CN105422065A - Huff-and-puff oil production device with electric submersible reciprocating pump - Google Patents
Huff-and-puff oil production device with electric submersible reciprocating pump Download PDFInfo
- Publication number
- CN105422065A CN105422065A CN201511004225.5A CN201511004225A CN105422065A CN 105422065 A CN105422065 A CN 105422065A CN 201511004225 A CN201511004225 A CN 201511004225A CN 105422065 A CN105422065 A CN 105422065A
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- China
- Prior art keywords
- oil
- reciprocating pump
- hole
- piston cylinder
- water filling
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
Abstract
The invention belongs to the technical field of mechanical oil production and particularly provides a huff-and-puff oil production device with an electric submersible reciprocating pump. The huff-and-puff oil production device comprises an underground automatic water injection switch (6) for realizing water injection and oil production channel switching and an electric submersible reciprocating pump, wherein a liquid outlet (9) in the upper end of the underground automatic water injection switch (6) is connected with an oil pipe (4), and a liquid inlet (10) in the lower end of the underground automatic water injection switch (6) is connected with an oil outlet in the upper end of an electric submersible reciprocating pump through the oil pipe (4). The huff-and-puff oil production device is free of repeatedly tripping and has the characteristics of simple and convenient operation flow, high construction efficiency, safety, environment friendliness, low risk and the like as comparison with the traditional huff-and-puff oil production process. In addition, due to the adoption of an electric submersible reciprocating pump (a linear motor) device adopted in a lifting way, underground driving link is omitted, the eccentric wear of pipe poles is eliminated, the maintenance-free period of an oil well is prolonged, the huff-and-puff oil production device is suitable for a well with low liquid quantity, and the economic benefit can be effectively increased.
Description
Technical field
The present invention relates to technical field of mechanical oil extraction, specifically a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out.
Background technology
Cyclic water stimulation oil recovery technique is when strata pressure declines, when output is very low, to producing well water filling, renwing stratum pressure, then closing well certain hour, rely on the oil in self-priming effect and the matrix of capillary force replace, the oil utilizing the pressure drop that drives a well to make to displace and part inject the employing method of water together extraction, and it is the effective ways developing the Microreservoir raising recovery ratio that noenergy is supplemented.So far, this technique at home some oil fields is applied and achieves certain economic benefit, and the prospect having further genralrlization to apply.The cyclic water stimulation oil production technology flow process of current employing mostly is: lower water injection string → water filling → closing well balance → trip-out → lower machine adopts that tubing string → drive a well oil recovery, is called a cyclic water stimulation cycle.This just certainly will determine handles up in the cycle multiple, and need frequently to make a trip, cause efficiency of construction low, safety and environmental protection risk is high.
If the cyclic water stimulation extracting device of oil inventing a kind of fixed tubular column just can effectively solve this drawback.Solve the transmission link focusing on reducing oil pumping system of " fixed tubular column ".Oil-submersible electric reciprocating pump Rodless oil extraction technology, adopts linear electric motors as probe, to be inverted drop-down pump for executing agency, by reciprocating, down-hole liquid is lifted to ground.Which eliminate oil pumper and sucker rod, effectively can either reduce transmission link, eccentric wear can be eliminated again, raise the efficiency, reduce costs.Meanwhile, for realizing the down-hole conversion of water filling, oil recovery passage, design a kind of " down-hole automatic water filling switch " is also needed.When adopting water filling flow process, water filling switch open, oil-submersible electric reciprocating pump compressor emergency shutdown; When adopting oil production process, water filling switch cuts out, and oil-submersible electric reciprocating pump unit works.Along with reaching its maturity of horizontal well water exploration technology, be similar to the downhole tool of " intelligent water finding switch ", for the invention design of " down-hole automatic water filling switch " provides thinking.
Summary of the invention
The object of the invention is to overcome problem in above-mentioned prior art, there is provided a kind of fixed tubular column oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out, this device does not need to make a trip, and just can realize the automatic switchover of water filling, oil production process, make work flow easy, efficiency of construction is high.
Technical scheme of the present invention is: a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out, comprises for realizing down-hole automatic water filling switch that water filling and oil recovery passage switch mutually and oil-submersible electric reciprocating pump; Wherein down-hole automatic water filling switch upper end liquid outlet is connected with oil pipe, and its lower end inlet is connected by oil pipe with the oil-out of the upper end of oil-submersible electric reciprocating pump.Described down-hole automatic water filling switch comprises down-hole power, control circuit, drive motors and mechanical switch four parts being positioned at its seating nipple; Wherein down-hole power is electrically connected with drive motors and control circuit respectively, and control circuit is electrically connected with drive motors; Described mechanical switch comprises passageway bridge, lower piston cylinder, upper piston cylinder, piston and pressure gauge, wherein upper piston cylinder and lower piston cylinder are positioned at seating nipple, upper piston cylinder is positioned at the left side of lower piston cylinder and is on same coaxial line with lower piston cylinder, the internal diameter of two piston cylinders is equal and link together, barrel between upper and lower piston cylinder is provided with through hole, and this through hole is connected with seating nipple outside through waterflood path; Described piston is positioned at upper and lower piston cylinder, and the piston rod of piston is connected with the power transmission shaft of drive motors by ball-screw; Described passageway bridge is positioned at seating nipple, and it is as the liquid inlet and outlet at oil recovery channel connection seating nipple two ends, is also provided with the pressure gauge be connected with down-hole power and control circuit respectively in the inlet of seating nipple.
Above-mentioned control circuit is electrically connected with the switch board of outer wellhead.
Above-mentioned oil-submersible electric reciprocating pump comprises pull-down oil well pump, linear electric motors and oil-submersible cable; Wherein the lower end of pull-down oil well pump connects with the upper end of linear electric motors, the two composition rodless pump oil extraction system; The upper end of pull-down oil well pump connects with the lower end of down-hole automatic water filling switch; Described oil-submersible cable connects pull-down oil well pump and linear electric motors respectively and leads to outer wellhead.
Above-mentioned oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out is positioned at the sleeve pipe of down-hole, and oil-submersible cable is electrically connected with the switch board of outer wellhead.
The upper end of described pull-down oil well pump is fixedly connected with by screw thread with the lower end of down-hole automatic water filling switch.
Beneficial effect of the present invention: the oil extraction equipment using taking in and sending out that the present invention relates to does not need repeatedly to make a trip, more traditional huff and puff oil recovery technique is compared, and tool has the following advantages:
1. this oil extraction equipment using taking in and sending out does not need repeatedly to make a trip, and work flow is easy, and efficiency of construction is high, and safety and environmental protection risk is low;
2. " oil-submersible electric reciprocating pump " device adopted, reduces down-hole transmission link, eliminates side-abrasion of rod string, improves oil well repair free period, and is applicable to low liquid measure well, can effectively increase economic efficiency;
3. automaticity is high, and production procedure and production status can remote adjustment and monitoring, effectively reduce labour intensity.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is down-hole automatic water injection switching device schematic diagram;
Fig. 2 is oil-submersible electric reciprocating pump schematic diagram;
Fig. 3 is oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out tubing string figure.
Description of reference numerals: 1, well head; 2, switch board; 3, sleeve pipe; 4, oil pipe; 5, oil-submersible cable; 6, down-hole automatic water filling switch; 7, pull-down oil well pump; 8, linear electric motors; 9, liquid outlet; 10, inlet; 11, seating nipple; 12, passageway bridge; 13, lower piston cylinder; 14, upper piston cylinder; 15, piston; 16, pressure gauge; 17, waterflood path.
Detailed description of the invention
Embodiment 1:
See Fig. 2 and Fig. 3, the invention provides a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out, comprising for realizing down-hole automatic water filling switch 6 that water filling and oil recovery passage switch mutually and oil-submersible electric reciprocating pump; Wherein down-hole automatic water filling switch 6 upper end liquid outlet 9 is connected with oil pipe 4, and its lower end inlet 10 is connected by oil pipe 4 with the oil-out of the upper end of oil-submersible electric reciprocating pump.
Down-hole automatic water filling switch 6 comprises down-hole power, control circuit, drive motors and mechanical switch four functional units being positioned at its seating nipple 11; Wherein down-hole power is electrically connected with drive motors and control circuit respectively, and control circuit is electrically connected with drive motors; The direction of rotation of control circuit major control motor, realizes the conversion to " water filling-oil recovery " flow process.Down-hole power adopts High Temperature Lithium Cell, ambient temperature range-20oC ~+150oC, can realize big current continuous discharge, high impulse currents electric discharge.
As shown in Figure 1, described mechanical switch comprises passageway bridge 12, lower piston cylinder 13, upper piston cylinder 14, piston 15 and pressure gauge 16, wherein upper piston cylinder 14 and lower piston cylinder 13 are positioned at seating nipple 11, upper piston cylinder 14 is positioned at the left side of lower piston cylinder 13 and is on same coaxial line with lower piston cylinder 13, the internal diameter of two piston cylinders is equal and link together, upper and lower piston cylinder 14, the barrel between 13 is provided with through hole, and this through hole is connected with seating nipple 11 outside through waterflood path 17; Described piston 15 is positioned at upper and lower piston cylinder 14, and in 13, and the piston rod of piston 15 is connected with the power transmission shaft of drive motors by ball-screw; Drive motors is the executive component of water filling switch, and be equipped with multi-stage planetary gear speed reducer, maximum temperature reaches 125 DEG C, moment of torsion 5Nm, meets the instructions for use of down-hole high temperature, high pulling torque output.Described down-hole automatic water filling switch 6 is connected with oil pipe, passageway bridge 12 is positioned at the seating nipple 11 of down-hole automatic water filling switch 6, it is as the liquid inlet and outlet 10 at oil recovery channel connection seating nipple 11 two ends, 9, be also provided with the pressure gauge 16 be connected with down-hole power and control circuit respectively in the inlet 10 of seating nipple.When powering to drive motors, driving drive axis, and being converted to the rectilinear motion of piston by ball-screw.During oil production process, waterflood path is closed (namely piston movement is in upper piston cylinder 14), and well liquid is lifted to well head by the passageway bridge (oil recovery passage) in the middle of the automatic water filling switch 6 of down-hole; During water filling flow process, waterflood path is opened (namely piston movement is in lower piston cylinder 13), injects water and injects stratum by waterflood path 17.
The oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out that the present embodiment provides is installed in the sleeve pipe 3 of down-hole, and its oil-submersible electric reciprocating pump and down-hole automatic water filling switch are all electrically connected with the switch board 2 outside well head 1 and control by it.Wherein automatic water filling switch in down-hole is connected by not thickening plain tubing round thread with oil pipe, oil-submersible electric reciprocating pump, should install battery before going into the well, and the good corresponding control circuit of debugging, guarantee that down-hole automatic water filling switch can open and close; During oil production process, the waterflood path of down-hole automatic water filling switch is closed, and oil-submersible electric reciprocating pump unit is opened, and well liquid is lifted to well head by the oil recovery passage of down-hole automatic water filling switch; During water filling flow process, waterflood path is opened, and oil-submersible electric reciprocating pump unit is closed, and injects water and injects stratum by waterflood path.
Embodiment 2:
On the basis of embodiment 1, described oil-submersible electric reciprocating pump comprises pull-down oil well pump 7, linear electric motors 8 and oil-submersible cable 5; Wherein the lower end of pull-down oil well pump 7 connects with the upper end of linear electric motors 8, the two composition rodless pump oil extraction system; The upper end of pull-down oil well pump 7 connects with the lower end of down-hole automatic water filling switch 6; Described oil-submersible cable 5 connects pull-down oil well pump 7 and linear electric motors 8 respectively and leads to outer wellhead.
The pull-down oil well pump that this oil-submersible electric reciprocating pump adopts adopts the mode of operation pulling plunger discharge opeing downwards, is in extended state, effectively avoids mover eccentric wear when ensureing that electric mover is stressed.Oil well pump inlet is positioned at linear electric motors upper end, and linear electric motors are immersed in well liquid all the time, plays the cooling effect to motor.The linear electric motors adopted can think that electric rotating machine develops in the one of configuration aspects, and it can be regarded as radially cuts open an electric rotating machine, then by the circumference generate straight line of motor.The rotor of electric rotating machine develops into the secondary of linear electric motors, and stator develops into elementary.The linear motor of apolegamy adopts long elementary, short secondary structure, stator winding groove, rotor permanent magnet hermetic design.This Unit head can reach 1800m, stroke 0-1.5m, jig frequency 0 ~ 9 time/min, liquid measure 1-10m3/d, heatproof 180 DEG C (H level).
operating principle of the present invention:oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out provided by the invention is installed in the sleeve pipe 3 of down-hole, and the control circuit of its oil-submersible cable 5 and down-hole automatic water filling switch 6 is all electrically connected with the switch board 2 outside well head 1 and controls by it.Wherein automatic water filling switch in down-hole is connected by not thickening plain tubing round thread with oil pipe, pull-down oil well pump, should install battery, and debug control circuit, guarantee that switch can open and close before going into the well; Pull-down oil well pump and linear electric motors, by thread connection, form rodless pump oil extraction system.During oil production process, waterflood path is closed, and oil-submersible electric reciprocating pump unit is opened, and well liquid is lifted to well head by the passageway bridge (oil recovery passage) in the middle of water injection switching device; During water filling flow process, waterflood path is opened, and oil-submersible electric reciprocating pump unit is closed, and injects water and injects stratum by waterflood path.
The oil extraction equipment using taking in and sending out that the present invention relates to does not need repeatedly to make a trip, and more traditional huff and puff oil recovery technique is compared, the features such as have work flow easy, efficiency of construction is high, and safety and environmental protection risk is low.And " oil-submersible electric reciprocating pump (linear electric motors) " device that artificial lifting way adopts, reduces down-hole transmission link, eliminates side-abrasion of rod string, improves oil well repair free period, and is applicable to low liquid measure well, can effectively increase economic efficiency.
The part do not described in detail in present embodiment belongs to the known conventional means of the industry, does not describe one by one here.More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (5)
1. an oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out, is characterized in that: comprise for realizing down-hole automatic water filling switch (6) that water filling and oil recovery passage switch mutually and oil-submersible electric reciprocating pump; Wherein down-hole automatic water filling switch (6) upper end liquid outlet (9) is connected with oil pipe (4), and its lower end inlet (10) is connected by oil pipe (4) with the oil-out of the upper end of oil-submersible electric reciprocating pump; Described down-hole automatic water filling switch (6) comprises down-hole power, control circuit, drive motors and mechanical switch four parts being positioned at its seating nipple (11); Wherein down-hole power is electrically connected with drive motors and control circuit respectively, and control circuit is electrically connected with drive motors; Described mechanical switch comprises passageway bridge (12), lower piston cylinder (13), upper piston cylinder (14), piston (15) and pressure gauge (16), wherein upper piston cylinder (14) and lower piston cylinder (13) are positioned at seating nipple (11), upper piston cylinder (14) is positioned at the left side of lower piston cylinder (13) and is on same coaxial line with lower piston cylinder (13), the internal diameter of two piston cylinders is equal and link together, upper and lower piston cylinder (14,13) barrel between is provided with through hole, and this through hole is connected with seating nipple (11) outside through waterflood path (17); Described piston (15) is positioned in upper and lower piston cylinder (14,13), and the piston rod of piston (15) is connected with the power transmission shaft of drive motors by ball-screw; Described passageway bridge (12) is positioned at seating nipple (11), it is as the liquid inlet and outlet (10 at oil recovery channel connection seating nipple (11) two ends, 9) pressure gauge (16) be connected with down-hole power and control circuit respectively is also provided with in the inlet (10) of, seating nipple.
2. a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out as claimed in claim 1, is characterized in that: described control circuit is electrically connected with well head (1) switch board outward (2).
3. a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out as claimed in claim 1, is characterized in that: described oil-submersible electric reciprocating pump comprises pull-down oil well pump (7), linear electric motors (8) and oil-submersible cable (5); Wherein the lower end of pull-down oil well pump (7) connects with the upper end of linear electric motors (8), the two composition rodless pump oil extraction system; The upper end of pull-down oil well pump (7) connects with the lower end of down-hole automatic water filling switch (6); Described oil-submersible cable (5) connects pull-down oil well pump (7) and linear electric motors (8) respectively and leads to outer wellhead.
4. a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out as claimed in claim 2, it is characterized in that: this oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out is positioned at the sleeve pipe (3) of down-hole, and oil-submersible cable (5) is electrically connected with well head (1) switch board outward (2).
5. a kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out as claimed in claim 3, is characterized in that: the upper end of described pull-down oil well pump (7) is fixedly connected with by screw thread with the lower end of down-hole automatic water filling switch (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511004225.5A CN105422065B (en) | 2015-12-29 | 2015-12-29 | A kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out |
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| CN201511004225.5A CN105422065B (en) | 2015-12-29 | 2015-12-29 | A kind of oil-submersible electric reciprocating pump oil extraction equipment using taking in and sending out |
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| CN105422065A true CN105422065A (en) | 2016-03-23 |
| CN105422065B CN105422065B (en) | 2018-02-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019226072A1 (en) * | 2018-05-21 | 2019-11-28 | Акционерное общество "Новомет-Пермь" | Submersible pump assembly with a sealed motor |
| CN112814635A (en) * | 2021-03-27 | 2021-05-18 | 管芮 | Pulse type pressurization water injection string |
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