• 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:
    intelligent completion system, and method for removing or reducing a deposit or accumulation in a well device, in an intelligent completion having multiple production zones. an intelligent completion system includes production piping configured for production from multiple zones in a well; at least one flow control valve arranged in the production pipeline for each of the multiple zones, wherein at least one flow control valve regulates the flow of a well fluid into the production pipeline; a chemical injection mandrel disposed in the production pipeline adjacent to at least one flow control valve in each of the multiple zones, wherein the chemical injection mandrel is connected to at least one chemical injection line. chemical to inject one or more chemicals into the well; and a control mechanism connected to the at least one flow control valve and the chemical injection mandrel so that the injection mandrel and at least one flow control valve are operated in a coordinated manner.
    公开号:BR112012007732A2
    申请号:R112012007732-5
    申请日:2010-08-26
    公开日:2021-08-31
    发明作者:Dinesh R. Patel；Christopher Taor；Kenneth Rohde
    申请人:Prad Research And Development Limited；
    IPC主号:
    专利说明:

    y INTELLIGENT COMPLETION SYSTEM, AND METHOD TO REMOVE
    OR REDUCE A DEPOSIT OR ACCUMULATION ON A WELL DEVICE, IN A SMART COMPLETION HAVING MULTIPLE ZONES
    BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to well operations and, more particularly, to chemical injection into wells for smart completions. Background Art Hydrocarbon fluids such as oil and gas are produced from underground formations by drilling a well to penetrate the formation containing hydrocarbons. After drilling, wells are typically completed with various well devices to facilitate production of the hydrocarbons. In an intelligent completion system, various sensors, pumps and flow control valves are included. In addition, an intelligent completion system can include fully automated measurement and control systems that 'optimize reservoir economics without human intervention. When a large production zone or multiple production zones is completed, the intelligent completion system can include multiple production zones. FIG. 1
    . shows an example of two adjacent producing zones 10 and
    12. The well is lined with casing 16, which has perforations 18 and 19, respectively, in zones 10 and 12. A lower hole assembly 11 includes an upper plug 13 and a lower plug 14. There is an upper screen 15 , a lower screen 17, and a zone insulating plug 10a separating the zones 10 and 12. An annular space 11a is defined between the casing 16 and the tubing 112a and between the plugs 13 and 14.
    When formation fluids come in contact with a pipe, valve, or other production equipment in a well, or when there is a decrease in temperature, pressure, or other changing conditions, waxes and/or asphaltenes in formation fluids can precipitate. or separate. Over time, deposits such as scale, wax, OR asphaltene etc., can build up on surfaces of uUuU well components and impede their operation and/or efficiency. To address the issue of deposit buildup, chemicals can be injected into production piping to remove, reduce or inhibit deposit material within the piping or over well devices. For example, a control line can be run down from the surface to an injection point located at completion to drive the injected chemical to the downhole within a production stream. A common practice is to have one or more injection points provided to DSI ARE DDR SATA IS tds AAA AAA ada a a Da a aaa aa iii
    | ; | , amount of a production shutter.
    In smart completion well systems, multiple flow control valves are lowered to control production from multiple zones. However, these different valves may not work if scale accumulates around moving surfaces. Descending control lines from the surface to remedy these situations may not be practical when multiple zones are included in a completion. Therefore, adequate chemical injection systems are needed to prevent and/or reduce deposit accumulation in smart completion. Summary of the Invention One aspect of the invention relates to smart completion systems. An intelligent completion system, according to a form. in. embodiment of the invention, includes production piping configured for producing multiple zones in a well; at least one flow control valve arranged in the pipeline. 20 production for each of the multiple zones, wherein at least one flow control valve regulates the flow of a well fluid within the production pipeline; a chemical injection mandrel disposed in the production pipeline adjacent to at least one flow control valve in each of the multiple zones, wherein the chemical injection mandrel is connected to at least one
    ' chemical injection line to inject one or more chemicals into the well; and a control mechanism connected to the at least one flow control valve and the chemical injection mandrel so that the injection mandrel and at least one flow control valve are operated in a coordinated manner.
    Another aspect of the invention pertains to methods for removing or reducing a deposit or accumulation in a well device, in an intelligent completion, having multiple production zones. A method according to an embodiment of the invention includes: opening a flow control valve disposed on a production pipeline, the opening simultaneously activating a chemical injection mandrel disposed in the pipeline production, adjacent to the flow control valve in the same zone; injection of at least one chemical using =| the chemical injection chuck; and allowing at least one chemical to flow through the flow control valve.
    Other aspects and advantages of the invention will become apparent from the following description and the appended claims. Brief Description of the Drawings FIG. l shows a conventional multizone completion in a well.
    FIG. 2 shows a schematic illustration of a chemical injection system for intelligent multi-zone completion, in accordance with an embodiment of the invention.
    FIG. 3 shows a schematic illustration of an operational state of a smart completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIG. 4 shows a schematic illustration of another operational state of a smart completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIG. 5 shows a schematic illustration of another operational state of a smart completion with a chemical injection system, in accordance with an embodiment of the invention.
    : Yeah | FIG. 6 shows a schematic illustration of another = operational state of an intelligent completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIG. 7 shows a schematic illustration of another operational state of an intelligent completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIG. 8 shows a schematic illustration of another operational state of an intelligent completion with a chemical injection system, according to a
    TESOSOS embodiment of the invention.
    FIG. 9 shows a schematic illustration of another operational state of an intelligent completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIG. 10 shows a schematic illustration of another operational state of a smart completion with a chemical injection system, in accordance with an embodiment of the invention.
    FIGs. 11(A) - 11(D) show examples of chemical injection chucks, which may be used with embodiments of the invention, and their open and closed states.
    FIG. 12A shows a cross-sectional view of a chemical injection mandrel along line AA in fig. 5, according to an embodiment of the invention, and fig. 12B shows a cross-sectional view along line BB in FIG. 12A.
    FIG. 13 shows a cross-sectional view of a constant flow metering valve that can be used with embodiments of the invention.
    "FIG. 14 shows a smart completion with a chemical injection system and a mixing device, according to an embodiment of the invention.
    FIG. 15 shows a method to remove or reduce
    ENO A h accumulations in a well device, according to an embodiment of the invention.
    Detailed Description Embodiments of the invention relate to systems and methods for removing or preventing build-up on well devices, in smart completion systems, in multi-zone wells.
    Embodiments of the invention may be used for multi-point injections of chemicals into multi-zone smart completions, on land or at sea.
    One skilled in the art will appreciate that embodiments of the invention may also be used with other types of completions, with appropriate modifications and variations.
    Some embodiments of the invention pertain to multi-point chemical injection systems for use with smart completions —“multizones.” These chemical injection systems can be used to prevent deposits or accumulations of scale, wax, etc.. Such accumulations may interfere with the proper operations or efficiencies of various well devices, such as pumps or flow control valves.
    By injecting chemicals into the production streams upstream of such devices (e.g. flow control valves), these chemical additives will be transported through the production streams to flow through (or flow through) particular devices, thereby dissolving the accumulations. undesirable, or preventing the formation of these accumulations. 7 The type of chemicals used with embodiments of the invention may vary with the conditions to be corrected or prevented (paraffins, scale, etc.). For example, for asphaltene accumulations, the injected chemical may consist of aromatic compounds, such as toluene, kerosene, or naphtha. For paraffin build-ups, the injected chemical can be xylene or toluene. For hydrate build-ups, the injected chemical can be surfactants (eg polyvinyl caprolactan) or methanol. For scale accumulations, the chemical can be EDTA (ethylene tetraacetic acid) or HCl (hydrochloric acid). The above are examples used for illustration only, and are not intended to be exhaustive. E EEE In accordance with embodiments of the present invention, chemical injection systems can be configured to be operated with existing controls, which are already present in a smart completion. Such controls may be controls. hydraulic or electrical controls. For example, hydraulic control lines (to open and close) are typically included in completions to control flow control valves in various zones. By sharing the existing control mechanisms in completions ESSO
    : smart, embodiments of the invention can be easily incorporated into any smart completion system. Furthermore, using such systems, chemical injections can be synchronized with the operation of flow control valves, i.e. chemical injection will be turned off, when flow control valves in a given zone are closed, and chemical injection will only be performed when the flow control valves are open.
    In the following description, numerous details are presented to provide an understanding of the present invention. However, it should be appreciated by those skilled in the art that the present invention may be practiced without such details, and that numerous variations or modifications of the described embodiments may be possible, without departing from the scope of the invention. nm FIG. 2 shows an example of a chemical injection system for use with intelligent multi-zone completion, in accordance with an embodiment of the invention. Well 21 may be lined with a casing 22 having perforations to communicate with formation perforations 24, 242 in production zones 26, 26a, respectively. The production zones 26, 26a may be isolated by shutters, such as a production shutter 28 and a zonal isolation shutter 28a.
    In a typical smart completion, one or more NESSA
    | 10 . flow control valves can be included in each production zone.
    For example, as shown in FIG. 2, flow control valves 23 and 23a are provided in production pipeline 25, in production zones 26 and 26a, respectively.
    These flow control valves can be used to regulate which zone produces the hydrocarbons, and they can also be used to regulate flow rates.
    These flow control valves are typically controlled by hydraulic command lines, although some are controlled by electrical means.
    For example, as shown in FIG. 2, three hydraulic control lines are illustrated.
    Separate "to close" control lines 20a and 20b are individually connected to flow control valves 23 and 23a, respectively.
    In addition, a common "to open" line 22a is connected to both "flow control valves" 23 and 23a.
    The operations of these valves, for example, can be controlled by the pressure differentials between the "to close" and "to open" lines associated with each specific flow control valve.
    For example, all flow control valves connected to the "to open" control line 22a can be opened when that "to open" control line 22a is pressurized.
    However, any individual valve can be closed by applying a similar pressure (to oppose the pressure differential) to the specific "to close" control line connected to that particular flow control valve. Therefore, the individual flow control valves can be independently regulated in an intelligent completion system.
    In accordance with embodiments of the invention, multi-point chemical injection systems can be designed to take advantage of these existing flow control mechanisms in smart completion, thus minimizing engineering challenge and costs. In certain smart completions, the flow control valves can be regulated electrically. In this situation, embodiments of the invention can also take advantage of existing electrical controls to minimize engineering challenge and costs. For clarity, the description that follows will use hydraulic controls to illustrate embodiments of the invention. However, one skilled in the art will appreciate that embodiments of the invention can also be used with electrical control.
    à As shown in FIG. 2 , a chemical injection system 20 according to an embodiment of the invention may include injection mandrels 27, 27a connected to production piping 25 adjacent flow control valves 23, 23a. Each of the injection mandrels 27, 27a can be connected to one or more chemical injection lines (two chemical injection lines 29, 29a are shown in this example). : In accordance with embodiments of the invention, if more than one chemical injection line is connected to an injection mandrel, these various chemical injection lines may be separately injected by the injection mandrel, or they may be mixed in the injection mandrel. injection chuck, before these chemicals are injected into a well. A suitable metering device can be connected to each chemical injection line and/or to an outlet of the chemical injection mandrel. In addition, one or more check valves can be used with each chemical injection line to prevent fluid backflow. For example, chemical injection lines 29 and 29a each are provided with dual check valves 21a in example B shown in FIG. 2. In accordance with a certain embodiment of the invention, chemical injections are preferably carried out in a manner coordinated with the operation of the flow control valves in the respective zones, for example, chemical injection is only carried out in the zone, where the flow control valve is open. This coordinated way of operation can avoid wasting chemicals in the well when the flow control valve in that zone is not open. TESS
    FIG. 2 shows a chemical injection system, in accordance with an embodiment of the invention,] wherein chemical injection may be synchronized with the opening of a flow control valve. As shown, hydraulic shutoff line 20a is connected to flow control valve 23 and injection mandrel 27, while hydraulic shutoff line 20b is connected to flow control valve 23a and injection mandrel 27a. A common opening line 22a is connected to all flow control valves 23, 23a and to all injection mandrels 27, 27a.
    This configuration allows the timing of injection mandrels 27 and 27a to be in sync with the timing of adjacent flow control valves 23 and 23a, respectively. That is, the injection mandrel 27 functions only when the flow control valve 23 is open, and the injection mandrel 27a functions only when the flow control valve 23a is open. The term "in sync" or "synchronization" refers to the coordinated operating state of flow control valves and chemical injections in a specific zone, which 1 does not require the valves to open or close at exactly the same time. Due to different configurations of various valves and the nature of hydraulic operations, a short time delay may occur for a valve or injection mandrel, one in
    ESA relationship to the other.
    As noted above, one or more chemical injection lines may be connected to an injection mandrel.
    In addition, if more than one chemical injection line is connected to a chuck, these chemical injection lines can be separately injected by the chuck.
    Alternatively, these chemical injection lines can be mixed in the mandrel, before they are injected into a well.
    The description that follows will use some examples to illustrate embodiments of the invention.
    One skilled in the art will appreciate that these examples are for illustration only, and are not intended to limit the scope of the invention.
    Example 1 The first example illustrates a chemical Nm injection system, according to an embodiment of the invention, wherein two or more chemical injection lines (e.g. chemical A and chemical B) are mixed. , before being injected into a well by ! 20 an injection mandrel.
    Figs. 3-6 illustrate various operating states of such a chemical injection system, in conjunction with flow control valve operations, in multi-zone operations.
    For this illustration, a chemical injection system is shown having two chemical injection lines and two injection mandrels for operation in two production zones (zone 1 and zone 2), separated by a zonal isolation plug.
    One of ordinary skill in the art will appreciate that embodiments of the present invention can be used with any suitable number of chemical injection lines in any suitable number of zones.
    The chemical injection system shown in FIG. 3 includes a first chemical injection line 31 and a second chemical injection line 33 connected to a first injection mandrel 35. Chemicals from the first chemical injection line 31 and the second injection line of chemical 33 may be mixed in the first injection mandrel 35. Likewise, the first chemical injection line 31 and the second chemical injection line 33 may be connected to a second injection mandrel 35a.
    Chemicals from the first chemical injection line 31 and the second chemical injection line 33 can be mixed in the second injection mandrel 35a.
    Í Chemicals from the two chemical injection lines can be mixed within a chamber on each of the injection mandrels.
    Injection chucks include outlets for injecting these chemicals into wells.
    Inlets (from chemical injection lines) and/or outlets on the injection mandrel may include metering valves. Specific operating states of the present chemical injection system are illustrated as follows. FIG. 3 shows a state of the chemical injection system where flow control valves (FCV1 and FCV2) and chemical injection mandrels 35, 35a are closed in both zones 1 and 2, which are separated by a zonal isolation plug 306. In this state, well fluids in zone 1 and zone 2 cannot enter the production pipeline 36, and chemicals will not be injected into the well. This can be a "rest" state, where both zones are not producing. The "rest" state can be reached, when all hydraulic control lines are not pressurized, ie all hydraulic control lines have been bled. Therefore, the ms pressure differential between the "open" and "close" lines connected to each flow control valve, or injection mandrel, is negligible (or zero) and therefore all valves are closed. FIG. 4 shows a state of the chemical injection system, in which zone 1 is in production, while zone 2 is not. In this state, the first flow control valve (FCV1) is open, and the first chuck is operational. This allows chemicals from the first and second chemical injection lines to TE AS
    31, 32 are injected into the well, in zone 1. These chemicals then mix with the well fluids and | enter, through the first flow control valve (FCVl1), into the production pipeline 36. As these chemicals pass through the first flow control valve (FCVl), these chemicals can remove or prevent any build-up in the FCVl. In addition, these chemicals can lubricate the FCVl. This state can be achieved by applying pressure to the opening control line 304 and the second closing control line 302, while allowing the first closing line 300 to remain bled (i.e., low or no pressure). . Under these conditions, the pressure differential between control lines 304 and 302 is small or non-existent, while the pressure differential between EEE control lines 304 and 300 is substantial (or above a threshold). Therefore, only the devices (FCVl and second injection mandrel 35) connected to the control line 300 are operational. I FIG. 5 shows another state of the chemical injection system Tn, where zone 2 is producing while zone 1 is not. This can allow chemicals to be injected into the well in zone 2. Then the well fluids in zone 2 will be mixed with the injected chemicals before passing through the well. ONLY
    FCV2 and enter production pipeline 36. When passing through FCV2, the injected chemical can help prevent or remove build-up in FCV2. This state can be achieved by applying pressure to the opening control line 304 and the first closing control line 300, while allowing the second closing line 302 to remain bled (i.e., low or no pressure). . Under these conditions, the pressure differential between control lines 304 and 300 is small or non-existent, while the pressure differential between control lines 304 and 302 is substantial. Therefore, eponas devices (FCV2 and second injection mandrel 35a) connected to the control line 302 are operational. FIG. 6 shows another state of the chemical injection system, where both zones 1 and 2 are in E production. This state allows injected chemicals to pass through the FCV1 and FCV2 flow control valves, thereby removing or preventing harmful buildup on these valves. This state can be achieved by applying pressure to the opening control line 304 while keeping the first and second closing control lines 300, 302 in the bleed state. Example 2 The example above uses a fuel injection system.
    TS SAS chemical, which mixes different chemicals in the injection mandrel. In accordance with some embodiments of the invention, injection mandrels can also be designed to allow independent injection of different chemicals without mixing.
    For example, figs. 7-10 show a chemical injection system capable of performing independent chemical injections without mixing. In this illustration, a chemical injection system may have two chemical injection lines 31, 33 connected to two chucks 35, 35a for operation in two production zones (zone 1 and zone 2), separated by an isolation shutter zonal 306. Two chemical injection lines are for illustration only. One of ordinary skill in the art will appreciate that embodiments of the present invention may include any suitable number of chemical injection lines.
    As noted above, each of the chemical injection lines 31, 33 may contain one or more check valves. Furthermore, each of the chemical injection lines 31, 33 can be independently connected to separate chambers 70, 72 in the first injection mandrels 35 and to separate chambers 70a, 72a in the second injection mandrel 35a, respectively. Thus, the chemicals from the chemical injection lines 31, 33 can be kept separate inside the chucks of
    EEE injection, which can then inject these chemicals through independent outlets into wells. In addition, hydraulic control lines 300, 302 and 304 are connected to two flow control valves (FCV1, FCV2), and to two mandrels 35, 35a, as in the embodiment shown in FIG. 3. Hydraulic control lines are used to operate the flow control valves and mandrels in a manner known in the art, for example the valves are opened when the hydraulic lines connected to that particular device have a pressure differential greater than a limit.
    FIG. 7 shows a state of the chemical injection system where all flow control valves are closed and all chemical injection mandrels are not activated in zones 1 and 2. In this state, well fluids in zone 1 and zone 2 cannot enter production pipeline 36, and chemicals will not be injected into the well. This can be a state of "rest". This resting state, for example, can be achieved by not applying any pressure to all hydraulic control lines, that is, all hydraulic control lines have been bled.
    FIG. 8 shows another state of the chemical injection system, where zone 1 is operating while zone 2 is closed. This may allow chemicals in chambers 70, 72, in the first injection mandrel 35, to be injected into the well. Injected chemicals will mix with well fluids in zone 1, passing through the flow control valve FCV1, and entering production pipeline 36. These chemicals can help remove or prevent build-up in FCV1l.
    This state can be achieved by applying pressure to the opening control line 304 and the second hydraulic closing line 302, while allowing the first hydraulic closing line 300 to remain bled.
    FIG. 9 shows another state of the chemical injection system, where zone 2 is producing while zone 1 is closed. This may allow chemicals in chamber 70a, 72a, second injection mandrel 35a to be injected into the well. The injected chemicals will mix with well fluids in zone 2 and pass through FCV2, before entering production pipeline 36, thus helping to remove or prevent build-up in FCV2.
    This state can be achieved by applying pressure to the opening control line 304 and the first q hydraulic closing line 300, while allowing the second hydraulic closing line 302 to remain bled.
    FIG. 10 shows another state of the chemical injection system, where zone 1 and zone 2 are producing. This state can allow chemicals to be injected through chucks 35, 35a into a well. The injected chemicals will mix with well fluids in zone 1 and zone 2, and pass through FCV1 and FCV2, before entering production pipeline 36, thus helping to remove or prevent build-up in FCV1 and FCV2.
    This state can be achieved by applying pressure to the opening control line 304, while allowing the first and second hydraulic closing lines 300, 302 to remain bled.
    Injection chucks for use with embodiments of the invention may be any suitable injection chuck known in the art, such as those utilizing piston control valves. For example, FIG. 11(A) and FIG. 11(B) illustrate a mandrel of a chamber in the closed and open states, respectively. The = open and closed states can be controlled by the relative pressure of control lines 300 and 304 to push piston 30 (to the right or to the left, as shown in the figure). As shown, chemical injection lines 31 and 33 are connected to the same chamber 70 in the mandrel. ] Such an injection chuck will mix the chemicals before injecting them into a well.
    FIG. 11(C) and FIG. 11(D) illustrate an injection mandrel with separate chambers for chemical injection in the closed and open states, respectively. Like
    THESES shown, chemical injection line 31 is connected to chamber 70, while chemical injection line 33 is connected to chamber 72. Such an injection mandrel will not mix the chemicals before injecting them. in a well.
    The injection chucks can be configured to inject the chemicals in any desired configuration. For example, an injection chuck can discharge fluids into a conduit, which is arranged around the circumference of the tool body, and a number of holes can be provided in that conduit, as illustrated in FIG. 12A. Such a configuration helps to distribute the injected chemicals around the well, in many azimuthal directions.
    FIG. 12A shows a cross-sectional view along line AA in Fig. 5, and Fig. 12B shows a cross-sectional view along line BB in Fig. 11A. As shown in Fig. 12A, a mandrel 120 may have a hydraulically operable piston 30 to open and close the chemical outlet 124 in an injection block 126. The outlet opening 124 may allow chemicals to flow into the outlet. from the chamber through a conduit 121 along the circumference of mandrel 120. Conduit 121 may have a plurality of holes 123 and a chemical outlet port 127. Chemicals may be injected into the well through the plurality of holes
    123. The amount and flow rate of the injected chemicals may be controlled by a metering valve 125, for example, disposed at outlet 124. The metering valve 125 may be a constant flow metering valve, or any suitable metering devices.
    All appropriate metering valves can be used with embodiments of the invention. For example, FIG. 13 shows an example of a constant flow metering valve 130, which is commercially supplied by Lee Company (Westbrook, CT). This constant flow metering valve 130 includes a variable orifice 131 and a constant orifice 132, which rests against a spring 133. If more pressure is applied from inlet 134, the spring 133 will be compressed, resulting in less opening in the valve. variable orifice 131. On the other hand, when less pressure is applied from the inlet 134, the spring 133 can expand and push the variable orifice 131 to be more open. As a result, such a valve can provide relatively constant flow regardless of pressure variations.
    Example 3 i Although the above-illustrated embodiments are capable of distributing the injected chemicals around the well in a relatively constant fashion, sometimes a complete mixture of the injected chemicals with the well fluids is desired. In this case, embodiments of the invention, such as illustrated above, may be further equipped with one or more flow mixing devices. For example, FIG. 14 shows a chemical injection system in accordance with an embodiment of the invention that includes one or more mixing devices. The chemical injection system is similar to that shown in Figs. 7-10, but with additional flow mixing devices 140. Although that figure shows that mixing devices 140 are only provided in zone 2, one skilled in the art will appreciate that other modifications and variations are possible, without departing from the scope of invention. Some embodiments of the invention pertain to methods for reducing or removing deposits or build-up on downhole tools or devices. FIG. 15 shows a method for reducing or removing deposits or build-up on well tools or devices, in accordance with an embodiment of the invention. Method 150 may include step 152 of opening a | flow control valve, which at the same time activates an adjacent injection chuck. When the flow control valve is open, it performs chemical injections, and allows the injected chemicals to pass through a flow control valve (step 154). The advantages of embodiments of the invention
    SS EA may include one or more of the following. The systems and methods of the invention can be used to prevent: chemical deposits and build-up in smart completion wells, where multiple flow control valves are lowered to control multi-zone production. Chemical injection systems can be designed to utilize the existing control mechanism, thus reducing engineering challenges and costs. According to some embodiments of the invention, chemical injections are performed only when flow control valves in the same zones are open. This helps to avoid wasting chemicals when they are not needed.
    Thus, embodiments of the invention can provide cost- and time-saving ways to ensure clean and functional valves used in smart completion well systems.
    While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having the benefit of such disclosure, will appreciate that | other embodiments can be conceived which do not depart from the scope of the invention as disclosed herein. For example, the hydraulic control described above can be replaced by the electrical control mechanism. In this case, the hydraulic lines illustrated in the drawings can be replaced by control lines.
    AA ES OT electric (wires). Therefore, the scope of the invention should be limited only by the appended claims.
    权利要求:
    Claims (16)
    [1]
    1. DF SYSTEM. INTELLIGENT COMPLETION, characterized by the fact that it comprises: production piping configured for the production of multiple zones in a well; at least one flow control valve disposed in the production pipeline for each of the multiple zones, wherein at least one flow control valve regulates the flow of a fluid from the well into the production pipeline; chemical injection mandrel disposed in production piping adjacent to at least one flow control valve in each of the multiple zones, wherein the chemical injection mandrel is connected to at least one injection line chemical to inject one or more chemicals into the well; and control mechanism connected to the at least one flow control valve and the chemical injection mandrel so that the injection mandrel and at least one flow control valve are operated in a coordinated manner.
    [2]
    2. SYSTEM, according to claim 1, characterized in that at least one chemical injection line comprises a check valve.
    [3]
    3. SYSTEM, according to claim 1,
    characterized in that it further comprises a mixing device disposed adjacent the chemical injection mandrel or at least one flow control valve.
    [4]
    4, SYSTEM according to claim 1, characterized in that the control mechanism comprises a hydraulic mechanism having a plurality of hydraulic control lines.
    [5]
    5. SYSTEM, according to claim 1, characterized in that the control mechanism comprises an electrical control mechanism.
    [6]
    6. SYSTEM, according to claim 1, characterized in that the coordinated form is such that the chemical injection mandrel is operational, only when at least one flow control valve in the same zone is open.
    [7]
    7. SYSTEM, according to claim 1, characterized in that the chemical injection mandrel comprises a metering valve.
    [8]
    8. SYSTEM, according to claim 7, characterized in that the metering valve is a constant flow valve.
    [9]
    9. SYSTEM, according to claim 1, characterized in that at least one chemical injection line comprises two or more lines connected to the chemical injection mandrel.
    [10]
    10. SYSTEM, according to claim 9, characterized in that two or more lines are connected to a chamber, in the chemical injection mandrel, so that chemicals from the two or more lines are mixed in the chamber.
    [11]
    11. SYSTEM, according to claim 10, characterized in that it also comprises a mixing device arranged adjacent to the chemical injection mandrel, or to at least one flow control valve.
    [12]
    12. SYSTEM, according to claim 9, characterized in that two or more lines are independently connected to different chambers in the chemical injection mandrel.
    [13]
    13. SYSTEM, according to claim 12, characterized in that it also comprises a mixing device arranged adjacent to the chemical injection mandrel, or to at least one flow control valve.
    [14]
    14. METHOD TO REMOVE OR REDUCE A DEPOSIT OR ACCUMULATION IN A WELL DEVICE, IN A SMART COMPLETION HAVING MULTIPLE PRODUCTION ZONES, characterized in that it comprises: opening a flow control valve arranged on a production pipeline, in which the opening activates, at the same time, a chemical injection mandrel arranged in the production pipeline adjacent to the flow control valve, in the same zone; injection of at least one chemical using the chemical injection mandrel; and allowing at least one chemical to flow through the flow control valve.
    [15]
    15. METHOD, according to claim 14, characterized in that the opening of the flow control valve is through hydraulic control lines.
    [16]
    16. METHOD, according to claim 14, characterized in that the opening of the flow control valve is through an electrical control.
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    同族专利:
    公开号 | 公开日
    WO2011043872A2|2011-04-14|
    US20110079398A1|2011-04-07|
    WO2011043872A3|2011-06-30|
    NO20120423A1|2012-06-14|
    US8408314B2|2013-04-02|
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    法律状态:
    2021-09-08| B08F| Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]|Free format text: REFERENTE A 11A ANUIDADE. |
    2021-12-21| B08K| Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]|Free format text: REFERENTE AO DESPACHO 8.6 DA RPI 2644 DE 08/09/2021. |
    优先权:
    申请号 | 申请日 | 专利标题
    US24890309P| true| 2009-10-06|2009-10-06|
    US61/248,903|2009-10-06|
    US12/843,944|US8408314B2|2009-10-06|2010-07-27|Multi-point chemical injection system for intelligent completion|
    US12/843,944|2010-07-27|
    PCT/US2010/046729|WO2011043872A2|2009-10-06|2010-08-26|Multi-point chemical injection system for intelligent completion|
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