CN101220740A - Electric heating apparatus of hollow sucker rod - Google Patents
Electric heating apparatus of hollow sucker rod Download PDFInfo
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- CN101220740A CN101220740A CNA2008100568993A CN200810056899A CN101220740A CN 101220740 A CN101220740 A CN 101220740A CN A2008100568993 A CNA2008100568993 A CN A2008100568993A CN 200810056899 A CN200810056899 A CN 200810056899A CN 101220740 A CN101220740 A CN 101220740A
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Abstract
The invention discloses a hollow rod electric heater unit, which includes a power supply device, a special type heating cable, a hollow rod and a circuit coupler. The power supply device is connected with a transformer by a power supply cable and transforms a triphase 380V, 50Hz alternating current provided by the transformer into 50Hz-500Hz, 0-2500V single-phase alternating current, at the same time, the live wire of the power supply device is connected with the special type heating cable by the power supply cable; the center of the special type heating cable is a steel core which can provide adequate tensile strength, the outside of the steel core is wrapped with a layer of specially-woven conductor and an insulating layer and a protective sleeve are sequentially arranged outside the conductor; the special type heating cable can be freely withdrawn or lowered into a through hole on the hollow rod, the bottom end of the special type heating cable is connected with the hollow rod by the circuit coupler.
Description
Technical field
The present invention is about a kind of heater that is used for the oil field, more specifically, and about a kind of viscous crude or high electric heater unit that coagulates oily pumpingh well pit shaft of being used for.
Background technology
Most methods that adopt the exploitation of hot water (or deep fat) circulation companion heat in the oil pumping process of oil field even the liquid that heated enters, are returned ground again between middle sleeve pipe 10 and outer tube (not shown) between middle sleeve pipe 10, oil pipe 9 now.This heating means exist the thermal efficiency low, the exploitation of incompatible special viscous crude, super viscous crude.
Another kind of method commonly used is to use deep-well oil electromagnetic heater, and this deep-well oil electromagnetic heater is made of surface power supply power supply, downhole electromagnetic heater, oil pipe, sleeve pipe.Wherein the structure of heater is oil pipe, insulating layer, copper coil, insulation materials from inside to outside.Operating principle is to form magnetic field to copper coil power supply back, forms eddy current and produce heat on oil pipe, in order to heating in crude oil.But this method complex structure comparatively difficulty of insulation materials, copper cash and insulating layer is set, and fault is many, inconvenient between oil pipe and sleeve pipe.
For this reason, a kind of AC Electric Heater sucker rod companion thermic devices was once disclosed in No. the 92216143.7th, the Chinese patent, this companion's thermic devices includes electric supply installation, heating cable, circuit coupling and hollow rod, make cable, circuit coupling and hollow rod form a loop in use, and the viscous crude or the height of heating periphery coagulates oil after energising, is convenient to adopt.But the companion's thermic devices in this patent needs sucker rod substitute to realize being connected of heating cable and hollow rod, has baroque problem, and the heating cable of Cai Yonging can not satisfy the requirement of existing oilfield exploitation simultaneously.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of electric heating apparatus of hollow sucker rod, and this electric heater unit passes through the architecture advances to the heating cable of inside, makes it meet the requirement of existing mining environment.By architecture advances, make use convenient and simple simultaneously to the circuit coupling.
Electric heating apparatus of hollow sucker rod among the present invention includes electric supply installation, extraordinary heating cable, hollow rod and circuit coupling, wherein:
Described electric supply installation is connected with transformer by electricity cable, the three-phase 380V that described transformer is provided, the single-phase alternating current that the 50Hz alternating current becomes 50Hz-500Hz, 0-2500V, the live wire of described electric supply installation is connected with described extraordinary heating cable by electricity cable;
In the through hole that places described hollow rod that described extraordinary heating cable can freely be lowered to and propose, the lowermost end of described extraordinary heating cable is connected with described hollow rod by the circuit coupling.
Described electric cupler comprises base, the plug of being made by the low-carbon alloy steel and is filled in filled media between described base and the plug, wherein base adopts with the bottom of described hollow rod and is threaded, described plug and described extraordinary heating cable welding, the filled media between described base and described plug is a conductive paste.
The center of described extraordinary heating cable is for being used to provide the steel core of enough tensile strength, and the outside of described steel core is surrounded by the conductor of the special braiding of one deck, is provided with insulating layer and protective sleeve successively in the outside of described conductor; The conductor of described special braiding becomes one by 27 0.52 copper cash are stranded, and stranded around steel core by 6 strands of copper cash with spline structure again, the pitch ratio is not more than 15/30.
Described steel core is a wire rope.
Described extraordinary heating cable outside is a steel pipe, and the center is a copper conductor, is insulating layer between described copper conductor and described steel pipe.
Described electric supply installation adopts vertical structure, is provided with movement above upright shell inside, and the bottom is provided with transformer, is provided with the isolation part between described movement and transformer.
Described movement includes rectification circuit, filter circuit, inverter circuit, control section, reaches the display part.
Described transformer is the intermediate frequency output transformer, and this intermediate frequency output transformer includes the loop configuration that iron-base amorphous alloy material is made, and is wound on the multiply transposition copper conductor on the described loop configuration.
Described insulating layer and protective sleeve are merged into one.
Electric heating apparatus of hollow sucker rod advantage among the present invention is simple in structure, and installation is easy, cost is lower, easy to adjust, easily is automated.It is the most effective, most economical, safest Heating device for oil well of viscous crude (or the high oil that coagulates) exploitation.
Description of drawings
Fig. 1 is the structural representation of electric heater unit among the present invention;
Fig. 2 is the structural representation of special cable embodiment one among the present invention;
Fig. 3 is the structural representation of special cable embodiment two among the present invention;
Fig. 4 is the structural representation of electric supply installation among the present invention;
Fig. 5 is the circuit theory diagrams of electric supply installation among the present invention;
Fig. 6 is the structural representation of the circuit coupling among the present invention;
Fig. 7 is the schematic perspective view of extraordinary heating cable among the present invention;
Fig. 8 is the electrical block diagram of movement among the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment among the present invention is described in further detail.
As shown in Figure 1, the electric heater unit of hollow core sucker rod of the present invention includes electric supply installation 2, special cable 3, circuit connector 5 and hollow rod 4.Wherein:
As shown in Figure 5, electric supply installation 2 includes rectification circuit 23, filter circuit 24, inverter circuit 25, control section 26, display part 27 and transformer 21, its operating principle is: the uncontrollable rectification circuit of three-phase of forming capacitor filtering by Power Diode Pumped and electrochemical capacitor, alternating current is converted to direct current, the switch of the inverter circuit of forming by power semiconductor device by the programme-control in the control section 26 again, power frequency (50Hz) is transformed to intermediate frequency (50Hz-500Hz), output to extraordinary heating cable 3 by intermediate-frequency transformer 21 then, collection skin and kindred effect by electric current heat oil reservoir.It is sinusoidal wave that the control program of inverter circuit adopts the pulse duration modulation method of space vector of voltage (SVPWM) to generate, compare with traditional intermediate frequency power supply have DC voltage utilization rate height, harmonic components is few, control is simple, Digital Realization such as makes things convenient at advantage.Because the circuit of electric supply installation is a prior art, be easy to realize under the enlightenment of above-mentioned principle as those skilled in the art, therefore no longer describe in detail.
As shown in Figure 1, extraordinary heating cable 3 is connected with the live wire of electric supply installation 2 by cable introducer 8, electricity cable 13, and extraordinary heating cable 3 is introduced in the through hole of hollow rod 4 under the deep-well simultaneously, and hollow rod 4 passes hollow circulation pump 6 simultaneously.Extraordinary heating cable 3 constitutes loops with hollow rod 4, forms the kelvin effect calandria, and oil well is heated, and makes oil well obtain the heat that adds of 80-120W/m, and 60 ℃-80 ℃ of oily Wen Keda keep the ordinary production of spy, super viscous crude (or high coagulate oily) oil well.The surface has electric current to flow because the ferromagnetic material decision of hollow rod 4 has only within it, and external surface does not have voltage and current, have only drain voltage and leakage current, and drain voltage has only tens millivolts, and leakage current also has only tens milliamperes, is foolproof to production.
As shown in Figure 2, extraordinary heating cable 3 is for improving the tensile strength of cable, and its center is for adopting the steel core 17 of wire rope, and overall tensile strength can be brought up to 1.5-3t.The external packets of wire rope 17 is covered with the conductor (cable core) 18 of special braiding, and the diameter of wire rope 17 is generally 25-35mm
2, the rated current of cable when depending on the oil well heating.As shown in Figure 7, the conductor 18 of special braiding becomes one by 27 0.52 copper cash are stranded, and stranded around steel core 17 by 6 strands of copper cash with spline structure again, the pitch ratio is not more than 15/30, can avoid some copper cash like this because unbalance stress plays bulging phenomenon.The outside of conductor 18 is coated with the insulating layer 19 made by polyethersulfone ketone resin (PPESK) material and protective sleeve 20 successively, and (insulating layer 19 and protective sleeve 20 can merge in aggregates; also can adopt other high-temperature insulation material), wherein the thickness of insulating layer 19 and protective sleeve 20 depends on the required voltage of oil well heating.And the high temperature resistant degree of this insulating layer 19 and protective sleeve 20 is 250 ℃.
As shown in Figure 3, the special cable 3 among the present invention also can adopt steel armored cable, and the outside of this steel armored cable is a steel pipe 30, and the center is a copper conductor 31, is insulating layer 32 between copper conductor 31 and steel pipe 30.Adopt this steel armored cable can improve tensile strength and application life.Insulating layer 32 in this steel armored cable is made by polyethersulfone ketone resin (PPESK) material.
As shown in Figure 6, circuit coupling 5 is made up of three parts: base 50, plug 51 and filled media 52.Wherein base 50 adopts the low-carbon alloy steel materials processings to form, with hollow rod 4 bottoms by being threaded.Plug 51 is a copper rod, with extraordinary heating cable 3 welding.The filled media 52 that base 50 and plug are 51 is a conductive paste.Since between circuit coupling 5 and hollow rod 4 bottoms by being threaded, thereby can realize the function that extraordinary heating cable 3 freely is lowered to and proposes in hollow rod 4.
As shown in Figure 1, the use of electric heater unit is as follows among the present invention:
The three-phase 380V that at first utilizes electric supply installation 2 to provide by electricity cable 12 by power supply 1, the 50Hz AC power converts the single-phase alternating current of 50Hz-500Hz to, offer extraordinary heating cable 3 by electricity cable 13 again and send into the down-hole, wherein extraordinary heating cable 3 places in the through hole of hollow rod 4, pass hollow circulation pump 6 with hollow rod 4, promptly utilize circuit coupling 5 and hollow rod 4 to constitute the loop in the bottom of oil well, form the kelvin effect calandria, oil well is heated, make oil well obtain the heat that adds of 80-120W/m, 60 ℃-80 ℃ of oil Wen Keda, and keep the spy, the ordinary production of super viscous crude (or the high oil that coagulates) oil well.
In sum, the electric heater unit among the present invention has following advantage:
1, the improvement of extraordinary heating cable can adapt to the requirement of existing exploitation, simultaneously can be high temperature resistant 250 ℃.
2, the iron core of output transformer 26 is an annular, and material is an amorphous state, and it is low to have cost, and the efficient height moves very reliable advantage.
Claims (10)
1. an electric heating apparatus of hollow sucker rod includes electric supply installation (2), extraordinary heating cable (3), hollow rod (4) and circuit coupling (5), it is characterized in that:
Described electric supply installation (2) is connected with transformer by electricity cable, the three-phase 380V that described transformer is provided, the single-phase alternating current that the 50Hz alternating current becomes 50Hz-500Hz, 0-2500V, the live wire of described electric supply installation (2) is connected with described extraordinary heating cable (3) by electricity cable;
In the through hole that places described hollow rod (4) that described extraordinary heating cable (3) can freely be lowered to and propose, the lowermost end of described extraordinary heating cable (3) is connected with described hollow rod (4) by circuit coupling (5).
2. according to the electric heating apparatus of hollow sucker rod described in the claim 1, it is characterized in that: described electric cupler (5) comprises base, the plug of being made by the low-carbon alloy steel and is filled in filled media between described base and the plug, wherein base adopts with the bottom of described hollow rod (4) and is threaded, described plug and described extraordinary heating cable (3) welding, the filled media between described base and described plug is a conductive paste.
3. according to the electric heating apparatus of hollow sucker rod described in the claim 1, it is characterized in that: the steel core (17) of the center of described extraordinary heating cable (3) for being used to provide enough tensile strength, the outside of described steel core (17) is surrounded by the conductor (18) of the special braiding of one deck, is provided with insulating layer (19) and protective sleeve (20) successively in the outside of described conductor (18); The conductor of described special braiding (18) becomes one by 27 0.52 copper cash are stranded, and stranded around steel core (17) by 6 strands of copper cash with spline structure again, the pitch ratio is not more than 15/30.
4. according to the electric heating apparatus of hollow sucker rod described in the claim 3, it is characterized in that: described steel core (17) is a wire rope.
5. according to the electric heating apparatus of hollow sucker rod described in the claim 1, it is characterized in that: described extraordinary heating cable (3) is outside to be steel pipe (30), and the center is copper conductor (31), is insulating layer (32) between described copper conductor and described steel pipe.
6. according to the electric heating apparatus of hollow sucker rod described in claim 3 or 5, it is characterized in that: the material of described insulating layer (19,32) and protective sleeve (20) is that heatproof is 250 ℃ a polyethersulfone ketone resin material.
7. according to the electric heating apparatus of hollow sucker rod described in the claim 1, it is characterized in that: described electric supply installation (2) adopts vertical structure, top in the inside of upright shell (22) is provided with movement (28), the bottom is provided with transformer (21), is provided with isolation part (29) between described movement and transformer.
8. according to the electric heating apparatus of hollow sucker rod described in the claim 7, it is characterized in that: described movement (20) includes rectification circuit (23), filter circuit (24), inverter circuit (25), control section (26), reaches display part (27).
9. according to the electric heating apparatus of hollow sucker rod described in claim 7 or 8, it is characterized in that: described transformer (21) is the intermediate frequency output transformer, this intermediate frequency output transformer includes the loop configuration that iron-base amorphous alloy material is made, and is wound on the multiply transposition copper conductor on the described loop configuration.
10. according to the electric heating apparatus of hollow sucker rod described in the claim 3, it is characterized in that: described insulating layer (19) becomes one with protective sleeve (20) merging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100568993A CN101220740A (en) | 2008-01-25 | 2008-01-25 | Electric heating apparatus of hollow sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100568993A CN101220740A (en) | 2008-01-25 | 2008-01-25 | Electric heating apparatus of hollow sucker rod |
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| CN101220740A true CN101220740A (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100568993A Pending CN101220740A (en) | 2008-01-25 | 2008-01-25 | Electric heating apparatus of hollow sucker rod |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438341A (en) * | 2011-11-11 | 2012-05-02 | 山东斯巴特电力驱动技术有限公司 | Medium-high frequency heating cable |
| CN103835689A (en) * | 2014-03-17 | 2014-06-04 | 大连爱德摩设备制造有限公司 | Oil layer electrical heating oil extracting device and using method thereof |
| CN104635809A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气集团公司 | Equipment for remotely controlling frequency modulation cyclic heating of heating sucker rods of cluster wells |
| CN106150392A (en) * | 2016-08-29 | 2016-11-23 | 王国良 | Can conduct electricity transmission torque sucker rod |
| CN106837193A (en) * | 2017-03-03 | 2017-06-13 | 河北华通线缆集团股份有限公司 | Frequency Induction Heating umbilical and preparation method thereof |
| CN108505971A (en) * | 2018-04-20 | 2018-09-07 | 吉林大学 | A kind of downhole fluid electric heater |
| CN111364962A (en) * | 2020-04-01 | 2020-07-03 | 辽宁华孚石油高科技股份有限公司 | Electric heating method and device for enhancing oil production of SAGD well |
| CN112081555A (en) * | 2020-09-22 | 2020-12-15 | 山东天汇石油技术有限公司 | Viscosity reducing device for thick oil rodless submersible pump well |
| CN112081554A (en) * | 2020-09-22 | 2020-12-15 | 山东天汇石油技术有限公司 | Using method of viscosity reduction device of thick oil rodless submersible pump well |
| CN113374447A (en) * | 2021-07-09 | 2021-09-10 | 沈阳工业大学 | Step power electrical heating oil production device |
-
2008
- 2008-01-25 CN CNA2008100568993A patent/CN101220740A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438341A (en) * | 2011-11-11 | 2012-05-02 | 山东斯巴特电力驱动技术有限公司 | Medium-high frequency heating cable |
| CN104635809A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气集团公司 | Equipment for remotely controlling frequency modulation cyclic heating of heating sucker rods of cluster wells |
| CN104635809B (en) * | 2013-11-13 | 2017-03-15 | 中国石油天然气集团公司 | Cluster well heating sucker rod frequency modulation circulating-heating remote control |
| CN103835689A (en) * | 2014-03-17 | 2014-06-04 | 大连爱德摩设备制造有限公司 | Oil layer electrical heating oil extracting device and using method thereof |
| CN103835689B (en) * | 2014-03-17 | 2016-08-17 | 大连爱德摩设备制造有限公司 | Oil reservoir electrical heating oil extracting appts and using method thereof |
| CN106150392A (en) * | 2016-08-29 | 2016-11-23 | 王国良 | Can conduct electricity transmission torque sucker rod |
| CN106837193A (en) * | 2017-03-03 | 2017-06-13 | 河北华通线缆集团股份有限公司 | Frequency Induction Heating umbilical and preparation method thereof |
| CN106837193B (en) * | 2017-03-03 | 2019-04-02 | 河北华通线缆集团股份有限公司 | Mid-frequency induction heating umbilical and preparation method thereof |
| CN108505971A (en) * | 2018-04-20 | 2018-09-07 | 吉林大学 | A kind of downhole fluid electric heater |
| CN108505971B (en) * | 2018-04-20 | 2023-09-22 | 吉林大学 | Downhole fluid electric heater |
| CN111364962A (en) * | 2020-04-01 | 2020-07-03 | 辽宁华孚石油高科技股份有限公司 | Electric heating method and device for enhancing oil production of SAGD well |
| CN112081555A (en) * | 2020-09-22 | 2020-12-15 | 山东天汇石油技术有限公司 | Viscosity reducing device for thick oil rodless submersible pump well |
| CN112081554A (en) * | 2020-09-22 | 2020-12-15 | 山东天汇石油技术有限公司 | Using method of viscosity reduction device of thick oil rodless submersible pump well |
| CN113374447A (en) * | 2021-07-09 | 2021-09-10 | 沈阳工业大学 | Step power electrical heating oil production device |
| CN113374447B (en) * | 2021-07-09 | 2022-12-02 | 沈阳工业大学 | Step power electrical heating oil production device |
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Open date: 20080716 |