Method and apparatus for stimulating multiple intervals
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-034/10
E21B-043/14
E21B-034/14
E21B-043/26
E21B-034/00
출원번호
US-0579278
(2014-12-22)
등록번호
US-10221656
(2019-03-05)
발명자
/ 주소
Barton, Ryan
Wall, Tyler
Jackson, Stephen Lee
Basanta, Ledif
출원인 / 주소
Sagerider, Incorporated
대리인 / 주소
McAfee & Taft
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A system and process relating to well fracturing and stimulation operations are provided. The system and process allow for fracturing multiple zones in a wellbore. The system and process provide for introducing a fluid through a plurality of spaced-apart sleeve assemblies wherein each sleeve assembl
A system and process relating to well fracturing and stimulation operations are provided. The system and process allow for fracturing multiple zones in a wellbore. The system and process provide for introducing a fluid through a plurality of spaced-apart sleeve assemblies wherein each sleeve assembly can be in an operable state which allows the sleeve assembly to be open or closed and can be in a non-operable state which prevents the sleeve assembly from opening or closing.
대표청구항▼
1. A system for fracturing multiple zones in a wellbore comprising: a hydraulic input line;a hydraulic output line;a plurality of spaced-apart sleeve assemblies, each sleeve assembly defining a central passage therethrough, the sleeve assemblies being selectively switchable between an open position
1. A system for fracturing multiple zones in a wellbore comprising: a hydraulic input line;a hydraulic output line;a plurality of spaced-apart sleeve assemblies, each sleeve assembly defining a central passage therethrough, the sleeve assemblies being selectively switchable between an open position and a closed position, wherein in the open position a fluid may be communicated between the central passage of the sleeve assembly and the exterior of the sleeve assembly, wherein each sleeve assembly comprises: an outer case;a mandrel positioned within the outer case so as to define an annular space;a first coupling connected to a first end of the outer case and a first end of the mandrel;a second coupling connected to a second end of the outer case and a second end of the mandrel;a piston disposed in the annular space so as to define a first end of the annular space between the piston and the first coupling, and define a second end of the annular space between the piston and the second coupling, wherein said piston is moveable within the annular space such that movement of the piston determines whether the sleeve assembly is in the open position or the closed position, and wherein the piston is moveable by a fluid such that the sleeve assembly is repeatedly switchable between the open position and the closed position;a first ported fitting in fluid flow communication with the first end of the annular space through a first plurality of passageways defined on an outer surface of the first coupling;a second ported fitting in fluid flow communication with the second end of the annular space through a second plurality of passageways defined on an outer surface of the second coupling; anda controller having a switch, the switch being electrically activated to complete an hydraulic circuit such that the first ported fitting is in fluid flow communication with the hydraulic input line and the second ported fitting is in fluid flow communication with the hydraulic output line, and when the switch is not electrically activated the hydraulic circuit is broken, and wherein completion of the hydraulic circuit allows the fluid to move the piston such that the sleeve assembly is switched between the open and closed position; anda tubing encapsulated conductor which transfers an electrical signal between the controller and a control unit at a surface location outside the wellbore, and wherein the switch is activated when the electrical signal matches an address for the controller. 2. The system of claim 1, wherein said control unit is configured to both send said electrical signal and to detect an increase in current indicative of said switch being activated. 3. The system of claim 2, wherein each controller has an address which is unique to that controller, whereupon the controller completes the hydraulic circuit upon receipt of a unique signal that corresponds to the unique address for the controller. 4. The system of claim 2, the system further comprising: a source of fluid, wherein when the hydraulic circuit is complete, there is fluid flow communication between the source of fluid and the first end of the annular space through the first ported fitting and the first plurality of passageways to move the fracturing device between the open position and the closed position, and wherein fluid flow communication is prevented when the hydraulic circuit is broken. 5. The system of claim 4, wherein the second ported fitting is configured so that, when one of the sleeve assemblies is moved to the open position, fluid flows from the second end of the annular space through the second plurality of passageways to the second ported fitting and, when the fracturing device is moved to the closed position, fluid flows from the second ported fitting through the second plurality of passageways to the second end of the annular space. 6. The system of claim 4, wherein the piston is locked against movement when the hydraulic circuit is broken. 7. The system of claim 1, wherein each sleeve assembly is operable independently of the other of the sleeve assemblies. 8. An apparatus for fracturing multiple zones in a well comprising: a plurality of tubing-deployed fracturing devices selectively switchable between an open position and a closed position, each fracturing device having a unique address and wherein each fracturing device comprises: a sleeve assembly comprising an outer case, a mandrel, a first coupling, a second coupling and a piston, wherein the mandrel is positioned within the outer case so as to define an annular space; the first coupling is connected to a first end of the outer case and a first end of the mandrel, the second coupling is connected to a second end of the outer case and a second end of the mandrel, and the piston being disposed in the annular space so as to define a first end of the annular space between the piston and the first coupling, and define a second end of the annular space between the piston and the second coupling;a first ported fitting in fluid flow communication with the first end of the annular space through a first plurality of passageways defined on a surface of the first coupling;a second ported fitting in fluid flow communication with the second end of the annular space through a second plurality of passageways defined on a surface of the second coupling;a first control unit at a surface location outside the wellbore, wherein the first control unit is configured to send the unique electrical signal;a second control unit having a switch configured to complete and break a hydraulic circuit in response to a unique electrical signal corresponding to the unique address, and thus moving the fracturing device between an operable state and a non-operable state, wherein in the operable state the first ported fitting is in fluid flow communication with a source of fluid, and in the non-operable state the first ported fitting is not in fluid flow communication with the source of fluid and wherein in the operable state the fracturing device is repeatedly moveable between the open and closed positions such that fluid from the source of fluid is introduced into the first end of the annular space through the first ported fitting and the first plurality of passageways to move the fracturing device to the open position, and wherein, when the fracturing device is in the open position, a zone intersected by the well may be fractured therethrough; anda tubing encapsulated conductor which transmits the unique electrical signal between the first control unit and second control unit. 9. The apparatus of claim 8, wherein the piston is movable in the annular space when the hydraulic circuit is complete, and wherein the piston is prevented from moving when the hydraulic circuit is broken. 10. The apparatus of claim 9, wherein the switch has the unique address such that upon receipt of the unique signal the switch will open and close the hydraulic circuit. 11. The apparatus of claim 9, wherein the second ported fitting is configured so that, when the fracturing device is moved to the open position, fluid flows from the second end of the annular space through the second plurality of passageways to the second ported fitting and, when the fracturing device is moved to the closed position, fluid flows from the second ported fitting through the second plurality of passageways to the second end of the annular space. 12. The apparatus of claim 9, the hydraulic circuit comprising: an opening line in fluid flow communication with the first ported fitting; anda closing line in fluid flow communication with the second ported fitting; andwherein fluid introduced through the opening line moves the piston to the open position, and fluid introduced through the closing line moves the piston to the closed position when the hydraulic circuit is completed. 13. The apparatus of claim 12, further comprising a single opening line for providing fluid to the first ported fitting of each fracturing device. 14. The apparatus of claim 13, further comprising a single closing line for communicating fluid to and from the second ported fitting of each fracturing device. 15. A method of fracturing a plurality of zones in a wellbore comprising: (a) lowering a plurality of fracturing devices on a tubing into the wellbore so that each of the fracturing devices is adjacent to one of the zones, wherein each fracturing device comprises: a sleeve assembly comprising an outer case;a mandrel positioned within the outer case so as to define an annular space;a first coupling connected to a first end of the outer case and a first end of the mandrel;a second coupling connected to a second end of the outer case and a second end of the mandrel; anda piston disposed in the annular space so as to define a first end of the annular space between the piston and the first coupling, and define a second end of the annular space between the piston and the second coupling, wherein the piston is moveable within the annular space such that movement of the piston determines whether the sleeve assembly is in the open position or the closed position, and wherein the piston is moveable by fluid such that the sleeve assembly is repeatedly switchable between the open position and the closed position;(b) sending an electrical signal from a surface location outside the wellbore to one of the fracturing devices by a tubing encapsulated conductor so as to move the fracturing device to an operable mode to thus actuate the fracturing device, wherein in the operable mode a hydraulic circuit is completed for the fracturing device;(c) opening the actuated fracturing device by introducing fluid to a first ported fitting which is in fluid flow communication with the first end of the annular space through a first plurality of passageways defined on a surface of the first coupling, wherein the introducing of fluid results in fluid leaving the second end of the annular space through a second plurality of passageways defined on a surface of the second coupling and a second ported fitting which is in fluid flow communication with the second plurality of passageways;(d) fracturing the zone adjacent to the actuated fracturing device, the fracturing occurring by pumping fracturing fluid through the first fracturing device;(e) closing the actuated fracturing device after fracturing fluid is pumped into the first zone by introducing fluid into the second end of the annular space through the second ported fitting and the second plurality of passageways, wherein the introducing of fluid into the second end results in fluid leaving the first end of the annular space through the first plurality of passageways and the first ported fitting; and(f) repeating steps (a)-(d) for at least one additional of the fracturing devices. 16. The method of claim 15, wherein the sending step comprises sending a unique electrical signal to actuate use of each fracturing device independent of the other of the fracturing devices. 17. The method of claim 15, further comprising cementing the fracturing devices in the well prior to the opening step. 18. The method of claim 15, further comprising, for the fracturing device that is opened in step (b): deactivating the fracturing device between the opening and fracturing steps;reactivating the fracturing device after the fracturing step and before the closing step; anddeactivating the fracturing device after the closing step. 19. The method of claim 18, further comprising, after steps (a)-(f) have been performed for a desired number of the plurality of fracturing devices, reactivating selected of the fracturing devices, opening the selected of the fracturing devices to allow formation fluid to enter the fracturing devices, and communicate formation fluid to the surface. 20. The method of claim 18, further comprising selectively opening a portion of the fracturing devices, to communicate fluid from the zones adjacent the selected fracturing devices into the tubing. 21. The method of claim 15, further comprising determining whether a fracturing device has been moved to the operable mode by detecting an increase in current.
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