CN107559245B - Deep well jet device - Google Patents
Deep well jet device Download PDFInfo
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- CN107559245B CN107559245B CN201710955514.6A CN201710955514A CN107559245B CN 107559245 B CN107559245 B CN 107559245B CN 201710955514 A CN201710955514 A CN 201710955514A CN 107559245 B CN107559245 B CN 107559245B
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- sealing ring
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- deep well
- water inlet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Jet Pumps And Other Pumps (AREA)
Abstract
The invention provides a deep well jet device, and belongs to the technical field of deep well pumps. The deep well jet device solves the problem that an existing deep well jet device is complex in installation process. The deep well jet device comprises a jet pipe and a water inlet pipe, wherein the lower end of the jet pipe is connected with the upper end of the water inlet pipe, a water return port is formed in the side wall of the jet pipe, at least one sealing ring is sleeved at the lower end of the jet pipe, the sealing ring is positioned between the water return port and the water inlet pipe, a positioning piece which can circumferentially position the water inlet pipe in the outer pipe is arranged on the water inlet pipe, the sealing ring is made of flexible materials, the jet pipe is in threaded connection with the water inlet pipe, and a clamping structure which can extrude the sealing ring and enable the sealing ring to radially expand and compress on the inner wall of the outer pipe when the jet pipe rotates and moves downwards is arranged between the jet pipe and the water inlet pipe. The deep well jet device is more convenient to install and fix.
Description
Technical Field
The invention belongs to the technical field of deep well pumps, and relates to a deep well jet device.
Background
The ejector mainly comprises a nozzle, a suction chamber, a diffuser pipe and a water inlet pipe, wherein the nozzle is positioned in the suction chamber, the diffuser pipe is positioned above the suction chamber, the water inlet pipe is positioned below the suction chamber, the ejector mainly utilizes the jet negative pressure principle, liquid is ejected from the nozzle at high speed under the high-speed rotation of a pump impeller, vacuum is formed in the suction chamber after the liquid flowing at high speed passes through the ejector, the vacuum negative pressure can suck water through the water inlet pipe below, so that water pumping is realized, the ejector is fixedly inserted into an outer pipe when in use, the ejector can form a seal with the inner wall of the outer pipe, the sealing position is positioned below the suction chamber, then the outer pipe is inserted into a deep well, the diffuser pipe is connected with a water pump, water above the sealing position forms water flow circulation when the water pump starts to work, in the circulation process, the nozzle enables the suction chamber to form negative pressure, and the negative pressure of the suction chamber generates suction force on the water inlet pipe, so that water below the sealing position is sucked, and water is pumped.
The Chinese patent application (application number: CN 200620095249.6) discloses a jet device, which comprises a base, a water injection plug and a sealing gasket which are sealed on a water injection port on the base, a water inlet and a water outlet which are arranged on one side of the base up and down, a jet base, an inner connecting pipe, an outer pipe, a connector, a straight pipe, a nozzle and a backflow water inlet, wherein the outer pipe is required to be inserted into a deep well, the jet device is required to be fixedly installed in the outer pipe, the straight pipe, the connector, the inner connecting pipe and the outer pipe are required to be sequentially connected during installation, then the jet device is connected with the jet base, and finally the jet device is connected with a self-priming pump, namely the jet device is required to be installed one by one, and the whole installation process is complicated.
Disclosure of Invention
The invention aims at solving the problems in the prior art and provides a deep well jet device which is more convenient to install and fix.
The aim of the invention can be achieved by the following technical scheme: the utility model provides a deep well ejector, includes jet pipe and inlet tube, the lower extreme of jet pipe is connected with the upper end of inlet tube, the return water mouth has been seted up on the lateral wall of jet pipe, the lower extreme of jet pipe still overlaps and is equipped with at least one sealing ring, and the sealing ring is located between return water mouth and the inlet tube, a serial communication port, be equipped with the setting element that can fix a position the inlet tube circumference in the outer tube on the inlet tube, the sealing ring adopts flexible material to make, jet pipe and inlet tube threaded connection, and be equipped with between jet pipe and the inlet tube and can extrude the sealing ring and make the radial expansion of sealing ring compress tightly the tight structure on the outer tube inner wall when jet pipe rotates and moves down.
The deep well jet device is inserted into the outer tube from top to bottom during installation, the positioning piece can act on the inner wall of the outer tube, the water inlet pipe and the outer tube are circumferentially positioned, then the jet pipe is rotated, because the jet pipe is in threaded connection with the water inlet pipe, and the water inlet pipe is circumferentially fixed, the jet pipe can move downwards relative to the water inlet pipe when rotating, at the moment, the clamping structure can enable the sealing ring to radially expand and tightly press on the inner wall of the outer tube, the compression force between the sealing ring and the outer tube can axially fix the deep well jet device, and the threaded fit between the jet pipe and the water inlet pipe can realize axial self-locking after the fixation is good, so that the deep well jet device is installed and fixed, the operation is simple and convenient, and the sealing ring and the inner wall of the outer tube can be better sealed due to the fact that the deep well jet device is fixed through the tensioning force of the sealing ring.
In the deep well jet device, the jet pipe comprises a jet pipe body and a water passing pipe body, the lower end of the jet pipe body is fixedly sleeved at the upper end of the water passing pipe body, and the upper end of the water inlet pipe is sleeved at the lower end of the water passing pipe body and is in threaded connection with the water passing pipe body. The jet pipe is made into a split type, so that the jet pipe body is more convenient to process and the sealing ring is convenient to install.
In the deep well jet device, the clamping structure comprises a flat end face at the lower end of the jet pipe body and a flat end face at the upper end of the water inlet pipe, the sealing ring is located between the flat end face at the lower end of the jet pipe body and the flat end face at the upper end of the water inlet pipe, and when the jet pipe rotates and moves downwards, the flat end face at the lower end of the jet pipe body and the flat end face at the upper end of the water inlet pipe can axially squeeze the sealing ring. When the jet pipe rotates, the straight end face of the lower end of the jet pipe body is relatively close to the straight end face of the upper end of the water inlet pipe, and the two straight end faces can squeeze the sealing ring, so that the sealing ring radially expands, the clamping structure can be a limiting convex edge positioned on the outer wall of the water passing pipe body and the outer wall of the water inlet pipe, and the sealing ring is positioned between the two limiting convex edges.
In the deep well jet device, the outer circumferential surface of the sealing ring is a cylindrical surface, the first pushing conical surface is circumferentially arranged at two ends of the sealing ring, one end with a larger diameter of the first pushing conical surface faces outwards, and the water passing pipe body is further sleeved with the first annular framework and the second annular framework which can act on the first pushing conical surface and enable the sealing ring to radially expand when the jet pipe rotates and moves downwards. When the straight end face of the lower end of the jet pipe body is close to the straight end face of the upper end of the water inlet pipe, the first annular framework and the second annular framework can be subjected to extrusion force, at the moment, the first annular framework and the second annular framework can act on the pushing conical surface of the sealing ring, and the pushing conical surface can expand outwards in the radial direction when the pushing conical surface is subjected to acting force, so that radial expansion of the sealing ring is realized.
In the deep well jet device, the sealing rings are arranged in the axial direction of the water passing pipe body, the annular framework I is arranged between every two adjacent sealing rings, and the annular framework II is arranged between the injection pipe body and the adjacent sealing rings and between the water inlet pipe and the adjacent sealing rings. The sealing rings at the uppermost part and the lowermost part are clamped by the first annular framework and the second annular framework, the sealing ring at the middle part is clamped by the first annular framework, so that the sealing rings are separated, the stress of the sealing rings is more uniform, the sealing rings can be radially expanded and the expansion degree is kept uniform, the fixing force between the sealing rings and the inner wall of the outer tube is more uniform, and the stability after the fixing is higher.
In the deep well jet device, one end of the annular framework I and one end of the annular framework II, which faces the sealing ring, are provided with annular pushing parts, the pushing parts are provided with pushing conical surfaces II in the circumferential direction, one end of the pushing conical surface II with a smaller diameter faces outwards, the pushing conical surfaces II are opposite to the pushing conical surfaces I, the taper of the pushing conical surfaces I is smaller than that of the pushing conical surfaces II, and when the jet pipe rotates and moves downwards, the pushing conical surfaces II can radially outwards push the pushing conical surfaces I. The annular framework I and the annular framework II are axially pressed, the pushing conical surface II on the pushing parts can gradually extrude the pushing conical surface I, and the pushing conical surface II has larger conicity than the pushing conical surface I, so that when the pushing conical surface I is attached to the pushing conical surface II, the length of the sealing ring is reduced, the outer diameter is increased, and larger pressing force is generated between the sealing ring and the inner wall of the outer tube.
In the deep well jet device, the two ends of the sealing ring are circumferentially provided with the first guide plane, the first guide plane is positioned at the outer side of the pushing conical surface I, one ends of the annular framework I and the annular framework II, which face the sealing ring, are circumferentially provided with the second guide plane, the second guide plane is positioned at the outer side of the pushing conical surface II, and the second guide plane is abutted against the first guide plane of the sealing ring. When the sealing ring is clamped and deformed, the second guide plane can guide the first guide plane, so that the sealing ring deforms radially, namely the sealing ring can expand radially, and is fixed in the outer tube in a pressing mode.
In the deep well jet device, the outer circumferential surface of the sealing ring is also provided with an annular yielding groove in the circumferential direction, the bottom surface of the yielding groove is an arc surface, and the yielding groove is positioned in the middle of the axial direction of the sealing ring. The groove of stepping down provides the space of deformation for the entity part at sealing ring both ends, and the cambered surface on the groove of stepping down can avoid stress concentration to the deformation of sealing ring is more even.
In the deep well jet device, the end face of the end, far away from the sealing ring, of the annular framework II is a concave face, the straight end face of the lower end of the jet pipe body abuts against the concave face edge of the annular framework II, and the straight end face edge of the upper end of the water inlet pipe abuts against the concave face of the annular framework II. When the jet pipe starts to rotate, the sealing ring, the first annular framework and the second annular framework can rotate along with the water pipe body, at the moment, the edge of the straight end face of the upper end of the water inlet pipe is propped against the concave face of the second annular framework, and the edge of the straight end face of the upper end of the water inlet pipe is in line contact with the concave face of the second annular framework so as to reduce friction and abrasion of the second annular framework.
In the deep well jet device, the positioning piece comprises a plurality of long elastic metal sheets, the length direction of each elastic metal sheet is axially arranged along the water inlet pipe, the upper ends of the elastic metal sheets are fixedly connected to the outer wall of the water inlet pipe, the lower ends of the elastic metal sheets are slidably abutted to the outer wall of the water inlet pipe, the middle parts of the elastic metal sheets arch outwards along the radial direction of the water inlet pipe, and the elastic metal sheets are circumferentially distributed. When the ejector inserts the outer tube, the arched part of the elastic metal sheet can be propped against the inner wall of the outer tube, but the axial movement of the ejector is not hindered, and the edge of the arched part of the elastic metal sheet can generate larger friction resistance with the inner wall of the outer tube after moving in place, so that the water inlet tube is circumferentially positioned, the positioning piece can also adopt a long strip-shaped rubber block in the actual processing process, the rubber block is axially fixed on the outer wall of the water inlet tube along the water inlet tube, and the outer end surface of the rubber block is an arc surface.
Compared with the prior art, the deep well jet device has the following advantages:
1. because jet pipe and inlet tube threaded connection, and the inlet tube can be fixed in the outer tube circumferentially, consequently jet pipe can be relative inlet tube downwardly moving when rotating, and clamping structure can make the sealing ring radial expansion and compress tightly on the outer tube inner wall, and the packing force between sealing ring and the outer tube can be with deep well ejector axial fixity, and the screw-thread fit between jet pipe and the inlet tube can realize axial self-locking after fixing to accomplish the installation fixedly to deep well ejector, easy operation is convenient.
2. Because the pushing parts are arranged at the two ends of each sealing ring, the pushing conical surface II can gradually extrude the pushing conical surface I, and because the taper of the pushing conical surface II is larger than that of the pushing conical surface I, when the pushing conical surface I is attached to the pushing conical surface II, the length of the sealing ring is reduced, the outer diameter is increased, and therefore a larger pressing force is generated between the sealing ring and the inner wall of the outer tube.
3. Because the deep well jet device is fixed by the tension force of the sealing ring, the sealing ring and the inner wall of the outer tube can be well sealed.
Drawings
Fig. 1 is a schematic perspective view of a deep well jet.
Fig. 2 is a structural cross-sectional view of the deep well jet device.
Fig. 3 is an enlarged view of the structure at a in fig. 2.
Fig. 4 is a schematic perspective view of a seal ring.
Fig. 5 is a schematic perspective view of a first ring frame.
Fig. 6 is an enlarged view of the structure at B in fig. 2.
Fig. 7 is an enlarged view of the structure at C in fig. 2.
In the figure, 1, jet pipe; 11. a jet pipe body; 111. a water return port; 12. a water passing pipe body; 2. a water inlet pipe; 3. a seal ring; 31. pushing the conical surface I; 32. a first guide plane; 33. a relief groove; 4a, an annular framework I; 4b, an annular framework II; 41. a pushing part; 411. pushing the conical surface II; 42. a second guide plane; 5. an elastic metal sheet.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, a deep well jet device comprises a jet pipe 1 and a water inlet pipe 2, wherein the jet pipe 1 comprises a jet pipe body 11 and a water passing pipe body 12, the lower end of the jet pipe body 11 is fixedly sleeved at the upper end of the water passing pipe body 12, the upper end of the water inlet pipe 2 is sleeved at the lower end of the water passing pipe body 12 and is in threaded connection with the water passing pipe body 12, a water return port 111 is formed in the side wall of the jet pipe 1, three sealing rings 3 are sleeved at the lower end of the jet pipe 1, the sealing rings 3 are positioned between the water return port 111 and the water inlet pipe 2, the sealing rings 3 are axially arranged along the water passing pipe body 12, an annular framework I4 a is arranged between each two adjacent sealing rings 3, an annular framework II 4b is arranged between the jet pipe body 11 and each adjacent sealing ring 3, and between each water inlet pipe 2 and each adjacent sealing ring 3, the lower end of the jet pipe body 11 and the upper end of each water inlet pipe 2 are provided with straight end faces, each sealing ring 3 is positioned between the straight end faces of the lower end of the jet pipe body 11 and the straight end faces of the upper end of the water inlet pipe 2, and when the jet pipe 1 rotates and moves downwards, and the straight end faces of the lower ends of the jet pipe body 11 can be extruded along the straight ends of the water inlet pipe 3. Be equipped with a plurality of long banding elastic metal pieces 5 on the inlet tube 2 outer wall, the length direction of elastic metal piece 5 sets up along inlet tube 2 axial, and the upper end of elastic metal piece 5 all links firmly on inlet tube 2's outer wall, the lower extreme is all slided and is supported on inlet tube 2's outer wall, the middle part of elastic metal piece 5 is outwards arched along inlet tube 2 is radial, a plurality of elastic metal pieces 5 circumference distribute, when the ejector inserts the outer tube, the arch part of elastic metal piece 5 can support on the outer tube inner wall, but can not hinder the axial displacement of ejector, the border of the arch part of elastic metal piece 5 can produce great frictional resistance with the outer tube inner wall after moving in place, thereby carry out circumference location to inlet tube 2.
As shown in fig. 3, 4 and 5, the sealing ring 3 is made of flexible materials, the sealing ring has elasticity, the outer peripheral surface of the sealing ring 3 is a cylindrical surface, the two ends of the sealing ring 3 are circumferentially provided with a pushing conical surface I31, one end of the pushing conical surface I31 with a larger diameter faces outwards, one end of the annular framework I4 a and one end of the annular framework II 4b, which faces the sealing ring 3, are circumferentially provided with annular pushing parts 41, the pushing parts 41 are circumferentially provided with a pushing conical surface II 411, one end of the pushing conical surface II 411 with a smaller diameter faces outwards, the pushing conical surface II 411 is opposite to the pushing conical surface I31, the taper of the pushing conical surface I31 is smaller than that of the pushing conical surface II 411, and when the jet pipe 1 rotates and moves downwards, the pushing conical surface II 411 can radially outwards push the pushing conical surface I31. The two ends of the sealing ring 3 are also circumferentially provided with a first guide plane 32, the first guide plane 32 is positioned at the outer side of the first pushing conical surface 31, one end, facing the sealing ring 3, of the annular framework I4 a and the annular framework II 4b is circumferentially provided with a second guide plane 42, the second guide plane 42 is positioned at the outer side of the second pushing conical surface 411, and the second guide plane 42 is abutted against the first guide plane 32 of the sealing ring 3. Annular yielding grooves 33 are circumferentially formed in the outer circumferential surface of the sealing ring 3, the bottom surfaces of the yielding grooves 33 are cambered surfaces, the yielding grooves 33 are located in the middle of the axial direction of the sealing ring 3, and the yielding grooves 33 provide deformation space for the solid parts at the two ends of the sealing ring 3. As shown in fig. 6 and 7, the end surface of the second annular framework 4b far away from the sealing ring 3 is a concave surface, the straight end surface of the lower end of the injection pipe body 11 abuts against the concave surface edge of the second annular framework 4b, and the straight end surface edge of the upper end of the water inlet pipe 2 abuts against the concave surface of the second annular framework 4 b.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms jet pipe 1, jet pipe body 11, return water port 111, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (10)
1. The utility model provides a deep well ejector, includes jet pipe (1) and inlet tube (2), the lower extreme of jet pipe (1) is connected with the upper end of inlet tube (2), return water mouth (111) have been seted up on the lateral wall of jet pipe (1), the lower extreme of jet pipe (1) still overlaps and is equipped with at least one sealing ring (3), and sealing ring (3) are located between return water mouth (111) and inlet tube (2), a serial communication port, be equipped with on inlet tube (2) and be equipped with the setting element that can fix a position inlet tube (2) circumference in the outer tube, sealing ring (3) adopt flexible material to make, jet pipe (1) and inlet tube (2) threaded connection, and be equipped with between jet pipe (1) and inlet tube (2) and can extrude sealing ring (3) and make sealing ring (3) radial expansion compress tightly the clamp structure on outer tube inner wall when jet pipe (1) rotates and moves down.
2. Deep well jet device according to claim 1, characterized in that the jet pipe (1) comprises a jet pipe body (11) and a water passing pipe body (12), the lower end of the jet pipe body (11) is fixedly sleeved at the upper end of the water passing pipe body (12), and the upper end of the water inlet pipe (2) is sleeved at the lower end of the water passing pipe body (12) and is in threaded connection with the water passing pipe body (12).
3. Deep well jet device according to claim 2, characterized in that the clamping structure comprises a straight end face of the lower end of the jet pipe body (11) and a straight end face of the upper end of the water inlet pipe (2), the sealing ring (3) is located between the straight end face of the lower end of the jet pipe body (11) and the straight end face of the upper end of the water inlet pipe (2), and the straight end face of the lower end of the jet pipe body (11) and the straight end face of the upper end of the water inlet pipe (2) can press the sealing ring (3) in the axial direction when the jet pipe (1) rotates and moves downwards.
4. A deep well jet device according to claim 3, wherein the outer circumferential surface of the sealing ring (3) is a cylindrical surface, two ends of the sealing ring (3) are circumferentially provided with a pushing conical surface I (31), one end with a larger diameter of the pushing conical surface I (31) faces outwards, and the water passing pipe body (12) is further sleeved with an annular framework I (4 a) and an annular framework II (4 b) which can act on the pushing conical surface I (31) and enable the sealing ring (3) to radially expand when the jet pipe (1) rotates and moves downwards.
5. The deep well jet device according to claim 4, wherein the number of the sealing rings (3) is several, the sealing rings (3) are axially arranged along the water pipe body (12), the annular framework I (4 a) is arranged between every two adjacent sealing rings (3), and the annular framework II (4 b) is arranged between the jet pipe body (11) and the adjacent sealing rings (3) and between the water inlet pipe (2) and the adjacent sealing rings (3).
6. The deep well jet device according to claim 5, wherein one end of the annular framework I (4 a) and one end of the annular framework II (4 b) facing the sealing ring (3) are provided with annular pushing parts (41), the pushing parts (41) are provided with pushing conical surfaces II (411) in the circumferential direction, one end of the pushing conical surfaces II (411) with smaller diameter faces outwards, the pushing conical surfaces II (411) are opposite to the pushing conical surfaces I (31), the taper of the pushing conical surfaces I (31) is smaller than that of the pushing conical surfaces II (411), and when the jet pipe (1) rotates and moves downwards, the pushing conical surfaces II (411) can push the pushing conical surfaces I (31) outwards in the radial direction.
7. The deep well jet device according to claim 6, wherein the two ends of the sealing ring (3) are also provided with a first guiding plane (32) circumferentially, the first guiding plane (32) is located at the outer side of the pushing conical surface (31), the first annular framework (4 a) and the second annular framework (4 b) are provided with a second guiding plane (42) circumferentially at one end, facing the sealing ring (3), of the sealing ring, the second guiding plane (42) is located at the outer side of the pushing conical surface (411), and the second guiding plane (42) is abutted against the first guiding plane (32) of the sealing ring (3).
8. Deep well jet device according to claim 4 or 5 or 6 or 7, characterized in that the peripheral surface of the sealing ring (3) is provided with a ring-shaped yielding groove (33) in the circumferential direction, the bottom surface of the yielding groove (33) is a cambered surface, and the yielding groove (33) is positioned in the middle part of the sealing ring (3) in the axial direction.
9. Deep well jet device according to claim 5, 6 or 7, characterized in that the end surface of the second annular skeleton (4 b) far away from the sealing ring (3) is a concave surface, the flat end surface of the lower end of the jet pipe body (11) is abutted against the concave surface edge of the second annular skeleton (4 b), and the flat end surface edge of the upper end of the water inlet pipe (2) is abutted against the concave surface of the second annular skeleton (4 b).
10. Deep well jet device according to any one of claims 1-7, characterized in that the positioning element comprises a plurality of strip-shaped elastic metal sheets (5), the length direction of the elastic metal sheets (5) is axially arranged along the water inlet pipe (2), the upper ends of the elastic metal sheets (5) are fixedly connected to the outer wall of the water inlet pipe (2), the lower ends of the elastic metal sheets are slidably abutted to the outer wall of the water inlet pipe (2), the middle parts of the elastic metal sheets (5) are arched outwards along the radial direction of the water inlet pipe (2), and a plurality of elastic metal sheets (5) are circumferentially distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710955514.6A CN107559245B (en) | 2017-10-14 | 2017-10-14 | Deep well jet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710955514.6A CN107559245B (en) | 2017-10-14 | 2017-10-14 | Deep well jet device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107559245A CN107559245A (en) | 2018-01-09 |
| CN107559245B true CN107559245B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710955514.6A Active CN107559245B (en) | 2017-10-14 | 2017-10-14 | Deep well jet device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117552786B (en) * | 2024-01-12 | 2024-04-09 | 中煤科工开采研究院有限公司 | Top plate frosted jet flow fracturing and top cutting device and top cutting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4744730A (en) * | 1986-03-27 | 1988-05-17 | Roeder George K | Downhole jet pump with multiple nozzles axially aligned with venturi for producing fluid from boreholes |
| US5628623A (en) * | 1993-02-12 | 1997-05-13 | Skaggs; Bill D. | Fluid jet ejector and ejection method |
| CN202612077U (en) * | 2012-06-29 | 2012-12-19 | 宁波汇龙泵业有限公司 | Jet device |
| WO2014006373A2 (en) * | 2012-07-06 | 2014-01-09 | Meta Downhole Limited | A tubular connection |
| CN103256072B (en) * | 2013-06-09 | 2015-09-02 | 武汉大学 | A kind of additional high pressure water jet slot blowout hookup |
| CN207333317U (en) * | 2017-10-14 | 2018-05-08 | 浙江豪贝泵业股份有限公司 | A kind of deep-well ejector |
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2017
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