EP2783068A1 - Inflow control solutions for wellbores - Google Patents
Inflow control solutions for wellboresInfo
- Publication number
- EP2783068A1 EP2783068A1 EP12851451.0A EP12851451A EP2783068A1 EP 2783068 A1 EP2783068 A1 EP 2783068A1 EP 12851451 A EP12851451 A EP 12851451A EP 2783068 A1 EP2783068 A1 EP 2783068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- port
- sleeve valve
- mill
- sliding sleeve
- inflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 238000000034 method Methods 0.000 claims description 19
- 238000003801 milling Methods 0.000 claims description 15
- 230000004936 stimulating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 29
- 238000011282 treatment Methods 0.000 description 28
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000638 stimulation Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000007373 indentation Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000609802 Kobus kob Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Definitions
- the invention relates to a method and an apparatus for wellbore fluid handling and, in particular, to a method and an apparatus for selective communication to a wellbore for fluid treatment and for effectively handling produced fluids.
- An oil or gas well relies on inflow of petroleum products. It may be advantageous in certain circumstances to control the inflow of produced fluids. For example, it may be advantageous to screen the produced fluids before they enter the tubing string. In addition or alternately, the produced fluids may require flow rate control, as by use of chokes that are sometimes called inflow control devices (ICDs).
- ICDs inflow control devices
- the well may require wellbore treatment termed stimulation. This is accomplished by pumping stimulation fluids such as fracturing fluids, acid, cleaning chemicals and/or proppant laden fluids to improve wellbore inflow.
- the well is isolated in segments and one or more segments are individually treated so that concentrated and controlled fluid treatment can be provided along the wellbore by injecting the wellbore stimulation fluids from a tubing string through a port in the segment and into contact with the formation, After wellbore fluid treatment, the stimulation fluids are sometimes allowed to back flow from the formation into the wellbore tubing string. Thereafter, fluids are produced from the formation. In some embodiments, the produced fluids also enter the tubing string for flow to the surface. Where a wellbore frac tool also provides for inflow control, it is useful if fracing fluids not be forced out through the same ports that offer inflow control.
- a selectively openable inflow control sub comprising: a tubular body including a wall defining an outer surface and an inner bore, an inflow port through the wall of the tubular body, an inflow controller to control inflow through the inflow port and a sliding sleeve valve slidable within the inner bore between a closed-port position, closing the inflow port, and an open-port position, opening the inflow port to fluid flow therethrough, the sliding sleeve valve being axially moveable from the closed-port position and the open-port position by pushing the sleeve with a mill string.
- a method for a wellbore operation comprising: running a tubing string into a wellbore to a desired position for treating the wellbore; running a mill through the tubing string to apply an axially directed force to a sliding sleeve valve to move the sliding sleeve valve axially through the tubing string from one position to another position; and removing the mill from the tubing string.
- Figures 1 are side elevation and sectional views through a wellbore inflow control sub.
- Figures 2 show a wellbore sub. Specifically Figure 2a and 2b, are side elevation and sectional views through a wellbore sub including both an inflow controller and a wellbore treatment mechanism. Figures 2c to 2h show a wellbore operation employing the sub.
- Figures 3a to 3f are sectional views through a wellbore string installed in a wellbore and show a wellbore operation employing the wellbore string.
- Figure 4a to 4d are enlarged portions of components of the sleeves of Figures 3.
- Figures 5 a to 5 c are sectional views through wellbores with tubing strings installed therein. DESCRIPTION OF VARIOUS EMBODIMENTS
- This invention relates to solutions for selectively openable inflow control in a wellbore including a sub, a wellbore treatment string and a method for wellbore operations.
- the inflow control can be by screening, choking, etc.
- the term inflow controller is employed to reference a mechanism for inflow control including screens (i.e. including mesh, sintered discs, filtering media, etc.) and chokes (i.e. ICDs, restricted orifices, labyrinth channels, gates, remotely controlled valves, etc.)
- a method for a wellbore operations includes running a tubing string into a wellbore to a desired position for performing an operation in the wellbore; running a mill through the tubing string to apply an axially directed force to a sliding sleeve valve to move the sliding sleeve valve axially through the tubing string from one position to another position; and removing the mill from the tubing string. While the force is normally directed as the mill is run down into the tubing string, it is possible that the force could be applied when returning the milling back toward surface.
- the sliding sleeve valve controls the open and closed condition of a fluid port and the force moves the sleeve to open or close the port.
- a selectively openable inflow control sub includes a tubular body including a wall defining an outer surface and an inner bore, an inflow port through the wall of the tubular body, an inflow controller to control inflow through the inflow port and a sliding sleeve valve in the bore slidable within the bore between a closed-port position, closing the inflow port, and an open-port position, opening the inflow port to fluid flow therethrough.
- the sliding sleeve valve is axially moveable from the closed-port position and the open-port position by pushing the sleeve with a mill string.
- the sliding sleeve valve includes a mill protrusion that defines a diameter less than the milling diameter for the tubular body.
- the mill protrusion includes a singular, plural or annular protrusion that extends into the bore and constricts the inner diameter of the bore at that location to be less than the milling diameter.
- the milling diameter is about the same as the drift diameter through the bore.
- the sleeve only becomes stopped against further axial movement through the bore when the sleeve reaches its open-port position.
- the bore is free of any obstructions to the axial sliding movement of the sleeve until the sleeve is positioned in the open-port position.
- Figures 1 disclose a selectively openable inflow control sub 10.
- Figure la shows a side elevation of the sub and
- Figure lb shows a sectional view along long axis x of the sub.
- Sub 10 includes a tubular body 12 including a wall defining an outer surface 12a and an inner bore 12b and ends 12c, 12d.
- the ends are formed for connection into a tubing string.
- ends 12c, 12d are threaded. Because the operation of the sub, one end 12c is considered the upper end and the other end 12d is considered the lower end. In operation, upper end 12c is secured uphole from lower end 12d.
- the wall is illustrated as formed in parts, this is for ease of manufacture and, of course, modifications may be made thereto for example, to construct the wall as a single piece or in many pieces connected together.
- Sub 10 further includes an inflow port 14 extending through the wall and, thereby, providing a fluid flow path between outer surface 12a and inner bore 12b.
- An inflow controller is positioned to control flow through inflow port 14.
- the inflow controller includes a screen 18 and a choking nozzle 20 in the inflow port.
- other, fewer or additional inflow controllers may be employed, as desired.
- a choking nozzle 20 is installed in port 14, an operator may prefer in some applications to leave port 14 unchoked.
- the inflow port includes a wide annular recess on the outer surface, which is covered by screen 18 and a production sleeve 21.
- Production sleeve 21 closes off the annular recess and forms an annular space 14a about the tubular wall that is a part of inflow port 14 and leads to inner bore 12b.
- Inflow port 14 is normally closed by a sleeve valve 22, but can be opened during milling through inner bore 12b.
- Sleeve 22 includes a mill protrusion 24 against which the mill will be temporarily butted during its advancement. When the mill butts against the mill protrusion, a push force must be applied to mill out the mill protrusion. However, by installation of the sleeve 22 in a closed-port position such that it is free to slide down in inner bore, the push force of the mill applied against the mill protrusion can be enough to move the sleeve.
- the sleeve is normally retained in its installed, run in position by a releasable lock that provides a holding force to resist inadvertent movement to the open-port position
- a releasable lock that provides a holding force to resist inadvertent movement to the open-port position
- Common releasable locks include shear pins 26, as shown, collets, snap rings, detents, etc. If a releasable lock is employed, the holding force of the releasable lock is selected also to be overcome by the push force of the mill applied against the mill protrusion.
- Mill protrusion 24 is mounted or formed on sleeve and can be any protrusion that projects into inner bore 12b and forms an inner diameter (ID) therepast that is smaller than the outer diameter (OD) of the mill. Generally the mill OD is substantially equal to the desired drift diameter (IDd) of the inner bore. Thus, mill protrusion 24 is a protrusion that projects to define an ID less than IDd.
- the mill protrusion can, for example, be any singular, plural or annular protrusion on the sleeve's inner surface.
- Mill protrusion 24, for example as shown, can be in the form of a ball stop, which is often a frustoconical surface tapering from upper end to lower end.
- the mill protrusion need not have any particular ID. For example, where a ball seat form is used, it can be run with any ball seat size.
- Sleeve 22 is sized relative to the space between port 14 and wall 28 such that the sleeve can move from an overlapping position over port 14 before it is stopped against wall 28.
- Sleeve 22 is positioned in an annular recess, one end of which is wall 28 and the annular recess is free of any lower stops other than wall 28 so that the mill protrusion can only start to mill through the mill protrusion against which it is butted until the sleeve is stopped against wall 28 and therefore when sleeve is clear of port.
- Sub 10 may further include seals 30 between sleeve 22 and the wall to seal against leakage through port 14 when the sleeve is in the closed-port position.
- the sleeve is retained from spinning in its installed and moved positions, as by use of a torque pin/slot 32a, 32b. This is useful as it allows the sleeve mill protrusion to be held against rotation so that it can be milled through when the sleeve hits wall 28.
- Sleeve 22 may have a profile 34, such as an annular recess, for engagement by a shifting tool to provide for a contingency shifting operation.
- the profile is recessed out of the drift inner diameter IDd such that it remains even after milling through the sleeve.
- Sleeve 22 may include another releasable lock that holds the sleeve in the port-open position, so it doesn't inadvertently slip back into the port-closed position.
- a snap ring 36 is carried on sleeve and a groove 38 is positioned in the annular recess to catch the snap ring.
- the snap ring is ramped such that it can be forced out of engagement with the groove if a shifting tool engages the sleeve and seeks to slide it.
- the groove and snap ring are positioned to engage when the sleeve is moved clear of the port.
- This milling may be solely to open the inflow-controlled port or to remove other string constrictions such as ball seats.
- the selectively openable sub of Figures 1 may be run with a wellbore treatment port.
- inflow port is closed during wellbore treatments such as fracturing such that high pressure flows do not pass through inflow port 14.
- the tubular can be installed in a tubing string by connecting other tubulars on its top and bottom sub ends.
- a selectively openable inflow control sub 1 10 having an inflow controller in combination with a fluid treatment port, herein shown as a frac port 140.
- the frac port is openable when a fluid treatment is to be carried out through the frac port.
- frac port 140 is closed with a frac sleeve 142 that has a ball seat 144 formed on its inner facing surface, The frac sleeve can be moved to open the frac port by dropping a suitably sized ball 146 that lands in seat 144, creates a seal thereacross forming a piston effect across which a pressure differential can be established to move the ball and sleeve.
- a lock member such as a snap ring 150, may be employed to lock the sleeve in its final position.
- the production (inflow) ports 1 14 can be opened.
- the production ports may be closed by a sleeve 122 that carries a mill protrusion 124 that protrudes into the inner bore and presents a diameter ID less than the drift diameter IDd of the bore.
- a mill can be run into the hole.
- the mill generally being sized to open the inner bore to its full open IDd, will butt and apply a pushing force against mill protrusion 124 as it moves through the string. Milling through the string, therefore, automatically opens the production ports, while also removing any ball seats for opening of the inner bore to full open drift diameter IDd.
- Sleeve 122 for the production ports 1 14 may be moveable to close the frac ports 140, while opening the production ports.
- inflow controller includes a screen 1 18.
- Screen 1 18 has a mesh size to occlude proppant used in the frac treatment.
- Seat 144 has an inner diameter less than the diameter ID across the mill protrusion.
- Ball 146 with an outer diameter less than ID but greater than the seat inner diameter, the ball can pass through sleeve 122 without operating it and then land on seat 144 and open sleeve 142.
- FIG. 1 The operation of the sub of Figures 1 and 2 may be better understood by reference to Figures 2b to 2h.
- the sub is run into a wellbore 104 in the condition shown in Figure 2b.
- a ball 146 is launched to pass through the string 102 into which the sub is connected.
- the ball can pass through protrusion 124, but lands and seals on seat 144 of sleeve 142.
- the ball causes a piston effect to be generated on sleeve 142 and a pressure differential develops that overcome the holding force of shear pins 148. As shown in Figure 2d, this allows sleeve 142 to move clear of the fluid treatment ports 140 and fluid, arrows F, can exit inner bore 1 12b and contact the formation.
- the well may be flowed back, arrows BF, wherein fluids from the wellbore flow back into the string inner diameter 1 12b.
- Back flow may be permitted through ports 140.
- This process may be additionally beneficial in this method, since such fluids can pass through ports 140 but may clog the screen 1 18 once production flow is opened.
- the frac ports 140 are closed and production ports 1 14 are opened. To do so, a mill 160 is run through inner bore 1 12b of string 102 to open up the seats.
- Mill 160 has an OD that opens the well substantially to IDd and therefore acts upon mill protrusion 124 of sleeve 122 and seat 144 of sleeve 142.
- a push force is applied to protrusion 124. Since sleeve 122 is unobstructed other than by shear pins 126, once the force is sufficient to overcome shear pins 126, the sleeve moves down instead of being milled up.
- sleeve 122 By installing sleeve 122 in a position where it can be moved down and selecting the shear pin holding force to be less than the force required to mill the protrusion, this ensures that the mill pushes the sleeve rather than mills into protrusion 124, even though protrusion 124 is formed of a millable material.
- Sleeve 122 moves down until it is stopped against the upper end of sleeve 142. This movement of sleeve 122 opens production ports 1 14 and closes frac ports 140. In particular, sleeve 122 is moved to be clear of ports 1 14 and is repositioned to overlie frac ports 140. When sleeve 122 butts against upper end of sleeve 142, it is stopped against further axial movement. Continued force on mill 160, removes protrusion 124.
- the milling operation can proceed and, for example, seat 144 may be milled out as well. Thereafter, the mill may be removed.
- the string is left with a full open diameter generally equal to IDd.
- Production, arrows P, from the reservoir 104 passes through the inflow controller, herein screen 1 18, and port 1 14. Because of screen 1 18, hydrocarbons free of oversize matter are produced into the inner bore 1 12b and thereafter to surface. Proppant, if any, from the fluid treatment remains in place in the annulus. No flow is possible through frac ports 140, as sleeve 122 remains thereover. Sleeve 122 may carry seals 130 that are positioned to straddle ports 140 when in the overlying position.
- Figures 3 show another string 202 in position in a wellbore 204.
- the string includes a selectively openable and recloseable inflow control sub 210 connected adjacent a selectively openable and closeable fluid treatment sub 21 1.
- the string components are connected such that they share a common inner bore 202b through which tools and fluids may be conveyed.
- an inflow controlled inflow port 214 may be opened while the frac port 240 is closed.
- the illustrated string includes selectively openable and reclosable inflow control sub 210 with a production sleeve 222 over inflow port 214.
- Inflow port 214 extends from outer surface 212a of the sub to the inner bore 212b and has mounted therein a sand screen 218 and a flow restrictor 220.
- Production sleeve is moveable to open and close port 214.
- sleeve 222 has an opening 223 that can be moved into or out of alignment with port 214 to open or close it.
- Production sleeve 222 carries a mill protrusion 224 that extends into inner bore 202b and presents a constriction having an inner diameter less than the normal full open diameter of inner bore 202b.
- Sleeve 222 is positioned in an annular groove in the inner wall of the sub and is positioned with a space between the lower end 222a of the sleeve and end wall 228 of the groove. Sleeve 222 is held in this position by a releasable locking member, here a collapsible snap ring 226a engaged in a groove 226b.
- a releasable locking member here a collapsible snap ring 226a engaged in a groove 226b.
- Production sleeve 222 includes profiles 234a, 234b for accepting engagement with a shifting tool.
- Selectively openable and closeable fluid treatment sub 21 1 includes a sleeve closure 242 over its frac port 240.
- Sleeve closure 242 is axially moveable through inner bore 202b from a port- closed position to a port-open position.
- Sleeve closure 242 includes a ball seat 244 and a ball may be landed thereon to provide the axial force required to move the sleeve.
- Sub 21 1 includes a closing sleeve 252 that is axially moveable through inner bore 202b from a retracted position to a port-closing position.
- Closing sleeve 252 includes a mill protrusion 254 thereon that extends into inner bore 202b and presents a constriction having an inner diameter less than the normal full open diameter of bore 202b. Closing sleeve 252 is normally held in the retracted position by releasable locking structure, herein shear pins 256. Closing sleeve 252 includes profiles 258a, 258b for accepting engagement with a shifting tool.
- the inner diameters through mill protrusions 224 and 254 are greater than the inner diameter across ball seat 244.
- the ball may or may not be flowed back, arrows BF, to surface.
- Back flow may proceed through ports 240, as they are already open and present a substantially unrestricted inlet to string 202.
- a mill 260 is run in, which opens inflow port 214 and closes the fracturing port 240, while milling out the mill protrusions 224, 254 and the seat 244.
- the mill when being advanced through string 202, bears against anything in its path.
- mill 260 can be pushed down from surface and lands against the mill protrusion on sleeve 222 and the mill protrusion on sleeve 252 and applies a pushing force to overcome their releasable holding mechanisms 226a, 256, respectively and to move each sleeve until the sleeves each become stopped.
- the mill mills through the mill protrusion on that sleeve.
- Both the production sleeve 222 and the frac port closing sleeve 252 are moved in the same way.
- Figure 3e shows a stage in the milling operation wherein sleeve 222 has been moved to open port 214, the mill protrusion of sleeve 222 has been milled out and mill 260 has butted against protrusion 254 and pushed closing sleeve 252 to the port-closed position. Continued movement of the mill downhole, arrow M, will mill off mill protrusion 254 and ball seat 244.
- each of the production sleeve 222 and the frac port closing sleeve 252 can have different forms of shifting tool profiles 234a/b, 258a/b, respectively, so there is no mistaking which part is being shifted.
- the profiles can be formed differently by selecting the axial length LI of the profile indentation and/or the length L2 of the sleeve surfaces about the profile. Note that the lengths LI of the indentations 234a, 258a differ, with indentation 234a having a shorter axial length than indentation 258a and the shift tools intended to be used to shift the sleeves can be formed with considereation as to the lengths LI and L2.
- profile 234a on sleeve 222 can be engaged by shift tool 266 but cannot accept engagement with a larger shift tool key 268, Figure 4b, Likewise, as shown in Figure 4c compared to Figure 4d, sleeve 252 has a longer length profile 258a intended to be engaged by larger shift tool key 268, but will not accept engagement with key 266.
- a shifting tool with the appropriate key can be employed depending on which sleeve is to be moved and in which direction (uphole or downhole).
- a shifting tool can be run right through the string, knowing it can only engage the profiles with which it is formed (i.e. sized or shaped) to fit.
- a string 302 has a plurality of packers 370 that can be set in the wellbore 304 to form a plurality of isolated stages I, II, etc.
- the strings are each installed in an open hole (uncased), horizontal section of the well.
- the strings may be employed in wells that are cased and/or non-horizontal, as desired.
- each stage includes a sub 310a including a fluid treatment section including fluid treatment ports 340a and an inflow controlled section, including a screened interval 318a.
- This sub for example, may be similar to that described above in respect of Figure 2b or 3a.
- each stage includes a sub 310b' including a fluid treatment section including fluid treatment ports 340b and an inflow controlled section, including a screened interval 318b'.
- Each stage also includes another sub 310b" intended only for controlled inflow, having a screened interval 318b" but without fluid treatment ports.
- Sub 310b" may be similar to that described above in respect of Figure lb and sub 310b' may be similar to that described above in respect of Figures 2b or 3a.
- This string configuration allows both fluid treatment and controlled inflow in each section. However, the opportunity for inflow is greater than that in Figure 5a.
- the number of subs intended only for inflow can be selected as desired. While two per stage are shown here, other numbers are possible.
- each stage includes one or more subs 310c for inflow control.
- This string configuration allows controlled inflow in each section, but is not well suited for wellbore treatment with high pressure outward flows.
- Such a string may be employed for example, in a well that has been previously treated or requires no treatment, but where it is desired to control the open/closed condition of the inflow ports and in stages.
- a plurality of combination subs may be used in a single stage, if deformable balls or seats, openable kobes or shiftable subsleeves are employed.
- the strings may be employed in wellbore operations.
- the string 302 of Figure 5b may be run in and set in place in the well. This may include setting plurality of packers 370.
- the string includes ports 340b and fluid inflow ports beneath screens 318b', 318b", the tubing string can hold pressure when these ports are closed by internal sleeves and, in one embodiment, packers may be set by pressuring up the string,
- stages may be defined in the well. Each stage is between a pair of adjacent packers, which therebetween create an isolated interval.
- balls are dropped to sequentially open the frac ports 340b. Because there are ball seats in all stages of this embodiment, the ball for opening the frac ports in the most distal stage, stage I, is the smallest and each ball for each stage closer to surface is progressively larger.
- a ball is dropped to open the fracturing port and pumping fluid through the opened ports 340b then stimulates the stage. This is repeated until all stages are fraced. Thereafter, the balls may be produced back or left in the string. All of this occurs with the ports closed beneath screens 318b', 318b", thus screens do not become contaminated by fluid treatment gels, proppant, etc.
- the sleeves covering the production ports are opened by pushing on their mill protrusions. Movement of the mill also closes ports 340b.
- production sleeve movement by mill opens the production ports and closes the frac ports or mill moves a closing sleeve. With the production ports open, the mill can be removed and produced fluids can be screened, and perhaps pressure regulated, as they enter the tubing string in their flow towards surface.
- a screen is used to control inflow through the production port, but other inflow control mechanisms may be employed.
- inflow control may be provided by a labyrinth channel system, a choke, a nozzle, an erodible disc, etc.
- the inflow control mechanism is adjustable and in one embodiment remotely adjustable, such as while positioned downhole.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Crushing And Grinding (AREA)
- Sliding Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161562237P | 2011-11-21 | 2011-11-21 | |
US201261613297P | 2012-03-20 | 2012-03-20 | |
PCT/CA2012/050831 WO2013075235A1 (en) | 2011-11-21 | 2012-11-20 | Inflow control solutions for wellbores |
Publications (2)
Publication Number | Publication Date |
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EP2783068A1 true EP2783068A1 (en) | 2014-10-01 |
EP2783068A4 EP2783068A4 (en) | 2016-01-13 |
Family
ID=48468951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12851451.0A Withdrawn EP2783068A4 (en) | 2011-11-21 | 2012-11-20 | Inflow control solutions for wellbores |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140345876A1 (en) |
EP (1) | EP2783068A4 (en) |
AU (1) | AU2012343259A1 (en) |
BR (1) | BR112014012189A2 (en) |
CA (1) | CA2856474A1 (en) |
WO (1) | WO2013075235A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014137314A1 (en) * | 2013-03-04 | 2014-09-12 | Halliburton Energy Services, Inc. | Abandonment and containment system for gas wells |
US20160312560A1 (en) * | 2015-04-22 | 2016-10-27 | Baker Hughes Incorporated | Method of Milling With Shifting Tool Capabilities |
WO2017041105A1 (en) * | 2015-09-04 | 2017-03-09 | National Oilwell Varco, L.P. | Apparatus, systems and methods for multi-stage stimulation |
WO2017074376A1 (en) * | 2015-10-29 | 2017-05-04 | Halliburton Energy Services, Inc. | Shiftable isolation sleeve for multilateral wellbore systems |
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2012
- 2012-11-20 US US14/359,682 patent/US20140345876A1/en not_active Abandoned
- 2012-11-20 CA CA2856474A patent/CA2856474A1/en not_active Abandoned
- 2012-11-20 EP EP12851451.0A patent/EP2783068A4/en not_active Withdrawn
- 2012-11-20 BR BR112014012189A patent/BR112014012189A2/en not_active Application Discontinuation
- 2012-11-20 AU AU2012343259A patent/AU2012343259A1/en not_active Abandoned
- 2012-11-20 WO PCT/CA2012/050831 patent/WO2013075235A1/en active Application Filing
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BR112014012189A2 (en) | 2017-05-30 |
AU2012343259A1 (en) | 2014-06-12 |
CA2856474A1 (en) | 2013-05-30 |
WO2013075235A1 (en) | 2013-05-30 |
EP2783068A4 (en) | 2016-01-13 |
US20140345876A1 (en) | 2014-11-27 |
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