Rolled tubular centralizer

ROLLED TUBULAR CENTRALIZER

Field Of invention

[0002] Embodiments of the present invention generally relate to methods and apparatuses 4 downhole operation. More particularly, the invention relates to methods and apparatuses for centralization in wellbores or tubulars.

Background

[0003] In the course of drilling and producing oil and gas wells, it has been found be beneficial to keep the tubular, which may be drill pipe, casing, production pipe, or screens, generally centered in the well. In certain instances it may be desirable to center one tubular within another. By keeping the tubular generally centered in the well a substantially uniform annular area between the wellbore wall and the tubular is maintained. In certain instances, such as cementing the tubular into the well, centralization to provide a substantially uniform annular area is imperative, By having a substantially uniform annular area the cement is better able to fill all voids between the tubular and the well thereby forming a better bond with both the wellbore wall and the tubular.

[0004] A common type of centralizer is a bow spring centralizer. A bow spring centralizer typically includes a number of bows attached to a collar on the upper end of the bow and on the lower end of the bow. The bow typically curves radially outward between the. two collars. In its simplest form the bow spring centralizer slides over a tubular joint and is restricted only by the tubular couplings at either end of the tubular joint. In some situations, when the bow spring centralizer is pushed into a wellbore on a tubular string the leading collar may be stopped by a restriction that will cause the bows to longitudinally compress thereby radially expanding .the bows radially outwards ultimately causing the bow to fail as the tubular string continues to move down into the well. The problem is compounded due to the thickness of the bow spring centralizer's cellars and ribs. Usually the collars and the ribs had the same thickness however the thickness of the centralizer as a whole centralizer was effectively

Date Reçue/Date Received 2020-11-20

PCT/AU2014/000966

Received 05/01/2016

[0009] Another common form of vehicle protection is known as a car bra/ auto bra that uses a protective strip of material or paint to stop chipping of the paint in commonly chipped areas.

[0010] These conventional covers for body panels are not designed to protect vehicle panels all over their accessible surface or from all angles, only from angles commonly needing protection in the urban or sealed road driving environment.

[0011] There are other paint layer products available that are designed to protect the vehicle panels from damage through the paint layers absorbing impacts from foreign objects. These layers incorporate plastics such as polyurethane.

[0012] These paint layers are only designed to protect against commonly encountered urban impacts (such as at the lower front of a car) and are not suited for off-road protection.

[0013] These conventional covers are not suitable for protecting 4WD body panels all over their surfaces when they are driven off-road and encounter impacts from sources uncommon in the typical urban setting.

[0014] The preceding discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the application.

Summary of Invention

[0015] It is an object of this invention to ameliorate, mitigate or overcome, at least one disadvantage of the prior art, or which will at least provide the public with a practical choice.

[0016] The present invention is in the form of a protection system for protecting at least an external body panel of a vehicle, the system comprises at least one hard protective plate which is adapted to be releasably secured to the vehicle to protect the external body panel, an inner surface of the at least one hard protective plate conforms to the external body panel of the vehicle it is adapted to cover so that the hard protective plate abuts and is of the same shape as the body panel, the shape of the protective plate

AMENDED SHEET

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PCT/AU2014/000966

Received 05/01/2016 being such that it is arranged to receive the body panel, the at least one hard protective plate is releasably secured to the vehicle using at least one magnet.

[0017] Preferably, the vehicle is an off-road vehicle.

[0018] Preferably, the vehicle is a 4WD.

[0019] Preferably the external portion of the vehicle is a body panel of the vehicle.

[0020] Preferably the at least one hard protective plate has an outer surface which is exposed to the environment once fitted to a vehicle and an inner surface which lies adjacent the vehicles external portion.

[0021] Preferably an inwardly projecting plate edge extends along at least one edge of the at least one hard protective plate.

[0022] The plate edge may extend transverse to the inner surface of the protective plate in a direction away from the outer surface.

[0023] Preferably one of the at least one hard protective plates is selected from one of the following:

body panels;

a front quarter body panel;

a rear quarter body panel;

a front door panel;

a rear door panel;

a bonnet panel; and a rear panel.

[0024] Preferably, at least a portion of the inner surface of the protective plate is coated with a soft material.

[0025] In accordance with a further embodiment, the present invention provides a vehicle body panel hard protective plate wherein the hard protective plate is adapted to engage a vehicle body panel and is shaped to conform exactly to the vehicle body panel so that the hard protective plate abuts and is of the same shape as the body panel, the shape of the protective plate being such that it is arranged to receive the body panel;

AMENDED SHEET

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PCT/AU2014/000966 ⁴ Received 05/01/2016 wherein the hard protective plate includes a magnet to releasably secure the hard protective plate to the body panel; and wherein the hard protective plate is adapted to remain fixed to the body panel when the vehicle is driven in an off-road environment.

[0026] Preferably, the vehicle is designed to be driven on road and off-road.

[0027] By covering the entire panel of a vehicle body panel, the panel is protected from damage incurred from a plurality of angles when driving a vehicle off road. The magnetic fixing of the plate in a plurality of locations strengthens the attachment of the plate.

[0028] Preferably the vehicle body panel hard protective plate is removable from the body panel of a vehicle.

[0029] In being removable, the plate can be fitted and removed as needed for urban and off-road use.

[0030] Preferably, a plurality of magnets are used to fix the protective plate to the body panel.

[0031] Using magnets makes repeated removal and fitting a simple easily executed process.

[0032] Preferably, the magnets are fixed to the hard protective plate.

[0033] Fixing the magnets to the hard protective plate means that the hard protective plate can be made from a variety of different materials and still be supported by the magnets.

[0034] Preferably, the magnets are removably fixed to the hard protective plate.

[0035] This allows the magnets to be transferred to different panels or for different uses and to be replaced if necessary.

[0036] Preferably, the hard protective plate includes a recess on its internal surface shaped to receive a magnet.

AMENDED SHEET

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[0037] Preferably the magnet is adapted to sit between the internal surface of the plate and the external surface of the vehicle body panel.

[0038] In one aspect of the invention, the hard protective plate is shaped and contoured in the same manner as the body panel to which it is to be attached.

[0039] This creates different protective plates for different vehicle body panels.

[0040] In another aspect of the invention, the hard protective plate conforms to the shape of the outer surface of the body panel of a vehicle.

[0041] Preferably, the hard protective plate is made of thermoformed plastic.

[0042] This makes the hard protective plate cheap and easy to make.

[0043] Preferably the thermoformed plastic is acrylonitrile butadiene styrene (ABS).

[0044] ABS is readily available and used. ABS’s hard properties make it well suited for the present use.

[0045] Preferably, the magnet is a neodymium magnet.

[0046] A strong magnet, such as a neodymium magnet is used so that the hard protective plate does not become removed in the bumpy off-road environment.

[0047] Preferably, the magnet is coated with a soft material.

[0048] Coating the magnet with a soft material stops it from scratching the 4WD body panels that the hard protective plate is protecting.

[0049] Preferably, the soft material is silicone.

[0050] Preferably, the soft material is a rubberized material.

[0051] Preferably, the soft material is neoprene.

[0052] Preferably, the hard protective plate includes a plate edge, wherein the plate edge protrudes transverse to the surface of the hard protective plate.

[0053] Preferably the protrusion from the hard protective plate is in a labrum arrangement.

AMENDED SHEET

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[0054] Preferably, the hard protective plate includes a plurality of plate edges

[0055] Preferably, when the hard protective plate is engaged with the 4WD body panel, the plate edge is adapted to extend past the outer surface of the 4WD body panel inwardly.

[0056] Preferably, the plate edge engages and conforms to a 4WD body panel edge.

[0057] By having the plate edge of the hard protective plate extend past the outer surface of the 4WD body panel, the edges of the hard protective plate are inside the outer surface of the 4WD. This removes the risk of branches or other obstructions connecting with the edges of the plate as they scrape past the plate and pulling the plate off by catching an edge of the plate. It also aids the hard protective plates to stay in position on the 4WD body panels as the edges help the hard protective plate grip the 4WD body panel.

[0058] Preferably the hard protective plate includes a wheel arch edge that is adapted to abut the wheel arch of a 4WD.

[0059] Preferably the wheel arch edge extends further than the plate edge in the direction transverse to the surface of the hard protective plate.

[0060] In yet another aspect of the invention, there is provided an arrangement of 4WD body panel hard protective plates, wherein the arrangement of 4WD body panel hard protective plates are attached to all 4WD body panels.

[0061] In yet another aspect of the present invention, there is provided an arrangement of 4WD body panel protective plates, wherein the arrangement of 4WD body panel hard protective plates are attached to all 4WD body panels except the roof.

[0062] In yet a further embodiment of the present invention, there is provided a method of protecting the surface of 4WD body panels when being driven in an off-road environment, including attaching a 4WD body panel hard protective plate against a corresponding 4WD body panel, so that an inner surface of the hard protective plate abuts against and conforms to an outer surface of the 4WD body panel so that the hard protective plate abuts and is of the same shape as the body panel, the shape of the protective plate being such that it is arranged to receive the body panel and so that the

AMENDED SHEET

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PCT/AU2014/000966 ⁷ Received 05/01/2016 entire outer surface of the 4WD body panel is covered by the hard protective plate to fonn an outer surface of the 4WD.

[0063] Preferably, when the hard protective plate is placed against the corresponding 4WD body panel, the plate edge extends past the outer surface of the 4WD body panel, into the 4WD.

[0064] Preferably, the end of the plate edge is not exposed to the outer surface of the 4WD.

[0065] The present invention is in the form of a protection system for protecting at least an external portion of a vehicle, the system comprises at least one protective panel, the at least one protective panel comprising a first protective surface adapted to be releasably secured to the external portion by at least one magnet.

[0066] In one aspect of the invention the first protective surface is adjacent the vehicle’s external portion when releasably secured thereto.

[0067] In another aspect of the invention the first protective surface is spaced from the vehicle’s external portion when releasably secured thereto.

[0068] In yet a further embodiment of the present invention, there is provided a protection system for protecting at least an external body panel of a vehicle, the system comprising:

placing at least one hard protective plate, which is adapted to be releasably secured to the at least an external body panel of a vehicle to protect the external body panel, against the at least an external body panel of the vehicle;

wherein the protective plate includes a plate edge arranged to extend inwardly towards the vehicle;

wherein an inner surface of the at least one hard protective plate conforms to the external body panel of the vehicle it is adapted to be secured to so that the hard protective plate abuts and is of the same shape as the body panel, the plate edge and the inner surface being arranged to receive the body panel; and wherein the at least one hard protective plate is releasably secured to the vehicle using at least one magnet.

AMENDED SHEET

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CA 2920198 2016-02-02 lower end 154 of the opening 150 may be located at point 17, between point 17 and the lower end 14 of the tubular 20, or between points 17 and 19. Ribs 160 are created by the material of the tubular 20 that remains between the openings 150 after the openings 150 are created in the tubular 20. A first collar 162 and the second collar 164 are created by the material of the tubular 20 that remains above the upper end 152 of the openings 150 and below the lower end 154 of the openings 150 after the openings 150 are created lathe tubular 20. While only the tubular with linear sides is depicted any created tubular may be used. The opening 150 may be formed through tubular 50 in a similar manner. [0036] Figure 13 depicts a tubular 140 having an upper end 442, a lower end 144, openings 146, ribs 148, opening upper end 152, opening lower end 154, and upper can 156, and a lower collar 158. The ribs 148 have been expanded radially outward so that each, of the ribs 148 will have at least one portion, an apex 161 Of each of the ribs 148 that extends further radially outward than other portions of each the ribs 148 or of the tubular 140. So that a portion of each of the ribs 148, typically the apex 161 of each rib 148, will contact the wellbore or other tubular wall (not shown). In many instances at least a portion of each of the. ribs 148 will be treated to enhance the ability of each of the ribs 148 to elastically deform. Any treatment process such as heat treating, cold treating, curing., or any other process known in the industry may be used to enhance the ability each of the ribs 148 to elastically deform.

[0037] In practice it is generally understood that the tubular 140 (i.e. a centralizer) as depicted in figure 13 is placed on a separate tubular so that the collar 158, collar 156, and ribs 148 are generally coaxial with the separate tubular and that each collar 158 and 156 has a reasonably tight fit on the separate tubular. The centralizer may be allowed, to slide up or down the separate tubular within the limits of couplings that are typically attached at either end of the separate tubular although more preferably at least one of the collars 158 or 156 are attached to the separate tubular. Collars 158 or 156 may be attached to the separate tubular by any attachment system known in the industry. For instance, the collars 158 or 156 may be attached to the separate tubular as disclosed by US patent applications 11/749544, 12/042989, 12/756173,13/019084, 13/476807, and 12/913495. The tubular 20, 50, 70, 80, or 90 placed on a separate tubular so that the collars and the ribs may be generally coaxial with the separate tubular. The. tubular 20,50,70, 80, or 90 may be a centralizer 41a similar manner as described in relation to Figure 13.

[0038] Bottom, lower, or downward denotes the end of the well or device away from the surface, including movement away from the surface. Top, upwards., raised, or higher denotes the end of the well or the device towards the surface, including movement towards the

Date Reçue/Date Received 2020-11-20

PCT/AU2014/000966

Received 05/01/2016

Figure 5 is a side view of a front door panel 4WD body protection plate in accordance with an embodiment of the present invention;

Figure 6 is an isomeric view of the protection plate of Figure 5;

Figure 7 is a reverse isomeric view of the protection plate of Figure 5;

Figure 8 is a side view of a rear door panel 4WD body protection plate in accordance with an embodiment of the present invention;

Figure 9 is an isomeric view of the protection plate of Figure Ô;

Figure 10 is a reverse isomeric view of the protection plate of Figure 8;

Figure 11 is a side view of a rear quarter panel 4WD body protection plate in accordance with an embodiment of the present invention;

Figure 12 is an isomeric view of the protection plate of Figure 11;

Figure 13 is a reverse isomeric view of the protection plate of Figure 11 ; and

Figure 14 is a partial cross sectional view of the protection plate of Figure 2 attached to a 4WD body panel.

[0072] In the drawings, like structures are referred to by like numerals throughout the several views. The drawings shown are not necessarily to scale, with emphasis instead generally being placed upon illustrating the principles of the present invention.

Description of Embodiments

[0073] Referring to Figures 1 to 14 generally, the present invention according to an embodiment is in the form of a 4WD body panel protective plate 11. The protective plate 11 is shaped so that its inner surface 12 is of a size, shape and profile to conform to the outer surface of a corresponding 4WD body panel 25 so that the entire body panel is covered by the protective plate 11.

[0074] The protective plate 11 deflects and absorbs impacts that are encountered when a 4WD is driven. In a specific embodiment, the protective plate 11 deflects and absorbs impacts, when a 4WD is driven in the off-road environment, from the 4WD body panels 25 with its outer surface 62. As the protective plate 11 covers the entire body

AMENDED SHEET

CA 2920198 2016-02-02 IPEA/AU

PCT/AU2014/000966

Received 05/01/2016 panel of the 4WD to which it attaches, impacts from all angles and in all positions are deflected and/or absorbed by the protective plate 11 with its outer surface 62.

[0075] The protective plates 11 include plate edges 14 that are positioned to abut the edges of the corresponding 4WD door panel 25 when the plate 11 is engaged with and against the corresponding panel. The plate edges 14 extend as a protrusion 13, transverse to the inner surface 12 of the plate 11 in the direction of the plate 11’s engagement with the 4WD body panel 25. The protrusion 13 takes the form of a labrum. The protrusion 13 extends past the outer surface of the 4WD body panel to which it is attached.

[0076] When a 4WD body panel protective plate 11 is placed on a 4WD body panel 25, the protrusions 13 extend under and past the edge 26 of the corresponding 4WD body panel 25. Where the edge 26 of the 4WD body panel 25 is adjacent another 4WD body panel 25, the protrusion 13 extends into the gap (not shown) between the two 4WD body panels 25. This places the plate edges 14 of the 4WD body panel protective plate 11 away from the outer surface of the 4WD body 25. Therefore, as the 4WD drives amongst trees, embankments, sand dunes, etc. the edges are not exposed to be caught on passing materials, only the outer surface 62 is exposed in this manner.

[0077] Where the 4WD body panel protective plates 11 is a rear quarter protective plate 51, or a front quarter protective plate 21, a wheel arch 20 is covered. To allow the edges of the front quarter protective plate 21 and the rear quarter protective plate 51 to avoid being caught on passing material around the wheel arch, wheel arch edge 23 is included Wheel arch edge 23 extends further than protrusion 13 in the direction of engagement with the 4WD body panels 25 to ensure that the wheel arch edge 23 is covered. This stops wheel arch edge 23 from being caught on passing debris.

[0078] To assist in holding the protective plates 11 in place on the corresponding body panels during rough rides associated with off-road 4WDing, the protective plates 11 use magnets 15. Magnets 15 are placed in a plurality of positions over the inner surface of the protective plate 11, so that the protective plate 11 includes magnets 15 in different locations and importantly so that magnets 15 are evenly placed around the plate edges 14. The extensive use of magnets 15 proximate the plate edges 14 of the protective panel 11 ensures that the plate edges 14 are evenly held down against the 4WD body panel 25 and not susceptible to being caught on passing materials.

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[0079] In a varied embodiment of the present invention, the magnets 15 take the form of strips that are arranged around the inner surface 12 of the protective plate 11.

[0080] In a further varied embodiment of the present invention, the magnet 15 covers all of, or the majority of the inner surface 12 of the protective plate 11.

[0081] To ensure that the protective plates 11 remain in position whilst driving over rough terrain, the magnets 15 are neodymium magnets. Neodymium magnets are used for their strong permanent magnet properties.

[0082] The use of magnets and plate edges 14 allows the protective plates 11 to be easily placed on and removed from the 4WD body panel 25 This is described further below.

[0083] In varied embodiments of the present invention, the magnets 15 are iron nitride, other rare earth magnets or alternative strong magnets as understood by the skilled addressee.

[0084] To avoid the protective plate 11, or the magnets 15 damaging the surface of the 4WD body panels 25 due to movement and friction between the two surfaces when passing over rough terrain, the magnets 15 are coated with a silicon material. This provides a soft interface between the magnets 15, protective plate 11 and the 4WD body panel 25.

[0085] In a varied embodiment of the present invention, the magnets 15 are rubberized to avoid damaging the 4WD body panels 25.

[0086] The inner surface 12 includes recesses 22. Recesses 22 are of the same profile as the magnets 15 that are placed within them. This allows the inner surface 12 of the protective plate 11 to abut the 4WD body panel.

[0087] The magnets 15 are fixed within the recesses permanently. This is achieved with an adhesive, through the profile of the magnets and recess or otherwise as would be understood by the skilled addressee.

[0088] Alternatively the magnets 15 are removable engaged with the recesses 22. This is achieved through the use of clips, pins or otherwise as understood by the skilled addressee.

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[0089] Where the magnets 15 are removably engaged with the recesses 22, the magnets 15 can be removed and repositioned as desired.

[0090] The protective plate 11 is formed of Acrylonitrile butadiene styrene (ABS) plastic so that it is light, cheap and easy to use. The protective plate can be formed using thermoforming, injection moulding, gas assisted moulding, blow moulding, rotation moulding, compression moulding or spin casting.

[0091] In a different embodiment of the present invention, the protective plate 11 is formed of Polylactic acid (PLA) plastic, Polyvinyl acetate (PVA) plastic.

[0092] In a varied embodiment of the present invention, the protective plate 11 can be made from composite materials, aluminium or other materials that are sufficiently strong and hard to protect the 4WD body panels 25 without adding significant amounts of weight to the 4WD as understood by the skilled addressee.

[0093] Referring to Figures 1, 11, 12 and 13, an embodiment of the protective plate 11 of the present invention is a rear quarter protective plate 51. The rear quarter protective plate 51 includes wheel arch edge 23 that hugs a rear wheel arch of a 4WD. It also includes plate edges 14 that hug the rear quarter body panel edges of a 4WD.

[0094] Referring to Figures 2, 3 and 4 an embodiment of the protective plate 11 of the present invention is a front quarter protective plate 21. The front quarter protective plate 21 includes wheel arch edge 23 that hugs a front wheel arch of a 4WD. It also includes plate edges 14 that hug the front quarter body panel edges of a 4WD.

[0095] Referring to Figures 5, 6 and 7 an embodiment of the protective plate 11 of the present invention is a front door protective plate 31. The front door protective plate 31 includes plate edges 14 with protrusions 13 that hug the rear front door panel edges of a4WD.

[0096] Referring to Figures 8, 9 and 10 an embodiment of the protective plate 11 of the present invention is a rear door protective plate 41. The rear door protective plate 41 includes plate edges 14 with protrusions 13 that hug the rear front door panel edges of a4WD.

[0097] It is within the scope of the present invention to provide a bonnet protective plate 11 (not shown) and a rear panel protective plate (not shown).

AMENDED SHEET

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[0098] Referring to Figure 14, the protective plate 11, abuts the 4WD body panel 25. The protective plate 11 protects the 4WD body panel 25 from impacts and scratching.

[0099] It is within the scope of the present invention for the protective plates 11 to be used with a 2WD on road vehicle. It is also within the scope of the present invention for the protective plates to be used on a purely off-road vehicle.

[00100] The workings of the protective plate 11 according to the present invention will be further described in a specific example. The example is not exhaustive and is not to be taken as limiting the present invention to the example only.

Example

[00101] A collection of protective plates 11, including rear and front quarter protective plates 51, 21, front and rear door protective plates 41, 31 are transported on sealed roads to a 4WD off-road track entrance.

[00102] Prior to traveling over an off-road track, the protective plates 11 are positioned over corresponding 4WD body panels so that the inner surface 12 of the protective plate abuts outer surface of the corresponding 4WD body panel 25. The protruding edge 13 is positioned so that it abuts a corresponding edge 26 of 4WD body panel 25. With the inner surface 12 abutting 4WD body panel 25, the magnets 22 become magnetically fixed to the 4WD body panel 25.

[00103] The magnetic fixing of the protective plate 11 to a corresponding 4WD body panel 25 strongly fixes the protective plate in place. The magnetic fixing stops the protective plates 11 from falling off the 4WD body panel 25.

[00104] Alternatively the protective plates 11 can be attached prior to the 4WD traveling over sealed roads to an off-road 4WD track entrance.

[00105] The skilled addressee would understand that different models of 4WD have different profiled body panels to differentiate models from each other. In addition to providing different protective plates 11 for different body panels of a 4WD, it is within the scope of this invention to provide different protective plates 11 for different models of 4WD.

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[00106] The labrum like protrusions 13 of the edges 14 of the protective plates 11 removes edges from the outer surface of the 4WD. This removes the risk of branches or other obstructions catching edges 14 and pulling the protective plates 11 off.

[00107] When the 4WD is returned to the urban environment, the protective plates 11 are removed and stored for later use.

[00106] Modifications and variations such as would be apparent to the skilled addressee are considered to fall within the scope of the present invention. The present invention is not to be limited in scope by any of the specific embodiments described herein. These embodiments are intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein.

[00109] Reference to positional descriptions, such as lower and upper, are to be taken in context of the embodiments depicted in the figures, and are not to be taken as limiting the invention to the literal interpretation of the term but rather as would be understood by the skilled addressee.

[00110] Throughout this specification, unless the context requires otherwise, the word “comprise”or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

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