MXPA00010575A - Solids raised screens. - Google Patents

Solids raised screens.

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Publication number
MXPA00010575A
MXPA00010575A MXPA00010575A MXPA00010575A MX PA00010575 A MXPA00010575 A MX PA00010575A MX PA00010575 A MXPA00010575 A MX PA00010575A MX PA00010575 A MXPA00010575 A MX PA00010575A
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MX
Mexico
Prior art keywords
screen
assembly according
screen assembly
raised
rims
Prior art date
Application number
Other languages
Spanish (es)
Inventor
T Lilie Glenn
Original Assignee
T Lilie Glenn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/427,797 external-priority patent/US6484885B1/en
Application filed by T Lilie Glenn filed Critical T Lilie Glenn
Publication of MXPA00010575A publication Critical patent/MXPA00010575A/en

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  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Filtration Of Liquid (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

A new and unique pattern and use of flexible ribs on a solids filtering screen, such as used in drilling wells for hydrocarbons and other substances, in conjunction with a coordinated system for hanging such screens and directing the flow of trapped solids over the surface of such screens, is disclosed for use with a shaker. The invention counteracts the tendency of trapped solids to migrate to and congregate in the lowest areas of a suspended screen and facilitates discharge, as well as the screen impacting the shaker, and therefore the invention reduces the incidence of screen tearing and increases the flow rate through the screen.

Description

ENHANCED SIZES FOR SOLIDS TECHNICAL FIELD The invention relates to the sieves used to filter and control solids, such as the sieves used to remove solids from the drilling mud used in drilling wells such as hydrocarbon wells. More specifically, the invention relates to a design for evacuation systems for use with flow direction screens, preferably with flexible rims, which reduce the accumulation of solids in particular areas of the screen, which accumulation in other circumstances, reduce the speed of flow and increase the propensity of the screen to tear or break.
PREVIOUS TECHNIQUE The need to control solids, such as in conjunction with the use of drilling mud in the drilling of hydrocarbon wells, has been known for a long time in the prior art. The drilling mud, typically a mixture of clay and water and various additives, is pumped through the hollow drill string (tube, drill collar, drill hole, etc.) down into the well and is expelled to the well. through holes in the trephine. Among other functions, the mud catches cuts (fragments of rock and other solids from the bottom of the well and transports those solids away from the auger when the mud is pumped up and out of the well in the space between the walls of the well and the string of drill rods, in the upper part of the well, the mud loaded with solids is directed to the shale agitator, a device that consists essentially of a series of sieves, which capture and remove the solids from the mud when the mud passes through As indicated in Figure 1, each screen is vibrated by means of vibrating equipment generally shown by the indicator 100 such that a longitudinal flow of solids trapped in any direction on the upper surface of the screen is created. For the removal and removal of solids, this filtration, together with other cleaning processes, allows the mud to be reused, the fineness or thickness of the mesh of a Sieve may vary depending on factors such as the speed and size of the solids to be filtered by the sieve. The finer the mesh, the greater the propensity of the screen to tear. Referring now to the drawings, this propensity to tear is further increased by the tendency of the solids trapped by the sieve 1 to migrate laterally (due to the vibration of the sieve) and congregate to the lower part of the sieve 1, which is suspended as shown in Figure 1. It is virtually impossible to hang a sieve 1 so that the lateral plane of its surface is perfectly horizontal; instead of the center 5 of the screen, it is laterally buckled upwards from the longitudinal edges 2 in the screen 1 as shown in Figure 2, in which case the screen is said to be "overcrowded", or the center 5 it is bent downwards as shown in Figure 3, in which case it is said that the sieve 1 is "sub-hung". If the sieve 1 is overcrowded (Figure 2, the solids tend to congregate at the longitudinal edges 2, if the sieve 1 is sub-hooked (Figure 3) the solids tend to congregate at the center 5. The sieve 1 may comprise a single layer or , as shown in Figures 2, 3, 5 and 6 for illustration, two or more layers, the bottom layer of the screen 9 has a thicker, stronger mesh, to provide support for one or more top layers of the screen 10, which are mainly responsible for the function of filtering solids.The upper layers of sieve 10, is one of a finer mesh, is more prone to tearing.As a measure to limit the tear of the sieve and otherwise reinforce and support the Sieve 1 and to maintain the sieve layers 9 and 10 together, it is known from the prior art how to construct screens with flexible beads 6 of polypropylene or similar material As shown in Figure 1, those ridges 6, in which they generally vary from 3/16 inches to 5/16 inches (0.04 millimeters to 0.07 millimeters), generally comprise a set of longitudinal edges 7 running along the sieve 1 (parallel longitudinal edges) 2), and shorter lateral flanges 8 running between and perpendicular to the longitudinal edges 7, separated at regular intervals. Each set of side flanges 8 running between the longitudinal flange members 7 is stacked with adjacent sets of side flanges 8, thereby creating a pattern of ridges in the shape of a brickwork 6. The flanges are approximately the same thickness as the screen 1 itself (approximately 0.036 inches (0.009 millimeters)) and close to the full thickness of both lower sieve layers 9 and upper layers of the sieve 10. The intersection of the longitudinal flanges 7 and the side flanges 8 creates sieve panels 11; a tear in the upper layers of the screen 10 starting at any particular panel of the screen 11 is prevented from diffusing to the adjacent panels of the screen 11 by means of the ridges 6 forming the edges of the panel 11 where the tearing occurs. A different, higher pattern of beads 6 is also known in the prior art, which counteracts the tendency of trapped solids to flow laterally towards the lower portions of a suspended screen. See U.S. Patent 4,820,407, by Kenneth Lilie, issued April 11, 1989. This reduces the incidence of screen tearing, increases the surface filtration area of the screen, and increases the longitudinal flow of solids trapped through the upper surface of the screen. sieve. The reference numbers 2, 3, 4, and 100 and parts thereof have the same meaning for Figures 4-6 as for Figures 1-3. As indicated in Figures 4-6, the screen 1 has edges 2 connected to latching clamps 3. The members of latching clamps are coupled by clamps 4 to the vibrating equipment generally shown by the reference numeral 100. Referring now to Figure 5, the flange pattern 6 comprises a single longitudinal central ridge 12 extending the entire le of the screen 1 and, on either side of the central rim 12, a set of diagonal rims 13. Each set of diagonal rims 13 comprises a series of equally spaced and parallel diagonal flanges, 13, each flange 13 laterally starting at the longitudinal edge 2 corresponding to such set of side flanges 13 and extending diagonally to the central flange 12. (At the side edges 14 and 15 of the screen 1, some lateral flanges 13 are cut off before actually reaching the longitudinal edges 2 or the central flange 12 or imaginary extensions thereof, per or in other circumstances they are located in them, and are parallel to the full diagonal flanges 13). For each diagonal rim 13 of the diagonal rim assembly 13, there is a corresponding and specular diagonal rim 13 of the other set of diagonal rims 13, starting at the other longitudinal edge 12 and extending diagonally and laterally in the same longitudinal direction and ending therein. point or central flange 12 as its corresponding diagonal flange 13 of the other set of diagonal flanges 13. The thickest of the flanges 12 or 13 is greater than the thickness of the sieve 1 (if it comprises a single layer or multiple layers), and from this In addition, it completely approximates the thickness of the lower layer of the sieve 9 and the upper layer of the sieve 10, the ridges 12 and 13 are slightly raised above the upper surface of the sieve 1, such as 0.007 inches (0.001 millimeters) per above the surface. (Optionally, the entire screen 1 can be edged with flange 6 of similar construction to reinforce the screen 1). Sieve 1 is over-hooked (Figure 5) or sub-hooked (Figure 6) intentionally. If the sieve 1 is overcrowded, then referring to Figure 4, the longitudinal flow of trapped solids is directed onto the upper surface of the sieve 1 from the far lateral end 14 longitudinally of the sieve 1 to the near side end 15. Because the ridges 12 and 13 form a slightly elevated barrier relative to the upper layer of the screen 10, the diagonal flanges 13 tend to cause the trapped solids to move laterally from the longitudinal edges 2 to the center 5 of the screen 1, thereby counteracting the tendency of the solids to congregate at the longitudinal edges 2 of an overcrowded screen (Figure 5). Thus, on the other hand, the screen is sub-hooked, then, again referring to Figure 4, the longitudinal flow of trapped solids is directed from the near side end 15 of the screen 1 to the far side end 14, in which case the side flanges 13 they tend to cause the trapped solids to move laterally from the center 5 towards the longitudinal edges 2, thus counteracting the tendency of the solids to congregate at the center 5 of a sub-hooked screen (Figure 6). The pattern of the screen in US Pat. No. 4,820,407 under field tests shows that screen 1 (in most cases) does not exhibit the tendency for the sludge to be directed along the diagonal ridge pattern towards the dai sieve center. In addition, all models of shale agitator equipment have cushioned flange rail reinforcements placed over the sieve beds for existing equipment. One purpose of these ridges is to serve to support the screen panel as if it were engaged in a vibratory action to effect the screening or separation function. These flanges are normally made of steel, run along the sieve, and are reinforced with different types of rubber to cushion the underside of the metal flange sieves. During the normal operation of the shale agitator, the shock absorber rubber will wear out due to the effects of vibratory movements of the equipment. When this rubber wears away, it leaves an impression on the screen and will eventually cause the screen to wear out if the rubber wears unevenly or breaks and fractures, and wears out, leaving the bottom side of the bottom surface of the screen resting against the metal flanges. If the cushion rubber is not changed on a regular basis, the life of the associated screen will be affected and in a harmful way.
DESCRIPTION OF THE INVENTION The invention comprises an evacuation system used in conjunction with filtering screens of any type, such evacuation systems are at the end of the screen. Such evacuation systems "" may also be in the center of the screen or may have a combination of both types. The screen can be comprised of two opposed diagonal flange assemblies, each set comprising a series of non-uniformly spaced apart and parallel flanges. The screen may have raised channel ridges of various lengths placed along the screen. The separate, high channeling flanges may be spaced apart from each other along any angle of the screen to allow gates to exist between the channeling flanges. These piping flanges may then be spaced apart so that the next adjacent piping flanges connect or open through the flow path for that gate or opening. The screens may also have a cushion or flange rail support within the screen body, formed by molten plastic or laminated at the points on the screen surface where the flanges of the rail reinforcements on the damping flanges of the shale agitators they will make contact with the sieve.
BRIEF DESCRIPTION OF THE DRAWINGS To better illustrate and describe the nature and objects of the present invention, it is necessary to refer, in the declaration of "Previous Technique", which immediately precedes, as well as in the "Detailed Description of the Invention", to the drawings. Therefore, the drawings are briefly described here together with a brief description of the relevant parts, each of which is given the same reference number in all the drawings in which such parts appear: Figure 1 is a description of a sieve like the one typically constructed in the prior art, seen from the top. The screen 1 is hung or suspended as follows: the two opposite longitudinal edges 2 of the screen 1 are fastened tightly all along their length by hooking clamps, which in turn are inserted in the hooks 4 for hanging or suspending the sieve 1; Figure 2 is a horizontal and side view of the screen 1 in an "overhung" position as explained above, which describes the lateral flow of solids on the upper surface of the screen 1 as constructed using the prior art; Figure 3 is a horizontal and side view of the screen 1 in a "sub-hooked" position as explained above, which describes the lateral flow of solids on the upper surface of the screen 1 as constructed using the prior art; Figure 4 is the same illustration of Figure 1, except that the screen 1 is shown incorporating a different configuration as described above; Figure 5 is a horizontal and side view of the screen 1 of Figure 4 in an "over-hung" position, which describes the effect of lateral flow of solids on the upper surface of the screen 1; Figure 6 is a horizontal and side view of the screen 1 of Figure 4 in an "over-hung" position, which describes an effect on the lateral flow of the solids on the upper surface of the screen 1; Figure 7 is a planar view of the screen 20 of the preferred embodiment of the present invention; Figure 8 is a planar view of a screen 40 of the preferred embodiment of the present invention; Figure 9 is a description of a screen 1 seen from the top having a fold of the preferred embodiment of the present invention; Figure 10 is a planar view of a screen 60 of the preferred embodiment of the present invention showing elevated channel ridges of a downward size as they run along the screen from the top-of the discharge end, which can being on both sides, and the sequence of separate diagonal rising rims moving towards the discharge end; Y; Figure 11 is a planar view of a screen 60 of the preferred embodiment of the present invention, showing the raised channel ridges, the length and spacing of which may be on both sides of the screen, and a sequence of increasing diagonal flanges separated moving towards the discharge end; and Figure 12 is a planar view of a screen 60 of the preferred embodiment of the present invention, showing the raised channel ridges of alternating sizes; Figure 13 is a side view of any of Figures 10-12; Figure 14 is a planar view of a screen of an alternative embodiment of the present invention with raised channel ridges of an alternate horizontal / vertical configuration; Figure 15 is a planar view of a screen of a second preferred embodiment of the present invention; Figure 16 is a planar view of a screen of a third preferred embodiment of the present invention; and Figure 17 is a planar view of a screen of a third preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION Referring to Figure 7, there is shown a screen 20 similar to the screen 1 except that it has a central section 25. The central section 25 of the screen 20 comprises lateral flanges 27 extending the entire length of the screen. sieve 20 and traversed by side ridges 29. The side flanges 29 extend from a flange 31 to a second border 33, each of which extends in the same manner as the flanges 27 but which are thicker than the ridges 27. The diagonal flanges 13 terminate with the border flanges 31, 33. The screen 20 will connect the vibrating equipment 100 in the same manner as shown in Figure 4. The screen 20 will be positioned with respect to the mud flow as set forth in FIG. Figure 7. The flanges 27, 29, 31 can be arranged to be of rectangular shape of various sizes, both widthwise and lengthwise and are placed in a central area -of the sieve 23, to allow a flow or continuous drilling mud. The drilling mud flow improves due to the larger open area of the sieve 23 in the central potion 25 allowing higher performance. As shown in Figure 8, an alternative screen 40 having a series of diagonal rims 13 and a single longitudinal central ridge can be used. The central rim 12 extends the entire length of the screen 40. On each side of the central rim 12 there is a set of diagonal rims 13. Each set of diagonal rims 13 comprises a series of equally spaced and parallel diagonal rims 13, each flange 13 starting laterally at the longitudinal edge 12 corresponding to each set of diagonal flanges 13 and extending diagonally to the central flange 12. In this way, the "V" pattern configuration is designed at varying intervals. The upper part of the screen, with the mud flow shown in Figure 8, has a closed pattern since the sludge is initially dropped on the screen and then the pattern opens to a larger "V" as it flows the mud, preventing therefore that the sieve be closed, due to the greater open area, allowing greater yield. In this way, the flanges 130 have a significantly greater spacing from each other of the flanges 13. The flanges 13, 130 can each have a variable spacing from each other or can be grouped into spacing intervals as shown in Figure 8. Referring to FIG. Fig. 9, there is shown a sieve 1 of the type of Figs. 4-6 as any separate diagonal flange 135. The sieve 1 could also be any other prior art screen or any subsequently developed screen, including that shown in Figs. Figures 1-3 and the preferred embodiments of Figures 7 and 8. Attached to the screen 1 is a 90 degree reinforcement bend 50, over the entire width, of the discharge end of the screen 1, which is perpendicular to the belts Laterally engaging 3. The fold 50 extends downwardly from the discharge end of the screen 1 approximately one inch (2.54 centimeters) from the upper surface of the screen. The fold 50 is a solid continuation of the margin bordering the pattern of the screen on the discharge end of the screen 1. The fold 50 represents a stiff, solid extension of the screen 1 which makes it possible to stiffen the discharge end of the screen 1 to facilitate a more efficient solids discharge from the discharge end of the sieve surface, either on the next sieve (not shown) or out of the entire sieve to the discharge area (not shown). The reinforced stiff area created by the bend 50 will prevent tearing of the screen resulting from a loose area of the screen prone to excessive movement. In this way, the tears of screen 1 that would normally result from a loose area of the screen would be prevented. The direction of flow is as shown in Figure 9, so that the fold 50 is on the discharge end. As shown in Figures 10-13, diagonal ribs 130 of any screen of the above embodiments or any other prior art screen, may have one or more raised channel ribs 250. Those ribs 13Q may be in a variety of positions. The riser risers 250 may be located on the diagonal ribs 130 and on the sieve 60 may be of equal length and spacing as shown in Fig. 10 and may be present on both sides of the sieve 60 instead of only one side as shown. shown in Figure 10 or the raised riser flanges 250 may be of descending size as they run along the sieve 60 from the top to the discharge end as shown in Figure 11 and may be present on both sides from a screen 60 instead of just one side as shown in Figure 11, or the raised channeling ribs 250 may be of unequal lengths, and be stacked, starting from the top 60 and alternating as the channeling flanges elevated 250 run from the top of the sieve 60 to the discharge end as shown in Figure 12, and may be present on both sides of the 60 sieve instead of only one side, as shown in Figure 12. In all those cases, the riser riser 250 can be used as part of the stirring surface of the screen as shown in Figure 13. The raised riser flanges 250 are made of a polypropylene, high temperature, welded by fusion to the existing rims on the upper surface of the sieve with the diameter fluctuating from 3/16 inches to 1/4 inches (0.04 millimeters to 0.06 millimeters). The riser risers 250. usually run only over a portion of the full length of the diagonal flange 130. The riser risers 250 are attached to the top of the sieve 260, the diagonal flanges 130 by the use of a fusion weld. thermally, preferably.
The embodiment of the present invention as explained above produces a significant dispersion of the solids trapped on the upper surface of the screens 1, 20, 40, 60, thereby reducing the incidence of screen tearing in the areas of new screens 1, 20, 40, 60 where solids would otherwise have to congregate. Also, the greater dispersion of the trapped solids allows a greater flow through the sieves 1, 20, 40, 60 for two reasons: (1) there is less surface blockage caused by the congregation of solids, (2) the longitudinal flow of the solids trapped on and off the sieves 1, 20, 40, 60 or otherwise through the center of the sieve 20 is improved and (3) more effectively facilitates the use of the surface area of the available sieve. As shown in Figure 14, and as applicable to the prior art screens 1, and also, for example, Figures 10-13, the screen 1 which is a square pattern of two inches by two inches (5.08 centimeters) by 5.08 centimeters) has 25D mud directors applied by, for example and preferably, a fusion weld, to the surface bonded to the face of the screen 1. The mud directors applied to the surface 250 direct the flow of mud to the surface. center of the sieve 1 and improve the distribution of the cut to achieve a more efficient separation to overcome the natural tendencies of the machine of the type of crown to pass / force the cuts (not shown) next to the sieve 1. The mud directors 250 are , preferably, of propylene applied by fusion welding, of 1/4 inch (0.06 millimeters) high and of variable lengths and patterns that are placed on the surface of the oil field drilling screens, 1, 20, 40, 60 to direct and redirect slurry drilling suspensions. In the upper part or primary sieve 1, 1, 20, 40, 60 (feeding screen) on a stirrer 100 it takes all the flow of the cuts and the sludge since they are discharged on the feeding screen to start the separation process of the drilling mud cuts. The greater this separation process on the feeding screen 1, 20, 40, 60, greater recovery of the drilling mud and the cuts are then allowed to move downwards towards the surface of the sieve 1, 20, 40, 60 for dry until they are finally discharged on the final screen 1, 20, 40, 60. The strategic placement of the directors 250 on the primary screen 1, 20, 40, 60 is useful to achieve this primary separation and mud handling capabilities of drilling. When the suspension (cuts and mud) hits a mud director 250, the cuts flow towards the mud director line 250, the drilling fluids run over the mud director and can be recirculated better through the sieve 1, 20, 40 , 60 as a result of the separation occurring, at the point of the mud director 250. The area of the screen immediately behind the mud director 250 becomes a "swirl" so that the drilling mud flows through the sieve 1, 20, 40, 60 unimpeded by the cuts. The placement of additional mud directors 250 on the face of the sieve 1, 20, 40, 60 creates numerous areas for a better fluid passage. After a primary separation of the cuts and fluids on the feeding screen 1, 20, 40, 60, the cuts are now separated and must move downwards towards the surface of the screen before being discharged. The further cuts in this process, the greater the use of the sieve and the result of drier cuts. Dryer cuts allow for more efficient removal and less expensive cutting costs (cuts must be removed from the work site and hauled away) and reduce the loss of drilling mud. The placement, length and direction (angle) of the mud directors 250 can increase the retention time if the cuts are actually on the surface of the screen. This additional time allows the increase of dryness of the cut. Mud managers 250 are strategically placed on the surface of the sieve 1, 20, 40, 60 to increase for all purposes of the retention time of the cuts. The mud directors are positioned at an angle and an increase in length means that the cuts must flow along the mud directors 250 in the vibratory process. When the trajectory of mud directors 250 * is not a straight line, the movement takes longer to get out of the screen and therefore increases the retention time on the screen surface and a drier cut and greater separation occurs on the screen. sieve. The standard solids control equipment 100 is constructed with a crown-shaped cover. This means that the roof is higher at the center point than at the side points as discussed above. This inherent characteristic means that a perforation suspension hits the surface of the screen, the suspension has a tendency to migrate to the sides of the screen. Lateral migration produces a trend known as the "horse-shoe effect". The "horse shoe effect" is so called because it resembles a horseshoe horse. The sides of the horseshoe are perforation suspensions on the side of the sieves that are not being separated and this results in a significant loss of mud, since it is allowed to migrate downwards, towards the sides of the sieve to be discharged . Sludge managers 250 when placed along the sides of screens 1, 20, 40, 60 overcome this "horse shoe effect" and redirect the suspension back to the center of the screen for better fluid distribution / cuts and a more efficient sieving. This contrasts with other attempts to overcome the? horseshoe effect "and involves the use of a flat screen, the three-dimensional screen and the pre-tension screen on special types of equipment that are all very expensive and require additional equipment, as shown in Figure 15, the mud directors 250 are transformed by making the combination of mud directors 250 with mud gates 300. The mud gates 300 are hollow areas along the lines of the mud directors 250. This configuration can be used for any of the sieves 1, 20, 40, 60. In Figure 15, a v-screen is used. The mud-gates v 300 allow the drilling mud to flow through the hollow areas 300 after being directed into the gap 300 by the mud directors 250. This prevents the sludge from accumulating along the directors 250 allowing a better distribution of the fluid / cuts and eliminates the wear of the sieve that may occur After the mud gates v (current aba jo) 300 are placed at specific points along the mud directors 250 to improve the fluid / cut distribution to allow an increase in the retention time of the cuts on the sieve 1, 20, 40, 60, producing This mode a drier cut. In this way, the drilling mud no longer flows in the direction of the screen surface without a method for direction or redirection to achieve a longer retention cut-off time. Accordingly, the shale stirring machine 100 is not the equipment wholly responsible for the retention time. The v-pattern with the sludge managers 250 and the slug gates in v 300 overcomes the natural tendency of the crown type machines 100 to send the drilling mud fluids to the sides of the sieve 1, 20, 40, 60 , producing the trend known as "horse horseshoe effect". The v-mud managers 250 and the mud-gates in v 300 locate the effect of the corona-type machine 100 by directing the flow of mud away from the sides and towards the center of the sieve 1, 20, 40, 60, such as the v-sieve 20, 40, 60, and while it is on the v-250 sludge managers, the mud-gates at v 300 allows the drilling fluid to flow downwards., 40, 60, for a better drying due to the increase of screening and reduction for the dryer and the increased retention time on the screen, such as the sieve 60. The intentional voids, gates of mud in v 300, along the lines of the mud directors in v 250 produce the gate effect. The mud gates in v 300 can be of different lengths and are in different positions depending on the sieve time, size and configuration, as is the case for mud directors in v 250, which can be located through the line of flow of the adjacent sludge gate 300. Figure 16 illustrates the use of sludge managers 250 and sludge gates 300, such as a flat screen, instead of a v-screen 20, 40, 60. As seen in the Figure 17, a screen 1, 20, 40, 60, is provided with a flange rail cushion support 400 within the screen body. The plastic is melted and laminated to form a shock absorbing support 400. The shock absorbing support 400 is positioned at the exact points on the underside surface of the screen where the reinforcement of the cushioned flange rail of the shale agitator equipment (not shown) will make contact. with a sieve 1, 20, 40, 60. The plastic forms the continuous support 400 running the length of each and every one of the flange supports (not shown) and thus along the entire length of the sieve 1, 20, 40, 60. The mattress 400 protects the sieve 1, 20, 40, 60 from premature wear due to the wear of the padded tube on one end against failure to change the padded tubes on the other end. The mattress 400 provides a protective layer to limit friction between the underside of the screen and the flanges of the equipment 100 (not shown) which also lead to premature failures of the screen 1, 20, 40, 60. In this way, the mattress 400 provides additional support to the body to improve the integrity of the screen 1, 20, 40, 60, to increase the life of the screen. Mattress 400 is a multipurpose feature that can be used on all types and patterns of screens, including single-layer or multi-layer laminates that can include designs with a pattern that are flat, square, rectangular, diagonal, circular, diamond-shaped and similar. By means of such reinforcement, the mattress 400 prevents the drilling solids or cuts from locating between the underside of the screens 1, 20, 40, 60, and the padded tubes, which will aggravate the distortion of the screen and lead to a reduced life. of the sieve. In this way, the mattress 400 reduces the amount of time involved in changing worn-out screens. The loss of mud is also reduced as a result of the wear or tear of the sieves. In addition, the mattresses 400 increase the tension between the built-in mattresses 400 to produce a uniformly more tensioned screen 1, 20, 40, 60, reducing the likelihood of the screen tension problems commonly associated with a reduced sieving life. Other and various modalities and uses of the inventive concept taught herein are possible, and therefore the details of the present should be interpreted as illustrative and not in a limiting sense.

Claims (1)

  1. CHAPTER CLAIMING Having described the invention, it is considered as a novelty and, therefore, what is claimed is contained in the following CLAIMS: 1. A screen assembly for filtering solids for connecting to a vibrating equipment, having hooks connected to the vibrating equipment, for directing the flow of the trapped solids in a given direction, characterized in that it comprises: - a screen having longitudinal edges; - a screening layer of the screen, having a screen surface ending in longitudinal edges and lateral edges, one of the lateral edges forming the discharge end of the screen; - where the screen layer includes a fold at the discharge end, the fold extends down from the screen surface. 2. The screen assembly according to claim 1, characterized in that the fold is a fold of 90 degrees, the 90 degrees being between the fold and the surface of the screen. 3. The screen assembly according to claim 2, characterized in that the fold extends approximately 2.54 centimeters (one inch) from the surface of the screen. 4. The screen assembly according to claim 1, characterized in that the screen includes diagonal ridges on the surface of the screen that end at the longitudinal edges. The screen assembly according to claim 4, characterized in that at least one of the diagonal rims includes a raised channeling rim. 6. The screen assembly according to claim 5, characterized in that the raised channeling rim runs only along a portion of the length of the diagonal rim. 7. The screen assembly according to claim 6, characterized in that there is more than one such high channeling rim, each of the raised channel rims are mounted on a corresponding one of the diagonal rims and each of the rim flanges. Raised pipes run only along a portion of the corresponding diagonal ridge length. F 8. The screen assembly according to claim 7, characterized in that the raised ducting rims are of equal length. 9. The screen assembly according to claim 7, characterized in that the raised channel ridges are not of the same length. The screen assembly according to claim 9, characterized in that the raised ducting rims are of two lengths, the long ducting rims of the greater length are upstream of the elevated ducting rims of the shorter length. The screen assembly according to claim 9, characterized in that the longer riser risers are interdispersed with the shorter riser risers. 12. A screen assembly for filtering solids to be connected to vibrating equipment, having hooks connected to the vibrating equipment, for directing the flow of solids trapped in a given direction, characterized in that it comprises: - a screen having longitudinal edges and one end download - hook clamps connected to a first end of the hooks and at a second end to one of the longitudinal edges; - the screen includes: - a screen layer having longitudinal edges; - a set of flexible flanges, the flanges cover a portion of the screen layer and include two opposed diagonal flange assemblies, each set having a series of flanges spaced apart from the screen layer and extending diagonally over the screen layer; where each of the diagonal, flexible flanges has a first separation between the ridges and a second spacing between the flanges, the second spacing is greater than the first spacing, the second spacing extends to the discharge end of the sieve. 13. The screen assembly according to claim 12, characterized in that it also includes a fold, the fold extends down one of the side edges. The screen assembly according to claim 12, characterized in that at least one of the diagonal rims includes a raised channeling rim. 15. The screen assembly according to claim 14, characterized in that the raised channeling rim runs only along a portion of the length of the diagonal rim. 16. The screen assembly according to claim 15, characterized in that there is more than one such high channeling ridge, each of the raised channeling rims are mounted on a corresponding one of the diagonal rims and each of the rims of Raised pipes run only along a portion of the corresponding diagonal ridge length. 17. The screen assembly according to claim 16, characterized in that the raised ducting rims are of equal length. 18. The screen assembly according to claim 16, characterized in that the raised channel ridges are not of the same length. 19. The screen assembly according to claim 18, characterized in that the raised ducting rims are of two lengths, the long ducting rims of the greater length are upstream of the elevated ducting rims of the shorter length. 20. The screen assembly according to claim 18, characterized in that the longer riser risers are interdispersed with the shorter riser risers. 21. A screen assembly for filtering solids to be connected to vibrating equipment, having hooks connected to the vibrating equipment, to direct the flow of solids trapped in a given direction, characterized in that it comprises: - a screen having longitudinal edges and side edges; - hook clamps connected to a first end of the hooks and at a second end to one of the longitudinal edges; - the screen includes: - a screen layer having a longitudinal central section and longitudinal edges; - a set of flexible ridges, the ridges cover a portion of the screen layer and include two opposed diagonal flange assemblies, each set having a series of spaced ridges beginning at the longitudinal edges of the screen layer and extending diagonally and laterally towards the longitudinal central section; - where the central section includes a set of central longitudinal ridges running substantially longitudinally along the entire length of the screen layer, the assembly has a series of spaced ridges between the side edges of the screen layer. 22. The screen assembly according to claim 21, characterized in that the central section is joined on either side by an end flange, the end flange ends at the diagonal flanges. 23. The screen assembly according to claim 21, characterized in that it also includes a fold, the fold extending down from the side edges. 24. The screen assembly according to claim 21, characterized in that at least one of the diagonal flanges includes a raised channeling flange. 25. The screen assembly according to claim 24, characterized in that the raised channeling rim runs only along a portion of the length of the diagonal rim. 26. The screen assembly according to claim 25, characterized in that there is more than one such high channeling rim, each of the raised channel rims are mounted on a corresponding one of the diagonal rims and each of the rim flanges. Raised pipes run only along a portion of the corresponding diagonal ridge length. 27. The screen assembly according to claim 26, characterized in that the raised ducting rims are of equal length. 28. The screen assembly according to claim 26, characterized in that the raised channel ridges are not of the same length. 29. The screen assembly according to claim 28, characterized in that the raised ducting rims are of two lengths, the long ducting rims of the greater length are upstream of the elevated ducting rims of the shorter length. 30. The screen assembly according to claim 28, characterized in that the longer riser risers are interdispersed with the shorter riser risers. 31. A screen assembly for filtering solids to be connected to vibrating equipment, having hooks connected to the vibrating equipment, for directing the flow of solids trapped in a given direction, characterized in that it comprises: - a screen having longitudinal edges; - a screening layer of the sieve, having a sieve surface and ending in longitudinal edges and lateral edges, one of the lateral edges forming the discharge end of the sieve, - where the sieve includes ridges mounted on the sieve surface, and a portion of at least one of the flanges includes a raised channeling flange. 32. The screen assembly according to claim 31, characterized in that there is more than one such high channeling rim, each of the raised channel rims is mounted on a corresponding one of the diagonal rims and each of the rim flanges. The elevated channeling runs only along a portion of the corresponding diagonal shoulder length. 33. The screen assembly according to claim 32, characterized in that the raised ducting rims are of equal length. 34. The screen assembly according to claim 32, characterized in that the raised ducting rims are not of the same length. 35. The screen assembly according to claim 34, characterized in that the raised ducting rims are of two lengths, the elevated ducting rims of the greater length are upstream of the raised ducting rims of the shorter length. 36. The screen assembly according to claim 34, characterized in that the longer riser risers are interdispersed with the shorter riser risers. 37. The screen according to claim 31, characterized in that the raised channel flange is made of melt-welded polypropylene. 38. The screen assembly according to claim 31, characterized in that the raised ducting rim is joined to the upper part of the diagonal rim. 39. The screen assembly according to claim 38, characterized in that the raised ducting flange is connected to the diagonal rim by fusion welding 40. The screen assembly according to claim 31, characterized in that the ducting flange. high has a height of 3/16 inches to 1/4 inches (0.04 millimeters to 0.06 millimeters) 41. A screen assembly for filtering solids to connect to vibrating equipment, which has hooks connected to the vibrating equipment, to direct the flow of solids trapped in a given direction, characterized in that it comprises: a screen having longitudinal edges, a screening layer of the screen, having a screen surface and ending in longitudinal edges and lateral edges, one of the lateral edges forming the end Sieve discharge, where the screening layer includes ridges and a bend at the discharge end, the bend extends downward from the surface of the sieve; - wherein at least one of the flanges includes a raised channeling flange. 42. The screen assembly according to claim 41, characterized in that the raised channeling rim runs only over a portion of the length of the rim. 43. The screen assembly according to claim 42, characterized in that there is more than one such high channeling flange, each of the raised channeling flanges is mounted on a corresponding one of the flanges and each of the channeling flanges. elevated runs only on a portion of the length of a corresponding one of the ridges. 44. The screen assembly according to claim 43, characterized in that the raised duct beads are of equal length. 45. The screen assembly according to claim 43, characterized in that the raised ducting rims are not of the same length. 46. The top assembly according to claim 45, characterized in that the raised ducting rims are of two lengths, the long ducting rims of longer length are upstream of the longer ducting rims of shorter length. 47. The screen assembly according to claim 42, characterized in that the longer riser risers are interdispersed with the shorter riser risers. 48. The screen assembly according to claim 43, characterized in that at least two of the raised channeling flanges are adjacent and there is a gate between the adjacent elevated channeling flanges, forming a flow path. 49. The screen assembly according to claim 48, characterized in that a channeling ridge high in the flow path is included on the adjacent flange of the gate flange. 50. The screen assembly according to claim 41, characterized in that the flanges are diagonal flanges. 51. A screen assembly for filtering solids to be connected to the vibrating equipment, which has hooks connected to the vibrating equipment, to direct the flow of solids trapped in a given direction, characterized in that it comprises: a screen having longitudinal edges and a discharge end; latching clamps connected at a first end of the hooks and at a second end to one of the longitudinal edges; the screen includes: a screening layer having longitudinal edges; a set of flexible ridges, the ridges cover a portion of the screening layer; where at least one of the flanges includes a raised channel flange. 52. The screen assembly according to claim 51, characterized in that the raised channeling rim runs only over a portion of the length of the rim. 53. The screen assembly according to claim 51, characterized in that there is more than one such high channeling rim, at least two of the raised channel rims are mounted so as to form an opening therebetween. 54. The screen assembly according to claim 53, characterized in that the raised ducting rims are mounted on the same rim and are of equal length. 55. The screen assembly according to claim 53, characterized in that the raised ducting rims are mounted on the same rim and are not of equal length. 56. The screen assembly according to claim 51, characterized in that the flanges are diagonal flanges. 57. A screen assembly for filtering solids to be connected to the vibrating equipment, which has hooks connected to the vibrating equipment, to direct the flow of solids trapped in a given direction, characterized in that it comprises: - a screen having longitudinal edges and an end of discharge; latching clamps connected at a first end of the hooks and at a second end of the longitudinal edges; the sieve includes: a screening layer having longitudinal edges; wherein the screening layer includes a raised channeling flange. 58. The screen assembly according to claim 57, characterized in that the raised channeling rim runs only on a portion of the screening layer. 59. The screen assembly according to claim 58, characterized in that there is more than one such high channeling rim, at least two of the raised channel rims are mounted so as to form an opening therebetween. 60. The screen assembly according to claim 59, characterized in that the raised duct beads are of equal length. 61. The screen assembly according to claim 59, characterized in that the raised ducting rims are not of the same length. 62. The screen assembly according to claim 59, characterized in that the opening allows the flow of the solids and there is included a channeling flange elevated downstream of and through the flow path. 63. "A screen assembly for filtering solids to be connected to vibrating equipment, the vibrating equipment has a damping rim rail reinforcement and hooks connected to the vibrating equipment, to direct the flow of trapped solids in a given direction, characterized in that comprises: - a sieve having longitudinal edges; and a lower surface; a screening layer of the sieve, having a sieve surface and ending at longitudinal edges and lateral edges, one of the lateral edges forming the discharge end of the sieve; where the screen includes a flange rail damping support mounted on the lower surface in a position opposite to the reinforcement of the damping rim. 64. The screen assembly according to claim 63, characterized in that the screen includes flanges mounted on the surface of the screen. 65. The screen assembly according to claim 64, characterized in that at least a portion of at least one of the flanges includes a raised channeling flange. 66. The screen assembly according to claim 64, characterized in that the ridges form squares. 67. The screen assembly according to claim 64, characterized in that the ridges are diagonal across the surface of the screen. 68. The screen assembly according to claim 63, characterized in that the screen is of a single layer. 69. The screen assembly according to claim 63, characterized in that the screen is laminated in multiple layers. 70. The screen assembly according to claim 69, characterized in that the laminate includes designs with a pattern, which are flat. 71. The screen assembly according to claim 69, characterized in that the laminate includes designs with patterns that are square. 72. The screen assembly according to claim 69, characterized in that the laminate includes designs with patterns that are rectangular. 73. The screen assembly according to claim 69, characterized in that the laminate includes designs with patterns that are diagonal. 74. The screen assembly according to claim 69, characterized in that the laminate includes designs with patterns that are circular. 75. The screen assembly according to claim 69, characterized in that the laminate includes patterned designs that are diamond-shaped. 76. The screen assembly according to claim 63, characterized in that there is more than one flange rail damping support, each of the flange rail damping supports are mounted on a corresponding one of the damping flange reinforcements. 77. The screen assembly according to claim 63, characterized in that the flange rail damping supports run along the entire length of the corresponding damping ridge reinforcement. 78. The screen assembly according to claim 31, characterized in that the raised channel flange is made of high temperature, oil resistant propylene. 79. The screen assembly according to claim 63, characterized in that the cushion supports of the flange rail include plastic. 80. The screen assembly according to claim 79, characterized in that the plastic is melted and laminated to form the buffer supports of the flange rail.
MXPA00010575 1999-10-27 2000-10-27 Solids raised screens. MXPA00010575A (en)

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US09/427,797 US6484885B1 (en) 1998-05-01 1999-10-27 Solids raised screens

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