The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (2) moveable within the outer
The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (2) moveable within the outer housing (1) with an internal bore (3) which in a first closed position is closed with a metal to metal seal system between the outer housing (1) and the internal body (2), which internal body (2) is operated by pressure differential across the internal body (2), where the internal body (2) is designed with slots (4) forming outlets of the internal bore (3) which in an open position of the device is positioned outside of the outer housing (1).
대표청구항▼
1. Device for injection and stimulation of fluids in a process fluid, typically an offshore well bore, typically installed on Christmas trees or wellheads, for petroleum production and gas injection/gas lift system where the device comprises an outer hollow housing (1) and an internal body (2) movea
1. Device for injection and stimulation of fluids in a process fluid, typically an offshore well bore, typically installed on Christmas trees or wellheads, for petroleum production and gas injection/gas lift system where the device comprises an outer hollow housing (1) and an internal body (2) moveable within the outer housing (1), comprising an internal bore (3), which in a closed position is closed with a seal system between the outer housing (1) and the internal body (2), the internal body (2) being operated by pressure differential across the internal body (2), wherein the outer housing (1) comprises a stop surface (20) and the internal body (2) comprises a stop surface (21), a chamber (52) being formed between the outer housing (1), the internal body (2) and the stop surfaces (20, 21), where the internal body (2) furthermore comprises at least one slot (4) forming outlets of the internal bore (3), wherein the at least one slot (4) in an open position of the device is positioned at least partly outside the outer housing (1) leading out to a surrounding fluid, and further wherein the outer housing (1) comprises a through going opening (56) for allowing hydraulic fluid to be added to the device for operation of the device between the open and the closed position. 2. Device according to claim 1, wherein the pressure differential across the internal body (2) is assisted by at least one predetermined pressure balanced elastic element to open and close the device. 3. Device according to claim 1, wherein the at least one slot (4) comprises a plurality of slots (4) which are longitudinal and distributed on the circumference of the inner body (2). 4. Device according to claim 3, wherein the slots in the internal body (2) are beveled and angled from an internal surface to an outer surface of the internal body (2) in order to obtain a predetermined stream line flow. 5. Device according to claim 3, wherein the longitudinal slots in the internal body (2) are parallel to a longitudinal direction of the device or twisted or bend around the longitudinal axis. 6. Device according to claim 1, wherein the seal system comprises a valve seat (10) in the outer housing (1) and a valve element sealing surface (11) on the internal body (2). 7. Device according to claim 6, wherein the valve seat (10) and the valve element sealing surface (11) in an open or partially open position are positioned on opposite sides of the at least one slot (4) seen in a longitudinal direction of the device. 8. Device according to claim 1, wherein the device further comprises elements for overriding and or controlling the open and or closed position of the device. 9. Device according to claim 6, wherein the outer housing (1) comprises a wiper element (50) positioned to abut against and clean the sealing surface (11) during closing of the device. 10. Device according to claim 2, wherein the elastic element (6) comprises a spring element enclosed in the chamber (52), which chamber is filled with a fluid separate from both well and injection fluid. 11. Device according to claim 6, wherein the valve element sealing surface (11) in an open position of the device is positioned outside the outer end of the outer housing (1). 12. Device according to claim 1, wherein the outer housing (1) comprises a first part (1A) and a second part (1B), which first and second parts (1A, 1B) are connected by a threaded connection (1C). 13. Device according to claim 1, wherein the outer housing (1) comprises an inlet (7). 14. Device according to claim 1, wherein the internal body (2) comprises a first part (26) and a second part (27), which first and second parts (26, 27) are connected by a threaded connection (28). 15. Device according to claim 1, wherein the internal body (2) comprises an orifice (8).
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이 특허에 인용된 특허 (23)
Cochran Chudleigh B. (Houston TX), Check valve assembly.
Cummings ; deceased Leslie L. (4018 West Alabama late of Houston TX) Cummings ; executrix by Mildred (4018 West Alabama Houston TX 77027), Chemical injection valve.
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