CN117588187B - Screw pump driven high-lift jet flow drainage device and use method - Google Patents
Screw pump driven high-lift jet flow drainage device and use method Download PDFInfo
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- CN117588187B CN117588187B CN202410080134.2A CN202410080134A CN117588187B CN 117588187 B CN117588187 B CN 117588187B CN 202410080134 A CN202410080134 A CN 202410080134A CN 117588187 B CN117588187 B CN 117588187B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 133
- 238000010992 reflux Methods 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 100
- 238000009792 diffusion process Methods 0.000 claims description 25
- 238000000605 extraction Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 239000010985 leather Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/124—Adaptation of jet-pump systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to the technical field of oil-gas well and coalbed methane well drainage engineering, in particular to a screw pump driven high-lift jet drainage device and a use method thereof. The technical proposal is as follows: the driving head is arranged at the upper part of the large four-way joint, the screw pump is connected to a casing cavity under the well through an oil pipe, the reflux cover is arranged at the outer side of the screw pump, the anchor and the jet pump are connected under the screw pump through the oil pipe, the anchor and the inner wall of the casing are anchored, the jet pump and the screw pump are connected in series, and the jet pump is positioned under the screw pump for a distance. The beneficial effects of the invention are as follows: according to the invention, the screw pump and the jet pump are organically connected in series into a whole according to the deep oil and gas well drainage requirement, the system operation is optimized by adjusting the rotating speed of the screw pump, the advantages of high pump efficiency, good management, solid-liquid suction and easy metering of the screw pump are integrated, and the advantages of no moving part, flexible and easy adjustment of the working system and suitability for sucking complex media of a highly-inclined well are utilized.
Description
Technical Field
The invention relates to the technical field of oil-gas well and coalbed methane well drainage engineering, in particular to a screw pump driven high-lift jet drainage device and a use method thereof.
Background
In the drainage of deep wells with working fluid levels larger than 4000 meters from the ground in the existing oil gas well and coal bed gas well, such high lifting lift cannot be achieved by adopting a single-stage pump, and formation production fluid in the deep well is difficult to lift to the ground normally. Although the screw pump can meet the vertical well with high solid phase particle content of the lifting liquid, the screw pump can not meet the requirements of a deep well and a highly-inclined well; the existing jet pump lifting lift and system efficiency are difficult to meet the requirements of deep extraction. Therefore, the existing lifting device cannot meet the production and energy-saving requirements of high and low levels before and after the formation liquid supply capability, particularly an oil-gas well and a deep coal-bed gas well which need deep pumping and extraction after fracturing, and an ideal deep well extraction device is lacking.
The patent application number of China, which is applied by the company in 2023, 11 and 14 days, is CN202311513901.6, the patent name is an underground pressurizing jet deep extraction liquid device and a using method, and the technical scheme is as follows: the device comprises a liquid storage tank, an extraction liquid pipe, a power liquid pipe, an electric control cabinet, a diversion shield, an electric submersible pump and a jet pump with more than one level, wherein the liquid storage tank is arranged on the liquid storage tank; the upper end of the electric submersible pump is connected to a ground power supply through a power supply cable. The invention adopts the series connection combination of the electric submersible pump and the jet pump with more than one stage, reduces the problems of large floor area of ground equipment, high equipment energy consumption, excessive noise and the like, also avoids the problem of high-pressure safety risk of a wellhead, and can realize the continuous liquid extraction and extraction operation of an oil-gas deep well. The invention meets the requirements of deep wells and highly inclined wells, but is not suitable for deep wells and high gas-liquid ratio wells with high solid phase particles and high gas-liquid ratio in lifting liquid.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a screw pump driven high-lift jet flow drainage device and a use method thereof, which save the occupied space of ground drainage equipment, remarkably improve the operation reliability, and are more suitable for deep high-inclination wells, horizontal wells, wells with more complex working conditions such as high sand content and high gas content of pumped media, and realize high-lift jet flow drainage.
The invention relates to a screw pump driven high-lift jet drainage device, which has the technical scheme that: the well head is provided with a well head liquid outlet valve and a sleeve gate, the well head liquid outlet valve is communicated with the upper end of an oil pipe, and the sleeve gate is communicated with the upper end of a sleeve; the screw pump is connected to the casing inner chamber in the pit through oil pipe, the outside installation backward flow cover of screw pump, and the upper portion of backward flow cover is equipped with the circulation hole of going up liquid flow, and the lower part of backward flow cover is equipped with the circulation hole of flowing down, is equipped with the screw pump rotor at the inner chamber of screw pump, and the upper end of screw pump rotor passes through the connecting rod to be connected with the output of drive head the below of screw pump passes through oil pipe connection anchor and jet pump, through anchor and sheathed tube inner wall anchor, concatenates with the screw pump through the jet pump, and the jet pump is located the below one section distance of screw pump, the fixed valve is connected to the below of jet pump, and screen pipe and plug are connected to the below of fixed valve.
Preferably, a small oil pipe is installed in the oil pipe below the screw pump, the upper end of the small oil pipe is connected to the lower end of the screw pump, and the lower end of the small oil pipe is connected to the upper end of the jet pump.
Preferably, the jet pump adopts a reverse circulation jet pump or a positive circulation jet pump; when a jet pump with reverse circulation is adopted, the screw pump connected with the upper end is installed in the forward direction, and the liquid flow is lifted upwards; when the positive circulation jet pump is adopted, the screw pump connected with the upper end is inversely installed, and the liquid flow is pressurized downwards.
Preferably, the reverse circulation jet pump comprises a reverse circulation jet pump body, a throat pipe, a nozzle, a stratum fluid channel, a lower joint, a power fluid inlet, a diffusion cavity, a mixing cavity and an upper joint, wherein the nozzle is arranged in the inner cavity of the reverse circulation jet pump body, the throat pipe is arranged above the nozzle, the upper part of the throat pipe is communicated with the diffusion cavity, the lower end of the nozzle is communicated with the power fluid inlet, the stratum fluid channel is formed by the outer wall of the nozzle and the inner wall of the reverse circulation jet pump body, and a cavity formed between the nozzle and the throat pipe is the mixing cavity; the lower end of the reverse circulation jet pump body is provided with a lower joint, and the upper end of the diffusion cavity is connected with an upper joint.
Preferably, the positive circulation jet pump comprises a throat, a nozzle, a power liquid inlet, an upper joint, a pump core assembly, a pump barrel, a mixed liquid second outlet, a check valve, a stratum liquid inlet, a salvage head and a mixed liquid first outlet, wherein the pump core assembly is arranged in an inner cavity of the pump barrel, the upper end of the pump barrel is connected with a small oil pipe, the lower side of the pump barrel is provided with the mixed liquid second outlet, a mixed liquid discharging channel is formed between the inner wall of the oil pipe and the outer wall of the pump barrel, and the outer wall of the lower end of the pump barrel is connected with the oil pipe; the top installation salvage head of pump core assembly, the downside of salvage head is equipped with more than one power fluid inlet, the inner chamber of pump core assembly is equipped with the nozzle, and the below of nozzle is equipped with the choke, and the downside of choke is equipped with the diffusion chamber, and the downside of diffusion chamber is equipped with the first export of mixed liquor, the lower extreme of pump core assembly be equipped with the uniflow valve, the lower extreme of pump barrel is equipped with stratum liquid inlet pump.
Preferably, a pump lifting leather cup is arranged at the lower side of the power fluid inlet, and the pump lifting leather cup is positioned between the pump cylinder and the pump core assembly.
Preferably, a stratum fluid channel is arranged at the middle lower part of the pump core assembly, the lower end of the stratum fluid channel is communicated with the upper end of the check valve, and the upper part of the stratum fluid channel is communicated with the upper end of the venturi so that the power fluid and the stratum fluid flow along the diffusion cavity of the lower part of the venturi after being mixed; the first mixed liquid outlet is communicated with the second mixed liquid outlet, and the mixed liquid enters an annular space formed between the pump cylinder and the oil pipe along the second mixed liquid outlet to drain upwards.
The application method of the screw pump driven high-lift jet drainage device comprises the following steps:
firstly, a tool string connected with a reverse circulation jet pump, a fixed valve, a screen pipe and a plug is put into the lower part of a well along a sleeve in a deep well through an oil pipe, then a small oil pipe is connected to the top end of the reverse circulation jet pump, the upper end of the small oil pipe is connected to the lower end of a screw pump which is installed in the forward direction, so that the jet pump is connected with a power liquid channel in the screw pump, the outer wall of the top end of the jet pump is connected with the oil pipe, and then the tool string is fixed on the inner wall of the sleeve through an anchor; then, the forward installed screw pump covered with the reflux cover and the matched oil pipe are put into the underground design depth, an anchor and a wellhead device are firmly seated, then a connecting rod connected with a screw pump rotor is put into the inner cavity of a stator of the screw pump, and then the upper end of the connecting rod is connected with the output end of a driving head; finally, allocating the wellhead device and the driving head, and connecting a power supply and control circuit of the driving head;
then, a driving head arranged on the large four-way joint is started, the driving head drives the connecting rod to rotate, and then a screw pump rotor in the screw pump is driven to rotate, under the upward pumping action of the screw pump, water in the oil pipe enters the backflow cover along the upper liquid flow circulation hole and then is sprayed downwards along the lower liquid flow circulation hole, and is sprayed downwards along an annulus formed between the small oil pipe and the oil pipe, and is sent to a reverse circulation jet pump below to be used as power liquid, and is sent to a nozzle along more than one power liquid inlet to be sprayed, under the negative pressure action, stratum liquid is driven to be mixed with the power liquid upwards along a stratum liquid channel, and is sent into the small oil pipe upwards along the diffusion cavity, and is further pumped upwards by the screw pump above to be discharged, part of the mixed liquid is sent to the ground along the oil pipe, and is discharged through the wellhead liquid outlet valve, and the other part of the mixed liquid enters the backflow cover through the upper liquid flow circulation hole and is continuously sprayed downwards along the lower liquid flow circulation hole to be used as the power liquid of the jet pump, so that the stratum liquid is continuously lifted to the ground from the bottom of the well to reach the complex production condition of solid phase and the solid phase containing particles.
The application method of the screw pump driven high-lift jet drainage device comprises the following steps:
firstly, a tool string connected with a positive circulation jet pump, a fixed valve, a screen pipe and a plug is put into the lower part of a well along a sleeve in a deep well through an oil pipe, then the top end of the positive circulation jet pump is connected with a small oil pipe, the outer wall of the small oil pipe is connected with the oil pipe, and the small oil pipe is fixed on the inner wall of the sleeve through an anchor; connecting the upper end of the small oil pipe with the lower end of the screw pump which is inversely installed, and putting the screw pump which is inversely installed and covered with the reflux cover into a downhole design position, wherein the lower end of the connecting rod is connected with a screw pump rotor, and the upper end of the connecting rod is connected with the output end of the driving head;
then, a driving head arranged on the large four-way joint is started, the driving head drives the connecting rod to rotate, and then the screw pump rotor in the screw pump is driven to rotate, under the downward pressurizing action of the screw pump, water in the oil pipe is sprayed downwards along the small oil pipe and is delivered to the positive circulation jet pump above the screw pump as power fluid, and is delivered to the nozzle along more than one power fluid inlet to be sprayed out, under the negative pressure action, stratum fluid is driven to be mixed with the power fluid upwards along a stratum fluid channel, and is delivered downwards along a diffusion cavity to the annulus of the pump core assembly and the pump cylinder, and is delivered upwards along the annulus formed between the pump cylinder and the oil pipe through a mixed fluid second outlet arranged on the pump cylinder, and is delivered upwards to the annulus formed between the oil pipe and the small oil pipe, and is delivered into the backflow cover through the lower fluid circulation hole, and is delivered to the oil pipe above the screw pump through the upper fluid circulation hole, wherein part of the mixed fluid is delivered to the ground through the wellhead fluid outlet valve, and the other part of the mixed fluid is delivered to the ground along the screw pump, and is delivered to the ground as positive circulation jet pump, and the continuous fluid is delivered to the ground, so that the continuous fluid is continuously pumped to the well, and the continuous fluid is produced to the ground, and the continuous fluid has no continuous lifting effect to the condition of the continuous fluid.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the screw pump and the jet pump are organically combined into a whole according to the requirements of deep oil and gas well extraction, the rotation speed of the screw pump is regulated to optimize the operation, the advantages of high pump efficiency, good management, capability of sucking solid-containing and gas-containing liquid of the screw pump are integrated, the advantages of no moving part, flexible and easy regulation of working system and suitability for sucking complex media of a highly-inclined well of the jet pump are utilized, the advantages of the two pumps are combined, the respective disadvantages are avoided, the problems of high failure rate, high management difficulty and higher investment of a relay lifting system of the two-stage jet pump are solved, particularly, the common special plunger pump for ground power liquid is avoided, the noise is greatly reduced, the occupied space of ground extraction equipment is saved, the operation reliability is remarkably improved, and the method is more applicable to the deep highly-inclined well, the horizontal well, the highly-inclined sand-containing and gas-containing complex working condition wells with more complex pumped media are more suitable for the operation of the deep highly-inclined wells;
2. the invention reduces the maintenance workload of the system, saves the treatment capacity of lifting the produced liquid to the ground, shortens the circulating path of the power liquid in the well, is beneficial to saving energy and improving efficiency, simplifies maintenance management, and has the characteristics of strong capability of adapting to the well condition and pumped medium, high efficiency, blocking resistance, wear resistance, convenient operation and maintenance, easy regulation and control management and low failure rate; the method can be used for deep extraction liquid of an oil well, sand production wells of thick oil, high-freezing oil wells, wells with limited ground space, low noise and offshore platform occasions, and is more suitable for occasions of coal bed gas, shale gas drainage and production and other different well conditions and drainage and production mediums;
3. according to the invention, the power fluid is subtracted from the produced fluid for oil extraction by the existing jet pump to obtain the produced fluid data, so that the direct ground metering of the produced fluid is changed, and the generated metering error is avoided, thereby the produced fluid metering is easier and more accurate.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic diagram of the structure of a reverse circulation jet pump;
FIG. 4 is a schematic diagram of a positive-cycle jet pump;
in the upper graph: the well head liquid outlet valve 2, the sleeve gate 3, the sleeve 4, the oil pipe 5, the connecting rod 6, the upper liquid flow circulation hole 7, the reflux cover 8, the screw pump rotor 9, the lower liquid flow circulation hole 10, the anchor 11, the small oil pipe 12, the jet pump 13, the fixed valve 14, the screen pipe 15, the plug 16, the screw pump 17 and the large four-way valve 18;
the reverse circulation jet pump body 13.1, the throat 13.2, the nozzle 13.3, the stratum fluid channel 13.4, the lower joint 13.5, the power fluid inlet 13.6, the diffusion cavity 13.7, the mixing cavity 13.8, the upper joint 13.9, the pump lifting leather cup 13.10, the pump core assembly 13.11, the pump barrel 13.12, the mixed fluid second outlet 13.13, the uniflow valve 13.14, the stratum fluid inlet 13.15, the salvaging head 13.16 and the mixed fluid first outlet 13.17.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment 1, referring to fig. 1, of the invention relates to a screw pump driving high-lift jet flow drainage device, which comprises a large four-way 18 arranged at a wellhead, wherein a driving head 1 is arranged at the upper part of the large four-way 18, and the device further comprises a wellhead liquid outlet valve 2, a sleeve gate 3, a connecting rod 6, an upper liquid flow circulation hole 7, a reflux cover 8, a screw pump rotor 9, a lower liquid flow circulation hole 10, an anchor 11, a jet pump 13, a fixed valve 14, a screen pipe 15, a plug 16 and a screw pump 17, wherein the wellhead liquid outlet valve 2 and the sleeve gate 3 are arranged on the large four-way 18, the wellhead liquid outlet valve 2 is communicated with the upper end of an oil pipe 5, and the sleeve gate 3 is communicated with the upper end of a sleeve 4; the screw pump 17 is connected to the inner cavity of the underground sleeve 4 through the oil pipe 5, the reflux hood 8 is installed on the outer side of the screw pump 17, an upper liquid flow circulation hole 7 is formed in the upper portion of the reflux hood 8, a lower liquid flow circulation hole 10 is formed in the lower portion of the reflux hood 8, a screw pump rotor 9 is arranged in the inner cavity of the screw pump 17, the upper end of the screw pump rotor 9 is connected with the output end of the driving head 1 through the connecting rod 6, the anchor 11 and the jet pump 13 are connected below the screw pump 17 through the oil pipe 5, the anchor 11 is anchored with the inner wall of the sleeve 4, the jet pump 13 is connected with the screw pump 17 in series, the jet pump 13 is located below the screw pump 17 for a distance, the lower portion of the jet pump 13 is connected with the fixed valve 14, and the lower portion of the fixed valve 14 is connected with the sieve tube 15 and the plug 16.
Wherein, a small oil pipe 12 is installed in the oil pipe 5 below the screw pump 17, the upper end of the small oil pipe 12 is connected to the lower end of the screw pump 17, and the lower end of the small oil pipe 12 is connected to the upper end of the jet pump 13.
It should be noted that: the driving head 1 and the screw pump 17 are conventional technologies well known to those skilled in the art, wherein a motor, a coupling, a screw pump rotor 9 and the like adopted by the driving head 1 are all of a common solid structure, the operation is reliable, the operation and the maintenance are convenient, matched equipment and components are easy to purchase and exchange, and the device is suitable for lifting well conditions of no wax precipitation, difficult blockage, no need of frequent well flushing and good pumping medium in a production pipe column; in addition, the driving device of the screw pump 17 may also adopt a direct-drive structure, and the driving device is also within the scope of the invention.
In the jet pump 13 of the present embodiment, a reverse circulation jet pump is adopted, and when the reverse circulation jet pump 13 is adopted, the screw pump 17 connected to the upper end is installed in a forward direction, so that the liquid flow is lifted upwards.
In addition, the driving pressure difference of the jet pump 13 of the reverse circulation is derived from the differential pressure formed by potential energy of the lifting liquid column of the screw pump 17, the set displacement of the screw pump 17 and the jet pump 13 is realized according to the designed drainage volume of the well by regulating and controlling the rotating speed of the screw pump 17, the displacement of the jet pump 13 is controlled by the internal diameter and the power hydraulic pressure of the nozzle 13.3, and the distance and the depth between the screw pump 17 and the jet pump 13 are set according to the lifting lift requirement of the deep well.
Referring to fig. 3, the jet pump 13 of the invention comprises a reverse circulation jet pump body 13.1, a throat pipe 13.2, a nozzle 13.3, a stratum fluid channel 13.4, a lower joint 13.5, a power fluid inlet 13.6, a diffusion cavity 13.7, a mixing cavity 13.8 and an upper joint 13.9, wherein the nozzle 13.3 is arranged in the inner cavity of the reverse circulation jet pump body 13.1, the throat pipe 13.2 is arranged above the nozzle 13.3, the upper part of the throat pipe 13.2 is communicated with the diffusion cavity 13.7, the lower end of the nozzle 13.3 is communicated with the power fluid inlet 13.6, the stratum fluid channel 13.4 is formed by the outer wall of the nozzle 13.3 and the inner wall of the reverse circulation jet pump body 13.1, and a cavity formed between the nozzle 13.3 and the throat pipe 13.2 is the mixing cavity 13.8; the lower end of the reverse circulation jet pump body 13.1 is provided with a lower joint 13.5, and the upper end of the diffusion cavity 13.7 is connected with an upper joint 13.9.
The application method of the screw pump driven high-lift jet drainage device comprises the following steps:
firstly, a tool string connected with a reverse circulation jet pump 13, a fixed valve 14, a screen pipe 15 and a plug 16 is lowered to the lower part of a well along a sleeve 4 in the well through an oil pipe 5, then a small oil pipe 12 is connected to the top end of the reverse circulation jet pump 13, the upper end of the small oil pipe 12 is connected to the lower end of a screw pump 17 which is installed in the forward direction, so that a power fluid channel in the jet pump 13 and the screw pump 17 is connected, the outer wall of the top end of the jet pump 13 is connected with the oil pipe 5, and then the tool string is fixed on the inner wall of the sleeve 4 through an anchor 11; then, the screw pump 17 which is covered with the reflux hood 8 and is installed in the forward direction and the matched oil pipe 5 are put into the underground design depth, the anchor 11 and the wellhead device are firmly seated, then the connecting rod 6 connected with the screw pump rotor 9 is put into the inner cavity of the stator of the screw pump 17, and then the upper end of the connecting rod 6 is connected with the output end of the driving head 1; finally, the wellhead device and the driving head 1 are allocated and connected with a power supply and control circuit of the driving head 1;
then, the driving head 1 installed on the large four-way valve 18 is started, the driving head 1 drives the connecting rod 6 to rotate, and then drives the screw pump rotor 9 in the screw pump 17 to rotate, under the upward suction effect of the screw pump 17, water in the oil pipe 5 enters the backflow hood 8 along the upper liquid flow circulation hole 7 after being pressurized by the screw pump 17, then is sprayed downwards along the lower liquid flow circulation hole 10, is sprayed downwards along the annular space formed between the small oil pipe 12 and the oil pipe 5, is sent to the reverse circulation jet pump 13 below as power liquid, enters the nozzle 13.3 along one or more power liquid inlets 13.6 to be sprayed out, under the negative pressure effect, drives the stratum liquid to be mixed with the power liquid upwards along the stratum liquid channel 13.4, is sent into the small oil pipe 12 upwards along the diffusion cavity 13.7, is further pressurized and is discharged upwards by the screw pump 17 above, part of the mixed liquid is sent to the ground along the oil pipe 5, is discharged through the wellhead liquid outlet valve 2, and the other part of the mixed liquid enters the backflow hood 8 through the upper liquid flow circulation hole 7, is sent to the lower liquid circulation hole 10 as the continuous liquid to the ground, and the continuous liquid is lifted to the continuous liquid with the ground under the condition of the continuous liquid, thereby the continuous liquid is lifted to the continuous liquid flowing from the bottom hole 13 to the ground.
Alternatively, casing gas may be directed up the annulus between the casing 4 and the tubing 5, up through the anchor 11, and out through the casing gate 3.
Embodiment 2, refer to fig. 2, the invention refers to a screw pump driving high-lift jet flow drainage device, which comprises a large four-way 18 installed at a wellhead, a driving head 1 installed at the upper part of the large four-way 18, wherein the device also comprises a wellhead liquid outlet valve 2, a sleeve gate 3, a connecting rod 6, an upper liquid flow circulation hole 7, a reflux cover 8, a screw pump rotor 9, a lower liquid flow circulation hole 10, an anchor 11, a jet pump 13, a fixed valve 14, a screen pipe 15, a plug 16 and a screw pump 17, wherein the wellhead liquid outlet valve 2 and the sleeve gate 3 are installed on the large four-way 18, the wellhead liquid outlet valve 2 is communicated with the upper end of an oil pipe 5, and the sleeve gate 3 is communicated with the upper end of a sleeve 4; the screw pump 17 is connected to the inner cavity of the underground sleeve 4 through the oil pipe 5, the reflux hood 8 is installed on the outer side of the screw pump 17, an upper liquid flow circulation hole 7 is formed in the upper portion of the reflux hood 8, a lower liquid flow circulation hole 10 is formed in the lower portion of the reflux hood 8, a screw pump rotor 9 is arranged in the inner cavity of the screw pump 17, the upper end of the screw pump rotor 9 is connected with the output end of the driving head 1 through the connecting rod 6, the anchor 11 and the jet pump 13 are connected below the screw pump 17 through the oil pipe 5, the anchor 11 is anchored with the inner wall of the sleeve 4, the jet pump 13 is connected with the screw pump 17 in series, the jet pump 13 is located below the screw pump 17 for a distance, the lower portion of the jet pump 13 is connected with the fixed valve 14, and the lower portion of the fixed valve 14 is connected with the sieve tube 15 and the plug 16.
The difference from example 1 is that:
the jet pump 13 adopts a positive circulation jet pump; when the positive circulation jet pump 13 is adopted, the screw pump 17 connected with the upper end is inversely installed, and the liquid flow is pressurized downwards, and the following needs to be described: the screw pump 17 is inversely installed, so that the pressure of the power fluid entering the positive circulation jet pump 13 is improved, the lifting lift and lifting efficiency of the system are further improved, cavitation of a high-water-content gas well is avoided, the pump efficiency is reduced, the working condition of the screw pump 17 is improved, and the screw pump is more suitable for deep well oil extraction with medium water content and low water content.
Referring to fig. 4, the positive circulation jet pump 13 comprises a throat pipe 13.2, a nozzle 13.3, a power fluid inlet 13.6, an upper joint 13.9, a pump core assembly 13.11, a pump barrel 13.12, a mixed fluid second outlet 13.13, a single flow valve 13.14, a stratum fluid inlet pump port 13.15, a salvage head 13.16 and a mixed fluid first outlet 13.17, wherein the pump core assembly 13.11 is arranged in an inner cavity of the pump barrel 13.12, the upper end of the pump barrel 13.12 is connected with a small oil pipe 12, the mixed fluid second outlet 13.13 is arranged at the lower side of the pump barrel 13.12, a mixed fluid discharge channel is formed between the inner wall of the oil pipe 5 and the outer wall of the pump barrel 13.12, and the outer wall of the lower end of the pump barrel 13.12 is connected with the oil pipe 5; the top of pump core assembly 13.11 installs salvage head 13.16, and salvage head 13.16's downside is equipped with more than one power fluid import 13.6, pump core assembly 13.11's inner chamber is equipped with nozzle 13.3, and nozzle 13.3's below is equipped with throat 13.2, and throat 13.2's downside is equipped with diffusion chamber 13.7, and diffusion chamber 13.7's downside is equipped with mixed liquor first export 13.17, pump core assembly 13.11's lower extreme be equipped with uniflow valve 13.14, pump barrel 13.12's lower extreme is equipped with stratum liquid pump inlet 13.15.
Wherein, the lower side of the power fluid inlet 13.6 is provided with a pump starting leather cup 13.10, and the pump starting leather cup 13.10 is positioned between the pump cylinder 13.12 and the pump core assembly 13.11.
In addition, a stratum fluid channel 13.4 is arranged at the middle lower part of the pump core assembly 13.11, the lower end of the stratum fluid channel 13.4 is communicated with the upper end of the uniflow valve 13.14, and the upper part of the stratum fluid channel 13.4 is communicated with the upper end of the throat pipe 13.2, so that power fluid and stratum fluid flow along the throat pipe 13.2 to a diffusion cavity 13.7 at the lower part after being mixed; the first mixed liquid outlet 13.17 is communicated with the second mixed liquid outlet 13.13, and the mixed liquid is discharged upwards along an annulus formed between the second mixed liquid outlet 13.13, the pump cylinder 13.12 and the oil pipe 5.
The application method of the screw pump driven high-lift jet drainage device comprises the following steps:
firstly, a tool string connected with a positive circulation jet pump 13, a fixed valve 14, a screen pipe 15 and a plug 16 is lowered into the lower part of a well along a sleeve 4 in the deep well through an oil pipe 5, then a small oil pipe 12 is connected to the top end of the positive circulation jet pump 13, the outer wall of the small oil pipe is connected with the oil pipe 5, and the small oil pipe is fixed on the inner wall of the sleeve 4 through an anchor 11; the upper end of the small oil pipe 12 is connected with the lower end of the screw pump 17 which is inversely installed, the screw pump 17 which is inversely installed and covered with the reflux hood 8 is put into a downhole design position, the lower end of the connecting rod 6 is connected with the screw pump rotor 9, and the upper end of the connecting rod 6 is connected with the output end of the driving head 1;
then, the driving head 1 installed on the large four-way valve 18 is started, the driving head 1 drives the connecting rod 6 to rotate, and then drives the screw pump rotor 9 in the screw pump 17 to rotate, under the downward pressurizing action of the screw pump 17, water in the oil pipe 5 is sprayed downwards along the small oil pipe 12 after being pressurized by the screw pump 17, and is sent to the jet pump 13 in the positive circulation below as power fluid, and enters the nozzle 13.3 along more than one power fluid inlet 13.6 to spray out, under the negative pressure action, stratum fluid is driven to be mixed with the power fluid upwards along the stratum fluid channel 13.4, and is sent downwards along the diffusion cavity 13.7 to the annulus of the pump core assembly 13.11 and the pump cylinder 13.12, and is upwards discharged along the annulus formed between the pump cylinder 13.12 and the oil pipe 5, and then enters the annulus formed between the oil pipe 5 and the small oil pipe 12 to be upwards discharged through the lower fluid circulating hole 10, and is discharged to the upper fluid circulating hole 7 through the upper fluid circulating hole 17, and the mixed fluid is continuously discharged to the surface of the well bore 5 along the pump 5, and the mixed fluid is continuously discharged to the well mouth of the well bore hole is continuously along the positive pressure pump, and the mixed fluid is continuously discharged to the well bore hole is continuously to the surface of the ground through the pump hole 17, and the mixed fluid is continuously discharged to the continuous fluid is discharged to the well hole is continuously along the well hole is continuously to the continuous to the ground.
Alternatively, casing gas may be directed up the annulus between the casing 4 and the tubing 5, up through the anchor 11, and out through the casing gate 3.
The embodiment 3 of the invention relates to a screw pump driving high-lift jet flow drainage device, which comprises a large four-way valve 18 arranged at a wellhead, wherein a driving head 1 is arranged at the upper part of the large four-way valve 18, and the device further comprises a wellhead liquid outlet valve 2, a sleeve gate 3, a connecting rod 6, an upper liquid circulation hole 7, a reflux cover 8, a screw pump rotor 9, a lower liquid circulation hole 10, an anchor 11, a jet pump 13, a fixed valve 14, a sieve tube 15, a plug 16 and a screw pump 17, wherein the wellhead liquid outlet valve 2 and the sleeve gate 3 are arranged on the large four-way valve 18, the wellhead liquid outlet valve 2 is communicated with the upper end of an oil pipe 5, and the sleeve gate 3 is communicated with the upper end of a sleeve 4; the screw pump 17 is connected to the inner cavity of the underground sleeve 4 through the oil pipe 5, the reflux hood 8 is installed on the outer side of the screw pump 17, an upper liquid flow circulation hole 7 is formed in the upper portion of the reflux hood 8, a lower liquid flow circulation hole 10 is formed in the lower portion of the reflux hood 8, a screw pump rotor 9 is arranged in the inner cavity of the screw pump 17, the upper end of the screw pump rotor 9 is connected with the output end of the driving head 1 through the connecting rod 6, the anchor 11 and the jet pump 13 are connected below the screw pump 17 through the oil pipe 5, the anchor 11 is anchored with the inner wall of the sleeve 4, the jet pump 13 is connected with the screw pump 17 in series, the jet pump 13 is located below the screw pump 17 for a distance, the lower portion of the jet pump 13 is connected with the fixed valve 14, and the lower portion of the fixed valve 14 is connected with the sieve tube 15 and the plug 16.
The difference from example 1 or 2 is that:
the hollow shaft motor, the coupling, the connecting rod 6 and the screw pump rotor 9 adopted by the driving head 1 of the screw pump 17 in the embodiment can also adopt a full hollow structure (as shown in fig. 3), and hollow vertical pipelines formed by the hollow shaft, the hollow coupling, the hollow connecting rod 6 and the hollow screw pump rotor 9 of the motor connected according to the same axis form a circulating well-flushing anti-blocking and underground test cable and an instrument casting and fishing channel, so that the inner circulating well-flushing anti-blocking and underground test signal transmission of the upper oil pipe 5 of the screw pump 17 can be conveniently realized.
The above description is only a few preferred embodiments of the present invention, and any person skilled in the art may make modifications to the above described embodiments or make modifications to the same. Accordingly, the corresponding simple modifications or equivalent changes according to the technical scheme of the present invention fall within the scope of the claimed invention.
Claims (9)
1. The utility model provides a screw pump drive high-lift efflux drainage device, includes big cross (18) of well head installation, installs driving head (1), characterized by in big cross (18) upper portion: the well mouth liquid outlet valve is characterized by further comprising a well mouth liquid outlet valve (2), a sleeve gate (3), a connecting rod (6), an upper liquid flow circulation hole (7), a backflow cover (8), a screw pump rotor (9), a lower liquid flow circulation hole (10), an anchor (11), a jet pump (13), a fixed valve (14), a sieve tube (15), a plug (16) and a screw pump (17), wherein the well mouth liquid outlet valve (2) and the sleeve gate (3) are arranged on the large four-way valve (18), the well mouth liquid outlet valve (2) is communicated with the upper end of an oil pipe (5), and the sleeve gate (3) is communicated with the upper end of a sleeve (4); the screw pump (17) is connected to an inner cavity of a casing (4) under the well through an oil pipe (5), a backflow cover (8) is installed on the outer side of the screw pump (17), an upper liquid flow circulation hole (7) is formed in the upper portion of the backflow cover (8), a lower liquid flow circulation hole (10) is formed in the lower portion of the backflow cover (8), a screw pump rotor (9) is arranged in the inner cavity of the screw pump (17), the upper end of the screw pump rotor (9) is connected with the output end of a driving head (1) through a connecting rod (6), an anchor (11) and a jet pump (13) are connected below the screw pump (17) through the oil pipe (5), the anchor (11) is anchored with the inner wall of the casing (4) through the jet pump (13) and the screw pump (17) in series, the jet pump (13) is located below the screw pump (17) for a distance, a fixed valve (14) is connected below the jet pump (13), and a screen pipe (15) and a plug (16) are connected below the fixed valve (14).
2. The screw pump driven high lift jet extraction apparatus of claim 1, wherein: a small oil pipe (12) is arranged in the oil pipe (5) below the screw pump (17), the upper end of the small oil pipe (12) is connected to the lower end of the screw pump (17), and the lower end of the small oil pipe (12) is connected to the upper end of the jet pump (13).
3. The screw pump driven high lift jet extraction apparatus of claim 2, wherein: the jet pump (13) adopts a reverse circulation jet pump or a positive circulation jet pump; when a jet pump with reverse circulation is adopted, a screw pump (17) connected with the upper end is installed in a forward direction, and liquid flow is lifted upwards; when a positive circulation jet pump is adopted, a screw pump (17) connected with the upper end is inversely installed and pressurizes liquid flow downwards.
4. A screw pump driven high lift jet extraction apparatus as defined in claim 3, wherein: the jet pump (13) of the reverse circulation comprises a jet pump body (13.1) of the reverse circulation, a throat pipe (13.2), a nozzle (13.3), a stratum fluid channel (13.4), a lower joint (13.5), a power fluid inlet (13.6), a diffusion cavity (13.7), a mixing cavity (13.8) and an upper joint (13.9), wherein the nozzle (13.3) is arranged in an inner cavity of the jet pump body (13.1) of the reverse circulation, the throat pipe (13.2) is arranged above the nozzle (13.3), the upper part of the throat pipe (13.2) is communicated with the diffusion cavity (13.7), the lower end of the nozzle (13.3) is communicated with the power fluid inlet (13.6), the stratum fluid channel (13.4) is formed between the outer wall of the nozzle (13.3) and the inner wall of the jet pump body (13.1), and a cavity formed between the nozzle (13.3) and the throat pipe (13.2) is the mixing cavity (13.8); the lower end of the reverse circulation jet pump body (13.1) is provided with a lower joint (13.5), and the upper end of the diffusion cavity (13.7) is connected with an upper joint (13.9).
5. A screw pump driven high lift jet extraction apparatus as defined in claim 3, wherein: the positive circulation jet pump (13) comprises a throat (13.2), a nozzle (13.3), a power fluid inlet (13.6), an upper joint (13.9), a pump core assembly (13.11), a pump barrel (13.12), a mixed fluid second outlet (13.13), a single flow valve (13.14), a stratum fluid inlet (13.15), a salvage head (13.16) and a mixed fluid first outlet (13.17), wherein the pump core assembly (13.11) is arranged in an inner cavity of the pump barrel (13.12), the upper end of the pump barrel (13.12) is connected with a small oil pipe (12), the mixed fluid second outlet (13.13) is arranged at the lower side of the pump barrel (13.12), a mixed fluid outer discharge channel is formed between the inner wall of the oil pipe (5) and the outer wall of the pump barrel (13.12), and the outer wall of the lower end of the pump barrel (13.12) is connected with the oil pipe (5); the utility model discloses a well-pumping device, including pump core assembly (13.11), fishing head (13.16) are installed at the top, and the downside of fishing head (13.16) is equipped with more than one power fluid import (13.6), the inner chamber of pump core assembly (13.11) is equipped with nozzle (13.3), and the below of nozzle (13.3) is equipped with throat (13.2), and the downside of throat (13.2) is equipped with diffusion chamber (13.7), and the downside of diffusion chamber (13.7) is equipped with mixed solution first export (13.17), the lower extreme of pump core assembly (13.11) be equipped with uniflow valve (13.14), the lower extreme of pump cylinder (13.12) is equipped with stratum liquid inlet pump (13.15).
6. The screw pump driven high lift jet extraction apparatus of claim 5, wherein: the lower side of the power fluid inlet (13.6) is provided with a pump starting leather cup (13.10), and the pump starting leather cup (13.10) is positioned between the pump cylinder (13.12) and the pump core assembly (13.11).
7. The screw pump driven high lift jet extraction apparatus of claim 6, wherein: the middle lower part of the pump core assembly (13.11) is provided with a stratum fluid channel (13.4), the lower end of the stratum fluid channel (13.4) is communicated with the upper end of the uniflow valve (13.14), and the upper part of the stratum fluid channel (13.4) is communicated with the upper end of the throat pipe (13.2) so that power fluid and stratum fluid flow along the throat pipe (13.2) to a diffusion cavity (13.7) at the lower part after being mixed; the mixed liquid first outlet (13.17) is communicated with the mixed liquid second outlet (13.13), and the mixed liquid enters the annular space formed between the pump barrel (13.12) and the oil pipe (5) along the mixed liquid second outlet (13.13) to be discharged upwards.
8. The method for using the screw pump driven high-lift jet drainage device according to claim 4, which is characterized by comprising the following steps:
firstly, a tool string connected with a jet pump (13), a fixed valve (14), a screen pipe (15) and a plug (16) which are reversely circulated is lowered to the lower part of a well along a sleeve (4) in a deep well through an oil pipe (5), then a small oil pipe (12) is connected to the top end of the jet pump (13) which is reversely circulated, the upper end of the small oil pipe (12) is connected to the lower end of a screw pump (17) which is positively arranged, so that the jet pump (13) is connected with a power liquid channel in the screw pump (17), the outer wall of the top end of the jet pump (13) is connected with the oil pipe (5), and then the tool string is fixed on the inner wall of the sleeve (4) through an anchor (11); then, the forward-mounted screw pump (17) covered with the reflux cover (8) and the matched oil pipe (5) are put into the underground design depth, the anchor (11) and the wellhead device are firmly seated, then the connecting rod (6) connected with the screw pump rotor (9) is put into the inner cavity of the stator of the screw pump (17), and then the upper end of the connecting rod (6) is connected with the output end of the driving head (1); finally, a wellhead device and a driving head (1) are allocated and connected with a power supply and control circuit of the driving head (1);
then, a driving head (1) arranged on the large four-way valve (18) is started, the driving head (1) drives a connecting rod (6) to rotate, and then drives a screw pump rotor (9) in a screw pump (17) to rotate, under the upward suction effect of the screw pump (17), water in an oil pipe (5) is pressurized by the screw pump (17), enters a reflux cover (8) along an upper liquid flow circulating hole (7), is sprayed downwards along a lower liquid flow circulating hole (10), is sprayed downwards along an annulus formed between a small oil pipe (12) and an oil pipe (5), is conveyed to a jet pump (13) of a reverse circulation below to serve as a power liquid, is conveyed to enter a nozzle (13.3) along more than one power liquid inlet (13.6), is driven to be mixed with the power liquid upwards along a stratum liquid channel (13.4) under the negative pressure effect, is conveyed upwards into the small oil pipe (12) along a diffusion cavity (13.7), is further discharged upwards by the upper screw pump (17) along the lower liquid flow circulating hole (10), part of the mixed liquid is conveyed to the underground liquid flow circulating hole (7) along the lower liquid circulating hole (7) as a continuous liquid flowing hole (10), the mixed liquid is discharged from the pump (5) to the bottom of the stratum, the mixed liquid is conveyed to the underground hole (2) along the underground hole (7) continuously, thereby achieving the effective pumping and lifting of complex well conditions and liquid production containing solid phase particles.
9. The method for using the screw pump driven high-lift jet drainage device as claimed in claim 7, which is characterized by comprising the following steps:
firstly, a tool string connected with a positive circulation jet pump (13), a fixed valve (14), a screen pipe (15) and a plug (16) is lowered to the lower part of a well along a sleeve (4) in a deep well through an oil pipe (5), then a small oil pipe (12) is connected to the top end of the positive circulation jet pump (13), the outer wall of the small oil pipe is connected with the oil pipe (5), and the small oil pipe is fixed on the inner wall of the sleeve (4) through an anchor (11); the upper end of the small oil pipe (12) is connected with the lower end of an inversely installed screw pump (17), the inversely installed screw pump (17) covered with a backflow cover (8) is put into a downhole design position, the lower end of the connecting rod (6) is connected with a screw pump rotor (9), and the upper end of the connecting rod (6) is connected with the output end of the driving head (1);
then, a driving head (1) arranged on the large four-way valve (18) is started, the driving head (1) drives a connecting rod (6) to rotate, and then drives a screw pump rotor (9) in a screw pump (17) to rotate, after the water in an oil pipe (5) is pressurized by the screw pump (17) under the downward pressurizing action of the screw pump (17), the water is downwards sprayed along a small oil pipe (12) and is sent to a jet pump (13) of positive circulation below as power fluid, and enters a nozzle (13.3) along more than one power fluid inlet (13.6) to be sprayed out, under the negative pressure action, formation fluid is driven to be upwards mixed with the power fluid along a formation fluid channel (13.4), and downwards sent into the annulus of a pump core assembly (13.11) and a pump cylinder (13.12) along a diffusion cavity (13.7), and a mixed fluid second outlet (13.13) arranged on the pump cylinder (13.12) enters an upward formed between the pump cylinder (13.12) and the oil pipe (5), enters the upward fluid outlet (5) and then enters the annulus (5) and is discharged through the small oil pipe (5) and enters a fluid outlet (5) and is circulated to a fluid outlet (5) through the upper circulation valve (8) and is formed in the fluid outlet part of the annulus (5) and is discharged through the fluid outlet (5) and the annulus (5) and is circulated through the upper part of the fluid outlet valve (8), the other part of the mixed liquid is continuously pressurized downwards along the screw pump (17) and then is continuously used as the power liquid of the jet pump (13) which is in positive circulation, so that stratum liquid is continuously lifted to the ground from the bottom of the well, and the effective suction and lifting of complex well conditions and liquid production containing solid phase particles are achieved.
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| CN118008217B (en) * | 2024-04-08 | 2024-06-11 | 山东成林石油工程技术有限公司 | Three-stage serial pump deep pumping and drainage device and use method |
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| RU2018138435A3 (en) * | 2018-10-30 | 2020-04-30 | ||
| CN111350487A (en) * | 2020-05-07 | 2020-06-30 | 东北石油大学 | Jet pump-double screw pump same-well injection-production combined lifting system and method |
| CN114809995A (en) * | 2021-07-30 | 2022-07-29 | 东北石油大学 | Underground natural gas hydrate exploitation device and method |
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| CN108049845A (en) * | 2018-02-02 | 2018-05-18 | 西南石油大学 | A kind of non-diagenesis gas hydrates lifting method of sea-bottom shallow and device |
| RU2018138435A3 (en) * | 2018-10-30 | 2020-04-30 | ||
| CN111350487A (en) * | 2020-05-07 | 2020-06-30 | 东北石油大学 | Jet pump-double screw pump same-well injection-production combined lifting system and method |
| CN114809995A (en) * | 2021-07-30 | 2022-07-29 | 东北石油大学 | Underground natural gas hydrate exploitation device and method |
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