CN115749692A - Single-channel multistage direction-control ejector, fracturing device and fracturing method - Google Patents
Single-channel multistage direction-control ejector, fracturing device and fracturing method Download PDFInfo
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- CN115749692A CN115749692A CN202211490462.7A CN202211490462A CN115749692A CN 115749692 A CN115749692 A CN 115749692A CN 202211490462 A CN202211490462 A CN 202211490462A CN 115749692 A CN115749692 A CN 115749692A
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Abstract
The invention provides a single-channel multistage direction-control ejector, which comprises a pipe body and a plurality of nozzles, wherein the pipe body is provided with a first through hole along the axial direction of the pipe body, each nozzle is arranged on the side wall of the pipe body along the axial direction of the pipe body, the nozzles are communicated with the first through hole, the single-channel multistage direction-control ejector also comprises a plurality of sliding sleeves, a first elastic piece, a first clamping table and a plurality of plugging balls, the sliding sleeves are adjacently abutted and arranged in the first through hole, the outer walls of the sliding sleeves are in contact with the inner wall of the pipe body, the inner diameters of the sliding sleeves are gradually reduced along the axial direction of the pipe body, and the nozzles are arranged on the side wall of the pipe body at equal intervals and are respectively positioned at the positions of the sliding sleeves corresponding to the pipe body; the first clamping table is arranged at one end of the pipe body with the reduced inner diameter of the sliding sleeve, the first elastic piece is arranged in the pipe body, one end of the first elastic piece is in abutting connection with the sliding sleeve, the other end of the first elastic piece is connected with the first clamping table, and the maximum elastic deformation of the first elastic piece is greater than the axial length of the sliding sleeve and is smaller than the axial length between the two nozzles; the quantity of shutoff ball and sliding sleeve one-to-one configuration, and each shutoff ball can correspond the card and locate in the sliding sleeve.
Description
Technical Field
The invention belongs to the field of coal mining, and particularly relates to a single-channel multistage direction-control ejector, a fracturing device and a fracturing method.
Background
In coal mining, mine gas disasters are one of the main disasters threatening the safe production of coal mines. At present, the most common and effective technical means for mine gas control is coal seam gas extraction, which extracts gas existing in a coal seam in advance, reduces the gas content in the coal seam and meets the requirement of safe and efficient mining of coal mines. Most coal seams in China are broken and soft, low in air permeability and difficult to drill and form holes, a coal seam top (bottom) plate is easy to form the holes, but the crack initiation direction of a fractured crack is difficult to control, a directional perforating device is an important means for ensuring the crack initiation to the coal seam, and directional fracturing is an important means and development direction for future coal seam gas control. In the prior art, a small part of perforating bullet perforating technologies are adopted, but the technology has high instantaneous construction pressure, great damage to a production casing pipe, compaction effect on a reservoir stratum and great adverse effect. In addition, the staged hydraulic fracturing applied in the prior art is a method for injecting high-pressure fluid into a coal rock body hole closed space formed by a hole sealing tool in a short time through a hole internal pipe column by using a high-pressure pump set so as to break the coal rock body and generate a crack network to form a gas channel or weaken the strength of the coal rock body, and is a novel technology in the control fields of coal mine underground gas permeability increase, coal rock body weakening, strong mine pressure and the like. Therefore, the method is a main measure for controlling the scale of the fracturing crack and improving the fracturing effect at the present stage by forming the prefabricated crack in the fracturing stage range through spraying and then performing staged fracturing. The existing underground coal mine jet fracturing process comprises the following steps: a single-channel multistage direction control ejector is fed into a hole through a pipe column, the single-channel multistage direction control ejector is ejected at a designed position, the single-channel multistage direction control ejector is withdrawn after the single-channel multistage direction control ejector is completed, and the single-channel multistage direction control ejector is fed into a fracturing tool through the pipe column to perform staged hydraulic fracturing construction. The method has the following disadvantages: complicated construction procedures, low injection position precision, undefined injection direction, uncontrollable injection scale and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a single-channel multistage direction-controlled injector, a fracturing device and a fracturing method, and solve the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a single-channel multistage direction control ejector comprises a pipe body and a plurality of nozzles, wherein the pipe body is provided with a first through hole along the axial direction of the pipe body, each nozzle is arranged on the side wall of the pipe body along the axial direction of the pipe body and is communicated with the first through hole, and the single-channel multistage direction control ejector also comprises a plurality of sliding sleeves, a first elastic piece, a first clamping table and a plurality of plugging balls;
each sliding sleeve is adjacently abutted and arranged in the first through hole, the outer wall of each sliding sleeve is contacted with the inner wall of the pipe body, the inner diameter of each sliding sleeve is gradually reduced along the axial direction of the pipe body, and each nozzle is arranged on the side wall of the pipe body at equal intervals and is respectively positioned at the position of each sliding sleeve corresponding to the pipe body;
the first clamping table is arranged at one end of the pipe body sliding sleeve with the reduced inner diameter, the first elastic piece is arranged in the pipe body, one end of the first elastic piece is in abutting connection with the sliding sleeve, the other end of the first elastic piece is connected with the first clamping table, and the maximum elastic deformation of the first elastic piece is larger than the axial length of the sliding sleeve and smaller than the axial length between the two nozzles;
the quantity of shutoff ball and sliding sleeve one-to-one configuration, and each shutoff ball can correspond the card and locate in the sliding sleeve.
Preferably, the single-channel multistage steering injector further comprises:
the second mounting table is arranged at one end, away from the first clamping table, of the pipe body, the second mounting table is provided with a second through hole along the axial direction of the second mounting table, and the second mounting table is connected with the sliding sleeve in an abutting mode.
Preferably, each adjacent sliding sleeve is connected through a second elastic piece.
Preferably, a plurality of nozzles are arranged on the side wall of the pipe body corresponding to each sliding sleeve along the circumferential direction of the side wall.
Preferably, each sliding sleeve and the pipe body are arranged in a non-rotatable mode.
Preferably, the pipe body is provided with a sliding groove, the sliding sleeve is provided with a protrusion corresponding to the sliding groove, and the protrusion is matched with the sliding groove.
Preferably, the central axis collineation setting of body, sliding sleeve, first elastic component, first ka tai and second mount table.
A fracturing device comprises a single-channel multistage direction-control ejector, and further comprises a packer, a constant-pressure interceptor, a fracturing string and a guide shoe which are sequentially connected; the single-channel multistage direction-control ejector is respectively connected with the packer and the constant-pressure interceptor.
A fracturing method, which relies on a fracturing device to perform the operation;
the method specifically comprises the following steps:
step 1, determining a hydraulic fracturing layer and a fracturing influence scale according to the type of a treatment problem, and determining a jet channel to be opened to carry out directional drilling construction according to the fracturing influence range to form a fracturing drilled hole;
step 2, the fracturing device is sent to a fracturing drill hole design position and is accurately sent to the design position through a guide shoe;
step 3, selecting a corresponding plugging ball according to needs, pushing the plugging ball to reach the inside of a sliding sleeve matched with the plugging ball under the action of fracturing fluid and jet fluid, moving the sliding sleeve at the position downstream to enable a nozzle to be communicated with the first through hole, and opening the nozzle to release the jet fluid;
and 4, stopping supply of the fracturing fluid and the injection fluid after injection is finished, recovering the free state of the first elastic part to rebound the high-density ball, recovering the high-density ball, dragging the equipment to the next injection fracturing section after the first-stage construction is finished, starting the next fracturing construction, and sequentially circulating until the design fracturing is finished.
Compared with the prior art, the invention has the following technical effects:
the injection liquid and the fracturing liquid are injected through the first through hole in the pipe body under the action of the blocking ball and the sliding sleeve, the injection liquid and the fracturing liquid are pushed by the injection liquid and the fracturing liquid to move in the pipe body, a nozzle arranged on the side wall of the pipe body corresponding to the sliding sleeve is communicated with a first channel, the fracturing liquid is ejected from the nozzle, the aim of accurate fracturing is fulfilled, the first clamping table is abutted against a first elastic piece to limit the elastic range of the first elastic piece, when the injection liquid and the fracturing liquid are released after the fracturing injection is finished, and the first elastic piece is restored to a free state, the elastic potential energy is released, the power is provided to push the sliding sleeve to the original position, the self-resetting aim of the sliding sleeve is fulfilled, and the accurate treatment work is achieved under the condition that the single-channel injection and fracturing integrated operation is realized; in actual operation, the construction period can be greatly reduced, the construction precision is improved, the operation is convenient and fast, and the labor and equipment cost is reduced; has higher practical value and popularization value.
Drawings
FIG. 1 is a cross-sectional view of a single-channel, multi-stage steering ejector of the present invention;
FIG. 2 is a schematic diagram of the operating state of the single-channel multistage steering ejector of the present invention;
FIG. 3 is a schematic representation of the operating state of the single channel multistage pilot injector of the present invention;
FIG. 4 is a perspective view of a single channel multi-stage steering ejector of the present invention;
FIG. 5 is a schematic diagram of the overall configuration of the fracturing apparatus of the present invention;
fig. 6 is a schematic view of the fracturing operation state of the fracturing device of the present invention;
fig. 7 is a schematic view of the fracturing operation state of the fracturing unit of the present invention;
fig. 8 is a fracture cross-sectional view of the fracturing apparatus of the present invention;
FIG. 9 is a multi-directional injection schematic of the single channel multi-stage steering injector of the present invention;
FIG. 10 is a schematic diagram of the single injection of the single channel multi-stage pilot injector of the present invention;
FIG. 11 is a schematic fracturing diagram of a comparative example of the present invention;
FIG. 12 is a side ceiling area schematic of example 3 of the present invention;
FIG. 13 is an illustration of the range of influence of the hydraulic fracture ellipsoid for example 3 of the present invention;
figure 14 is a schematic view of the artificial fracture line position of example 3 of the present invention;
FIG. 15 is a schematic configuration diagram of an ejector of embodiment 3 of the invention;
figure 16 is a schematic representation of a fracture borehole plan of example 3 of the present invention;
FIG. 17 is a schematic view of an artificial fracture line forming process of example 3 of the present invention;
the meaning of the individual reference symbols in the figures is:
100-pipe body, 110-nozzle, 3-first through hole, 200-sliding sleeve, 400-first elastic element, 700-first clamping table, 600-second mounting table, 9-second through hole, 1000-packer, 1200-constant pressure interceptor, 1100-fracturing pipe column, 900-guide shoe and 800-single-channel multistage control ejector.
The present invention will be explained in further detail with reference to examples.
Detailed Description
The following embodiments are given as examples of the present invention, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are included in the protection scope of the present invention.
As used herein, directional terms such as "circumferential," "radial," "axial," "upstream" and "downstream" are intended to correspond to a particular direction on the page in the drawings or to a corresponding direction in the space shown in the drawings.
Example 1:
a single-channel multistage direction-control ejector comprises a tube body 100 and a plurality of nozzles 110, wherein the tube body 100 is provided with a first through hole along the axial direction of the tube body 100, each nozzle 110 is arranged on the side wall of the tube body 100 along the axial direction of the tube body 100, the nozzles 110 are communicated with the first through hole, the single-channel multistage direction-control ejector further comprises a plurality of sliding sleeves 200, a first elastic piece 400, a first clamping table 700 and a plurality of blocking balls 300,
each sliding sleeve 200 is adjacently abutted and arranged in the first through hole, the outer wall of each sliding sleeve 200 is contacted with the inner wall of the pipe body 100, the inner diameter of each sliding sleeve 200 is gradually reduced along the axial direction of the pipe body 100, and each nozzle 110 is arranged on the side wall of the pipe body 100 at equal intervals and is respectively positioned at the position of each sliding sleeve 200 corresponding to the pipe body 100;
the first clamping table 700 is arranged at one end of the pipe body 100 with the reduced inner diameter of the sliding sleeve, the first elastic element 400 is arranged in the pipe body 100, one end of the first elastic element is connected with the sliding sleeve 200 in an abutting mode, the other end of the first elastic element is connected with the first clamping table 700, and the maximum elastic deformation of the first elastic element 400 is larger than the axial length of the sliding sleeve and smaller than the axial length between two nozzles;
the number of the blocking balls 300 is configured corresponding to the sliding sleeve 200 one by one, and each blocking ball 300 can be correspondingly clamped in the sliding sleeve.
In the embodiment, the injection liquid and the fracturing liquid are enabled to run in the same loop under single-channel operation of a first through hole in a pipe body, injection-fracturing integrated operation is realized, meanwhile, a plurality of sliding sleeves with gradually reduced inner diameters are arranged in the pipe body, different plugging balls capable of being clamped in the sliding sleeves are matched according to the inner diameters of the sliding sleeves, the injection liquid and the fracturing liquid are injected through the first through hole under the action of the plugging balls and the sliding sleeves, the injection liquid and the fracturing liquid push the sliding sleeves where the plugging balls are located to move in the pipe body, nozzles arranged on the side walls of the pipe body corresponding to the sliding sleeves are communicated with a first channel, the fracturing liquid is injected from the nozzles, the aim of accurate fracturing is realized, the elastic range of a first elastic piece is limited by abutting the first clamping table and the first elastic piece, when the fracturing injection liquid and the fracturing liquid are released after the injection is finished, and the first elastic piece is recovered to a free state, the elastic potential energy is released, the power is provided to push the sliding sleeves to the original position, the aim of automatic self-resetting of the sliding sleeves is realized, the work of the next cycle is convenient for realizing the accurate treatment; in actual operation, the construction period can be greatly reduced, the construction precision is improved, the operation is convenient and fast, and the labor and equipment cost is reduced; has higher practical value and popularization value.
Wherein, the purpose that the maximum elastic deformation of the first elastic member 400 is greater than the axial length of the sliding sleeve and less than the axial length between the two nozzles is as follows: the nozzle that makes the axial displacement of sliding sleeve can correspond the position exposes, guarantees that nozzle and first through-hole communicate with each other, and only opens the nozzle that corresponds the position when guaranteeing this sliding sleeve and remove, need not hit the nozzle of next stage, has realized accurate control, and the shutoff ball adopts the spheroid structure of high density.
As a preferable solution of this embodiment, the single-channel multistage steering injector further includes:
the second installation platform 600, the second installation platform 7 are located the body 100 and keep away from the one end of first ka tai 700, and the second installation platform 600 sets up the second through-hole along its axial, and the second installation platform 600 is contradicted with sliding sleeve 200 and is connected.
Wherein, second mount table 600 can prevent that first elastic component when release elastic potential energy promotes the sliding sleeve and resets, and the sliding sleeve atress is too big and stretch out the body, has improved the accuracy that the sliding sleeve resets.
As a preferable scheme of this embodiment, each of the sliding sleeves 200 adjacently disposed is connected to each other through the second elastic member 500.
Wherein, two sliding sleeves that adjacent set up can keep stable connection under the effect of second elastic component, and the sliding sleeve of avoiding the nozzle upper reaches that corresponds takes place to slide, and after the release of injection liquid finishes, two adjacent sliding sleeves of alternate segregation still can offset automatically under the elastic force effect of second elastic component, and in this embodiment, spring or shell fragment structure are chooseed for use to the second elastic component, and the hookup location of second elastic component is suitable in order to avoid relevant position nozzle position.
As a preferable scheme of this embodiment, a plurality of nozzles are disposed on the sidewall of the pipe body 100 corresponding to each sliding sleeve 200 along the circumferential direction thereof.
Wherein, set up a plurality of nozzles along body 100 axial, can realize the operating mode of multidirectional injection, and the purpose is: the direction-controllable jet fracturing construction can be carried out according to the actual working condition requirements, the cracks are prefabricated, and the hydraulic fracturing construction effect that the crack direction is controllable and the weakening scale is controllable is achieved.
As a preferable scheme of this embodiment, each sliding sleeve 200 and pipe body 100 are provided in a non-rotatable manner, so that stability of the injector can be improved, and injection efficiency can be improved.
As a preferred scheme of this embodiment, set up the spout on body (100), sliding sleeve (200) sets up the arch with its corresponding position, protruding and spout phase-match satisfy spout and body (100) can not be relative purpose when being under construction, and the spout does not influence the work of nozzle with bellied setting.
As a preferable scheme of this embodiment, the central axes of the pipe body 100, the sliding sleeve 200, the first elastic member 400, the first clamping table 700 and the second mounting table 600 are arranged in a collinear manner, so that the overall stability of the device is improved, and the working efficiency of this embodiment is further improved.
Example 2:
a fracturing device, which comprises the single-channel multistage steering control ejector in the embodiment 1, and further comprises a packer 1000, a constant-pressure cut-off device 1200, a fracturing string 1100 and a guide shoe 900 which are connected in sequence; the single-channel multistage direction-control ejector 800 is respectively connected with the packer 1000 and the constant-pressure interceptor 1200.
The fracturing device of the embodiment can adopt single-channel operation to enable the jet fluid and the fracturing fluid to run in the same loop, so as to realize jet-fracturing integrated operation, wherein the jet angle control assembly in the tube body of the jet arranged in the single-channel multistage direction-control jet can control the corresponding nozzle to be opened, so that the jet fluid is released to realize accurate fracturing construction; the high-density balls with different diameters are put into the corresponding sliding sleeves, and the sliding sleeves can move to one side of the pipe body under the action of the injection liquid after being blocked by the high-density balls, so that the corresponding nozzles are opened; after the release of the injection liquid is finished, the sliding sleeve automatically resets under the elastic action of the resetting elastic part; the aim of controlling the spraying direction and scale by putting is achieved, so that the development direction and range of the fracturing crack are controlled, the scale of the fracturing crack is effectively controlled, and the spraying of the spraying liquid can be accurately controlled in the aim of improving the fracturing effect; can greatly reduced construction cycle in actual operation, improve the construction precision, the simple operation reduces manual work and equipment cost.
Example 3:
a fracturing method, using the fracturing device of embodiment 3 to complete the operation, comprising the steps of:
step 1, determining a hydraulic fracturing layer and a fracturing influence scale according to the type of a treatment problem, and determining a jet channel to be opened to carry out directional drilling construction according to the fracturing influence range to form a fracturing drilled hole;
in the mining process of a certain mining working face a, the coal seam is buried deeply, and a hard rock stratum with the thickness of h exists on the top plate of the coal seam, so that the hard rock stratum is difficult to fall along with mining, and stress concentration is easy to cause. After the stoping of the working face b is finished, the hard top plate forms a certain suspended roof in the lateral direction of a stoping roadway coal pillar of the working face a, so that the roadway i of the working face a is seriously deformed, the maintenance cost is high, and the safety production continuation is seriously influenced.
And calculating the rock breaking angle through the parameters such as the internal friction coefficient and the internal friction angle of the rock.
Using a theoretical calculation formula:
wherein alpha is a rock breaking angle,
referred to as the internal friction angle of the rock. Wherein
μ is the internal friction coefficient.
According to the parameters of the ground stress parameter of the research area, the coal seam burial depth H, the coal rock layer physical and mechanical parameters (including volume weight, thickness, burial depth, internal friction angle, cohesion, volume modulus), the working face length and the like, the FLAC is utilized 3d Simulation software is used for establishing a molar coulomb model and carrying out hydraulic fracture numerical simulation analysis to obtain hydraulic fracture parameters under the working condition, wherein the parameters compriseWater injection amount, fracturing time, etc. Simulating to obtain that the main crack grows in the horizontal direction to form an ellipsoid influence range and the major axis radius x of the ellipsoid in the hydraulic fracturing process of the hard roof 1 Minor axis radius x 2 。
In order to ensure that the lateral suspension top can be effectively collapsed, an artificial fracture line needs to be prefabricated, and the position of the artificial fracture line is the i-shaped coal pillar side of the roadway.
The opening of the ejector is m in sequence 1 、m 2 ……m n . Determining a channel (a channel with an included angle with a vertical line closest to the breaking angle of the top plate) m to be opened by directional spraying by combining the breaking angle alpha of the hard top plate x 。
Determining fracturing drilling parameters: including the length L of the drilled hole and the distance L between the horizontal position and the coal pillar 1 And the distance L between the vertical position and the coal seam roof 2 . The fracturing drill holes are arranged in the middle of the hard top plate in the vertical direction, the fracturing drill holes are arranged in the middle of the hard rock layer according to the parameters of the fracture angle alpha of the hard top plate, the thickness h of the hard rock layer and the like, and the positions of the fracturing drill holes are determined by combining the calculation of a trigonometric function. And determining the length L of the fracturing drill hole according to the treatment range.
Step 2, spacing s =2x between adjacent fracturing stages 2 . And designing a first fracturing section as a drilling hole bottom, and accurately delivering the first fracturing section to a first fracturing position through a guide shoe.
Step 3, selecting a corresponding plugging ball according to the requirement during operation, pushing the corresponding plugging ball to reach the inside of a sliding sleeve matched with the corresponding plugging ball under the action of fracturing fluid and jet fluid, moving the sliding sleeve at the position downstream to enable a nozzle to be communicated with the first through hole, and opening the nozzle to release the jet fluid;
and 4, stopping supply of the fracturing fluid and the injection fluid after injection is finished, recovering the free state of the first elastic part to rebound the high-density ball, recovering the high-density ball, dragging the equipment to the next injection fracturing section after the first-stage construction is finished, starting the next fracturing construction, and sequentially circulating until the design fracturing is finished.
Comparative example:
the fracturing fluid adopts the existing non-directional injection mode under the same pressure as that of the embodiment 3, and as shown in fig. 11, the expansion range and the extension direction of the fractured crack are uncontrollable, so that the weakening effect is not ideal. Especially under the working condition that directional fracturing is needed, the fracturing effect is difficult to control.
Claims (9)
1. A single-channel multistage direction control ejector comprises a pipe body (100) and a plurality of nozzles (110), wherein the pipe body (100) is provided with a first through hole along the axial direction of the pipe body, each nozzle (110) is arranged on the side wall of the pipe body (100) along the axial direction of the pipe body (100), and the nozzles (110) are communicated with the first through hole, and the single-channel multistage direction control ejector is characterized by further comprising a plurality of sliding sleeves (200), a first elastic piece (400), a first clamping table (700) and a plurality of blocking balls (300);
each sliding sleeve (200) is adjacently abutted and arranged in the first through hole, the outer wall of each sliding sleeve (200) is contacted with the inner wall of the pipe body (100), the inner diameter of each sliding sleeve (200) is gradually reduced along the axial direction of the pipe body (100), and each nozzle (110) is arranged on the side wall of the pipe body (100) at equal intervals and is respectively positioned at the position of each sliding sleeve (200) corresponding to the pipe body (100);
the first clamping table (700) is arranged at one end of the pipe body (100) with the reduced inner diameter of the sliding sleeve, the first elastic piece (400) is arranged in the pipe body (100), one end of the first elastic piece is in abutting connection with the sliding sleeve (200), the other end of the first elastic piece is connected with the first clamping table (700), and the maximum elastic deformation of the first elastic piece (400) is greater than the axial length of the sliding sleeve and is smaller than the axial length between the two nozzles;
the number of the blocking balls (300) is in one-to-one correspondence with the sliding sleeves (200), and each blocking ball (300) can be correspondingly clamped in the sliding sleeve.
2. The single-channel, multi-stage, steering injector of claim 1, further comprising:
the second mount table (600), the one end that first calorie of platform (700) was kept away from in body (100) is located in second mount table (600), and second mount table (600) set up the second through-hole along its axial, and second mount table (600) are contradicted with sliding sleeve (200) and are connected.
3. The single-passage multistage directional-control injector of claim 2, characterized in that the sliding sleeves (200) arranged adjacently are connected with each other through a second elastic member (500).
4. The single-channel multistage directional control injector according to claim 2, characterized in that a plurality of nozzles are arranged on the side wall of the pipe body (100) corresponding to each sliding sleeve (200) along the circumferential direction.
5. The single-channel multistage directional control injector according to claim 2, characterized in that each sliding sleeve (200) is arranged in a non-rotatable manner with respect to the pipe body (100).
6. The single-channel multi-stage direction control injector according to claim 5, characterized in that a sliding groove is arranged on the pipe body (100), and a protrusion is arranged at a position corresponding to the sliding sleeve (200), and the protrusion is matched with the sliding groove.
7. The single-channel multi-stage direction control injector according to claim 2, wherein the central axes of the pipe body (100), the sliding sleeve (200), the first elastic member (400), the first clamping table (700) and the second mounting table (600) are arranged in a collinear manner.
8. A fracturing device comprising the single-channel multistage steering injector of any one of claims 1 to 7, and further comprising a packer (1000), a constant pressure interceptor (1200), a fracturing string (1100) and a guide shoe (900) which are connected in sequence; the single-channel multistage direction-control ejector (800) is respectively connected with the packer (1000) and the constant-pressure interceptor (1200).
9. A method of fracturing, wherein the method is carried out by means of a fracturing apparatus as claimed in claim 7;
the method specifically comprises the following steps:
step 1, determining a hydraulic fracturing layer and a fracturing influence scale according to the type of a treatment problem, and determining a jet channel to be opened to carry out directional drilling construction according to the fracturing influence range to form a fracturing drilled hole;
step 2, the fracturing device is sent to a fracturing drilling hole design position, and the fracturing device is accurately sent to the design position through a guide shoe;
step 3, selecting a corresponding plugging ball according to needs, pushing the plugging ball to reach the inside of a sliding sleeve matched with the plugging ball under the action of fracturing fluid and jet fluid, moving the sliding sleeve at the position downstream to enable a nozzle to be communicated with the first through hole, and opening the nozzle to release the jet fluid;
and 4, stopping the supply of the fracturing fluid and the injection fluid after the injection is finished, recovering the free state of the first elastic part to rebound the high-density ball, recovering the high-density ball, dragging the equipment to the next injection fracturing stage position after the first-stage construction is finished, starting the next fracturing construction stage, and sequentially circulating until the design fracturing is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490462.7A CN115749692A (en) | 2022-11-25 | 2022-11-25 | Single-channel multistage direction-control ejector, fracturing device and fracturing method |
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| CN202211490462.7A CN115749692A (en) | 2022-11-25 | 2022-11-25 | Single-channel multistage direction-control ejector, fracturing device and fracturing method |
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| CN117684941A (en) * | 2024-02-02 | 2024-03-12 | 新疆石油管理局有限公司 | Double-seal repeated transformation device and method for horizontal well with pressurized combined tubular column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117684941A (en) * | 2024-02-02 | 2024-03-12 | 新疆石油管理局有限公司 | Double-seal repeated transformation device and method for horizontal well with pressurized combined tubular column |
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