(WO201979885) System and method for heating a conduit 机翻标题: 暂无翻译,请尝试点击翻译按钮。

源语言标题
(WO201979885) System and method for heating a conduit
公开号/公开日
WO2019/079885 / 2019-05-02
申请号/申请日
WOCA2018/051328 / 2018-10-19
发明人
SAYED, Amr MohamedMOORE, Robert GordonMEHTA, Sudarshan;
申请人
;
主分类号
IPC分类号
E21B-036/04 E21B-043/24 F16L-053/35 H05B-003/40 H05B-003/60
摘要
(WO201979885) There is described a system comprising an outer conduit; an inner conduit positioned within the outer conduit such that an annular space is defined between the outer conduit and the inner conduit; and a resistive heating material occupying at least a portion of an annular volume within the annular space and having a positive temperature coefficient of resistance.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
地址
代理人
(WO201979885) KINGWELL, Brian et al. ([CA])
代理机构
;
优先权号
2017US-62575837
主权利要求
(WO201979885) Claims 1. A system comprising: an outer conduit;   an inner conduit positioned within the outer conduit such that an annular space is defined between the outer conduit and the inner conduit; and   a resistive heating material occupying at least a portion of an annular volume within the annular space and having a positive temperature coefficient of resistance. 2. The system of claim 1 , wherein the resistive heating material extends from the inner conduit to the outer conduit. 3. The system of claim 1 or 2, further comprising an electrical power source configured to apply a voltage between at least two of the outer conduit, the inner conduit, and the resistive heating material so as to increase a temperature of the resistive heating material. 4. The system of any one of claims 1-3, further comprising an annular dielectric element provided within the annular space. 5. The system of claim 4, wherein the dielectric element comprises a ceramic. 6. The system of claim 5, wherein the ceramic comprises one or more of aluminium oxide, boron nitride, and beryllium oxide. 7. The system of claim 5, wherein the dielectric element comprises an air gap. 8. The system of any one of claims 4-6, wherein the dielectric element comprises a centralizer configured to space the inner conduit concentrically relative to the outer conduit. 9. The system of any one of claims 1-8, further comprising a downhole casing within which is positioned the outer conduit. 10. The system of any one of claims 1-9, wherein the resistive heating material is a solid. 11. The system of any one of claims 1-9, wherein the resistive heating material is a liquid having a viscosity of greater than 1 ,000 Pa s. 12. The system of any one of claims 1-1 1 , wherein the resistive heating material comprises a conductive polymer composite. 13. The system of claim 12, wherein the conductive polymer composite comprises a dielectric polymer and a conductive filler. 14. The system of claim 13, wherein the conductive filler comprises one or more of carbon black, carbon nanotubes, carbon black nanoparticles, and carbon fibers. 15. The system of claim 13 or 14, wherein the conductive filler comprises one or more of a metallic powder, metal flakes, metal-coated fibers, and metal nanowires. 16. The system of any one of claims 13-15, wherein the conductive filler comprises one or more of silver, copper, aluminum, and nickel. 17. The system of any one of claims 12-16, wherein the conductive polymer composite comprises one or more of: a stabilizing agent; a curing agent; and an oxidizer. 18. The system of any one of claims 1-17, wherein the outer conduit comprises insulation for reducing heat loss. 19. The system of claim 3, wherein the electrical power source is configured to output a DC signal or an AC signal with a frequency up to 200 kHz. 20. The system of any one of claims 1-19, wherein the outer conduit and the inner conduit are positioned within a wellbore. 21. The system of any one of claims 1-20, wherein the resistive heating material prevents fluid flow from a first end of the inner conduit and the outer conduit to a second end of the inner conduit and the outer conduit. 22. The system of any one of claims 1-21 , wherein the resistive heating material is self-regulating. 23. The system of any one of claims 1-22, wherein the inner conduit and the outer conduit comprise threaded ends, and wherein the resistive heating material extends a length of the inner and outer conduits, from one threaded end of the inner and outer conduits to the other threaded end of the inner and outer conduits. 24. The system of claim 8, further comprising first and second annular dielectric elements provided at respective ends of the annular space, and wherein the resistive heating material extends along the inner and outer conduits, from the first annular dielectric element to the second annular dielectric element. 25. The system of any one of claims 1-24, wherein a thickness of the annular space is from: about 1.2 cm to about 10.2 cm; less than 1.2 cm; or up to about 50.8 cm. 26. A method of heating a conduit, comprising:   positioning an inner conduit within an outer conduit such that an annular space is defined between the inner conduit and the outer conduit;   providing a resistive heating material within the annular space such that the resistive heating material occupies at least a portion of an annular volume within the annular space, wherein the resistive heating material has a positive temperature coefficient of resistance; and applying a voltage between at least two of the outer conduit, the inner conduit, and the resistive heating material so as to increase a temperature of the resistive heating material. 27. The method of claims 26, wherein the resistive heating material extends from the inner conduit to the outer conduit. 28. The method of claim 26 or 27, wherein providing the resistive heating material comprises injecting the resistive heating material within the annular space and allowing the injected resistive heating material to cure. 29. The method of any one of claims 26-28, further comprising, prior to positioning the inner conduit within the outer conduit, molding the resistive heating material to one of the inner conduit and the outer conduit. 30. The method of any one of claims 26-29, further comprising flowing a fluid within the inner conduit. 31. The method of claim 30, wherein the fluid comprises one or more of oil, brine, natural gas, and water. 32. The method of claim 30 or 31 , wherein the fluid comprises water, and wherein the temperature of the resistive heating material is increased so as to convert the injected water to steam. 33. The method of any one of claims 26-32, further comprising controlling the applied voltage so as to control a temperature of a fluid within the inner conduit. 34. The method of any one of claims 26-33, further comprising providing an annular dielectric element within the annular space. 35. The method of claim 34, wherein the dielectric element comprises a ceramic 36. The method of claim 35, wherein the ceramic comprises one or more of aluminium oxide, boron nitride, and beryllium oxide. 37. The method of claim 34, wherein the dielectric centralizer comprises an air gap. 38. The method of any one of claims 34-36, wherein the dielectric element comprises a centralizer configured to space the inner conduit concentrically relative to the outer conduit. 39. The method of any one of claims 26-38, wherein the resistive heating element is a solid. 40. The method of any one of claims 26-38, wherein the resistive heating element is a liquid having a viscosity of greater than 1 ,000 Pa s. 41. The method of any one of claims 26-40, wherein the resistive heating element comprises a conductive polymer composite. 42. The method of claim 41 , wherein the conductive polymer composite comprises a dielectric polymer and a conductive filler. 43. The method of claim 42, wherein the conductive filler comprises one or more of carbon black, carbon nanotubes, carbon black nanoparticles, and carbon fibers. 44. The method of claim 42 or 43, wherein the conductive filler comprises one or more of a metallic powder, metal flakes, metal-coated fibers, and metal nanowires. 45. The method of any one of claims 42-44, wherein the conductive filler comprises one or more of silver, copper, aluminum, and nickel. 46. The method of any one of claims 41-45, wherein the conductive polymer composite comprises one or more of: a stabilizing agent; a curing agent; and an oxidizer. 47. The method of any one of claims 26-46, wherein the outer pipe comprises insulation for reducing heat loss. 48. The method of any one of claims 26-47, wherein applying the voltage comprises applying a DC signal or an AC signal with a frequency up to 200 kHz. 49. The method of any one of claims 26-48, wherein the resistive heating material is self- regulating. 50. The method of any one of claims 26-49, wherein the inner conduit and the outer conduit comprise threaded ends, and wherein the resistive heating material extends a length of the inner and outer conduits, from one threaded end of the inner and outer conduits to the other threaded end of the inner and outer conduits. 51. The method of claim 34, further comprising first and second annular dielectric elements provided at respective ends of the annular space, and wherein the resistive heating material extends along the inner and outer conduits, from the first annular dielectric element to the second annular dielectric element. 52. The method of any one of claims 26-51 , wherein a thickness of the annular space is from: about 1.2 cm to about 10.2 cm; less than 1.2 cm; or up to about 50.8 cm. 53. A system comprising:   an outer conduit;   an inner conduit positioned within the outer conduit such that an annular space is defined between the outer conduit and the inner conduit; and   a resistive heating material provided within the annular space and comprising a conductive polymer composite. 54. A system comprising:   an outer conduit;   an inner conduit positioned within the outer conduit such that an annular space is defined between the outer conduit and the inner conduit; and   a resistive heating material provided within the annular space and extending from the inner conduit to the outer conduit.
法律状态
PENDING
专利类型码
A1
国别省市代码
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