CN101107421A - Selective electromagnetic production tool - Google Patents
Selective electromagnetic production tool Download PDFInfo
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- CN101107421A CN101107421A CNA2006800028000A CN200680002800A CN101107421A CN 101107421 A CN101107421 A CN 101107421A CN A2006800028000 A CNA2006800028000 A CN A2006800028000A CN 200680002800 A CN200680002800 A CN 200680002800A CN 101107421 A CN101107421 A CN 101107421A
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Abstract
The invention provides a method to reduce the heavy oil viscosity by heating the underground area by the resistance. The method applies at least two electrodes modified to the three-phase flow and a producing pipe of the electric insulator.
Description
Invention field
Relate generally to of the present invention is used for improving one's methods and installing of back production subsurface deposit medium-high viscosity oil.On the one hand, the present invention relates to the underground shaping thing of resistance heated to reduce the method for described oil viscosity.On the other hand, the present invention relates to comprise the heating and the process units of flexible production pipe.On the other hand, the present invention relates to by inserting the method that the topping up well bore is finished producing well through the improved production pipe of buoyancy aid.
Prior art is discussed
Heavy oil is that viscosity is very high, often comprises for example natural formation oil of the impurity of sulphur.Conventional lightweight oil viscosity is about 0.5 centipoise (cP)-Yue 100cP, and the viscosity of heavy oil is 100cP-1,000, and more than the 000cP.The heavy-oil reservoir reserve accounts for 15% of world's residue oil sources total amount according to estimates.Singly in the U.S., the heavy oil resource is about 300.5 hundred million barrels according to estimates, and the heavy oil output accounts for the major part of domestic oily output.For example, singly in California, the heavy oil output accounts for this state more than 60% of production of oil.Find along with new conventional light oil storage becomes more difficult, improving one's methods of heavy oil extraction becomes more important.Regrettably heavy oil extraction is expensive usually, and conventional method is for only the have an appointment rate of extraction of 10-30% of the heavy oil of existing storage.Therefore, develop have more efficient, effectively the heavy oil extraction approach presses for.
A kind of mode that can back production heavy oil is to pass through electromagnetic stimulation.This comprises by reduce the viscosity of heavy oil with electrical heating.There are some kinds of diverse ways about electromagnetic stimulation, comprise for example eddy-current heating, heating using microwave and resistance heated.Eddy-current heating utilizes the heating element under the hole, directly is heat with current transitions.Heating using microwave uses very high frequency can heat oil reservoirs.Resistance heated is used the electrode that is grounding to adjacent well bore or is grounding to the surface.Salt solution by symbiosis in the oil reservoirs in this method comes from the electrode conductive electric current.Resistance heated is actual to be heating heavy oil underground shaping thing on every side, thereby described oil is heated and reduce its viscosity.
Electromagnetic stimulation is the ideal style that reduces furol viscosity in theory, because electricity can extensively obtain, and the ground installation that it needs is minimum.But the result does not but reach theory state.There have been many different designs for electromagnetic stimulation of heavy oil reserves, but do not had a kind of complete extensive approval that is enough to obtain.This mainly is because prior art is not developed deployment system under a kind of economic excellent hole that is used for electromagnetic stimulation.
In the electromagnetic stimulation method, resistance heated is the reliable approach of the reduction furol viscosity of tool prospect seemingly.Its a kind of reason is because electric current only flows through the conductive brine of oil well, so resistance heated is without any need for the injection of type.But,, still need but still do not have the resistive heating system of accepting extensively as in the electromagnetic stimulation of other type.Thereby, still need effectively to increase the electromagnetic heating system of heavy oil storing output.
The oil well and/or the natural gas well flatly drill through along some directions from a well head because of a variety of causes often.But a this problem finishing horizontal well is to be difficult to and will to produce the end that pipe extends well.Therefore, also need a kind of more effective method of finishing horizontal well.
Purpose of the present invention and summary
Corresponding to these and other problem, the object of the invention provides and a kind ofly has more efficient, effectively extracts the method for heavy oil.
Another object of the present invention provides a kind of device, and it provides resistance heated subterranean oil storing to make it possible to extract the effective way of heavy oil.
Another object of the present invention provides a kind of more effective way of finishing horizontal well and/or gas well.
Should be noted that, be not that all purposes listed above must realize by this paper the present invention for required protection, and other purpose of the present invention and advantage see it is open-and-shut from following description of the present invention and claims.
According to a kind of embodiment of the present invention, provide a kind of method of resistance heated subterranean zone.This method comprises makes electricity by the zone between two or more electrodes that separate.These electrodes are coupled to the production pipe that is arranged in this zone.
According to another embodiment of the present invention, provide a kind of method of resistance heated subterranean zone.This method comprises makes electricity by the zone between two or more electrodes.These electrodes are coupled to the production pipe of common length and separate each other along the length of this pipe.
According to another embodiment of the present invention, provide a kind of configuration to be connected to the oil reservoirs heater of producing pipe.This device comprises electrical insulator and a plurality of conductive electrode of prolongation.This device is the unassembled structure that is not coupled of this device and described pipe and this device and produce between the package assembly that pipe is coupled and can change wherein therein.When this device was in package assembly, electrode separated each other along the length of this isolator.When this device was in package assembly, this isolator made electrode and described pipe electric insulation.
According to another embodiment of the present invention, provide a kind of system of resistance heated subterranean zone.This system comprises the production pipe of first length; The production pipe of second length that separates with the production pipe of first length; First electrode of a series of electrical connections that separate along the length of the production pipe of first length; Second electrode of a series of electrical connections that separate with length along the production pipe of second length.
According to another embodiment of the present invention, a kind of method of finishing well is provided, comprising: (a) low-density is coupled on the production pipe of certain-length; (b) the production pipe insertion with this length comprises in the hole of the density fluid bigger than described low-density.
The accompanying drawing summary
With reference to the accompanying drawings, describe the preferred embodiments of the invention in detail, wherein:
Fig. 1 is the heavy oil heater of expression according to one embodiment of this invention, particularly expression are coupled to the certain-length production pipe that extends in the horizontal segment of well bore a cross-sectional side view;
Fig. 2 is the local enlarged side view of the part of Fig. 1 heater, shows the spaced-apart electrodes and the isolator of heater especially;
Fig. 3 is the amplification stereogram of the part of Fig. 1 heater, shows wherein power line, electrode and isolator coupling especially and is arranged on the pipe mode on every side of producing;
Fig. 4 is the sectional view along the heater of Fig. 2 line 4-4, further shows wherein power line, electrode and isolator coupling and is arranged on the pipe mode on every side of producing;
Fig. 5 is the sectional view along Fig. 4 line 5-5, further shows electrode, isolator and power line;
Fig. 6 is the vertical view according to another heavy oil heating system of one embodiment of this invention, shows the cross section that is arranged on 3 heaters in the 3 horizontal well bores that radially extend especially;
Fig. 7 is expression is arranged on the heavy oil heating system in the two parallel well bores according to one embodiment of this invention a schematic diagram;
Fig. 8 is the schematic diagram of finishing oil well and/or gas well according to one embodiment of this invention, shows the production pipe of being furnished with buoyancy aid especially and puts in the horizontal well that is filled with liquid.
Detailed description of the preferred embodiments
At first see Fig. 1, shown well bore 10 extends in the underground shaping thing 12, the oil-containing part 14 of the most contiguous underground shaping thing 12.Well bore 10 comprises section of sealing 16 and open segment 18.The section of sealing 16 of well bore 10 by housing 20 envelopes, and extends in vertical substantially mode.The open segment 18 of well bore 10 is not sealed.In one embodiment of the present invention, the oil-containing part 14 of the open segment 18 the most contiguous underground shaping things 12 of well bore 10 is extended in the mode of basic horizontal.In another embodiment of the present invention, the oil-containing part 14 of the open segment 18 the most contiguous underground shaping things 12 of well bore 10 is extended in vertical substantially mode.In another embodiment of the present invention, the oil-containing part 14 of the open segment 18 the most contiguous underground shaping things 12 of well bore 10 is extended in the mode of basic inclination.Producing pipe 22 is arranged in the well bore 10.Preferably, producing pipe 22 is conventional flexible metal hose, for example coil pipe.Replacedly, produce pipe 22 substantially by non-conductive material, for example plastics or fibrous glass constitute.In another replaceable scheme, producing pipe 22 is conventional flexible metal hoses, comprises electrical insulator between each section of this pipe.The not improvement part 24 of producing pipe 22 puts in the section of sealing 16 of well bore 10, and the improvement part 26 of production pipe 22 puts in the open segment 18 of well bore 10.The improvement part 26 of producing pipe 22 is porose, enters with the oil in the open segment 18 that allows to be derived from the oil-containing part 14 of underground shaping thing 12 and to be distributed in well bore 10 and produces pipe 22.
Produce the improvement part 26 of pipe 22 and be furnished with heating and process units 28.Heating and process units 28 generally comprise electrical insulator 30 and a plurality of electrode 32.Isolator 30 is coupled to the improvement part 26 of producing pipe 22, and extends along the length of improvement part 26.Electrode 32 generally is an annular, is coupled to isolator 30 and extends around it.Electrode 32 makes preferable alloy, most preferably stainless steel by conductive material.Electrode 32 separates each other along the length of the improvement part 26 of producing pipe 22.As described in detail below, can make electrode 32 charged, thereby the oil-containing part 14 of underground shaping thing 12 is carried out resistance heated.Isolator 30 can be operated, so that produce pipe 22 and electrode 32 electric insulations.Preferably, heater 28 comprises at least 2 electrodes 32, more preferably at least 4 electrodes 32, most preferably 6-20 electrode 32.Preferably, electrode 32 is along the length of producing pipe 22 about 500 feet of the about 25-that separates each other, and more preferably from about 50-is about 200 feet.Preferably, the length of each electrode 32 is about 10 feet of about 1-, and more preferably from about 2-is about 5 feet.In a preferred embodiment of the invention, isolator 30 extends continuously along major part (all preferred) length of the improvement part 26 of producing pipe 22.Preferably, isolator 30 extends at least about 300 feet continuously along the length of producing pipe 22, more preferably extends about 400 feet-Yue 2000 feet along the length of producing pipe 22.
Present 2-5 with the aid of pictures, in a preferred embodiment of the invention, heating and process units 28 comprise isolator 30, electrode 32, power line 34, dead ring 36, retainer ring 38 and C type folder 40.Isolator 30 comprises a plurality of, preferred 4 independently body section 42a, b, c, d.Each bar among preferred 4 power line 34a, b, c, the d is arranged between each individual section 42a, b, c, the d.C type folder 40 is preferably made by the electrically insulating material of flexibility, for example plastics.Each C type folder 40a, b, c, d are fixed together each to body section 42a, b, c, d, and will be equipped with bar power line 34a, b, c, d and be fixed in the isolator 30.By this way, isolator 30 can be operated, and makes power line 34a, b, c, d be electrically insulated from each other, and manages 22 with production, with electrode 32 insulation.Dead ring 36 can be operated, and makes electrode 32 and production pipe 22 and power line 34 insulate.Retainer ring 38 can be operated, and makes dead ring 36 firmly be coupled to isolator 30.In addition, retainer ring 38 helps each individual section 42a, b, c, d are fixed together.Each electrode 32 extends around each dead ring 36, and with its coupling.As being the clearest expression among Fig. 3-5, each electrode 32 defines a plurality of electrode holes 44, and each dead ring 36 defines a plurality of annular distances 46, and isolator 30 defines a plurality of insulator bore 48, produces pipe 22 and defines a plurality of pores 50.As being the clearest expression in the Figure 4 and 5, preferably, electrode hole 44, annular distance 46 and insulator bore 48 basic alignings with formation runner 52, thus allow fluid by wherein, flow into to produce and manage in 22.
Refer again to Figure 4 and 5, heating and process units 28 also comprise arrangements of electric connection, are used for each electrode 32 is electrically connected to wherein of power line 34.In one embodiment of the present invention, this arrangements of electric connection is provided by wire jumper screw rod 54, and this wire jumper screw rod 54 extends through electrode 32, dead ring 36, C type folder 40, contacts with power line 34.With reference to Fig. 4, in another embodiment of the present invention, arrangements of electric connection is provided by switch 56.Switch 56 comprises first conducting element 58 that is connected to a power line 34 and second conducting element 60 that is connected to electrode 32.Control line 62 can provide and be used for optionally making electrode 32 charged by opening and closing switch 56.Thereby in this embodiment, each electrode 32 that separates along the length of producing pipe 22 can open and close individually.In another embodiment of the present invention, provide thermocouple 64 along the length of producing pipe 22.Thermocouple 64 is fibre-optic cable preferably, and it operationally measures the temperature of well bore 10 and underground shaping thing 12.
Refer again to Fig. 3-5, as above mention, producing pipe 22 can be that the conventional pipe of producing is transformed into the production pipe 22 that comprises heating and process units 28 making after, perhaps produces to manage 22 and can replacedly be made by non-conducting material, and is transformed into and comprises and heating and process units 28.In another embodiment of the present invention, to produce pipe 22 and can comprise the conventional pipe of producing, it comprises isolator between every section of pipe, and is transformed into and comprises heating and process units 28.Be transformed into and comprise heating and process units 28 in order to produce pipe 22, heating and process units 28 must be transformed into package assembly (wherein install 28 with produce manage 22 and be coupled) by unassembled structure (wherein install 28 with produce coupling of pipe 22).Be coupled to production pipe 22 in order to heat with process units 28, power line 34a, b, c, d are arranged between body section 42a, b, c, the d; Body section 42a, b, c, d are arranged on and produce around the pipe 22; C type folder 40a, b, c, d are used for body section 42a, b, c, d are fixed on the production pipe 22; Dead ring 36 is arranged on the isolator 30; Retainer ring 38 is arranged on around the dead ring 36; Electrode 32 is arranged on the dead ring 36.
Refer again to Fig. 1-5,, make 2 or more a plurality of electrode 32 charged or ground connection in order to descend the oil-containing part 14 of shaping thing 12 heatedly.With electrode 32 charged feasible electricity by the electrode 32 of underground shaping thing 12 from charged electrode to ground connection.The resistance that underground shaping thing 12 is provided with underground shaping thing 12 and in the fluid resistance heating that comprises.Preferably, the oil-containing part 12 of underground shaping thing 14 comprises high-viscosity oil.The resistance heated of underground shaping thing 14 is made the high-viscosity oil no longer thickness that becomes, thereby can easily flow to the open segment 18 of well bore 10.In case in well bore 10, the oil of this heating can easily be discharged from well bore 10 through producing pipe 22.
Refer again to Fig. 1-5, In one embodiment of the present invention, power line 34a, b, c have three-phase electricity, and power line 34d ground connection.In this embodiment, switch 56 can be operated and make electrode 32 be connected with one of them of power line 34a, b, c, d.Thereby all electrodes 32 on the device 28 can be mutually charged in expectation.In another embodiment of the present invention, thermocouple 60 is used for measuring the Temperature Distribution of underground shaping thing 12.Utilize this Temperature Distribution, electrode 32 can be by charged or ground connection, and the Temperature Distribution with the oil-containing part 14 of optimally descending shaping thing 12 makes heavy oil flow to and produces in the pipe 22.
Turn to Fig. 6 now, in another embodiment of the present invention, heating and process units 100 have first and produce leg 102, the second production leg 104 and the 3rd production leg 106.First produces leg 102 comprises around producing first isolator 108 and first group of electrode 110 that pipe extends; Second produces leg 104 comprises around producing second isolator 112 and second group of electrode 114 that pipe extends; The 3rd produces leg 106 comprises around producing the 3rd isolator 116 and the 3rd group of electrode 118 that pipe extends.Each produce leg can with above-mentioned Fig. 1-5 in heating and process units 28 essentially identical modes assemble.First produces leg 102 is arranged in first well bore 120; Second produces leg 104 is arranged in second well bore 122; The 3rd produces leg 106 is arranged in the 3rd well bore 124.First produces leg 102, the second production leg 104 and the 3rd production leg 106 assembles and moves in the mode among above-mentioned Fig. 2-5.First, second and the 3rd group of electrode can so that first, second and the 3rd group of electrode each fill with three-phase electricity in the mode of isopic zone electricity not.First termination electrode 126, second termination electrode 128 and three-end electrode 130 preferably are connected to ground power line, so that each termination electrode all is neutralized.When charged, these electrodes make electricity pass wherein to be provided with the subterranean zone of well bore 120,122 and 124.Electric current is crossed conductive brine, heats the heavy oil in this zone, reduces its viscosity thus and it can be flow in the production pipe of device 100.
Turn to Fig. 7 now, another embodiment of the present invention comprises the production pipe that is arranged on two segment length in the well bore 202.Well bore 202 comprises single vertical section 204, first horizontal segment 206 and second horizontal segment 208.Well bore 202 extends through the subterranean zone 210 of oil-containing.The vertical section 204 of well bore 202 is sealed by housing 212.First horizontal segment 206 of well bore 202 and 208 openings of second horizontal segment.First heating and process units 214 are arranged in first horizontal segment 206 of well bore 202.First heating and process units 214 comprise that first produces pipe 216, first electrical insulator 218 and first group of electrode 220.Second heating and process units 222 are arranged in second horizontal segment 208 of well bore 202.Second heating and process units 222 comprise that second produces pipe 224, second electrical insulator 226 and second group of electrode 228.In heating and process units 214 and 222, isolator 218 and 226, two arrays of electrodes 220 and 228, to produce pipe 216 and 224 all with holes, is used for fluid and flows to each and produce and manage.First heater 214 and second heater 222 can be to assemble and to move with above-mentioned basic identical mode with reference to Fig. 1-6.
Turn to Fig. 8, another embodiment of the present invention comprise oil and/the finishing of gas well 300.In this embodiment, heating and process units 302 comprise production pipe 304, electrical insulator 306 and a plurality of electrode 308.Isolator 306 by proportion less than about 1, preferably form less than about 0.75 low close material.The low-density of isolator 306 makes device 302 can float on the liquid 310 in the well bore 312.Float on the liquid 310 because install 302, it is easier will install 302 ends that move on to well bore 312.
Above-mentioned preferred form of the present invention only is used for explanation, should not be used for restrictedly explaining scope of the present invention.Those skilled in the art are not breaking away under the spirit of the present invention, can easily significantly improve above-mentioned exemplary.
The inventor illustrates their purpose at this: do not have substantive break away from but below the present invention during any device beyond the described literal scope of claim when relating to, according to doctrine of equivalents, determine and estimate the rationally fair scope of the present invention.
Claims (62)
1. the method for a resistance heated subterranean zone, described method comprises:
Make electricity by the zone between two or more spaced-apart electrodes, described electrode is coupled to the production pipe that is arranged in the described zone.
2. the method for claim 1, described electrode is arranged in the open well bore.
3. method as claimed in claim 2, described well bore basic horizontal orientation.
4. the method for claim 1, described electrode are dispersed in two or more open well bores.
5. method as claimed in claim 4, described well bore is substantially parallel to each other.
6. method as claimed in claim 5, described electricity transmits between well bore.
7. the method for claim 1, described subterranean zone comprises high-viscosity oil, and described oil is by the electric resistance heated by described zone, makes the described oil no longer thickness that becomes thus.
8. the method for claim 1, described electrode are arranged in the open well bore of two or more basic horizontal and basic coplane, and described electricity transmits between described well bore.
9. the method for claim 1, described electrode be coupling in produce pipe outside around.
10. method as claimed in claim 9, wherein each extension around the production pipe fully of described electrode.
11. the method for claim 1, described electrode by being coupled to the electrical insulator of producing pipe with described pipe electric insulation.
12. method as claimed in claim 11, described isolator are extended around producing pipe fully.
13. method as claimed in claim 12, described isolator extends continuously along 300 feet that produce length of tube at least.
14. method as claimed in claim 11, described electrode be coupling in isolator around.
15. method as claimed in claim 14, described isolator, described electrode and described production pipe are all with holes, to allow fluid to flow through wherein and to flow in the described pipe along most of length of described pipe.
16. method as claimed in claim 11, described electrode wherein each is electrically coupled to along producing one of them of a plurality of electric conductors that pipe extends.
17. method as claimed in claim 16, described conductor dbus are crossed isolator and are produced the pipe electric insulation.
18. method as claimed in claim 17, described isolator make wherein at least one electric insulation of wherein each and described conductor of described electrode.
19. the method for a resistance heated subterranean zone, described method comprises:
Make electricity by the zone between first group of two or more electrode, described first group of electrode is coupled to first to be produced on the common length of pipe, and separates each other along first length of producing pipe.
20. method as claimed in claim 19 also comprises:
Make electricity by the zone between described first group of electrode and the second group of electrode, described second group of electrode is coupled to second to be produced on the common length of pipe, and separate each other along second length of producing pipe, described second produces pipe and first produces pipe and separates, and substantially parallel extension with it.
21. method as claimed in claim 20, described first and second produce pipes be arranged on two separate, in the basic horizontal, substantially parallel open well bore.
22. method as claimed in claim 20, described first produces pipe has first electrical insulator that is coupled on it, and described second produces pipe has second electrical insulator that is coupled on it.
23. method as claimed in claim 22, the described first and second production pipes, described electrode and described isolator are all with holes, produce in pipe to allow fluid to flow through wherein and to flow to each.
24. method as claimed in claim 22, described first and second isolators wherein each is embedded with at least 4 power lines, described power line wherein 3 be configured to take three-phase electricity, the 4th of described power line is configured to ground connection.
25. method as claimed in claim 24, described electrode comprise that power line passes through metal ring wherein, described electrode wherein each makes the charged or ground connection of electrode thus by wherein at least one being connected of contact device and described power line.
26. method as claimed in claim 25 also comprises:
A plurality of thermocouples that separate that use is coupled along first length of producing pipe are to set up the Temperature Distribution of described subterranean zone.
27. method as claimed in claim 26 also comprises:
Optionally make the charged or ground connection of electrode, to optimize Temperature Distribution.
28. method as claimed in claim 19, described electrode separates each other at least 25 feet.
29. method as claimed in claim 28, described electrode separate about 50 feet-Yue 200 feet.
30. method as claimed in claim 28, described first group of electrode comprises at least 4 independently electrodes.
31. a configuration is connected to the oil reservoirs heater of producing pipe, described device comprises:
The electrical insulator of lengthening; With
The electrode of a plurality of conductions,
Described device is the unassembled structure that is not coupled of this device and described pipe and this device and produce between the package assembly that pipe is coupled and can change wherein therein;
When this device was in package assembly, described electrode separated each other along the length of described isolator; With
When this device was in package assembly, described isolator made electrode and described pipe electric insulation.
32. oil reservoirs heater as claimed in claim 31, described production pipe and described isolator are with holes, flow in the production pipe of package assembly to allow fluid.
33. oil reservoirs heater as claimed in claim 31, when this device was in package assembly, described electrode separated at least 25 feet.
34. oil reservoirs heater as claimed in claim 31, when this device was in package assembly, described electrode separated about 50 feet-Yue 200 feet.
35. oil reservoirs heater as claimed in claim 31 also comprises:
When this device is in package assembly, be arranged in the isolator and along many that produce that pipe extends power lines independently to small part.
36. oil reservoirs heater as claimed in claim 35 also comprises:
When this device is in package assembly, relevant with each electrode and operationally with the wherein electric connector of a phase electric coupling of described electrode and power line.
37. oil reservoirs heater as claimed in claim 36, described electric connector comprises the wire jumper screw rod.
38. oil reservoirs heater as claimed in claim 36, described electric connector comprises switch.
39. oil reservoirs heater as claimed in claim 38 also comprises:
When this device is in package assembly, be arranged in the isolator and be connected to the wherein control line of each of described switch,
Described control line can be controlled each independently switch, so that being electrically connected and can optionally opening and closing between power line and each electrode.
40. oil reservoirs heater as claimed in claim 35, when this device is in package assembly, described electrode wherein each is included in the conducting ring around isolator and the power line.
41. oil reservoirs heater as claimed in claim 40, described electrode are about about 10 feet of 1-.
42. oil reservoirs heater as claimed in claim 31, described device comprise one or more thermocouples that are connected on the described isolator.
43. oil reservoirs heater as claimed in claim 42, described thermocouple comprise the fibre-optic cable that is arranged in the isolator.
44. the system of a resistance heated subterranean zone, described system comprises:
The production pipe of first length;
The production pipe of second length that separates with the production pipe of first length;
First electrode of a series of electrical connections that separate along the length of the production pipe of first length; With
Second electrode of a series of electrical connections that separate along the length of the production pipe of second length.
45. system as claimed in claim 44, the production pipe of described first length and second length essentially horizontally directed to small part.
46. system as claimed in claim 44 also comprises:
Be coupled to first electrical insulator of the production pipe of first length; Second isolator with the production pipe that is coupled to second length.
47. system as claimed in claim 46, described first and second isolators make the production pipe of first electrode and first length respectively, the production pipe lagging of second electrode and second length.
48. system as claimed in claim 46, the proportion of described first and second isolators is less than about 1.
49. system as claimed in claim 48, the proportion of described first and second isolators is less than about 0.75.
50. system as claimed in claim 44 also comprises:
First group two or more are power line independently, and it is coupled to the production pipe of first length and along its extension; With
Second group two or more are power line independently, and it is coupled to the production pipe of second length and along its extension.
51. system as claimed in claim 50, described first and second electrodes comprise that respectively first and second groups of power lines pass metal ring wherein respectively.
52. system as claimed in claim 50 also comprises:
Relevant with each electrode also operationally with each electrode wherein electric connector that is connected with power line.
53. system as claimed in claim 52, described electric connector comprises the wire jumper screw rod.
54. system as claimed in claim 52, described electric connector comprises switch.
55. a method of finishing well, described method comprises:
(a) will hang down the production pipe that dense body is coupled to certain-length; And
(b) the production pipe of described length is inserted comprise in the well bore that has than the fluid of the bigger density of described low dense body.
56. method as claimed in claim 55, described low dense body is formed by electrically insulating material.
57. method as claimed in claim 55, described well bore is open.
58. method as claimed in claim 55, the proportion of described low dense body is less than about 1.
59. method as claimed in claim 55, the proportion of described low dense body is less than about 0.75.
60. method as claimed in claim 55 also comprises:
(c) length along described production pipe is provided with a plurality of conductors, and described low dense body makes produces pipe and conductor insulation.
61. method as claimed in claim 60 also comprises:
(d) around producing pipe a plurality of conducting rings are set, described low dense body makes produces pipe and described ring insulation.
62. method as claimed in claim 61, about 25 feet-Yue 500 feet of described central spacers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006800028000A CN101107421A (en) | 2006-01-26 | 2006-01-26 | Selective electromagnetic production tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006800028000A CN101107421A (en) | 2006-01-26 | 2006-01-26 | Selective electromagnetic production tool |
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| Publication Number | Publication Date |
|---|---|
| CN101107421A true CN101107421A (en) | 2008-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800028000A Pending CN101107421A (en) | 2006-01-26 | 2006-01-26 | Selective electromagnetic production tool |
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| CN (1) | CN101107421A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306654A (en) * | 2013-06-07 | 2013-09-18 | 吉林大学 | Underground on-site electromagnetic compound heating method of oil shale |
| CN104912532A (en) * | 2015-05-12 | 2015-09-16 | 中国科学院力学研究所 | Device and method for exploiting seafloor natural gas hydrates through continuously injecting hot seawater |
| CN105041276A (en) * | 2015-07-23 | 2015-11-11 | 中国海洋石油总公司 | High frequency viscosity-reducing electrode device based on high-low frequency crude oil viscosity-reducing device and making method |
-
2006
- 2006-01-26 CN CNA2006800028000A patent/CN101107421A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306654A (en) * | 2013-06-07 | 2013-09-18 | 吉林大学 | Underground on-site electromagnetic compound heating method of oil shale |
| CN104912532A (en) * | 2015-05-12 | 2015-09-16 | 中国科学院力学研究所 | Device and method for exploiting seafloor natural gas hydrates through continuously injecting hot seawater |
| CN104912532B (en) * | 2015-05-12 | 2018-11-20 | 中国科学院力学研究所 | It is continuously injected into the device and method of hot sea water exploitation sea bed gas hydrate |
| CN105041276A (en) * | 2015-07-23 | 2015-11-11 | 中国海洋石油总公司 | High frequency viscosity-reducing electrode device based on high-low frequency crude oil viscosity-reducing device and making method |
| CN105041276B (en) * | 2015-07-23 | 2019-04-30 | 中海油能源发展股份有限公司 | High frequency viscosity reduction electrode assembly and production method based on low-and high-frequency reducing crude oil viscosity device |
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