CN116335595A - Magnetic focusing hydraulic sand blasting perforation fracturing device and method - Google Patents
Magnetic focusing hydraulic sand blasting perforation fracturing device and method Download PDFInfo
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- CN116335595A CN116335595A CN202111583203.4A CN202111583203A CN116335595A CN 116335595 A CN116335595 A CN 116335595A CN 202111583203 A CN202111583203 A CN 202111583203A CN 116335595 A CN116335595 A CN 116335595A
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- hydraulic sand
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- 238000005488 sandblasting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 53
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 47
- 230000009471 action Effects 0.000 claims description 7
- 241000251468 Actinopterygii Species 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 9
- 230000002776 aggregation Effects 0.000 abstract description 6
- 238000004220 aggregation Methods 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 8
- 230000003628 erosive effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 239000003082 abrasive agent Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000006249 magnetic particle Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002122 magnetic nanoparticle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a magnetic focusing hydraulic sand blasting perforation fracturing device and a method, wherein the device comprises a pipe body, a spray gun is arranged in the pipe body, and an electromagnetic assembly is sleeved on the spray gun; when the electromagnetic assembly is powered on, the electromagnetic assembly generates a first magnetic field consistent with the axial direction of the spray gun; the side wall of the spray gun is provided with a plurality of nozzles; a magnetic component is arranged on the nozzle at one end connected with the spray gun; the magnetic assembly generates a second magnetic field consistent with the axial direction of the nozzle; when the device is used for sand blasting perforation and fracturing, the interior of the spray gun is provided with a magnetic fluid abrasive. The device utilizes the acceleration effect of the magnetic field on the magnetic abrasive and the aggregation effect of the magnetic piece on the fluid to effectively improve jet impact performance and enhance jet aggregation degree, thereby reducing the wear rate of the nozzle, improving the reliability of the nozzle and realizing accurate perforation fracturing effect.
Description
Technical Field
The invention belongs to the technical field of oil extraction equipment, and relates to a magnetic focusing hydraulic sand blasting perforation fracturing device and method.
Background
The hydraulic sand blasting perforation fracturing technology is that liquid mixed with a certain abrasive is pressurized by a fracturing truck and pumped to a stratum through an oil pipe, the abrasive liquid forms high-speed sand jet flow at a perforation nozzle, a sleeve, a cement ring and near-well stratum rock are impacted to form perforation holes with a certain diameter and depth, and propping agents can be filled into a fracturing crack during subsequent fracturing, so that sand adding operation is completed. Because the nozzles of the perforator adopted at present are usually directly fixed on the pipe column, in hydraulic sand blasting construction, the high-speed movement of sand-containing liquid inevitably causes the erosion and abrasion of the nozzles to be aggravated, so that the aperture of the nozzles is increased, the perforation pressure provided by an original pump set cannot reach the range requirement, jet flow diverges, perforation positioning is inaccurate, and the reliability of the nozzles is greatly reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the magnetic focusing hydraulic sand blasting perforation fracturing device and method, thereby reducing the abrasion rate of a nozzle, improving the jet impact performance, enhancing the jet concentration degree and realizing the accurate perforation fracturing effect.
The invention is realized by the following technical scheme:
a magnetic focusing hydraulic sand blasting perforation fracturing device comprises a pipe body, wherein a spray gun is arranged in the pipe body, and an electromagnetic assembly is sleeved on the spray gun; when the electromagnetic assembly is powered on, the electromagnetic assembly generates a first magnetic field consistent with the axial direction of the spray gun;
the side wall of the spray gun is provided with a plurality of nozzles; a magnetic component is arranged on the nozzle at one end connected with the spray gun; the magnetic assembly generates a second magnetic field consistent with the axial direction of the nozzle;
the interior of the lance is used for setting a magnetic fluid abrasive.
Preferably, the inside of the pipe body comprises a first cavity part and a second cavity part, the electromagnetic assembly is arranged on the first cavity part, and the nozzles are arranged on the second cavity part.
Preferably, the first cavity part is provided with a threaded pipe, the inner wall of the first cavity part is provided with an internal thread, the outer wall of the threaded pipe is provided with an external thread, and the first cavity part is in threaded connection with the threaded pipe; the electromagnetic assembly is arranged inside the threaded pipe.
Preferably, a plurality of nozzle holders are arranged at intervals along the axial direction of the second cavity part; the plurality of nozzles are arranged in the plurality of nozzle supports.
Preferably, the inner wall of the spray gun is provided with internal threads.
Preferably, a guide piece is arranged on the spray gun at one end connected with the oil pipe, and the guide piece is in threaded connection with the spray gun.
Preferably, the magnetic component is a combination of an axial magnetization permanent magnet and a radial magnetization permanent magnet.
Preferably, the material of the magnetic component adopts neodymium iron boron.
Preferably, the inner wall of the nozzle is of a fish scale structure.
The magnetic focusing hydraulic sand blasting perforation fracturing method adopts any one of the magnetic focusing hydraulic sand blasting perforation fracturing devices, and is carried out by the following steps:
s1: the magnetic focusing hydraulic sand blasting perforation fracturing device is put into a construction target reservoir;
s2: pumping a magnetic fluid abrasive into the spray gun;
s3: switching on a power supply of an electromagnetic assembly, wherein the electromagnetic assembly generates a magnetic field consistent with the axial direction of the spray gun, and when the magnetic fluid abrasive flows through the spray gun, the first magnetic field pushes the magnetic fluid abrasive to accelerate transmission in the spray gun;
s4: when the magnetic fluid abrasive flows through the nozzle, the jet flow beam is focused under the action of a second magnetic field generated by the magnetic assembly, and the perforation fracturing process of the perforation layer is completed.
Compared with the prior art, the invention has the following beneficial technical effects:
a magnetic focusing hydraulic sand blasting perforation fracturing device is characterized in that magnetic fluid abrasive is added into jet flow, and an electromagnetic assembly which can generate an external magnetic field consistent with the axial direction of a spray gun is arranged at the same time, the electromagnetic assembly can effectively apply the external magnetic field to the magnetic fluid abrasive in the spray gun to accelerate the magnetic fluid abrasive, and the movement rate of the magnetic fluid abrasive in a nozzle can be assisted to be propelled by regulating and controlling the magnetic field intensity. In addition, the magnetic component is arranged at the inlet of the nozzle, so that the aggregation degree of jet flow can be improved, the abrasion of abrasive materials to the jet component is effectively relieved, the jet rate and aggregation degree of jet flow can effectively meet the process requirements, the reliability of the nozzle is improved, and the accurate perforation fracturing effect is achieved.
Furthermore, the inner cavity of the spray gun is a spiral channel, so that the disturbance of the magnetic fluid abrasive in the spray gun is aggravated, and the movement rate of the magnetic fluid abrasive is further improved.
Furthermore, the flow guiding piece can smoothly convert the axial flow of the fluid into rotary flow, so that the erosion of the fluid to the spray gun is reduced.
Furthermore, the magnetic component is a combination of the axial magnetization permanent magnet piece and the radial magnetization permanent magnet piece, so that the aggregation degree of the fluid is effectively improved, and the erosion of the fluid to the nozzle is reduced.
Furthermore, the inner wall of the nozzle is of a fish scale-shaped structure, and the fish scale-shaped rough inner wall can improve the wear resistance and erosion resistance of the nozzle.
A magnetic focusing hydraulic sand blasting perforation fracturing method is characterized in that a first magnetic field generated by an electromagnetic assembly accelerates magnetic fluid abrasive materials, a second magnetic field generated by the magnetic assembly gathers the magnetic fluid abrasive materials, the method is convenient to use and convenient to operate, the abrasion rate of a nozzle is reduced, the jet impact performance is improved, the jet aggregation degree is enhanced, and the accurate perforation fracturing effect is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the device of the present invention.
Wherein: 1. a threaded pipe 2, an upper centralizer 3, a flow guiding piece 4, a spray gun 5, an electromagnetic component 6, internal threads 7, a nozzle support 8, a nozzle 9 and a nozzle pressing cap, 10, a damping layer, 11, an anti-erosion cover plate, 12, a sealing ring, 13, a magnetic component, 14, a lower centralizer, 15, a guide shoe, 16 and a magnetic fluid abrasive; 17. a tube body 171, a first cavity portion 172, and a second cavity portion.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
the nanometer magnetic fluid, also called magnetic liquid, is a stable colloid solution with nanometer magnetic particles coated with surfactant or charged to make nanometer magnetic particles uniformly dispersed in base liquid. Under the action of an externally applied magnetic field, magnetic particles in the magnetic liquid are rapidly magnetized, move and gather or are arranged into a chain structure under the action of magnetic force. When the magnetic field is removed, the magnetic dipole moment of the magnetic particles in the magnetic fluid is instantaneously and randomly distributed, the volume magnetization is rapidly reduced to zero, and the fluid has good fluidity. Along with the development of magnetic fluid, the magnetic fluid propulsion technology has also been developed, and researches show that the magnetic fluid propulsion technology is used for abrasive jet and has remarkable auxiliary effect on jet effect. When the magnetic fluid abrasive material flows through the flow channel around which the coil is wound, a moving magnetic field is generated on the magnetic fluid in the flow channel, the moving magnetic field generates induced current on the magnetic fluid, and the magnetic fluid is accelerated to advance in the flow channel under the action of the double functions of the current and the magnetic field. In addition, the magnetic nano particles in the magnetic fluid also have special good tribological characteristics of resisting abrasion, reducing friction resistance, high bearing capacity and the like, and the abrasion of the abrasive on the spraying component can be effectively relieved by mixing the magnetic fluid into the abrasive.
Therefore, the magnetic fluid is mixed into the abrasive to form uniform suspension, the jet impact performance is assisted and improved under the dual action of an external electric field and a magnetic field, and meanwhile, the jet concentration degree is enhanced by controlling the magnetic field strength, so that the accurate perforation fracturing effect is achieved.
As shown in fig. 1, the magnetic focusing hydraulic sand blasting perforation fracturing device comprises a threaded pipe 1, an upper centralizer 2, a guide piece 3, a spray gun 4, an electromagnetic assembly 5, a nozzle support 7, a nozzle 8, a nozzle pressing cap 9, a shock absorption layer 10, an anti-erosion cover plate 11, a sealing ring 12, a magnetic assembly 13, a lower centralizer 14, a guide shoe 15, a magnetic fluid abrasive 16, a pipe body 17 and a control device of the device. The guiding piece 3 can be a guiding device, the electromagnetic component 5 can be an electromagnet, the guiding piece 3 is arranged on the spray gun 4 and connected with one end of the oil pipe, the guiding piece 3 is in threaded connection with the spray gun 4, and the magnetic fluid abrasive 16 is guided to flow along the axial direction and is smoothly converted into rotary flow.
The tube 17 includes a first cavity 171 and a second cavity 172, the electromagnetic assembly 5 is disposed in the first cavity 171, and the nozzles 8 are disposed in the second cavity 172. The threaded pipe 1 is arranged in the first cavity part 171, the inner wall of the first cavity part 171 is provided with internal threads, the outer wall of the threaded pipe 1 is provided with external threads, and the first cavity part 171 is in threaded connection with the threaded pipe 1; the electromagnetic assembly 5 is arranged inside the threaded tube 1.
The spray gun 4 is internally provided with a hollow internal spiral flow passage and is provided with an internal thread 6, the pitch is preferably 60mm, the groove depth is preferably 4mm, and the groove width is preferably 10mm. The fluid in the spiral channel is added with magnetic nano particles to form a thermodynamically stable magnetic fluid abrasive, and magnetic fluid in the abrasive is subjected to double action by a magnetic field to generate axial pushing force, so that the magnetic fluid abrasive is accelerated through the spiral channel, the impact rate is improved, and the jet collimation is improved.
The electromagnetic component 5 is sleeved on the outer wall of the spray gun 4; the electromagnetic assembly 5 is electrically connected with the control device; when the electromagnetic assembly 5 is powered on, the electromagnetic assembly 5 generates a first magnetic field consistent with the axial direction of the spray gun 4; the spray nozzles 8 are arranged on the side wall of the spray gun 4, and the magnetic component 13 is arranged on one end of the spray nozzle 8, which is connected with the spray gun 4; the magnetic component 13 generates a second magnetic field consistent with the axial direction of the nozzle 8, the magnetic component 13 can be a permanent magnet ring, the material is neodymium iron boron, and the combination structure of the axial magnetization permanent magnet ring and the radial magnetization permanent magnet ring is preferable to provide a uniform axial magnetic field for the magnetic fluid abrasive 16, so that the concentration degree of the abrasive flowing through the axial center of the nozzle 8 is improved, and the wall surface abrasion at the inlet of the nozzle is reduced.
The nozzle support 7 is embedded on the body of the pipe body 17, is preferably arranged in the second cavity 172, is uniformly distributed along the circumferential direction and the axial direction of the spray gun 4, and can be 6 in number, and the nozzle 8 is in threaded connection with the nozzle support 7, so that when the nozzle is damaged, a new nozzle can be replaced in time. Preferably, the constant-speed nozzle with the phase angle of 180 degrees is adopted, the nozzle material is preferably ceramic, and the erosion and abrasion resistance of the nozzle is improved.
The nozzle 8 is preferably an equi-speed nozzle having a phase angle of 180 degrees, and the inner wall surface of the nozzle is surface-treated to form a rough inner wall similar to a fish scale, so that the wear resistance and erosion resistance of the nozzle can be improved.
The nozzle presses cap 9 to set up in nozzle 8 efflux exit, and buffer layer 10 sets up between nozzle press cap 9 and nozzle 8, and buffer layer 10 adopts the viscose to be connected with nozzle 8, slows down the nozzle and produces vibrations when the efflux, and anti-erosion apron 11 sets up in the free side of nozzle press cap 9, and anti-erosion apron adopts the carbide to make, prevents that the detritus backward flow from causing the erosion to the nozzle to destroy.
The upper centralizer 2 and the lower centralizer 14 are spiral centralizers, so that the stability of the oil pipe is ensured.
The magnetic component 13 is a combination of an axial magnetization permanent magnet and a radial magnetization permanent magnet.
The guide shoe 15 is tapered, and one end is connected with the lower centralizer 14, so that the sand blasting tool can smoothly go down into the well and block the lower end of the spray gun.
The outside of spray gun 4 is located to body 17 cover, and the one end of body 17 is equipped with and is equipped with the cavity structure, electromagnetic assembly 5 set up in cavity structure department. The threaded pipe 1 is in threaded connection with the cavity structure, and the electromagnetic assembly 5 is arranged inside the threaded pipe 1.
When the device is used for sand blasting perforation fracturing, a magnetic fluid abrasive 16 is added to the fluid inside the gun 4.
The magnetic focusing hydraulic sand blasting perforation fracturing method adopts the device and is carried out by the following steps:
s1: the device and the cable connected with the electromagnet 5 are put into a construction target reservoir by utilizing an oil pipe;
s2: pumping uniformly mixed suspended magnetic fluid abrasive 16 into the internal spiral spray gun 4 through an oil pipe and a flow director 3;
s3: when the electromagnetic assembly 5 is powered on and the magnetic fluid abrasive 16 flows through the internal spiral spray gun, the internal spiral channel aggravates the disturbance of the magnetic fluid abrasive 16 in the channel, and the magnetic field generated by the electromagnet pushes the magnetic fluid abrasive 16 to accelerate. By controlling the magnetic field strength, control over the spray concentration and velocity of the magnetic fluid abrasive 16 can be achieved;
s4: the magnetic fluid abrasive 16 passes through the nozzle 4, focuses jet flow beams under the action of an axial uniform magnetic field of the magnetic assembly 13, and impacts the broken sleeve, the cement ring and the rock reservoir to complete perforation of the first perforation layer;
s5: after perforation operation is completed, the power supply is turned off, the magnetic field is removed, and cyclic well flushing is started;
s6: after well flushing is completed, pumping fracturing fluid into the first perforation layer to complete sand fracturing of the first target reservoir;
s7: moving an oil pipe, conveying the injection tool to the next target reservoir zone, and repeating the steps S2-S6 until perforation fracturing of all target layers is completed;
s8: after completion of the perforating fracturing operation, coiled tubing is reeled out of the well onto a large diameter drum for migration into the next reservoir zone.
According to the invention, the nano magnetic fluid is added to enable the abrasive to conduct magnetic conduction, an electromagnetic device is designed to apply an external magnetic field to the abrasive slurry, the movement rate of the magnetic fluid abrasive in the nozzle can be assisted to be propelled by adjusting and controlling the magnetic field intensity, the jet flow concentration degree is improved, and a high-pressure pump set is not required to be additionally arranged. The sand blasting perforation fracturing tool provided by the invention can be used for sectional perforation, and multi-layer sectional perforation can be simultaneously carried out by one pipe column, so that the construction cost is reduced; according to the invention, mechanical packing is not required by a packer or a bridge plug, automatic high-pressure hydrodynamic packing is realized, repeated fracturing can be continuously performed, and sand blocking probability is reduced; the internal flow passage of the spray gun is set to be an internal spiral passage, so that the structure and the material of the spray nozzle are optimized, the service life of the spray nozzle is prolonged, the fracturing yield and injection are realized, and the perforation precision and staged fracturing efficiency are improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The magnetic focusing hydraulic sand blasting perforation fracturing device is characterized by comprising a pipe body (17), wherein a spray gun (4) is arranged in the pipe body (17), and an electromagnetic assembly (5) is sleeved on the spray gun (4); when the electromagnetic assembly (5) is powered on, the electromagnetic assembly (5) generates a first magnetic field consistent with the axial direction of the spray gun (4);
the side wall of the spray gun (4) is provided with a plurality of nozzles (8); a magnetic component (13) is arranged on the nozzle (8) and at one end connected with the spray gun (4); -the magnetic assembly (13) generates a second magnetic field coinciding with the axial direction of the nozzle (8);
the interior of the lance (4) is used for setting a magnetic fluid abrasive (16).
2. The magnetic focusing hydraulic sand blasting perforation fracturing device according to claim 1, wherein the interior of the pipe body (17) comprises a first cavity part (171) and a second cavity part (172), the electromagnetic assembly (5) is arranged on the first cavity part (171), and the plurality of nozzles (8) are arranged on the second cavity part (172).
3. The magnetic focusing hydraulic sand blasting perforation fracturing device according to claim 2, wherein the first cavity part (171) is provided with a threaded pipe (1), the inner wall of the first cavity part (171) is provided with internal threads, the outer wall of the threaded pipe (1) is provided with external threads, and the first cavity part (171) is in threaded connection with the threaded pipe (1); the electromagnetic assembly (5) is arranged inside the threaded pipe (1).
4. A magnetically focused hydraulic sand blasting perforating fracturing device according to claim 2, characterized in that several nozzle holders (7) are arranged at intervals along the axial direction of the second cavity part (172); the nozzles (8) are arranged in the nozzle supports (7).
5. A magnetically focused hydraulic sand blasting perforation fracturing device according to claim 1, wherein the inner wall of the lance (4) is provided with an internal thread (6).
6. The magnetic focusing hydraulic sand blasting perforation fracturing device according to claim 1, wherein a guide piece (3) is arranged on one end, connected with an oil pipe, of the spray gun (4), and the guide piece (3) is in threaded connection with the spray gun (4).
7. A magnetically focused hydraulic sand blasting perforation fracturing device according to claim 1, wherein the magnetic assembly (13) is a combination of axially magnetized permanent magnets and radially magnetized permanent magnets.
8. A magnetically focused hydraulic sand blasting perforation fracturing device according to claim 1, wherein the magnetic component (13) is made of neodymium iron boron.
9. The magnetic focusing hydraulic sand blasting perforation fracturing device according to claim 1, wherein the inner wall of the nozzle (8) is of a fish scale structure.
10. A magnetic focusing hydraulic sand blasting perforation fracturing method, which is characterized by adopting the magnetic focusing hydraulic sand blasting perforation fracturing device as claimed in any one of claims 1 to 9, and comprising the following steps:
s1: the magnetic focusing hydraulic sand blasting perforation fracturing device is put into a construction target reservoir;
s2: pumping a magnetic fluid abrasive (16) into the lance (4);
s3: switching on a power supply of an electromagnetic assembly (5), wherein the electromagnetic assembly (5) generates a magnetic field consistent with the axial direction of the spray gun (4), and when the magnetic fluid abrasive (16) flows through the spray gun (4), the first magnetic field pushes the magnetic fluid abrasive (16) to accelerate transmission in the spray gun (4);
s4: when the magnetic fluid abrasive (16) flows through the nozzle (8), the jet flow beam is focused under the action of a second magnetic field generated by the magnetic assembly (13), and the perforation fracturing process of the perforation layer is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111583203.4A CN116335595A (en) | 2021-12-22 | 2021-12-22 | Magnetic focusing hydraulic sand blasting perforation fracturing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111583203.4A CN116335595A (en) | 2021-12-22 | 2021-12-22 | Magnetic focusing hydraulic sand blasting perforation fracturing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116335595A true CN116335595A (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111583203.4A Pending CN116335595A (en) | 2021-12-22 | 2021-12-22 | Magnetic focusing hydraulic sand blasting perforation fracturing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116335595A (en) |
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2021
- 2021-12-22 CN CN202111583203.4A patent/CN116335595A/en active Pending
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