CN115680577A - Underground concentric pipe hydraulic lifting pump - Google Patents
Underground concentric pipe hydraulic lifting pump Download PDFInfo
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- CN115680577A CN115680577A CN202211386798.9A CN202211386798A CN115680577A CN 115680577 A CN115680577 A CN 115680577A CN 202211386798 A CN202211386798 A CN 202211386798A CN 115680577 A CN115680577 A CN 115680577A
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Abstract
The invention discloses an underground concentric tube hydraulic lifting pump which comprises a supercharging mechanism, a connecting mechanism and a drainage mechanism. The pressurizing mechanism consists of a pressurizing nozzle, a pressurizing joint and the like; the connecting mechanism consists of a backflow joint, a reducing joint and the like; the drainage mechanism consists of a drainage sprayer, a jet pipe and the like. The inner pipe, the outer pipe and the flow channel conversion joint at the top end of the pressurizing mechanism are respectively connected with the pipe column joint, and the pressurizing mechanism is connected with the drainage mechanism through a connecting mechanism. The invention adopts a multiple negative pressure absorption and jet flow lifting structure, and realizes suction and lifting of returned liquid to different degrees by controlling the flow of power liquid; the annular return liquid migration speed and the mobility are improved, the rock debris deposition in the pipeline is reduced, the phenomena of pump blockage and pipeline blockage are effectively prevented, and therefore the production operation efficiency and the safety are improved. The invention is suitable for the drainage-assisting operation such as reverse circulation pressure-control drilling, high-sand-content oil extraction, natural gas hydrate drilling and the like, and has the characteristics of simple structure, energy saving, consumption reduction and high reliability.
Description
Technical Field
The invention belongs to the field of energy exploitation equipment, and particularly relates to an underground concentric tube hydraulic lifting pump.
Background
In recent years, as social production and life have more and more demands on resources such as oil, natural gas and the like, the exploitation depth of the oil and natural gas resources is continuously increased, the annular pressure of the underground part of a land is increased along with the depth, and a narrow density window exists in shallow surface layer drilling in the development of deep water oil gas and hydrate, so that the stratum is soft and easy to leak, the pressure in a shaft needs to be accurately regulated and controlled in the drilling process, otherwise, the shaft wall is easy to be unstable, well leakage accidents occur, and the drilling efficiency is influenced; at present, methods for preparing drilling fluid, using gas, inflating, foaming and the like to control the pressure of a wellbore fluid column are commonly adopted, but the methods have high difficulty in implementation, have matched process requirements and have poor applicability; an annular turbine suction pump that current patent CN 101725543A proposed rotates through the inside turbine of drilling fluid drive, drives the turbine pump blade in outside and rotates, realizes the lifting to drilling fluid, but the turbine blade exposes outside for the instrument can not be used for most complicated well sections, has very big restrictive.
Horizontal and extended reach wells are currently in wide use in the field of oil, gas, shale gas and gas hydrate production. However, in the daily drilling process, if the mixed slurry cannot be well transferred, the flow rate of the return liquid in the annulus is increased, and the rock debris or the sand is accumulated to form a rock debris bed or sediment, so that the efficiency and the safety of the drilling and completion operation process are greatly influenced. The current patent CN 112482986A provides a hydraulic lifting tool in pit, and the drilling fluid that flows in the drilling rod drives the rotation of turbine power unit, drives screw axial compressor mechanism rotor rotation through turbine center pin and universal coupling mechanism, realizes lifting and the migration of horizontal segment annular space detritus to the annular space drilling fluid, but its structure is complicated, and is inefficient, and the life-span is low, easily takes place card pump and pipe blockage phenomenon.
Meanwhile, by investigating various pumps which can be used for underground lifting, after analysis, the existing pumps cannot meet the drainage-assisting operations such as reverse circulation pressure-control drilling, high-sand-content oil extraction, natural gas hydrate drilling and extraction and the like, and the existing pumps have the following defects in the application process, and the defects are mainly shown as follows:
(1) The existing jet lifting tool also has the problems of poor efficiency, low pump pressure and small lift, and directly influences the production efficiency and the productivity.
(2) In the existing production process, electric power driven pumps such as a disc pump, a multistage centrifugal pump and a plunger pump are used, the lifting pumps need to be independently lowered to the sea bottom or attached to a lifting pipe column and need to be connected through cables, and the process is complex and the workload is large.
(3) Current turbine formula water conservancy lifting tool structure is complicated, because mixed liquid sand content often is higher in the production process, consequently very easily appears card pump and pipe blockage phenomenon, will consume a large amount of manpower and materials and carry out the shutdown maintenance, causes great economic loss.
Therefore, in order to meet the requirements of a concentric drill rod reverse circulation pressure control drilling process, a concentric double-pipe sand discharge oil extraction process, a double-layer pipe natural gas hydrate drilling process and the like and simultaneously solve the defects of the existing underground lifting pump, the invention needs to invent a novel underground concentric pipe hydraulic lifting pump, improve the migration speed and the mobility of annular return liquid, reduce rock debris deposition in a pipeline, and effectively prevent the phenomena of pump blockage and pipeline blockage, thereby improving the production operation efficiency and the safety.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects of the prior art and provide a downhole concentric tube hydraulic lifting pump. The invention adopts a multi-stage jet flow lifting mode combining the drainage mechanism and the pressurization mechanism, solves the problem of low production efficiency and improves the production operation efficiency; the tool can be directly connected to a production pipe column and is lowered along with the pipe column for drilling, so that the problems of complex arrangement process and large workload of the traditional production lifting pump are solved; the invention adopts the principle of negative pressure absorption, and no moving component is arranged in the underground pipe column, thereby solving the problem of easy pump blockage and pipeline blockage, reducing the shutdown maintenance loss, and improving the service life and reliability.
(II) technical scheme
The purpose of the invention is realized by the following technical scheme: a downhole concentric tube hydraulic lift pump, comprising: the device consists of a supercharging mechanism, a connecting mechanism and a drainage mechanism; the supercharging mechanism comprises an outer pipe A1, an inner pipe B2, a supercharging connector 3, an upper drainage connector 4, a supercharging spray nozzle 5, a supercharging spray nozzle stop block 6, a supercharging spray nozzle connecting block 7, a drainage pipe 8, an inner pipe C9 and an outer pipe D10, wherein the bottom end of the outer pipe A1 is in threaded connection with the top end of the outer pipe D10, the bottom end of the inner pipe B2 is in threaded connection with the top end of the supercharging connector 3, the upper drainage connector 4 is provided with a boss II 401, a boss III 402, a boss IV 403, a boss V404, a backflow hole I405, a backflow hole I406 and a backflow hole II 407, the bottom end of the supercharging connector 3 is in threaded connection with the boss II 401 of the upper drainage connector 4, the boss III 402 of the upper drainage connector 4 is in threaded connection with the boss I1-1 of the outer pipe A1, the supercharging spray nozzle 5 is in threaded connection with the supercharging spray nozzle connecting block 7, the supercharging spray nozzle stop block 6 is in threaded connection with the boss IV 403 of the upper drainage pipe 4, and the top end of the drainage pipe 8 and the top end of the inner pipe C9 are in threaded connection with the boss 403 and the boss 404V 403 of the boss 404 of the upper drainage connector 4 respectively; the connecting mechanism consists of an upper flow distribution plate 11, a backflow joint 12 and a reducer union 13, wherein the backflow joint 12 is provided with a boss VI 1201, a boss VII 1202, a groove I1203, a boss VIII 1204, a groove II 1205, a backflow hole III 1206, a backflow hole IV 1207 and an overflowing hole II 1208; drainage mechanism is by outer tube E14, inner tube F15, jet pipe 16, jet pipe gasket 17, drainage connector 18 down, drainage shower nozzle 19, drainage shower nozzle dog 20, drainage shower nozzle connecting block 21, inner tube G22, outer tube H23, lower diversion plate 24 and runner crossover sub 25 constitute, inner tube F15 top and 13 bottom ends of reducing adapter pass through threaded connection, drainage connector 18 down is provided with boss IX 1801, boss XII 1802, boss XI 1803, boss XII 1804, suction hole 1805, backflow hole V1806 and through flow hole III 1807, runner crossover sub 25 is provided with boss i 2501, boss II 2502, boss iii 2503 and through IV flow hole 2504, outer tube E14 bottom, inner tube F15 bottom, outer tube H23 top, inner tube G22 top is respectively through boss IX 1801 of screw thread and drainage connector 18, XI 1802, boss XI 1803, boss XII 1803, boss 16 is connected, jet pipe 16 is fixed inside inner tube F15, be provided with drainage pipe 16 between jet pipe 18 and lower diversion connector 18, outer tube G22 top passes through screw thread and drainage connector 18 boss IX 1801, drain pipe gasket 17, drain pipe 104 is connected through drainage shower nozzle 20 and drain connector 19, boss 2503, drain connector 21 bottom end of flow connector pass through drainage shower nozzle branch connection boss 1804 respectively, drain connector 19 and drain connector boss 2503 boss.
The underground concentric pipe hydraulic lifting pump is characterized in that: the inside of the pressurizing joint 3 is provided with a throat pipe channel 3-1, the bottom end of the throat pipe channel 3-1 is provided with a mixing pipe for momentum exchange between power liquid and returned liquid, and the top end of the throat pipe channel 3-1 is provided with a diffusion pipe which plays a role in decelerating and pressurizing the returned liquid.
The underground concentric pipe hydraulic lifting pump is characterized in that: two sides of the upper splitter plate 11 and two sides of the lower splitter plate 24 are respectively provided with a cylindrical spacer layer I11-1 and a cylindrical spacer layer II 24-1, and the power liquid is distributed; the middle part is respectively provided with a conical diversion column I11-2 and a conical diversion column II 24-2 which are respectively used for power fluid to enter the drainage tube 8 and the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: and a baffle is arranged in the inner pipe F15 and used for limiting the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole I405 and an overflowing hole I406 which are uniformly distributed in the circumferential direction are formed in the outer side of the upper drainage joint 4 and are used for flowing back liquid and power liquid respectively; the middle part is provided with a backflow hole II 407 with a throat pipe channel for sucking the backflow liquid of the backflow hole I405.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole IV 1207 and a flow passing hole II 1208 which are uniformly distributed in the circumferential direction are formed in the outer side of the backflow joint 12 and are used for flowing of backflow liquid and power liquid respectively; the middle of the jet pipe is provided with a backflow hole III 1206 for the circulation of the backflow liquid after passing through the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflowing holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; the middle of the inner tube is provided with a backflow hole V1806 for the circulation of power fluid passing through the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: the flow channel conversion joint 25 is provided with key groove type overflowing holes IV 2504 which are uniformly distributed in the circumferential direction and used for enabling power liquid to flow to a bottom pipe column.
A pumping and lifting method of a downhole concentric tube hydraulic lifting pump is characterized by comprising the following steps: when the production operation is carried out, the working procedures can be divided into a ground pumping process, a power liquid injection process, a power liquid downward moving process, a mixed slurry pumping process, a returned liquid pressurizing process and a returned liquid lifting process, and the steps are as follows:
s1, a ground pumping process: the tool is connected into the underground device combination, the flow of the power liquid is controlled by a frequency conversion control cabinet on the ground through controlling the rotating speed of a ground pump, the yield of the mixed slurry can be adjusted, and the power liquid is pressurized by the ground pump and then reaches an annulus between an outer pipe A1 and an inner pipe B2 through a pipe column;
s2, a power liquid injection process: after high-pressure power liquid enters an annulus between the drainage tube 8 and the inner tube C9 through the overflow hole I406 from the annulus between the outer tube A1 and the inner tube B2, the high-pressure power liquid passes through the upper flow distribution plate 11, the upper flow distribution plate 11 has a flow distribution effect on the power liquid, one part of the power liquid enters the drainage tube 8, the other part of the power liquid enters the annulus between the outer tube E14 and the inner tube F15 through the overflow hole II 1208, and then enters the annulus between the inner tube G22 and the outer tube H23 through the overflow hole III 1807;
s3, a power liquid downward moving process: high-pressure power fluid passes through a lower flow distribution plate 24 from an annular space between the inner pipe G22 and the outer pipe H23, the lower flow distribution plate 24 distributes the power fluid, and a part of the power fluid enters the lower pipe column through the overflowing hole IV 2504;
s4, pumping the mixed slurry: the other part of the high-pressure power fluid which is split by the lower splitter plate 24 enters the inner tube G22, negative pressure is generated at the nozzle of the drainage spray head 19, the mixed slurry is sucked into the jet pipe 16 through the suction hole 1805, the power fluid and the mixed slurry are mixed to form a returned fluid, the returned fluid is subjected to deceleration and pressurization and then enters the inner tube F15, and then the returned fluid sequentially passes through the reducer union 13 and the return hole IV 1207 and then enters the annulus between the inner tube C9 and the outer tube D10;
s5, a returned liquid pressurization process: a part of high-pressure power liquid which is split by the upper splitter plate 11 enters the drainage tube 8, negative pressure is generated at the nozzle of the pressurizing nozzle 5, annular returned liquid between the inner tube C9 and the outer tube D10 is pumped into the pressurizing connector 3 through the backflow hole I405, and the returned liquid and the power liquid are mixed together at the pressurizing connector 3, decelerated and pressurized and then enter the inner tube B2;
s6, a return liquid lifting process: under the double negative pressure absorption effect of the pressurization mechanism and the drainage mechanism, returned liquid enters the upper pipe column through the inner pipe B2, is transported to the ground through the pipe column, is subjected to desanding, oil-gas-liquid separation and purification, and is circulated and reciprocated, so that high-efficiency production operation is realized.
(III) advantageous effects
The invention has the beneficial effects that: (1) By adopting a multiple negative pressure absorption and jet flow lifting structure, the lifting speed of the returned liquid is high, and the production operation efficiency is high; (2) The drilling tool can be directly connected to a production pipe column and is placed down along with the pipe column for drilling, the arrangement process is simple, and the workload is small; (3) The annular return liquid has high fluidity, the rock debris deposition in the pipeline is low, and no moving component is arranged in the pipeline, so that the phenomena of pump blockage and pipeline blockage are effectively prevented; (4) The pumping and lifting return liquid in different degrees can be realized by controlling the flow of the power liquid, the underground pressure is finely regulated, and the safety is high; (5) The method has wide application range and is suitable for drainage-assisting operations such as reverse circulation pressure control drilling, high sand content oil extraction, natural gas hydrate drilling and the like.
Drawings
FIG. 1 is a schematic sectional front view of the present invention;
FIG. 2 is a schematic sectional view of the power fluid injection device of the present invention;
FIG. 3 is a schematic three-dimensional sectional view of the pressurizing mechanism of the present invention;
FIG. 4 is a schematic three-dimensional sectional view of the drainage mechanism of the present invention;
FIG. 5 is a schematic view of an upper drainage connector structure according to the present invention;
FIG. 6 is a schematic cross-sectional view of a return coupling according to the present invention;
FIG. 7 is a schematic cross-sectional view of a lower drainage connector according to the present invention;
FIG. 8 is a schematic view of a flow channel adapter structure according to the present invention;
1. an outer tube A; 2. an inner tube B; 3. a pressure boost joint; 4. an upper drainage joint; 5. a pressurizing nozzle; 6. a pressurized spray head stop block; 7. a pressurizing nozzle connecting block; 8. a drainage tube; 9. an inner tube C; 10. an outer tube D; 11. an upper spreader plate; 12. a return joint; 13. a reducer union; 14. an outer tube E; 15. an inner tube F; 16. a jet pipe; 17. a jet pipe gasket; 18. a lower drainage joint; 19. a drainage spray head; 20. a drainage spray head stop block; 21. a drainage spray head connecting block; 22. an inner tube G; 23. an outer tube H; 24. a lower splitter plate; 25. a flow channel conversion joint; 1-1, boss I; 3-1, a throat channel; 11-1, a cylindrical spacer layer I; 11-2, a conical diversion column I; 24-1, a cylindrical separation layer II; 24-2, a conical diversion column II; 401. a boss II; 402. a boss III; 403. a boss IV; 404. a boss V; 405. a backflow hole I; 406. an overflowing hole I; 407. a backflow hole II; 1201. a boss VI; 1202. a boss VII; 1203. a groove I; 1204. a boss VIII; 1205. a groove II; 1206. a backflow hole III; 1207. a backflow hole IV; 1208. an overflowing hole II; 1801. a boss IX; 1802. a boss X; 1803. a boss XI; 1804. a boss XII; 1805. a suction hole; 1806. a backflow hole V; 1807. an overflowing hole III; 2501. a boss i; 2502. a boss ii; 2503. III, boss; 2504. and an overflowing hole IV.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships described based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
The embodiment of the invention discloses a downhole concentric tube hydraulic lifting pump which is used for a straight well section.
As shown in the figure, the underground concentric tube hydraulic lifting pump consists of a pressure boosting mechanism, a connecting mechanism and a drainage mechanism; the supercharging mechanism comprises an outer pipe A1, an inner pipe B2, a supercharging connector 3, an upper drainage connector 4, a supercharging spray nozzle 5, a supercharging spray nozzle stop block 6, a supercharging spray nozzle connecting block 7, a drainage pipe 8, an inner pipe C9 and an outer pipe D10, wherein the bottom end of the outer pipe A1 is in threaded connection with the top end of the outer pipe D10, the bottom end of the inner pipe B2 is in threaded connection with the top end of the supercharging connector 3, the upper drainage connector 4 is provided with a boss II 401, a boss III 402, a boss IV 403, a boss V404, a backflow hole I405, a backflow hole I406 and a backflow hole II 407, the bottom end of the supercharging connector 3 is in threaded connection with the boss II 401 of the upper drainage connector 4, the boss III 402 of the upper drainage connector 4 is in threaded connection with the boss I1-1 of the outer pipe A1, the supercharging spray nozzle 5 is in threaded connection with the supercharging spray nozzle connecting block 7, the supercharging spray nozzle stop block 6 is in threaded connection with the boss IV 403 of the upper drainage pipe 4, and the top end of the drainage pipe 8 and the top end of the inner pipe C9 are in threaded connection with the boss 403 and the boss 404V 403 of the boss 404 of the upper drainage connector 4 respectively; the connecting mechanism consists of an upper flow distribution plate 11, a backflow joint 12 and a reducer union 13, wherein the backflow joint 12 is provided with a boss VI 1201, a boss VII 1202, a groove I1203, a boss VIII 1204, a groove II 1205, a backflow hole III 1206, a backflow hole IV 1207 and an overflowing hole II 1208; the drainage mechanism is by outer tube E14, inner tube F15, jet pipe 16, jet pipe gasket 17, drainage joint 18 down, drainage shower nozzle 19, drainage shower nozzle dog 20, drainage shower nozzle connecting block 21, inner tube G22, outer tube H23, lower flow distribution plate 24 and runner transform joint 25 constitute, inner tube F15 top passes through threaded connection with reducer union 13 bottom, drainage joint 18 down is provided with boss IX 1801, boss 1802, boss XI 1803, boss XII 1804, suction hole 1805, backward flow hole V1806 and discharge hole III 1807, runner transform joint 25 is provided with boss i 2501, boss ii 2502, boss iii 2503 and discharge hole IV 2504, outer tube E14 bottom, inner tube F15 bottom, boss XI 1801, XI 1802, boss XI 1803, boss XII of inner tube G22 top through screw thread and drainage joint 18 boss IX 1801, XII 1802, XI 1802, boss XI 1803, boss XII is connected, jet pipe 16 is fixed inside inner tube F15, be provided with drainage joint 18 between jet pipe 16 and drainage joint 18, the top of jet pipe passes through drainage pipe tap washer 17, drainage pipe gasket 21 and drainage shower nozzle insert 21, drainage shower nozzle and drain joint 20, drain joint 21 and drain joint 19 pass through thread connection of guide pipe, boss 1804 respectively, the boss 2503, the boss 2501 of drainage shower nozzle is connected with boss 2501, boss.
The underground concentric pipe hydraulic lifting pump is characterized in that: the inside of the pressurizing joint 3 is provided with a throat pipe channel 3-1, the bottom end of the throat pipe channel 3-1 is provided with a mixing pipe for momentum exchange between power liquid and returned liquid, and the top end of the throat pipe channel 3-1 is provided with a diffusion pipe which plays a role in decelerating and pressurizing the returned liquid and is used for pressurizing the returned liquid.
The underground concentric pipe hydraulic lifting pump is characterized in that: two sides of the upper splitter plate 11 and two sides of the lower splitter plate 24 are respectively provided with a cylindrical spacer layer I11-1 and a cylindrical spacer layer II 24-1 which both have a splitting effect on the power fluid; the middle parts of the two conical diversion columns are respectively provided with a conical diversion column I11-2 and a conical diversion column II 24-2 which are respectively used for the power liquid to enter the drainage tube 8 and the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: and a baffle is arranged in the inner tube F15 and used for limiting the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole I405 and an overflowing hole I406 which are uniformly distributed in the circumferential direction are formed in the outer side of the upper drainage joint 4 and are used for flowing back liquid and power liquid respectively; the middle part is provided with a backflow hole II 407 with a choke passage for sucking the backflow liquid of the backflow hole I405.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole IV 1207 and a flow passing hole II 1208 which are uniformly distributed in the circumferential direction are formed in the outer side of the backflow joint 12 and are used for flowing of backflow liquid and power liquid respectively; the middle part is provided with a backflow hole III 1206 for the circulation of the backflow liquid after passing through the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflowing holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; the middle of the inner tube is provided with a backflow hole V1806 for the circulation of power fluid passing through the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: the flow channel conversion joint 25 is provided with key groove type overflowing holes IV 2504 which are uniformly distributed in the circumferential direction and used for enabling power liquid to flow to a bottom pipe column.
The working process of the invention is as follows: when the tool is used for concentric drill rod reverse circulation pressure control drilling and concentric double-pipe sand discharge oil extraction, the tool is connected into a downhole device combination of a drilling and completion system, a frequency conversion control cabinet on the ground controls the flow of power fluid by controlling the rotation speed of a surface pump, the yield of mixed slurry can be adjusted, the power fluid is pressurized by the surface pump and then reaches the annulus between an outer pipe A1 and an inner pipe B2 through a tubular column, high-pressure power fluid enters the annulus between a drainage pipe 8 and an inner pipe C9 through an overflowing hole I406 from the annulus between the outer pipe A1 and the inner pipe B2, then passes through an upper flow distribution plate 11, the upper flow distribution plate 11 has the function of distributing the power fluid, one part of the power fluid enters the drainage pipe 8, negative pressure is generated at a nozzle of a pressurizing spray head 5, the other part of the power fluid enters the annulus between an outer pipe E14 and an inner pipe F15 through an overflowing hole II, then enters the annulus between an inner pipe G22 and an outer pipe H23 through an overflowing hole III 1807, and then passes through a lower flow distribution plate 24, the lower flow distribution plate 24 distributes power liquid, one part of the power liquid enters the lower part pipe column through the overflowing hole IV 2504, the other part of the power liquid enters the inner pipe G22, negative pressure is generated at the nozzle of the drainage spray nozzle 19, the mixed slurry is sucked into the jet pipe 16 through the suction hole 1805, the power liquid and the mixed slurry are mixed to form returned liquid, the returned liquid is subjected to deceleration and pressurization and then enters the inner pipe F15, the returned liquid sequentially passes through the reducing joint 13 and the backflow hole IV 1207 and then enters the annular space between the inner pipe C9 and the outer pipe D10, the returned liquid enters the backflow hole I405 and is sucked by the pressurization spray nozzle 5, the power liquid and the returned liquid are mixed together at the pressurization joint 3 and subjected to deceleration and pressurization and then enter the inner pipe B2, the returned liquid enters the upper part pipe column and is transported to the ground through the pipe column to perform sand removal, oil-gas-liquid separation and purification, under the double negative pressure absorption action of the pressurization mechanism and the drainage mechanism, the strong suction and the rapid lifting of the mixed slurry are realized, meanwhile, the pumping and lifting speed of the mixed slurry can be controlled by controlling the flow of the pumped power liquid, so that the fine control of the environmental pressure is realized.
Example two
The embodiment of the invention relates to a downhole concentric tube hydraulic lifting pump which is used for a horizontal segment.
As shown in the figure, the underground concentric tube hydraulic lifting pump consists of a pressure boosting mechanism, a connecting mechanism and a drainage mechanism; the supercharging mechanism comprises an outer pipe A1, an inner pipe B2, a supercharging connector 3, an upper drainage connector 4, a supercharging spray nozzle 5, a supercharging spray nozzle stop block 6, a supercharging spray nozzle connecting block 7, a drainage pipe 8, an inner pipe C9 and an outer pipe D10, wherein the bottom end of the outer pipe A1 is connected with the top end of the outer pipe D10 through threads, the bottom end of the inner pipe B2 is connected with the top end of the supercharging connector 3 through threads, the upper drainage connector 4 is provided with a boss II 401, a boss III 402, a boss IV 403, a boss V404, a backflow hole I405, a backflow hole I406 and a backflow hole II 407, the bottom end of the supercharging connector 3 is connected with the boss II 401 of the upper drainage connector 4 through threads, the boss III 402 of the upper drainage connector 4 is connected with the boss I1-1 of the outer pipe A1 through threads, the supercharging spray nozzle 5 is connected with the supercharging spray nozzle connecting block 7 through threads, the supercharging spray nozzle stop block 6 is connected with the supercharging spray nozzle connecting block 7 through threads and the boss IV 403 of the upper drainage pipe 4 through threads, and the top end of the drainage pipe 8 and the top end of the inner pipe C9 are respectively connected with the boss 403 and the boss 404 of the upper drainage connector 4 through threads; the connecting mechanism consists of an upper flow distribution plate 11, a backflow joint 12 and a reducer union 13, wherein the backflow joint 12 is provided with a boss VI 1201, a boss VII 1202, a groove I1203, a boss VIII 1204, a groove II 1205, a backflow hole III 1206, a backflow hole IV 1207 and an overflowing hole II 1208; the drainage mechanism is by outer tube E14, inner tube F15, jet pipe 16, jet pipe gasket 17, drainage joint 18 down, drainage shower nozzle 19, drainage shower nozzle dog 20, drainage shower nozzle connecting block 21, inner tube G22, outer tube H23, lower flow distribution plate 24 and runner transform joint 25 constitute, inner tube F15 top passes through threaded connection with reducer union 13 bottom, drainage joint 18 down is provided with boss IX 1801, boss 1802, boss XI 1803, boss XII 1804, suction hole 1805, backward flow hole V1806 and discharge hole III 1807, runner transform joint 25 is provided with boss i 2501, boss ii 2502, boss iii 2503 and discharge hole IV 2504, outer tube E14 bottom, inner tube F15 bottom, boss XI 1801, XI 1802, boss XI 1803, boss XII of inner tube G22 top through screw thread and drainage joint 18 boss IX 1801, XII 1802, XI 1802, boss XI 1803, boss XII is connected, jet pipe 16 is fixed inside inner tube F15, be provided with drainage joint 18 between jet pipe 16 and drainage joint 18, the top of jet pipe passes through drainage pipe tap washer 17, drainage pipe gasket 21 and drainage shower nozzle insert 21, drainage shower nozzle and drain joint 20, drain joint 21 and drain joint 19 pass through thread connection of guide pipe, boss 1804 respectively, the boss 2503, the boss 2501 of drainage shower nozzle is connected with boss 2501, boss.
The underground concentric pipe hydraulic lifting pump is characterized in that: the inside of the pressurizing joint 3 is provided with a throat pipe channel 3-1, the bottom end of the throat pipe channel 3-1 is provided with a mixing pipe for momentum exchange between power liquid and returned liquid, and the top end of the throat pipe channel 3-1 is provided with a diffusion pipe which plays a role in decelerating and pressurizing the returned liquid and is used for pressurizing the returned liquid.
The underground concentric pipe hydraulic lifting pump is characterized in that: two sides of the upper splitter plate 11 and two sides of the lower splitter plate 24 are respectively provided with a cylindrical spacer layer I11-1 and a cylindrical spacer layer II 24-1 which both have the effect of splitting power fluid; the middle part is respectively provided with a conical diversion column I11-2 and a conical diversion column II 24-2 which are respectively used for power fluid to enter the drainage tube 8 and the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: and a baffle is arranged in the inner tube F15 and used for limiting the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole I405 and an overflowing hole I406 which are uniformly distributed in the circumferential direction are formed in the outer side of the upper drainage joint 4 and are used for flowing back liquid and power liquid respectively; the middle part is provided with a backflow hole II 407 with a throat pipe channel for sucking the backflow liquid of the backflow hole I405.
The underground concentric pipe hydraulic lifting pump is characterized in that: a backflow hole IV 1207 and a flow passing hole II 1208 which are uniformly distributed in the circumferential direction are formed in the outer side of the backflow joint 12 and are used for flowing of backflow liquid and power liquid respectively; the middle part is provided with a backflow hole III 1206 for the circulation of the backflow liquid after passing through the jet pipe 16.
The underground concentric pipe hydraulic lifting pump is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflowing holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; the middle of the inner tube is provided with a backflow hole V1806 for the circulation of power fluid passing through the inner tube G22.
The underground concentric pipe hydraulic lifting pump is characterized in that: the flow channel conversion joint 25 is provided with key groove type overflowing holes IV 2504 which are uniformly distributed in the circumferential direction and used for enabling power liquid to flow to a bottom pipe column.
The working process of the invention is as follows: when the device is used for drilling and producing double-layer pipe natural gas hydrates, a single tool or a plurality of tools are simultaneously connected into the underground device combination of the horizontal well section, the frequency conversion control cabinet on the ground controls the flow rate of the power fluid by controlling the rotating speed of the surface pump, the output of the mixed slurry can be adjusted, the power fluid reaches the annular space between the outer pipe A1 and the inner pipe B2 through the pipe column after being pressurized by a surface pump, the high-pressure power fluid enters the annular space between the drainage pipe 8 and the inner pipe C9 through the overflowing hole I406 from the annular space between the outer pipe A1 and the inner pipe B2, passes through the upper flow distribution plate 11, the upper flow distribution plate 11 has the function of distributing the power fluid, and a part of the power fluid enters the drainage pipe 8, negative pressure is generated at the nozzle of the pressurizing nozzle 5, another part of the power fluid enters the annular space between the outer pipe E14 and the inner pipe F15 through the overflowing hole II 1208, then enters the annulus between the inner pipe G22 and the outer pipe H23 through the overflowing hole III 1807, passes through the lower flow distribution plate 24, the lower flow distribution plate 24 distributes power fluid, one part of the power fluid enters the lower pipe column through the overflowing hole IV 2504, the other part of the power fluid enters the inner pipe G22, negative pressure is generated at the nozzle of the drainage spray head 19, the mixed slurry is sucked into the jet pipe 16 through the suction hole 1805, the power liquid and the mixed slurry are mixed to form return liquid, the return liquid is subjected to speed reduction and pressure increase and then enters the inner pipe F15, then the return liquid passes through the reducer union 13 and the return hole IV 1207 in turn and enters the annular space between the inner pipe C9 and the outer pipe D10, enters the return hole I405 to be sucked by the pressurizing nozzle 5, the power liquid and the return liquid are mixed together at the pressurizing joint 3 and enter the inner pipe B2 after being decelerated and pressurized, the return liquid enters the upper pipe column and is transported to the mining platform at the sea level through the pipe column to be deeply processed, under the double negative pressure absorption effect of the pressurization mechanism and the drainage mechanism, the high-efficiency exploitation of the mixed slurry is realized.
It is to be understood that the above-described embodiments are illustrative only and not restrictive of the broad invention, and that various other modifications and changes in light thereof will be suggested to persons skilled in the art based upon the above teachings. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (8)
1. A downhole concentric tube hydraulic lifting pump is characterized by comprising a pressurization mechanism, a connecting mechanism and a drainage mechanism; wherein, the booster mechanism is by outer tube A (1), inner tube B (2), pressure boost joint (3), go up drainage connector (4), pressure boost shower nozzle (5), pressure boost shower nozzle dog (6), pressure boost shower nozzle connecting block (7), drainage tube (8), inner tube C (9) and outer tube D (10) are constituteed, outer tube A (1) bottom passes through threaded connection with outer tube D (10) top, inner tube B (2) bottom passes through threaded connection with pressure boost joint (3) top, it is provided with boss II (401) to go up drainage connector (4), boss III (402), boss IV (403), boss V (404), backward flow hole I (405), overflow hole I (406) and backward flow hole II (407), pressure boost joint (3) bottom passes through threaded connection with boss II (401) of last drainage connector (4), the boss III (402) of going up drainage connector (4) pass through the screw thread and be connected with boss I (1-1) of outer tube A (1), pressure boost shower nozzle (5) pass through screw thread and pressure boost shower nozzle connecting block (7) connecting block (6) and pressure boost shower nozzle dog (7) top and drainage tube (IV) top and drainage tube (4) boss (403) respectively, the top of upper drainage tube (4) and drainage tube (403) and boss I (8) and boss (403) are connected with boss I (4) boss (7) top of boss (403), pressure boost joint (4) and inner tube (4) respectively, pressure boost joint (4) and drain joint (403) and boss I (4) and boss I (7) are connected, pressure boost joint (4) respectively, pressure boost joint (4) top and boss (403) and drain joint (7) are connected, pressure boost joint (4) and drain joint (403) top and V (403) are connected, pressure boost joint (4) respectively, pressure boost joint (4) top ) The connection is realized through screw threads; the connecting mechanism comprises an upper flow distribution plate (11), a backflow joint (12) and a reducing joint (13), wherein the backflow joint (12) is provided with a boss VI (1201), a boss VII (1202), a groove I (1203), a boss VIII (1204), a groove II (1205), a backflow hole III (1206), a backflow hole IV (1207) and a overflowing hole II (1208), the boss VI (1201), the boss VII (1202) and the boss VIII (1204) of the backflow joint (12) are respectively connected with the bottom end of an outer tube D (10), the bottom end of an inner tube C (9) and the top end of an outer tube E (14) through threads, and the upper flow distribution plate (11) and the reducing joint (13) are respectively connected with the groove I (1203) and the groove II (1205) of the backflow joint (12) through threads; the flow guiding mechanism consists of an outer pipe E (14), an inner pipe F (15), a jet pipe (16), a jet pipe gasket (17), a lower flow guiding joint (18), a flow guiding spray head (19), a flow guiding spray head block (20), a flow guiding spray head connecting block (21), an inner pipe G (22), an outer pipe H (23), a lower flow dividing plate (24) and a flow passage conversion joint (25), wherein the top end of the inner pipe F (15) is connected with the bottom end of the reducing joint (13) through threads, the lower flow guiding joint (18) is provided with a boss IX (1801), a boss X (1802), a boss XI (1803), a boss XII (1804), a suction hole (1805), a backflow hole V (1806) and an overflowing hole III (1807), the flow passage conversion joint (25) is provided with a boss Ii (2501), a boss X (2502), a boss iii (2503) and an overflowing hole (2504), the bottom end of the outer pipe E (14), the inner pipe F (15), the top end of the inner pipe H (23) and the top end of the inner pipe G (22) are respectively fixed between the flow guiding spray pipe E (1801) and the boss XI (1803) through threads and the inner pipe gasket (1802), the boss XIV (16), the boss (16) and the inner pipe F (16) and the inner pipe X (16), drainage shower nozzle (19) are connected with drainage shower nozzle connecting block (21) through the screw thread, and drainage shower nozzle dog (20) are connected through boss XII (1804) of screw thread and drainage joint (18) respectively with drainage shower nozzle connecting block (21), and outer tube H (23) bottom, lower flow distribution plate (24) are connected through boss i (2501), boss iii (2503) of screw thread and runner transform joint (25) respectively.
2. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: the inside of the pressurizing joint (3) is provided with a throat pipe channel (3-1), the bottom end of the throat pipe channel (3-1) is provided with a mixing pipe for momentum exchange between power liquid and returned liquid, and the top end of the throat pipe channel (3-1) is provided with a diffusion pipe which plays a role in reducing speed and pressurizing the returned liquid.
3. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: two sides of the upper splitter plate (11) and the lower splitter plate (24) are respectively provided with a cylindrical spacer layer I (11-1) and a cylindrical spacer layer II (24-1), and both the cylindrical spacer layers I and the cylindrical spacer layers II have a splitting effect on the power fluid; the middle part is respectively provided with a conical diversion column I (11-2) and a conical diversion column II (24-2) which are respectively used for the power liquid to enter the drainage tube (8) and the inner tube G (22).
4. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: a backflow hole I (405) and a flow passing hole I (406) which are uniformly distributed in the circumferential direction are formed in the outer side of the upper drainage joint (4) and are used for flowing back liquid and power liquid respectively; the middle of the suction pipe is provided with a backflow hole II (407) with a choke passage for sucking the backflow liquid of the backflow hole I (405).
5. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: backflow holes IV (1207) and overflowing holes II (1208) which are uniformly distributed in the circumferential direction are formed in the outer side of the backflow joint (12) and are used for flowing of backflow liquid and power liquid respectively; the middle of the jet pipe is provided with a backflow hole III (1206) for the backflow liquid flowing through the jet pipe (16).
6. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: suction holes (1805) and overflowing holes III (1807) which are uniformly distributed in the circumferential direction are formed in the outer side of the lower drainage joint (18) and are used for sucking mixed slurry and circulating power liquid respectively; the middle of the inner tube is provided with a backflow hole V (1806) for the circulation of power fluid after passing through the inner tube G (22).
7. A downhole concentric tube hydraulic lift pump according to claim 1, wherein: the flow channel conversion joint (25) is provided with a key groove type overflowing hole IV (2504) which is uniformly distributed in the circumferential direction and used for enabling power liquid to flow to a bottom pipe column.
8. A pumping and lifting method of a downhole concentric tube hydraulic lifting pump is characterized in that: when the production operation is carried out, the working procedures can be divided into a ground pumping process, a power liquid injection process, a power liquid downward moving process, a mixed slurry pumping process, a returned liquid pressurization process and a returned liquid lifting process, and the steps are as follows:
s1, a ground pumping process: the tool is connected into the underground device combination, the flow of the power fluid is controlled by a variable frequency control cabinet on the ground through controlling the rotating speed of a ground pump, the yield of the mixed slurry can be adjusted, and the power fluid is pressurized by the ground pump and then reaches an annulus between an outer pipe A (1) and an inner pipe B (2) through a pipe column;
s2, a power liquid injection process: high-pressure power liquid enters an annulus between a drainage tube (8) and an inner tube C (9) from the annulus between an outer tube A (1) and an inner tube B (2) through an overflowing hole I (406), then passes through an upper flow distribution plate (11), the upper flow distribution plate (11) has a flow distribution effect on the power liquid, one part of the power liquid enters the drainage tube (8), the other part of the power liquid enters the annulus between an outer tube E (14) and an inner tube F (15) through an overflowing hole II (1208), and then enters the annulus between an inner tube G (22) and an outer tube H (23) through an overflowing hole III (1807);
s3, a power liquid downward moving process: high-pressure power liquid passes through a lower flow distribution plate (24) from an annular space between the inner pipe G (22) and the outer pipe H (23), the lower flow distribution plate (24) distributes flow to the power liquid, and a part of the power liquid enters the lower pipe column through the overflowing hole IV (2504);
s4, pumping mixed slurry: the other part of high-pressure power liquid which is shunted by the lower shunting plate (24) enters the inner tube G (22), negative pressure is generated at the nozzle of the drainage spray head (19), the mixed slurry is sucked into the jet pipe (16) through the suction hole (1805), the power liquid and the mixed slurry are mixed to form a returned liquid, the returned liquid is subjected to speed reduction and pressure boost and then enters the inner tube F (15), and then the returned liquid sequentially passes through the reducer union (13) and the backflow hole IV (1207) and then enters an annulus between the inner tube C (9) and the outer tube D (10);
s5, a returned liquid pressurization process: a part of high-pressure power liquid which is shunted by the upper shunting plate (11) enters the drainage tube (8), negative pressure is generated at a nozzle of the pressurizing nozzle (5), an annular backflow liquid between the inner tube C (9) and the outer tube D (10) is sucked into the pressurizing joint (3) through the backflow hole I (405), and the backflow liquid and the power liquid are mixed together in the pressurizing joint (3), decelerated and pressurized and then enter the inner tube B (2);
s6, a return liquid lifting process: under the double negative pressure absorption effect of the pressurization mechanism and the drainage mechanism, returned liquid enters the upper pipe column through the inner pipe B (2), is transported to the ground through the pipe column, is subjected to desanding, oil-gas-liquid separation and purification, and is circulated and reciprocated, so that high-efficiency production operation is realized.
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