CN117065398B - Multi-stage rotational flow purification device for underground oil and water of same well injection and production - Google Patents
Multi-stage rotational flow purification device for underground oil and water of same well injection and production Download PDFInfo
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- CN117065398B CN117065398B CN202311085784.8A CN202311085784A CN117065398B CN 117065398 B CN117065398 B CN 117065398B CN 202311085784 A CN202311085784 A CN 202311085784A CN 117065398 B CN117065398 B CN 117065398B
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Abstract
本发明涉及的是同井注采井下油水多级旋流净化装置，它包括总外壳、端盖、一级旋流模块，二级旋流模块和三级旋流模块，一级旋流模块，二级旋流模块和三级旋流模块自上至下依次连接并设置于总外壳内构成三级变尺寸复合倒锥式油水分离装置，端盖设置于总外壳的上端口，端盖有油相出口，总外壳上端均布外进料口；外桥式通道与总外壳螺纹连接且位于总外壳与一级外壳外间；一级旋流模块通过一级内桥式通道连接二级旋流模块，二级旋流模块通过二级内桥式通道连接三级旋流模块，三级旋流模块的三级螺旋流道有环形封隔板，环形封隔板将油套环空分隔成两部分。本发明将倒锥和三级分离系统相结合，通过内部流道增强油水分离效率，实现了高效油水两相分离。
The present invention relates to a multi-stage cyclone purification device for underground oil and water injection and production in the same well, which includes a main shell, an end cover, a primary cyclone module, a secondary cyclone module and a tertiary cyclone module. The primary cyclone module, the secondary cyclone module and the tertiary cyclone module are sequentially connected from top to bottom and arranged in the main shell to form a three-stage variable-size composite inverted cone oil-water separation device, the end cover is arranged at the upper port of the main shell, the end cover has an oil phase outlet, and the upper end of the main shell is evenly distributed with an external feed port; the outer bridge channel is threadedly connected to the main shell and is located between the main shell and the primary shell; the primary cyclone module is connected to the secondary cyclone module through the primary inner bridge channel, the secondary cyclone module is connected to the tertiary cyclone module through the secondary inner bridge channel, and the tertiary spiral flow channel of the tertiary cyclone module has an annular baffle plate, and the annular baffle plate separates the oil casing annulus into two parts. The present invention combines the inverted cone and the three-stage separation system, enhances the oil-water separation efficiency through the internal flow channel, and realizes efficient oil-water two-phase separation.
Description
Technical Field
The invention relates to an underground oil-water separation device in the petrochemical field, in particular to an underground oil-water multistage cyclone purification device for same-well injection and production.
Background
Along with the increasing demand of petroleum, most of the oil fields on the land in China enter the middle and later stages of development, the water content of produced liquid is continuously increased, the treatment capacity of ground water treatment equipment cannot meet the actual demands, the existing separation system is difficult to reform due to space limitation, the development of marginal small-broken-block oil fields is gradually carried out, but the economic benefit of the exploitation of the marginal small-broken-block oil fields is improved due to low productivity, small number of wells, large well spacing, quick water breakthrough of the oil wells and short oil production period, so that the design of a high-efficiency hydrocyclone is necessary. In the prior art, the underground multistage cyclone coalescence oil-water separation device can improve the oil-water separation efficiency through 2-stage separation, but has a plurality of defects, firstly, the separation effect is imperfect because only the primary cyclone is provided with the back taper, secondly, the problems that oil attached to the back taper and some oil which is not separated near the back taper cannot be solved, and finally, the total length of the back taper cannot be changed can not be solved, and the expected separation effect cannot be achieved if a working condition requiring a long back taper or a short back taper is met. The invention solves the problem by using the modularized design, which needs the multi-stage rotational flow purification device for the underground oil-water of the same well injection and production to realize the high-efficiency separation of the underground oil-water medium.
Disclosure of Invention
The invention aims to provide a multi-stage cyclone purifying device for oil and water in a same-well injection and production well, which is used for solving the problems that in the prior art, the separation effect of an underground oil-water separating device is imperfect and oil attached to a back taper and some unseparated oil near the back taper cannot be solved.
The technical scheme adopted for solving the technical problems is that the multi-stage rotational flow purification device for the oil-water under the same well injection and production well comprises a main shell, an end cover, a first-stage rotational flow module, a second-stage rotational flow module and a third-stage rotational flow module, wherein the first-stage rotational flow module, the second-stage rotational flow module and the third-stage rotational flow module are sequentially connected from top to bottom and are arranged in the main shell to form a three-stage variable-size composite inverted cone type oil-water separation device, the end cover is arranged at the upper port of the main shell, the end cover is provided with an oil phase outlet, and outer feed inlets are uniformly distributed at the upper end of the main shell; the first-stage rotational flow module comprises an outer bridge type channel, a first-stage shell, a first-stage spiral channel, a first-stage back taper and a first-stage inner bridge type channel, wherein the first-stage spiral channel and the first-stage back taper are arranged in the first-stage shell at intervals, a clearance channel is arranged between the first-stage spiral channel and an end cover, the first-stage spiral channel is provided with a central hole, the lower end of the first-stage shell is connected with the first-stage inner bridge type channel, the upper end of the first-stage inner bridge type channel is welded with the bottom section of the first-stage back taper, and the first-stage inner bridge type channel is provided with a first-stage oil phase converging inlet communicated with an oil jacket annulus;
The first-stage rotational flow module is connected with the second-stage rotational flow module through a first-stage internal bridge type channel, the second-stage rotational flow module is connected with the third-stage rotational flow module through a second-stage internal bridge type channel, the third-stage spiral flow channel of the third-stage rotational flow module is provided with an annular sealing plate, the annular sealing plate is provided with external threads, the annular sealing plate is in threaded connection with the main shell, and the annular sealing plate divides an oil jacket annulus formed among the first-stage rotational flow module, the second-stage rotational flow module, the third-stage rotational flow module and the main shell into two parts.
The secondary rotational flow module comprises a secondary shell, a secondary spiral flow passage, a secondary back taper and a secondary internal bridge type passage, wherein the secondary spiral flow passage and the secondary back taper are arranged in the secondary shell at intervals, the secondary spiral flow passage is provided with a central hole, the secondary internal bridge type passage is provided with a secondary oil phase converging inlet communicated with an oil jacket annulus, the secondary internal bridge type passage is also provided with a secondary mixed phase passage and a secondary oil phase passage, the secondary spiral flow passage is connected with the primary internal bridge type passage through welding, the secondary shell is connected with the secondary spiral flow passage through threaded connection, the secondary internal bridge type passage is connected with the secondary shell through threaded connection, the upper end of the secondary internal bridge type passage is connected with the bottom section of the secondary back taper through welding, and the lower end of the secondary internal bridge type passage is connected with the tertiary spiral flow passage through welding.
The three-level rotational flow module in the scheme comprises a three-level shell, a three-level spiral flow channel and a three-level back taper, wherein the three-level spiral flow channel and the three-level back taper are arranged in the three-level shell at intervals, the three-level spiral flow channel is provided with a center hole, the three-level spiral flow channel is connected with the three-level shell through threads, the three-level spiral flow channel is connected with a two-level inner bridge type channel through welding, and the bottom section of the three-level back taper is connected with the three-level shell through welding.
According to the scheme, the first-stage inverted cone, the second-stage inverted cone and the third-stage inverted cone are formed by mutually connecting multiple sections of inverted cone sections through clamping rings, each section of inverted cone section is formed by integrating a diversion platform, a cone body and diversion grooves, the diversion platform is in a cone-table shape, corrugated edges are uniformly distributed on the whole body of the cone, the clamping rings are arranged on the top of the diversion platform, the diversion grooves are cone-table-shaped grooves at the bottom of the cone body, corrugated grooves are uniformly distributed on the whole body of the inner wall of each cone-table-shaped groove, each diversion groove is provided with a clamping ring groove, the diversion platform and the cone body are internally provided with an axial main cone runner, two adjacent inverted cone sections are inserted into the diversion grooves through the diversion platform and the clamping rings are connected in the clamping ring grooves, after each corrugated edge is inserted into the corresponding corrugated groove, the corrugated edge is connected with one diversion runner, and each diversion runner is connected with the main cone runner through one branch runner in the cone.
In the scheme, the primary inner bridge type channel comprises an outer cylinder and an inner column which are coaxially arranged, the primary outer cylinder is in threaded connection with an annular space between the outer cylinder and the inner column, a top plate of the secondary spiral channel is fixed with the outer cylinder and seals the bottom of the annular space, a primary oil phase channel in the inner column is communicated with the annular space, the annular space is communicated with a primary oil phase inlet, a primary mixed phase channel is further arranged on the inner column, the primary oil phase channel is communicated with a central hole of the secondary spiral channel through a central hole of the top plate of the secondary spiral channel, and the primary mixed phase channel is communicated with the secondary outer cylinder through a central hole of the top plate of the secondary spiral channel.
The primary spiral flow channel is connected with the primary shell through threads, the primary inverted cone is formed by interconnecting a primary inverted cone top section, a primary inverted cone upper cone section, a primary inverted cone middle cone section, a primary inverted cone lower cone section, a primary inverted cone column top, a primary inverted cone upper column section, a primary inverted cone middle column section, a primary inverted cone lower column section, a primary inverted cone column section bottom and a primary inverted cone bottom section through corresponding clamping rings and clamping ring grooves, and the primary inner bridge type channel is connected with the secondary spiral flow channel through welding.
The secondary back taper in the scheme is formed by connecting a secondary back taper top section, a secondary back taper upper taper section, a secondary back taper middle taper section, a secondary back taper lower taper section, a secondary back taper column section top, a secondary back taper upper column section, a secondary back taper middle column section, a secondary back taper lower column section, a secondary back taper column section bottom and a secondary back taper bottom section through a clamping ring.
The three-stage back taper in the scheme is formed by connecting a three-stage back taper top section, a three-stage back taper upper taper section, a three-stage back taper middle taper section, a three-stage back taper lower taper section, a three-stage back taper column section top, a three-stage back taper upper column section, a three-stage back taper middle column section, a three-stage back taper lower column section, a three-stage back taper column section bottom and a three-stage back taper bottom section through clamping rings.
In the scheme, an oil sleeve annulus corresponding to the primary rotational flow module and the secondary rotational flow module, an oil phase channel of the outer bridge type channel, a clearance channel between the primary spiral channel and the end cover and an oil phase outlet form an oil liquid uplink channel.
Advantageous effects
1. The invention relates to a three-stage flow dividing device with variable size, which is characterized in that oil-water two phases are subjected to primary separation of primary rotational flow, secondary rotational flow is separated again, oil is led into an oil phase outlet through an oil liquid ascending channel after final separation of three-stage rotational flow, and water is discharged from a water phase outlet, so that the separation efficiency is greatly improved.
2. According to the invention, through the bridge channel, the oil phase separated for multiple times can be transported to the oil phase outlet in a converging way.
3. According to the invention, after the oil-water two phases are subjected to cyclone separation, some oil phases which are not separated are attached to the inverted cone and are sucked into the internal flow channel through the flow channel opening between the cone section and the column section, so that the oil phases are discharged through the oil phase outlet, and the effect of improving the separation efficiency is achieved.
4. The invention designs the back taper structure into modularization, and can achieve the purpose of controlling the total length of the back taper by increasing or reducing the number of the column sections so as to adapt to different working conditions and achieve the optimal separation efficiency.
5. The invention has the advantages of high separation efficiency, strong applicability and the like, can realize the efficient separation of the oil-water two-phase medium under various working conditions, greatly improves the economic benefit, and simultaneously ensures that the device has universality through modularized design, and is convenient for optimization so as to adapt to specific working conditions to realize optimal separation efficiency. Is a multiphase medium high-efficiency separation device suitable for underground.
6. In order to solve the technical problems in the background art, the invention provides the multi-stage rotational flow purification device for the underground oil and water of the same well injection and production, the oil-water mixed phase can be separated for a plurality of times through the novel three-stage variable-size cyclone, and the novel inverted cone in the interior can suck the oil phase attached to the inverted cone into the central flow channel (the main flow channel in the cone) so as to enable the oil phase to enter the inner rotational flow, thereby realizing the efficient separation of the oil phase and the water phase.
7. The oil-water two-phase high-efficiency separation device has a simple structure and high separation efficiency, has a modularized design, can realize the high-efficiency separation of multiple media under various different working conditions, and is suitable for the field of underground oil-water separation.
Drawings
FIG. 1 is a view showing the overall appearance and cross section of the present invention.
Fig. 2 is an external view of a primary cyclone module, a secondary cyclone module, and a tertiary cyclone module.
FIG. 3 is a cross-sectional view and a partial enlarged view of a primary cyclone module.
Fig. 4 is a partial exploded view of a primary cyclone module.
Fig. 5 is an overall appearance, partial cross-section and exploded view of a primary swirl module back taper.
Fig. 6 is an overall appearance and cross-sectional view of a two-stage swirl module.
Fig. 7 is an exploded view of a secondary cyclone module.
FIG. 8 is an overall appearance and cross-sectional view of a three stage swirl module.
Fig. 9 is an exploded view of a three stage swirl module.
In the figure, 1-stage cyclone module, 101-main shell, 1011-outer feed inlet, 102-end cover, 1021-oil phase outlet, 103-outer bridge channel, 1031-feed channel, 1032-oil phase channel, 104-stage spiral flow channel, 105-stage shell, 1051-inner feed inlet, 106-stage inverted cone top section, 107-stage inverted cone upper cone section, 108-stage inverted cone middle cone section, 1081-clamp ring, 1082-guide table, 1083-cone inner main flow channel, 1084-clamp ring, 1085-cone inner branch flow channel, 1086-guide groove, 109-stage inverted cone lower cone section, 110-stage inverted cone column section top, 111-stage inverted cone upper column section, 112-stage inverted cone middle column section, 113-stage inverted cone lower column section, 114-stage inverted cone column section bottom, 115-primary back taper bottom section, 116-primary inner bridge channel, 1161-primary oil phase channel, 1162-primary oil phase mixing inlet, 1163-primary mixed phase channel, 2-secondary rotational flow module, 201-secondary spiral channel, 202-secondary shell, 203-secondary back taper top section, 204-secondary back taper top section, 205-secondary back taper middle section, 206-secondary back taper bottom section, 207-secondary back taper column top, 208-secondary back taper top column section, 209-secondary back taper middle column section, 210-secondary back taper bottom column section, 211-secondary back taper column bottom, 212-secondary back taper bottom section, 213-secondary inner bridge channel, 2131-secondary oil phase channel, 2132-secondary oil phase mixing inlet, 2133-secondary mixed phase channel, the three-level cyclone module comprises a 3-level cyclone module, a 301-level spiral flow channel, a 302-level shell, a 303-level inverted cone top section, a 304-level inverted cone upper cone section, a 305-level inverted cone middle cone section, a 306-level inverted cone lower cone section, a 307-level inverted cone column section top, a 308-level inverted cone upper column section, a 309-level inverted cone middle column section, a 310-level inverted cone lower column section, a 311-level inverted cone column section bottom and a 312-level inverted cone bottom section.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
The whole appearance and the cross section of the same-well injection-production underground oil-water multistage cyclone purification device are shown in fig. 1, the same-well injection-production underground oil-water multistage cyclone purification device comprises a main shell 101, an end cover 102, a first-stage cyclone module 1, a second-stage cyclone module 2 and a third-stage cyclone module 3, wherein the first-stage cyclone module 1, the second-stage cyclone module 2 and the third-stage cyclone module 3 are sequentially connected from top to bottom and are arranged in the main shell 101 to form a third-stage variable-size composite inverted cone type oil-water separation device, the end cover 102 is arranged at the upper port of the main shell 101, the end cover 102 is provided with an oil phase outlet 1021, and outer feed inlets 1011 are uniformly distributed at the upper end of the main shell; the gap runner is arranged between the primary spiral runner 104 and the end cover 102, the primary spiral runner 104 is provided with a central hole, the lower end of the primary shell 105 is connected with a primary inner bridge type channel 116, the upper end of the primary inner bridge type channel is welded with a primary inverted cone bottom section 115, the primary inner bridge type channel is provided with a primary oil phase converging inlet 1162 communicated with an oil jacket annulus, the outer bridge type channel 103 is cylindrical, radial feeding channels 1031 are uniformly arranged on the circumference of the wall of the outer bridge type channel, oil phase channels 1032 are uniformly arranged on the wall of the outer bridge type channel along the axial direction, the outer bridge type channel is in threaded connection with the main shell and is positioned between the main shell and the outer side of the primary shell, the outer bridge type channel is tightly matched with the primary shell, the primary shell is uniformly provided with an inner feeding inlet 1051, and the outer feeding inlets, the feeding channels and the inner feeding inlets are in one-to-one correspondence.
The primary cyclone module 1 is connected with the secondary cyclone module 2 through the primary inner bridge type channel 116, the secondary cyclone module 2 is connected with the tertiary cyclone module 3 through the secondary inner bridge type channel 213, the tertiary spiral flow channel 301 of the tertiary cyclone module 3 is provided with an annular sealing plate, the annular sealing plate is provided with external threads and is in threaded connection with the main shell, and the annular sealing plate separates an oil jacket annulus formed among the primary cyclone module 1, the secondary cyclone module 2 and the tertiary cyclone module 3 and the main shell 101 into two parts. The oil sleeve annulus corresponding to the primary rotational flow module 1 and the secondary rotational flow module 2, the oil phase channel of the outer bridge channel 103, the clearance channel between the primary spiral channel 104 and the end cover 102 and the oil phase outlet 1021 form an oil liquid uplink channel.
The primary inner bridge channel 116 comprises an outer cylinder and an inner column which are coaxially arranged, the primary outer shell 105 is in threaded connection with an annular space between the outer cylinder and the inner column, a top plate of the secondary spiral channel 201 is fixed with the outer cylinder and seals the bottom of the annular space, a primary oil phase channel 1161 in the inner column is communicated with the annular space, the annular space is communicated with a primary oil phase inlet 1162, a primary mixed phase channel 1163 is further arranged on the inner column, the primary oil phase channel 1161 is communicated with a central hole of the secondary spiral channel through a central hole of the top plate of the secondary spiral channel, and the primary mixed phase channel 1163 is communicated with the secondary outer shell through a central hole of the top plate of the secondary spiral channel.
The device is vertically placed underground, and in the working process, the oil-water mixture firstly starts to flow in from the outer feed inlet 1011, then passes through the feed channel 1031 of the outer bridge channel 103, and finally enters the primary cyclone through the inner feed inlet 1051. After passing through the first-stage spiral flow passage 104, sufficient tangential velocity is obtained, primary separation is carried out in the first-stage casing 105, part of oil phase is separated and discharged through an oil phase outlet 1021, some oil phase which is not separated in the center is attached to the inverted cone and is sucked into the in-cone branch flow passage 1085 by the guide groove 1086 between the cone section and the column section, then enters the in-cone main flow passage 1083 and is discharged from the top, finally enters the inner rotation flow and is discharged through the oil phase outlet 1021, and the first-stage separation process is carried out. The rest of the mixed phase which enters the bottom flow port and is not separated enters the secondary rotational flow module 2 from the primary mixed phase channel 1163 in the primary inner bridge channel 116, then enters the secondary spiral flow channel 201, obtains enough tangential velocity, is separated again in the secondary shell 202, the central hole of the secondary spiral flow channel 201 is connected with the primary oil phase channel 1161 in the primary inner bridge channel 116, part of the oil phase is separated and passes through the primary oil phase channel 1161 in the primary inner bridge channel 116, then enters the oil sleeve annulus through the primary oil phase converging inlet, so that the oil phase channel 1032 in the outer bridge channel 103 and the oil phase which is separated before are converged and discharged from the oil phase outlet 1021, some oil phases which are not separated in the center are attached to the back taper, are sucked into the branch flow channel between the taper section and the column section, then enter the primary flow channel in the taper and are discharged from the top, then enter the inner rotational flow through the primary oil phase channel 1161 in the primary inner bridge channel 116, and finally enter the oil sleeve annulus through the oil phase converging inlet, thus being a secondary separation process. The remaining part of the unseparated mixed phase enters the three-stage rotational flow module 3 from the two-stage mixed phase channel 2133 in the two-stage inner bridge channel 213, and then enters the three-stage spiral flow channel 301 to obtain enough tangential velocity, and finally separates in the three-stage shell 302, and part of the oil phase is separated and enters the oil sleeve annulus through the two-stage oil phase channel 2131 in the two-stage inner bridge channel 213, and then enters the oil sleeve annulus through the two-stage oil phase collecting inlet 2132, so that the oil phase channel 1032 in the outer bridge channel 103 and the oil phase separated before are converged and discharged from the oil phase outlet 1021, and some of the unseparated oil phase is attached to the inverted cone, is sucked into the inner branch flow channel by the guide grooves between the cone section and the column section, then enters the inner main cone flow channel and is discharged from the top, and then enters the inner rotational flow and enters the oil sleeve annulus through the two-stage oil phase collecting inlet 2132, and is a three-stage separation process.
The explosion diagram of the same-well injection and production underground oil-water multistage cyclone purification device is shown in fig. 2, and the same-well injection and production underground oil-water multistage cyclone purification device consists of a first-stage cyclone module 1, a second-stage cyclone module 2 and a third-stage cyclone module 3.
As shown in fig. 3, the sectional view and the partial enlarged view of the primary cyclone module are shown, and the oil-water mixture enters the primary cyclone from the outer feed inlet 1011 through the feed channel 1031 in the outer bridge channel 103, further enters the primary cyclone from the inner feed inlet 1051, and obtains enough tangential velocity after passing through the primary spiral channel 104, and preliminary separation is performed in the primary shell 105, part of the oil phase is separated and discharged through the oil phase outlet 1021, and some oil phase which is not separated is attached to the back taper, is sucked in by the channel between the taper section and the column section and is discharged from the top, so that the oil phase enters the inner cyclone and is discharged through the oil phase outlet 1021. The remaining portion of the unseparated mixed phase enters the next stage separation from the stage mixed phase channel 1163 in the stage internal bridge channel 116.
The partial explosion diagram of the primary cyclone module is shown in fig. 4, and comprises an outer bridge channel 103 and a primary spiral flow channel 104, wherein a feed channel 1031 and an oil phase channel 1032 are arranged on the outer bridge channel 103, so that separated oil phase and mixed oil phase are not interfered with each other. The first-stage inverted cone, the second-stage inverted cone and the third-stage inverted cone are formed by mutually connecting multiple sections of inverted cone sections through clamping rings 1081, each section of inverted cone section is formed by integrating a guide table 1082, a cone body and guide grooves, the guide table is in a cone table shape, corrugated edges are uniformly distributed on the whole body of the cone table, the clamping rings 1081 are arranged on the top of the guide table, the guide grooves 1086 are cone table-shaped grooves at the bottom of the cone body, corrugated grooves are uniformly distributed on the whole body of the inner wall of each cone table-shaped groove, the guide grooves are provided with clamping ring grooves 1084, the guide table and the cone body are internally provided with axial main channels 1083, two adjacent inverted cone sections are connected with each other in the clamping ring grooves by inserting the guide table into the guide grooves, and after each corrugated edge is inserted into the corresponding corrugated groove, the corrugated edge is connected with one guide channel with the corrugated groove, and each guide channel is connected with the main channels 1083 through one sub-channel 1085 in the cone. The overall appearance, partial section and explosion diagram of the primary rotational flow module back taper are shown in fig. 5, and the primary back taper top section 106, the primary back taper upper taper section 107, the primary back taper middle taper section 108, the primary back taper lower taper section 109, the primary back taper column section top 110, the primary back taper upper column section 111, the primary back taper middle column section 112, the primary back taper lower column section 113, the primary back taper column section bottom 114 and the primary back taper bottom section 115 are connected with each other through a clamping ring 1081 and a clamping ring groove 1084. Some of the oil phase which is not separated adheres to the back taper, is sucked into the in-taper branch flow passage 1085 by the flow guide groove 1086 between the taper section and the column section, and then enters the in-taper main flow passage 1083 and is discharged from the top.
The overall appearance and cross-sectional view of the secondary cyclone module is shown in fig. 6, some of the non-separated mixed phases enter the secondary spiral flow channel 201 to obtain enough tangential velocity, re-separate in the secondary housing 202, some of the non-separated oil phases adhere to the back taper, are sucked into the inner branch flow channel by the flow guide grooves between the taper sections and the column sections, enter the inner main flow channel and are discharged from the top, and the rest of the non-separated mixed phases enter the next stage from the secondary inner bridge channel 213.
As shown in fig. 7, a part of the unseparated mixed phase enters the three-stage cyclone module 3 from the two-stage mixed phase channel 2133 in the two-stage inner bridge channel 213, and part of the oil phase of the three-stage cyclone module 3 is separated through the two-stage oil phase channel 2131 in the two-stage inner bridge channel 213 and then enters the oil jacket annulus through the two-stage oil phase collecting inlet 2132. The secondary back taper top section 203, the secondary back taper upper cone section 204, the secondary back taper middle cone section 205, the secondary back taper lower cone section 206, the secondary back taper column section top 207, the secondary back taper upper column section 208, the secondary back taper middle column section 209, the secondary back taper lower column section 210, the secondary back taper column section bottom 211 and the secondary back taper bottom section 212 are all connected with each other through a clamping ring, some oil phases which are not separated are attached to the back taper, are sucked into the inner branch flow passage by the diversion trench between the cone section and the column section, and enter the inner main flow passage and are discharged from the top.
The overall appearance and the cross section of the three-stage rotational flow module 3 are shown in fig. 8, and the three-stage back taper consists of a three-stage back taper top section 303, a three-stage back taper upper taper section 304, a three-stage back taper middle taper section 305, a three-stage back taper lower taper section 306, a three-stage back taper column section top 307, a three-stage back taper upper column section 308, a three-stage back taper middle column section 309, a three-stage back taper lower column section 310, a three-stage back taper column section bottom 311 and a three-stage back taper bottom section 312. Some of the non-separated mixed phases enter the three-stage spiral flow channel 301 to obtain sufficient tangential velocity, and finally are separated in the three-stage shell 302, part of the oil phase is separated into the two-stage inner bridge type channel 213, some of the non-separated oil phase is attached to the back taper, is sucked into the inner branch flow channel by the diversion trench between the taper section and the column section, enters the inner main flow channel of the taper and is discharged from the top, so that the oil phase enters the inner rotation flow and finally enters the two-stage inner bridge type channel 213. The explosion diagram of the three-stage cyclone module is shown in fig. 9, some oil phases which are not separated are attached to the inverted cone, are sucked into the inner branch flow channel of the cone by the diversion trench between the cone section and the column section, and then enter the inner main flow channel of the cone and are discharged from the top.
The device has compact design structure. The oil phase and the water phase are primarily separated by the first-stage spiral flow passage, the mixed phase with a small amount of oil in the separated underflow port is gathered at the bottom of the hydrocyclone and enters the second-stage spiral flow separation through the bridge type passage, the oil phase is gathered above the first-stage hydrocyclone and enters the oil phase outlet for discharging, the oil phase on the inverted conical surface and the oil phase which does not enter the internal rotation flow are sucked into the central flow passage in the inverted conical surface by the flow passage in the inverted conical surface and are transported upwards to the internal rotation flow to be finally discharged from the oil phase outlet, the mixed phase which is not completely separated by the second-stage variable-size cyclone separator enters the third-stage cyclone module for re-separation, the separated oil phase enters the oil sleeve annulus through the bridge type passage and is finally discharged from the oil phase outlet, and the oil phase which is not completely separated by the first two stages enters the oil sleeve annulus through the bridge type passage and is finally discharged from the oil phase outlet. The invention can realize the step-by-step high-efficiency separation of the oil-water two-phase medium, greatly improves the economic benefit, and simultaneously greatly improves the separation performance of the device by the design of the multi-stage separation, the special inverted cone structure and the special flow passage. The efficient multiphase medium separating device is suitable for underground multiphase medium, has high working efficiency and good separating effect, is favorable for sustainable development of oil fields, and has higher practicability.
According to the three cyclone modules, oil-water separation is carried out to the bottom through the spiral flow channel and the specially designed inverted cone inner central flow channel. The primary, secondary and final separation are respectively completed in a primary rotational flow module, a secondary rotational flow module and a tertiary rotational flow module, and are connected through a bridge channel. The oil phase gathers above each stage of cyclone and enters an oil phase outlet to be discharged, part of the mixed phase which is not completely separated is attached to the inverted cone, the oil phase is sucked in through a flow channel and transported upwards to the internal rotation, and then the oil phase is discharged through the oil phase outlet. The aqueous phase is collected at the bottom of the cyclone and discharged. According to the invention, the inverted cone and the three-stage separation system are innovatively used, so that the oil-water separation efficiency is further enhanced through the internal flow channel, and the efficient oil-water two-phase separation is realized.
Claims (7)
1. The multi-stage cyclone purifying device for the oil-water in the same-well injection production well is characterized by comprising a main shell, an end cover, a first-stage cyclone module, a second-stage cyclone module and a third-stage cyclone module, wherein the first-stage cyclone module, the second-stage cyclone module and the third-stage cyclone module are sequentially connected from top to bottom and are arranged in the main shell to form a three-stage variable-size composite inverted cone type oil-water separating device; the first-stage rotational flow module comprises an outer bridge type channel, a first-stage shell, a first-stage spiral channel, a first-stage back taper and a first-stage inner bridge type channel, wherein the first-stage spiral channel and the first-stage back taper are arranged in the first-stage shell at intervals, a clearance channel is arranged between the first-stage spiral channel and an end cover, the first-stage spiral channel is provided with a central hole, the lower end of the first-stage shell is connected with the first-stage inner bridge type channel, the upper end of the first-stage inner bridge type channel is welded with the bottom section of the first-stage back taper, and the first-stage inner bridge type channel is provided with a first-stage oil phase converging inlet communicated with an oil jacket annulus;
The first-stage cyclone module is connected with the second-stage cyclone module through a first-stage inner bridge type channel, the second-stage cyclone module is connected with the third-stage cyclone module through a second-stage inner bridge type channel, a third-stage spiral flow channel of the third-stage cyclone module is provided with an annular sealing plate, the annular sealing plate is provided with external threads, the annular sealing plate is in threaded connection with the main shell, and the annular sealing plate divides an oil jacket annulus formed among the first-stage cyclone module, the second-stage cyclone module, the third-stage cyclone module and the main shell into two parts;
the secondary rotational flow module comprises a secondary shell, a secondary spiral flow passage, a secondary inverted cone and a secondary internal bridge type passage, wherein the secondary spiral flow passage and the secondary inverted cone are arranged in the secondary shell at intervals, the secondary spiral flow passage is provided with a central hole, the secondary internal bridge type passage is provided with a secondary oil phase converging inlet communicated with an oil jacket annulus, and is also provided with a secondary mixed phase passage and a secondary oil phase passage;
the three-stage rotational flow module comprises a three-stage shell, a three-stage spiral flow passage and a three-stage back taper, wherein the three-stage spiral flow passage and the three-stage back taper are arranged in the three-stage shell at intervals, the three-stage spiral flow passage is provided with a center hole, the three-stage spiral flow passage is connected with the three-stage shell through threads, the three-stage spiral flow passage is connected with a two-stage inner bridge type channel through welding, and a three-stage back taper bottom section is connected with the three-stage shell through welding.
2. The multi-stage rotational flow purification device for the downhole oil and water injection and production of the same well according to claim 1 is characterized in that the primary inverted cone, the secondary inverted cone and the tertiary inverted cone are formed by mutually connecting a plurality of sections of inverted cone sections through clamping rings, each section of inverted cone section is formed by integrating a diversion platform, a cone body and a diversion trench, the diversion platform is in a cone-shaped structure, corrugated edges are uniformly distributed on the whole body of the cone, the clamping rings are arranged at the top of the diversion platform, the diversion trench is a cone-shaped groove at the bottom of the cone body, corrugated grooves are uniformly distributed on the whole body of the inner wall of the cone-shaped groove, the diversion trench is provided with a clamping ring groove, the diversion platform and the cone body are internally provided with axial main flow channels, the two adjacent inverted cone sections are connected with each other in the clamping ring groove through inserting the diversion platform into the diversion trench, and after each corrugated edge is inserted into the corresponding corrugated groove, the corrugated edge and the corrugated groove form a diversion flow channel, and each diversion flow channel is connected with the main flow channel in the cone through one branch flow channel.
3. The multi-stage cyclone purification device for underground oil and water injection and production in the same well according to claim 2, wherein the primary inner bridge type channel comprises an outer cylinder and an inner column which are coaxially arranged, the primary outer shell is in threaded connection with an annular space between the outer cylinder and the inner column, a top plate of the secondary spiral channel is fixed with the outer cylinder and seals the bottom of the annular space, a primary oil phase channel in the inner column is communicated with the annular space, the annular space is communicated with a primary oil phase inlet, the inner column is also provided with a primary mixed phase channel, the primary oil phase channel is communicated with a central hole of a top plate of the secondary spiral channel through a central hole of the top plate of the secondary spiral channel, and the primary mixed phase channel is communicated with the secondary outer shell through a central hole of the top plate of the secondary spiral channel.
4. The multi-stage rotational flow purification device for underground oil and water in the same well injection and production well, which is characterized in that the primary spiral flow passage is connected with a primary shell through threads, the primary inverted cone is formed by a primary inverted cone top section, a primary inverted cone upper cone section, a primary inverted cone middle cone section, a primary inverted cone lower cone section, a primary inverted cone column section top, a primary inverted cone upper column section, a primary inverted cone middle column section, a primary inverted cone lower column section, a primary inverted cone column section bottom and a primary inverted cone bottom section through corresponding snap rings and snap ring grooves, and the primary inner bridge passage is connected with the secondary spiral flow passage through welding.
5. The multi-stage rotational flow purification device for underground oil and water of the same well injection and production well according to claim 4, wherein the secondary back taper is formed by connecting a secondary back taper top section, a secondary back taper upper taper section, a secondary back taper middle taper section, a secondary back taper lower taper section, a secondary back taper column section top, a secondary back taper upper column section, a secondary back taper middle column section, a secondary back taper lower column section, a secondary back taper column section bottom and a secondary back taper bottom section through clamping rings.
6. The multi-stage rotational flow purification device for underground oil and water of the same well injection production well according to claim 5, wherein the three-stage back taper is formed by mutually connecting a three-stage back taper top section, a three-stage back taper upper taper section, a three-stage back taper middle taper section, a three-stage back taper lower taper section, a three-stage back taper column section top, a three-stage back taper upper column section, a three-stage back taper middle column section, a three-stage back taper lower column section, a three-stage back taper column section bottom and a three-stage back taper bottom section through clamping rings.
7. The multi-stage cyclone purification device for downhole oil and water injection and production in the same well as in claim 6, wherein the oil jacket annular space corresponding to the primary cyclone module and the secondary cyclone module, the oil phase channel of the outer bridge type channel, the clearance channel between the primary spiral channel and the end cover and the oil phase outlet form an oil ascending channel.
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| JP2015010542A (en) * | 2013-06-28 | 2015-01-19 | ダイハツ工業株式会社 | Cylinder head for internal combustion engine |
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| CN104667579B (en) * | 2015-02-09 | 2017-02-22 | 华东理工大学 | Method and device for strengthening oil-water separation and coupled desalting functions in cold low pressure separator |
| CN106089621B (en) * | 2016-07-19 | 2019-01-08 | 浙江工业大学 | Two-dimentional cone roller piston pump |
| CN206240118U (en) * | 2016-12-08 | 2017-06-13 | 东北石油大学 | A kind of underground two-stage oily-water seperating equipment |
| CN115788396B (en) * | 2022-12-28 | 2025-08-12 | 东北石油大学 | Downhole oil-water cyclone separation assembly and device and method using same |
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| US6682633B1 (en) * | 2000-12-22 | 2004-01-27 | Uop Llc | Apparatus for cocurrent fractional distillation |
| JP2015010542A (en) * | 2013-06-28 | 2015-01-19 | ダイハツ工業株式会社 | Cylinder head for internal combustion engine |
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