CN115680577B - Underground concentric tube hydraulic lifting pump - Google Patents
Underground concentric tube hydraulic lifting pump Download PDFInfo
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- CN115680577B CN115680577B CN202211386798.9A CN202211386798A CN115680577B CN 115680577 B CN115680577 B CN 115680577B CN 202211386798 A CN202211386798 A CN 202211386798A CN 115680577 B CN115680577 B CN 115680577B
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Abstract
The invention discloses an underground concentric tube hydraulic lifting pump which comprises a pressurizing 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 reflux joint, a reducing joint and the like; the drainage mechanism consists of a drainage spray head, a jet pipe and the like. The inner pipe, the outer pipe and the runner 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 the connecting mechanism. The invention adopts a multiple negative pressure absorption and jet lifting structure, and realizes pumping and lifting of returned liquid to different degrees by controlling the flow of power liquid; the annular return liquid migration speed and fluidity are improved, the rock debris deposition in the pipeline is reduced, and the phenomena of pump blocking and pipeline blocking are effectively prevented, so that the production operation efficiency and the safety are improved. The invention is suitable for the drainage-assisting operation of reverse circulation pressure-control drilling, oil extraction with high sand content, natural gas hydrate drilling and the like, and has the characteristics of simple structure, energy conservation, consumption reduction and high reliability.
Description
Technical Field
The invention belongs to the field of energy exploitation equipment, and particularly relates to a downhole concentric tube hydraulic lifting pump.
Background
In recent years, as the demand of social production and life on resources such as petroleum, natural gas and the like is increased, the exploitation depth of petroleum and natural gas resources is increased continuously, the annular pressure at the lower part of a land well is increased along with the depth, a narrow-density window exists in shallow surface drilling in deep water oil gas and hydrate development, the stratum is soft and easy to leak, the pressure in a shaft is required to be accurately regulated and controlled in the drilling process, otherwise, the well wall is easy to be unstable, lost circulation accidents occur, and the drilling efficiency is influenced; at present, methods for controlling the pressure of a shaft liquid column by configuring drilling fluid, using gas, inflating, foaming and the like are commonly adopted, but the methods have high deployment difficulty, have mutually matched process requirements and have poor applicability; according to the annular turbine suction pump provided by the prior patent CN 101725543A, the drilling fluid drives the internal turbine to rotate, and drives the turbine pump blades on the outer side to rotate, so that lifting of the drilling fluid is realized, but the turbine blades are exposed outside, so that the tool cannot be used for most complex well sections, and has great limitation.
Horizontal wells and large displacement wells are currently in wide use in the field of oil, gas, shale gas and gas hydrate recovery. However, the rock debris generated in the drilling process and a large amount of sand and stones brought by oil gas flow in the production process are easily deposited on the lower well walls of horizontal wells, high-inclination wells, large-displacement wells, wells with complex structures and the like under the action of gravity, and if mixed slurry migration cannot be well realized in the daily drilling process, the flow rate of annulus return liquid is increased, and the accumulation of the rock debris or sand and stones can form a rock debris bed or sand deposit, so that the efficiency and the safety of the drilling and completion operation process are greatly influenced. The prior patent CN 112482986A proposes a downhole hydraulic lifting tool, drilling fluid flowing in a drill rod drives a turbine power mechanism to rotate, a turbine central shaft and a universal coupling mechanism drive a screw axial flow mechanism rotor to rotate, lifting of annular drilling fluid and migration of annular rock debris at a horizontal section are realized, but the downhole hydraulic lifting tool is complex in structure, low in efficiency and long in service life, and pump clamping and pipeline blocking phenomena are easy to occur.
Meanwhile, by researching various pumps which can be used for underground lifting, the pump can not meet the discharge-assisting operation of reverse circulation pressure control drilling, high sand-containing oil extraction, natural gas hydrate drilling and the like after analysis, and the pump has the following defects in the application process, and is mainly characterized in that:
(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, electrically driven pumps such as a disc pump, a multistage centrifugal pump, a plunger pump and the like are used, the lifting pumps are required to be independently lowered on the sea floor or attached to a lifting pipe column and connected by cables, and the process is complex and the workload is high.
(3) The existing turbine hydraulic lifting tool is complex in structure, and because the sand content of mixed liquor is often higher in the production process, the phenomena of pump blockage and pipeline blockage are very easy to occur, a large amount of manpower and material resources are consumed for shutdown maintenance, and great economic loss is caused.
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 solve the defects of the existing underground lifting pump, a novel underground concentric pipe hydraulic lifting pump is required to be invented, the annulus return liquid migration speed and the annulus return liquid mobility are improved, the rock debris deposition in a pipeline is reduced, the phenomena of pump blocking and pipeline blocking are effectively prevented, and therefore the production operation efficiency and the safety are improved.
Disclosure of Invention
(one) solving the technical problems
The invention aims to overcome the defects of the prior art and provides a hydraulic lifting pump with underground concentric pipes. The invention adopts a multi-stage jet lifting mode combining the drainage mechanism and the pressurizing mechanism, solves the problem of low production efficiency, and improves the production operation efficiency; the tool can be directly connected to the production pipe column and is put down along with the pipe column to drill, so that the problems of complex arrangement process and large workload of the existing production lifting pump are solved; the invention adopts the principle of negative pressure absorption, does not have moving components in the underground pipe column, solves the problem that pump blocking and pipeline blocking are easy to occur, reduces the shutdown maintenance loss, and improves the service life and the reliability.
(II) technical scheme
The aim of the invention is realized by the following technical scheme: the utility model provides a concentric tube hydraulic lift pump in pit which characterized in that: the device consists of a pressurizing mechanism, a connecting mechanism and a drainage mechanism; the pressurizing mechanism consists of an outer pipe A1, an inner pipe B2, a pressurizing connector 3, an upper drainage connector 4, a pressurizing nozzle 5, a pressurizing nozzle stop block 6, a pressurizing nozzle connecting block 7, a drainage tube 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 pressurizing connector 3 through threads, the upper drainage connector 4 is provided with a boss II 401, a boss III, a boss IV 403, a boss V404, a backflow hole I405, a flow-through hole I406 and a backflow hole II 407, the bottom end of the pressurizing connector 3 is connected with the boss II 401 of the upper drainage connector 4 through threads, the boss III of the upper drainage connector 4 is connected with the boss I1-1 of the outer pipe A1 through threads, the pressurizing nozzle stop block 6 is connected with the pressurizing nozzle connecting block 7 through threads and the boss IV 403 of the upper drainage connector 4 respectively, and the top end of the drainage tube 8 and the top end of the inner pipe C9 are connected with the boss IV 403 and the boss V404 through threads respectively; the connecting mechanism consists of an upper flow dividing 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 Kong 1207 and a flow passing 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 pipe D10, the bottom end of an inner pipe C9 and the top end of an outer pipe E14 through threads, and the upper flow dividing plate 11 and the reducer union 13 are respectively connected with the groove I1203 and the groove II 1205 of the backflow joint 12 through threads; the drainage mechanism comprises an outer tube E14, an inner tube F15, a jet tube 16, a jet tube gasket 17, a lower drainage joint 18, a drainage nozzle 19, a drainage nozzle stop 20, a drainage nozzle connecting block 21, an inner tube G22, an outer tube H23, a lower flow dividing plate 24 and a flow passage changing joint 25, wherein the top end of the inner tube F15 is connected with the bottom end of the reducing joint 13 through threads, the lower drainage joint 18 is provided with a boss IX 1801, a boss X1802, a boss XI 1803, a boss XII 1804, a suction hole 1805, a reflux Kong 1806 and a flow passing hole III 1807, the flow passage changing joint 25 is provided with a boss i 2501, a boss ii 2502, a boss iii 2503 and a flow passing hole IV 2504, the bottom end of the outer tube E14, the bottom end of the inner tube F15, the top end of the outer tube H23 and the top end of the inner tube G22 are respectively connected with the boss IX 1801, the boss XI 1803 and the boss 1804 of the lower drainage joint 18 through threads, the jet tube 16 is fixed inside the inner tube F15, the jet tube X1803 is arranged between the jet tube 16 and the lower drainage joint 18, the drainage nozzle 19 is connected with the flow dividing plate 2502 through threads, the flow dividing plate 2503 and the flow passage 2503 is respectively connected with the bottom end of the outer tube F15 through threads and the flow dividing plate 2503 through the flow dividing joint 2502, the flow passage 2503 and the flow passage connecting block 2504 is respectively.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the supercharging joint 3 is internally provided with a throat channel 3-1, the bottom end of the throat 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 channel 3-1 is provided with a diffusion pipe for decelerating and supercharging the returned liquid.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the two sides of the upper splitter plate 11 and the lower splitter plate 24 are respectively provided with a column separation layer I11-1 and a column separation layer II 24-1, and the uniform power liquid plays a role in splitting; the middle is respectively provided with a conical flow guiding column I11-2 and a conical flow guiding column II 24-2 which are respectively used for the power fluid to enter the drainage tube 8 and the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: a baffle is arranged in the inner tube F15 and used for limiting the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the upper drainage joint 4 is provided with backflow holes I405 and overflow holes I406 which are uniformly distributed in the circumferential direction and are respectively used for flowing the returned liquid and the power liquid; the middle is provided with a backflow hole II 407 containing a throat channel for sucking the backflow liquid of the backflow hole I405.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outside of the reflux joint 12 is provided with reflux Kong 1207 and an overflow hole II 1208 which are uniformly distributed in the circumferential direction and are respectively used for circulating the reflux liquid and the power liquid; a return orifice iii 1206 is provided in the middle for the return flow after passing through the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflow holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; a backflow hole v 1806 is provided in the middle for flowing the power fluid through the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the runner conversion joint 25 is provided with key slot type overflow holes IV 2504 which are uniformly distributed in the circumferential direction and are used for enabling power fluid to flow to the bottom tubular column.
A pumping lifting method of a hydraulic lifting pump for underground concentric pipes is characterized by comprising the following steps of: when the production operation is carried out, the working procedures of the method are divided into a ground pumping process, a power liquid injection process, a power liquid downward moving process, a mixed slurry sucking 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 frequency conversion control cabinet on the ground controls the flow of the power fluid by controlling the rotating speed of the ground pump, the output of the mixed slurry can be regulated, and the power fluid reaches the annulus between the outer pipe A1 and the inner pipe B2 through the pipe column after being pressurized by the ground pump;
s2, a power fluid injection process: after the high-pressure power fluid enters the 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 power fluid is split by the upper splitter plate 11, one part of the power fluid enters the drainage tube 8, the other part of the power fluid 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 fluid downward moving process: the high-pressure power fluid passes through an annulus between the inner tube G22 and the outer tube H23 and passes through the lower flow dividing plate 24, the power fluid is divided by the lower flow dividing plate 24, and a part of the power fluid enters the lower tubular column through the flow passing hole IV 2504;
s4, a mixed slurry sucking process: the other part of high-pressure power fluid which is split by the lower splitter plate 24 enters the inner pipe G22, negative pressure is generated at the nozzle of the drainage nozzle 19, 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 return fluid, the return fluid is decelerated and pressurized and then enters the inner pipe F15, and then the return fluid sequentially passes through the reducer union 13 and the return hole IV 1207 and then enters an annulus between the inner pipe C9 and the outer pipe D10;
s5, a returning liquid pressurizing 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 booster nozzle 5, annulus return liquid between the inner tube C9 and the outer tube D10 is sucked into the booster joint 3 through the return hole I405, and the return liquid and the power liquid are mixed in the booster joint 3, decelerated and boosted and then enter the inner tube B2;
s6, lifting the returned liquid: under the double negative pressure absorption action of the pressurizing mechanism and the drainage mechanism, the returned liquid enters the upper pipe column through the inner pipe B2, reaches the ground through pipe column migration, and is subjected to sand removal, oil-gas-liquid separation and purification, and cyclic reciprocation, so that high-efficiency production operation is realized.
(III) beneficial effects
The beneficial effects of the invention are as follows: (1) The multiple negative pressure absorption and jet flow lifting structure is adopted, so that the lifting speed of returned liquid is high, and the production operation efficiency is high; (2) The device can be directly connected to a production pipe column and drill along with the pipe column, and has simple arrangement process and small workload; (3) The annulus return fluid has high fluidity, the rock debris in the pipeline is low in deposition, and no moving component is arranged in the annulus return fluid, so that the phenomena of pump blockage and pipeline blockage are effectively prevented; (4) The pumping and lifting of the returned liquid to different degrees are realized by controlling the flow of the power liquid, the underground pressure is finely regulated and controlled, and the safety is high; (5) The application range is wide, and the method is suitable for the discharge-assisting operation such as reverse circulation pressure-control drilling, oil extraction with high sand content, natural gas hydrate drilling and the like.
Drawings
FIG. 1 is a schematic view of a front cross-sectional structure of the present invention;
FIG. 2 is a schematic diagram of a cross-sectional front view of the present invention when power fluid is injected;
FIG. 3 is a schematic view of a three-dimensional cross-sectional structure of the supercharging mechanism of the present invention;
FIG. 4 is a schematic view of a three-dimensional cross-sectional structure of a drainage mechanism of the present invention;
FIG. 5 is a schematic view of the structure of the upper drainage connector of the present invention;
FIG. 6 is a schematic cross-sectional view of a return joint according to the present invention;
FIG. 7 is a schematic cross-sectional view of a lower drainage connector of the present invention;
FIG. 8 is a schematic view of a flow passage conversion joint according to the present invention;
1. an outer tube A; 2. an inner tube B; 3. a pressurizing joint; 4. an upper drainage joint; 5. pressurizing the spray head; 6. a pressurized spray head stop block; 7. a pressurized spray nozzle connecting block; 8. a drainage tube; 9. an inner tube C; 10. an outer tube D; 11. an upper diverter plate; 12. a return joint; 13. a reducing joint; 14. an outer tube E; 15. an inner tube F; 16. jet pipe; 17. jet pipe gasket; 18. a lower drainage joint; 19. a drainage nozzle; 20. a drainage nozzle stop block; 21. a drainage nozzle connecting block; 22. an inner tube G; 23. an outer tube H; 24. a lower diverter plate; 25. a runner conversion joint; 1-1, a boss I; 3-1, throat channel; 11-1, a cylindrical separator layer I; 11-2, a conical guide column I; 24-1, a columnar separation layer II; 24-2, a conical guide column II; 401. a boss II; 402. a boss III; 403. a boss IV; 404. a boss V; 405. a reflow hole I; 406. an overflow hole I; 407. a reflow hole II; 1201. a boss VI; 1202. a boss VII; 1203. a groove I; 1204. a boss VIII; 1205. a groove II; 1206. a reflow hole III; 1207. a reflow hole IV; 1208. an overflow hole II; 1801. boss IX; 1802. boss X; 1803. a boss XI; 1804. a boss XII; 1805. a suction hole; 1806. a reflow hole V; 1807. an overflow hole III; 2501. a boss i; 2502. a boss ii; 2503. boss iii; 2504. and an overflow hole IV.
Description of the embodiments
The following description of the embodiments of the present invention will be made apparent and fully understood from the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships described based on the drawings are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be 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," "second," and the like 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 explicitly specified and limited otherwise, 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; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Examples
The downhole concentric tube hydraulic lifting pump is used for a straight well section.
As shown in the figure, the hydraulic lifting pump for the underground concentric pipes consists of a pressurizing mechanism, a connecting mechanism and a drainage mechanism; the pressurizing mechanism consists of an outer pipe A1, an inner pipe B2, a pressurizing connector 3, an upper drainage connector 4, a pressurizing nozzle 5, a pressurizing nozzle stop block 6, a pressurizing nozzle connecting block 7, a drainage tube 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 pressurizing connector 3 through threads, the upper drainage connector 4 is provided with a boss II 401, a boss III, a boss IV 403, a boss V404, a backflow hole I405, a flow-through hole I406 and a backflow hole II 407, the bottom end of the pressurizing connector 3 is connected with the boss II 401 of the upper drainage connector 4 through threads, the boss III of the upper drainage connector 4 is connected with the boss I1-1 of the outer pipe A1 through threads, the pressurizing nozzle stop block 6 is connected with the pressurizing nozzle connecting block 7 through threads and the boss IV 403 of the upper drainage connector 4 respectively, and the top end of the drainage tube 8 and the top end of the inner pipe C9 are connected with the boss IV 403 and the boss V404 through threads respectively; the connecting mechanism consists of an upper flow dividing 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 Kong 1207 and a flow passing 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 pipe D10, the bottom end of an inner pipe C9 and the top end of an outer pipe E14 through threads, and the upper flow dividing plate 11 and the reducer union 13 are respectively connected with the groove I1203 and the groove II 1205 of the backflow joint 12 through threads; the drainage mechanism comprises an outer tube E14, an inner tube F15, a jet tube 16, a jet tube gasket 17, a lower drainage joint 18, a drainage nozzle 19, a drainage nozzle stop 20, a drainage nozzle connecting block 21, an inner tube G22, an outer tube H23, a lower flow dividing plate 24 and a flow passage changing joint 25, wherein the top end of the inner tube F15 is connected with the bottom end of the reducing joint 13 through threads, the lower drainage joint 18 is provided with a boss IX 1801, a boss X1802, a boss XI 1803, a boss XII 1804, a suction hole 1805, a reflux Kong 1806 and a flow passing hole III 1807, the flow passage changing joint 25 is provided with a boss i 2501, a boss ii 2502, a boss iii 2503 and a flow passing hole IV 2504, the bottom end of the outer tube E14, the bottom end of the inner tube F15, the top end of the outer tube H23 and the top end of the inner tube G22 are respectively connected with the boss IX 1801, the boss XI 1803 and the boss 1804 of the lower drainage joint 18 through threads, the jet tube 16 is fixed inside the inner tube F15, the jet tube X1803 is arranged between the jet tube 16 and the lower drainage joint 18, the drainage nozzle 19 is connected with the flow dividing plate 2502 through threads, the flow dividing plate 2503 and the flow passage 2503 is respectively connected with the bottom end of the outer tube F15 through threads and the flow dividing plate 2503 through the flow dividing joint 2502, the flow passage 2503 and the flow passage connecting block 2504 is respectively.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the pressurizing connector 3 is internally provided with a throat channel 3-1, the bottom end of the throat 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 channel 3-1 is provided with a diffusion pipe for decelerating and pressurizing the returned liquid.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the two sides of the upper flow dividing plate 11 and the lower flow dividing plate 24 are respectively provided with a cylindrical separation layer I11-1 and a cylindrical separation layer II 24-1, which have the function of dividing power fluid; the middle is respectively provided with a conical flow guiding column I11-2 and a conical flow guiding column II 24-2 which are respectively used for the power fluid to enter the drainage tube 8 and the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: a baffle is arranged in the inner tube F15 and used for limiting the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the upper drainage joint 4 is provided with backflow holes I405 and overflow holes I406 which are uniformly distributed in the circumferential direction and are respectively used for flowing the returned liquid and the power liquid; the middle is provided with a backflow hole II 407 containing a throat channel for sucking the backflow liquid of the backflow hole I405.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outside of the reflux joint 12 is provided with reflux Kong 1207 and an overflow hole II 1208 which are uniformly distributed in the circumferential direction and are respectively used for circulating the reflux liquid and the power liquid; a return orifice iii 1206 is provided in the middle for the return flow after passing through the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflow holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; a backflow hole v 1806 is provided in the middle for flowing the power fluid through the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the runner conversion joint 25 is provided with key slot type overflow holes IV 2504 which are uniformly distributed in the circumferential direction and are used for enabling power fluid to flow to the bottom tubular column.
The working process of the invention is as follows: when the device is used for concentric drill rod reverse circulation pressure control drilling and concentric double-pipe sand discharge oil extraction, a tool is connected into a downhole device combination of a drilling and completion system, the rotation speed of a ground pump is controlled, the flow rate of power fluid is controlled, the output of mixed slurry can be regulated by a frequency conversion control cabinet on the ground, after the power fluid is pressurized by the ground pump, the power fluid reaches an annulus between an outer pipe A1 and an inner pipe B2 through a pipe column, high-pressure power fluid enters the annulus between a drainage pipe 8 and an inner pipe C9 from the annulus between the outer pipe A1 and the inner pipe B2 through a flow-through hole I406, the power fluid is split by an upper splitter plate 11, one part of the power fluid enters the drainage pipe 8, negative pressure is generated at a nozzle of a pressurizing nozzle 5, the other part of the power fluid enters the annulus between an outer pipe E14 and an inner pipe F15 through a flow-through hole II 1208, then enters the annulus between an inner pipe G22 and an outer pipe H23 through a flow-through hole III 1807, the lower flow dividing plate 24 divides the power liquid, one part of the power liquid enters the lower pipe column through the flow passing 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 nozzle 19, 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 enters the inner pipe F15 after being decelerated and pressurized, then the returned liquid sequentially passes through the reducing joint 13 and the return hole IV 1207 and enters the annulus between the inner pipe C9 and the outer pipe D10, the returned liquid enters the return hole I405 and is sucked by the pressurizing nozzle 5, the power liquid and the returned liquid are mixed together at the pressurizing joint 3 and are decelerated and pressurized and enter the inner pipe B2, the returned liquid enters the upper pipe column, the pipe column is conveyed to the ground through the pipe column to remove sand, separate and purify the oil and the gas, the mixed slurry is forcefully sucked and quickly lifted under the double negative pressure absorption action of the pressurizing mechanism and the drainage mechanism, meanwhile, the pumping 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.
Examples
The downhole concentric tube hydraulic lifting pump is used for a horizontal section.
As shown in the figure, the hydraulic lifting pump for the underground concentric pipes consists of a pressurizing mechanism, a connecting mechanism and a drainage mechanism; the pressurizing mechanism consists of an outer pipe A1, an inner pipe B2, a pressurizing connector 3, an upper drainage connector 4, a pressurizing nozzle 5, a pressurizing nozzle stop block 6, a pressurizing nozzle connecting block 7, a drainage tube 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 pressurizing connector 3 through threads, the upper drainage connector 4 is provided with a boss II 401, a boss III, a boss IV 403, a boss V404, a backflow hole I405, a flow-through hole I406 and a backflow hole II 407, the bottom end of the pressurizing connector 3 is connected with the boss II 401 of the upper drainage connector 4 through threads, the boss III of the upper drainage connector 4 is connected with the boss I1-1 of the outer pipe A1 through threads, the pressurizing nozzle stop block 6 is connected with the pressurizing nozzle connecting block 7 through threads and the boss IV 403 of the upper drainage connector 4 respectively, and the top end of the drainage tube 8 and the top end of the inner pipe C9 are connected with the boss IV 403 and the boss V404 through threads respectively; the connecting mechanism consists of an upper flow dividing 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 Kong 1207 and a flow passing 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 pipe D10, the bottom end of an inner pipe C9 and the top end of an outer pipe E14 through threads, and the upper flow dividing plate 11 and the reducer union 13 are respectively connected with the groove I1203 and the groove II 1205 of the backflow joint 12 through threads; the drainage mechanism comprises an outer tube E14, an inner tube F15, a jet tube 16, a jet tube gasket 17, a lower drainage joint 18, a drainage nozzle 19, a drainage nozzle stop 20, a drainage nozzle connecting block 21, an inner tube G22, an outer tube H23, a lower flow dividing plate 24 and a flow passage changing joint 25, wherein the top end of the inner tube F15 is connected with the bottom end of the reducing joint 13 through threads, the lower drainage joint 18 is provided with a boss IX 1801, a boss X1802, a boss XI 1803, a boss XII 1804, a suction hole 1805, a reflux Kong 1806 and a flow passing hole III 1807, the flow passage changing joint 25 is provided with a boss i 2501, a boss ii 2502, a boss iii 2503 and a flow passing hole IV 2504, the bottom end of the outer tube E14, the bottom end of the inner tube F15, the top end of the outer tube H23 and the top end of the inner tube G22 are respectively connected with the boss IX 1801, the boss XI 1803 and the boss 1804 of the lower drainage joint 18 through threads, the jet tube 16 is fixed inside the inner tube F15, the jet tube X1803 is arranged between the jet tube 16 and the lower drainage joint 18, the drainage nozzle 19 is connected with the flow dividing plate 2502 through threads, the flow dividing plate 2503 and the flow passage 2503 is respectively connected with the bottom end of the outer tube F15 through threads and the flow dividing plate 2503 through the flow dividing joint 2502, the flow passage 2503 and the flow passage connecting block 2504 is respectively.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the pressurizing connector 3 is internally provided with a throat channel 3-1, the bottom end of the throat 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 channel 3-1 is provided with a diffusion pipe for decelerating and pressurizing the returned liquid.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the two sides of the upper flow dividing plate 11 and the lower flow dividing plate 24 are respectively provided with a cylindrical separation layer I11-1 and a cylindrical separation layer II 24-1, which have the function of dividing power fluid; the middle is respectively provided with a conical flow guiding column I11-2 and a conical flow guiding column II 24-2 which are respectively used for the power fluid to enter the drainage tube 8 and the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: a baffle is arranged in the inner tube F15 and used for limiting the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the upper drainage joint 4 is provided with backflow holes I405 and overflow holes I406 which are uniformly distributed in the circumferential direction and are respectively used for flowing the returned liquid and the power liquid; the middle is provided with a backflow hole II 407 containing a throat channel for sucking the backflow liquid of the backflow hole I405.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outside of the reflux joint 12 is provided with reflux Kong 1207 and an overflow hole II 1208 which are uniformly distributed in the circumferential direction and are respectively used for circulating the reflux liquid and the power liquid; a return orifice iii 1206 is provided in the middle for the return flow after passing through the jet pipe 16.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the outer side of the lower drainage joint 18 is provided with suction holes 1805 and overflow holes III 1807 which are uniformly distributed in the circumferential direction and are respectively used for sucking mixed slurry and circulating power liquid; a backflow hole v 1806 is provided in the middle for flowing the power fluid through the inner tube G22.
The hydraulic lifting pump for the underground concentric pipes is characterized in that: the runner conversion joint 25 is provided with key slot type overflow holes IV 2504 which are uniformly distributed in the circumferential direction and are used for enabling power fluid to flow to the bottom tubular column.
The working process of the invention is as follows: when the double-layer pipe natural gas hydrate drilling and production device is used for drilling and production of double-layer pipe natural gas hydrates, a single tool or a plurality of tools are simultaneously connected into a horizontal well section underground device combination, the frequency conversion control cabinet on the ground controls the flow rate of power fluid through controlling the rotation speed of a ground pump, the output of mixed slurry can be regulated, after the power fluid is pressurized by the ground pump, the power fluid reaches the annulus between an outer pipe A1 and an inner pipe B2 through a pipe column, high-pressure power fluid enters the annulus between a drainage pipe 8 and an inner pipe C9 through an overflow hole I406 from the annulus between the outer pipe A1 and the inner pipe B2, the upper flow distribution plate 11 plays a role in 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 nozzle 5, the other part of the power fluid enters the annulus between an outer pipe E14 and an inner pipe F15 through an overflow hole II 1208, then enters the annulus between an inner pipe G22 and an outer pipe H23 through an overflow hole III 1807, through the lower flow dividing plate 24, the lower flow dividing plate 24 divides the power liquid, one part of the power liquid enters the lower pipe column through the flow passing 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 nozzle 19, mixed slurry is pumped into the jet pipe 16 through the pumping hole 1805, the power liquid and the mixed slurry are mixed to form returned liquid, the returned liquid enters the inner pipe F15 after being subjected to speed reduction and pressure boosting, then sequentially passes through the reducer union 13 and the return hole IV 1207 and enters the annulus between the inner pipe C9 and the outer pipe D10, enters the return hole I405 and is pumped by the pressure boosting nozzle 5, the power liquid and the returned liquid are mixed together at the pressure boosting joint 3 and enter the inner pipe B2 after being subjected to speed reduction and pressure boosting, the returned liquid enters the upper pipe column and is conveyed to a mining platform at sea level through the pipe column for deep processing, under the double negative pressure absorption effect of the pressure boosting mechanism and the drainage mechanism, high efficiency production of the mixed slurry is achieved.
It is apparent that the above examples are given by way of illustration only and not by way of limitation, and that other variations or modifications may be made in the various forms based on the above description by those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (8)
1. The hydraulic lifting pump for the underground concentric pipes is characterized by comprising a pressurizing mechanism, a connecting mechanism and a drainage mechanism; wherein the pressurizing mechanism consists of an outer pipe A (1), an inner pipe B (2), a pressurizing connector (3), an upper drainage connector (4), a pressurizing nozzle (5), a pressurizing nozzle stop block (6), a pressurizing nozzle connecting block (7), a drainage tube (8), an inner pipe C (9) and an outer pipe D (10), wherein the bottom end of the outer pipe A (1) is connected with the top end of the outer pipe D (10) through threads, the bottom end of the inner pipe B (2) is connected with the top end of the pressurizing 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 V (404), a backflow hole I (405), an overflow hole I (406) and a backflow hole II (407), the bottom end of the pressurizing 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 I (1-1) of the outer pipe A (10) through threads, the pressurizing nozzle (5) is connected with the pressurizing nozzle stop block (6) and the pressurizing nozzle (7) through threads respectively connected with the boss IV (403) of the upper drainage connector (4) through threads, the top end of the drainage tube (8) and the top end of the inner tube C (9) are respectively connected with a boss IV (403) and a boss V (404) of the upper drainage joint (4) through threads; the connecting mechanism consists of an upper splitter plate (11), a reflux joint (12) and a reducer union (13), wherein the reflux 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 reflux hole III (1206), a reflux Kong (1207) and a flow through hole II (1208), the boss VI (1201), the boss VII (1202) and the boss VIII (1204) of the reflux joint (12) are respectively connected with the bottom end of an outer pipe D (10), the bottom end of an inner pipe C (9) and the top end of an outer pipe E (14) through threads, and the upper splitter plate (11) and the reducer union (13) are respectively connected with the groove I (1203) and the groove II (1205) of the reflux joint (12) through threads; the drainage mechanism consists of an outer tube E (14), an inner tube F (15), a jet tube (16), a jet tube gasket (17), a lower drainage joint (18), a drainage nozzle (19), a drainage nozzle stop block (20), a drainage nozzle connecting block (21), an inner tube G (22), an outer tube H (23), a lower flow dividing plate (24) and a flow passage conversion joint (25), wherein the top end of the inner tube F (15) is in threaded connection with the bottom end of a reducer joint (13), the lower drainage 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 Kong (1806) and an overflow hole III (1807), the flow passage conversion joint (25) is provided with a boss i (2501), a boss ii (2502), a boss 2503) and an overflow hole IV (2504), the bottom end of the outer tube E (14), the bottom end of the inner tube F (15), the top end of the outer tube H (23), the top end of the inner tube G (22) are respectively fixed with the boss IX (1), the boss XI (1803), the boss XI (18016) of the lower drainage joint (18) through threads, the boss XII (1803) and the boss XII (1803) respectively, the boss XII (1803) is fixed with the inner tube (16) in the jet tube, the jet tube gasket (16), the drainage nozzle (19) is connected with the drainage nozzle connecting block (21) through threads, the drainage nozzle stop block (20) is connected with the drainage nozzle connecting block (21) through threads and a boss XII (1804) of the lower drainage joint (18) respectively, and the bottom end of the outer tube H (23) and the lower flow dividing plate (24) are connected with a boss i (2501) and a boss iii (2503) of the runner conversion joint (25) through threads respectively.
2. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the supercharging joint (3) is internally provided with a throat channel (3-1), the bottom end of the throat 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 channel (3-1) is provided with a diffusion pipe for decelerating and supercharging the returned liquid.
3. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the two sides of the upper flow dividing plate (11) and the lower flow dividing plate (24) are respectively provided with a cylindrical separation layer I (11-1) and a cylindrical separation layer II (24-1), and the two sides of the upper flow dividing plate and the two sides of the lower flow dividing plate are respectively provided with a cylindrical separation layer I (11-1) and a cylindrical separation layer II (24-1) which have the function of dividing power fluid; the middle is respectively provided with a conical flow guiding column I (11-2) and a conical flow guiding column II (24-2) which are respectively used for the power fluid to enter the drainage tube (8) and the inner tube G (22).
4. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the outer side of the upper drainage joint (4) is provided with backflow holes I (405) and overflow holes I (406) which are uniformly distributed in the circumferential direction and are respectively used for flowing the returned liquid and the power liquid; the middle is provided with a backflow hole II (407) containing a throat channel for sucking the backflow liquid of the backflow hole I (405).
5. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the outside of the reflux joint (12) is provided with reflux Kong (1207) and an overflow hole II (1208) which are uniformly distributed in the circumferential direction and are respectively used for circulating the reflux liquid and the power liquid; a return hole III (1206) is arranged in the middle and is used for circulating the return liquid after passing through the jet pipe (16).
6. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the outer side of the lower drainage joint (18) is provided with circumferentially and uniformly distributed suction holes (1805) and overflow holes III (1807) which are respectively used for sucking mixed slurry and circulating power liquid; a reflux hole V (1806) is arranged in the middle and is used for circulating the power fluid after passing through the inner tube G (22).
7. A downhole concentric tube hydraulic lift pump as claimed in claim 1, wherein: the runner conversion joint (25) is provided with key slot type overflow holes IV (2504) which are uniformly distributed in the circumferential direction and are used for enabling power fluid to flow to a bottom tubular column.
8. A pumping and lifting method using a downhole concentric tube hydraulic lifting pump as claimed in any one of claims 1-7, characterized in that: when the production operation is carried out, the working procedures of the method are divided into a ground pumping process, a power liquid injection process, a power liquid downward moving process, a mixed slurry sucking 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 frequency conversion control cabinet on the ground controls the flow of the power fluid by controlling the rotating speed of the ground pump, the output of the mixed slurry can be regulated, and the power fluid reaches the annulus between the outer pipe A (1) and the inner pipe B (2) through the pipe column after being pressurized by the ground pump;
s2, a power fluid injection process: after the high-pressure power fluid enters the annulus between the drainage tube (8) and the inner tube C (9) through the overflow hole I (406) from the annulus between the outer tube A (1) and the inner tube B (2), the high-pressure power fluid passes through the upper flow dividing plate (11), the upper flow dividing plate (11) has a flow dividing function on the power fluid, one part of the power fluid enters the drainage tube (8), the other part of the power fluid enters the annulus between the outer tube E (14) and the inner tube F (15) through the overflow hole II (1208), and then enters the annulus between the inner tube G (22) and the outer tube H (23) through the overflow hole III (1807);
s3, a power fluid downward moving process: the high-pressure power fluid passes through an annulus between the inner tube G (22) and the outer tube H (23) and passes through a lower flow dividing plate (24), the power fluid is divided by the lower flow dividing plate (24), and a part of the power fluid enters the lower tubular column through an overflow hole IV (2504);
s4, a mixed slurry sucking process: the other part of high-pressure power fluid which is split by the lower splitter plate (24) enters the inner pipe G (22), negative pressure is generated at the nozzle of the drainage nozzle (19), 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 return fluid, the return fluid enters the inner pipe F (15) after being subjected to speed reduction and pressurization, and then the return fluid sequentially passes through the reducer union (13) and the return fluid Kong (1207) and enters an annulus between the inner pipe C (9) and the outer pipe D (10);
s5, a returning liquid pressurizing process: a part of high-pressure power fluid 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), annulus return fluid between the inner tube C (9) and the outer tube D (10) is sucked into the pressurizing joint (3) through the return hole I (405), and the return fluid and the power fluid are mixed in the pressurizing joint (3) and enter the inner tube B (2) after being decelerated and pressurized;
s6, lifting the returned liquid: under the double negative pressure absorption action of the pressurizing mechanism and the drainage mechanism, the returned liquid enters the upper pipe column through the inner pipe B (2), reaches the ground through pipe column migration, and is subjected to sand removal, oil-gas-liquid separation and purification, and cycle reciprocation, so that high-efficiency production operation is realized.
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