Methods of operating well bore stimulation valves
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-034/10
E21B-034/06
E21B-043/26
E21B-034/14
E21B-043/14
출원번호
US-0963787
(2013-08-09)
등록번호
US-9670750
(2017-06-06)
발명자
/ 주소
Chauffe, Stephen J.
출원인 / 주소
TEAM OIL TOOLS, LP
대리인 / 주소
MH2 Technology Law Group, LLP
인용정보
피인용 횟수 :
2인용 특허 :
4
초록▼
Methods of controlling flow into a formation through the use of a stimulation valve in a tubular assembly installed in a well. Fluid is pumped into the formation through one or more ports in the stimulation valve. The stimulation valve defines a conduit for flow of fluids through the stimulation val
Methods of controlling flow into a formation through the use of a stimulation valve in a tubular assembly installed in a well. Fluid is pumped into the formation through one or more ports in the stimulation valve. The stimulation valve defines a conduit for flow of fluids through the stimulation valve. The ports are adapted to allow flow of fluids between the conduit and the exterior of the stimulation valve and to receive a ball sealer for shutting off flow of fluids through the ports. The ports then are closed by introducing a plurality of ball sealers into the fluid. The fluid carries the ball sealers into the valve where they seat on and shut off flow of the fluid through the ports.
대표청구항▼
1. A method of controlling flow into a formation through the use of a stimulation valve in a tubular assembly installed in a well passing through said formation, said method comprising: (a) aligning a plurality of openings in a sleeve of said stimulation valve with a plurality of ports in a mandrel
1. A method of controlling flow into a formation through the use of a stimulation valve in a tubular assembly installed in a well passing through said formation, said method comprising: (a) aligning a plurality of openings in a sleeve of said stimulation valve with a plurality of ports in a mandrel of said stimulation valve to allow fluid to flow from a conduit of said stimulation valve to an exterior of said stimulation valve;(b) pumping fluid through said tubular assembly and into said formation through said ports and said openings; and(c) preventing said fluid from flowing through said ports and said openings by introducing a plurality of ball sealers into said fluid being pumped through said tubular assembly and allowing said ball sealers to be carried by said fluid into said conduit of said stimulation valve, said flow of said fluid through said ports and said openings causing said ball sealers to seat on said openings after passing at least partially through said ports, such that said ball sealers seated in said openings shut off flow of said fluid through said ports and said openings. 2. The method of claim 1, wherein said openings have a generally circular seat adapted to receive said ball sealers. 3. The method of claim 1, wherein said sleeve is hydraulically actuated. 4. The method of claim 1, wherein said sleeve is mounted in a hydraulic cylinder and is actuated by introducing fluid into said hydraulic cylinder. 5. The method of claim 1, wherein said ports in said stimulation valve are provided with pressure release devices allowing said ports to be opened by increasing fluid pressure in said conduit. 6. The method of claim 1, wherein said conduit has a substantially uniform diameter. 7. The method of claim 1, wherein said tubular assembly lacks a ball seat that extends into the conduit and that is adapted to receive a ball for isolating said stimulation valve from fluid pumped into said tubular assembly. 8. The method of claim 1, wherein said stimulation valve lacks a ball seat that extends into the conduit and that is adapted to receive a ball for isolating portions of said tubular assembly downhole of said stimulation valve from fluid pumped into said tubular assembly. 9. The method of claim 1, wherein said stimulation valve is a frac valve and said method comprises pumping said fluid into said formation to fracture said formation. 10. The method of claim 1, wherein said method comprises discontinuing said pumping to allow said ball sealers to move away from said ports. 11. The method of claim 1, wherein said stimulation valve comprises a plurality of stimulation valves and said method comprises: (a) aligning said openings and said ports in a first one of said stimulation valves;(b) pumping fluid through said tubular assembly and into said formation through said ports and said openings in said first stimulation valve,(c) preventing said fluid from flowing through said ports and said openings in said first stimulation valve by introducing the ball sealers into said fluid being pumped through said tubular assembly and allowing said ball sealers to be carried by said fluid into said conduit of said first stimulation valve, said flow of said fluid through said ports and said openings causing said ball sealers to be received in said openings and shut off flow of said fluid through said ports and said openings;(d) aligning said openings and said ports in a second one of said stimulation valves;(e) pumping fluid through said tubular assembly and into said formation through said ports and said openings in said second stimulation valve; and(f) discontinuing said pumping to allow said ball sealers to move away from said openings in said first stimulation valve. 12. The method of claim 1, wherein said tubular assembly is cemented in said well. 13. A method of fracturing a formation in a well in first and second target zones, said method comprising: (a) installing a tubular assembly in said well, said tubular assembly comprising a first frac valve located in said first target zone and a second frac valve located in said second target zone, each of said first and second frac valves defining a conduit extending axially therethrough, each of said first and second frac valves further comprising a mandrel having a plurality of ports and a sleeve having a plurality of openings, wherein aligning said ports and said openings allows flow of fluids between said conduit and the exterior of said first and second frac valves, said ports being misaligned when said tubular assembly is installed;(b) pumping cement through said tubular assembly and through conduits of the first and second frac valves and into the annulus between said tubular assembly and said well;(c) passing a wiper through said tubular assembly and said first and second frac valves;(d) aligning said ports and said openings in said first frac valve;(e) pumping fluid through said ports and said openings in said first frac valve to fracture said first target zone;(f) pumping a plurality of ball sealers through said tubular assembly into said conduit of said first frac valve, said ball sealers being sized to seat on said openings of said first frac valve, thereby shutting off flow of said fluid through said ports and said openings, wherein pumping said ball sealers through the tubular assembly causes said ball sealers pass through said ports and seat on said openings;(g) aligning said ports and said openings in said second frac valve;(h) pumping said fluid through said ports and said openings in said second frac valve to fracture said second target zone. 14. The method of claim 13, wherein said method comprises maintaining sufficient fluid pressure in said first frac valve such that said ball sealers remain seated on said openings in said first frac valve as said ports and said openings in said second frac valve are aligned and said fluid is pumped through said ports and said openings in said second frac valve. 15. The method of claim 13, wherein said method comprises discontinuing said pumping to allow said ball sealers to move away from said openings in said first frac valve. 16. A tubular assembly installed in a well bore, said tubular assembly comprising: (a) tubular members providing a lining for said well bore; and(b) a stimulation valve assembled into said tubular members, said stimulation valve defining a conduit extending axially through said stimulation valve, said stimulation valve further comprising a plurality of ports adapted to allow flow of fluids between said conduit and the exterior of said stimulation valve;(c) wherein said stimulation valve comprises a valve member having a plurality of openings formed therethrough, wherein said ports and said openings are not aligned when said stimulation valve is in a first position, wherein said ports and said openings are aligned when said stimulation valve is in a second position, and wherein said stimulation valve is secured in the second position after being actuated into the second position;(d) wherein said ports and said openings are relatively sized such that a plurality of ball sealers pumped into said conduit seat on said openings after passing at least partially through said ports, for shutting off flow of fluids through said ports and said openings;(e) wherein said tubular assembly lacks a ball seat that extends into said conduit that is adapted to receive a ball for isolating said stimulation valve from fluid pumped into said tubular assembly. 17. The tubular assembly of claim 16, wherein said valve member is a sliding sleeve or a pressure release device. 18. A method of controlling flow into a formation through the use of a stimulation valve in a tubular assembly installed in a well passing through said formation, said method comprising: (a) aligning a plurality of first openings in a sleeve of said stimulation valve with a plurality of ports in a mandrel of said stimulation valve to allow fluid to flow from a conduit of said stimulation valve to an exterior of said stimulation valve;(b) pumping fluid through said tubular assembly and into said formation through said ports and said first openings; and(c) preventing said fluid from flowing through said ports and said first openings by introducing a plurality of ball sealers into said fluid being pumped through said tubular assembly and allowing said ball sealers to be carried by said fluid into said conduit of said stimulation valve, wherein said stimulation valve further comprises a housing position outside of said mandrel and said sleeve, wherein said housing has a plurality of second openings formed therethrough, said flow of said fluid through said ports and said first openings causing said ball sealers to be seated on said second openings in said housing after passing at least partially through the ports and the first openings, so as to shut off flow of said fluid through said ports, first openings, and second openings.
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