Fluid isolating pressure equalization in subterranean well tools
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-034/06
출원번호
US-0204346
(2008-09-04)
등록번호
US-8567506
(2013-10-29)
발명자
/ 주소
Vick, Jr., James D.
Williamson, Jr., Jimmie R.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Smith IP Services, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
A fluid isolating pressure equalization in a subterranean well. A well system includes a well tool including a chamber therein containing an electrical assembly in a dielectric fluid, and a pressure equalization apparatus including a flowpath having opposite ends. One end is connected to the chamber
A fluid isolating pressure equalization in a subterranean well. A well system includes a well tool including a chamber therein containing an electrical assembly in a dielectric fluid, and a pressure equalization apparatus including a flowpath having opposite ends. One end is connected to the chamber, and the other end is connected to a source of another fluid. The flowpath extends alternately upward and downward between the opposite ends. A pressure equalization apparatus for use with a well tool in a subterranean well includes multiple spiral wraps of a tube. A flowpath in the tube extends in opposite directions in respective successive wraps of the tube.
대표청구항▼
1. A well system, comprising: a well tool including a chamber therein containing an electrical assembly in a dielectric first fluid; anda pressure equalization apparatus including a flowpath having first and second opposite ends, the first end being connected to the chamber, the second end being con
1. A well system, comprising: a well tool including a chamber therein containing an electrical assembly in a dielectric first fluid; anda pressure equalization apparatus including a flowpath having first and second opposite ends, the first end being connected to the chamber, the second end being connected to a source of a second fluid, the flowpath extending alternately upward and downward between the first and second ends, a line extending through the flowpath, and pressure transmission through the first and second opposite ends. 2. The system of claim 1, wherein the flowpath comprises an interior passage of a tube. 3. The system of claim 1, wherein the flowpath extends helically about a flow passage extending longitudinally through a tubular string. 4. The system of claim 1, wherein the flowpath extends upwardly and downwardly in respective successive spiral wraps about a flow passage extending longitudinally through a tubular string. 5. The system of claim 1, wherein a pressure in the chamber is equal to a pressure at the second fluid source. 6. The system of claim 1, wherein the second fluid source comprises at least one of an interior longitudinal passage of a tubular string, and an annulus between the tubular string and a wellbore. 7. The system of claim 1, wherein the second fluid enters the second end of the flowpath, but is prevented from flowing to the first end of the flowpath. 8. The system of claim 1, wherein the well tool comprises a safety valve. 9. The system of claim 1, wherein a density of the first fluid is different from a density of the second fluid. 10. The system of claim 1, wherein fluid communication is permitted through the first and second opposite ends. 11. A pressure equalization apparatus for use with a well tool in a subterranean well, the apparatus comprising: multiple spiral wraps of a tube, a flowpath in the tube extending in first and second opposite directions in respective successive wraps of the tube,a line extending through the flowpath,and pressure transmission through first and second opposite ends of the flowpath. 12. The apparatus of claim 11, wherein the first and second directions comprise respective upward and downward directions. 13. The apparatus of claim 11, wherein the flowpath extends helically about a flow passage extending longitudinally through the apparatus. 14. The apparatus of claim 11, wherein a first end of the tube is connected to a chamber having a dielectric first fluid therein, and wherein a second end of the tube is connected to a source of a second fluid. 15. The apparatus of claim 14, wherein a pressure in the chamber is equal to a pressure at the second fluid source. 16. The apparatus of claim 14, wherein the second fluid source comprises at least one of an interior longitudinal passage of a tubular string, and an annulus between the tubular string and a wellbore. 17. The apparatus of claim 14, wherein the second fluid enters the second end of the tube, but is prevented from flowing to the first end of the tube. 18. The apparatus of claim 14, wherein a density of the first fluid is different from a density of the second fluid. 19. The apparatus of claim 14, further comprising an electrical assembly within the chamber. 20. The apparatus of claim 11, wherein fluid communication is permitted through the first and second opposite ends.
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