Abstract:
A remotely controllable flow control configuration including a body; one or more flow restrictors disposed in the body; and a selector fluidly connected with the body and capable of supplying or denying fluid to one or more of the one or more flow restrictors and method.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application contains subject matter related to the subject matter of co-pending applications, which are assigned to the same assignee as this application, Baker Hughes Incorporated of Houston, Tex. The below listed applications are hereby incorporated by reference in their entirety: 
         [0002]    U.S. Patent Application Attorney Docket No. 274-49269-US (BAO0340US), entitled REMOTELY CONTROLLABLE MANIFOLD filed Jul. 2, 2009. 
     
    
     BACKGROUND 
       [0003]    In fluid flowing systems, balance of a profile of fluid flow may be necessary in order to optimize the system. One example of such is in the downhole drilling and completion industry where fluids flowing into or out of a borehole, from or to a subterranean formation are subject to fingering due to varying permeability of the formation and frictional pressure drops. Controlling flow profiles that have traditionally been attempted using such devices are known in the art as inflow control devices. These devices work well for their intended use but are fixed tools that must be positioned in the completion as built and to be changed requires removal of the completion. As is familiar to one of ordinary skill in the art, this type of operation is expensive. Failure to correct profiles, however, is also costly in that for production wells that finger, undesirable fluid production is experienced and for injection wells, injection fluids can be lost to the formation. For other types of borehole systems, efficiency in operation is also lacking. For the foregoing reasons, the art would well receive a flow control configuration that alleviates the inefficiencies of current systems. 
       SUMMARY 
       [0004]    A remotely controllable flow control configuration including a body; one or more flow restrictors disposed in the body; and a selector fluidly connected with the body and capable of supplying or denying fluid to one or more of the one or more flow restrictors. 
         [0005]    A remotely controllable flow control configuration including a body; one or more flow restrictors disposed in the body; an individual channel fluidly connected with each flow restrictor of the one or more flow restrictors; and a selector fluidly connected with the body and capable of supplying or denying fluid to a selected channel. 
         [0006]    A method for remotely controlling flow downhole including initiating a signal at a remote location to actuate a flow control configuration, a remotely controllable flow control configuration including a body; one or more flow restrictors disposed in the body; and a selector fluidly connected with the body and capable of supplying or denying fluid to one or more of the one or more flow restrictors; and modifying a flow profile in response to adjusting the configuration. 
         [0007]    A method for remotely controlling flow downhole including initiating a signal at a remote location to actuate a flow control configuration, a remotely controllable flow control configuration including a body; one or more flow restrictors disposed in the body; an individual channel fluidly connected with each flow restrictor of the one or more flow restrictors; and a selector fluidly connected with the body and capable of supplying or denying fluid to a selected channel; and modifying a flow profile in response to adjusting the configuration. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    Referring now to the drawings wherein like elements are numbered alike in the several Figures: 
           [0009]      FIG. 1  is a schematic axial section view of a remotely controllable variable inflow control configuration as disclosed herein; 
           [0010]      FIG. 2  is an axial view of the embodiment illustrated in  FIG. 1  taken along section line  2 - 2  in  FIG. 1 ; 
           [0011]      FIG. 3  is an axial view of the embodiment illustrated in  FIG. 1  taken along section line  3 - 3  in  FIG. 1 ; 
           [0012]      FIG. 4  is a schematic illustration of the selector disclosed herein with an alternate motor drive configuration; 
           [0013]      FIG. 5  is a schematic axial section view of an alternate embodiment of a remotely controllable variable inflow control configuration as disclosed herein; 
           [0014]      FIG. 6  is an axial view of the embodiment illustrated in  FIG. 5  taken along section line  6 - 6  in  FIG. 5 ; and 
           [0015]      FIG. 7  is an axial view of the embodiment illustrated in  FIG. 5  taken along section line  7 - 7  in  FIG. 5 . 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    Referring to  FIG. 1 , a configuration  10  is schematically illustrated to include a screen section  12 , a selector  14  and a body  16  having one or more flow restrictors  18 ,  20 ,  22  (for example; no limitation intended) disposed in seriatim. The body further includes a number of flow channels  24 ,  26 ,  28  (again for example; no limitation intended)) that in one embodiment occur in sets about the body  16  as illustrated. It is to be understood that the number of restrictors need only be a plurality (this embodiment type) for variability in function as taught herein and need only be one if the adjustability is simply on or off. There is no upper limit to the number of restrictors that may be employed other than practicality with respect to available space and length of the tool desired or reasonably possible given formation length, etc. The number of flow channels in each set of flow channels represented will match the number of restrictors for reasons that will become clearer hereunder. The number of sets of flow channels however will be dictated by the available space in the body  16  and the relative importance to avoid a pressure drop associated with the number of channels as opposed to that facilitated by the restrictors  18 ,  20 ,  22  themselves. Generally, it will be undesirable to have additional flow restriction, causing a pressure drop, at the interface of the channels or at the selector  14 . This is mediated by the cross sectional dimension of the channels and the cross sectional dimension of selector ports  30  as well as the actual number of sets of channels and the actual number of selector ports  30  aligned with channels. Stated alternately, the selector ports  30  can affect flow in two ways that are relevant to the invention. These are in the size of the opening representing each port  30  and the number of ports  30 . Because it is desirable to avoid flow restriction in this portion of the configuration, the greater the size and number of ports  30  the better. This is limited by available annular space as can be seen in  FIG. 3  but more so by the number of channels in each set of channels (that take up significantly more space in the annular area of the body  16 ) as can be seen in  FIG. 2 . Because the number of channels can reduce the number of sets of channels that can be employed and the embodiment discussed uses only one port per set of channels. Accordingly the number of ports possible in this embodiment is limited more by the number of channels than it is by the annular area of the selector itself 
         [0017]    The reason there is a plurality of channels in each set of channels for a particular configuration and a plurality of restrictors for that same particular configuration is to present a number of selectable pathways (associated with each channel) for fluid flow that will be directed (in the illustrated embodiment): 1) through all of the plurality of restrictors; 2) through some of the plurality of restrictors; or 3) through one of the plurality of restrictors. Further, it is noted that each restrictor of the plurality of restrictors may have its own pressure drop thereacross or the same pressure drop thereacross. They may all be the same, some of them may be the same and others different, or all may be different. Any combination of pressure drops among each of the plurality of flow restrictors in a given configuration is contemplated. 
         [0018]    Referring directly to  FIG. 1 , there is a pathway created that includes restrictors  18 ,  20  and  22 . That pathway is associated with channel  24 . Where fluid is directed to channel  24 , the pressure drop for that fluid will be the sum of pressure drops for the plurality of restrictors presented, in this case three (each of  18 ,  20  and  22 ). Where fluid is directed alternatively to channel  26 , the fluid bypasses restrictor  18  and will be restricted only by whatever number of restrictors are still in the path of that fluid, in this case restrictors  20  and  22 . In this case the pressure drop for fluid flowing in channel  26  will be the sum of pressure drops from restrictors  20  and  22 . Where fluid is directed to channel  28 , both restrictors  18  and  20  are bypassed and the only restrictor in the pathway is restrictor  22 . In this position, the pressure drop is only that associated with restrictor  22 . In each statement made, other pressure dropping properties such as friction in the system are being ignored for the sake of simplicity of discussion. Therefore for a downhole system in which this configuration is used, the pressure drop can be adjusted by selecting channel  24 ,  26  or  28  as noted. These can be selected at any time from a remote location and hence the configuration provides variability in flow control downhole and in situ. 
         [0019]    In addition to the foregoing, in this particular embodiment or in others with even more restrictors arranged in seriatim, another level of restriction is possible. It should be appreciable by a reader having understood the foregoing description that in the illustrated embodiment, since there is annular room in the body  16  as illustrated for another channel, that is not shown but could be created between channels  28  and  24 , another level of restriction or pressure drop can be obtained within the same illustrated embodiment. This is by bypassing all of the restrictors  18 ,  20 ,  22 . This would present effectively no pressure drop due to flow restrictors in the flow pathway since all of them will have been bypassed. In each case the final entry of the fluid into the inside dimension of the configuration is through orifices  32 . As should be evident from the foregoing, the configuration provides a number of remotely selectable pressure drops depending upon which channel is selected or the remote ability to shut off flow by misaligning the selector ports with the flow channels, in one embodiment. 
         [0020]    The selection capability is provided by selector  14 . As was noted earlier, in one embodiment the selector will have a number of ports  30  that matches the number of sets of channels such that it is possible to align each one of the ports  30  with the same type of channel in each set of channels. For example, in the illustrated embodiment of  FIG. 3 , the selector includes four ports  30  and the body  16  in  FIG. 2  includes four sets of channels  24 ,  26 ,  28 . When the selector is aligned such that one of the ports  30  aligns with, for example, channel  24 , each of the other ports  30  will align with the channel  24  of another set of the channels  24 ,  26 ,  28 . In so doing, the configuration  10  is set to produce a particular pressure drop using the selected number of restrictors  18 ,  20 ,  22  associated with a particular channel for each set of channels. Selection is facilitated remotely by configuring the selector  14  with a motor that is electrically or similarly actuated and hence can be commanded from a remote location, including a surface location. The motor may be of annular configuration, such motors being well known in the art, or may be a motor  34  offset from the selector such as that illustrated in  FIG. 4 . It will be appreciated that the interconnection of the motor  34  with the selector  14  may be of any suitable structure including but not limited to spur and ring gears, friction drive, belt drive, etc. 
         [0021]    The configuration  10  possesses the capability of being reactive, not on its own, but with command from a remote source, to change the pressure drop as needed to optimize flow profiles either into or out of the borehole. It is important to note that while the terms “inflow control” have sometimes been used in connection with the configuration disclosed herein, “outflow” is equally controllable to modify an injection profile with this configuration. 
         [0022]    In an alternate embodiment, configuration  110 , referring to  FIGS. 5 ,  6  and  7 , a maze-type restrictor arrangement whose restrictor operability is known to the art from a similar commercial product known as EQUALIZER MAZE™ is employed. This type of flow restrictor provides restricted axial flow openings followed by perimetrical flows paths followed by restricted axial openings, which sequence may be repeated a number of times. In accordance with the teaching hereof, these types of restrictors are configured in quadrants or thirds or halves of the body  116  and could be configured as fifths, etc. limited only by practicality and available space. In current commercial embodiments of maze-type restrictors, each maze is of the same pressure drop and all function together. In the embodiment disclosed herein however, the restrictors, for example four, are each distinct from the other. This would provide four different pressure drops in a quadrant based maze-type system, three different pressure drops for a triad based maze-type system, two different pressure drops for a half based maze-type system, etc. It is to be understood however that all of the restrictors need not be different from all the others in a particular iteration. Rather each combination of possibilities is contemplated. Referring to  FIG. 6 , there are illustrated four channels  150 ,  152 ,  154 ,  156 , each of which is associated with one restrictor. As illustrated in  FIG. 5 , restrictors  118  and  120  can be seen, the other two being above the paper containing the view and behind the plane of the paper containing the view, respectively. The selector  114  of the illustrated embodiment,  FIG. 6 , includes just one port  130  that can be manipulated via a motor similar to the motor possibilities discussed above to align the one port  130  with one of the channels  150 ,  152 ,  154 ,  156 . By so doing, a selected pressure drop is available by command from a remote location including from a surface location (note such remote actuation is contemplated for each iteration of the invention). The embodiment is useful in that it allows for a more compact structure overall since each different pressure drop restrictor exists in the same longitudinal section of body rather than requiring a seriatim configuration that causes the body to be longer to accommodate the daisy-chained restrictors. 
         [0023]    It is further noted that the embodiment of  FIGS. 5-7  can be modified to provide additional possible flow restriction than just each of the restrictors individually. By providing more ports  130  in the selector  114 , one or more of the channels  150 ,  152 ,  154 ,  156  can be selected and the average pressure drop of the number of restrictors implicated will prevail for the configuration. It will be appreciated that with consideration of available space, different combinations of restrictors in this embodiment can be selected through rotation of the selector  114 . 
         [0024]    While preferred embodiments have been shown and described, modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustrations and not limitation.