FIG>, the vessel <NUM> of the system functions to support the mixing volume <NUM>, reagent storage <NUM>, displacement mechanism <NUM>, and material transfer mechanism <NUM>. The vessel <NUM> includes a hull <NUM> supporting a deck <NUM> configured to be elevated above water level, a propulsion system <NUM> that moves the vessel <NUM>, one or more generators or power sources that powers the propulsion system <NUM> and/or the system components, and a control system that controls vessel operation and/or product production.

Vessel propulsion may be automatically controlled by the control system, but can alternatively be manually controlled or semi-automatically controlled based on a user input. The vessel <NUM> can additionally include a dynamic positioning system (e.g., sensors and programming) connected to the propulsion system that is capable of substantially maintaining the geographical position of the vessel <NUM>. In that mode of operation, the vessel <NUM> is not attached to a submerged land mass or attached to a shore-based structure. The vessel <NUM> may also use conventional propulsion systems to maintain station. In other modes of operation, the vessel can include anchors, mooring lines, or any other suitable position retention mechanism. The vessel <NUM> can be a ship (e.g., a cargo ship), a barge or other self propelled vessel (e.g., a platform supply vessel), a raft, a tanker, or be any other suitable watercraft. The vessel <NUM> may be operable between a production mode and an underway mode. The vessel position (e.g., geographic location) may be substantially stationary in the production mode, and the power source provides power to the production system. The vessel position can be retained by anchoring to the seabed, mooring to a stationary structure (e.g., an anchored buoy), through dynamic positioning, or otherwise retained in a selected geographical position.

The transfer mechanism <NUM> may be extended in the production mode, but can alternatively be retracted and extended in later stages of product delivery. The vessel position may be changing when the vessel <NUM> is underway, wherein the propulsion systems <NUM> drive vessel motion. The mixing volume <NUM> can be in operation (e.g., mixing) while the vessel is underway, or mixing volume operation can be substantially ceased. The transfer mechanism <NUM> is retracted when the vessel is underway, but can alternatively be dynamically extending or retracting as the vessel moves further or closer to the pour site, respectively.

The mixing volume <NUM> of the system functions to mix the disparate reagents to produce the product. In one variation, the mixing volume <NUM> functions as a reactor. The mixing volume <NUM> may be substantially fluidly sealed, but can alternatively equilibrate to the ambient environment. The mixing volume <NUM> includes inlets <NUM> for the reagents and at least one outlet <NUM> configured to fluidly connect to the transfer mechanism <NUM> or displacement mechanism <NUM>. The mixing volume <NUM> may include agitation devices, such as blades, translating surfaces, or any other suitable mixing mechanism. Examples of the mixing volume include a rotary mixing drum, a two-shaft mixer, and a vertical axis mixer, but any other suitable volume capable of retaining a fluid can be used. The system can include one or more mixing volumes. The mixing volume <NUM> is fluidly connected to the reagent storage <NUM> by reagent lines, and may be fluidly connected to the displacement mechanism <NUM> by one or more product lines <NUM>. The mixing volume <NUM> may be supported on the deck <NUM>, but can be arranged within the vessel hull <NUM> or in any other suitable portion of the vessel <NUM>. Alternatively, the mixing volume <NUM> can be a segment of the displacement mechanism <NUM>.

The reagent storage <NUM> of the system functions to retain reagents <NUM> (e.g., components or precursors) of the product. The reagent storage <NUM> may be a container that may be substantially fluidly sealed, but can alternatively be a container that equilibrates with the ambient environment. The reagent storage can include linings or treatments that render the storage container or hull <NUM> substantially inert to the contained reagent <NUM>. Each reagent storage unit stores a single reagent, but can alternatively store a mixture of reagents. Each reagent storage unit includes one or more outlets configured to fluidly connect to the mixing volume <NUM>, and can additionally include one or more inlets for storage filling. However, the storage can be filled and emptied through the same orifice. Reagent flow rate to the mixing volume <NUM> may be controlled by the control system, but can alternatively be manually or otherwise controlled. The reagent storage <NUM> can additionally function to store waste. The waste can be stored in a dedicated reagent storage container, or can be stored in a reagent storage container previously evacuated during product production. The waste may be production waste (e.g., washings, slop, etc.), but can alternatively be any other suitable waste.

As shown in <FIG>, the reagent storage <NUM> can be in-hull <NUM>, on-deck <NUM>, or off vessel (not shown). The system can include one or more types of reagent storage <NUM>. In-hull storage includes containers or containment volumes defined within the hull <NUM>. In-hull storage may be used to store liquid or higher bulk density reagents such as powder, but can alternatively be used to store low bulk density reagents such as aggregate. On-deck storage includes storage containers <NUM> on deck <NUM>. The on-deck storage containers are removably fixed to the deck <NUM> (e.g., tied down, mounted, bolted, welded etc.), but can alternatively be otherwise coupled to the deck. The on-deck storage stores reagents for which a gravitational force can benefit reagent pumping (e.g., by leveraging gravity feeding), or the reagents that require the most energy to move from storage. Such reagents include viscous reagents, such as cement (e.g. Portland cement). However, any other suitable reagent can be stored in on-deck storage.

Off-vessel storage can include one or more auxiliary vessels <NUM> such as barges or rafts, storage containers located on land or on a stationary offshore platform, or any suitable storage containers located off of the vessel. The auxiliary vessel <NUM> may be substantially passive, with little to no on-board propulsion mechanisms. For example, the auxiliary vessel <NUM> can be a barge that must be towed by a tow-boat. Alternatively, the auxiliary vessel <NUM> can have on-board propulsion mechanisms. Alternatively, the off-vessel storage can be the environment, such as the seabed (e.g., as in the case of sediment transport). Off-vessel storage may be substantially passive, and may be coupled to and towed by the vessel. However, the off-vessel storage can be substantially stationary relative to the seabed or include propulsion devices, wherein the off-vessel storage is driven to move with the vessel <NUM>. Off-vessel storage is used to store low bulk density reagents, such as aggregate <NUM>. Off-vessel storage can be preferred when the low bulk density reagent is a significant proportion of the final product. The low bulk density reagent is a reagent that must be shipped to the production site, but can alternatively be a reagent that is locally supplied.

The reagent transporter <NUM> is substantially fluidly sealed along its length, but can alternatively be open. The reagent transporter 330a can be a conveyor belt, buckets, a screw auger, or any other suitable material transportation mechanism. As shown in <FIG>, the reagent transporter 330a is operable between a stored configuration wherein the reagent transporter is collapsed or retracted 330a onto the vessel, and an extended configuration 330b wherein the reagent transporter is extended and fluidly connects to the off-vessel storage or a container on the off-vessel storage. As shown in <FIG>, the reagent transporter lid is in open configuration 330c and ready to draw the stored material.

In the claimed system, the product is ready-mix concrete. The components (reagents) of ready-mix concrete can include materials such as aggregate, cement, water, retardants, and accelerators. Admixtures can be stored in containers in the hull <NUM>, cement can be stored in on-deck storage containers, and water can be stored in hull containers or be derived (e.g., pumped) from the surrounding water. Aggregate <NUM> is stored off-vessel, on an auxiliary vessel <NUM> but alternatively in any suitable off-vessel storage.

As shown in <FIG>, the displacement mechanism <NUM> of the system functions to provide a propulsion force that moves the product from the mixing volume <NUM> to the end site <NUM>. The displacement mechanism <NUM> provides a force capable of pushing a viscous product through a length of the transfer mechanism <NUM>. The displacement mechanism <NUM> provides <NUM>-<NUM> bar (<NUM> to <NUM> t/m<NUM>).

The displacement mechanism <NUM> may be arranged in or connected to the fluid path between the reagent storage <NUM> and the transfer mechanism <NUM>. More preferably, the displacement mechanism <NUM> may be arranged in series between the mixing volume <NUM> and the transfer mechanism <NUM>. However, the displacement mechanism <NUM> can be arranged in parallel between the mixing volume <NUM> and the transfer mechanism <NUM>, arranged between the reagent storage <NUM> and the transfer mechanism <NUM> in series or in parallel, or arranged in any suitable configuration. The displacement mechanism <NUM> may be controlled by the vessel control system, but can alternatively be controlled by a second control system, manually controlled, or otherwise controlled.

The transfer mechanism <NUM> of the system functions to transfer the product from the vessel <NUM> to the desired location. The transfer mechanism <NUM> includes a low-friction interior, such as a coating or bonded layer, but can alternatively include any suitable interior. The transfer mechanism <NUM> may be slightly elastic (e.g., more elastic than steel but less elastic than rubber) to support sudden cross sectional area changes due to collected aggregate in the product stream, but can alternatively be substantially rigid. The system includes a single transfer mechanism, but can alternatively include multiple (e.g., one per mixing volume, multiple for each mixing volume, etc.).

The transfer mechanism <NUM> may be fed by a single line <NUM> from the mixing volume <NUM>, but can alternatively be fed by multiple lines. In an alternative variation of the system, multiple feeder lines, each extending from a respective reagent storage container of a constituent reagent, can feed the transfer mechanism <NUM>. The multiple feeder lines extend through a length of the transfer mechanism <NUM>. The multiple feeder lines keep the reagents fluidly isolated until the multiple lines meet in a single mixing line. The single mixing line is arranged distal the vessel when the transfer mechanism is in the extended mode. The single mixing line includes one or more agitators (e.g., blade, rotating sections, etc.) that mix or react the constituent reagents. This system variation can enable long-distance product supply, as the reagents are not reacted into the product until the reagents are proximal the desired site.

The transfer mechanism <NUM> is configured to float on the surface of the water, and can include flotation devices <NUM> along its length or along given sections. The flotation devices <NUM> are removably coupled to the transfer mechanism <NUM>, but can alternatively be permanently coupled or built in to the transfer mechanism <NUM>. Alternatively, the transfer mechanism <NUM> can be configured to hang under water, wherein the distal end or section proximal the distal end includes a flotation device <NUM>. The transfer mechanism <NUM> can additionally include surface indicators, such as lights or buoys. The transfer mechanism <NUM> hangs under its own weight, but can alternatively include weights that sink the transfer mechanism to a desired depth. In one variation, the transfer mechanism <NUM> may be configured to sink low enough into the water to leverage the deepwater temperature (lower temperature) to extend the concrete curing time.

The transfer mechanism <NUM> may be operable between an extended mode and a stored mode. In the extended mode, at least a section of the transfer mechanism may be extended beyond the boundaries of the vessel <NUM>. In the stored mode, the transfer mechanism <NUM> may be wholly or mainly contained within the boundaries of the vessel. The transfer mechanism <NUM> can be wound about a spool, retracted, or otherwise stored in a compacted state in the stored mode. The transfer mechanism <NUM> may be manually switched between the stored and extended mode, but can alternatively be automatically switched. In one variation of the system, a vessel <NUM> attaches to an end of the transfer mechanism distal the displacement mechanism <NUM> (distal end) and extends the transfer mechanism to the desired location. In another variation, the vessel <NUM> may be brought proximal the desired site, the distal end <NUM> of the transfer mechanism <NUM> attached to the desired site, and the vessel moved away from the desired site, to deeper or less trafficked waters. The transfer mechanism <NUM> can be retracted by winding a spool, applying a retraction force to the distal end <NUM>, or otherwise retracted. In another variation, the transfer mechanism <NUM> may be automatically extended and retracted by an arm or guide. However, the transfer mechanism <NUM> can be switched between the extended and retracted modes in any suitable manner.

The transfer mechanism <NUM> is a spoolable pipe. Also, the transfer mechanism <NUM> may be two or more interconnected lengths of the same type of pipe. Additionally, the transfer mechanism <NUM> may include sections of different types of fluid lines, such as pipes, hoses, and tubing. The pipe is flexible and capable of being stored on a spool. The pipe is a composite bonded pipe, such as the oil and gas downline sold by Airborne™, SHAWCOR, or other comparable product. The pipe is formed of multiple layers, which are bonded. The pipe is formed primarily of a non-metal.

<FIG> shows the transfer of stored material between the off-shore preparation system compartments as dashed arrows. The reagent, aggregate and other additives flow from their storage area to the mixing volume <NUM>. It is possible that the ingredients are moved to a different compartment in the vessel <NUM> before they are poured into the mixing volume <NUM>. The mixing volume <NUM> becomes ready-mix, which is transferred to the transfer mechanism <NUM> through the pump <NUM>.

As shown in <FIG>, the transfer mechanism <NUM> is extended to a target location <NUM> that is proximate to a pour site <NUM>. The transfer mechanism <NUM> acts as a conduit through which the ready-mix flows to the target location <NUM>. The direction of flow is shown as dashed line in <FIG>. The target location <NUM> may be on land or on water (e.g., a docked vessel). The transfer mechanism <NUM>, which is a spoolable pipe, has an outlet end <NUM> that may be guided to the target location <NUM> using an airborne craft, a watercraft, a tether, or other suitable guidance device. For example, the guidance device may physically connect to the outlet end <NUM> of the transfer mechanism <NUM>. In one embodiment, the outlet end <NUM> may have appropriate fittings (not shown) to connect with a fluid conduit that leads to the pour site <NUM>. In other embodiments, the ready-mix concrete may flow out of the outlet end <NUM> into containers or vehicles.

As one skilled in the art will understand, the proximity of the pour site <NUM> from the target location <NUM> depends on the time it takes for the ready-mix to set. Thus, the distance between the pour site <NUM> and the target location <NUM> may be as little as a few hundred feet or as far as <NUM> to <NUM> (<NUM> to <NUM> miles). The extended pipe from the transfer mechanism <NUM> runs generally parallel to the water's surface, being totally submersed, partially submersed, or fully floating in water by the floatation devices <NUM>. The vessel <NUM> may be underway and not be anchored or moored.

Referring now to <FIG>, there is shown a flow chart illustrating a method <NUM> for delivering a ready-mix concrete to a pour site. As used throughout, the term "ready-mix" concrete refers to concrete that is specifically manufactured for delivery to the pour site in a freshly mixed and plastic or unhardened state. Ready-mix concrete may include components such as cement, water and aggregates comprising sand and gravel or crushed stone. The aggregate may make up at least <NUM>% of a total volume of the ready-mix concrete. In aspects, the volume may be <NUM>-<NUM>%.

The method may include the step <NUM> of positioning a waterborne facility on a body of water. The waterborne facility includes a spoolable pipe wound on a spool. The method includes the step <NUM> of guiding an outlet end of a spoolable pipe from the waterborne facility to a target location proximate to the pour site, the step <NUM> of preparing the ready-mix concrete at the waterborne facility, and the step <NUM> of conveying the ready-mix concrete to the target location via the spoolable pipe. It should be noted that the sequence of some of these steps may be varied to accommodate site specific conditions.

In variants, the method may include transporting at least one component of the read-mix concrete to the waterborne facility using a watercraft. Moreover, the method may include docking the watercraft carrying the at least one component at a side of the waterborne facility, rotating the transporter toward the side of the waterborne facility, and positioning an inlet of the transporter in contact with the at least one component.

In variants, the waterborne facility may not be attached to a submerged land mass. By submerged land mass, it is meant the ocean floor, sea bed, or other surface defining the boundary between the water and the earth below. By attached, it is meant that there are no connections between the waterborne facility and the subsea land mass. Thus, there are no risers, anchors, legs, columns, or other structures that connect the waterborne facility to the subsea land mass. In such variants, the method may include dynamically positioning the waterborne facility using a propulsion system associated with the waterborne facility while conveying the ready-mix concrete to the pour site via the spoolable pipe.

In variants, the method may also include displacing the spoolable pipe by pulling the outlet end of the pipe using a suitable vehicle or device and/or rotating the spool on which the spoolable pipe is wound. The spool may be hydraulically actuated using on-board power.

From the above, it should be appreciated that what has been described includes a system for delivering a ready-mix concrete to a pour site. The system includes a waterborne facility positioned in a body of water, a ready-mix concrete preparation system located on the waterborne facility, and a spoolable pipe wound on a spool on the waterborne facility and connected to the ready-mix concrete preparation system.

The ready-mix concrete preparation system includes a mixing volume and a pump in fluid communication with the mixing volume. The pump pumps the ready-mix concrete from the mixing volume into the spoolable pipe. Also, the system may include one or more transporters that convey at least one component of the ready-mix into the mixing volume. The transporter(s) may receive the component(s) from a storage tank on the waterborne facility and/or an adjacent watercraft. The transporter may be configured to convey the component(s) into the mixing volume. Depending on the particular application, the waterborne facility may a self-powered watercraft, an unpowered watercraft, a towed watercraft, a floating offshore platform, and an offshore platform supported by a seabed.

The present disclosure provides methods of delivering ready-mix concrete to a selected site, which may be a land surface, underground, on a water surface, or underwater. One illustrative method includes positioning a waterborne facility on a body of water, guiding an end of a primary spoolable pipe from the waterborne facility to a location proximate to the selected site, and discharging the flowable material through the primary spoolable pipe using a pump. The primary spoolable pipe may be guided along a water's surface.

Claim 1:
A method of delivering a ready-mix concrete composed of a plurality of components to a target location that is proximate a pour site, the method comprising:
positioning a ready-mix concrete preparation system comprising a pump (<NUM>) and a mixing volume (<NUM>) on a waterborne facility (<NUM>);
positioning the waterborne facility (<NUM>) on a body of water, wherein the waterborne facility (<NUM>) includes a spoolable pipe (<NUM>) wound on a spool, and wherein the pump is configured to pump the ready-mix from the mixing volume to the spoolable pipe;
guiding an outlet end of the spoolable pipe (<NUM>) from the waterborne facility (<NUM>) to a target location that is proximate to the pour site;
preparing the ready-mix concrete at the waterborne facility (<NUM>) using the mixing volume (<NUM>); and
pumping the ready-mix concrete to the target location via the spoolable pipe (<NUM>);
characterized by the spoolable pipe (<NUM>) being formed primarily of a non-metal and including a plurality of bonded layers, wherein the spoolable pipe runs generally parallel to the water's surface, being totally submersed, partially submersed or fully floating in the body of water by flotation devices included along its length or along given sections.