• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An apparatus may include a first blade (202) curved for use in a centrifuge (200). The centrifuge (200) may be for collecting debris particles in a fluid flowing through the centrifuge (200). The first curved blade (202) may include a plurality of eccentric slots (204). The first curved blade (202) may include a groove (208) positioned at an outer edge (206) of the curved blade (202). The first curved blade (202) may also include a first coupling member (210) and a second coupling member (212). The first and second coupling members (210, 212) may be for coupling the first curved blade (202) to a second blade (202) curved around a central axis.
    公开号:FR3039425A1
    申请号:FR1656027
    申请日:2016-06-28
    公开日:2017-02-03
    发明作者:Bo Gao；Nicholas Budler；Linda Xin
    申请人:Halliburton Energy Services Inc；
    IPC主号:
    专利说明:

    Technical area
    The present disclosure relates generally to the drilling and completion of wellbores. More specifically, but not limited to, the present disclosure relates to assemblies for use in controlling the entry of debris and particulate matter into a casing string.
    Context
    During the completion of the wellbore, the annular space between the wellbore wall and a casing string (or casing) can be filled with cement. This process can be called the "cementing" of the wellbore. The casing string may comprise floating equipment, for example a floating collar and a guide shoe. Fluid, such as fluid or drilling mud, may be present within the wellbore. The fluid may comprise debris particles. The fluid, including the debris particles, can enter the casing string and can come into contact with the floating equipment. Debris particles can partially or completely plug the valves of the floating equipment and can contaminate the cement. Floating equipment may not function properly when cementing the wellbore when the valves are partially or completely plugged. The cementing operation may be weak or otherwise fail to function properly when the floating equipment is not operating properly, for example due to clogged valves or the resulting contaminated cement.
    Brief description of the drawings
    Figure 1 is a schematic view of a well system including a filter assembly positioned within a casing string, in accordance with one aspect of the present disclosure.
    Fig. 2A is a perspective view of an example of a centrifuge for use in the filter assembly of Fig. 1, according to one aspect of the present disclosure.
    Figure 2B is a perspective view of a blade of the centrifuge of Figure 2, according to one aspect of the present disclosure.
    Fig. 2C is an enlarged perspective view of a portion of the blade of Fig. 2B, according to one aspect of the present disclosure.
    Fig. 2D is a perspective view of a portion of the centrifuge of Fig. 2A, according to one aspect of the present disclosure.
    Fig. 3 is a perspective view of the centrifuge of Fig. 2A coupled to another centrifuge according to one aspect of the present disclosure.
    Figure 4 is a cross-sectional side view of a filter assembly that includes a particle accumulator and a filter element, according to one aspect of the present disclosure.
    Fig. 5 is a cross-sectional side view of another filter assembly which comprises a particle accumulator and a filter element, according to another aspect of the present disclosure.
    Fig. 6A is a cross-sectional side view of the filter element of Fig. 5.
    Fig. 6B is an enlarged perspective view of a portion of the filter element shown in Figs. 5 and 6A.
    detailed description
    Certain aspects and features of the present disclosure relate to a filter assembly that includes a particle accumulator and a filter element. The filter assembly can prevent debris particles (or particles) from entering the floating equipment within a casing string. In some aspects, the particle accumulator and the filter element may be used in sand filtration applications. The particle accumulator and the filter element may be positioned within the casing string. In some aspects, the particle accumulator and the filter element may be positioned within a casing shoe of the casing string. The particle accumulator and the filter element may be coupled to the casing string at the well site, or in some aspects, one of the particle accumulator and the filter element or both may be coupled to a threaded tube replacement part ("replacement part"). The replacement part may be coupled to a casing tube of the casing string at the well site. The casing string may also comprise floating equipment, for example but not limited to a floating collar or a guide shoe.
    In some aspects, multiple sets of filters may be positioned in a series tubing string. The use of several sets of filters in series can improve the filtration of the fluid and can increase the amount of operating time of the filter sets.
    These illustrative examples are given to introduce the reader to the general object described herein and are not intended to limit the scope of the concepts described. The following sections describe various features and additional examples with reference to the drawings in which similar numbers indicate similar elements, and informative descriptions are used to describe the illustrative examples but, like the illustrative examples, should not be used to limit this disclosure.
    FIG. 1 is a schematic view of a well system 100 which comprises a filter assembly 102 positioned inside a production tube, for example a casing string 104. The filter assembly 102 may comprise a storage accumulator particles and a filter element. The tubing string 104 may extend from a surface 106 of a wellbore 108 into a subterranean formation. The tubing string 104 may operate in the wellbore 108 to protect or isolate formations adjacent to the wellbore 108. The tubing string 104 may be comprised of a plurality of casing tubes 110 that may be coupled to the surface 106. and positioned within the wellbore 108.
    The casing string 104 may comprise a casing shoe 112. In some aspects, the casing shoe 112 may be a guide shoe or a floating shoe. The casing shoe 112 may assist in guiding the casing string 104 when positioned within the wellbore 108. The filter assembly 102 may be positioned within the casing string 104, for example at Above the casing shoe 112. In some aspects, the filter assembly 102 may be positioned elsewhere in the casing string 104, for example, but not limited to the casing shoe 112.
    The casing string 104 may comprise a floating equipment 114, for example but not limited to a floating collar or a guide shoe. Floating equipment 114 may be used during cementation of wellbore 108. Floating equipment 114 may include valves that may become totally or partially plugged by debris particles that enter casing string 104. Floating equipment 114 may not function properly when the valves are fully or partially clogged. The cementation of the wellbore 108 may be weak or otherwise fail to function properly when the floating equipment 114 is not operating properly or when the cement is contaminated with debris. The filter assembly 102 can filter debris particles from the fluid that enters the casing string 104. The filter assembly 102 can prevent the particles from entering the casing string 104 and partially or completely blocking the valves of the casing string 104. In some aspects, the filter assembly 102 may also prevent the debris particles from passing through the casing shoe 112 and blocking a valve of the casing shoe 112. In some aspects, the filter assembly 102 may be used to filter sand or other particles from the production fluid.
    Fig. 2A shows a centrifuge 200, one or more centrifuges 200 may form a particle accumulator of the filter assembly 102. The particle accumulator may be within a range of about 1 foot (about 30.5 cm) about 6 feet (about 183 cm) and may consist of one or more centrifuges. Filter assembly 102 may also include a filter element that can prevent particles accumulated by centrifuge 200 from flowing through the filter element. Figures 4 to 6 show two examples of filter elements that may be used in conjunction with the centrifuge 200, although other suitable filter elements may be used. The centrifuge 200 may have a maximum width that may be approximately equal to an inside diameter of the casing string 104. In some aspects, the centrifuge 200 may be assembled from several pieces. For example, the centrifuge 200 may be assembled from a plurality of blades 202. In some aspects, the centrifuge 200 may be fabricated as a single piece. The blades 202 can be divided into pieces by slots 204. The slots 204 can be eccentric slots (e.g. arcuate slots that do not intersect). The blade parts 202 can be coupled by any suitable fastening mechanism. For example, a bar may extend inside the blade 202, with each portion of the blade 202 to which it is coupled. In some aspects, a bar may extend along a surface of the blade 202 that is not in contact with the fluid, and the parts constituting the blade 202 may be coupled to the bar via fasteners, by example of screws. In some aspects, slots 204 may pass from slots (e.g. apertures) to grooves (e.g., a recess that does not completely divide pad 202 into separate pieces) along the length of slot 204, so that the slots 204 do not divide the blade 202 into separate pieces.
    Slots 204 may have a width. The width of the slots 204 may range from about 0.1 mm to about 0.5 mm, although other suitable widths may be used in some aspects. The width of the slots 204 may be determined based on characteristics of the well in which the centrifuge 200 will be used, for example but not limited to the size range of the debris particles found in the well. The slots 204 may all be the same width, or in some aspects, the width of the slots 204 may vary. The blades 202 may have an outer edge 206 which includes a groove 208. Some of the slots 204 of each blade 202 may intersect with the groove 208 of the blade 202.
    Slots 204 can capture debris particles suspended in a fluid passing through centrifuge 200 which are wider than the width of slots 204. Particles stopped by slots 204 can be pushed along the length of slots 204 through the fluid passing over the surface of the blades 202 along the length of the slots 204. The particles may be pushed along the slots 204 until the slots 204 terminate at the groove 208 where the particles are deposited. The particles captured by the slots 204 can accumulate in the grooves 208 in the outer edges 206 of the blades 202. The longer the lengths of the slots 204 are (for example, the longer the length of the centrifuge is), the more the accumulation particles in the grooves 208 may be effective. The centrifuge may be of a forable material, for example but not limited to a composite, a phenolic, aluminum or other suitable forable material.
    Figure 2B shows a blade 202 of the centrifuge 200. The blade 202 may be coupled to additional blades 202 to form the centrifuge 200.
    The blades 202 can be coupled around a central axis via coupling elements. Figure 2C shows an enlarged view of the coupling elements. The coupling elements may be a concave portion 210 and a convex portion 212. The concave portion 210 may be generally vertical. The convex portion 212 may be generally vertical, so as to mate with the concave portion 210. As shown in Figures 2B-2C, the concave portion 210 may generally have an arrow shape and the corresponding convex portion 212 may have an generally corresponding arrow shape. In some aspects, the coupling elements may have other suitable shapes, for example rectangular or triangular. The convex portion 212 of a blade 202 can fit inside the concave portion 210 of another blade 202. Several countries 202 can be coupled via these coupling elements.
    The blade 202 may comprise a raised element or protuberance, for example a column 214, on a first surface of the pay 202. The blade 202 may also include a corresponding recess (not shown) for receiving the raised element on a second surface In some aspects, the first surface may be the upper surface of the blade 202 and the second surface may be the lower surface of the blade 202. The column 214 may be of generally circular shape, even if other Suitable shapes may be used. The recess may be shaped to receive or mate with column 214. Column 214 of one blade 202 may be positioned within the recess of another blade 202, coupling thus the two blades 202 in a linear direction (for example, vertically or horizontally). In some aspects, other suitable coupling elements may be used to vertically couple two blades 202.
    Fig. 2D shows four blades 202 coupled to form centrifuge 200 of Fig. 2A via their respective coupling elements, convex portions 212 and concave portions 210. In some aspects, blades 202 can be coupled via other elements. suitable coupling means or may be coupled by other suitable means, for example, but not limited to appropriate fixations, adhesives, or other permanent or semi-permanent means. The length of the leaves 202 may vary according to the characteristics of the well in which the centrifuge 200 will be used. While FIGS. 2A-2D show four blades 202 being coupled to form the centrifuge 200, in some aspects, more or less blades may be used to form the centrifuge 200. As described in connection with FIGS. 2C-2D, a centrifuge Additional can be vertically coupled to the centrifuge 200 by coupling the column 214 on each blade 202 to the recess on each blade 202 of the additional centrifuge.
    Figure 3 shows an aspect of the disclosure in which a centrifuge, for example the centrifuge 200, is coupled to a second centrifuge, for example an additional centrifuge 200B. The centrifuge 200B may be identical to the centrifuge 200. The centrifuge 200 and the centrifuge 200B may be coupled to form a particle accumulator 300 for use in the filter assembly 102. Some of the slots 204 in the centrifuge 200 may end at groove 208 at the outer edge 206 of the blades 202. Other slots of the slots 204 in the centrifuge 200 may terminate at a point which aligns with the beginning of the slots 204B of the additional centrifuge. 200B, as shown in the transition region 218. As shown, the slots 204 of the centrifuge 200 can align with the slots 204B of the additional centrifuge 200B. The slots 204, 204B may continue along a length of the blades 202, 202B until the slots 204, 204B finally terminate at a groove 208B, as shown, for example, in the termination region 224.
    The particles stopped by the slots 204 of the centrifuge 200 can be pushed along the length of the slots 204 until the slots 204 terminate in one of the grooves 208 of the blades 202. The particles stopped by the slots 204 can also circulate along the slots 204 until the slots 204 meet the slots 204B of the additional centrifuge 200B. The particles can then flow along the length of the slots 204B until the slots 204B terminate in the grooves 208B at the outer edges 206B of the additional centrifuge 200B. Some particles can be stopped by the slots 204B and can flow along the length of the slots 204B until they reach the groove 208B.
    While Figure 3 shows two centrifuges 200, 200B coupled, in some aspects, additional centrifuges may be coupled for use as a particle accumulator in the filter assembly 102. A longer particle accumulator can more efficiently accumulate particles. debris in its grooves that a shorter particle accumulator.
    Fig. 4 shows a filter assembly 400 which comprises a particle accumulator 401 and a discharge apparatus 402. The particle accumulator 401 may be comprised of four coupled centrifuges 200. The filter assembly 400 may be positioned within a casing string 404. The casing string 404 may be positioned within a wellbore 405. The casing string 404 may be a casing replacement. The replacement part may be threaded onto a casing tube at the well site. In some aspects, one or more portions of the filter assembly 400 may be positioned within the casing string 404 at the well site. The casing string 404 may be part of a casing shoe.
    While the particle accumulator 401 comprises four coupled centrifuges 200, in some aspects more or fewer centrifuges 200 may be used. The width of the particle accumulator 401 may correspond to an inside diameter 408 of the casing string 404. The outer edge 206 of each of the centrifuges 200 may be spaced close to an inner surface 410 of the tubing string 404. In some aspects, the outer edge 206 may contact the inner surface 410 of the casing string.
    A nose 412 may be coupled to one end of the tubing string 404. The nose 412 may have a maximum outer diameter 414 which may be slightly less than an inside diameter of the wellbore 405. The nose 412 may push fluid into the train casing 404 rather than a ring 416 between the tubing string 404 and the wellbore 405. The maximum outer diameter 414 of the nose 412 can be selected based on the particular well into which it will be used. In some aspects, the maximum outside diameter 414 of the nose 412 may be approximately equal to an outside diameter of the casing string 404. In some aspects, the nose 412, the particle accumulator 401, and the discharge apparatus 402 may be mated inside a replacement part. In some aspects, one or more of the nose members 412, the particle accumulator 401, and the discharge apparatus 402 may be coupled within the replacement part. In some aspects, one or more of the nose members 412, the particle accumulator 401, and the discharge apparatus 402 may be coupled to the casing string 404 at the well site.
    As the fluid enters the tubing string 404, a portion of the fluid may pass through the slots 204 of the particle accumulator 401. Part of the fluid may flow along the surface of the blades 202 of the fluid. particle accumulator 401. The fluid may comprise particles of debris (and other particles). Slots 204 may act as a filter. The slots 204 can stop particles having a width greater than the width of the slots 204. Part of the fluid flowing along the length of the slots 204 and the surface or blades 202 can push the arrested particles to the slots 204 along the length of the slots 204. The slots 204 may act as rails and the particles may be pushed along the length of the slots 204 by the fluid flowing along the surface of the blade 202. The particles may be pushed along the length of the slots 204 until the respective slot ends at the groove 208. The particles may accumulate in the groove 208 at the outer edge 206 of each of the lands 202. The particles can be pushed along the length of the groove 208 by the fluid flow.
    An end 418 of the particle accumulator 401 may be positioned near the discharge apparatus 402. The discharge apparatus 402 may include a baffle 420 and a valve 422. The discharge apparatus 402 may be comprised of a forable material, for example but not limited to a composite, a phenolic, aluminum or other suitable forable material. The baffle 420 may extend from the tubing string 404 into the casing string 404. The baffle 420 may be in contact with or positioned near the end 418 of the particle accumulator 401. tubing string 404, deflector 420, and particle accumulator 401 may together create a cavity 424. Cavity 424 may have a maximum width 426 which may be in the range of about 5% to about 15% of diameter. 408 of the casing string 404. The maximum width 426 of the cavity 424 may be selected based on various characteristics of the well, the casing string 404, the size of the valve 422, and the particle accumulator 401. For example, in some aspects, a particle accumulator having a plurality of centrifuges (and thus increased length) can more efficiently collect debris particles near the inner surface 410 of the train. 404 casing a particle accumulator having few centrifuges. A longer particle accumulator can be used with a baffle which has a smaller maximum diameter compared to a shorter particle accumulator.
    The valve 422 may extend between the inner surface 410 of the casing string 404 and an outer surface of the casing string 404. The valve 422 may allow fluid communication between the cavity 424 and the ring 416. The valve 422 may be a check valve which allows fluid and debris particles to flow from the cavity 424 into the ring 416. The valve 422 may be a one-way valve which does not allow the fluid and particles to flow from the ring 416 in the cavity 424.
    The groove 208 of the particle accumulator 401 may terminate at or near the cavity 316. The debris particles and the fluid flowing along the length of the groove 208 may be pushed into the cavity 424 by the flow of fluid. The fluid and particles may accumulate in the cavity 424. The fluid and particles may be pushed through the valve 422 into the ring 416 when there is sufficient back pressure (or pressure) to the Inside the cavity 424. The back pressure required to push the fluid and the particles through the valve 422 into the ring 416 may be based on the maximum width 426 of the cavity 424.
    In some aspects, a plurality of filter assemblies 400 may be positioned within the casing string 404. The filter assemblies 400 may be serially positioned within the casing string 404. The inside diameter of the baffle of each set The filter 400 may increase between the filter sets 400 positioned at the bottom of the well relative to the other filter sets 400. The different inside diameters of each baffle may allow the various deflectors to collect debris particles of different sizes and different percentages of the particles. debris particles present in the fluid flowing through the casing string 404. Similarly, the particle accumulators positioned near the nose of the casing string 404 may have slots which have a larger width compared to the particle accumulators. positioned at the top of wells. Filtration of debris particles from the fluid can be more efficient by positioning filter assemblies 400 in series. The number of filter sets 400 included in the casing string 404 can be determined based on well characteristics, downhole conditions, the efficiency of the desired filtration process, and other factors.
    Fig. 5 shows a filter assembly 500 which comprises the particle accumulator 401 and a filter element, for example a slit filter 502. The filter assembly 500 can be positioned within a tubing string 504. In some aspects, the tubing string 504 may be a replacement piece which may be threaded on a casing tube. In some aspects, casing string 504 may be part of a casing shoe. The slit filter 502 may be positioned at the top of the well relative to the particle accumulator 401. The slit filter 502 may consist of a forable material, for example but not limited to a composite, a phenolic, aluminum or other suitable drilling material.
    As fluid enters the tubing string 504, a portion of the fluid may pass through the slots 204 of the particle accumulator 401. As described above, for example in connection with FIGS. 2A through 4, the slots 204 may stop particles having a width greater than the width of the slots 204. The particles may be pushed along the length of the slots 204 and in the groove 208 at the outer edge 206 of each of the blades 202. The particles may be pushed along the length of the groove 208 by the fluid flow. The particles can exit the groove 208 at an end 418 of the particle accumulator 401.
    The slit filter 502 may be of generally circular shape and may define an aperture 503. The slit filter 502 may have an outer diameter 506 which may be approximately equal to an inner diameter 508 of the tubing string 504. The slit filter 502 may have a width 510 which may range from about 5% to about 15% of the inside diameter 508 of the casing string 504. The slit filter 502 may comprise a plurality of filter chambers defined by inclined blades 512, such as described in more detail in FIGS. 6A to 6B. The inclined blades 512 may define filtration slots 514. The filter slots 514 may have a width. The width of the filter slots 514 may be in a range of about 0.1 mm to about 0.5 mm, even though filter slots of smaller or larger size 514 may be used. While the particles and the particulate-laden fluid exit the groove 208 of the particle accumulator 401, they can enter the filter chambers of the slit filter 502. The particles which have a width greater than the width of the slits of Filtration 514 can be stopped by filtration slots 514. Fluid and smaller particles can flow through slit filter slots 502. The debris particles can accumulate in the corners of the filtration chambers. The region of the filter slots 514 near the downhole side of the slit filter 502 may remain free of particles. The fluid can continue to flow through the uncapped region of the filtration slots 514. The slit filter 502 can be rinsed off the collected particles by pushing the fluid into the tubing string 504 from the surface of the wellbore or from a well top position to the slot filter 502. The debris particles accumulated in the slot filter 502 can be expelled from the casing string 504 via the casing shoe. The useful life of the slot filter 502 can be extended in this way.
    In some aspects, a plurality of filter assemblies 500 may be positioned within the casing string 504. The width of the slots of the lowest-lying particle accumulator at the bottom of the well may be smaller than the width of the slots of the casing. an additional particle accumulator positioned further up the well. In some aspects, the slit filter slot width of the filter assembly positioned lower downhole may also be smaller than the slit filter slot width of the filter assembly positioned further up the well. In other words, several sets of filters can be serially positioned within the casing string 504. The size of the slot (e.g. slot width) of the lowest particle accumulator bottom of the well may be smaller than the slots of a particle accumulator positioned further up the well. Similarly, the width of the slit filter slots of the lower filter assembly downhole may be smaller than the slots of a slit filter of a filter assembly positioned further up the well. The number of filter assemblies 500 positioned within the casing string 504 can be determined based on well characteristics, downhole conditions, the efficiency of the desired filtration process, and others. factors.
    FIG. 6A shows a cross-sectional perspective view of slit filter 502 and casing string 504. Slotted filter 502 may include side walls 516 and rear wall 518. Side walls 516 and rear wall 518 may comprising the sloping blades 512 which define the filtration slots 514. The rear wall 518 may extend circumferentially around the slot filter 502. As shown in FIG. 6B, which shows a single filtration chamber 520, the side walls 516 and the rear wall 518, and a lower surface 519 define a filtration chamber 520. The filter slots 514 of the side walls 516 may be inclined towards the lower surface 519. The side walls 516 may be positioned generally perpendicular to the rear wall 518 to define filtration chambers of generally rectangular shape 520. In some aspects, the side walls 516 may be positioned at other angles with respect to the back wall 518. In some aspects, the inclined lands 512 may be curved. The side walls 516 and the rear wall 518 may include filter slots 514. The bottom surface 519 may be a solid material without filtration slots 514. In some aspects, the bottom surface 519 may include perforations or filtration slots 514 .
    An open end of the filtration chambers 520 may be positioned downhole as shown in FIG. 6A. In some aspects, the open end may be positioned at the top of the well. The particle-laden fluid accumulated by the particle accumulator 401 can exit the particle accumulator 401 and enter the open ends of the filter chambers 520 of the slit filter 502. The fluid and the smaller particles can flow. through the filtration slots 514 of the side walls 516 and the rear wall 518. The particles in the particle-laden fluid which are wider than the width of the filter slots 514 of the slit filter 502 are stopped by the filter slots 514 of the side walls 516 and the rear wall 518.
    Part of the fluid may pass through the sidewalls 516 of the filtration chambers 520. Part of the fluid may pass through the rear wall 518 of the slit filter 502. Part of the fluid may flow along the length of the sidewalls 516 of the slot filter 502 to the rear wall 518. The particles stopped at the side walls 516 of the slot filter 502 can be pushed towards the rear wall 518 of the slot filter 502 by the fluid flowing along the length. 516. The particles can accumulate when the rear wall 518 and the side walls 516 intersect. The region of the sidewalls 516 near the open end of the slit filter 502 can remain unobstructed by particles. The fluid can continue to flow through the filter slots 514 of the side walls 516. The fluid can also continue to flow through the filter slots 514 of the rear wall 518 which is not in proximity to the filter. where the rear wall 518 and the side walls 516 intersect. The slot filter 502 can filter the particles of the fluid for a longer period of time by collecting the particles near the region where the side walls 516 intersect the rear wall 518. The region of the filter slots 514 of the rear wall 518 which are not near the sidewalls 516 can remain unobstructed. In addition, fluid may flow between the filtration chambers 520 through the filter slots 514 of the side walls 516. Fluid may flow through the filter slots 514 of the side walls 516 of a filtration chamber 520 filled with debris to a different filtration chamber 520 which can not be filled with debris.
    Example 1: An apparatus may include a first curved blade for use in a centrifuge to collect debris particles in a fluid flowing through the centrifuge. The curved blade may further comprise a plurality of eccentric slots and a groove. The groove may be positioned at an outer edge of the curved blade. The curved blade may also comprise a first coupling element and a second coupling element. The first and second coupling members may be for coupling the first curved blade to a second curved blade about a central axis.
    Example 2: The apparatus of Example 1 may further be such that the second curved blade comprises a plurality of eccentric slots and a groove positioned at an outer edge of the second curved blade.
    Example 3: The apparatus of Example 1 or 2 may further be such that the first curved blade is further coupled to a third curved blade and a fourth blade curved about the central axis to form the centrifuge.
    Example 4: Any of the apparatus of Examples 1 to 3 may further comprise a protrusion on a surface of the first curved blade. The apparatus may further include a recess on a second surface of the curved blade for coupling the first curved blade to an additional curved blade. The first curved blade can be coupled to the additional curved blade in a linear direction.
    Example 5: The apparatus of Example 4 may be such that a slot of the plurality of eccentric slots of the first curved blade intersects an eccentric slot of the additional curved blade.
    Example 6: The apparatus of any of Examples 1 to 5 may be such that a slot of the plurality of eccentric slots intersects the groove.
    Example 7: An assembly may include a baffle extending inwardly from a casing string. The deflector may extend along a length of the casing string. The assembly may also comprise a cavity defined by the baffle and the tubing string. The cavity may be designed to receive debris particles accumulated by a centrifuge positioned near the deflector. The assembly may include a valve extending between an inner surface of the casing string and an outer surface of the casing string. The valve may be in fluid communication with the cavity.
    Example 8: The assembly of Example 7 may be such that the baffle is positionable near one end of the centrifuge. The centrifuge may comprise a plurality of blades. Each of the plurality of blades may have slits that do not intersect to filter debris particles from a fluid flowing through the centrifuge. The centrifuge may also include a groove on an outer edge of each of the plurality of blades. The groove may be for accumulating the filtered debris particles of the fluid flowing through the centrifuge.
    Example 9: The assembly of Example 8 may be such that the slots that do not intersect have a width in a range of about 0.1 mm to about 0.5 mm.
    Example 10: Any of the sets of Examples 7 to 9 may be such that the valve is a one-way valve for ejecting the debris particles from the cavity into a ring between the casing string and a wellbore in response to a pressure in the cavity exceeding a predefined maximum.
    Example 11: Any of the sets of Examples 7 to 10 may be such that the cavity has a maximum width which is within a range of about 5% to about 15% of an inside diameter of the casing string.
    Example 12: Any of the sets of Examples 7 to 11 may be such that the centrifuge has a length in a range of about 1 foot (about 30.5 cm) to about 6 feet (about 183 cm) .
    Example 13: Any of the sets of Examples 7 to 12 may be such that the centrifuge is made of a drillable material.
    Example 14: An assembly may comprise a slot filter of generally circular shape and positionable within a casing string. The slit filter may include a plurality of filter chambers. Each of the plurality of filter chambers may comprise a rear wall, side walls that intersect the rear wall, slots in the rear wall and side walls, a bottom surface, and an open end. The open end may be positionable near a centrifuge in the casing string to receive a fluid containing debris particles collected by the centrifuge.
    Example 15: The assembly of Example 14 may be such that the bottom surface is a solid surface without any slits.
    Example 16: Any of the sets of Examples 14 to 15 may be such that the slits have a width in a range of about 0.1 mm to about 0.5 mm.
    Example 17: Any of the sets of Examples 14 to 16 may be such that the slit filter comprises a drillable material.
    Example 18: Any of the sets of Examples 14 to 17 may be such that the centrifuge comprises a plurality of blades. Each of the plurality of blades may have slits that do not intersect to filter debris particles from a fluid flowing through the centrifuge. The centrifuge may also include a groove on an outer edge of each blade of the plurality of blades to collect filtered debris particles from the fluid flowing through the centrifuge.
    Example 19: Any of the sets of Examples 14 to 18 may be such that the sidewall slots are inclined toward the bottom surface to direct the debris particles toward the lower surface of the filtration chamber.
    Example 20: Any of the sets of Examples 14 to 19 may be such that the slit filter has a width which may range from about 5% to about 15% of an inside diameter of the casing string .
    Example 21: A curved blade may comprise any one or more of the blade characteristics defined in any of Examples 1 to 6, 8 and 18.
    Example 22: A centrifuge may comprise a plurality of blades according to Example 21.
    Example 23: Any of the sets of Examples 7 to 20 may be such that the centrifuge is a centrifuge according to Example 22.
    The foregoing aspects, including the illustrated aspects, have been presented solely for purposes of illustration and description and are not intended to be exhaustive or to limit the disclosure to the precise forms described. Many modifications, adaptations, and uses thereof will be obvious to those skilled in the art without departing from the scope of the disclosure.
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    claims
    Apparatus characterized in that it comprises: a first blade (202) curved for use in a centrifuge (200) for collecting debris particles in a fluid flowing through the centrifuge (200), the blade ( 202) comprising: a plurality of eccentric slots (204); a groove (208) positioned at an outer edge (206) of the curved blade (202); a first coupling member (210) and a second coupling member (212) for coupling the first curved blade (202) to a second blade (202) curved around a central axis.
    [2" id="c-fr-0002]
    An apparatus according to claim 1, wherein the second curved blade comprises a plurality of eccentric slots (204) and a groove (208) positioned at an outer edge (206) of the second curved blade (202).
    [3" id="c-fr-0003]
    An apparatus according to claim 1 or 2, wherein the first curved blade (202) is further coupled to a third curved blade (202) and a fourth blade (202) curved about the central axis to form the centrifuge (200).
    [4" id="c-fr-0004]
    Apparatus according to any one of claims 1 to 3, further comprising: a protuberance (214) on a surface of the first curved blade (202); and a recess on a second surface of the curved blade (202) for coupling the first curved blade to an additional curved blade (202) in a linear direction.
    [5" id="c-fr-0005]
    An apparatus according to claim 4, wherein a slot of the plurality of eccentric slots (204) of the first curved blade (202) intersects an eccentric slot of the additional curved blade (202).
    [6" id="c-fr-0006]
    Apparatus according to any one of claims 1 to 5, wherein a slot of the plurality of eccentric slots (204) intersects the groove (208).
    [7" id="c-fr-0007]
    An assembly characterized in that it comprises: a deflector (420) extending inwardly from a casing string (104, 404) and extending along a length of the casing string (104, 404); a cavity (424) defined by the deflector (420) and the casing string (104, 404), the cavity being adapted to receive debris particles accumulated by a centrifuge (200) positioned near the deflector (420); and a valve (422) extending between an inner surface (410) of the casing string (104, 404) and an outer surface of the casing string (104, 404), the valve (422) being in fluid communication with the casing string (104, 404). cavity (424).
    [8" id="c-fr-0008]
    The assembly of claim 7, wherein the baffle (420) is positionable near an end of the centrifuge (200), the centrifuge (200) comprising: a plurality of blades (202), each of the plurality of blades (202) having slots (204) which do not intersect to filter debris particles from a fluid flowing through the centrifuge (200); and a groove (208) on an outer edge (206) of each of the plurality of blades (202) for accumulating the filtered debris particles of the fluid flowing through the centrifuge (200).
    [9" id="c-fr-0009]
    The assembly of claim 8, wherein the slots (204) that do not intersect have a width in a range of about 0.1 mm to about 0.5 mm.
    [10" id="c-fr-0010]
    An assembly according to any of claims 7 to 9, wherein the valve (422) is a one-way valve for ejecting debris particles from the cavity (424) into a ring (416) between the casing string (104). , 404) and a wellbore (108, 405) in response to a pressure in the cavity (424) exceeding a predefined maximum.
    [11" id="c-fr-0011]
    An assembly according to any one of claims 7 to 10, wherein the cavity (424) has a maximum width (426) in the range of about 5% to about 15% of an inside diameter (408). ) of the tubing string (104, 404).
    [12" id="c-fr-0012]
    The assembly of any one of claims 7 to 11, wherein the centrifuge (200) has a length in a range of about 30.5 cm to about 183 cm.
    [13" id="c-fr-0013]
    An assembly according to any one of claims 7 to 12, wherein the centrifuge (200) is made of a drillable material.
    [14" id="c-fr-0014]
    14. An assembly characterized in that it comprises: a slot filter (502) of generally circular shape and positionable inside a casing string (104, 504), the slot filter (502) comprising a plurality of chambers filtration apparatus, each of the plurality of filter chambers (520) comprising: a back wall (518); side walls (516) which intersect the rear wall (518); slots (514) in the rear wall (518) and the side walls (516); a lower surface (519); and an open end positionable near a centrifuge (200) in the casing string (104, 504) for receiving a fluid containing debris particles collected by the centrifuge (200).
    [15" id="c-fr-0015]
    The assembly of claim 14, wherein the bottom surface (519) is a solid surface without any slits.
    [16" id="c-fr-0016]
    The assembly of claim 14 or 15, wherein the slits (514) have a width in a range of about 0.1 mm to about 0.5 mm.
    [17" id="c-fr-0017]
    An assembly according to any of claims 14 to 16, wherein the slit filter (502) comprises a drillable material.
    [18" id="c-fr-0018]
    An assembly according to any one of claims 14 to 17, wherein the centrifuge (200) comprises: a plurality of blades (202), each of the plurality of blades having slots (204) which do not intersect to filter particles of debris from a fluid flowing through the centrifuge; and a groove (208) on an outer edge (206) of each of the plurality of blades for collecting the filtered debris particles from the fluid flowing through the centrifuge (200).
    [19" id="c-fr-0019]
    An assembly according to any one of claims 14 to 18, wherein the slots (514) of the side walls (516) are inclined toward the bottom surface (519) for directing the debris particles towards the bottom surface of the chamber filtration (520).
    [20" id="c-fr-0020]
    The assembly of any one of claims 14 to 19, wherein the slit filter (502) has a width that can be in a range of about 5% to about 15% of an inner diameter (508). the tubing string (104, 504).
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    同族专利:
    公开号 | 公开日
    US20190106966A1|2019-04-11|
    US10125579B2|2018-11-13|
    US20170211358A1|2017-07-27|
    CA2989999A1|2017-02-02|
    US20180363426A1|2018-12-20|
    US10815760B2|2020-10-27|
    US10233731B2|2019-03-19|
    GB201719366D0|2018-01-03|
    US10233730B2|2019-03-19|
    CA3043432A1|2017-02-02|
    AU2015403349A1|2017-12-07|
    NO20171894A1|2017-11-27|
    GB2555288A|2018-04-25|
    US20180363427A1|2018-12-20|
    WO2017019007A1|2017-02-02|
    AU2015403349B2|2020-07-23|
    GB2555288B|2021-02-24|
    CA2989999C|2019-07-09|
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    法律状态:
    2017-04-12| PLFP| Fee payment|Year of fee payment: 2 |
    2018-04-25| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-29| PLSC| Search report ready|Effective date: 20180629 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/US2015/042191|WO2017019007A1|2015-07-27|2015-07-27|Centrifugal particle accumulator and filter|
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