An apparatus, method and system for filtering particulates from a fluid stream in an oil wellbore

Abstract

The present invention discloses an apparatus (200), method and a system for filtering particulates from a fluid stream. A housing (202) is positioned below a pump (204) in a wellbore with a first opening (206) and a second opening (208). The first opening (206) is structured to receive the fluid stream from the well bore. A filtering assembly (210) is connected to the pump (204) positioned in an uphole portion of the well bore. The filtering assembly (210) is configured to filter out the particulates from the fluid stream received from the housing (202). The housing (202) is positioned relative to the filtering assembly (210) such that the filtered particles are accumulated in the housing (202) through the second opening (208) and the filtered fluid stream is received by the pump (204).

Description

AN APPARATUS, METHOD AND SYSTEM FOR FILTERING PARTICULATES FROM A FLUID STREAM IN AN OIL WELLBORETechnical field:

[0001] The present invention relates to an apparatus, method and system for filtering particulates from a fluid stream in wellbores, more particularly relates to filtration of sand in an oil wellbore and separation of a portion of gas from liquid inside the wellbore.Background:

[0002] In conventional oil extraction plants, oil and gas are extracted from the underground fluid stream using pumps. In these underground fluid streams, unwanted particulates also exist mixed with the oil. One such particulate may be sand which during the extraction of oil, accumulate in the passage of fluid stream, and over time, obstruct or block the pathway for the fluid stream from the source to the pump, thereby reducing the efficiency of the plant. For maintenance and to keep the plant operational, frequent shutdowns are required which lead to significant scaling down in the production of oil and in turn reducing the productivity of the plant and / or wellbore.Summary:

[0003] In accordance with a first aspect of the present invention, there is provided an apparatus for filtering particulates from a fluid stream in an oil wellbore. The apparatus comprises a housing positioned below a pump with a first opening structured to receive the fluid stream from the wellbore and a second opening. A filtering assembly, connected to the pump in an uphole portion of the wellbore, efficiently filters out particulates from the fluid stream received from the housing. The positioning of the housing relative to the filtering assembly facilitates the accumulation of filtered particles through the second opening. Simultaneously, the filtered fluid stream is directed seamlessly to the pump, contributing to improved operational performance and extended equipment lifespan.

[0004] In some exemplary embodiments, the apparatus further includes a tube positioned in the second opening of the housing, providing a directed path for the fluid stream towards the filtering assembly. The additional feature of the tube positioned in the second opening enhances the functionality of the apparatus by ensuring an efficient flow of the fluid stream, optimizing the filtering process. The incorporation of thetube improves the overall design, contributing to enhanced fluid dynamics within the apparatus, and consequently, improving its performance in filtering particulates from the incoming fluid stream.

[0005] In some exemplary embodiments of the present invention, the apparatus further comprises an adjustable tube within the housing, allowing for variation in length. The adjustable tube facilitates the customization of the capacity of the housing, providing adaptability to different operational demands. The adjustable feature enables users to optimize the apparatus based on specific wellbore conditions and fluid stream characteristics.

[0006] In some exemplary embodiments of the present invention, the tube is designed to be removable from the housing. The tube being removable facilitates straightforward maintenance, cleaning, or replacement without the need for extensive disassembly.

[0007] In some exemplary embodiments of the present invention, the tube is positioned eccentrically within the housing to enhance the flow dynamics of the fluid stream. The eccentric configuration of the tube promotes a more efficient and effective filtration process by optimizing the interaction between the fluid stream and the filtering assembly.

[0008] In some exemplary embodiments of the present invention, the tube is movably connected with a sliding side door, allowing for the adjustment of its length within the housing. The movability of the tube enables operators to conveniently modify the length of the tube in the housing based on specific operational requirements. The interaction with the sliding side door facilitates ease of adjustment, ensuring flexibility in configuring the apparatus for varying fluid stream conditions.

[0009] In some exemplary embodiments of the present invention, the filtering assembly is a sand screen integrated into the apparatus. The incorporation of a sand screen ensures the reliable separation of undesirable particles, contributing to the overall effectiveness and longevity of the apparatus in wellbore applications.

[0010] In some exemplary embodiments of the present invention, the housing includes a plurality of perforations forming the first opening, designed to release gas received with the fluid stream from the housing. The plurality of perforations facilitates the efficient separation and expulsion of gas, enhancing the overall functionality of the apparatus. The incorporation of perforations in the housing optimizes the gas release process, contributing to the improved performance and reliability of the apparatus in handling fluid streams within wellbores.

[0011] In accordance with a second aspect of the present invention, there is provided a method for filtering particulates from a fluid stream. The method involves receiving a fluid stream through a firstopening in a housing positioned below a pump in a wellbore. A filtering assembly, connected to the pump in an uphole portion of the wellbore, filters out particulates from the fluid stream received from the housing. The housing is positioned relative to the filtering assembly, allowing filtered particles to accumulate in the housing through a second opening. The configuration of the housing the filtering assembly as described above reduces the risk of clogging, ensuring prolonged operational efficiency. Finally, the pump receives the filtered fluid stream from the filtering assembly, contributing to the overall effectiveness of the filtration process.

[0012] In some exemplary embodiments of the present invention, the method further includes filtering the fluid stream by receiving it through a tube positioned eccentrically in the housing. The tube, situated in the second opening of the housing, allows efficient flow of the fluid stream towards the filtering assembly. Moreover, the method involves removing the tube from the housing, providing ease of maintenance and replacement when necessary. The removal of the tube enhances the adaptability and maintenance efficiency of the filtration system.

[0013] In some exemplary embodiments of the present invention, the method further involves receiving the fluid stream by the housing, wherein the capacity of the housing is varied by adjusting the length of a tube. The tube is movably connected to a sliding side door, allowing flexibility in controlling the capacity of the filtration system. The adjustable feature enables customization based on operational requirements, contributing to the versatility and adaptability of the filtration method.

[0014] In some exemplary embodiments of the present invention, the method further involves releasing gas received with the fluid stream from the housing. The releasing of gas is achieved through a plurality of perforations forming a first opening in the housing. The perforations facilitate the efficient release of gas, preventing its accumulation within the housing. The design feature of perforations ensures smooth fluid flow and prevents potential blockages, enhancing the overall effectiveness of the filtration process.

[0015] In accordance with a third aspect of the present invention, there is provided a system for filtering particulates from a fluid stream. The system comprises a pump positioned in an uphole portion of a well bore, a housing located below the pump, and a filtering assembly connected to the pump. The housing features a first opening structured to receive the fluid stream from the well bore and a second opening. The filtering assembly is configured to filter out particulates from the fluid stream received from the housing. The housing is positioned relative to the filtering assembly to ensure the accumulation of filtered particles through the second opening, allowing the filtered fluid stream to be efficiently received by the pump. Thepositioning of the housing relative to the tube facilitates a streamlined filtering process, enhancing the overall efficiency of particulate removal from the fluid stream.

[0016] In some exemplary embodiments of the present invention, the system features a pump mounted on a pump setting nipple, enhancing stability and positioning within the well bore. The configuration of mounting pump on pump setting nipple ensures a secure foundation for the pump, contributing to stable fluid extraction and preventing potential disruptions.

[0017] In some exemplary embodiments of the present invention, the system includes a pump mounted on an insert anchor, providing a stable and secure foundation for the pump. The specific anchoring method contributes to the overall stability and efficiency of the fluid extraction process by preventing unnecessary movement or displacement of the pump.

[0018] In some exemplary embodiments of the present invention, the system involves a housing with a tube positioned in the second opening to direct the fluid stream towards the filtering assembly. The positioning of the tube optimizes the fluid flow, ensuring a controlled and efficient filtration process and gas liquid separation.

[0019] In some exemplary embodiments of the present invention, the system includes a tube of adjustable length within the housing, allowing for the variation of housing capacity. The adjustable feature provides flexibility to adapt the system to different wellbore conditions and operational requirements, optimizing its overall performance.

[0020] In some exemplary embodiments of the present invention, the system includes a tube that is removable from the housing. The removable tube facilitates easy maintenance and replacement, ensuring the adaptability of the system and longevity by allowing swift removal and replacement of components.

[0021] In some exemplary embodiments of the present invention, the tube is eccentrically positioned in the housing to improve fluid stream flow. The eccentric placement of the tube in the housing enhances the efficiency of fluid movement, contributing to the overall effectiveness of the particulate filtering and separation process by promoting a more streamlined flow.

[0022] In some exemplary embodiments of the present invention, the system utilizes a tube movably connected with a sliding side door to adjust its length in the housing. The movability of the sliding side door allows for dynamic control over the fluid stream, optimizing the filtering process by adapting to changing conditions or requirements.

[0023] In some exemplary embodiments of the present invention, the system integrates a sand screen as the filtering assembly. The sand screen efficiently filters out particulates from the fluid stream,contributing to the overall cleanliness and reliability of the extracted fluids by preventing solid particles from entering the pump.

[0024] In some exemplary embodiments of the present invention, the system includes a housing with a plurality of perforations forming the first opening. The perforations release gas received with the fluid stream from the housing, maintaining a balanced and controlled extraction process. The advantage lies in preventing gas buildup, ensuring smooth fluid extraction and avoiding potential disruptions.Brief Description of Drawings:

[0025] The novel features and characteristics of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

[0026] FIG. 1 illustrates a cross sectional view of an oil wellbore with the filtration system, in accordance with an exemplary embodiment of the present invention.

[0027] FIG. 2 depicts a schematic view of a non-limiting example of a system for fluid stream with the pump mounted using a PSN.

[0028] FIG. 3 provides a schematic representation of a non-limiting example of a system designed for filtering particulates from a fluid stream with the pump mounted using an anchor mount.

[0029] FIG. 4 illustrates a non-limiting example of a particulate filtering system within a wellbore consisting of a sliding side door and with the pump mounted using a PSN.

[0030] FIG. 5 illustrates a non-limiting example of a particulate filtering system within a wellbore consisting of a sliding side door and with the pump mounted using an anchor mount.

[0031] FIG. 6 illustrates a non-limiting example of a particulate filtering system within a wellbore consisting of a sliding side door with a tube positioned eccentrically in a housing and with pump mounted using a PSN.

[0032] FIG. 7 illustrates a non-limiting example of a particulate filtering system within a wellbore consisting of a sliding side door with a tube positioned eccentrically in a housing and with the pump mounted using an anchor mount.

[0033] FIG. 8 illustrates a flowchart of a method for filtering particulates from a fluid stream in an oil wellbore, in accordance with an exemplary embodiment of the present invention.

[0034] FIG 9. illustrates a cross sectional view of an oil well bore with the filtration system performing the method of the present invention, in accordance with an exemplary embodiment of the present invention.

[0035] FIG 10. illustrates a graphical representation of experimental data of oil production rate for an oil well over a period of 9 months.

[0036] FIG 11. illustrates a graphical representation of experimental data of oil production rate for an oil well over a period of 2.5 years.

[0037] FIG 12. illustrates a graphical representation of experimental data about sustained production of oil in an oil well over a period of 9 months.

[0038] The figures depict embodiments of the invention for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.Reference Numerals:Description of component Reference Numeral(s)iratus for filtering particulates from a fluid streai 106, 200Housing 102, 202, 302, 402, 502, 602, 702, 902Pump 104, 204, 304, 404, 504, 604, 704, 904First opening 206, 906Second opening 208, 908Filtering assembly 110, 210, 310, 410, 510, 610, 710, 910Tube 212, 412, 512, 612, 712, 912Sliding Side door 214, 414, 514, 614, 714System 100, 900plurality of perforations 216Sand 922Oil 918Gas 920Detailed Description:

[0039] Detailed embodiments and implementations of the claimed subject matter are disclosed herein in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. It shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matter which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

[0040] An embodiment of the present invention discloses an apparatus, a method and a system for filtering particulates from a fluid stream. The fluid stream may include oil and gasses and additionally may include particulates, for example, sand that may get accumulated in the pathway of the fluid stream. The accumulation therefore may block the pathway of the fluid stream, which may impact the functioning of the plant.

[0041] FIG. 1 illustrates a cross sectional view of an oil wellbore with the filtration system, in accordance with an exemplary embodiment of the present invention. The wellbore, as shown in FIG 1, discloses a passage or pathway for the flow of the fluid stream from the source to the filtering system. The fluid stream may carry oil, gas and / or particulates such as sand. The system (100) or the filtration system may include an apparatus (106) or a filtering apparatus (106) and pump (104). The filtering apparatus (106) may include a filtering assembly (110) and a housing (102) such that the fluid stream from the pathway is received by the housing (102) and is filtered by the filtering assembly (108) connected to the pump (104).

[0042] FIG. 2 depicts a schematic view of a non-limiting example of a system for filtering particulates from a fluid stream. In one exemplary embodiment, the system includes a housing (202) with a first opening (206) and a second opening (208). The first opening (206) receives the fluid stream from the wellbore and the second opening (208) directs the fluid from the housing (202) to the pump (204).

[0043] The housing, also known as a sump, may act as a reservoir for collecting particulates such as sand and other solids, preventing potential damage to equipment by collecting solid particles produced during the pumping process. The integration of the housing within the system may contribute to the extended life of the pump.

[0044] In some exemplary embodiments of the present invention, the housing may include walls on all sides, forming a cuboidal structure. In some exemplary embodiments of the present invention, the housing may take the form of a cylindrical structure, closed at the bottom which may allow for accumulation of sand at the housing bottom.

[0045] In some exemplary embodiments of the present invention, the first opening (206) may be positioned on the side of housing (202) facing the downhole portion of the well. In some exemplary embodiments of the present invention, the first opening (206) may be located on the side that is next to the side facing the downhole portion of the structure. In some exemplary embodiments of the present invention, the first opening (206) may be positioned on the wall of the cylindrical shaped housing (202).

[0046] In some exemplary embodiments of the present invention, the second opening (208) may be positioned on the side of housing (202) facing the uphole portion of the well. In some exemplaryembodiments of the present invention, the second opening (208) may cover the entire portion of the housing (202) facing the uphole portion. In some exemplary embodiments of the present invention, the housing (202) may be provided with different dimensions. In other exemplary embodiments, the housing (202) may be provided with different alterations in materials, such as abrasion-resistant alloys or reinforced polymers.

[0047] In one of the exemplary embodiments of the present invention, the housing (202) may include a plurality of perforations (216) forming the first opening (206). These perforations (216) are designed to facilitate the controlled release of gas accompanying the fluid stream within the housing (202). In another exemplary embodiment of the present invention, the housing (202) may be connected to a perforated pup joint which may act as the first opening (206). In another exemplary embodiment of the present invention, the housing (202) may include a plurality of perforations forming the first opening (206) along the entire length of the side that is next to the side facing the downhole portion of the wellbore.

[0048] In another exemplary embodiment of the present invention, the housing (202) may include a plurality of perforations forming the first opening (206) along a portion of the entire length of the side that is next to the side facing the downhole portion of the wellbore. In some exemplary embodiments of the present invention, the portion of the side forming the first opening (206) may cover half the length of the entire side that is next to the side facing the downhole portion of the wellbore.

[0049] In one of the exemplary embodiments of the present invention, a perforated pup joint is a specialized component designed to enhance fluid flow within the wellbore. The short tubular section of the pup joint features a series of perforations or holes along its length, positioned to enable controlled gas release from the fluid stream. The perforated pup joint plays a role in gas-liquid separation by allowing gas to escape through the perforations while facilitating the continuous flow of fluid.

[0050] In general, a wellbore system faces challenges when gas accumulates, which may impede the efficient extraction of valuable fluids such as oil. Gas accumulation may disrupt the smooth flow of fluids within the wellbore, creating resistance and turbulence. The interference with fluid flow may lead to operational inefficiencies as it may reduce the overall effectiveness of the pumping system. The presence of gas bubbles in the fluid stream may result in irregularities and fluctuations in pressure, potentially hindering the ability of the pump to consistently draw fluids from the well. These factors may collectively contribute to a potential decrease in operational efficiency and may pose challenges to the reliability of fluid extraction processes.

[0051] In some exemplary embodiments of the present invention, the housing (202) may include a gas separator, to isolate gas from incoming fluid within the wellbore. The gas separator is configured to perform the task of separating gas bubbles from the produced fluid.

[0052] Generally, in the realm of oil extraction, a gas separator is a key component designed to address challenges related to gas-liquid separation within the wellbore. The gas separator functions by efficiently separating gas from the fluid stream, preventing undesirable gas accumulation that could disrupt the fluid flow. The gas separator is strategically placed in the wellbore system to ensure effective separation, allowing the purified fluid to continue its journey while redirecting gas to an appropriate outlet.

[0053] In some exemplary embodiments of the present invention, the housing (202) may include a tube (212) positioned in the second opening (208). The tube (212) may direct the fluid stream from the housing (202) towards the filtering assembly (210). In another embodiment, the length of the tube (212) within the housing (202) may be adjustable, which may help in varying the capacity of the housing (202).

[0054] In some exemplary embodiments of the present invention, there may be a gap between the outer walls of the tube (212) and the edge of the housing (202). In some exemplary embodiments of the present invention, the tube (212) may be positioned eccentrically within the housing (202). The eccentric placement of the tube (212) may enhance the flow dynamics of the fluid stream. In some exemplary embodiments of the present invention, the tube (212) may be made of different materials, such as high-strength alloys or composite materials. The diversity in selection of material may contribute to improved fluid flow dynamics. For instance, the use of high-strength alloys with smooth surfaces may mitigate frictional resistance, allowing for a more streamlined flow of fluids. Similarly, composite materials may offer corrosion resistance, reducing the risk of material degradation and potential blockages in the system. In some exemplary embodiments of the present invention, the dimensions of the tube (212) may be 2 X 9.6m-2.9 ".

[0055] In some exemplary embodiments of the present invention, the distance between the side of the tube (212) facing the downhole portion of the wellbore and the bottom of the housing (202) may be approximately two-third of the entire height of the housing (202), allowing sand and particulates to accumulate within the housing (202) up to two-third its height.

[0056] In some exemplary embodiments of the present invention, the tube (212) may be movably connected with a sliding side door (214) to adjust the length of the tube (212) within the housing (202). The movable connection may allow for the adjustment of the length of the tube (212) in the housing (202), contributing to the adaptability and versatility of the tube (212) in different operating conditions. In someexemplary embodiments of the present invention, the sliding side door (214) may allow for adjusting the length of the tube (212) within the housing (202) to regulate the distance between the face of the tube (212) directed towards the bottom of the housing (202) and the housing (202) bottom. By sliding the sliding side door in the open position, an operator may be able to pull the tube (212) back, effectively increasing the distance. The process of sliding the sliding side door (214) in the open position may allow for the accumulation of sand within the housing (202), reaching a height equivalent to the newly configured distance.

[0057] In some exemplary embodiments of the present invention, the tube (212) may be removable from the housing (202). In some exemplary embodiments of the present invention, the sliding side door (214) may facilitate the removal of the tube (212) from the housing (202), providing a mechanism to keep the system operational until maintenance can be performed. By sliding the sleeve to the open position, an operator may have the capability to completely extract the tube (212) from the housing (202). The functionality of the sliding side door may allow for necessary inspections or replacements without disrupting the overall system operation.

[0058] In the field of oil extraction, a sliding side door (SSD) (214) or a “sliding sleeve door” or simply a “sliding door” is a mechanical component used to control the opening or closing of a passage within a system. It typically operates by sliding horizontally to either permit or restrict fluid flow. The mechanism is commonly employed in well completion systems to regulate the flow of fluids in and out of the wellbore.

[0059] The mechanical setup of the sliding side door (214) typically involves precision engineering to ensure seamless operation and durability under the challenging conditions of oil extraction. The horizontal sliding action is commonly facilitated by a mechanism that may include rollers, guides, or other suitable components.

[0060] In some exemplary embodiments of the present invention, the system may include a filtering assembly (210) connected to the pump (204) positioned in an uphole portion of the well bore. In some exemplary embodiments of the present invention, the filtering assembly (210) may be directly connected to the pump (204). In some exemplary embodiments of the present invention, the filtering assembly (210) may be connected to the pump (204) indirectly through the use of conduits, tubes (212), or other connecting elements.

[0061] The filtering assembly (210) may filter out particulates from the fluid stream received from the housing (202). The housing (202) may be positioned relative to the filtering assembly (210), enablingthe filtered particles to accumulate in the housing (202) through the second opening (208), and the filtered fluid stream may be received by the pump (204). In some exemplary embodiments of the present invention, the housing (202) may be positioned below the filtering assembly (210). In some exemplary embodiments of the present invention, the filtering assembly (210) may extend partially inside the housing (202) as the assembly passes through the second opening (208). In some exemplary embodiments of the present invention, the filtering assembly (210) may be positioned with a gap between the filtering assembly (210) and the walls of the housing (202). Such configuration may facilitate the passage of sand and particles through the second opening (208), which may allow them to accumulate within the housing (202) and contribute to the efficient filtration of the fluid stream. In some exemplary embodiments of the present invention, the filtering assembly (210) may be positioned eccentrically from the center of the housing (202).

[0062] Generally, sand accumulation poses significant challenges in the field of oil extraction. When sand particles infiltrate the fluid stream during the extraction process, they can lead to several operational issues. The presence of sand in the extracted fluids may cause abrasive wear and tear on the equipment, including pumps and pipelines. The abrasive action may result in increased maintenance requirements and a higher likelihood of equipment failure. Additionally, sand accumulation can hinder the smooth flow of fluids through the wellbore, potentially causing disruptions in the production process. Moreover, the transported sand can settle in various components, causing blockages and reducing the overall efficiency of the extraction system.

[0063] In some exemplary embodiments of the present invention, the system may utilize a sand screen as the filtering assembly (210). The sand screen may be positioned within the housing (202), where the sand screen may act as a barrier to prevent sand particles from entering the fluid stream. The positioning of the sand screen may reduce the risk of abrasive wear and damage to upstream components, addressing the challenge of sand ingress during oil extraction processes. In another exemplary embodiment, a 2-3 / s " sand screen may be utilized for filtering.

[0064] In some exemplary embodiments of the present invention, the system may include a pump (204) to receive the filtered fluid stream. The pump (204) may be positioned in an uphole portion of the wellbore. In some exemplary embodiments of the present invention, the pump (204) may be mounted on a pump setting nipple. In some exemplary embodiments of the present invention, the pump (204) may be mounted on an insert anchor.

[0065] In some exemplary embodiments of the present invention, the system may utilize different types of pumps, including an SRP (Sucker Rod pump). An SRP may operate through the reciprocatingmotion of a sucker rod, which may draw fluid to the surface. The present method of fluid extraction may be particularly suitable for specific wellbore conditions, such as low-to-moderate depth wells with consistent fluid properties. In scenarios where simplicity and adaptability to varying flow rates may be required, SRPs can offer an efficient solution tailored to optimize fluid extraction under these conditions.

[0066] In some exemplary embodiments of the present invention, the system may utilize various types of pump. Among these options may be a centrifugal pump, which operates by rotating an impeller to create a centrifugal force, facilitating efficient fluid movement within the wellbore. The simplicity of design and adaptability to varying flow rates make centrifugal pumps a potential choice for specific operational contexts.

[0067] In some exemplary embodiments of the present invention, a reciprocating pump may be used for its pumping mechanism, utilizing a piston or diaphragm to generate fluid movement. The pump may be particularly suitable in situations where precise control of fluid displacement is required. The ability of reciprocating pump to handle varying viscosities and pressures adds to its potential effectiveness in the gas and sand separation system.

[0068] Additionally, in some exemplary embodiments of the present invention, a progressive cavity pump may be considered for optimizing fluid extraction. The pump may include a helical rotor moving within a stator, which creates a progressive cavity for fluid transfer. This type of capability of the pump to handle abrasive fluids and suitability for low-flow, high-viscosity conditions may make it a valuable choice in specific wellbore scenarios.

[0069] Furthermore, in some exemplary embodiments of the present invention, a submersible pump may be explored as an option for fluid extraction. Positioned directly within the wellbore, submersible pumps operate while submerged in the fluid being pumped. The positioning of the pump reduces the distance that the fluid needs to travel, potentially enhancing the efficiency of fluid extraction. Submersible pumps may find applicability in wells with deeper depths or when specific operational requirements favor their use.

[0070] In certain embodiments of the present invention, a jet pump may also be considered for fluid extraction within the gas and sand separation system. The jet pump operates on the principle of creating a high-velocity jet of fluid to entrain and lift the desired fluid to the surface, thereby offering simplicity of design and ease of installation.

[0071] Generally, in the field of oil extraction, a pump facilitates the upward movement of fluids from the wellbore to the surface. The pump contributes to the overall efficiency of fluid extraction processeswhen positioned strategically in the uphole portion of the wellbore. Its primary function is to receive the filtered fluid stream from the housing through the second opening (208). By doing so, the pump ensures the smooth transfer of clean fluids to the surface for further processing. The placement of the pump in the uphole portion is designed to optimize fluid extraction, enabling a more effective and streamlined operational process in oil extraction activities.

[0072] FIG. 3 provides a schematic representation of a system for filtering particulates from a fluid stream. Non-limiting example encompasses key components, including a housing (302), a filtering assembly (310), and a pump (304) positioned on a mounting anchor within the wellbore. The integration of these components forms a cohesive and efficient system aimed at addressing the challenges associated with particulate matter in the fluid stream during the oil extraction process. The placement of the pump (304) on the mounting anchor ensures stability and optimal functionality within the wellbore environment.

[0073] FIG. 4 illustrates a non-limiting example of a particulate filtering system within a wellbore. The system includes a housing (402), a filtering assembly (410), and a pump (404) mounted on a pump setting nipple (PSN). Notably, the system incorporates a sliding side door (414) as an additional component. The SSD may adjust the length of the tube (412) within the housing (402). By sliding the door into the open position, operators may gain the ability to pull the tube (412) back, effectively increasing the distance between the face of the tube (412) towards the bottom of the housing (402). The adjustment of the tube may allow for precise control over the accumulation height of sand within the housing (402), enhancing the adaptability of the system to varying operational conditions. The SSD, through its sliding mechanism, may facilitate a seamless and efficient means of tube (412) length adjustment, contributing to the overall functionality of the particulate filtering system.

[0074] FIG. 5 may illustrate a schematic view of a particulate filtering system in a wellbore, featuring a housing (502), a filtering assembly (510), and a pump (504) mounted on an anchor. In the current configuration, the anchor plays a pivotal role in providing stability to the pump (504). Additionally, the system incorporates a sliding side door (514) to facilitate the adjustment of the tube (512) length within the housing (502). The SSD, when moved to the open position, empowers operators to retract the tube (512), altering the distance between the face of the tube (512) and the bottom of the housing (502).

[0075] FIG. 6 presents a schematic view of a particulate filtering system, featuring a housing (602), filtering assembly (610), and a pump (604) mounted on a pump Setting Nipple (PSN). The system incorporates a sliding side door (614) for adjusting the length of the tube (612) within the housing (602), where the tube (612) is eccentrically positioned. The eccentric placement not only induces turbulence inthe fluid flow, aiding in the efficient release of gas, but it also provides more space for gases to escape. The off-center positioning of the tube (612) creates additional voids within the housing (602), allowing gases to swiftly rise and exit the fluid stream. The design contributes to the rapid and effective separation of gases from the filtered fluid, optimizing the overall performance of the particulate filtering system.

[0076] FIG. 7 illustrates a schematic view of a particulate filtering system, depicting a housing (702), filtering assembly (710), and a pump (704) mounted on an anchor mount. The anchor mount stabilizes the pump (704) within the wellbore, minimizing vibrations and ensuring secure positioning. The stability enhances the efficiency of the filtering assembly (710) by reducing potential disruptions caused by pump (704) movement. Additionally, the sliding side door (714) facilitates the adjustment of the tube (712) length within the eccentrically positioned housing (702). The eccentric configuration induces turbulence in the fluid flow, aiding in the efficient release of gas and creating more space for gas to escape.

[0077] FIG.8 illustrates a non-limiting example of a method for filtering particulates from a fluid stream. The method for filtering particulates from a fluid stream utilizes the apparatus. At step 802, the method for filtering particulates may include receiving a fluid stream by a first opening structured in a housing positioned below a pump in a wellbore.

[0078] In some exemplary embodiments of the present invention, the fluid stream may enter through the first opening located at the bottom of the housing. In another exemplary embodiment, the fluid stream may be directed through the first opening positioned on the sidewalls of the housing, adjacent to the side facing the downhole portion of the wellbore. In some instances of the present invention, the fluid stream may be received through the plurality of perforations forming the first opening. In other embodiments, the fluid stream may enter through the plurality of perforations forming the first opening along a portion of the side of the housing adjacent to the housing bottom.

[0079] In some exemplary embodiments of the present invention, the method may involve receiving a fluid stream by the housing wherein the method may involve varying the capacity of the housing by adjusting the length of a tube that is movably connected to a sliding side door. The SSD, when slid open, may allow an operator to alter the position of the tube, thereby adjusting its length. The ability to alter the position of the tube offers adaptability to different operating conditions, enabling optimization of the capacity of the housing based on specific requirements in the wellbore system.

[0080] At step 804, the method may include filtering the particulates from the fluid stream by a filtering assembly connected to the pump such that the filtered particulates are accumulated in the housing through the second opening. In some exemplary embodiments of the present invention, the method mayinclude a filtering process where the filtering assembly receives a fluid stream directed by a tube situated in the second opening of the housing. The tube may be positioned eccentrically within the housing, contributing to optimizing the flow dynamics of the fluid stream. Additionally, the method may involve the removal of the tubing from the housing, providing a practical and efficient approach to maintenance or replacement procedures. The present configuration may ensure that the fluid stream is effectively processed by the filtering assembly, with the eccentrically positioned tube enhancing the overall efficiency of particulate filtration.

[0081] At step 806, the method may further include receiving, by the pump, the filtered fluid stream. In some exemplary embodiments of the present invention, the method may involve releasing gas received with the fluid stream from the housing, and that may involve a plurality of perforations forming a first opening. The perforations may allow for the controlled release of gas, addressing the challenge of gas accumulation in the wellbore during oil extraction.

[0082] FIG 9. illustrates a cross sectional view of an oil wellbore with the filtration system (900) performing the method of the present invention. The fluid flow from the source of the fluid travels through the pathway. The fluid may comprise, as shown, oil (918), gas (920) and sand (922), which in the mixed form passes through the pathway to reach the housing (902). During the passage of the fluid flow through the passage, the sand may accumulate at a certain portion of the passage. As seen in FIG 9, the fluid with oil, gas and sand are received by the perforations or first opening (906) structured on the walls of the housing (902). The gasses after being received by the housing (902) exit from the housing (902) through perforations and move towards the upper section of the wellbore. On the other hand, the oil along with the sand or particulates are directed to the filtering assembly (910) by the pressure, for example, suction pressure created by the pump (904) connected with the filtering assembly (910). The sand or particulates are filtered out by the filtering assembly (910) and get accumulated in the housing (902). The filtered-out sand (918) from the filtering assembly (910) is received by the second opening (908) that may include a tube (912). The tube (912) may be positioned in the second opening (908) such that the fluid is directed to the filtering assembly (910) via the tube (912) and the filtered sand is received by the housing (902) through the second opening (908) from the area outside the tube (912) of the second opening (908).

[0083] FIG. 10 illustrates a graphical representation of experimental data about oil production rate for an oil well over a period of 9 months emphasizing the influence of the filtration system as described in the present invention. The timeline spans from January 2023 to August 2023 on the x-axis, while the y-axisrepresents the oil yields. The graph is segmented into three distinct periods, referred to as period a, period b, and period c.

[0084] The first segment spanning January 2023 to April 2023 without the filtration system of the current system and labeled (a) displays a consistent line with a yield hovering around 200 with a decline in oil production rate in January, which appears to be increasing to its original levels after repair of the pump. Transitioning to the second segment, covering May to June 2023 and labeled (b) a substantial decline in yield is evident again due to the failure of the pump due to sand accumulation. After the repair is done the green line sharply rises to approximately 300 in May. The third segment (c), extending from July to August 2023, lacks features of a declining green line as compared to the other 2 segments. The visual representation indicates that the filtration system of the present invention significantly impacted the yield of wellbore. The decrease in the slope of the graph depicts the reduced decline in yield post installation of the filtration system of the present invention as apparent, suggesting a positive outcome.

[0085] FIG.11 illustrates a graphical representation of experimental data about oil production rate for an oil well over a period of 2.5 years, from April 2021 to July 2023. The x-axis denotes the date, while the y-axis illustrates the oil rates ranging from 0 to 700. The graph is divided into three distinct periods d, period e, and period f.

[0086] In the initial segment without the filtration system of the current system, from April 2021 to April 2022 labeled as (d) the oil rate starts at approximately 400 at the start of April 2021 and gradually diminishes to around 200 by April 2022. Following which the oil rate decreases drastically to 0 at the start of January 2023. The decline is attributed to reservoir depletion and pump failure.

[0087] Transitioning to the second segment, spanning from January 2023 to April 2023 and labeled (e), a significant surge in the oil rate is observed post-workover and installation of the filtration system of the present invention. It peaked around 300 in February 2023, gradually decreasing to approximately 0 by April 2023.

[0088] In the third segment, from April 2023 to July 2023, labeled (f) but significant, the oil rate experienced a continued decline but at a lesser rate, albeit remaining above levels observed in the initial section. It can be observed that the filtration system of the present invention continues to exert a positive influence on the oil rate, despite ongoing reservoir depletion.

[0089] FIG. 12 illustrates a graphical representation of experimental data about oil production rate for an oil well over a period of 9 months, from January 2023 to September 2023. The x-axis denotes thedate, while the y-axis illustrates the oil rate ranging from 0 to 800. The graph is divided into 2 distinct periods labeled as period g and period h.

[0090] In the first segment labeled (g), representing data from January 2023 to May 2023, the oil production rate in segment (g) is almost constant from January 2023 to February 2023 hovering at around 100 units. Followed by a decrease due to pump failure at the end of February 2023 and thereafter again almost constant oil production rate till May 2023.

[0091] During the period from May 2023 to August 2023, denoted by segment (h), there was an initial drop in the oil production rate compared to the preceding period represented by segment (g). However, this decrease was temporary, caused by the implementation of the filtration system described in this invention. Following this brief decline, the oil production rate stabilized and remained essentially constant throughout the remainder of segment (h).

[0092] Therefore, as depicted from the above, the graphical representation suggests that the filtration system of the present invention may have effectively maintained a stable oil rate in wellbore.

Claims

AMENDED CLAIMS received by the International Bureau on 28 April 2026 (28.04.2026)We Claim:

1. An apparatus (200) for filtering particulate from a fluid stream comprising: a housing (202) positioned below a pump (204) in a wellbore, the housing having a first opening (206) and a second opening (208), the first opening (206) structured to receive the fluid stream from the well bore; and a filtering assembly (210) connected to the pump (204) positioned in an uphole portion of the well bore, the filtering assembly (210) configured to filter out the particulates from the fluid stream received from the housing, wherein the housing includes a tube positioned in the second opening to direct the fluid stream from the housing towards the filtering assembly, wherein the housing (202) is positioned relative to the filtering assembly (210) (210) such that the filtered particles are accumulated in the housing (202) through the second opening (208) and the filtered fluid stream is received by the pump (204).2 The apparatus (200) as claimed in claim 1, wherein the length of the tube (212) in the housing (202) is adjustable to vary the capacity of the housing (202).3 The apparatus (200) as claimed in claim 1, wherein the tube (212) is removable from the housing (202).4 The apparatus (200) as claimed in claim 1, wherein the tube (212) is positioned eccentrically in the housing (202) to improve flow of the fluid stream.5 The apparatus (200) as claimed in claim 2, wherein the tube (212) is movably connected with a sliding side door (514) to adjust the length of the tube (212) in the housing (202).6 The apparatus (200) as claimed in claim 1, wherein the filtering assembly (210) is a sand screen.7 The apparatus (200) as claimed in claim 1, wherein the housing (202) includes a plurality of perforations (216) forming the first opening (206) configured to release gas received with the fluid stream from the housing (202).8 A method for filtering particulate from a fluid stream comprising: receiving, by a first opening (206) structured in a housing (202) positioned below a pump (204) in a wellbore, the fluid stream; receiving, by a filtering assembly (210), the fluid stream directed by a tube (212) positioned in the second opening (208) of the housing (202), filtering, by the filtering assembly (210) connected to the pump (204) positioned in an uphole portion of the well bore, the particulates from the fluid stream received from the housing (202), wherein the housing (202) is positioned relative to the filtering assembly (210) such that the filtered particles are accumulated in the housing (202) through a second opening (208); andreceiving, by the pump (204), the filtered fluid stream from the filtering assembly (210).

9. The method as claimed in claim 8, wherein the tube (212) is positioned eccentrically in the housing (202) and is removable from the housing (202).

10. The method as claimed in 8, wherein receiving the fluid stream by the housing (202) comprises: varying the capacity of the housing (202) by adjusting the length of tube (212) movably connected to the sliding side door (514).

11. The method as claimed in 9, wherein the method comprises releasing gas received with the fluid stream, by a plurality of perforations forming a first opening (206), from the housing (202).

12. A system for filtering particulate from a fluid stream comprising: a pump (204) positioned in an uphole portion of a well bore; a housing (202) positioned below the pump (204), the housing (202) having a first opening (206) and a second opening (208), the first opening (206) structured to receive the fluid stream from the well bore; and a filtering assembly (210) connected to the pump (204), the filtering assembly (210) configured to filter out the particulates from the fluid stream received from the housing (202), wherein the housing (202) includes a tube (212) positioned in the second opening (208) to direct the fluid stream from the housing (202) towards the filtering assembly (210), wherein the housing (202) is positioned relative to the filtering assembly (210) such that the filtered particles are accumulated in the housing (202) through the second opening (208) and the filtered fluid stream is received by the pump (204).

13. The system as claimed in claim 12, wherein the pump (204) is mounted on a pump setting nipple.

14. The system as claimed in claim 12, wherein the pump (204) is mounted on an insert anchor.

15. The system as claimed in claim 12, wherein the length of the tube (212) in the housing (202) is adjustable to vary the capacity of the housing (202).

16. The system as claimed in claim 12, wherein the tube (212) is removable from the housing (202).

17. The system as claimed in claim 12, wherein the tube (212) is positioned eccentrically in the housing (202) to improve flow of the fluid stream.

18. The system as claimed in claim 12, wherein the tube (212) is movably connected with a sliding side door (514) to adjust the length of the tube (212) in the housing (202).

19. The system as claimed in claim 12, wherein the filtering assembly (210) is a sand screen.

20. The system as claimed in claim 12, wherein the housing (202) includes a plurality of perforations forming the first opening (206) configured to release gas received with the fluid stream from the housing (202) to cause liquid and gas separation.

Images