CN207437469U - A kind of jet pump and the well washing system with the jet pump - Google Patents

Abstract

The utility model provides a kind of jet pump and the well washing system with the jet pump, and jet pump includes end cap, central jet pipe and the lateral jet units of housing, closure at the one end open of housing；One end of central jet pipe is hermetically pierced by end cap, and the other end is set in housing, and lateral jet units are fixed between housing and central jet pipe, and the other end of central jet pipe exceeds one end end face of the lateral jet units away from end cap；At least two first through hole are opened up on central jet pipe；At least two axial passages are opened up in lateral jet units, one end of each axial passage penetrates into one end end face of lateral jet units, other end closure；At least two second through holes are opened up on housing, third through-hole and fourth hole, the connection corresponding with each first through hole of each third through-hole, the connection corresponding with each second through hole of each fourth hole are opened up on each axial passage.The utility model makes fluid mix twice, and energy high temperature hot wash, lost circulation prevention improve well washing effect.

Description

A kind of jet pump and the well washing system with the jet pump

Technical field

The utility model is related to the technical field of petroleum production engineering, more particularly to a kind of jet pump and washing with the jet pump Well system.

Background technology

In high-content wax oil well production process, oil pipe and sucker rod wax deposition phenomenon are extremely serious so that oil flow channel gradually becomes It is small or even block, oil well output is caused to reduce or even stop production, viscous crude producing well mix it is dilute than it is unreasonable when, it may appear that sucker rod Downlink difficult problem.In this regard, the common method in scene is hot clean-up well；Before surveying tune linkage subdivision injection well and being tested, Thorough well-flushing is needed to ensure in oil pipe without greasy dirt；It is also frequent before playing lower tubular column, base sealed packer during oil-water well operation Hot clean-up well is needed to remove dead oil in pit shaft, improves job execution success rate.To sum up, in crude oil production process, it is often necessary to more Secondary progress well-flushing operation.

Existing hot clean-up well technology is broadly divided into hot water well-flushing, steam well-flushing, hot nitrogen well-flushing.Using height in hot water well-flushing The hot water of temperature, since the density of water is higher, for missing serious oil-water well, flushing fluid is largely missed into stratum, Wu Fajian Vertical Xun Huan, influences well washing effect.Although steam well-flushing well-flushing vapor (steam) temperature higher, can carrying more heats, ensure well-flushing effect Fruit；But by equipment limit, pressure is usually no more than 20 megapascal, and discharge capacity is usually no more than 5 sides/hour, is carrying out deep-well well-flushing When also be difficult to establish cycle, and duration of well flushing is long.Since density of nitrogen is low in nitrogen well-flushing, it can effectively establish and wash for absorption well Well cycles, and well-flushing fluid is avoided to leak into stratum, so as to ensure well washing effect and prevent polluted reservoir；But simultaneously because well-flushing pressure And discharge capacity is high, in the row of returning due to gas slip effect, it is difficult to which greasy dirt and mechanical admixture are carried out completely, influences well-flushing effect Fruit.

Utility model content

It is inefficient for well-flushing in the washing well process of solution, the technical issues of well washing effect is bad, the utility model proposes A kind of jet pump and the well washing system with the jet pump, jet pump makes fluid mix twice, well washing system using jet pump as Mixer, using high pressure nitrogen as main fluid, steam and foaming agent as driven fluid, by injection twice and mixing, In addition the foam maker of rear end, realizes effective mixing of three kinds of different fluids, energy high temperature hot wash, lost circulation prevention improve well-flushing effect Fruit.

The utility model proposes a kind of jet pump, the jet pump includes the housing of tubular, closure the one of the housing End cap, central jet pipe and lateral jet units at end opening；

One end of the central jet pipe is hermetically pierced by the end cap, and the other end is set in the housing, described Lateral jet units are fixed in the toroidal cavity between the housing and the central jet pipe, the central jet pipe it is another One end exceeds one end end face of the lateral jet units away from the end cap；

At least two first through hole are opened up on the wall surface of the central jet pipe；Along its axis in the lateral jet units At least two axial passages are opened up, the quantity of the axial passage is identical with the quantity of the first through hole, and each axial direction is led to The one end in road penetrates into one end end face of the lateral jet units, other end closure respectively；

At least two second through holes, the quantity of second through hole and the quantity of the axial passage are opened up on the housing It is identical, open up third through-hole and fourth hole on the wall surface of each axial passage, the third through-hole close to the end cap, The fourth hole is away from the end cap；The third through-hole of each axial passage is corresponded with each first through hole Ground sealing connection, the fourth hole of each axial passage with each second through hole are sealed and connected correspondingly.

As a kind of enforceable mode, the housing is a cylinder, and the lateral jet units are a ring-shaped cylinder, institute Inner wall sealing of the inner side and outer side of ring-shaped cylinder respectively with the outer wall of the central jet pipe and the housing is stated to be connected.

As another enforceable mode, the lateral jet units include at least two cylinders, the number of the cylinder Amount is identical with the quantity of the first through hole, opens up an axial passage, the both sides difference of each cylinder on each cylinder respectively It is connected with the outer wall of the central jet pipe and the inner wall sealing of the housing.

Further, the axis of the central jet pipe is overlapped with the axis of the housing.

Further, the other end of each axial passage penetrates into the other end end of the lateral jet units respectively Face, the other end face of the lateral jet units and the medial surface palette of the end cap.

Further, the jet pump further includes the nozzle for the other end for being connected to the central jet pipe, the nozzle Sectional area reduce from the inside to the outside；

The housing includes sequentially connected first direct tube section, the first undergauge section, the second direct tube section and the first extension diameter section, institute Lateral jet units are stated between first direct tube section and the central jet pipe, the nozzle is located at first undergauge Duan Zhong.

Further, each axial passage includes the 3rd direct tube section, the second undergauge section, the 4th direct tube section and second respectively Extension diameter section, the third through-hole are located on the 3rd direct tube section, and the fourth hole is located on the 4th direct tube section.

Further, at least two flow subs, the quantity of the flow sub and institute are set on the outer wall of the housing State that the quantity of the second through hole is identical, each flow sub is close correspondingly with the outer end opening of each second through hole respectively Envelope connection.

Further, each first through hole and each third through-hole are in tilted layout, the center of the first through hole Line is overlapped with the center line of the third through-hole, the direction where the outer end opening towards the end cap of the third through-hole, Direction where interior end opening towards the fourth hole.

The utility model also proposes a kind of well washing system, and the well washing system includes：

Above-mentioned jet pump；

Nitrogen gas generating system, including the equipment of making nitrogen and nitrogen pipeline, one end of the nitrogen pipeline connects with the equipment of making nitrogen It connects, the one end open that the other end is pierced by end cap with central jet pipe is connected；

Vapour system, including steam generator and an at least steam pipework, one end of the steam pipework with it is described Steam generator connects, and the second through hole of the other end and partial amt connects one to one；

Foaming agent system, including storage tank and an at least foaming agent pipeline, one end of the foaming agent pipeline with it is described Storage tank connects, and the other end connects one to one with the second through hole remaining described；

Foam maker, with entrance and exit, the entrance is not provided with the other end of the end cap with the housing Opening connection；

Export pipeline, its one end are connected with the outlet, and the other end is connected with extraneous oil jacket annular space.

Further, the foam maker includes：

First mixing drum sets the first helical blade in inner cavity along its axial restraint；

Second mixing drum, the one end open of one end opening and first mixing drum are tightly connected, and with described first Mixing drum is coaxially disposed；The second helical blade, second spiral shell are set along its axial restraint in the inner cavity of second mixing drum The hand of spiral of vane piece is opposite with the hand of spiral of first helical blade；

Overcurrent partition plate is horizontally installed between first mixing drum and second mixing drum, the overcurrent partition plate Upper to set multiple meshes, the inner cavity of first mixing drum is connected by the mesh with the inner cavity of second mixing drum.

Further, the spiral angle of first helical blade is greater than or equal to 30 degree, and less than or equal to 60 degree； The spiral angle of second helical blade is greater than or equal to 30 degree, and less than or equal to 60 degree.

Further, the spiral angle of first helical blade is identical with the spiral angle of second helical blade.

Further, the equipment of making nitrogen is the film equipment of making nitrogen.

Further, the equipment of making nitrogen, the steam generator and the storage tank can move freely.

The beneficial effects of the utility model compared with the prior art lie in：The jet pump of the utility model, by central jet Pipe and lateral jet units form two stage jet pump.The fluid injected by the one end open of central jet pipe enters central jet pipe Inner cavity, by a part of fluid that central jet pipe injects from laterally successively through each first through hole and the corresponding third through-hole connected Into in corresponding axial passage, this segment fluid flow continues to flow in each axial passage to the direction away from end cap.

The jet pump of the utility model also passes sequentially through each second through hole and the corresponding fourth hole connected to corresponding axis Other fluids are injected into passage, other fluids are carried out with a part of fluid through the injection of central jet pipe in each axial passage Advance first time mixing, the fluid-mixing through first time mixing is in each axial passage to the direction away from end cap after afterflow It is dynamic, until lateral one end end face of the jet units away from end cap is flowed out, into the inner cavity of housing.

In addition, another part fluid injected from central jet pipe in the inner cavity of central jet pipe to the side away from end cap To continuing to flow, until another end opening outflow through central jet pipe, into the inner cavity of housing.This another part fluid with it is each Fluid-mixing through first time mixing in axial passage mix for second, then towards the side away from end cap in the inner cavity of housing To continuing to flow, until outwards being exported from the other end opening of housing.

The well washing system of the utility model realizes uniformly mixing, i.e., using side using the scheme of the two stage jet of jet pump Realize that level-one injection realizes two-stage injection with mixing with mixing, using central jet pipe to jet units.Using jet pump as mixed Clutch, by injection twice and mixing, is added using high pressure nitrogen as main fluid, steam and foaming agent as driven fluid The foam maker of upper rear end realizes effective mixing of three kinds of different fluids.

Using high temperature nitrogen foam as well-flushing fluid, there is high temperature, low-density, high carrying capacity, improve molten The ability of wax and reducing thick oil viscosity, while well-flushing Xun Huan can be effectively established, low pressure well well-flushing is avoided to miss.It employs nitrogen as high pressure Main fluid, it is ensured that mixed fluid has elevated pressures, realizes deep-well well-flushing.In addition, using high-temperature steam and nitrogen, bubble Foam is mixed into compound well-flushing fluid and carries out well-flushing, and well-flushing temperature is high, beneficial to wash-off greasy dirt and dewaxing.Nitrogen foam fluid density Low, the head of liquid generated in pit shaft is small, it is not easy to the high temperature nitrogen foam energy that leakage is formed into stratum, the utility model Well-flushing is avoided to miss, can effectively realize deep-well and absorption well well-flushing.

Description of the drawings

Fig. 1 is the main view diagrammatic cross-section of the jet pump of the utility model；

Fig. 2 is the main view diagrammatic cross-section of the embodiment one of the lateral jet units of the utility model；

Fig. 3 is the schematic front view of the well washing system of the utility model；

Fig. 4 is the schematic front view of the foam maker of the well washing system of the utility model.

Reference numeral：

1- vapour systems；11- steam generators；12- injection pumps；

2- nitrogen gas generating systems；The 21- equipments of making nitrogen；22- compressor sets；

3- foaming agent systems；31- storage tanks；32- plunger pumps；

4- jet pumps；

41- housings；The second through holes of 411-；

The first direct tube sections of 413-；414- the first undergauge sections；The second direct tube sections of 415-；The first extension diameter sections of 416-；

42- central jet pipes；422- first through hole；423- nozzles；

The lateral jet units of 43-；

430- axial passages；431- third through-holes；432- fourth holes；

The 3rd direct tube sections of 433-；434- the second undergauge sections；The 4th direct tube sections of 435-；The second extension diameter sections of 436-；

44- end caps；45- flow subs；

5- foam makers；

The first mixing drums of 51-；The first helical blades of 511-；

52- overcurrent partition plates；521- meshes；

The second mixing drums of 53-；The second helical blades of 531-；

6- well heads；61- sleeve gates；

7- down-hole strings；71- oil sets annular spaces.

Specific embodiment

Below in conjunction with attached drawing, the technical characteristic above-mentioned to the utility model and advantage are clearly and completely described, and show So, described embodiment is only the section Example rather than whole embodiments of the utility model.

Refering to Figure 1, the utility model proposes a kind of jet pump 4, jet pump 4 includes the housing 41 of tubular, center Jet pipe 42, lateral jet units 43 and end cap 44.

End cap 44 is blocked at the one end open of housing 41, and one end of central jet pipe 42 is hermetically pierced by end cap 44, The other end is set in housing 41, and toroidal cavity is formed between housing 41 and central jet pipe 42.Lateral jet units 43 are fixed In toroidal cavity, the other end of central jet pipe 42 exceeds one end end face of the lateral jet units 43 away from end cap 44；

At least two first through hole 422 are opened up on the wall surface of central jet pipe 42；Along its axis in lateral jet units 43 At least two axial passages 430 are opened up, the quantity of axial passage 430 is identical with the quantity of first through hole 422, each axial passage One end end face that 430 one end penetrates into lateral jet units 43 (away from end cap 44) respectively forms ejection end, another end seal It is stifled；

At least two second through holes 411, the quantity of the second through hole 411 and the quantity of axial passage 430 are opened up on housing 41 It is identical.It refers to shown in Fig. 2, by taking the embodiment one of lateral jet units 43 as an example, is opened up on the wall surface of each axial passage 430 Third through-hole 431 and fourth hole 432, third through-hole 431 lean on proximal cover 44, fourth hole 432 away from end cap 44, that is, It says, third through-hole 431 is than fourth hole 432 close to the one end open of housing 41.The third through-hole 431 of each axial passage 430 with Each first through hole 422 seals connection correspondingly, and the fourth hole 432 of each axial passage 430 and each second through hole 411 are one by one Accordingly sealing connection.

In other words, one end (inner end) of each axial passage 430 penetrates into lateral jet units 43 (away from end cap respectively 44) one end end face, so as to directly be connected with the inner cavity of housing 41；The other end (outer end) of each axial passage 430 passes sequentially through Third through-hole 431 and first through hole 422 are connected with the inner cavity of central jet pipe 42.One end (outer end) injection of central jet pipe 42 The other end (inner end) input housing 41 of the fluid not only through central jet pipe 42 inner cavity, the fluid of injection also leads to through each axial direction The outer end in road 430 is inputted in each axial passage 430, then the inner cavity of the input of the inner end through each axial passage 430 housing 41.

The jet pump 4 of the utility model forms two stage jet pump by central jet pipe 42 and lateral jet units 43.In The fluid of the one end open injection of heart jet pipe 42 enters the inner cavity of central jet pipe 42, one injected by central jet pipe 42 Shunting body enters corresponding axial passage 430 from the third through-hole 431 laterally connected successively through each first through hole 422 with correspondence Interior, this segment fluid flow continues to flow in each axial passage 430 to the direction away from end cap 44.

The jet pump 4 of the utility model also passes sequentially through each second through hole 411 and the corresponding fourth hole 432 connected to right Other fluids are injected in the axial passage 430 answered, in other interior fluids of each axial passage 430 and through the injection of central jet pipe 42 A part of fluid carries out advance first time mixing, and the fluid-mixing through first time mixing is in each axial passage 430 to separate The direction of end cap 44 continues to flow, until lateral one end end face of the jet units 43 away from end cap 44 is flowed out, into housing 41 Inner cavity.

Another part fluid injected from central jet pipe 42 is in the inner cavity of central jet pipe 42 to separate end cap 44 Direction (i.e. the inner cavity depths of housing 41) continues to flow, until the outflow of another end opening through central jet pipe 42, into housing 41 inner cavity.This another part fluid carries out second with the fluid-mixing mixed in each axial passage 430 through first time and mixes, Continue to flow towards the direction away from end cap 44 in the inner cavity of housing 41 again, until the other end opening from housing 41 is outwards defeated Go out.

The jet pump 4 of the utility model is in hot wash well operations, with nitrogen as high pressure main fluid, from center jet pipe 42 One end open at inject；Steam and foaming agent are injected from the external opening of each second through hole 411 as low-pressure injection fluid, The mixing twice of jet pump 4 through the utility model, can be sufficiently mixed fluid.

As a kind of enforceable mode, housing 41 is a cylinder, in embodiment one as shown in Figure 2, lateral jet stream list Member 43 is a ring-shaped cylinder, and the inner side and outer side of ring-shaped cylinder is close with the inner wall of the outer wall of central jet pipe 42 and housing 41 respectively Envelope connection.That is, the inside of ring-shaped cylinder is closely sleeved on the outside of central jet pipe 42, the inner wall of housing 41 closely covers Mounted in the outside of ring-shaped cylinder, make the first through hole 422 of central jet pipe 42 and 431 position face of third through-hole, housing 41 The position face of second through hole 411 and fourth hole 432.

More preferably, annular lateral jet units 43 are set in housing 41, are consolidated by step /V or by screw thread It is fixed.The end cap 44 of annular is sealed on one end of housing 41, is connected by screw thread with housing 41, plays sealing function.Central jet Pipe 42 is set in the centre bore of housing 41, is fixed by screw thread and end cap 44.In embodiment one, the side of housing 41 is symmetrical Processing is there are two the second through hole 411, and for the side face drilling of central jet pipe 42 there are two first through hole 422, first through hole 422 passes through side Third through-hole 431 in jet units 43 is connected with axial passage 430.

As another enforceable mode, i.e. embodiment two, lateral jet units 43 include at least two cylinders, cylinder Quantity it is identical with the quantity of first through hole 422, open up an axial passage 430 on each cylinder respectively, the both sides point of each cylinder Inner wall sealing not with the outer wall of central jet pipe 42 and housing 41 is connected.More preferably, housing 41 or a cylinder, each cylinder Inner wall of the both side surface respectively with the outer wall of central jet pipe 42 and housing 41 match, each cylinder can be consolidated by welding manner Due in toroidal cavity, ensure between central jet pipe 42 and cylinder, can reliably be sealed between cylinder and housing 41.

Further, as shown in Figure 1, the axis of central jet pipe 42 is overlapped with the axis of housing 41.In embodiment one, The uniform wall thickness of ring-shaped cylinder, cross section are positive annulus.In embodiment two, the shapes and sizes all same of each cylinder, just In processing and fabricating, certainly, the shapes and sizes of each cylinder also can be unlimited, i.e., the shapes and sizes of each cylinder can also differ or Person part same section is different, and details are not described herein.

Further, the other end of each axial passage 430 penetrates into the other end face of lateral jet units 43, side respectively To the other end face of jet units 43 and the medial surface palette of end cap 44.Each perforation of axial passage 430 is made to be arranged on ring In shape cylinder or cylinder, processing can be facilitated；The outer end of ring-shaped cylinder or cylinder is made to be resisted against the medial surface of end cap 44, to each axis Sealing blocking is formed to the other end of passage 430, by a part of fluid that central jet pipe 42 injects from 422 He of each first through hole The third through-hole 431 of corresponding connection enters in corresponding axial passage 430, and can flow to one end (inner end) of axial passage 430 Opening.

Further, jet pump 4 further includes the nozzle 423 for the other end for being connected to central jet pipe 42, and nozzle 423 is cut Area reduces from the inside to the outside.Housing 41 includes sequentially connected first direct tube section 413, the first undergauge section 414, the second direct tube section 415 and first extension diameter section 416, lateral jet units 43 are between the first direct tube section 413 and central jet pipe 42, nozzle 423 In the first undergauge section 414.

Fluid-mixing through first time mixing in each axial passage 430 is output to shell from the interior end opening of axial passage 430 In the inner cavity of body 41, since space increases suddenly, the fluid-mixing of mixing is between central jet pipe 42 and housing 41 for the first time It is spread, the nozzle 423 of taper is located in the first undergauge section 414, and the fluid-mixing of mixing is in the first undergauge section 414 for the first time By injection, the fluid-mixing mixed for the first time is arrived with another part fluid that central jet pipe 42 injects in the first undergauge section 414 On the path of second direct tube section 415, due to the reduced cross-sectional area of housing 41, fluid is accelerated, by the in the second direct tube section 415 Secondary mixing, the fluid-mixing of second of mixing are spread at increased first extension diameter section 416 of sectional area.

Further, as shown in Fig. 2, each axial passage 430 respectively include the 3rd direct tube section 433, the second undergauge section 434, 4th direct tube section 435 and the second extension diameter section 436, third through-hole 431 are located on the 3rd direct tube section 433, and fourth hole 432 is located at the On four direct tube sections 435.When fluid along central jet pipe 42 laterally successively through each first through hole 422 and the corresponding threeway connected When hole 431 is into axial passage 430, by injection in the second undergauge section 434, it is mixed in the 4th direct tube section 435, second It is spread in extension diameter section 436.

More preferably, the internal diameter of the 3rd direct tube section 433 is more than the internal diameter of third through-hole 431, when fluid is along central jet pipe 42 It is lateral connect through first through hole 422 with corresponding the entrance axial passage 430 of third through-hole 431 when, in third through-hole 431 At end opening, since the internal diameter of the 3rd direct tube section 433 becomes larger suddenly, fluid is spread.More preferably, each axial passage 430 also wraps The 5th direct tube section being arranged on after the second extension diameter section 436 is included, the 5th direct tube section makes the fluid Energy velocity of diffusion smoothly export Into the inner cavity of housing 41.

Further, as shown in Figure 1, setting at least two flow subs 45 on the outer wall of housing 41, flow sub 45 Quantity is identical with the quantity of the second through hole 411, and each flow sub 45 corresponds respectively with the outer end opening of each second through hole 411 Ground sealing connection.

More preferably, the outer end opening of fourth hole 432 is in the bell mouth shape of outside flaring, and the outer end of fourth hole 432 The bore of opening is identical with the internal diameter of the second through hole 411, when making other extraneous fluids by the second 411 inside injection of through hole, It after being accelerated at horn mouth, enters back into the 4th direct tube section 435, is conducive to carry out with the fluid in axial passage 430 abundant First time mixing.

Further, each first through hole 422 and each third through-hole 431 are in tilted layout, the center line of first through hole 422 with The center line of third through-hole 431 overlaps, the direction where the outer end opening towards end cap 44 of third through-hole 431, interior end opening Direction towards where fourth hole 432.

More preferably, make the arrival end of first through hole 422 that it is suitable to be conducive to fluid towards one end (outer end) of central jet pipe 42 Freely enter in axial passage 430；And first through hole 422 is identical with the internal diameter of third through-hole 431, fluid can without resistance by First through hole 422 enters third through-hole 431.

It refers to shown in Fig. 3, the utility model also proposes a kind of well washing system, and well washing system includes vapour system 1, nitrogen processed System 2, foaming agent system 3, above-mentioned jet pump 4, foam maker 5 and export pipeline.

Nitrogen gas generating system 2 includes the equipment of making nitrogen 21 and nitrogen pipeline, and one end of nitrogen pipeline is connected with the equipment of making nitrogen 21, another The one end open that one end is pierced by end cap 44 with central jet pipe 42 is connected.

Vapour system 1 includes steam generator 11 and an at least steam pipework, one end of steam pipework and steam generation Device 11 connects, and the second through hole 411 of the other end and partial amt connects one to one.Foaming agent system 3 includes 31 He of storage tank An at least foaming agent pipeline, one end of foaming agent pipeline are connected with storage tank 31, the other end and remaining second through hole 411 1 One is correspondingly connected with.In other words, the sum of quantity of steam pipework and foaming agent pipeline is equal to 411 (i.e. axial passage of the second through hole 430 or first through hole 422) quantity.More preferably, the quantity of axial passage 430 is 2 to 4.

Foam maker 5 has entrance and exit, and another end opening that entrance is not provided with end cap 44 with housing 41 is connected.It is defeated The one end and outlet for going out pipeline connect, and the other end is connected with extraneous oil jacket annular space.There is very high interface after foaming agent foam Tension, as the fluid used in clean-out service, the ability that there is higher carrying of liquids to squeeze mechanical admixture is conducive to greasy dirt And impurity washes out pit shaft.

More preferably, vapour system 1 further includes injection pump 12, and nitrogen gas generating system 2 further includes compressor set 22, foaming agent system 3 Further include plunger pump 32.After the high-purity nitrogen that the equipment of making nitrogen 21 generates is pressurized by compressor set 22 (i.e. air compressor machine), by nitrogen Air pipe enters jet pump 4, is sprayed at a high speed from the nozzle 423 of jet pump 4, and low-pressure injection area, steam hair are formed in jet pump 4 After the low mass dryness fraction steam that raw device 11 generates is pressurizeed by injection pump 12, into low-pressure injection area, the high-temperature foaming agent in storage tank 31 passes through After plunger pump 32 pressurizes, also into low-pressure injection area, nitrogen, low mass dryness fraction steam, high-temperature foaming agent uniformly mix in jet pump 4 After forming big foam, processed again into foam maker 5.

Sleeve valve 61 at well head 6 is set, down-hole string 7 is transferred in casing, shape between down-hole string 7 and casing Into oil sets annular space 71, the high temperature nitrogen foam that foam maker 5 exports is successively by export pipeline and sleeve valve 61, note Enter the oil sets annular space 71 of underground, realize hot clean-up well.

The well washing system of the utility model possesses high temperature hot wash, the effect of lost circulation prevention, can improve the well-flushing of low pressure oil-water well Effect.Since the fluid for needing to mix has high-temperature steam, foaming agent, nitrogen, fluid properties differ greatly, using jet pump 4 The scheme of two stage jet realizes uniformly mixing, i.e., realizes that level-one injection is penetrated with mixing, using center using lateral jet units 43 Flow tube 42 realizes two-stage injection with mixing.More preferably, compressor set 22 can provide the pressure of up to 40 megapascal, and 12 He of injection pump The injection pressure of plunger pump 32 is usually no more than 15 megapascal, and nitrogen gas generating system 2 can provide it is more than 1500 standard cubic meters continuous Stablize discharge capacity, therefore select nitrogen as high pressure main fluid, steam and foaming agent as low pressure time fluid.

The well washing system concrete implementation method of the utility model is as follows：Nitrogen pipeline and the central jet pipe of jet pump 4 42 connections, steam pipework and foaming agent pipeline respectively with second through hole 411 in 41 outside of the housing of jet pump 4 (or flow sub 45) connect.After the entrance of center jet pipe 42, a part of high pressure nitrogen is connected high pressure nitrogen by first through hole 422 with correspondence Third through-hole 431 enters lateral jet units 43, is sprayed in axial passage 430 and forms low-pressure injection area, while the second through hole Steam and foaming agent are sucked the 4th direct tube section 435 by 411 (or flow subs 45) through fourth hole 432 respectively, in fourth hole 432 inner end opening, steam and foaming agent are spread, and realize nitrogen and steam or preliminary (first time) of nitrogen and foaming agent Mixing.It is sprayed from another part high pressure nitrogen that center jet pipe 42 enters by the nozzle 423 of central jet pipe 42, in jet stream Low pressure is formed by injection in first undergauge section 414 of the housing 41 of pump 4, and the nitrogen with tentatively mixing, steam and foaming agent Mixture carries out second and mixes, the immixture successively through the second direct tube section 415, the diffusion shape of the first extension diameter section 416 Into metastable high temperature nitrogen foam.

The well washing system of the utility model, using jet pump 4 as mixer, using high pressure nitrogen as main fluid, steam With foaming agent as driven fluid, by injection twice and mixing, in addition the foam maker 5 of rear end, realizes three kinds of differences Effective mixing of fluid.High pressure nitrogen is as main fluid, it is ensured that mixed fluid has high pressure, it can be achieved that deep-well well-flushing； Deep-well well-flushing, to replace out original fluid in pit shaft, nitrogen pressure may need to be up to 25~40 megapascal.In addition, steam for 150~ 200 degrees Celsius of low mass dryness fraction steam, and the temperature of general hot water well-flushing is 75~90 degrees Celsius, using high-temperature steam and nitrogen, Foams mix carries out well-flushing into compound well-flushing fluid, and well-flushing temperature is high, beneficial to wash-off greasy dirt and dewaxing.Nitrogen foam fluid density Low, the head of liquid generated in pit shaft is small, it is not easy to which into stratum, water column pressure is high during hot water well-flushing, easily leaks into for leakage Stratum, the high temperature nitrogen foam that the utility model is formed are avoided that well-flushing is missed, can effectively realize deep-well and absorption well well-flushing.

In embodiment shown in Fig. 3, between nitrogen pipeline and the equipment of making nitrogen 21, nitrogen pipeline and central jet pipe 42 it Between, between steam pipework and steam generator 11, between steam pipework and the second through hole 411, foaming agent pipeline and storage tank 31 it Between between foaming agent pipeline and the second through hole 411 be screwed connection.Jet pump 4 passes through flanged joint with foam maker 5； The export pipeline that foam maker 5 connects is connected by flange or screw thread with the interface at sleeve gate 61.

The well washing system of the present embodiment, there are two (i.e. two first through hole of axial passage 430 for the lateral tool of jet units 43 422 or two the second through holes 411 again or two flow subs 45).The equipment of making nitrogen 21 passes through nitrogen pipeline and the center of jet pump 4 Jet pipe 42 connects；Steam generator 11 is connected by steam pipework with one of flow sub 45；Storage tank 31 passes through foaming Agent pipeline is connected with another flow sub 45；Above-mentioned connection mode is screwed connection.Jet pump 4 is logical with foam maker 5 Cross flanged joint；Foam maker 5 is connected by export pipeline with the interface at sleeve gate 61, and connection mode is flange and silk Button connection.

Further, refer to shown in Fig. 4, foam maker 5 includes the first mixing drum 51, overcurrent partition plate 52 and second stirs Mix cylinder 53.The first helical blade 511 is set along its axial restraint in the inner cavity of first mixing drum 51.One end of second mixing drum 53 Opening and the one end open of the first mixing drum 51 are tightly connected, and are coaxially disposed with the first mixing drum 51.Second mixing drum 53 The second helical blade 531, the hand of spiral and the first helical blade of the second helical blade 531 are set along its axial restraint in inner cavity 511 hand of spiral is opposite.Overcurrent partition plate 52 is horizontally installed between the first mixing drum 51 and the second mixing drum 53, overcurrent partition plate Multiple meshes 521 are set on 52, and the inner cavity of the first mixing drum 51 is connected by mesh 521 with the inner cavity of the second mixing drum 53.

Foam maker 5 passes through the auger of the first helical blade 511 and the second helical blade 531, the first helical-blade The crumbling method of the mesh 521 of paliform, shape on the reverse agitating function of 511 and second helical blade 531 of piece and overcurrent partition plate 52 Into stable high temperature nitrogen foam.By auger, the damaged height for forming smaller, evenly stablizing in foam maker 5 Warm nitrogen foam.More preferably, foaming agent heatproof reaches 300 degrees Celsius or more, ensures to form stable nitrogen bubble under the condition of high temperature Foam.

The well washing system of the utility model, as well-flushing fluid, is had the following advantages that using high temperature nitrogen foam：With height The advantages of temperature, low-density, high carrying capacity, improves the ability of molten wax and reducing thick oil viscosity, while can effectively establish well-flushing Xun Huan, keeps away Exempt from the leakage of low pressure well well-flushing.It employs nitrogen as high pressure main fluid, it is ensured that mixed fluid has elevated pressures, realizes depth Well well-flushing.Ensure to form stable high temperature nitrogen foam using the jet pump 4 and foam maker 5 of two-stage mixing.

Further, the spiral angle of the first helical blade 511 is greater than or equal to 30 degree, and less than or equal to 60 degree； The spiral angle of second helical blade 531 is greater than or equal to 30 degree, and less than or equal to 60 degree.

Further, the spiral angle of the first helical blade 511 is identical with the spiral angle of the second helical blade 531.Fig. 4 In shown embodiment, the spiral angle of the spiral angle of the first helical blade 511 and the second helical blade 531 is 45 degree.

Further, the equipment of making nitrogen 21 is the film equipment of making nitrogen, the small volume of nitrogen gas generating system by membrane, convenience in transport or movement.

Further, the equipment of making nitrogen 21, steam generator 11 and storage tank 31 can move freely.The equipment of making nitrogen 21 is vehicle-mounted The film equipment of making nitrogen, steam generator 11 are steam well-washing truck, and storage tank 31 injects vehicle for foaming agent, freedom is realized by vehicle-mounted mode It is mobile.Consider that well washing system is mainly used for mobile well-flushing, scene, which disconnects electricity, needs professional electrician to operate, and well site transformer capacity Differ the condition for surely meeting three complete equipments while access, and the film equipment of making nitrogen, compressor set 22, injection pump 12, plunger pump 32 are equal It is driven using vehicle-mounted fuel engines.

Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect The detailed description of step, it should be understood that the foregoing is merely specific embodiment of the utility model, are not used to limit this reality With new protection domain.Particularly point out, to those skilled in the art, it is all the spirit and principles of the utility model it Any modification, equivalent substitution, improvement and etc. that are interior, being done, should be included within the scope of protection of this utility model.

Claims (15)

1. a kind of jet pump, which is characterized in that the housing of the jet pump including tubular, closure the housing one end open End cap, central jet pipe and the lateral jet units at place；

One end of the central jet pipe is hermetically pierced by the end cap, and the other end is set in the housing, described lateral Jet units are fixed in the toroidal cavity between the housing and the central jet pipe, the other end of the central jet pipe Beyond one end end face of the lateral jet units away from the end cap；

At least two first through hole are opened up on the wall surface of the central jet pipe；It is opened up in the lateral jet units along its axis At least two axial passages, the quantity of the axial passage is identical with the quantity of the first through hole, each axial passage One end end face that one end penetrates into the lateral jet units respectively forms ejection end, other end closure；

At least two second through holes, the quantity of second through hole and the quantity phase of the axial passage are opened up on the housing Together, third through-hole and fourth hole are opened up on the wall surface of each axial passage, the third through-hole is close to the end cap, institute Fourth hole is stated away from the end cap；The third through-hole of each axial passage and each first through hole are correspondingly Sealing connection, the fourth hole of each axial passage with each second through hole are sealed and connected correspondingly.

2. jet pump according to claim 1, which is characterized in that the housing be a cylinder, the lateral jet units For a ring-shaped cylinder, the inner side and outer side of the ring-shaped cylinder respectively in the outer wall and the housing of the central jet pipe Wall is tightly connected.

3. jet pump according to claim 1, which is characterized in that the lateral jet units include at least two cylinders, The quantity of the cylinder is identical with the quantity of the first through hole, opens up an axial passage, each column on each cylinder respectively Inner wall sealing of the both sides of body respectively with the outer wall of the central jet pipe and the housing is connected.

4. jet pump according to claim 1, which is characterized in that the axis of the central jet pipe and the axis of the housing Line overlaps.

5. jet pump according to any one of claims 1 to 4, which is characterized in that the other end of each axial passage point The other end face of the lateral jet units, the other end face and the end cap of the lateral jet units are not penetrated into Medial surface palette.

6. jet pump according to any one of claims 1 to 4, which is characterized in that the jet pump, which further includes, is connected to institute The nozzle of the other end of central jet pipe is stated, the sectional area of the nozzle reduces from the inside to the outside；

The housing includes sequentially connected first direct tube section, the first undergauge section, the second direct tube section and the first extension diameter section, the side To jet units between first direct tube section and the central jet pipe, the nozzle is located at the first undergauge section In.

7. jet pump according to any one of claims 1 to 4, which is characterized in that each axial passage includes the respectively Three direct tube sections, the second undergauge section, the 4th direct tube section and the second extension diameter section, the third through-hole are located on the 3rd direct tube section, The fourth hole is located on the 4th direct tube section.

8. jet pump according to any one of claims 1 to 4, which is characterized in that set at least on the outer wall of the housing Two flow subs, the quantity of the flow sub is identical with the quantity of second through hole, each flow sub respectively with The outer end opening of each second through hole seals connection correspondingly.

9. jet pump according to any one of claims 1 to 4, which is characterized in that each first through hole and each described Three through holes are in tilted layout, and the center line of the first through hole is overlapped with the center line of the third through-hole, the third through-hole Outer end opening towards the end cap where direction, the direction where interior end opening towards the fourth hole.

10. a kind of well washing system, which is characterized in that the well washing system includes：

Claim 1 to 9 any one of them jet pump；

Nitrogen gas generating system, including the equipment of making nitrogen and nitrogen pipeline, one end of the nitrogen pipeline is connected with the equipment of making nitrogen, The one end open that the other end is pierced by end cap with central jet pipe is connected；

Vapour system, including steam generator and an at least steam pipework, one end of the steam pipework and the steam Generator connects, and the second through hole of the other end and partial amt connects one to one；

Foaming agent system, including storage tank and an at least foaming agent pipeline, one end and the storage tank of the foaming agent pipeline Connection, the other end connect one to one with the second through hole remaining described；

Foam maker, with entrance and exit, the entrance is not provided with another end opening of the end cap with the housing Connection；

Export pipeline, its one end are connected with the outlet, and the other end is connected with extraneous oil jacket annular space.

11. well washing system according to claim 10, which is characterized in that the foam maker includes：

First mixing drum sets the first helical blade in inner cavity along its axial restraint；

Second mixing drum, one end opening and the one end open of first mixing drum are tightly connected, and are stirred with described first Cylinder coaxial arrangement；The second helical blade, second helical-blade are set along its axial restraint in the inner cavity of second mixing drum The hand of spiral of piece is opposite with the hand of spiral of first helical blade；

Overcurrent partition plate is horizontally installed between first mixing drum and second mixing drum, is set on the overcurrent partition plate Multiple meshes are put, the inner cavity of first mixing drum is connected by the mesh with the inner cavity of second mixing drum.

12. well washing system according to claim 11, which is characterized in that the spiral angle of first helical blade is more than Or equal to 30 degree, and less than or equal to 60 degree；The spiral angle of second helical blade be greater than or equal to 30 degree, and be less than or Equal to 60 degree.

13. well washing system according to claim 11, which is characterized in that the spiral angle of first helical blade and institute The spiral angle for stating the second helical blade is identical.

14. well washing system according to claim 10, which is characterized in that the equipment of making nitrogen is the film equipment of making nitrogen.

15. well washing system according to claim 10, which is characterized in that the equipment of making nitrogen, the steam generator and The storage tank can move freely.