CN114635655A - Pollution-free underground electric driving circulating cleaning device and horizontal well shaft cleaning method - Google Patents
Pollution-free underground electric driving circulating cleaning device and horizontal well shaft cleaning method Download PDFInfo
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- CN114635655A CN114635655A CN202210159276.9A CN202210159276A CN114635655A CN 114635655 A CN114635655 A CN 114635655A CN 202210159276 A CN202210159276 A CN 202210159276A CN 114635655 A CN114635655 A CN 114635655A
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- 210000002445 nipple Anatomy 0.000 claims abstract description 17
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- 239000012530 fluid Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 239000004576 sand Substances 0.000 abstract description 2
- 238000009991 scouring Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 33
- 238000010586 diagram Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
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- 238000007789 sealing Methods 0.000 description 5
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- 239000008186 active pharmaceutical agent Substances 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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Abstract
The invention provides a pollution-free underground electric-driving circulation cleaning device and a horizontal well shaft cleaning method, wherein the device comprises an electric-driving short section, a power short section and a cartridge-assembling short section, wherein a motor, a coupling, a speed reducer, an output shaft and a flexible shaft are arranged in the electric-driving short section; the power nipple is provided with a circulation outer cylinder and a pump outer cylinder, the circulation outer cylinder is provided with a circulation hole, and a turbine shaft and a turbine group are arranged in the pump outer cylinder; the assembly short section is provided with a catching basket outer cylinder, an extension outer cylinder and a guide shoe, the sieve tube is hung in the catching basket outer cylinder through a step, and a one-way valve is installed in the guide shoe. The invention utilizes the downhole motor to drive the turbine group to push the downhole liquid to form scouring force in the shaft, so as to scour out settled sand and various tool fragments in the shaft, and capture the solid fragments through the liquid local circulation built in the shaft, thereby realizing the cleaning of the shaft. The invention does not need to pump working fluid into the shaft, does not cause secondary pollution of a producing zone, and is beneficial to oil-gas well development.
Description
Technical Field
The invention relates to the technical field of downhole tools in the petroleum and gas industry, in particular to a pollution-free downhole electric driving circulation cleaning device and a horizontal well shaft cleaning method.
Background
In recent years, domestic unconventional oil and gas resources such as shale gas and the like are explored and developed on a large scale, the number of horizontal wells built in a year is greatly increased, and the problems which are difficult to solve are solved aiming at the fact that the operation technology in a horizontal well shaft is mature day by day. Compared with a vertical well, a large amount of loose falling objects and fragments are retained in a horizontal well shaft, so that the well shaft is easily blocked, a drill is stuck and a pump is held back during operation, a downhole tool is abraded with ground equipment and pipelines, and even the production of an oil-gas well is reduced or stopped. Therefore, the impurities in the shaft must be cleaned up to ensure the normal and safe operation of the subsequent operation. The conventional shaft cleaning operation mainly comprises the steps of fishing metal scraps by a strong magnetic tool and fishing fine scraps by a venturi fishing barrel, and has the problems of incomplete fishing, incomplete fishing objects, low fishing amount and the like, and the effect is very limited; some wells have long production time and low formation pressure, the conventional sand washing or bailing operation is difficult, and a large amount of working fluid leaks into the formation to form secondary pollution. The conventional shaft cleaning method cannot meet the requirement of oil and gas development of a horizontal well, and a method for fundamentally changing shaft cleaning is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems that a pollution-free underground electric driving circulation cleaning device and a horizontal well shaft cleaning method are provided, the horizontal well shaft cleaning work can be completed in one time under the condition of pressure, working fluid does not need to be pumped into a well, and secondary pollution is avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a pollution-free underground electric-driven circulating cleaning device, which comprises an electric-driven short section, a power short section and an assembly short section which are sequentially arranged from top to bottom;
a motor, the coupling, the reducer, an output shaft and a flexible shaft are arranged in the electrically-driven short joint;
the power nipple is provided with a circulation outer cylinder and a pump outer cylinder, the circulation outer cylinder is provided with a circulation hole, a turbine shaft and a turbine group are installed in the pump outer cylinder, and the turbine group is fixedly connected with the turbine shaft;
the assembly short section is provided with a catching basket outer cylinder, an extension outer cylinder and a guide shoe, the sieve tube is hung in the catching basket outer cylinder through a step, and a one-way valve is installed in the guide shoe;
the motor drives the turbine group to rotate through the coupler, the speed reducer, the output shaft, the flexible shaft and the turbine shaft, original liquid or gas in the shaft is stirred, the liquid or the gas flows in from the guide shoe, flows through the through path in the extension outer cylinder through the one-way valve, reaches the inside of the sieve tube, filters falling objects and debris and stays in the sieve tube, pure liquid or pure gas continuously flows into the turbine group, is pushed and accelerated through the turbine group, and the liquid or the gas quickly flows into the circulation outer cylinder and is sprayed to the outside of the pollution-free underground electric driving circulation cleaning device through the circulation hole, and then is bound by the shaft wall of the shaft and returns to the inlet of the guide shoe again.
In the above scheme, still be equipped with control circuit urceolus, motor urceolus, connection nipple joint and bear the nipple joint in the electricity drives the nipple joint, control circuit urceolus upper end is API box thread, install cable contact pin in the control circuit urceolus, cable contact pin installs on the plug pin seat, the plug pin seat pass through straight screw thread with the control circuit urceolus is connected, and control circuit board passes through fastening screw and installs in the control circuit urceolus, control circuit board passes through cable junction with cable contact pin.
In the scheme, a motor and a speed reducer are installed in the motor outer cylinder, the motor is connected with the control circuit board through a cable, the motor is connected with the speed reducer in series through a coupler, an output shaft is connected with the speed reducer in series through a cross rod, the output shaft is installed between the motor outer cylinder and a connecting short section, and a floating piston is installed in the connecting short section.
In the scheme, the two ends of the output shaft are provided with the thrust bearing and the centering bearing.
In the above scheme, a flexible shaft is installed between the bearing short section and the connecting short section, and the flexible shaft is connected with the output shaft in series through the cross rod.
In the scheme, the two ends of the flexible shaft are provided with the thrust bearing group and the centering bearing group.
In the scheme, the included angle between the axis of the circulating hole and the axis of the circulating outer cylinder is 15-60 degrees.
In the scheme, an upper fixing washer, a special turbine righting bearing, a lower fixing washer and a retaining nut are further installed in the pump outer barrel, the turbine group and the turbine shaft are fixedly connected through keys, the special turbine righting bearing is installed at two ends of the turbine group, the special turbine righting bearing and the turbine group are tightly pressed through the upper fixing washer and the lower fixing washer, the turbine shaft is connected with the flexible shaft in series through straight threads, and the retaining nut is installed at the bottom end of the turbine shaft through the straight threads.
In the above scheme, the guide shoe is provided with a slope.
The invention also provides a horizontal well shaft cleaning method using the pollution-free underground electric driving circulation cleaning device, which comprises the following steps:
s1, connecting the pollution-free underground electric driving circulation cleaning device to the tail end of a coiled tubing with a cable, and butting the thread and the cable;
s2, conveying the pollution-free underground electric driving circulation cleaning device to a well section to be cleaned in the horizontal well by using a cable coiled tubing, wherein the original liquid or gas in the shaft is filled in the inner space of the power nipple and the containing nipple;
s3, providing an operation instruction and electric energy to the control circuit board through a ground power supply control cabinet, controlling the motor to operate by the control circuit board, and finally driving the turbine group to rotate by the motor through the coupler, the reducer, the output shaft, the flexible shaft and the turbine shaft; the turbine group rotates rapidly to stir original liquid or gas in a shaft and provide thrust to circulate the liquid or gas inside and outside the pollution-free underground electric driving circulation cleaning device; the circulation direction is that liquid or gas flows in from the guide shoe, flows through the inner drift diameter of the extension outer cylinder through the one-way valve, reaches the sieve tube, filters falling objects and debris and remains in the sieve tube, pure liquid or pure gas continuously flows into the turbine group, is pushed and accelerated by the turbine group, and the liquid or gas quickly flows into the circulation outer cylinder and is sprayed to the outside of the pollution-free underground electric drive circulation cleaning device through the circulation hole, and then is bound by the wall of the shaft cylinder and returns to the inlet of the guide shoe again, so that a circulation is completed;
s4, continuously supplying power to the pollution-free underground electric driving circulation cleaning device by lifting and lowering the coiled tubing back and forth so as to achieve the purpose of cleaning the whole horizontal well shaft; in the cleaning process, the operating power of the pollution-free underground electric driving circulation cleaning device is adjusted by observing the change of the output current;
s5, after cleaning, providing a stop instruction for the control circuit board through a ground power supply control cabinet, and taking the pollution-free underground electric-driven circulation cleaning device out of a shaft by using a cable coiled tubing, wherein the one-way valve can prevent containerized underground falling objects and scraps from falling out of the containerized short section in the taking-out process;
and S6, after the pollution-free underground electric driving circulation cleaning device is lifted to the ground, disassembling the outer cylinder of the catching basket and the extension outer cylinder, and collecting the cleaned underground falling objects and debris.
The pollution-free underground electric driving circulation cleaning device and the horizontal well shaft cleaning method have the following beneficial effects that:
1. the motor drives the turbine group to rotate rapidly, liquid or gas in the underground part is pushed to circulate, falling objects and debris in the circulating coverage space are sucked into the containerized short section, and the purpose of cleaning the whole horizontal well shaft is achieved by lifting and lowering the coiled tubing back and forth.
2. The invention can well salvage small-size falling objects and fragments remained in the shaft, can complete the cleaning work of the shaft of the horizontal well one time under the condition of pressure, and has the advantages of wide salvage object coverage, high salvage quantity and good effect. The pollution-free underground electric driving circulation cleaning device does not need to pump working fluid into the shaft from the ground in the shaft cleaning construction process, directly utilizes underground liquid or gas to form local circulation, does not cause secondary pollution of a production layer, does not generate waste water, saves the environment-friendly treatment cost, is beneficial to smooth production channels of oil and gas wells and promotes the development yield of single wells.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a non-polluting downhole electrically driven circulation cleaning apparatus of the present invention;
FIG. 2 is a schematic structural diagram of an electrically driven nipple in the invention;
FIG. 3 is a schematic structural diagram of the power sub of the present invention;
FIG. 4 is a schematic structural diagram of a cartridge sub of the present invention;
FIG. 5 is a schematic view of the structure of the turbine of the present invention;
FIG. 6 is a schematic view of the construction of the screen of the present invention;
FIG. 7 is a schematic view of the structure of the check valve of the present invention;
FIG. 8 is a schematic fluid flow diagram of a non-polluting downhole electrically-driven circulation cleaning apparatus of the present invention;
in the figure: 1-electric drive short section, 2-power short section, 3-container short section, 101-control circuit outer cylinder, 102-motor outer cylinder, 103-connection short section, 104-bearing short section, 10101-API female buckle thread, 10102-cable pin, 10103-pin base, 10104-control circuit board, 10201-motor, 10202-coupler, 10203-reducer, 10204-output shaft, 10205 thrust bearing, 10206-righting bearing, 10207-upper oil injection hole, 10301-lower oil injection hole, 10302-floating piston, 10401-thrust bearing group, 10402-flexible shaft, 10403-righting bearing group, 201-circulation outer cylinder, 202-pump outer cylinder, 20101-circulation hole, 20201-turbine shaft, 20202-upper fixing washer, 20203-turbine special righting bearing, 10403-motor outer cylinder, 103-connection short section, 104-bearing outer cylinder, 10104-output shaft, 10205-thrust bearing group, 10206-righting bearing group, 10301-circulation hole, 20201-turbine special righting bearing group, 20202-turbine special-motor outer cylinder, and control circuit, 20204-turbine group, 20205-key, 20206-lower fixed washer, 20207-backstop screw cap, 301-catching basket outer cylinder, 302-extension outer cylinder, 303-guide shoe, 30101-sieve tube, 30301-one-way valve and 30303-slope.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in figure 1, the pollution-free underground electric-driving circulating cleaning device comprises an electric-driving short section 1, a power short section 2 and a cartridge short section 3.
The electric drive short section 1 comprises a control circuit outer cylinder 101, a motor outer cylinder 102, a connecting short section 103 and a bearing short section 104. The control circuit outer cylinder 101, the motor outer cylinder 102, the connection short section 103 and the bearing short section 104 are connected through straight threads, and a sealing ring is arranged at the joint to prevent liquid and gas outside the cylinder from entering.
As shown in fig. 2, the upper end of the control circuit outer cylinder 101 is provided with API female thread 10101, which can be connected with other tools such as a cable bridle. A cable pin 10102 is installed in the control circuit outer cylinder 101, and can be connected with an upper cable for transmitting electric energy and electric signals. The cable contact pin 10102 is installed on the plug pin seat 10103, the plug pin seat 10103 is connected with control circuit urceolus 101 through straight thread to at junction installation sealing washer, prevent that a section of thick bamboo is outer liquid, the gas from getting into. The control circuit board 10104 is installed in the control circuit outer cylinder 101 through fastening screws, and is connected with the control circuit board 10104 and the cable contact pin 10102 through cables, and the control circuit board 10104 has ground-underground communication, motor monitoring and motor protection functions.
The motor 10201 and the speed reducer 10203 are fixedly installed in the motor outer cylinder 102 through screws, the motor 10201 and the control circuit board 10104 are connected through cables, the motor 10201 and the speed reducer 10203 are connected in series through a coupler 10202, an output shaft 10204 is connected in series with the speed reducer 10203 through a cross rod, the output shaft 10204 is installed between the motor outer cylinder 102 and a connecting short section 103, and thrust bearings 10205 and a centering bearing 10206 are installed at two ends of the output shaft 10204. The motor 10201 in this embodiment is a dc motor. An upper oil injection hole 10207 is designed on the outer wall of the motor outer cylinder 102, a lower oil injection hole 10301 is designed on the outer wall of the connecting short section 103, and the oil injection hole is sealed by a screwed plug to prevent liquid and gas outside the cylinder from entering. A floating piston 10302 is arranged in the connecting short joint 103. Silicone oil is filled into the motor outer cylinder 102 through the oil filling hole, and the position of the floating piston 10302 can be automatically adjusted according to external pressure, so that the pressure in the motor outer cylinder 102 is the same as the pressure outside the cylinder.
A flexible shaft 10402 is arranged between the bearing short section 104 and the connecting short section 103, the flexible shaft 10402 is connected with an output shaft 10204 in series through a cross rod, and a thrust bearing group 10401 and a centering bearing group 10403 are arranged at two ends of the flexible shaft 10402.
As shown in fig. 3, the power nipple 2 is composed of a circulation outer cylinder 201 and a pump outer cylinder 202 to form a power nipple outer cylinder, the circulation outer cylinder 201 is connected with the pump outer cylinder 202 through straight threads, and a sealing ring is arranged at the joint to prevent liquid and gas outside the cylinders from entering.
The circulating outer cylinder 201 is provided with circulating holes 20101, generally 4-8 circulating holes are arranged along the circumference, and the included angle between the axis of the circulating hole 20101 and the axis of the circulating outer cylinder 201 is 15-60 degrees, so that energy loss is reduced in the process that liquid or gas returns to the flow inlet of the guide shoe 303 after being sprayed to the outside of the device. The circulation hole 20101 can be internally provided with a nozzle with a smaller aperture, which is beneficial to forming liquid or gas flow with stronger impact force to achieve the purpose of cleaning the wall of the shaft.
The pump outer cylinder 202 is internally provided with a turbine shaft 20201, an upper fixing washer 20202, a special turbine centralizing bearing 20203, a turbine group 20204, a lower fixing washer 20206 and a retaining nut 20207. The turbine group 20204 and the turbine shaft 20201 are fixedly connected through a key 20205, the special turbine centralizing bearing 20203 is installed at two ends of the turbine group 20204, and the special turbine centralizing bearing 20203 and the turbine group 20204 are tightly pressed through an upper fixing gasket 20202 and a lower fixing gasket 20206. 2-5 sets of turbine groups are installed as required. The turbine shaft 20201 is connected with the flexible shaft 10402 in series through straight threads, and the retaining nut 20207 is installed at the bottom end of the turbine shaft 20201 through the straight threads.
As shown in fig. 3, the assembly nipple 3 is a power assembly nipple outer cylinder composed of a catching basket outer cylinder 301, an extension outer cylinder 302 and a guide shoe 303, the catching basket outer cylinder 301, the extension outer cylinder 302 and the guide shoe 303 are connected through straight threads, and a sealing ring is installed at the joint to prevent the outer cylinder from being communicated with liquid and gas.
The outer cylinder 301 of the fishing basket is connected with the outer cylinder 202 of the pump through straight threads, and a sealing ring is arranged at the joint to prevent the outer cylinder from communicating with liquid and gas outside the cylinder. The screen 30101 is hung in the outer cylinder 301 of the fishing basket through steps. The screen pipe 30101 is perforated with fine holes on its surface to filter the debris.
The extension outer cylinder 302 is provided with 1-3 sections according to the requirement, and the length of 1 section is 1-1.5 m.
The guide shoe 303 is internally provided with 2 groups of one-way valves 30301, has the functions of allowing inflow and preventing outflow, and is provided with a slope 30302 which has the function of facilitating well entry.
The invention also provides a horizontal well shaft cleaning method using the pollution-free underground electric driving circulation cleaning device, which comprises the following specific steps:
s1, connecting the pollution-free underground electric driving circulating cleaning device to the tail end of the coiled tubing with the cable, and butting the thread and the cable;
s2, conveying the pollution-free underground electric driving circulation cleaning device to a well section to be cleaned in the horizontal well by using a cable coiled tubing, wherein the original liquid or gas in the shaft is filled in the inner space of the power nipple 2 and the cartridge nipple 3.
S3, providing operation instructions and electric energy to the control circuit board 10104 through the ground power supply control cabinet, the control circuit board 10104 controlling the motor 10201 to operate, the motor 10201 finally driving the turbine set 20204 to rotate through the shaft coupling 10202, the speed reducer 10203, the output shaft 10204, the flexible shaft 10402 and the turbine shaft 20201. The turbine 20204 spins rapidly, churns the fluids or gases that are present in the wellbore, and provides sufficient thrust to circulate the fluids or gases inside and outside the clean-up apparatus. The circulation direction is that liquid or gas flows in from the guide shoe 303, passes through the one-way valve 30302, flows through the drift diameter in the extension outer cylinder 302, reaches the sieve pipe 30101, filters falling objects and debris and remains in the sieve pipe 30101, pure liquid or pure gas continuously flows into the turbine group 20204, is pushed and accelerated by the turbine group 20204, and the liquid or gas quickly flows into the circulation outer cylinder 201 and is sprayed to the outside of the pollution-free downhole electric driving circulation cleaning device through the circulation hole 20101, and then is bound by the wall of the shaft and returns to the inflow port of the guide shoe 303 again, so that a circulation is completed, as shown in fig. 8. Through the circulation, falling objects and debris in the circular covering space can be continuously sucked into the cartridge pup joint 3 along with liquid or gas.
And S4, continuously supplying power to the pollution-free underground electric driving circulation cleaning device by lifting and lowering the coiled tubing back and forth so as to achieve the purpose of cleaning the whole horizontal well shaft. And in the cleaning process, the operating power of the pollution-free underground electric driving circulation cleaning device is adjusted by observing the change of the output current.
S5, after the clearance is completed, through ground power supply control cabinet, provide stop instruction to control circuit board 10104, use cable coiled tubing to drive circulation cleaning device in the pit with pollution-free and drive the pit shaft, one way check valve 30302 can prevent to play the in-process collection dress from the underground falling object and piece drop out collection dress nipple joint 3.
S6, after the pollution-free underground electric driving circulation cleaning device is lifted to the ground, the outer cylinder 301 of the catching basket and the extension outer cylinder 302 are disassembled, and then the cleaned underground falling objects and debris can be collected.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A pollution-free underground electric-driving circulating cleaning device is characterized by comprising an electric-driving short section (1), a power short section (2) and a collecting short section (3) which are sequentially arranged from top to bottom;
a motor (10201), the coupling (10202), a speed reducer (10203), an output shaft (10204) and a flexible shaft (10402) are arranged in the electric drive short section (1);
a circulating outer cylinder (201) and a pump outer cylinder (202) are arranged on the power short section (2), a circulating hole (20101) is formed in the circulating outer cylinder (201), a turbine shaft (20201) and a turbine group (20204) are installed in the pump outer cylinder (202), and the turbine group (20204) is fixedly connected with the turbine shaft (20201);
the assembly short section (3) is provided with a catching basket outer cylinder (301), an extension outer cylinder (302) and a guide shoe (303), the sieve tube (30101) is hung in the catching basket outer cylinder (301) through a step, and a one-way valve (30301) is installed in the guide shoe (303);
the motor (10201) drives the turbine group (20204) to rotate through the coupler (10202), the reducer (10203), the output shaft (10204), the flexible shaft (10402) and the turbine shaft (20201), so that original liquid or gas in the well bore is stirred, the liquid or gas flows in from the guide shoe (303), flows through the inner through path of the extension outer cylinder (302) through the one-way valve (30302), reaches the screen pipe (30101), drops and debris are filtered and left in the screen pipe (30101), pure liquid or pure gas continuously flows in the turbine group (20204), is pushed and accelerated by the turbine group (20204), and the liquid or gas quickly flows in the circulation outer cylinder (201) and is sprayed outside the pollution-free downhole electric driving circulation cleaning device through the circulation hole (20101), and then is bound by the well bore to return to the flow inlet of the guide shoe (303).
2. The pollution-free underground electric-driving circulation cleaning device as claimed in claim 1, wherein a control circuit outer cylinder (101), a motor outer cylinder (102), a connection short section (103) and a bearing short section (104) are further arranged in the electric-driving short section (1), API female-thread threads (10101) are arranged at the upper end of the control circuit outer cylinder (101), cable contact pins (10102) are installed in the control circuit outer cylinder (101), the cable contact pins (10102) are installed on a pin inserting seat (10103), the pin inserting seat (10103) is connected with the control circuit outer cylinder (101) through straight threads, the control circuit board (10104) is installed in the control circuit outer cylinder (101) through fastening screws, and the control circuit board (10104) is connected with the cable contact pins (10102) through cables.
3. A pollution-free downhole electric-driven circulation cleaning device according to claim 2, wherein a motor (10201) and a speed reducer (10203) are installed in the motor outer cylinder (102), the motor (10201) is connected with a control circuit board (10104) through a cable, the motor (10201) and the speed reducer (10203) are connected in series through a coupling (10202), an output shaft (10204) is connected in series with the speed reducer (10203) through a cross rod, the output shaft (10204) is installed between the motor outer cylinder (102) and a connection short section (103), and a floating piston (10302) is installed in the connection short section (103103).
4. A non-polluting downhole electric drive circulation cleaning apparatus according to claim 3, wherein both ends of the output shaft (10204) are mounted with a thrust bearing (10205) and a centralizing bearing (10206).
5. A non-polluting downhole electric drive circulation cleaning device according to claim 3, wherein a flexible shaft (10402) is mounted between the carrier sub (104) and the connection sub (103), the flexible shaft (10402) being connected in series with the output shaft (10204) through a cross bar.
6. A non-polluting downhole electric driving circulation cleaning device according to claim 5, wherein a thrust bearing set (10401) and a centering bearing set (10403) are mounted at both ends of the flexible shaft (10402).
7. A non-polluting downhole electric driving circulation cleaning device according to claim 1, wherein the angle between the axis of the circulation hole (20101) and the axis of the circulation outer cylinder (201) is 15-60 °.
8. The clean-up device of the pollution-free downhole electric-driven circulation cleaning device as claimed in claim 1, wherein an upper fixing washer (20202), a turbine-dedicated centralizing bearing (20203), a lower fixing washer (20206) and a retaining nut (20207) are further installed in the pump outer cylinder (202), the turbine set (20204) is fixedly connected with the turbine shaft (20201) through a key (20205), the turbine-dedicated centralizing bearing (20203) is installed at two ends of the turbine set (20204), the turbine-dedicated centralizing bearing (20203) and the turbine set (20204) are tightly pressed through the upper fixing washer (20202) and the lower fixing washer (20206), the turbine shaft (20201) is connected with the flexible shaft (10402) in series through straight threads, and the retaining nut (20207) is installed at the bottom end of the turbine shaft (20201) through straight threads.
9. A non-polluting downhole electric drive circulation cleaning device according to claim 1, wherein the guide shoe (303) is provided with a ramp (30302).
10. A method of horizontal wellbore cleanup using the non-polluting downhole electric drive cycle cleanup device of claim 1, comprising the steps of:
s1, connecting the pollution-free underground electric driving circulating cleaning device to the tail end of a cable-passing coiled tubing, and butting the screw thread and the cable;
s2, conveying the pollution-free underground electric driving circulation cleaning device to a well section to be cleaned in a horizontal well by using a cable coiled tubing, wherein original liquid or gas in a shaft is filled in the inner space of the power nipple (2) and the assembly nipple (3);
s3, providing operation instructions and electric energy to the control circuit board (10104) through a ground power supply control cabinet, wherein the control circuit board (10104) controls the motor (10201) to operate, and the motor (10201) finally drives the turbine set (20204) to rotate through the coupling (10202), the speed reducer (10203), the output shaft (10204), the flexible shaft (10402) and the turbine shaft (20201); the turbine group (20204) rotates rapidly to stir original liquid or gas in a shaft and provide thrust to circulate the liquid or gas in and out of the pollution-free underground electric driving circulation cleaning device; the circulation direction is that liquid or gas flows in from the guide shoe (303), passes through the one-way valve (30302), flows through the inner diameter of the extension outer cylinder (302), reaches the sieve tube (30101), filters falling objects and debris and remains in the sieve tube (30101), pure liquid or pure gas continuously flows into the turbine group (20204), is pushed and accelerated by the turbine group (20204), and the liquid or gas quickly flows into the circulation outer cylinder (201) and is sprayed to the outside of the pollution-free downhole electric-driven circulation cleaning device through the circulation hole (20101), then is bound by a shaft and returns to the flow inlet of the guide shoe cylinder wall (303), so that a circulation is completed;
s4, continuously supplying power to the pollution-free underground electric driving circulation cleaning device by lifting and lowering the coiled tubing back and forth so as to achieve the purpose of cleaning the whole horizontal well shaft; in the cleaning process, the operating power of the pollution-free underground electric driving circulation cleaning device is adjusted by observing the change of the output current;
s5, after cleaning, providing a stop instruction for the control circuit board (10104) through a ground power supply control cabinet, using a cable coiled tubing to lift the pollution-free underground electric driving circulation cleaning device out of a shaft, wherein the one-way valve (30302) can prevent containerized underground falling objects and debris from falling out of the containerized short joint (3) in the lifting process;
s6, after the pollution-free underground electric driving circulation cleaning device is lifted to the ground, the catching basket outer cylinder (301) and the extension outer cylinder (302) are disassembled, and underground falling objects and fragments which are cleaned are collected.
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