CN108625804B - Rotational flow flushing tool with controllable rotational speed - Google Patents
Rotational flow flushing tool with controllable rotational speed Download PDFInfo
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- CN108625804B CN108625804B CN201810594078.9A CN201810594078A CN108625804B CN 108625804 B CN108625804 B CN 108625804B CN 201810594078 A CN201810594078 A CN 201810594078A CN 108625804 B CN108625804 B CN 108625804B
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- inner sleeve
- nozzle
- cable receiver
- flushing
- sleeve
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 79
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 9
- 239000003129 oil well Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Nozzles (AREA)
Abstract
The invention relates to a rotational flow flushing tool with a controllable rotational speed, and belongs to the technical field of downhole flushing tools. The rotational flow flushing tool with controllable rotational speed consists of a shell, an upper connector, a lower connector, a rotary mandrel, an assembly inner sleeve, a centralizing bearing, a turbine and a flushing nozzle; one end of the shell is connected with an upper joint through threads, and the other end of the shell is movably provided with a lower joint through a rubber sealing ring and an end cover; one end of the lower joint is connected with a flushing nozzle in a threaded manner; an assembling inner sleeve is arranged in the outer shell; a rotary mandrel is arranged in the assembly inner sleeve through a centralizing bearing and a turbine; one end of the rotary mandrel is fixedly connected with the flushing nozzle and the lower joint; the rotational flow flushing tool with the controllable rotational speed is simple in structure and ingenious in design, solves the problems that the existing flushing tool is small in speed control range and needs to be frequently modified to enable the controllable speed range to be matched with the requirements of various oil-gas wells, and is complex in working procedure and high in labor intensity, and the production and use requirements of enterprises are met.
Description
Technical Field
The invention relates to a rotational flow flushing tool with a controllable rotational speed, and belongs to the technical field of downhole flushing tools.
Background
With the deep development of petroleum and natural gas, part of oil wells are increasingly severely sand-producing, and if the oil wells are not treated in time, the phenomena of sand blockage, oil layer sand burying, oil pipe scaling, oil pump sand clamping and the like are easy to occur. Therefore, the flushing tool must be used for well flushing and sand removing operation at proper time so as to reduce the flow resistance of oil gas and improve the exploitation efficiency. The traditional flushing tool has the problems that the rotating speed of a spray head cannot be controlled, and when the spray head rotates too fast, the fluid of flushing liquid is atomized, so that the cleaning effect is poor; in order to solve the problem, a speed-controllable flushing tool is currently available on the market, and the problems existing in the conventional flushing tool can be well solved. However, the flushing tool has the problem of small speed control range, and in order to achieve good cleaning effect and energy-saving effect, the optimal rotating speeds of the flushing tool when flushing oil wells with different types and different well conditions are different; therefore, the flushing tool is often required to be modified to enable the controllable speed range of the flushing tool to be matched with the requirements of various oil and gas wells, so that the requirements of enterprises on production and use can be met, and the problems of complex working procedures and high labor intensity exist; it is therefore necessary to develop a controllable rotational speed rinsing tool to solve the above problems of the existing rinsing tools.
Disclosure of Invention
The invention aims at: the rotational flow flushing tool is simple in structure and stable in performance, and solves the problems of complex working procedures and high labor intensity caused by frequent transformation due to the fact that the existing flushing tool is small in speed control range.
The technical scheme of the invention is as follows:
the rotational flow flushing tool with controllable rotational speed consists of a shell, an upper joint, a lower joint, a rotary mandrel, an assembling inner sleeve, a centralizing bearing, a turbine and a flushing nozzle; the method is characterized in that: one end of the shell is connected with an upper joint through threads, and the other end of the shell is movably provided with a lower joint through a rubber sealing ring and an end cover; one end of the lower joint is connected with a flushing nozzle in a threaded manner; an assembling inner sleeve is arranged in the outer shell; a rotary mandrel is arranged in the assembly inner sleeve through a centralizing bearing and a turbine; one end of the rotary mandrel is fixedly connected with the flushing nozzle and the lower joint; one end of the assembling inner sleeve is symmetrically provided with a cable receiver A and a cable receiver B; an iron core is arranged in an annulus between the other end of the assembly inner sleeve and the outer shell; the conductive coil is radially wound on the circumferential surface of the iron core; one end of the conductive coil passes through the assembly inner sleeve and enters the interior of the cable receiver A; the other end of the conductive coil passes through the assembly inner sleeve and enters the interior of the cable receiver B; the conductive coil in the cable receiver B passes through the inner sleeve and then enters the cable receiver A, and the ends of the conductive coil entering the cable receiver A extend to the outer end through the coil inlet and outlet arranged on the shell.
The circumference of the inner sleeve of the assembly is stepped; one end of the assembly inner sleeve is fixedly connected with the shell through a fastening pin; the circumference surface of the assembling inner sleeve is provided with a separation flange; an iron core is arranged in an annular space between the assembling inner sleeve at one side of the separation flange and the outer shell; coil guide grooves are symmetrically arranged on the circumferential surface of the inner assembly sleeve at the other side of the separation flange; two ends of a conductive coil wound on the iron core enter the inside of the cable receiver A and the inside of the cable receiver B through coil guide grooves respectively; the circumference of the inner assembly sleeve between the cable receiver A and the cable receiver B is provided with a radial annular hole, and the conductive coil in the cable receiver B enters the cable receiver A through the radial annular hole.
The cable receiver A and the cable receiver B are composed of a lead sleeve, a sealing outer sleeve and a sealing inner sleeve; one end of the sealing jacket is fixedly provided with a lead sleeve; the other end of the sealing outer sleeve is fixedly sleeved with a sealing inner sleeve; radial connecting holes are correspondingly formed in the circumferential surfaces of the sealing inner sleeve and the sealing outer sleeve; each radial connecting hole is communicated with a radial annular hole of the assembling inner sleeve.
The rotary mandrel consists of a shunt head, a mandrel body, a cutting coil and a metal guide rod, wherein the mandrel body is a stepped shaft, and one end of the mandrel body is provided with the shunt head through a connector body; a metal guide rod is fixedly arranged in the connector body at one side of the shunt head; the other end of the mandrel body is fixedly connected with the lower joint and the flushing nozzle; a plurality of flow holes are uniformly formed in the circumference of the other end of the mandrel body; each flow hole is communicated with the flushing nozzle; the thick end part of the mandrel body is uniformly provided with a plurality of T-shaped winding grooves; the cutting coil is transversely wound on the mandrel body through each T-shaped winding groove; the two ends of the cutting coil are respectively connected with the two ends of the metal guide rod through the communicating holes arranged on the mandrel body.
The T-shaped winding groove corresponds to the iron core.
The split flow head is a cone.
The flushing spray head consists of a spray head body, a cyclone nozzle, a forward nozzle and a guide pipe; one end of the lower joint is connected with a spray head body in a threaded manner; the tail end of the spray head body is in a conical structure; a plurality of swirl nozzles are uniformly distributed on the circumferential surface of the nozzle body; one end of the nozzle body is fixedly provided with a forward nozzle; a flow guide pipe is arranged in the spray head body; one end of the honeycomb duct is fixedly connected with the mandrel body; the other end of the flow guiding pipe is connected with the forward nozzle in a clamping way and is in a communicating state.
The honeycomb duct is of an integrated structure; a plurality of cyclone branch pipes are uniformly distributed on the circumferential surface of the flow guide pipe; the cyclone branch pipes are arranged in an arc shape, and the arc angles and the arc directions of the cyclone branch pipes are the same.
The swirl nozzle consists of a nozzle body, a baffle ring and a swirl impeller; the circumference of the nozzle body is fixedly provided with a nozzle body; the inside of the nozzle body is fixedly provided with a rotational flow impeller through a baffle ring; one end of the rotational flow impeller is arc-shaped; the circumference of the rotational flow impeller is spirally and uniformly provided with a plurality of rotational flow blades.
The invention has the advantages that:
the rotational flow flushing tool with the controllable rotational speed is simple in structure and ingenious in design, achieves the purpose of controlling the rotational speed of the flushing nozzle by changing the current of the conductive coil and the turbine displacement, solves the problems of small speed control range, complex working procedures and high labor intensity caused by frequent transformation existing in the existing flushing tool, and meets the production and use requirements of enterprises.
Drawings
FIG. 1 is a schematic diagram of a front view of the present invention;
FIG. 2 is a schematic view of the construction of the fitting sleeve of the present invention;
FIG. 3 is a schematic view of the structure in the direction A-A in FIG. 1;
FIG. 4 is a schematic view of the structure in the direction B-B in FIG. 1;
FIG. 5 is a schematic view of the structure in the direction C-C in FIG. 1;
FIG. 6 is a schematic view of the structure in the direction D-D in FIG. 1;
FIG. 7 is a schematic view of the structure in the E-E direction in FIG. 1;
FIG. 8 is a schematic view of the structure in the F-F direction of FIG. 1;
FIG. 9 is a schematic diagram of the structure in the G-G direction of FIG. 2;
FIG. 10 is a schematic view of the cable receiver of the present invention;
FIG. 11 is a schematic structural view of the seal inner sleeve of the present invention;
FIG. 12 is a schematic view of a shunt head according to the present invention;
FIG. 13 is a schematic view of a shower head according to the present invention;
fig. 14 is an enlarged schematic view of the structure at H in fig. 13;
fig. 15 is a schematic structural view of the swirl vane of the present invention.
In the figure: 1. the device comprises a shell, 2, an upper joint, 3, a lower joint, 4, an assembly inner sleeve, 5, a centralizing bearing, 6, a turbine, 7, a shunt head, 8, a flushing nozzle, 9, a cable receiver A,10, a cable receiver B,11, an iron core, 12, a conductive coil, 13, a separation flange, 14, a coil inlet and outlet, 15, a coil guide groove, 16, a radial annular hole, 17, a fastening pin, 18, a lead sleeve, 19, a sealing outer sleeve, 20, a sealing inner sleeve, 21, a radial connecting hole, 22, a mandrel body, 23, a cutting coil, 24, a metal guide rod, 25, a joint body, 26, a flow hole, 27, a T-shaped winding groove, 28, a nozzle body, 29, a swirl nozzle, 30, a forward nozzle, 31, a honeycomb duct, 32, a swirl branch pipe, 33, a nozzle body, 34, a baffle ring, 35, a swirl impeller, 36 and a swirl vane.
Detailed Description
The rotational flow flushing tool with controllable rotational speed consists of a shell 1, an upper joint 2, a lower joint 3, a rotary mandrel, an assembly inner sleeve 4, a centralizing bearing 5, a turbine 6 and a flushing nozzle 8; one end of the shell 1 is connected with an upper joint 2 through threads, and the other end of the shell 1 is movably provided with a lower joint 3 through a rubber sealing ring 9 and an end cover 10; the lower joint 3 is free to rotate within the end cap 10 when subjected to a force.
The purpose of setting the rubber sealing ring 9 is that: so as to seal between the lower joint 3 and the end cover 10 through the rubber sealing ring 9; further, the problem of leakage of the rinse liquid from between the lower joint 3 and the cap 10 is prevented.
One end of the lower joint 3 is connected with a flushing nozzle 8 in a threaded manner; the shower head 8 is composed of a head body 28, a swirl nozzle 29, a forward nozzle 30, and a draft tube 31 (see fig. 13 of the specification).
One end of the lower joint 3 is connected with a spray head body 28 in a threaded manner; the lower joint 3 can drive the shower nozzle body 28 to rotate together when rotating, and in operation, as the rotation direction of the shower nozzle body 28 driven by the lower joint 3 is constant, the screwing direction of the shower nozzle body 28 and the lower joint 3 is consistent with the rotation stress direction of the shower nozzle body 28 driven by the lower joint 3, so that the problem of loosening in the process of driving the shower nozzle body 28 to rotate by the lower joint 3 can be avoided.
The end of the nozzle body 28 is in a conical structure; when so arranged, the resistance to the forward movement of the spray head body 28 can be reduced, thereby further reducing the energy consumption.
A plurality of swirl nozzles 29 are uniformly distributed on the circumferential surface of the nozzle body 28; the swirl nozzle 29 is composed of a nozzle body 33, a baffle 34 and a swirl impeller 35 (see fig. 14 of the specification); the nozzle body 33 is fixedly arranged on the circumferential surface of the nozzle body 28; the inside of the nozzle body 33 is fixedly provided with a rotational flow impeller 35 through a baffle ring 34; one end of the swirl impeller 35 is arc-shaped; a plurality of swirl blades 36 are spirally distributed on the circumference of the swirl impeller 35 (see fig. 15 of the specification). The purpose of the swirl nozzle 29 is to: so that the rinsing liquid entering the cyclone nozzle 29 is sprayed out under the guidance of the cyclone impeller 35, the spiral cyclone blades 36 can promote the rinsing liquid to form a cyclone, thus further enhancing the cyclone force of the rinsing liquid and further achieving the purpose of enhancing the cleaning effect of the rinsing tool.
One end of the nozzle body 28 is fixedly provided with a forward nozzle 30; the inner bore of the forward nozzle 30 is tapered, and the forward nozzle 30 is arranged so that: the flushing liquid entering the forward nozzle 30 is further pressurized through the tapered hole of the inner hole of the forward nozzle 30, so that the flushing tool achieves better flushing effect.
A plurality of swirl ribs (not shown in the drawings of the specification) are spirally disposed in the inner bore of the forward nozzle 30. The forward nozzle 30 is so arranged for the purpose of: so that the rotating forward nozzle 30 can generate a swirling flow by driving the flow of the flushing liquid by the swirling flow edge when the flushing liquid is ejected from the forward nozzle 30 with a certain pressure.
A flow guide pipe 31 is arranged in the nozzle body 28; the flow guide pipe 31 is of an integral structure; a plurality of cyclone branch pipes 32 are uniformly distributed on the circumferential surface of the flow guide pipe 31; the cyclone branch pipes 32 are arranged in an arc shape, and the arc angles and the arc directions of the cyclone branch pipes 32 are the same. The purpose of the draft tube 31 is to: so that when the flushing liquid entering the flow guide pipe 31 is sprayed out through the cyclone branch pipe 32 and enters the spray head body 28, the flushing liquid is sprayed out along the curvature of the cyclone branch pipe 32, and the flushing liquid is sprayed out with a certain centrifugal force under the rotation action of the flow guide pipe 31; thus, the flushing liquid entering the nozzle body 28 is in a swirling state.
One end of the flow guide pipe 31 is fixedly connected with the mandrel body 22 (the threaded connection and the welding connection are all possible); the other end of the flow guiding pipe 31 is connected with the forward nozzle 30 in a clamping way and is in a communicating state.
The shell 1 is internally provided with an assembling inner sleeve 4 (see figure 2 of the specification), and the circumference of the assembling inner sleeve 4 is in a ladder shape; one end of the fitting inner sleeve 4 is fixedly connected with the outer shell 1 by a fastening pin 17 (see fig. 4 of the specification).
The circumference surface of the assembling inner sleeve 4 is provided with a separation flange 13; an iron core 11 is arranged in the annular space between the assembling inner sleeve 4 at one side of the separation flange 13 and the outer shell 1; a conductive coil 12 is radially wound around the circumferential surface of the core 11; when the conductive coil 12 is electrified, a magnetic field is formed in the inner assembly sleeve 4 under the cooperation of the iron core 11, and when the current flowing through the conductive coil 12 is stronger, the magnetic field in the inner assembly sleeve 4 is stronger, and conversely, the weaker.
The cable receiver A9 and the cable receiver B10 are symmetrically clamped in the inner assembly sleeve 4 at the other side of the separation flange 13.
The cable receiver A9 and the cable receiver B10 are each composed of a lead sleeve 18, a seal outer sleeve 19, and a seal inner sleeve 20 (see fig. 10 of the specification).
One end of the sealing jacket 19 is fixedly provided with a lead sleeve 18; the other end of the sealing outer sleeve 19 is fixedly sleeved with a sealing inner sleeve 20; radial connecting holes 21 are correspondingly formed in the circumferential surfaces of the sealing inner sleeve 20 and the sealing outer sleeve 19; each radial connecting hole 21 communicates with the radial annular hole 16 of the fitting inner sleeve 4. The sealing outer sleeve 19 is in a bonding and sealing connection with the assembly inner sleeve 4 and the outer shell 1, so that impurities are prevented from entering the interior of the flushing tool through gaps between the sealing outer sleeve 19 and the assembly inner sleeve 4 and the outer shell 1. The aperture of the lead sleeve 18 corresponds to the outer diameter of the conductive coil 12; thus, the problem of impurity entering when the intervals between the conductive coil 12 and the inner hole of the lead sleeve 18 are too large can be avoided.
Coil guide grooves 15 are symmetrically provided on the circumferential surface of the fitting inner sleeve 4 between the cable receiver A9 and the cable receiver B10 and the partition flange 13 (see fig. 8 and 9 of the specification). A radial annular ring 16 (see fig. 3 of the specification) is provided on the circumferential surface of the fitting inner sleeve 4 between the cable receiver A9 and the cable receiver B10.
One end of the conductive coil 12 wound on the iron core 11 passes through the assembly inner sleeve 4 through the coil guide groove 15, then enters the inside of the sealing inner sleeve 20 through the lead sleeve 18 of the cable receiver A9 (see fig. 2 of the specification); the other end of the conductive coil 12 passes through the fitting inner sleeve 4 through the coil guide groove 15, passes through the lead sleeve 18 of the cable receiver B10, and then enters the inside of the sealing inner sleeve 20.
The conductive coil 12 entering the sealing inner sleeve 20 of the cable receiver B10 enters the sealing inner sleeve 20 of the cable receiver A9 after passing through the radial annular hole 16 and the radial connecting hole 21; the ends of the conductive coil 12 entering the cable receiver A9 extend to the outer ends through coil inlets and outlets 14 provided on the housing 1. The ends of the conductive coil 12 extending to the outer end are connected to an external cable.
A rotary mandrel is arranged in the assembly inner sleeve 4 through a centralizing bearing 5 and a turbine 6 (see figure 1 of the specification); the rotary mandrel consists of a shunt head 7, a mandrel body 22, a cutting coil 23 and a metal guide rod 24, wherein the mandrel body 22 is a stepped shaft, and one end of the mandrel body 22 is provided with the shunt head 7 through a joint body 25; the diverter head 7 is in the form of a cone (see fig. 12 of the description), and the diverter head 7 is arranged so that: so that the flushing liquid can be uniformly dispersed along the conical surface of the flow dividing head 7 and uniformly flow through the turbine 6 after entering the upper joint 2; and further, the problem of uneven dispersion when the end face of the shunt head 7 takes other shapes is avoided.
A metal guide rod 24 is fixedly arranged in a joint body 25 at one side of the shunt head 7 (see figure 12 of the specification); the other end of the mandrel body 22 is fixedly connected with the lower joint 3 and the flushing nozzle 8; the other end circumference of the mandrel body 22 is uniformly provided with a plurality of flow holes 26; each of the flow holes 26 communicates with the flow guide 31 of the shower head 8.
The thick end part of the mandrel body 22 is uniformly provided with a plurality of T-shaped wire winding grooves 27 (see fig. 5 of the specification); the T-shaped winding slot 27 corresponds to the core 11. Thus, the cutting coil 23 wound inside the T-shaped winding groove 27 is positioned inside the iron core 11, and the rotating cutting coil 23 can cut the magnetic force lines of the magnetic field inside the iron core 11 when in operation.
The cutting coil 23 is transversely wound on the mandrel body 22 through each T-shaped winding groove 27; the two ends of the cutting coil 23 are respectively connected with two ends of the metal guide rod 24 through communication holes arranged on the mandrel body 22. Thus, under the action of the metal guide rod 24, the cutting coil 23 forms a closed loop, and when the cutting coil 23 rotates along with the mandrel body 22, the cutting coil 23 cuts magnetic force lines in the assembling inner sleeve 4, so that torque for preventing the mandrel body 22 from rotating can be generated. When the magnetic field in the inner sleeve 4 is stronger, the blocking torque generated by the cutting coil 23 cutting magnetic lines is larger, and the rotating speed of the mandrel body 22 is reduced; whereas the rotational speed of the spindle body 22 will increase. The magnetic field in the assembling inner sleeve 4 can be controlled by adjusting the current of the conductive coil 12, so that the purpose of controlling the rotating speed of the mandrel body 22 by adjusting the current of the conductive coil 12 can be achieved.
When the rotational speed-controllable rotational flow flushing tool works, the flushing tool is firstly connected to the continuous oil pipe string through the upper joint 2, and then the flushing tool is lowered to the bottom of the well through the continuous oil pipe string.
Pumping high-pressure flushing fluid into the flushing tool through the coiled tubing string; after entering the upper joint 2, the flushing fluid is uniformly dispersed into the annulus between the mandrel body 22 and the assembling inner sleeve 4 along the conical surface of the split head 7, and impacts the turbine 6 to drive the mandrel body 22 to rotate, and the mandrel body 22 drives the flow guide pipe 31, the lower joint 3 and the nozzle body 28 to synchronously rotate in the rotating process.
In this process, after the flushing liquid passes through the turbine 6, the flushing liquid enters the interior of the draft tube 31 through the flow hole 26; part of the flushing liquid entering the guide pipe 31 is sprayed out in a swirl manner through the forward nozzle 30 to clean a pipe well; while another portion of the rinse liquid is sprayed into the interior of the spray head body 28 through the swirl branch pipe 32; the flushing liquid entering the nozzle body 28 is sprayed out in a swirling flow manner through the swirling flow nozzle 29 to clean the pipe wall of the pipe well.
In the working process of the flushing tool, the rotational flow effect is higher in the rotational speed requirement, so that the rotational flow flushing effect is better only in a certain rotational speed range, and the rotational speed requirements of different types of oil wells on the flushing tool are different. In order to achieve the best cleaning effect and energy-saving effect, the best rotating speed of the flushing tool in different types of oil wells is different.
When the rotating speed of the mandrel body 22 is required to be reduced by the flushing tool, the intensity of current flowing through the conductive coil 12 is increased, so that the intensity of a magnetic field formed in the assembling inner sleeve 4 is enhanced; the larger the blocking torque generated by the cutting coil 23 cutting the magnetic force lines, the lower the rotation speed of the mandrel body 22; at the same time, the rotation speed of the mandrel body 22 can be reduced by reducing the flow rate of the flushing liquid, and the method for reducing the flow rate of the flushing liquid has the problem of inaccurate control, so that the method can only be used as an auxiliary means. When the flushing tool is required to raise the rotation speed of the mandrel body 22, the current intensity flowing through the conductive coil 12 is reduced or the flushing fluid flow rate is raised to increase the turbine displacement.
The rotational flow flushing tool with the controllable rotational speed is simple in structure and ingenious in design, solves the problems of small speed control range, complex working procedure and high labor intensity caused by frequent transformation in the existing flushing tool, and meets the production and use requirements of enterprises.
Claims (2)
1. The rotational flow flushing tool with the controllable rotational speed comprises a shell (1), an upper joint (2), a lower joint (3), a rotary mandrel, an assembly inner sleeve (4), a centralizing bearing (5), a turbine (6) and a flushing nozzle (8); the method is characterized in that: one end of the shell (1) is connected with an upper joint (2) through threads, and the other end of the shell (1) is movably provided with a lower joint (3) through a rubber sealing ring and an end cover; one end of the lower joint (3) is connected with a flushing nozzle (8) in a threaded manner; an assembling inner sleeve (4) is arranged in the outer shell (1); a rotary mandrel is arranged in the assembly inner sleeve (4) through a centralizing bearing (5) and a turbine (6); one end of the rotary mandrel is fixedly connected with the flushing nozzle (8) and the lower joint (3); one end of the assembling inner sleeve (4) is symmetrically provided with a cable receiver A (9) and a cable receiver B (10); an iron core (11) is arranged in an annular space between the other end of the assembling inner sleeve (4) and the shell (1); a conductive coil (12) is radially wound on the circumferential surface of the iron core (11); one end of the conductive coil (12) passes through the assembly inner sleeve (4) and enters the interior of the cable receiver A (9); the other end of the conductive coil (12) passes through the assembly inner sleeve (4) and enters the interior of the cable receiver B (10); the conductive coil (12) in the cable receiver B (10) passes through the assembly inner sleeve (4) and then enters the interior of the cable receiver A (9), and the two ends of the conductive coil (12) entering the cable receiver A (9) extend to the outer end through a coil inlet and outlet (14) arranged on the shell (1);
the circumference of the inner assembling sleeve (4) is in a ladder shape; one end of the assembling inner sleeve (4) is fixedly connected with the shell (1) through a fastening pin (17); a separation flange (13) is arranged on the circumferential surface of the assembly inner sleeve (4); an iron core (11) is arranged in an annular space between the assembling inner sleeve (4) at one side of the separation flange (13) and the outer shell (1); coil guide grooves (15) are symmetrically arranged on the circumferential surface of the inner assembly sleeve (4) at the other side of the separation flange (13); two ends of a conductive coil (12) wound on the iron core (11) enter the inside of the cable receiver A (9) and the inside of the cable receiver B (10) through coil guide grooves (15) respectively; a radial annular hole (16) is formed in the circumferential surface of the assembly inner sleeve (4) between the cable receiver A (9) and the cable receiver B (10), and the conductive coil (12) in the cable receiver B (10) enters the cable receiver A (9) through the radial annular hole (16);
the cable receiver A (9) and the cable receiver B (10) are respectively composed of a lead sleeve (18), a sealing outer sleeve (19) and a sealing inner sleeve (20); one end of the sealing coat (19) is fixedly provided with a lead sleeve (18); the other end of the sealing outer sleeve (19) is fixedly sleeved with a sealing inner sleeve (20); radial connecting holes (21) are correspondingly formed in the circumferential surfaces of the sealing inner sleeve (20) and the sealing outer sleeve (19); each radial connecting hole (21) is communicated with a radial annular hole (16) of the assembly inner sleeve (4);
the rotary mandrel consists of a shunt head (7), a mandrel body (22), a cutting coil (23) and a metal guide rod (24), wherein the mandrel body (22) is a stepped shaft, and one end of the mandrel body (22) is provided with the shunt head (7) through a joint body (25); a metal guide rod (24) is fixedly arranged in a joint body (25) at one side of the shunt head (7); the other end of the mandrel body (22) is fixedly connected with the lower joint (3) and the flushing nozzle (8); a plurality of flow holes (26) are uniformly formed in the circumference of the other end of the mandrel body (22); each flow hole (26) is communicated with the flushing nozzle (8); a plurality of T-shaped winding grooves (27) are uniformly formed in the thick end part of the mandrel body (22); the cutting coil (23) is transversely wound on the mandrel body (22) through each T-shaped winding groove (27); the two ends of the cutting coil (23) are respectively connected with the two ends of the metal guide rod (24) through the communication holes arranged on the mandrel body (22);
the T-shaped winding groove (27) corresponds to the iron core (11); the shunt head (7) is a conical body;
the flushing nozzle (8) consists of a nozzle body (28), a swirl nozzle (29), a forward nozzle (30) and a flow guide pipe (31); one end of the lower joint (3) is connected with a spray head body (28) in a threaded manner; the tail end of the nozzle body (28) is in a conical structure; a plurality of swirl nozzles (29) are uniformly distributed on the circumferential surface of the nozzle body (28); one end of the nozzle body (28) is fixedly provided with a forward nozzle (30); a flow guide pipe (31) is arranged in the spray head body (28); one end of the flow guide pipe (31) is fixedly connected with the mandrel body (22); the other end of the flow guide pipe (31) is connected with the forward nozzle (30) in a clamping way and is in a communicating state;
the flow guide pipe (31) is of an integrated structure; a plurality of cyclone branch pipes (32) are uniformly distributed on the circumferential surface of the flow guide pipe (31); the cyclone branch pipes (32) are arranged in an arc shape, and the arc angles and the arc directions of the cyclone branch pipes (32) are the same.
2. A spin rinse tool of controlled rotational speed as claimed in claim 1, wherein: the swirl nozzle (29) consists of a nozzle body (33), a baffle ring (34) and a swirl impeller (35); a nozzle body (33) is fixedly arranged on the circumferential surface of the nozzle body (28); a swirl impeller (35) is fixedly arranged in the nozzle body (33) through a baffle ring (34); one end of the rotational flow impeller (35) is arc-shaped; a plurality of swirl blades (36) are uniformly distributed on the circumference of the swirl impeller (35) in a spiral manner.
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| CN201810594078.9A CN108625804B (en) | 2018-06-11 | 2018-06-11 | Rotational flow flushing tool with controllable rotational speed |
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| CN201810594078.9A CN108625804B (en) | 2018-06-11 | 2018-06-11 | Rotational flow flushing tool with controllable rotational speed |
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| CN109296327B (en) * | 2018-12-04 | 2023-08-15 | 长江大学 | Duplex cyclone flushing tool |
| CN109577887B (en) * | 2019-01-28 | 2023-08-22 | 长江大学 | Oscillating horizontal well flushing tool |
| CN110295859A (en) * | 2019-08-06 | 2019-10-01 | 成都阿斯贝瑞科技有限公司 | A kind of rotation well-flushing tool with fluid damping deceleration device |
| CN110318695A (en) * | 2019-08-06 | 2019-10-11 | 成都阿斯贝瑞科技有限公司 | A kind of fluid damping is rotated in deceleration well-flushing tool |
| CN110984916B (en) * | 2020-02-04 | 2022-05-13 | 温州大学 | Turbine-driven thermal mass spraying and melting type flow guide wax scraping device |
| CN114198036B (en) * | 2021-11-29 | 2023-10-31 | 中海石油(中国)有限公司 | Flushing head, negative pressure sand flushing device with flushing head and use method of negative pressure sand flushing device |
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