Flow control apparatus for use in a wellbore

Information

  • Patent Grant
  • 6371210
  • Patent Number
    6,371,210
  • Date Filed
    Tuesday, October 10, 2000
    24 years ago
  • Date Issued
    Tuesday, April 16, 2002
    22 years ago
Abstract
The present invention provides an apparatus for use in a wellbore to compensate for pressure differentials between fluid in the wellbore and fluid in an oil bearing formation therearound. In one aspect of the invention, an apparatus is provided for insertion in a string of screened tubulars in a horizontal wellbore. The device includes an inner tubular body portion having apertures in the wall thereof for passing oil, an outer tubular body and a pathway therebetween permitting oil from a formation to migrate into the inner body. Disposed around the inner body is an axially movable member to selectively cover and expose the apertures of the inner body, thereby permitting fluid to flow therethough.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




The invention relates to the control of fluid flow into a wellbore. More particularly, the invention relates to a flow control apparatus that compensates for pressure differentials along a wellbore.




2. Background of the Related Art




In hydrocarbon wells, horizontal wellbores are formed at a predetermined depth to more completely and effectively reach formations bearing oil or other hydrocarbons in the earth. Typically and as shown in

FIG. 1

, a vertical wellbore


102


is formed from the surface of a well


100


and thereafter, using some means of directional drilling like a diverter, the wellbore is extended along a horizontal path. Because the hydrocarbon bearing formations can be hundreds of feet across, these horizontal wellbores


104


are sometimes equipped with long sections of screened tubing


106


which consists of tubing having apertures therethough and covered with screened walls, leaving the interior of the tubing open to the inflow of filtered oil.




Along the length of a horizontal wellbore


104


, a pressure drop occurs between the toe


108


, or end of the wellbore and the heel portion


110


thereof due primarily to friction looses in fluid traveling through the wellbore. Over time, the lower pressure of the fluid at the heel of the wellbore


104


causes a correspondingly lower fluid pressure in the formation adjacent the heel. The result is a “coning” effect whereby fluid in the formation tends to migrate toward the heel


110


of the wellbore, decreasing the efficiency of production over the length of the horizontal wellbore. The path of fluid in such a condition is illustrated by arrows


101


in FIG.


1


.




In an attempt to equalize the fluid pressure across a horizontal wellbore, various potential solutions have been developed. One example is the EQUALIZER™ production management system manufactured and sold by Baker Oil Tools of Houston, Tex. The EQUALIZER™ device incorporates a helical channel as a restrictor element in the inflow control mechanism of the device. The helical channel surrounds the inner bore of the device and restricts oil to impose a more equal distribution of fluid along the entire horizontal wellbore. However, such an apparatus can only be adjusted at the well surface and thereafter, cannot be re-adjusted to account for dynamic changes in fluid pressure once the device is inserted into a wellbore. Therefore, an operator must make assumptions as to the well conditions and pressure differentials that will be encountered in the reservoir and preset the helical channel tolerances according to the assumptions. Erroneous data used to predict conditions and changes in the fluid dynamics during downhole use can render the device ineffective.




A variation of the same problem arises in the operation of gas injection wells. Under certain conditions, it is necessary to provide artificial forces to encourage oil or other hydrocarbons into a wellbore. One such method includes the injection of gas from a separate wellbore to urge the oil in the formation in the direction of the production wellbore. While the method is effective in directing oil, the injection gas itself tends to enter parts of the production wellbore as the oil from the formation is depleted. In these instances, the gas is drawn to the heel of the horizontal wellbore by the same pressure differential acting upon the oil. Producing injection gas in a hydrocarbon well is undesirable and it would be advantageous to prevent the migration of injection gas into the wellbore.




There is a need therefore, for a flow control apparatus for downhole use in a wellbore that compensates for the dynamic changes and differences in fluid pressure along the length of the wellbore. There is a further need, for a flow control apparatus for use in a wellbore that is self-regulating and self-adjusts for changes in pressure differentials between an oil bearing formation and the interior of the apparatus. There is yet a further need for a flow control apparatus that prevents the introduction of unwanted gasses and fluids into a wellbore but allows the passage of oil therethrough. There is yet a further need for a flow control apparatus that will prevent the migration of unwanted fluids into a wellbore after the oil in a formation therearound is depleted. There is still a further need for a flow control apparatus that can be controlled remotely based upon well conditions in a wellbore or in the formation therearound.




SUMMARY OF THE INVENTION




The present invention provides an apparatus for use in a hydrocarbon producing wellbore to compensate for pressure differentials between fluid in the wellbore and fluid in an oil bearing formation therearound. In one aspect of the invention, a perforated inner tube is surrounded by at least one axially movable member that moves in relation to pressure differentials between fluid inside and outside of the apparatus. The movable member selectively exposes and covers the perforations of the inner tube to pass or choke fluid moving into the apparatus from the wellbore. In another aspect of the invention, an apparatus is provided for insertion in a string of screened tubing in a horizontal wellbore. The apparatus includes an inner tubular body portion having apertures in the wall thereof for passing oil, an outer tubular body and a pathway therebetween permitting oil from a formation to migrate into the inner body. Disposed around the inner body is an annular sleeve having apertures formed therethrough, the apertures constructed and arranged to align with the apertures of the inner body, thereby permitting fluid to flow therethough. In one embodiment, the sleeve member is spring biased on the inner body, and includes a piston surface acted upon by fluid entering an annular area between the annular sleeve and the outer body. In the presence of a pressure differential between the fluid in the formation and the fluid inside the apparatus, the apparatus is designed to restrict the flow of oil into the wellbore. Specifically, the piston surface is deflected by a mass flow rate brought about by a pressure differential. As the piston is deflected, the apertures of the body and the sleeve become increasingly misaligned, preventing most inflow of fluid into the body when the piston is completely actuated. The flow of fluid into the apparatus therefore, is inversely related to the pressure differential between the inside and outside of the apparatus. In another aspect of the invention, more than one apparatus is placed in series in a wellbore to compensate for pressure differential over a predetermined length of the wellbore. In another aspect of the invention, the apparatus is at least partially controlled by regulating and manipulating the pressure in a formation that is acted upon by an injection gas.




BRIEF DESCRIPTION OF THE DRAWINGS




So that the manner in which the above recited features, advantages and objects of the present invention are attained and can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings.











It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.





FIG. 1

depicts a partial cross-sectional view of a prior art vertical and horizontal hydrocarbon wellbore.





FIG. 2

is a partial cross-sectional view of the apparatus of the subject invention in a horizontal wellbore.





FIG. 3

is a more detailed cross-sectional view of the apparatus showing an annular sleeve therein in a biased-open position relative to the inner body of the apparatus.





FIG. 4

is a cross-sectional view of the apparatus showing the annular sleeve in a partially closed position relative to the inner body of the apparatus.





FIG. 5

illustrates an alternative embodiment of the invention with the sleeve portion in a first or partially closed position.





FIG. 6

illustrates the apparatus of

FIG. 5

, with the sleeve portion shown in a second or open position.





FIG. 7

illustrates the apparatus of

FIG. 5

, with the sleeve portion shown in a third or partially closed position.





FIG. 8

depicts multiple flow control apparatus according to the invention placed in series along a horizontal wellbore.





FIG. 9

depicts an embodiment of the invention wherein the apparatus is connectable to a standard section of screened tubular.





FIG. 10

is an alliterative embodiment of the invention and

FIG. 11

is another view of the embodiment of FIG.


10


.





FIG. 12

is an end view, in section of the embodiment of

FIG. 10

taken through a line


12





12


of FIG.


10


.





FIG. 13

is a section view showing an alliterative embodiment of the invention.





FIG. 14

is a section view showing an alternative embodiment of the invention.





FIG. 15

is a section view showing an alternative embodiment of the invention.





FIG. 16

is a section view showing an alternative embodiment of the invention and





FIG. 17

is an end view in section thereof taken along a line


17





17


of FIG.


16


.











To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the Figures.




DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT





FIG. 2

depicts a cross-sectional view of a well


200


having a flow control apparatus


212


located therein. Specifically, an apparatus


212


for controlling the flow of oil or some other hydrocarbon from an underground reservoir


203


into a wellbore


202


is depicted. The well


200


includes a cased, vertical wellbore


202


and an uncased, horizontal wellbore


204


. Production tubing


209


for transporting oil to the surface of the well is disposed within the vertical wellbore


202


and extends from the surface of the well


200


through a packing member


205


that seals an annular area


211


around the tubing and isolates the wellbore therebelow. A horizontal wellbore


208


includes a section of screened tubing


206


. The screened tubing


206


continues along the horizontal wellbore


204


to a toe


208


thereof. The apparatus


212


is attached to the screened tubing


206


near the heel


210


of the horizontal wellbore


204


.





FIG. 3

is a more detailed view of an apparatus


312


in an uncased, horizontal wellbore


304


. In the embodiment of

FIG. 3

, the flow control apparatus


312


is a two-position apparatus with a first position allowing the unrestricted inflow of oil and a second position restricting the inflow of oil. The apparatus is additionally designed to assume any number of positions between the first and second positions thereby providing an infinitely adjustable restriction to the inflow of oil into the wellbore. While the second position in the embodiment shown does not completely restrict the flow of fluid into the apparatus, it will be understood by those skilled in the art that the apparatus could be designed to completely restrict the passage of fluid.




The apparatus includes an inner tubular body


307


having an outer tubular body


324


disposed therearound. Disposed in an annular area


305


between the inner


306


and outer


324


bodies is an axially slidable sleeve member


311


which is biased in a first position relative to the inner body


306


by a spring


320


or other biasing member. Apertures


317


formed in the sleeve


311


are aligned with mating apertures


308


formed in the inner body


306


to allow oil to pass from the wellbore into the apparatus


312


. In the embodiment shown in

FIG. 3

, the apparatus


312


is integrally formed at an end of a joint of screened tubing


306


. Proximate a first end


302


of the flow control apparatus


312


, the screened tubing


306


is un-perforated and fluid passing through the screen is directed into annular area


305


of the apparatus


312


. The fluid flow into the apparatus is illustrated by arrows


313


. A piston surface


318


is formed on the sleeve


311


and is constructed and arranged to cause the sleeve


311


to become deflected and to move axially in relation to the inner body when acted upon by a fluid with sufficient momentum and mass to overcome the resistive force of the spring


320


. Specifically, the spring


320


is selected whereby a mass flow rate created by a pressure differential will result in a fluid momentum adequate to deflect the sleeve, thereby shifting the apparatus from the first fully opened position to a position wherein the inflow of fluid into the apparatus is at least partially restricted.




In

FIG. 3

, the apertures


308


formed in the wall of the inner member and the apertures


317


formed in the sleeve


311


are aligned, allowing an open path of fluid into the interior of the apparatus


212


from the wellbore therearound. The position of the sleeve in

FIG. 3

is indicative of little or no pressure differential between the exterior and interior of the apparatus


212


. In the presence of a predetermined pressure differential, the sleeve


311


is deflected by a mass flow rate of fluid proportional to the difference in pressure between the interior and exterior of apparatus


312


. As the sleeve


311


is moved from the first position, the flow of fluid into the apparatus is reduced, thereby compensating for a pressure differential by creating an area of restricted flow into the wellbore.

FIG. 4

is a cross-sectional view of the apparatus


312


showing the sleeve


311


in a shifted position relative to the inner body


306


. As illustrated in the Figure, fluid acting upon piston surface


318


of sleeve


311


has compressed spring


320


and shifted the sleeve to a second position. In the position shown in

FIG. 4

, he apertures


317


in the sleeve


311


and the apertures


308


of the inner body


306


are partially misaligned. This condition constricts the flow of fluid into the apparatus. The constricted flow path is illustrated by arrows


402


.





FIG. 5

depicts an alternative embodiment of the invention including an apparatus


412


for use in wellbores of gas injection wells where, for example gas is provided from another wellbore near the producing wellbore


404


. Typically, the secondary wellbore (not shown) is drilled to the top of the formation and gas or some other injection material is injected therein. Injection material is typically an inert, environmentally safe material that will not unduly degrade the quality of oil during production. For example the injection material could be selected from the group consisting of water, steam and gas recovered from another portion of the formation. Other types of injection materials are known to those skilled in the art and are considered within the scope of this application.




In the embodiment of

FIG. 5

, all components of the apparatus


412


are essentially identical to those described above with respect to

FIGS. 2-4

with the addition of a third position of the sleeve


411


with respect to the inner body


406


of the apparatus. Specifically, the sleeve


411


and spring


420


are designed to restrict the inflow of oil in a first position and a third position and to permit the inflow of oil in a second, center position.

FIG. 5

illustrates the apparatus


412


with the sleeve in a first position whereby the inflow into the apparatus


412


is restricted due to a misalignment of apertures in the sleeve


411


and the inner body


408


. Since it is undesirable to introduce an injection material like gas into the wellbore, the apparatus


412


is designed to restrict the flow of any material into the wellbore when that material has a mass flow rate lower than that of oil. In other words, since the gas injection material has a lower mass flow rate than oil, the presence of gas will not deflect the piston surface


418


of the sleeve


411


in order to shift the apparatus


412


to the center position illustrated in FIG.


6


. In the presence of oil, with its higher mass flow rate however, the apparatus


412


will allow the oil to pass therethrough as the oil causes the sleeve


411


to move to a central, or opened position within the apparatus.

FIG. 6

illustrates the apparatus


412


in its center or opened position. The action of oil on the piston surface


418


of the sleeve


411


has caused the sleeve to move axially and partially compress spring


420


disposed between the sleeve


411


and the outer member


424


. The flow of oil into the apparatus is illustrated by arrows


480


.




In the presence of a pressure differential between oil on the exterior and interior of the apparatus, the sleeve


411


of the apparatus


412


will move toward a third or partially closed position, thereby restricting the flow of the fluid into the apparatus.

FIG. 7

illustrates the apparatus


412


in the third position. Spring


420


is almost completely compressed as fluid momentum has acted upon piston surface


418


of sleeve


411


, causing the sleeve to move axially in the direction of the spring


420


. In the position illustrated in

FIG. 7

, the apparatus has compensated for a pressure differential by partially restricting the inflow of oil into the apparatus.




From the basic designs seen and described herein, the apparatus of the present invention can be expanded upon in various embodiments to address wellbore conditions relating to differences in pressure along a wellbore or the presence of an unwanted gas or fluid near a wellbore. For example,

FIG. 8

depicts a number of apparatus


212


linked in series along a horizontal wellbore


204


from the heel end


210


towards the toe end


208


. Having multiple apparatus


212


along the wellbore


204


compensates for differing and increasing/decreasing pressure differentials along the wellbore. In this multi-apparatus embodiment, the sleeves in each subsequent apparatus would typically be shifted and closed to a lesser extent as the pressure differential along the horizontal wellbore decreases in the direction of the toe portion of the wellbore.





FIG. 9

shows an embodiment of the invention wherein the apparatus


512


is a separate unit and can be installed on the end of a standard piece of screened tubing


515


. In the embodiment of

FIG. 9

, apparatus


512


is linked to the screened tubing


515


via a threaded coupler


502


. The apparatus


512


is provided with a stab portion


503


that is constructed and arranged to be received in the interior of the screened tubing


515


, creating an annular area


504


which is sealed at a first end an provides a fluid path into the apparatus


512


at a second end. The apparatus


512


is then affixed to the screened tubing


515


with coupler


502


. In use, the oil entering the screened tubing


515


is directed into the annular area


504


and then into the apparatus


512


. The path of fluid into the apparatus


512


is depicted by arrows


505


.




In addition to actuating the sleeve of the apparatus through fluid momentum, the apparatus can utilize remote means of actuation, including hydraulic and electrical means. For example, the apparatus can be controlled from the surface of the well via a hydraulic line in fluid contact with the piston surface of the apparatus. In this manner, the position of the piston can be influenced by an operator at the surface of the well due to conditions or needs not directly related to mass flow rate of a fluid into the apparatus. The hydraulic line can be utilize as the sole actuating means for the apparatus or can be used in conjunction with a biasing member, like a spring. In another example, the apparatus is actuated by electric means through the use of a solenoid attached to a pressure sensing device. In this example, fluid pressure inside and outside of the apparatus is measured and a pressure differential therebetween calculated. The pressure differential is compared to a stored value and a solenoid thereafter adjusts the position of the sleeve to open or close the apparatus to the flow of fluid therein. The electrical components making up this embodiment are well known to those skilled in the art.




In a gas injection well, the position of the sleeve within the flow control apparatus can be manipulated by changing the flow rate of gas injected into an adjacent wellbore or wellbores. For example, one or more flow control apparatus according to the invention may be installed along a horizontal wellbore to compensate for pressure differentials expected along the wellbore near the heel portion. In a gas injection operation, the formation around the horizontal wellbore is influenced by an injection well pumping for example, 2000 cubic meters of gas into the formation each day. If the apparatus along the wellbore do not assume the ideal position to compensate for pressure differentials, the formation pressure can be increased or decreased to urge the apparatus to the desired position. By increasing the flow rate of gas pumped into the adjacent wellbore to, for example, 2500 cubic meters per day, the formation pressure can be increased with a directly related increase in flow velocity of fluid into the apparatus. A sufficiently increased mass flow rate will cause the flow control apparatus to move to a more restricted position, thereby compensating for the pressure differential between the formation and the interior of the horizontal wellbore. Alternatively, the amount of gas injected into a formation can be reduced, causing the flow control apparatus along a horizontal wellbore to move towards an unactuated position.




There follows some alternate embodiments of apparatus, all of which are within the purview of the invention. In each case the apparatus controls the flow of fluid into a wellbore. While not necessarily depicted in all of the Figures, each embodiment can be arranged to allow fluid flow into the apparatus to be reduced, increased or shut off depending upon mass flow rate of fluid around the apparatus.





FIGS. 10

,


11


and


12


illustrate an alternative embodiment of a flow control apparatus


550


.

FIG. 10

illustrates the apparatus


550


in an open position whereby fluid, shown by arrows


585


enters the apparatus through screen portion


551


and flows through an annular area formed between an outer housing


590


and tubular member


570


. Thereafter, the fluid flows into the device through an aperture


580


formed in tubular member


570


. Control of fluid flow is determined by the position of an annular piston


560


which is affixed to an inner sleeve


565


. The annular piston


560


and inner sleeve


565


move together to selectively expose and cover aperture


580


. Annular piston


560


includes a piston surface


562


which is acted upon by the fluid flowing through the apparatus and actuates the annular piston and inner sleeve


565


against a spring


575


disposed opposite piston surface


562


.





FIG. 12

is a section view taken along lines


12





12


of FIG.


10


and further illustrates the relationship of the components of the apparatus


550


. Visible specifically in

FIG. 12

is outer housing


590


with annular piston


560


disposed therein. Annular piston


560


includes inwardly directed tab portions


587


which are housed in a slots


588


formed in tubular member


570


. As the annular piston


560


and inner sleeve


565


move axially in relation to mass fluid velocity on the piston surface


562


, the piston and inner sleeve move within the slot


588


.

FIG. 11

illustrates the apparatus


550


of

FIG. 10

in a closed or choked position. In

FIG. 11

, spring member


575


is extended and has urged the annular piston


560


and inner sleeve


565


in a direction against the flow of fluid, thereby partially closing aperture


580


to the flow of fluid therethrough.





FIG. 13

illustrates an alternative embodiment of a flow control apparatus


600


for use in a wellbore comprising an annular piston


617


having a downwardly extending piston surface


622


formed at a first end thereof. Fluid enters the flow control apparatus


600


through a screen portion


610


and flows through an annular area created between the outer surface of tubular member


615


and housing


605


. Apertures


627


formed in tubular member


615


provide access to the interior of device


600


. Piston


617


is slidably mounted and operates against spring


620


to alternatively expose and cover aperture


627


. The apparatus


600


is constructed and arranged whereby mass fluid velocity acting upon piston surface


622


deflects the piston against spring


620


, thereby exposing a greater amount of aperture


627


to the flow of fluid illustrated by arrow


625


.





FIG. 14

is an alternative embodiment of a flow control apparatus


650


including an annular piston


690


which operates to selectively expose an aperture


680


by moving axially in a slot


687


against a spring member


675


. In this embodiment, fluid enters the apparatus


650


through screen portion


651


and travels through an annular area created between tubular member


670


and outer housing


692


. Thereafter, the fluid flows into the interior of the apparatus


650


through an aperture


680


formed in tubular member


670


. The path of fluid flow is illustrated by arrow


685


. Annular piston


690


includes a piston surface


691


which is acted upon by mass fluid velocity and permits the piston to move against spring member


675


to expose a greater portion of aperture


680


to the flow of fluid


685


.





FIG. 15

is an alternative embodiment of a flow control apparatus


700


including a plurality of flexible leaf members


728


constructed and arranged to become depressed when exposed to a predetermined mass fluid velocity, thereby permitting fluid to flow into the interior of apparatus


700


. Fluid enters the apparatus through screen portion


710


and continues in an annular area formed between tubular member


715


and housing


705


. Thereafter, the fluid encounters at least one flexible leaf member


728


with surface


729


formed thereupon. At plurality of flexible leaf member


728


, as one flexible member extending around the annular area are selected and arranged whereby a predetermined amount of mass fluid flow rate will depress the flexible leaves permitting fluid flow (illustrated by arrow


725


to enter the interior of the apparatus


700


through apertures


727


formed in tubular member


715


).





FIG. 16

is an alternative embodiment of an apparatus


750


of the invention including a plurality of piston segments which move independently in relation to a perforated tubular member.

FIG. 17

is a cross-sectional view of the embodiment of

FIG. 16

taken along line


17





17


of FIG.


16


. The apparatus


750


includes a screen portion


16


where fluid enters and travels in an annular area formed between the outside of a tubular member


770


and a housing


792


therearound. The flow of fluid through and into the apparatus


750


is depicted by arrow


785


. Considering

FIGS. 16 and 17

in greater detail, the apparatus


750


includes pistons


790


which move axially within slots


795


which are formed in a ring


796


. Each piston


790


includes a sleeve portion which is integrally formed thereon and is movable with the piston to cover and expose apertures


771


formed in tubular member


770


. At a second end, the piston acts against a spring member


775


.




The apparatus


750


is designed whereby piston


790


is urged against spring


775


by a mass flow velocity of fluid travelling through the apparatus


750


. As the piston is deflected against the spring, the sleeve portion


791


of the piston uncovers aperture


771


and fluid in the annular area between the tubular member


750


and housing


792


travels into the interior of the apparatus


750


. In the absence of a sufficient mass fluid velocity the spring urges the piston against a stop ring


794


formed around the interior surface of housing


792


. In the embodiment shown in

FIG. 16

, when the piston is fully urged against stop ring


794


, the integral sleeve portion of the piston completely covers apertures


771


thereby preventing fluid flow into the apparatus


750


. Visible specifically in

FIG. 17

is the housing


792


of the apparatus


750


disposed around a ring


796


having slots


795


formed therein. A sleeve portion


799


is disposed therein around a tubular member


770


. In the embodiment illustrated in

FIG. 17

, the piston


790


is disposed around the perimeter of the apparatus and each piston is equipped with a separate spring member


775


and moves independently according to the mass fluid velocity at that location in the apparatus.




While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.



Claims
  • 1. A flow control device for use in a wellbore comprising:an inner member having at least one aperture formed therein; at least one axially movable member disposed radially outwards of the inner member to selectively cover the at least one aperture of the inner member, the movable member having a piston surface formed thereupon; a biasing member disposed adjacent the movable member and opposing axial movement of the movable member; and an outer casing disposed radially outward of the movable member.
  • 2. The flow control device of claim 1, wherein the axially movable member is a sleeve having at least one aperture formed therethrough.
  • 3. The flow control device of claim 2, wherein at least one aperture of the inner member is aligned with at least one aperture of the sleeve when the sleeve is in a first position relative to the inner member and at least one aperture of the inner member is misaligned with at least one aperture of the sleeve when the sleeve is in a second position relative to the inner member.
  • 4. The flow control device of claim 2, wherein the device is disposed in a horizontal wellbore adjacent a heel portion of the horizontal wellbore.
  • 5. The flow control device of claim 2, wherein a plurality of the devices are disposed in a wellbore having an oil bearing formation therearound.
  • 6. The flow control device of claim 2, wherein the device includes a screened portion extending from a first end thereof, the screened portion directing fluid into the device.
  • 7. The flow control device of claim 2, wherein the device further includes an attachment assembly for attachment to a screened tubular, the attachment assembly including:exterior threads formed at a first end of the device; a coupling ring to fasten the exterior threads with exterior threads of the screened tubular; and a stab portion extending from the first end of the device, the stab portion insertable into the interior of the screened tubular to form an annular area between the exterior of the stab portion and the interior of the screened tubular, the annular area forming a path for fluid flow into the device.
  • 8. The flow control device of claim 2, further comprising a solenoid member mechanically connected to the sleeve, whereby the solenoid member can cause the sleeve to move axially in relation to the inner member.
  • 9. The flow control device of claim 8, further including at least one pressure sensor for sensing a pressure value and communicating the pressure value to the solenoid.
  • 10. The flow control device of claim 3, wherein in the second position, the flow of fluid into the device is restricted by the misalignment of the apertures of the sleeve and the apertures of the inner member.
  • 11. The flow control device of claim 10, wherein the sleeve can assume any number of positions between the first and second position, each of the any number of positions creating a different amount of misalignment between the apertures of the sleeve and the apertures of the inner member.
  • 12. The flow control device of claim 11, wherein the apertures are substantially misaligned in a first and second positions but are substantially aligned in a central position.
  • 13. The flow control device of claim 10, wherein the device restricts the flow of fluid in a first and second position but permits the unrestricted flow of fluid in a center position.
  • 14. The flow control device of claim 10, wherein the device permits the unrestricted flow of fluid in a first and second position but restricts the flow of fluid in a center position.
  • 15. The flow control device of claim 10 further comprising a piston surface formed on the sleeve opposite the biasing member, the piston surface constructed and arranged to be acted upon by the fluid flow into the flow control device.
  • 16. The flow control device of claim 15, wherein the position of the sleeve is determined at least in part by the mass flow rate of the fluid flowing into the flow control device.
  • 17. The flow control device of claim 15, wherein the position of the sleeve is determined at least in part by a difference in fluid pressure between the fluid outside of the device and the fluid inside of the device.
  • 18. The flow control device of claim 15, wherein the device includes a connection member for a hydraulic control line to place hydraulic fluid in communication with the piston surface of the sleeve.
  • 19. The flow control device of claim 18, wherein the hydraulic fluid provides additional biasing to oppose axial movement of the sleeve.
  • 20. A method of controlling the fluid flow into a hydrocarbon producing wellbore comprising:inserting a flow control apparatus into the wellbore adjacent a fluid bearing formation such that the fluid in the formation is in communication with an outer surface of the apparatus; causing the fluid to act upon a piston surface formed on an axial movable sleeve in the apparatus; and causing the sleeve to shift in reaction to a predetermined mass flow rate of fluid, thereby misaligning apertures formed in the sleeve with apertures formed in an inner member of the apparatus.
  • 21. The method of claim 20, further including changing the mass flow rate of fluid by changing the amount of gas injected into the formation from an adjacent gas injection well.
  • 22. A flow control device for use in a wellbore comprising:an inner member having at least one aperture therethrough; an outer body disposed around the inner member with an annular area formed therebetween; a flexible, flow restriction member disposed in the annular area, the flow restriction member constructed and arranged to deform and reform to permit a variable flow of a fluid to pass through the annular area and into at least one aperture.
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Foreign Referenced Citations (1)
Number Date Country
WO 0045031 Aug 2000 WO
Non-Patent Literature Citations (1)
Entry
PCT International Search Report for International Application PCT/US00/02420 mailed May 11, 2000.