CN217582102U - Rotational flow sand removing device for electric submersible pump and well fluid treatment system - Google Patents

Abstract

The utility model discloses a whirl sand removal device and well fluid processing system for diving oily charge pump, the device includes: when the inner pipe rotates, the spiral protrusions arranged on the outer edge of the inner pipe generate centrifugal force, impurities (such as sand) with large mass are always located on the periphery of the rotational flow and gradually descend under the action of gravity, well fluid without impurities in the center of the rotational flow enters a cavity in the middle of the inner pipe through the drainage port and is then lifted upwards, the well fluid without impurities is continuously sucked away, so that a cavity between the inner pipe and the outer pipe is continuously vacant, and the well fluid outside the outer pipe is sucked into the cavity between the outer pipe and the inner pipe through the suction port to fill the vacancy and continuously circulates; and the constantly declining impurity will be collected by the tail pipe, and then centralized processing, so the utility model provides a whirl degritting device for diving oily charge pump can not be with impurity discharge outer tube outside to solve impurity and get into well liquid processing system's problem again after being discharged.

Description

Rotational flow sand removing device for electric submersible pump and well fluid treatment system

Technical Field

The utility model relates to an oil development technical field especially relates to a whirl sand removing device and well fluid processing system for diving oily charge pump.

Background

The oil-gas separator of submersible electric pump is an important component of electric pump set, and can transfer power, separate free gas in oil well and raise pumping efficiency of the set. Because the well fluid is complex in composition, besides oil, water and gas, other impurities such as mud, formation sand and formation debris are often accompanied, and after the substances flow through the separator, the substances cause uneven centrifugal force and aggravation of vibration, and meanwhile, friction pairs and shaft accessories are abraded, even the centrifugal pump is influenced, and the whole unit is damaged.

In order to solve the technical problem, the utility model with application number 2013204521812 discloses a sand-proof and wear-resistant separator of an electrical submersible pump, which comprises a separator shaft 1 and a separator shell 7 as shown in fig. 1; the upper end and the lower end of a separator shaft 1 are respectively sleeved with a hard alloy protective shaft sleeve I3 and a hard alloy protective shaft sleeve II 8, an induced separation rotor 6 is arranged between the hard alloy protective shaft sleeve I3 and the hard alloy protective shaft sleeve II 8 and sleeved on the separator shaft 1, an induced separation wheel rotor shell 5 is arranged in a separator shell 7, the separator shaft 1 penetrates through the separator shell 7, the upper end of the separator shell 7 is in threaded connection with an upper connector 2, the lower end of the separator shell 7 is in threaded connection with a lower connector 10, a hard alloy bushing I4 is arranged in the upper connector 2, a hard alloy bushing II 9 is arranged in the lower connector 10, the hard alloy bushing I4 and the hard alloy protective shaft sleeve I3 form a hard alloy friction pair, and the hard alloy bushing II 9 and the hard alloy protective shaft sleeve II 8 form a hard alloy friction pair.

Compared with the traditional sand removing device, the part material is improved by 2013204521812, the wear resistance of the sand removing device is improved to a certain extent by using a more wear-resistant material, but the structure is not improved, and the sand removing device still has the problem that the submersible electric pump is influenced by impurities and is easy to damage.

The utility model with application number 2021223567962 discloses a supporting device for protecting a separator of an electric submersible pump, which comprises a sand setting and throwing mechanism, a sand filtering and gas distributing mechanism and a separator gas distributing mechanism as shown in fig. 2; when the sand filtering and gas distributing mechanism is used, well liquid enters the sand filtering and gas distributing mechanism, the well liquid rotates along the annular space of the thin tube 23 and the tail tube 24 through the liquid inlet hole 22, sand with high density is separated out and sinks onto the piston 26 along the inner wall of the tail tube 24, when a sand column sinks onto the piston 26 to a certain height, the spring 27 is compressed, and the sand throwing hole 25 is opened to throw out the settled sand and drop into the well. Well fluid after sand separation enters the thin tube 23 downwards and is stressed to be opened through the hanging plate 21, the packer 20 and the rubber sleeve 19, and the well fluid is prevented from directly rising to the sand filtering and gas separating mechanism through the packer 20, the rubber sleeve 19, the reversing short section 17, the centralizer 16, the motor 15 and the motor protector 14.

Well liquid enters a sand filtering and gas distributing mechanism, the well liquid enters an inlet sieve tube 13, a rubber sleeve 12 is stressed to be stretched and attached to the wall of a sleeve, on one hand, the well liquid is prevented from eroding the wall of the sleeve and leaking out to deform and block the pump, on the other hand, the well liquid is prevented from directly going upwards, sand is filtered through an annular sieve plate 11, gas is distributed through a sheath 10, the distributed gas enters an oil sleeve ring on the pump through a gas outlet 7 and is empty, and the distributed well liquid passes through a precision sieve tube 9 to a liquid inlet 8 and rises to a separator gas distributing mechanism.

Well liquid enters a separator gas distribution mechanism, oil gas is separated through a spiral sheet 5 rotating through a rotating shaft 6, sand contained in the well liquid impacts a lining 4 along the spiral sheet 5 rotating at a high speed, and the separated oil gas enters a pump above an upper joint 1 and an oil pipe through a flow deflector 2 and is lifted to the ground.

Compared with the sand-proof and wear-resistant separator of the submersible electric pump disclosed by 2013204521812, the supporting device of the separator of the protective electric submersible pump disclosed by the utility model (2021223567962) can filter sand and other impurities out of a well fluid treatment system by utilizing the annular sieve plate through structural improvement, and can more effectively solve the problem that the sand and other impurities influence the submersible electric pump.

However, it should be noted that the sand and other impurities thrown out of the system are not effectively treated, and still near the submersible electric pump, and will re-enter the well fluid treatment system along with the well fluid, and need to be filtered again and thrown out of the well fluid treatment system again, and the circulation is repeated; and at any time, near the oily charge pump of diving sand and other impurity more and more, the work burden of sand removal device is bigger and bigger, and the filtering capacity of ring type sieve and accurate screen pipe will lose gradually, leads to using after the certain time, and sand removal device will thoroughly lose effect.

It is seen that there is a need for improvement and development in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a cyclone desanding device and a well fluid treatment system for an electrical submersible pump, which aims to solve the problems that in the desanding device of the prior art, sand and other impurities thrown out of the system are not effectively treated, and still in the vicinity of the electrical submersible pump, the sand and other impurities can enter the well fluid treatment system again along with the well fluid, and the sand and other impurities need to be filtered again and thrown out of the well fluid treatment system again, and the process is repeated; and at any time, the sand and other impurities near the submersible electric pump are more and more, the workload of the sand removing device is more and more, and the filtering capability of the annular sieve plate and the precise sieve tube is gradually lost, so that the sand removing device completely loses the function after being used for a certain time.

The utility model discloses technical scheme as follows:

a cyclone desanding device for an electric submersible pump, comprising: the outer edge of the inner pipe is provided with a spiral protrusion, the spiral protrusion is used for sucking well fluid into a space between the outer pipe and the inner pipe during rotation, and impurities in the well fluid are kept at the periphery of the well fluid by utilizing the generated centrifugal force; the outer pipe is provided with a suction inlet, the inner pipe is hollow and is provided with a drainage port, the drainage port is used for sucking the well fluid without impurities into the middle cavity, and the well fluid is lifted upwards along the axis of the cavity; the tail pipe is connected with the outer pipe and is positioned below the inner pipe and used for receiving impurities descending under the action of gravity.

The effect of above-mentioned scheme lies in: when the inner pipe rotates, the spiral bulge arranged on the outer edge of the inner pipe generates centrifugal force, impurities (such as sand) with large mass are always positioned on the periphery of the rotational flow and gradually descend under the action of gravity, the well fluid without impurities in the center of the rotational flow enters the cavity in the middle of the inner pipe through the drainage port and is then lifted upwards, the cavity between the inner pipe and the outer pipe continuously generates a gap as the well fluid without impurities is continuously sucked away, and the well fluid outside the outer pipe is sucked into the cavity between the outer pipe and the inner pipe through the suction port to fill the gap and continuously circulates; and the constantly declining impurity will be collected by the tail pipe, and then centralized processing, so the utility model provides a whirl degritting device for diving oily charge pump can not be with impurity discharge outer tube outside to solve impurity and get into well liquid processing system's problem again after being discharged.

In a further preferred scheme, the height of the suction port is higher than that of the drainage port, the upper end of the spiral bulge is lower than the suction port, and the lower end of the spiral bulge is higher than the drainage port.

The effect of above-mentioned scheme lies in: the height of the suction inlet is higher than that of the drainage port, so that the suction of well liquid containing impurities and the drainage of well liquid containing no impurities can be ensured without utilizing the high rotation of the spiral rotary bulge, and the rotation speed of the inner pipe can be freely controlled to adapt to different environments (the rotation speed can be controlled according to the sizes of sand grains and other solid particles so as to improve the collection efficiency of the impurities as much as possible); secondly, the fact that the upper end of the spiral rotating bulge is lower than the suction inlet means that the rotating speed of the well fluid at the suction inlet is lower than that at the spiral bulge, on one hand, the efficiency of a cavity between an inner pipe and an outer pipe for sucking the well fluid can be guaranteed, on the other hand, impurities on the outer side of the outer pipe can be sucked into the pipe and collected as much as possible, and the purification efficiency of a well fluid collection environment is improved; thirdly, the spiral raised lower end is higher than the drainage port, which means that the rotation speed of the well fluid at the drainage port is lower than that at the spiral raised position, so that on one hand, the efficiency of sucking the well fluid into the middle cavity of the inner pipe can be ensured, and on the other hand, after the well fluid without impurities is sucked into the middle cavity of the inner pipe, the impurities can sink to the tail pipe as soon as possible.

In a further preferred scheme, the suction inlet and the flow guide opening are both configured to be long-strip-shaped and are respectively arranged along the circumferential direction of the outer tube and the circumferential direction of the inner tube at intervals.

The effect of above-mentioned scheme lies in: on one hand, the long-strip-shaped liquid inlet can ensure the strength of the pipeline, and simultaneously, the length of the liquid inlet is prolonged, so that the flowing speed of the liquid can be effectively improved, and further, the exploitation efficiency of the purified well liquid is improved; on the other hand, the liquid inlets which are circumferentially arranged at intervals increase the number of the liquid inlets while ensuring the strength of the pipeline, and can also effectively improve the flowing speed of the liquid, thereby improving the exploitation efficiency of the purified well liquid.

In a further preferred scheme, a sealing ring is sleeved on the outer edge of the outer pipe, the sealing ring is located above the suction port, and the outer edge of the sealing ring abuts against the inner wall of the oil pipe.

The effect of above-mentioned scheme lies in: the arrangement of the sealing ring can prevent well fluid containing impurities from flowing upwards to the oil purifying area through a gap between the outer pipe and the oil pipe, so that finally collected oil is prevented from being polluted; the sealing ring is arranged above the suction inlet so as to ensure that the impurity-containing well fluid can smoothly enter the inner side of the outer pipe from the suction inlet.

In a further preferable scheme, the outer pipe is provided with a plurality of first exhaust holes, and the first exhaust holes are located above the suction inlet and below the sealing ring and used for exhausting gas contained in the well fluid.

The effect of above-mentioned scheme lies in: not only contain the solid impurity who uses sand as the owner in the well fluid that has not handled, still contain gaseous impurity such as gaseous impurity, gaseous impurity is because the quality is lighter, so it can not upwards promote after getting into from the water conservancy diversion mouth along with liquid hydrocarbon basically, if put to nothing, then gaseous impurity will form between inner tube and outer tube and pile up, form the potential safety hazard, so the utility model discloses a gaseous impurity that sets up in the first exhaust hole messenger well fluid above the sunction inlet rises and discharges to the outer tube in, prevents to highly hang down to lead to well fluid to flow out from first exhaust hole.

In further preferred scheme, the outer tube upper end is provided with first conical surface, first conical surface set up in the sealing washer top, and be provided with the second exhaust hole, the second exhaust hole is used for discharging gaseous impurity to the upper portion annular space.

The effect of above-mentioned scheme lies in: the first exhaust hole exhausts a part of gas impurities to the lower part of the sealing ring, the gas is mixed into the well fluid outside the outer pipe and possibly enters the outer pipe again, and if only the first exhaust hole is used, the gas impurities in the well fluid are increased; under this condition, the utility model discloses second exhaust hole has been set up in the top of sealing washer to the messenger is discharged the upper portion annular space to the sealing washer top through the gaseous impurity in second exhaust hole, carries out gaseous impurity's reposition of redundant personnel with this, has improved the more and more problem of gaseous impurity in the well fluid. The conical surface is arranged to form the second exhaust hole into a shape with a side bottom and an inner height, so that the exhausted gas can fill the whole upper annular space and reserve enough time for further exhausting of the gas.

In a further preferred scheme, the cyclone sand removing device for the electric submersible pump further comprises: the lower end of the air guide pipe is provided with a second conical surface, and the second conical surface is arranged above the first conical surface and is provided with an air suction hole; the upper end of the inner tube is communicated with a switching liquid guide tube, an air flow channel is arranged between the air guide tube and the switching liquid guide tube, and the air suction hole is communicated with the air flow channel.

The effect of above-mentioned scheme lies in: through air duct, second toper face, suction hole and gas flow channel's setting, the utility model provides a whirl sand removing device not only can gather the assigned position with the well liquid after purifying through the middle part cavity of inner tube, can also be with mixing the gas outgoing in well liquid, accomplishes solid-liquid-gas triphase separation.

In a further preferable scheme, the lower end of the inner pipe is in an inverted frustum shape with a smooth surface.

The effect of above-mentioned scheme lies in: because frustum shape structure sets up the lower extreme at the inner tube, so it is located the below of water conservancy diversion mouth, that is to say, the well liquid here does not need the whirl to carry out solid-liquid separation, makes solid impurity descend more fast under the action of gravity and is more favorable to the collection of solid impurity, nevertheless if make the inner tube cut off here suddenly, will cause the confusion of well liquid here. Therefore, the device is arranged at the lower end of the inner pipe, the surface of the device is smooth and is of an inverted frustum-shaped structure, the influence of the rotational flow on the well fluid can be gradually reduced, solid impurities in the well fluid are guided to rapidly descend and deposit to a tail pipe, and meanwhile the device cannot cause disorder of the well fluid due to the simultaneous effect of the rotational flow and the rotational flow which disappears suddenly.

In a further preferred scheme, the rotational flow sand removing device for the electric submersible pump is connected with an output shaft of the electric submersible pump, and exposed structural members are fixedly connected.

The effect of above-mentioned scheme lies in: the rotational flow sand removing device is connected with the output shaft of the electric submersible pump, which means that the rotational flow sand removing device does not need to be independently installed, extra workload cannot be increased, and the installation efficiency is higher compared with the sand removing device with a complex structure in the prior art; and the exposed structural parts are fixedly connected, which means that no movable part is arranged on the outer side, and the potential safety hazard that parts fall off does not exist.

A well fluid treatment system comprises the rotational flow sand removing device for the electric submersible pump and a sand treatment station, wherein the sand treatment station is connected with a tail pipe and is used for collecting and treating solid impurities discharged to the tail pipe by the rotational flow sand removing device. Because the well fluid treatment system includes all technical characteristics of above-mentioned whirl sand removal device for submersible electric pump, so well fluid treatment system also includes all technical effect of above-mentioned whirl sand removal device for submersible electric pump, no longer gives details.

Compared with the prior art, the utility model provides a whirl sand removing device for diving oily charge pump, include: the outer edge of the inner pipe is provided with a spiral protrusion, the spiral protrusion is used for sucking well fluid into a space between the outer pipe and the inner pipe when the inner pipe rotates, and impurities in the well fluid are kept at the periphery of the well fluid by utilizing the generated centrifugal force; the outer pipe is provided with a suction inlet, the inner pipe is hollow and is provided with a drainage port, the drainage port is used for sucking the well fluid without impurities into the middle cavity, and the well fluid is lifted upwards along the axis of the cavity; the tail pipe is connected with the outer pipe and is positioned below the inner pipe and used for receiving impurities descending under the action of gravity. When the inner pipe rotates, the spiral protrusion arranged at the outer edge of the inner pipe generates centrifugal force, impurities (such as sand) with large mass are always positioned at the periphery of the rotational flow and gradually descend under the action of gravity, the well liquid without impurities at the center of the rotational flow enters the cavity in the middle of the inner pipe through the drainage port and is then lifted upwards, and as the well liquid without impurities is continuously sucked away, a cavity between the inner pipe and the outer pipe is continuously vacant, and at the moment, the well liquid outside the outer pipe is sucked into the cavity between the outer pipe and the inner pipe through the suction port to fill the vacancy and continuously circulate; and the constantly declining impurity will be collected by the tail pipe, and then centralized processing, so the utility model provides a whirl degritting device for diving oily charge pump can not be with impurity discharge outer tube outside to solve impurity and get into well liquid processing system's problem again after being discharged.

Obviously, the rotational flow desanding device for the electric submersible pump is different from the prior art, solves the problems that in the desanding device in the prior art, sand and other impurities thrown out of the system are not effectively treated, and still near the electric submersible pump enter the well fluid treatment system again along with well fluid, and the well fluid needs to be filtered again and thrown out of the well fluid treatment system again, and is circulated and reciprocated; and at any time, the sand and other impurities near the submersible electric pump are more and more, the workload of the sand removing device is more and more, and the filtering capability of the annular sieve plate and the precise sieve tube is gradually lost, so that the sand removing device completely loses the function after being used for a certain time.

Drawings

Fig. 1 is a schematic structural diagram of the sand-prevention wear-resistant separator of the submersible electric pump provided by 2013204521812.

Fig. 2 is a schematic diagram of the configuration of the protective submersible pump separator kit provided in 2021223567962.

Fig. 3 is a schematic structural view of a cyclone sand removing device for an electrical submersible pump according to the present invention.

Fig. 4 is an exploded view of a cyclone sand removal device for an electric submersible pump according to the present invention.

Fig. 5 is a cross-sectional view of a cyclone sand removing device for an electrical submersible pump according to the present invention.

Fig. 6 is a schematic structural diagram of the outer pipe in the cyclone sand removing device for the electric submersible pump of the present invention.

Fig. 7 is a schematic view of the connection relationship between the outer pipe and the sealing ring in the cyclone sand removing device for the electric submersible pump of the present invention.

Fig. 8 is a schematic structural diagram of a cyclone sand removing device for an electric submersible pump according to a further preferred embodiment of the present invention.

Fig. 9 is a cross-sectional view of the air duct and the adapter catheter in the cyclone desanding device for the electrical submersible pump of the present invention.

Fig. 10 is a schematic structural diagram of an inner pipe in the cyclone sand removing device for the electric submersible pump of the present invention.

Detailed Description

The utility model provides a whirl sand-removing device and well liquid processing system for diving oily charge pump, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right to refer to the figure and to lift the example below the utility model discloses further detailed description.

As shown in fig. 3 to 5, the utility model provides a whirl sand removing device for diving oily charge pump, it includes: an outer pipe 100, an inner pipe 200 and a tail pipe 300, wherein the outer edge of the inner pipe 200 is provided with a spiral protrusion 220, as shown in fig. 4, the spiral protrusion 220 is used for sucking well fluid between the outer pipe 100 and the inner pipe 200 when rotating, and keeping impurities in the well fluid at the periphery of the well fluid by using the generated centrifugal force; the outer tube 100 is provided with a suction inlet 110, the inner tube 200 is hollow and provided with a drainage port 210, as shown in fig. 4 and 5, the drainage port 210 is used for sucking the well fluid without impurities into the middle cavity 230, as shown in fig. 5, the well fluid is lifted upwards along the axis of the cavity; the tail pipe 300 is connected to the outer pipe 100 and positioned below the inner pipe 200 to receive impurities descending by gravity.

The utility model provides an operation process that is used for latent oily charge pump's whirl sand removal device is: when the inner pipe 200 rotates, the spiral protrusion 220 arranged at the outer edge of the inner pipe will generate centrifugal force, impurities (such as sand) with larger mass will be always positioned at the periphery of the rotational flow and gradually fall under the action of gravity, the well fluid without impurities at the center of the rotational flow will enter the cavity at the middle part of the inner pipe 200 through the drainage port 210 and then be lifted upwards, as the well fluid without impurities is continuously sucked away, the cavity between the inner pipe 200 and the outer pipe 100 will continuously generate a gap, and at the moment, the well fluid outside the outer pipe 100 will be sucked into the cavity between the outer pipe 100 and the inner pipe 200 through the suction port 110 to fill the gap and continuously circulate; and the impurity that constantly descends will be collected by tail pipe 300, and then centralized processing, so the utility model provides a whirl grit removal device for diving oily charge pump can not be with impurity discharge outside outer tube 100 to solve impurity and get into well liquid processing system's problem again after being discharged.

Obviously, the rotational flow desanding device for the electric submersible pump is different from the prior art, solves the problems that in the desanding device in the prior art, sand and other impurities thrown out of the system are not effectively treated, and still near the electric submersible pump enter the well fluid treatment system again along with well fluid, and the well fluid needs to be filtered again and thrown out of the well fluid treatment system again, and is circulated and reciprocated; and at any time, the sand and other impurities near the submersible electric pump are more and more, the workload of the sand removing device is more and more, and the filtering capability of the annular sieve plate and the precise sieve tube is gradually lost, so that the sand removing device completely loses the function after being used for a certain time.

When the device is specifically implemented, the rotational flow sand removing device is arranged right below the electric submersible pump, and clean well liquid processed by the rotational flow sand removing device is lifted upwards through the electric submersible pump so as to carry out normal exploitation. The tail pipe 300 is connected to a sand treatment station that performs centralized treatment of solid impurities mainly including sand to prevent the solid impurities from re-entering the cyclone desanding apparatus. When the inner pipe 200 rotates, the outer pipe 100 and the inner pipe 200 do not rotate together, but the gap between the spiral protrusion 220 and the outer pipe 100 can be reduced as much as possible, so that the well fluid can descend along the spiral protrusion 220 as much as possible, the descending well fluid can basically enter the rotational flow, and the treatment effect of the well fluid is improved.

According to the utility model discloses ground on the other hand, a whirl degritting device for diving oily charge pump is connected with the output shaft of diving oily charge pump, and exposes the structure outside and all adopts fixed connection. The rotational flow sand removing device is connected with the output shaft of the electric submersible pump, which means that the rotational flow sand removing device does not need to be independently installed, extra workload cannot be increased, and the installation efficiency is higher compared with the sand removing device with a complex structure in the prior art; and the exposed structural parts are fixedly connected, which means that no movable part is arranged on the outer side, and the potential safety hazard that parts fall off does not exist.

Preferably, the suction inlet 110 is higher than the drainage outlet 210, the upper end of the spiral protrusion 220 is lower than the suction inlet 110, and the lower end is higher than the drainage outlet 210. First, the suction inlet 110 is higher than the drainage outlet 210, so that the suction of the impurity-containing well fluid and the drainage of the impurity-free well fluid can be ensured without using the high rotation of the spiral rotary protrusion, and the rotation speed of the inner tube 200 can be freely controlled to adapt to different environments (the rotation speed can be controlled according to the sizes of sand grains and other solid particles to improve the impurity collection efficiency as much as possible); secondly, the upper end of the spiral rotating bulge is lower than the suction inlet 110, which means that the rotation speed of the well fluid at the suction inlet 110 is lower than that at the spiral bulge 220, so that on one hand, the efficiency of a cavity between the inner pipe 100 and the outer pipe 100 for sucking the well fluid can be ensured, on the other hand, impurities on the outer side of the outer pipe 100 can be collected in the suction pipe as much as possible, and the purification efficiency of the well fluid collection environment is improved; thirdly, the fact that the lower end of the spiral protrusion 220 is higher than the drainage port 210 means that the rotation speed of the well fluid at the drainage port 210 is lower than that at the spiral protrusion 220, so that on one hand, the efficiency of sucking the well fluid into the middle cavity 230 of the inner tube 200 can be ensured, and on the other hand, after the well fluid without impurities is sucked into the middle cavity 230 of the inner tube 200, the impurities can sink to the tail tube 300 as soon as possible.

In specific implementation, the suction port 110 and the diversion port 210 are both long-strip-shaped and are respectively arranged along the circumferential direction of the outer pipe 100 and the inner pipe 200 at intervals, so that on one hand, the long-strip-shaped liquid inlet ensures the strength of the pipeline, and simultaneously, the length of the liquid inlet is prolonged, the liquid flowing speed can be effectively improved, and further, the extraction efficiency of the purified well liquid is improved; on the other hand, the liquid inlets which are circumferentially arranged at intervals increase the number of the liquid inlets while ensuring the strength of the pipeline, and can also effectively improve the flowing speed of the liquid, thereby improving the exploitation efficiency of the purified well liquid.

According to the utility model discloses on the other hand, the lower extreme of inner tube 200 is the frustum of a cone of the smooth inversion in surface, as shown in fig. 10, because frustum shape structure 240 sets up at the lower extreme of inner tube 200, so it is located the below of water conservancy diversion mouth 210, that is to say, the well liquid here does not need the whirl to carry out solid-liquid separation, makes solid impurity descend more fast under the action of gravity and is favorable to solid impurity's collection more, but if make the inner tube 200 cut here suddenly, will cause the confusion of the well liquid here. Therefore, the device is arranged at the lower end of the inner pipe 200, the surface is smooth and is of an inverted frustum structure, the influence of the rotational flow on the well fluid can be gradually reduced, solid impurities in the well fluid are guided to rapidly descend and deposit to the tail pipe 300, and the disorder of the well fluid caused by the simultaneous action of the rotational flow and the suddenly disappeared rotational flow is avoided.

According to another aspect of the present invention, the outer rim of the outer tube 100 is sleeved with a sealing ring 400, as shown in fig. 4 and 7, the sealing ring 400 is located above the suction inlet 110 and the outer rim of the sealing ring 400 abuts against the inner wall of the oil tube. The sealing ring 400 is arranged to prevent the well fluid containing impurities from flowing upwards to the oil purification area through the gap between the outer pipe 100 and the oil pipe, so as to prevent the finally collected oil from being polluted; the reason why the sealing ring 400 is disposed above the suction port 110 is to ensure that the impurity-containing well fluid can smoothly enter the inner side of the outer tube 100 from the suction port 110.

Further, the outer tube 100 is opened with a plurality of first exhaust holes 120, as shown in fig. 6 and 7, the first exhaust holes 120 are located above the suction port 110 and below the sealing ring 400, and are used for exhausting gas contained in the well fluid. Not only contain the solid impurity who gives first place to with sand in the well fluid that has not been handled, still contain gaseous impurity such as gaseous impurity, gaseous impurity is because the quality is lighter, so it can not upwards promote from guiding opening 210 entering back along with liquid hydrocarbon basically, if leave alone, then gaseous impurity will form between inner tube 200 and outer tube 100 and pile up, form the potential safety hazard, so the utility model discloses a gaseous impurity that sets up in the first exhaust hole 120 of sunction inlet 110 top makes in the well fluid rises and discharges outside outer tube 100 in outer tube 100, prevents to highly hang down to lead to the well fluid to flow out from first exhaust hole 120.

Preferably, the outer tube 100 is provided at an upper end thereof with a first tapered surface 130, as shown in fig. 6, 7 and 8, the first tapered surface 130 is disposed above the sealing ring 400, and is provided with a second vent hole 140, as shown in fig. 6, 7 and 8, the second vent hole 140 is used for discharging gas impurities to an upper annulus. The first venting holes 120 vent a portion of gas impurities to the lower side of the sealing ring 400, which portion of gas will mix into the well fluid outside the outer tube 100 and possibly re-enter the outer tube 100, and if only the first venting holes 120 are used, the gas impurities in the well fluid will increase more and more; under the condition, the utility model discloses second exhaust hole 140 has been set up in the top of sealing washer 400 to the messenger is discharged the upper portion annular space to sealing washer 400 top through the gaseous impurity of second exhaust hole 140, carries out gaseous impurity's reposition of redundant personnel with this, has improved the more and more problem of gaseous impurity in the well fluid, has solved the accumulational potential safety hazard of gaseous impurity. The conical surface is provided to form the second vent hole 140 with a shape with a side bottom and an inner height, so that the discharged gas can fill the whole upper annular space to reserve enough time for further discharging of the gas. In specific implementation, the first tapered surface 130 further extends upward to form a sealing pipe section, the adapter catheter 600 is connected to the upper portion of the inner tube 200, as shown in fig. 9, the sealing pipe section is in transition fit with the inner wall of the adapter catheter 600, and the sealing pipe section is attached to the inner tube 200, so that the connection stability and the rotation synchronism between the adapter catheter 600 and the outer tube 100 are improved.

Further, the cyclone sand removing device for the electric submersible pump further comprises: an airway tube 500, as shown in fig. 8 and 9, the lower end of the airway tube 500 is provided with a second tapered surface 510, as shown in fig. 8 and 9, the second tapered surface 510 is arranged above the first tapered surface 130 and is provided with an inhalation hole 520, as shown in fig. 8 and 9; an air channel 610 is arranged between the airway tube 500 and the adapter catheter 600, as shown in fig. 9, the air suction hole 520 is communicated with the air channel 610. Through setting of air duct 500, second conical surface 510, suction hole 520 and gas flow channel 610, the utility model provides a whirl sand removing device not only can gather the assigned position with the well liquid after the purification through the middle part cavity 230 of inner tube 200, can also discharge the gas of mixing in the well liquid, accomplishes solid-liquid-gas three-phase separation.

The utility model also provides a well fluid processing system, include as above a whirl sand removal device for diving oily charge pump to and the station is handled to the sand, the sand handle the station with the tail pipe is connected for collect the solid impurity that whirl sand removal device discharged to the tail pipe and handle. Because the well fluid treatment system comprises all the technical characteristics of the rotational flow sand removing device for the electric submersible pump, the well fluid treatment system also comprises all the technical effects of the rotational flow sand removing device for the electric submersible pump, and the details are not repeated.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

Claims (10)

1. The utility model provides a whirl sand removal device for latent oily charge pump which characterized in that includes: the outer edge of the inner pipe is provided with a spiral protrusion, the spiral protrusion is used for sucking well fluid into a space between the outer pipe and the inner pipe when the inner pipe rotates, and impurities in the well fluid are kept at the periphery of the well fluid by utilizing the generated centrifugal force; the outer pipe is provided with a suction inlet, the inner pipe is hollow and is provided with a drainage port, the drainage port is used for sucking the well fluid without impurities into the middle cavity, and the well fluid is lifted upwards along the axis of the cavity; the tail pipe is connected with the outer pipe and is positioned below the inner pipe and used for receiving impurities descending under the action of gravity.

2. The cyclone sand removing device for the electrical submersible pump as claimed in claim 1, wherein the suction inlet is higher than the drainage port, the spiral protrusion has an upper end lower than the suction inlet and a lower end higher than the drainage port.

3. The cyclone sand removing device for the electrical submersible pump according to claim 2, wherein the suction inlet and the flow guide port are both configured as long strips and are arranged at intervals along the circumferential direction of the outer tube and the inner tube, respectively.

4. The cyclone desanding device for the electrical submersible pump as claimed in claim 1, wherein a sealing ring is sleeved on the outer edge of the outer pipe, the sealing ring is located above the suction inlet, and the outer edge of the sealing ring abuts against the inner wall of the oil pipe.

5. The cyclone sand removing device for the electrical submersible pump according to claim 4, wherein the outer tube is provided with a plurality of first exhaust holes, and the first exhaust holes are located above the suction inlet and below the sealing ring and used for exhausting gas contained in well fluid.

6. The cyclone sand removing device for an electrical submersible pump according to claim 5 is characterized in that the upper end of the outer tube is provided with a first conical surface which is arranged above the sealing ring and is provided with a second vent hole for discharging gas impurities to the upper annular space.

7. The cyclone sand removing device for the electrical submersible pump according to claim 6, further comprising: the lower end of the air guide pipe is provided with a second conical surface, and the second conical surface is arranged above the first conical surface and is provided with an air suction hole; the upper end of the inner tube is communicated with a switching liquid guide tube, an air flow channel is arranged between the air guide tube and the switching liquid guide tube, and the air suction hole is communicated with the air flow channel.

8. The cyclone sand removing device for the electrical submersible pump according to claim 1, wherein the lower end of the inner tube is in the shape of an inverted frustum with a smooth surface.

9. The rotational flow sand removing device for the electrical submersible pump according to claim 1, wherein the rotational flow sand removing device for the electrical submersible pump is connected with an output shaft of the electrical submersible pump, and exposed structural members are fixedly connected.

10. A well fluid treatment system comprising a cyclone sand removal device for an electric submersible pump according to any one of claims 1 to 9, and a sand treatment station connected to the tail pipe for collecting and treating solid impurities discharged from the cyclone sand removal device to the tail pipe.

Images