CN219840612U - Hydraulic fracturing orifice device - Google Patents
Hydraulic fracturing orifice device Download PDFInfo
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- CN219840612U CN219840612U CN202321170279.9U CN202321170279U CN219840612U CN 219840612 U CN219840612 U CN 219840612U CN 202321170279 U CN202321170279 U CN 202321170279U CN 219840612 U CN219840612 U CN 219840612U
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- hydraulic fracturing
- pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 230000001965 increasing effect Effects 0.000 claims description 7
- 210000000664 rectum Anatomy 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 10
- 238000000605 extraction Methods 0.000 description 6
- 230000035699 permeability Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The utility model relates to a hydraulic fracturing orifice device, and belongs to the field of underground hydraulic fracturing of coal mines. The device comprises a first path, a second path and a third path which are sequentially communicated according to the direction of water injection flow; the axes of the first path, the second path and the third path are collinear; the first diameter is connected with a fracturing water pump through a high-pressure rubber pipe, and the third diameter is connected with a sieve tube through a sealing fracturing tubular column penetrating through a hole sealing section; the caliber of the second diameter is larger than that of the first diameter; the water outlet of the second diameter is fixedly connected with an annular spring base, a powerful spring facing the water inlet of the second diameter is fixed on the annular spring base, and the free end of the powerful spring is fixedly connected with a blocking steel ball; the diameter of the plugging steel ball is between the caliber of the first diameter and the caliber of the second diameter; the second diameter still is equipped with the pressure release pipeline, and the pressure release pipeline passes through solenoid valve and outside intercommunication. The hydraulic fracturing orifice pressure maintaining device has the advantages that the service life of the hydraulic fracturing orifice pressure maintaining device is prolonged, the cost is reduced, the maintenance workload is reduced, and the fracturing efficiency is improved.
Description
Technical Field
The utility model belongs to the field of underground hydraulic fracturing of coal mines, and relates to a hydraulic fracturing orifice device.
Background
In the exploitation of coal bed gas, the coal bed permeability of the coal bed is low, the extraction radius is small, the extraction difficulty is high, the gas extraction concentration, the extraction rate and the extraction efficiency are low, and the improvement of the coal bed permeability becomes a technical problem to be solved in the high-efficiency extraction of the coal bed gas at present.
Hydraulic fracturing is a main method for hydraulically increasing permeability, and has the advantages of large permeability increasing range, good permeability increasing effect and the like. The principle is that a ground high-pressure pump is utilized to squeeze fracturing fluid into a reservoir through a shaft, and when the speed of the fracturing fluid injection exceeds the absorption capacity of the reservoir, high pressure is formed; when the pressure exceeds the fracture pressure of the coal rock near the bottom of the well, the coal rock is pressed open and cracks are generated, the fracturing fluid is continuously squeezed and injected, and the cracks are continuously expanded into the reservoir; then, sand-carrying fluid with propping agent needs to be squeezed in, and after the sand-carrying fluid enters the cracks, the cracks can be extended forwards continuously, and the cracks which are already pressed open can be supported so as not to be closed; and then injecting displacement fluid, displacing all sand-carrying fluid of the well bore into the cracks, and supporting the cracks by using propping agents so as to establish a new fluid channel between the reservoir and the well bore.
In the fracturing process, the prior art generally adopts a one-way valve to carry out pressure maintaining and pressure relief, and has the advantages of small fluid resistance, small moment required by opening and closing and the like. However, because the pressure of the orifice of the fracturing process is continuously increased, the water pressure of the one-way valve is larger when pressure maintaining is needed, at the moment, the closing of the one-way valve can generate water hammer pressure in a pipeline, damage to the valve is easy to cause, the service life of the valve is short, frequent maintenance or replacement is needed, and labor and time cost are increased.
Disclosure of Invention
In view of the above, the present utility model aims to provide a hydraulic fracturing orifice device, which can prolong the service life of the hydraulic fracturing orifice pressure maintaining device, reduce the cost, reduce the maintenance workload and improve the fracturing efficiency.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a hydraulic fracturing orifice device, wherein the orifice device is arranged outside a hole sealing section of a fracturing drilling hole; the device comprises a first path, a second path and a third path which are sequentially communicated according to the direction of water injection flow; the axes of the first path, the second path and the third path are collinear; the first diameter is connected with a fracturing water pump through a high-pressure rubber pipe, and the third diameter is connected with a sieve tube through a sealing fracturing tubular column and the hole sealing section; the caliber of the second diameter is larger than that of the first diameter; the water outlet of the second diameter is fixedly connected with an annular spring base, a powerful spring with a free end facing the water inlet of the second diameter is fixedly connected to the annular spring base, and the free end of the powerful spring is fixedly connected with a blocking object; the length of the strong spring is equal to the length of the second diameter when the strong spring is not stressed; the diameter of the plugging material is between the caliber of the first diameter and the caliber of the second diameter; the second diameter is also provided with a pressure relief pipeline, and the pressure relief pipeline is communicated with the outside through an electromagnetic valve.
Further, the blocking object is a blocking steel ball. According to the scheme, the plugging material can move more smoothly in the second path, the contact area of the small ball, compared with other structures, of the sealing part of the second path is smaller, larger space high-pressure water flow can be generated when the small ball moves, the water flow is larger when the high-pressure water flow impacts, the pressure required to keep fracturing is reached more quickly, and the fracturing efficiency is improved.
Further, the junction of first latus rectum and second latus rectum is the transition cambered surface. Compared with a structure with a corner, the sealing ball is clamped and fixed at the second through-hole water inlet more firmly, and a notch is prevented from being formed due to abrasion caused by collision of the sealing ball and the corner, so that the sealing ball is longer in service life, and the sealing effect during pressure maintaining is avoided.
Further, the caliber of the third path is larger than that of the second path. The scheme increases the water flow entering the sealed fracturing string, thereby improving the fracturing efficiency,
further, the third diameter gradually increases from the water inlet to the water outlet. According to the scheme, the water pressure change caused by overlarge caliber change of the second diameter and the third diameter can be prevented, and the water pressure stability of water flowing into the third diameter is improved.
Further, the length of the strong spring is longer than the length of the second diameter when the strong spring is not stressed. Because the second diameter is also provided with the plugging small ball and the annular spring base, the powerful spring is in a slight compression state at the beginning, and before fracturing, the plugging small ball is propped and fixed at the water inlet of the second diameter by the elastic force of the elastic spring to restore deformation.
Further, the second path is also provided with a pressure flow sensor. The flow of the pressure of second latus rectum can be detected to this scheme, and the help judges whether to reach the pressure that needs the pressurize.
Further, the orifice device is provided with a DN connector at the water inlet of the first drift diameter, and is fixedly connected with the high-pressure rubber tube through the DN connector.
Further, a sealing pipe column thread fastener is arranged at the port of the third path, and the third path is fixedly connected with a sealing fracturing pipe column through the sealing pipe column thread fastener.
The utility model has the beneficial effects that:
according to the scheme, the pressure relief pipeline is used for pressure relief, the pressure maintaining and pressure relief functions of the one-way valve are shared to the two structures, when high-pressure water is injected and pressure maintaining is carried out, the pressure of the generated water hammer is smaller, if the plugging steel ball is used as a plugging object, as the ball is of a spherical structure, water flow is in a smooth streamline form in gaps at two sides of the ball, the pressure of the generated water hammer is smaller, the influence on the inner wall of the orifice device is far smaller than that of the one-way valve, and damage caused by overlarge force on the device is avoided; and when the pressure is released, as the electromagnetic valve is initially in a closed state, the pressure release is easier when the electromagnetic valve is opened under higher water pressure than when the electromagnetic valve is closed under higher water pressure, and the damage to the valve is smaller, so that the electromagnetic valve is safer and more durable than the one-way valve.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic illustration of the operation of a hydraulic fracturing port apparatus of the present utility model;
FIG. 2 is a schematic diagram of the state of the orifice device at the time of fracturing;
FIG. 3 is a schematic diagram of the orifice device during dwell time;
fig. 4 is a schematic view of an annular spring base.
Reference numerals: the fracturing coal seam 1, the fracturing drilling 2, the sieve tube 3, the sealing fracturing string 4, the hole sealing section 5, the orifice device sealing string thread fastener 6, the pressure flow sensor 7, the strong spring 8, the plugging steel ball 9, the annular spring base 10, the electromagnetic valve 11, the orifice device DN connector 12, the high-pressure rubber tube 13, the fracturing pump 14 and the water tank 15.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-3, a hydraulic fracturing orifice device is provided outside a hole sealing section 5 of a fracturing drill hole 2; the orifice device comprises a first path, a second path and a third path which are sequentially communicated according to the direction of water injection flow; the axes of the first path, the second path and the third path are collinear; the orifice device is provided with a DN connector 12 at a water inlet of a first drift diameter, the DN connector 12 is connected with a high-pressure rubber tube 13, the high-pressure rubber tube 13 is communicated with a fracturing pump 14, the fracturing pump 14 is communicated with a water tank 15, the third drift diameter is provided with an orifice device sealing string thread fastener 6 which is fixedly connected with a sealing fracturing string 4, and the third drift diameter is connected with a sieve tube 3 through the sealing fracturing string 4 passing through the hole sealing section 5; the caliber of the third path is larger than that of the second path, the caliber of the second path is larger than that of the first path, and the caliber from the water inlet of the third path to the water outlet of the third path is gradually increased; the water outlet of the second diameter is fixedly connected with an annular spring base 10, a powerful spring 8 facing the water inlet of the second diameter is fixed on the annular spring base 10, and the free end of the powerful spring 8 is fixedly connected with a blocking steel ball 9; the diameter of the plugging steel ball 9 is between the caliber of the first diameter and the caliber of the second diameter.
The second diameter is also provided with a pressure relief pipeline, the pressure relief pipeline is communicated with the outside through the electromagnetic valve 11, the electromagnetic valve 11 can be connected with a controller through a signal transmission line to control the switch of the electromagnetic valve 11, the electromagnetic valve 11 is in a closed state initially, and the pressure relief pipeline can directly adopt the existing control circuit. The second path is further provided with a pressure flow sensor 7, the pressure flow sensor 7 is connected with the controller, the monitored pressure signal is sent to the controller, a judging condition can be set in the controller, when the condition threshold of the controller is reached, for example, when the collected pressure signal is larger than the pressure required for pressure maintaining, timing is started, and if the timing reaches the preset pressure maintaining time threshold, the electromagnetic valve 11 is automatically controlled to be opened for pressure relief.
In this embodiment, the length of the strong spring 8 when not stressed is equal to the length of the second path, and since the second path further includes the plugging ball 9 and the annular spring base 10, both of which occupy a certain space, the strong spring 8 is in a slightly compressed state initially, and before fracturing, the plugging ball 9 is held against the water inlet of the second path by the elastic force of the strong spring 8 for restoring deformation, so as to avoid leakage of coalbed methane through the orifice device when the orifice device is installed.
The principle of the scheme is as follows:
during fracturing, high-pressure water pushes the blocking steel ball 9 to compress the strong spring 8, the high-pressure water passes through a gap between the blocking steel ball 9 and the second path, so that the high-pressure water enters the third path, enters the fracturing drilling hole 2 through the sealing fracturing string 4 and the sieve tube 3, and starts to fracture in the fracturing coal seam 1. When the pressure condition required by fracturing is reached, the fracturing pump 14 does not provide high-pressure water flow any more, the pressure on the first diameter side returns to normal, the water pressure inside the fracturing pipe is larger than the water pressure on the first diameter side, the high-pressure water is reversely extruded to push the plugging steel ball 9 to move to the first diameter side, the plugging steel ball 9 is propped against the joint of the first diameter and the second diameter by larger pressure, the outflow of fracturing fluid is prevented, and the automatic pressure maintaining function is realized. When the pressure maintaining time is over and the pressure maintaining is not needed, the electromagnetic valve 11 is opened, so that the high-pressure water with the second diameter is discharged from the pressure release pipeline, the pressure in the pressure cracking pipe is recovered to be normal, and the purpose of pressure release is achieved.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (9)
1. A hydraulic fracturing orifice device, wherein the orifice device is arranged outside a hole sealing section of a fracturing drilling hole; the method is characterized in that: the device comprises a first path, a second path and a third path which are sequentially communicated according to the direction of water injection flow; the axes of the first path, the second path and the third path are collinear; the first diameter is connected with a fracturing water pump through a high-pressure rubber pipe, and the third diameter is connected with a sieve tube through a sealing fracturing tubular column and the hole sealing section; the caliber of the second diameter is larger than that of the first diameter; the water outlet of the second diameter is fixedly connected with an annular spring base, a powerful spring with a free end facing the water inlet of the second diameter is fixedly connected to the annular spring base, and the free end of the powerful spring is fixedly connected with a blocking object; the length of the strong spring is equal to the length of the second diameter when the strong spring is not stressed; the diameter of the plugging material is between the caliber of the first diameter and the caliber of the second diameter; the second diameter is also provided with a pressure relief pipeline, and the pressure relief pipeline is communicated with the outside through an electromagnetic valve.
2. A hydraulic fracturing port device according to claim 1, wherein: the blocking object is a blocking steel ball.
3. A hydraulic fracturing port device according to claim 2, wherein: the junction of first latus rectum and second latus rectum is the transition cambered surface.
4. A hydraulic fracturing port device according to claim 1, wherein: and the caliber of the third path is larger than that of the second path.
5. A hydraulic fracturing port apparatus according to claim 4, wherein: and the caliber of the third path from the water inlet to the water outlet is gradually increased.
6. A hydraulic fracturing port device according to claim 3, characterized in that: the length of the strong spring is longer than that of the second diameter when the strong spring is not stressed.
7. A hydraulic fracturing port device according to claim 1, wherein: and the second path is also provided with a pressure flow sensor.
8. A hydraulic fracturing port device according to claim 1, wherein: the orifice device is provided with a DN connector at the water inlet of the first drift diameter, and is fixedly connected with the high-pressure rubber tube through the DN connector.
9. A hydraulic fracturing port device according to claim 1, wherein: the port of the third path is provided with a sealing pipe column thread fastener, and the third path is fixedly connected with a sealing fracturing pipe column through the sealing pipe column thread fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321170279.9U CN219840612U (en) | 2023-05-15 | 2023-05-15 | Hydraulic fracturing orifice device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321170279.9U CN219840612U (en) | 2023-05-15 | 2023-05-15 | Hydraulic fracturing orifice device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219840612U true CN219840612U (en) | 2023-10-17 |
Family
ID=88301689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321170279.9U Active CN219840612U (en) | 2023-05-15 | 2023-05-15 | Hydraulic fracturing orifice device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219840612U (en) |
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2023
- 2023-05-15 CN CN202321170279.9U patent/CN219840612U/en active Active
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