CN203362117U - Well head electromagnetic heating device of oil well - Google Patents
Well head electromagnetic heating device of oil well Download PDFInfo
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- CN203362117U CN203362117U CN 201320390778 CN201320390778U CN203362117U CN 203362117 U CN203362117 U CN 203362117U CN 201320390778 CN201320390778 CN 201320390778 CN 201320390778 U CN201320390778 U CN 201320390778U CN 203362117 U CN203362117 U CN 203362117U
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Abstract
The utility model relates to the technical field of oil exploitation, in particular to a well head electromagnetic heating device of an oil well. The well head electromagnetic heating device includes an inner pipe, magnetic cores, coils and a controller; the inner pipe is arranged in an oil pumping pipe in a nested mode; the multiple sets of magnetic cores are arranged between the inner pipe and a sucker rod, the multiple sets of magnetic cores are fixed on the inner wall of the inner pipe and distributed in a multi-layered mode, and each set of magnetic cores comprises a plurality of magnetic core bodies which use the center axis of the inner pipe as the symmetry axis and are symmetrically distributed in the radial direction; the inner pipe and the magnetic cores are made of high-permeability materials; the coils are wound on the magnetic cores, and each set of magnetic cores and the coils wound on the magnetic cores form an electromagnetic pole pair; the controller is in electrical connection with the coils for controlling the number of the electromagnetic pole pairs powered on. Compared with heating wires wound on the exterior of the oil pumping pipe, the heating efficiency of the well head electromagnetic heating device of the oil well is higher.
Description
Technical field
The utility model relates to the petroleum collection technical field, in particular to a kind of well mouth of oil well electromagnetic heater.
Background technology
In the actual recovery process of the oil well of the special oil and gas pools such as viscous crude, high solidifying oil and condensate gas, Chang Fashengyin oil is thick, wax deposition, overload and cause stuck, the disconnected phenomenon that can not normally produce such as de-of sucker rod, badly influences output and recovery ratio.In existing various solutions, petroleum oil is heated to the mobility that not only can improve crude oil, play the effect of volume increase, and can solve lifting, back pressure problem simultaneously, therefore petroleum oil being heated is a kind of effective measures that address the above problem.
Wherein, a kind of feasible mode of heating is to utilize electromagnetic induction technology on petroleum oil pipe to be heated.Yet in the existing correlation technique of utilizing electromagnetic induction principle to be heated, be mainly by heating wire winding on oil pipe, carry out the crude oil in the indirect heating oil pipe by the heating oil pipe, although this electromagnetic induction heating technology can produce current vortex, but the shielding action due to oil pipe, make eddy current substantially decay to zero apart from outside wall surface 1mm with interior place at oil pipe, although expended a large amount of electric energy, heating effect is not obvious.Therefore,, there is the technological deficiency that the efficiency of heating surface is not high in the electromagnetic induction heater in correlation technique.
The utility model content
The purpose of this utility model is to provide the well mouth of oil well electromagnetic heater, to solve the above problems.
A kind of well mouth of oil well electromagnetic heater is provided in embodiment of the present utility model, has comprised inner tube, magnetic core, coil and controller;
Described inner tube is nested in the inside of oil pick-up tube;
Be provided with many group magnetic cores between described inner tube and sucker rod, described many group magnetic cores are fixed on the inwall of described inner tube and Multi-layers distributing, and each group magnetic core comprises that a plurality of central axiss of take described inner tube are the magnetic core that the axis of symmetry radial symmetric distributes;
Described inner tube and described magnetic core are high permeability material and make;
Described coil winding is on described magnetic core, and each group magnetic core and coil wound on it form an electromagnetic pole pair;
Described controller and described coil are electrically connected, for controlling the electromagnetic pole logarithm of energising.
Wherein, also comprise flow meter, torque sensor and power sensor;
Described flow meter is placed in well head, for gathering the well head flow information;
Described torque sensor is placed in motor interior, for gathering motor moment information;
Described power sensor, be arranged on the polished rod top, for gathering the gravity information of sucker rod.
Wherein, described inner tube and described magnetic core are the electrical sheet material.
Wherein, described magnetic core is connected with described inner tube one.
Wherein, the distance of described magnetic core and sucker rod is less than 1 millimeter.
Wherein, also comprise cable, described cable is connected between described coil and described controller, and described controller is controlled energising and the outage of coil on every group of magnetic core by described cable.
Wherein, the axial spacing between two groups of adjacent magnetic cores is greater than 10 centimetres.
The well mouth of oil well electromagnetic heater of the utility model above-described embodiment, in oil pick-up tube inside, electromagnetic heater is set, directly crude oil is directly heated, after coil electricity, can make magnetic core produce constant magnetic field, sucker rod is in the process of pumping, the stator generation relative motion that can form with magnetic core and inner tube, sucker rod is conducting medium often, between conducting medium and magnetic field, there is relative motion will produce the speed electric field, and inner tube, magnetic core is high permeability material, therefore can form eddy current between inner tube and coil and sucker rod, eddy current flows in stator, thereby finally be converted into directly heating in crude oil of heat energy, compare at the outside heating wire that is wound around of oil pick-up tube, the efficiency of heating surface is higher.
The accompanying drawing explanation
The longitudinal sectional drawing of the embodiment that Fig. 1 is well mouth of oil well electromagnetic heater of the present utility model;
The transverse cross-sectional view of the embodiment that Fig. 2 is well mouth of oil well electromagnetic heater of the present utility model.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
The utility model embodiment provides the well mouth of oil well electromagnetic heater, shown in Fig. 1 and Fig. 2, comprises inner tube 2, magnetic core 3, coil (not shown) and controller 4.
Described inner tube 2 is nested in the inside of oil pick-up tube 1; Be provided with many group magnetic cores 3 between described inner tube 2 and sucker rod 6, described many group magnetic cores 3 are fixed on the inwall of described inner tube 2 and Multi-layers distributing, and each group magnetic core comprises that a plurality of central axiss of take described inner tube 2 are the magnetic core that the axis of symmetry radial symmetric distributes.
Described coil winding is on described magnetic core, and each group magnetic core and coil wound on it form an electromagnetic pole pair.
Described controller 4 is electrically connected with described coil, for controlling the electromagnetic pole logarithm of energising.
Preferably, in the utility model embodiment, the energising of coil windings number of pole-pairs is adjustable, according to external temperature environment and pumping operating mode follow-up adjustment magnetic field intensity, and then regulates heating.When Changes in weather or underground working change, the well mouth of oil well crude oil temperature is carried out to lifting in various degree for same a bite oil well.And, to the adjustment of hot-wire coil winding number of pole-pairs, also need to have the reference data of quantification, and therefore be set to control the data acquisition equipment that hot-wire coil group number provides reference data, mainly comprise flow meter, torque sensor and power sensor.
Described flow meter is placed in well head, for gathering the well head flow information; Described torque sensor is placed in motor interior, for gathering motor moment information; Described power sensor, be arranged on the polished rod top, for gathering the gravity information of sucker rod.
Described controller, for receiving the gravity information of described well head flow information, motor moment information and sucker rod, according to the gravity information of described well head flow information, motor moment information and sucker rod, calculate the electromagnetic pole logarithm of energising.
Particularly, described controller carries out analytical calculation to described well head flow information, draws the current liquid measure that needs heating of well head, and then calculates the first electromagnetic pole logarithm of energising; And described motor moment information is carried out to the data processing, analyze the current equilibrium condition of oil pumper, calculate the second electromagnetic pole logarithm of energising; Gravity information to described sucker rod is carried out the data processing, calculates the 3rd electromagnetic pole logarithm of energising.
Afterwards, according to formula
The 4th electromagnetic pole logarithm=K1* first electromagnetic pole logarithm+K2* second electromagnetic pole logarithm+K3* the 3rd electromagnetic pole logarithm
Described the first electromagnetic pole logarithm, described the second electromagnetic pole logarithm and described the 3rd electromagnetic pole logarithm are weighted to calculating, draw the 4th electromagnetic pole logarithm, and the electromagnetic pole logarithm of controlling energising is the 4th electromagnetic pole logarithm, described K1, K2 and K3 are weight coefficient.
Preferably, as a kind of embodiment, K1=0.7, K2=0.1, K3=0.2.Those skilled in the art, can according to actual data information, suitably adjust weight coefficient according to technical conceive of the present utility model, and the utility model does not enumerate, but all should belong to protection domain of the present utility model.
The groundwork step of controller is:
Step 1: controller 4 receives numeral or the analog signal that flow meter sends, and through data, processes, and the current heating liquid measure that needs of analytical calculation well mouth of oil well, calculate the coil windings number of pole-pairs (the first electromagnetic pole logarithm) that needs energising.
Step 2: controller 4 receives numeral or the analog signal that torque sensor sends, and through data, processes, and analyzes the current balance of oil pumper, calculates the balance that needs the compensation oil pumper, calculates hot-wire coil winding number of pole-pairs (the second electromagnetic pole logarithm).
Step 3: numeral or analog signal that controller 4 reception sensors send, through data, process, analyze the oil well current working, calculate hot-wire coil winding number of pole-pairs (the 3rd electromagnetic pole logarithm).
Step 4: get the result of calculation of first three step, weighted calculation hot-wire coil winding (the 4th electromagnetic pole logarithm).The purpose of weighted calculation is under can realizing the heating crude oil prerequisite, takes into account the even running of motor and because the variation of underground working causes the variation of oil pumper lifting simultaneously.
Wherein, controller 4 can be wired connection with being connected of coil, by cable 8, carries out signal communicating.Described cable 8 is connected between described coil and described controller 4, and described controller 4 is controlled energising and the outage of coil on every group of magnetic core by described cable 8.
The heater that the utility model embodiment provides, the potential energy that the main source of its heat energy is sucker rod, comparatively power saving.
For example, hyposmosis, 24 hours liquid outlet quantity of heavy crude well are about 2～15 sides, approximately tens degrees centigrade of well head oil temperatures.On this temperature basis, the heating crude oil of electromagnetic heater to the well head of flowing through, realize approximately 5～10 degrees centigrade of temperature rises.With 5 degrees centigrade of calculating of 2 side's crude oil risings in 24 hours, need about 220W heat energy.
The heat energy obtained by the rod string gravity acting, potential energy turns heat energy and is:
P=F*v
Wherein P is heat energy; F is that rod string is partly conducted oneself with dignity, and all the other weight of rod string are balanced the piece balance; V is sucker rod cutting magnetic field speed, 2.5 jig frequencies approximately per minute, 1.2～2.5 meters of strokes.
During magnetic core winding 500 circle energising 0.5A, produce 191W heat, produce 153Kg brake force simultaneously.
To sum up, but the about 150 kilograms of sucker rod weights of every group of electromagnetism winding balance produce the hot heating in crude oil of 190W simultaneously.
Wherein, described inner tube 2 and described magnetic core 3 are high permeability material and make.
Preferably, as a kind of embodiment, described inner tube 2 and described magnetic core 3 are the electrical sheet material.Those skilled in the art can adopt other high permeability materials to make inner tube 2 and magnetic core 3 according to actual needs.
Preferably, described magnetic core 3 is connected with described inner tube 2 one.
It should be noted that, in order effectively to form field circuit, described magnetic core 3 is less than 1 millimeter with the distance of sucker rod 6, and the air gap shown in Fig. 1 and Fig. 25 is less than 1mm.The more little more favourable magnetic circuit of void dimension forms, and magnetic conduction is not non-conductive for the crude oil existed in air gap 5, is unfavorable for that field circuit forms, thereby is unfavorable for that current vortex forms.
Simultaneously, it should be noted that and should make the mover sucker rod also want magnetic conduction in the material of coil winding position.Perhaps, add other conducting magnetic component, make coil, air gap, stator electrical sheet inner sleeve forms magnetic loop, and mover sucker rod cutting magnetic field effectively produces eddy current.
In addition, in order to guarantee the proper flow of crude oil, the cavity 7 between magnetic core should be enough large, and the axial spacing between two groups of adjacent magnetic cores is greater than 10 centimetres.
The main feature of the heater that the utility model embodiment provides is, hot-wire coil is set up magnetic field, and well rod is done relative motion under deadweight in magnetic field, induces eddy current, heating in crude oil, crude oil flowing through coil group simultaneously, cooling coil.Wherein sucker rod is equivalent to mover, and inner tube and magnetic core and coil are stator.When this electromagnetic induction heater work, the mover sucker rod is with certain speed relative stator electrical sheet movement of inner pipe, and mover will be moved and cut in the stationary magnetic field that the electrical sheet magnetic core of winding around is set up also with identical speed.Owing to there being the relative motion meeting to produce the speed electric field between conducting medium and magnetic field, therefore generation speed electric field between the electrical sheet magnetic core of stator electrical sheet inner tube and winding around and air gap, and the generation eddy current, eddy current flows and finally can be converted into heat energy in stator, thereby makes former heating of oil.
Wherein, each is extremely settled the rising of winding coil one-level one-level, and crude oil can heating several times in uphill process.
Simultaneously, also can heat during the crude oil cooling coil of flowing through coil.Shown in Figure 2, the electrical sheet inner tube, coil, air gap and mover sucker rod form the electromagnetism flow circuits jointly.Therefore in oil pipe, mobile crude oil also can be heated, and the viscosity step-down has guaranteed the proper flow of crude oil.
It should be noted that, in this device, the only cutting magnetic field generation effect in descending process of mover sucker rod, uply do not act on, and coil switch on when sucker rod is descending, generation magnetic field; Coil is at the up no power of sucker rod.
Wherein, coil electricity is in order to impel the formation with the interactional magnetic field of stator, and the coil windings energising is little electric current, but not with electrical heating large electric current used, the power of consumption is less also.Coil can adopt thin enamel-covered wire, is around on the high permeability material core body.
Wherein, sucker rod is descending is that the mover sucker rod is descending voluntarily under rod string part Gravitative Loads power, does not need exterior power.When the mover sucker rod is descending, the eddy current that the energising winding forms, to one of the sucker rod generation reverse upward force, reduces the momentum of the sucker rod movement of falling object, can control the sucker rod downstream rate, the impact of buffering to motor.
Simultaneously, in order effectively to utilize energy, coil windings directly is exposed in crude oil in oil pipe, crude oil can be carried out coil windings cooling, has both removed cooling system, the heating while at current vortex to crude oil, also can make crude oil obtain reheat.
In addition, heating technique of the prior art, also need converter plant, and field practice shows, converter plant has increased cost, and the fault rate of oil pumper also obviously increases, thereby apply and be restricted; And implement and also need to expend large electric energy.And heater of the present utility model, do not need that converter plant is set and electrical current less, cost is lower and energy-conservation.
To sum up, a kind of well mouth of oil well electromagnetic heater that the utility model provides, utilize sucker rod partly to conduct oneself with dignity descending voluntarily, do not need the external world that kinetic energy is provided, and realizes energy-conservation; Electricity magnetisation process is only having in the descending process of sucker rod, and electromagnetism produces reverse, and the power made progress, realize the level and smooth of horse head operation curve; The up no power of sucker rod, without extra additional force, the motor load of oil pumper does not change with original comparing; The crude oil flowing through coil, coil is effectively realized the heating to crude oil, and has deducted the coil cooling system, has simplified structure; The hot-wire coil number of pole-pairs is adjustable, improves motor operating condition, is conducive to improve the balance of oil pumper; Have intelligently, according to the variation of pumping operating mode, electrical current can be adjusted in real time, guarantees effectively heating.Therefore, this device have insulation, anti-condensation, separate wax, energy-conservation, cost is low, life cycle is long, easy for installation, easily control, be convenient to the advantages such as maintenance, protection of the environment, between different oil wells, device does not have specificity, maintenance and replacing are all very convenient.Particularly in low permeability oil field marginal block development process, for the single well production collection is defeated and unmanned, opened up the new way of efficient a, low consumption, safety and environmental protection.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. the well mouth of oil well electromagnetic heater, is characterized in that, comprises inner tube, magnetic core, coil and controller;
Described inner tube is nested in the inside of oil pick-up tube;
Be provided with many group magnetic cores between described inner tube and sucker rod, described many group magnetic cores are fixed on the inwall of described inner tube and Multi-layers distributing, and each group magnetic core comprises that a plurality of central axiss of take described inner tube are the magnetic core that the axis of symmetry radial symmetric distributes;
Described inner tube and described magnetic core are high permeability material and make;
Described coil winding is on described magnetic core, and each group magnetic core and coil wound on it form an electromagnetic pole pair;
Described controller and described coil are electrically connected, for controlling the electromagnetic pole logarithm of energising.
2. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, also comprises flow meter, torque sensor and power sensor;
Described flow meter is placed in well head, for gathering the well head flow information;
Described torque sensor is placed in motor interior, for gathering motor moment information;
Described power sensor, be arranged on the polished rod top, for gathering the gravity information of sucker rod.
3. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, described inner tube and described magnetic core are the electrical sheet material.
4. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, described magnetic core is connected with described inner tube one.
5. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, the distance of described magnetic core and sucker rod is less than 1 millimeter.
6. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, also comprises cable, and described cable is connected between described coil and described controller, and described controller is controlled energising and the outage of coil on every group of magnetic core by described cable.
7. well mouth of oil well electromagnetic heater according to claim 1, is characterized in that, the axial spacing between two groups of adjacent magnetic cores is greater than 10 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320390778 CN203362117U (en) | 2013-07-02 | 2013-07-02 | Well head electromagnetic heating device of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320390778 CN203362117U (en) | 2013-07-02 | 2013-07-02 | Well head electromagnetic heating device of oil well |
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| Publication Number | Publication Date |
|---|---|
| CN203362117U true CN203362117U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320390778 Expired - Lifetime CN203362117U (en) | 2013-07-02 | 2013-07-02 | Well head electromagnetic heating device of oil well |
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| Country | Link |
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| CN (1) | CN203362117U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291245A (en) * | 2013-07-02 | 2013-09-11 | 齐忠霞 | Oil wellhead electromagnetic heating device |
| CN114837616A (en) * | 2022-06-10 | 2022-08-02 | 西南石油大学 | Heating device for prevent oil production well oil pipe wax deposition |
-
2013
- 2013-07-02 CN CN 201320390778 patent/CN203362117U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291245A (en) * | 2013-07-02 | 2013-09-11 | 齐忠霞 | Oil wellhead electromagnetic heating device |
| CN103291245B (en) * | 2013-07-02 | 2015-08-26 | 齐忠霞 | Well mouth of oil well electromagnetic heater |
| CN114837616A (en) * | 2022-06-10 | 2022-08-02 | 西南石油大学 | Heating device for prevent oil production well oil pipe wax deposition |
| CN114837616B (en) * | 2022-06-10 | 2023-11-03 | 西南石油大学 | Heating device for prevent oil pipe wax deposition of oil production well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20150826 |
|
| RGAV | Abandon patent right to avoid regrant |