IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0593101
(2000-06-13)
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발명자
/ 주소 |
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
2 |
초록
A differential-type dry pipe valve for a fire protection sprinkler system has a ratio of effective air sealing area to service water sealing area that is smaller than a ratio of service water pressure to system air pressure at which the fire protection sprinkler system is actuated.
대표청구항
▼
A differential-type dry pipe valve for a fire protection sprinkler system has a ratio of effective air sealing area to service water sealing area that is smaller than a ratio of service water pressure to system air pressure at which the fire protection sprinkler system is actuated. gned with the pro
A differential-type dry pipe valve for a fire protection sprinkler system has a ratio of effective air sealing area to service water sealing area that is smaller than a ratio of service water pressure to system air pressure at which the fire protection sprinkler system is actuated. gned with the production section of the outer tubular and an axially extending nonproduction section that is substantially circumferentially aligned with the nonproduction section of the outer tubular, the production section of the inner tubular having plurality of openings, the nonproduction section of the inner tubular having no openings; and an isolation member disposed within the annulus forming a production pathway between the production sections of the outer and inner tubulars and a slurry passageway between the nonproductions sections of the outer and inner tubulars, the isolation member preventing fluid communication between the production pathway and the slurry passageway, such that when a fluid slurry containing gravel is injected through the slurry passageway, the fluid slurry exits the slurry passageway through the outlet leaving a first portion of the gravel in an annulus between the outer tubular and the wellbore then enters the plurality of opening in the outer tubular leaving a second portion of the gravel in the production pathway. 2. The apparatus as recited in claim 1 further comprising an actuatable device disposed within the outlet to selectively allow and prevent fluid flow therethrough. 3. The apparatus as recited in claim 2 wherein the actuatable device is pressure actuated. 4. The apparatus as recited in claim 2 wherein the actuatable device is a valve. 5. The apparatus as recited in claim 2 wherein the actuatable device is a rupture disk. 6. The apparatus as recited in claim 1 further comprising an exit tube disposed within the outlet. 7. The apparatus as recited in claim 6 wherein at least a portion of the exit tube is disposed within the annulus. 8. The apparatus as recited in claim 6 wherein at least a portion of the exit tube is disposed exteriorly of the outer tubular. 9. The apparatus as recited in claim 1 further comprising an insert member disposed at least partially within the outlet, the insert member comprising an erosion-resistant material. 10. The apparatus as recited in claim 1 wherein the isolation member further comprises a pair of substantially parallel, circumferentially spaced apart, axially extending members that radially extend between the outer and inner tubulars and a pair of substantially parallel, axially spaced apart, circumferentially extending members that radially extend between the outer and inner tubulars that define the production pathway and the slurry passageway and prevent fluid communication therebetween. 11. The apparatus as recited in claim 1 further comprising a sand control screen disposed within the inner tubular. 12. The apparatus as recited in claim 1 wherein the outlet further comprises two outlets. 13. The apparatus as recited in claim 12 wherein the two outlets further comprise an outlet of a first size and an outlet of a second size. 14. The apparatus as recited in claim 1 wherein the axially extending production section in the outer tubular further comprises two axially extending production sections, wherein the axially extending nonproduction section in the outer tubular further comprises two, axially extending nonproduction sections, wherein the axially extending production section in the inner tubular further comprises two axially extending production sections, wherein the axially extending nonproduction section in the inner tubular further comprises two axially extending nonproduction sections, wherein the production pathway formed by the isolation member further comprises two production pathways and wherein the slurry passageway formed by the isolation member further comprises two slurry passageways. 15. The apparatus as recited in claim 14 wherein the outlets of the two nonproduction sections of the outer tubular are at different axial positions along the outer tubular. 16. The apparatus as recited in claim 1 wherein the axially extending production section in the outer tubular further comprises four axially extending production sections, wherei n the axially extending nonproduction section in the outer tubular further comprises four axially extending nonproduction sections, wherein the axially extending production section in the inner tubular further comprises four axially extending production sections, wherein the axially extending nonproduction section in the inner tubular further comprises four axially extending nonproduction sections, wherein the production pathway formed by the isolation member further comprises four production pathways and wherein the slurry passageway formed by the isolation member further comprises four slurry passageways. 17. The apparatus as recited in claim 16 wherein the outlets of the four nonproduction sections of the outer tubular are at different axial positions along the outer tubular. 18. An apparatus for gravel packing an interval of a wellbore, the apparatus comprising: an outer tubular forming a first annulus with the wellbore; and an inner tubular disposed within the outer tubular forming a second annulus therebetween, the second annulus including an axially extending slurry passageway and an axially extending production pathway, a portion of the outer tubular adjacent the slurry passageway having an outlet, a portion of both the outer and inner tubulars adjacent the production pathway having a plurality of openings, the slurry passageway being in fluid isolation from the production pathway such that when a fluid slurry containing gravel is injected through the slurry passageway, the fluid slurry exits the slurry passageway through the outlet leaving a first portion of the gravel in the first annulus then enters the openings in the outer tubular leaving a second portion of the gravel in the production pathway and such that when formation fluids are produced, the formation fluids enter the production pathway through the openings in the outer tubular and exit the production pathway through the openings in the inner tubular passing through the first portion of the gravel in the first annulus and the second portion of the gravel in the production pathway. 19. The apparatus as recited in claim 18 further comprising an actuatable device disposed within the outlet to selectively allow and prevent the flow of the fluid slurry therethrough. 20. The apparatus as recited in claim 19 wherein the actuatable device is pressure actuated. 21. The apparatus as recited in claim 19 wherein the actuatable device is a valve. 22. The apparatus as recited in claim 19 wherein the actuatable device is a rupture disk. 23. The apparatus as recited in claim 18 further comprising an exit tube disposed within the outlet to increase the pressure drop of the fluid slurry traveling therethrough. 24. The apparatus as recited in claim 23 wherein at least a portion of the exit tube is disposed within the first annulus. 25. The apparatus as recited in claim 23 wherein at least a portion of the exit tube is disposed within of the second annulus. 26. The apparatus as recited in claim 18 further comprising an insert member disposed at least partially within the outlet, the insert member comprising an erosion-resistant material. 27. The apparatus as recited in claim 18 further comprising an isolation member disposed within the second annulus defining the slurry passageway and the production pathway and preventing fluid communication therebetween. 28. The apparatus as recited in claim 27 wherein the isolation member further comprises a pair of substantially parallel, circumferentially spaced apart, axially extending members that radially extend between the outer and inner tubulars and a pair of substantially parallel, axially spaced apart, circumferentially extending members that radially extend between the outer and inner tubulars defining the slurry passageway and the production pathway and preventing fluid communication therebetween. 29. The apparatus as recited in claim 18 further comprising a sand control screen disposed within the inner tubular. 30. The appa ratus as recited in claim 18 further comprises a second outlet. 31. The apparatus as recited in claim 30 wherein the two outlets further comprise an outlet of a, first size and an outlet of a second size. 32. The apparatus as recited in claim 18 further comprising a second production pathway and a second slurry passageway. 33. The apparatus as recited in claim 32 wherein the outlets of the two slurry passageways are at different axial positions along the outer tubular. 34. The apparatus as recited in claim 18 further comprising second, third and fourth production pathways and second, third and fourth slurry passageways. 35. The apparatus as recited in claim 34 wherein the outlets of the four slurry passageways are at different axial positions along the outer tubular. 36. An apparatus for gravel packing an interval of a wellbore, the apparatus comprising first and second sections coupled together, each section comprising an outer tubular forming a first annulus with the wellbore and an inner tubular disposed within the outer tubular forming a second annulus therebetween, the second annulus including an axially extending slurry passageway and an axially extending production pathway, a portion of the outer tubular adjacent the slurry passageway having an outlet, a portion of both the outer and inner tubulars adjacent the production pathway having a plurality of openings, the slurry passageway being in fluid isolation from the production pathway, the slurry passageway of the first section being in fluid communication with the slurry passageway of the second section, the production pathway of the first section being in fluid isolation from the production pathway of the second section, such that when a fluid slurry containing gravel is injected through the slurry passageway, the fluid slurry exits the slurry passageway through the outlet leaving a first portion of the gravel in the first annulus then enters the openings in the outer tubular leaving a second portion of the gravel in the production pathway. 37. The apparatus as recited in claim 36 further comprising actuatable devices disposed within the outlets to selectively allow and prevent the flow of the fluid slurry therethrough. 38. The apparatus as recited in claim 36 further comprising exit tubes disposed within the outlets to increase the pressure drop of the fluid slurry traveling therethrough. 39. The apparatus as recited in claim 36 further comprising insert members disposed at least partially within the outlets, the insert members comprising an erosion-resistant material. 40. The apparatus as recited in claim 36 further comprising an isolation member disposed within the second annulus of each section, the isolation member defining the slurry passageway and the production pathway in each section and preventing fluid communication therebetween. 41. The apparatus as recited in claim 40 wherein each isolation member further comprises a pair of substantially parallel, circumferentially spaced apart, axially extending members that radially extend between the outer and inner tubulars and a pair of substantially parallel, axially spaced apart, circumferentially extending members that radially extend between the outer and inner tubulars defining the slurry passageway and the production pathway and preventing fluid communication therebetween. 42. The apparatus as recited in claim 36 further comprising a sand control screen disposed within the inner tubulars. 43. The apparatus as recited in claim 36 wherein the portion of the outer tubular adjacent the slurry passageway of each section has two outlets. 44. The apparatus as recited in claim 43 wherein the two outlets further comprise an outlet of a first size and an outlet of a second size. 45. The apparatus as recited in claim 36 wherein the second annulus of each section further comprises a second production pathway and a second slurry passageway. 46. The apparatus as recited in claim 45 wherein the outlets of the two slurry pass
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