CN113622887B - Fracturing and intelligent water control integrated device - Google Patents
Fracturing and intelligent water control integrated device Download PDFInfo
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- CN113622887B CN113622887B CN202010371465.3A CN202010371465A CN113622887B CN 113622887 B CN113622887 B CN 113622887B CN 202010371465 A CN202010371465 A CN 202010371465A CN 113622887 B CN113622887 B CN 113622887B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 97
- 238000007667 floating Methods 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/32—Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells
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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)
- Multiple-Way Valves (AREA)
Abstract
The invention provides a fracturing and intelligent water control integrated device, which belongs to the technical field of petroleum completion and production, and comprises a cylindrical sliding sleeve outer barrel, wherein a fracturing hole and an intelligent water control valve are arranged on the outer wall of the sliding sleeve outer barrel; the switch inner cylinder is arranged in the sliding sleeve outer cylinder, and is used for blocking the fracturing hole and the intelligent water control valve in an initial state; when in fracturing operation, the switch inner cylinder seals the intelligent water control valve and opens the fracturing hole; when oil and water are stabilized, the switch inner cylinder seals the fracturing hole and opens the intelligent water control valve. The fracturing control system can integrate fracturing and intelligent water control functions, can complete fracturing operation by one pipe column, simultaneously realize the intelligent water control function of the production pipe column, does not need additional pipe column running, and can greatly save pipe column operation cost and tool cost.
Description
Technical Field
The invention relates to a fracturing and intelligent water control integrated device, and belongs to the technical field of petroleum well completion and production.
Background
In the oil and gas exploitation process, the fracturing operation is a very effective yield increasing method, and particularly, the layering transformation technology has become an important means for increasing yield of low-permeability oil and gas reservoirs. The sliding sleeve type staged fracturing technology is an important means for exploiting the unconventional oil and gas resources, and is widely applied to the fracturing yield improvement of vertical wells, horizontal wells and directional wells of low-permeability producing layers and thin oil layers.
The ball-throwing sliding sleeve type fracturing tool can be put into the well bottom by one trip of pipe column without lifting the pipe column again and is used as a production pipe column. But the pipe column does not have an intelligent water control function, and particularly most of oil fields are wholly in an ultra-high water-containing period at present, and the situation of oil stabilization and water control is very severe. The later water control difficulty of the horizontal well is high, and the production profile of the long horizontal well is difficult to continuously and uniformly advance due to the influence of the heel toe effect, the reservoir heterogeneity, the reservoir anisotropy, the natural cracks and other factors, so that water/gas can be prematurely penetrated at the heel end of an oil well, a hypertonic layer section and the cracks to form a rapid channel, oil production at other positions is inhibited, serious heel end effect and unbalanced liquid supply phenomenon are easily generated, the horizontal well section has an inefficient section, the effective full utilization can not be realized, and the recovery ratio of the oil field is influenced.
Existing inflow control devices, which are generally fixed in flow path, delay water/gas outflow but, due to their constant Flow Resistance Rating (FRR), once water/gas coning occurs, water/gas of low viscosity will occupy the entire wellbore and inhibit the flow of the oil phase, resulting in a significant drop in well production. In addition, the fracturing operation and the water control oil extraction operation in the current production are generally completed through two pipe columns, and are realized through two tools, so that the complexity of the work is increased.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a fracturing and intelligent water control integrated device which can integrate fracturing and intelligent water control functions into a whole, can finish fracturing operation by one pipe column, simultaneously realize the intelligent water control function of a production pipe column, does not need additional pipe column to be put in, and can greatly save pipe column operation cost and tool cost.
The invention provides a fracturing and intelligent water control integrated device, which comprises:
the outer wall of the cylindrical sliding sleeve outer cylinder is provided with a fracturing hole and the intelligent water control valve; and
the switch inner cylinder is arranged in the sliding sleeve outer cylinder, and is used for blocking the fracturing hole and the intelligent water control valve in an initial state; when in fracturing operation, the switch inner cylinder seals the intelligent water control valve and opens the fracturing hole; when oil and water are stabilized, the switch inner cylinder seals the fracturing hole and opens the intelligent water control valve.
The invention is further improved in that the side wall of the switch inner cylinder is provided with a clamp spring; a plurality of snap spring positioning grooves are formed in the inner wall of the sliding sleeve outer cylinder; the clamp spring is selectively clamped in the clamp spring positioning groove.
The invention is further improved in that the clamp spring positioning groove comprises a first clamp spring positioning groove, a second clamp spring positioning groove and a third clamp spring positioning groove;
the switch inner barrel is arranged at a first position, and is connected with the first clamp spring positioning groove in a clamping mode; during fracturing operation, the clamp spring is clamped in the second clamp spring positioning groove, and the switch inner barrel is positioned at a second position; when oil and water are stabilized, the clamp spring is clamped in the third clamp spring positioning groove, and the switch inner barrel is positioned at a third position.
The invention is further improved in that the fracturing hole is arranged above the intelligent water control valve; the first clamp spring positioning groove is arranged in the middle of the sliding sleeve outer barrel, the second clamp spring positioning groove is arranged below the first clamp spring positioning groove, and the third clamp spring positioning groove is arranged above the first clamp spring positioning groove;
the intelligent water control valve is characterized in that the fracturing hole and the intelligent water control valve are blocked when the switch inner barrel is positioned at a first position, the intelligent water control valve is blocked when the switch inner barrel is positioned at a second position, the intelligent water control valve is positioned below the fracturing hole, the fracturing hole is blocked when the switch inner barrel is positioned at a third position, and the intelligent water control valve is positioned above the intelligent water control valve.
The invention is further improved in that a soluble ball seat is arranged in the switch inner cylinder, and after a pressure-holding ball is put into the switch inner cylinder, the pressure-holding ball is clamped on the soluble ball seat; the pressure above the pressure-holding ball is increased so as to push the switch inner cylinder to move from the first position to the second position.
The invention is further improved in that in the initial state, the switch inner cylinder is connected with the sliding sleeve outer cylinder through a shear pin.
The invention further improves that the main bodies of the soluble ball seat and the pressure holding ball are made of materials which can be dissolved in the liquid in the switch inner cylinder; the surfaces of the soluble ball seat and the pressure-holding ball are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure.
A further development of the invention provides that the switching drum is moved from the second position to the third position by a switching tool.
The invention is further improved in that an upper joint is arranged at the upper end of the sliding sleeve outer cylinder.
The invention further improves that the intelligent water control valve comprises:
the cylindrical shell is provided with a cavity in the middle, a fluid inlet is formed in one side face of the shell, and a fluid outlet is formed in the other side face of the shell;
a free-floating disc disposed within the cavity, the free-floating disc adjusting a distance from the fluid inlet according to a velocity and viscosity of the fluid;
when the fluid with high speed and low viscosity flows in, the distance between the free floating disc and the fluid inlet is reduced, and the inflow of the fluid is restrained; when fluid with small speed and high viscosity flows in, the distance between the free floating disc and the fluid inlet is increased, and the fluid is promoted to flow in.
The invention further improves that the shell comprises a first valve body and a second valve body which are oppositely arranged, wherein the first valve body comprises a first plate surface and a first side edge; the second valve body comprises a second plate surface and a second side edge;
the fluid inlet is arranged on the first plate surface, and the fluid outlet is arranged on the second plate surface.
The invention further improves that the second plate surface is provided with a supporting piece, and the supporting piece supports the free floating disc, so that a certain distance is reserved between the free floating disc and the second plate surface.
A further development of the invention is that the fluid inlet is arranged in the centre of the first plate surface and the fluid outlet is arranged in the outer ring of the support member on the second plate surface.
A further development of the invention consists in that the inner side of the first side is in sleeve connection with the outer side of the second side, and in that a sealing element is arranged on the inner side of the first side for sealing the first side and the second side.
Compared with the prior art, the invention has the advantages that:
the fracturing and intelligent water control integrated device can integrate fracturing and intelligent water control functions, can complete fracturing operation by one pipe column, simultaneously realize the intelligent water control function of a production pipe column, does not need additional pipe column to be put in, and can greatly save pipe column operation cost and tool cost.
According to the fracturing and intelligent water control integrated device, the intelligent water control valve can automatically adjust the size of the flow passage according to different fluid properties, has the characteristics of intelligent water control and oil increasing, can effectively solve the problem of high water content of an oil well, and improves the oil reservoir recovery ratio. When fluid with high speed and low viscosity flows in, the distance between the free floating disc and the fluid inlet is reduced, and the inflow of the fluid is restrained; when fluid with small speed and high viscosity flows in, the distance between the free floating disc and the fluid inlet is increased, and the fluid is promoted to flow in.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of a fracturing and intelligent water control integrated device according to an embodiment of the present invention, showing the structure in an initial state;
FIG. 2 is a schematic diagram of a fracturing and intelligent water control integrated device according to an embodiment of the present invention, showing the structure during fracturing operation;
fig. 3 is a schematic structural diagram of a fracturing and intelligent water control integrated device according to an embodiment of the present invention, showing a structure of a fracturing ball after fracturing operation and a dissolved ball seat;
FIG. 4 is a schematic structural diagram of a fracturing and intelligent water control integrated device according to an embodiment of the present invention, showing the structure during oil stabilization and water control;
FIG. 5 is a schematic view of an intelligent water control valve according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of a first valve body according to an embodiment of the present invention;
fig. 7 is a schematic diagram showing the structure of a second valve body according to an embodiment of the present invention.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
The meaning of the reference numerals in the drawings is as follows: 1. the hydraulic control device comprises a sliding sleeve outer cylinder, 2, a switch inner cylinder, 3, an intelligent water control valve, 4, a pressure-holding ball, 11, a fracturing hole, 12, a first clamp spring positioning groove, 13, a second clamp spring positioning groove, 14, a third clamp spring positioning groove, 15, a shear pin, 16, an upper joint, 21, a clamp spring, 22, a soluble ball seat, 31, a first valve body, 311, a first plate surface, 312, a first side edge, 313, a fluid inlet, 314, a sealing ring, 32, a second valve body, 321, a second plate surface, 322, a second side edge, 323, a fluid outlet, 324, a supporting piece, 33 and a free floating disc.
Detailed Description
In order to make the technical solution and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some of the embodiments of the present invention and are not exhaustive of all embodiments. And embodiments of the invention and features of the embodiments may be combined with each other without conflict.
According to the fracturing and intelligent water control integrated device provided by the embodiment of the invention, the fracturing and intelligent water control functions can be integrated, the fracturing operation can be completed by one pipe column, meanwhile, the intelligent water control function of the production pipe column is realized, no additional pipe column is needed to be put in, and the pipe column operation cost and the tool cost can be greatly saved.
As shown in fig. 1, the fracturing and intelligent water control integrated device in this embodiment includes a sliding sleeve outer cylinder 1. The sliding sleeve outer cylinder 1 is of a cylindrical structure. The sliding sleeve outer cylinder 1 is provided with a fracturing hole 11 and an intelligent water control valve 3. The fracturing holes 11 are arranged on the side wall of the sliding sleeve outer cylinder 1 in the radial direction, and a plurality of fracturing holes 11 are arranged for one circle and used for fracturing operation. The intelligent water control valve 3 is arranged on the side wall of the sliding sleeve outer barrel 1, one end of a fluid inlet of the intelligent water control valve 3 faces the inner side of the sliding sleeve outer barrel 1, and one end of a fluid outlet faces the outer side of the sliding sleeve outer barrel 1.
When the fracturing and intelligent water control integrated device according to the embodiment is used, the switch inner cylinder 2 is in an initial state and the whole sliding sleeve outer cylinder 1 is in a through state when entering a well as shown in fig. 1; during fracturing operation, as shown in fig. 2, the intelligent water control valve 3 is plugged by the movable switch inner cylinder 2, and the fracturing hole 11 is opened; when oil and water are stabilized, as shown in fig. 4, the switch inner cylinder 2 seals the fracturing hole 11 and opens the intelligent water control valve 3.
The fracturing operation can be realized through the fracturing and intelligent water control integrated device, and the oil stabilization and water control can also be realized.
In one embodiment, as shown in fig. 1, a clamping spring 21 is disposed on a side wall of the switch inner cylinder 2, and the clamping spring 21 is disposed outside the switch inner cylinder 2. The inner wall of the sliding sleeve outer barrel 1 is provided with a plurality of jump ring positioning grooves, and the jump ring 21 is selectively clamped in the jump ring positioning grooves. The selective clamping means that one of the positioning clamping grooves is selected for clamping under different conditions. For example, the snap spring positioning grooves of the snap spring are different in the initial state, the fracturing operation state and the oil-stable water-controlling state.
In a preferred embodiment, the number of snap spring positioning grooves is three, namely a first snap spring positioning groove 12, a second snap spring positioning groove 13 and a third snap spring positioning groove 14. In the initial state, the clamp spring 21 of the switch inner cylinder 2 is clamped in the first clamp spring positioning groove 12, and the switch inner cylinder 2 is positioned at a first position; during fracturing operation, the clamp spring 21 is clamped in the second clamp spring positioning groove 13, and the switch inner cylinder 2 is positioned at a second position; when oil and water are stabilized, the clamp spring 21 is clamped in the third clamp spring positioning groove 14, and the switch inner cylinder 2 is positioned at a third position.
In one embodiment, as shown in fig. 1, the fracturing hole 11 is arranged above the intelligent water control valve 3 with a certain distance therebetween. The first jump ring constant head tank 12 sets up in the middle part of sliding sleeve urceolus 1, and the second jump ring constant head tank 13 sets up the below in first jump ring constant head tank 12, and the third jump ring constant head tank 14 sets up the top in first jump ring constant head tank 12. When in the first position, the clamp spring 21 is clamped in the first clamp spring positioning groove 12, and the switch inner cylinder 2 is positioned in the middle; when in the second position, the clamp spring 21 is clamped in the second clamp spring positioning groove 13, and the switch inner cylinder 2 is positioned at the lower part; in the third position, the clamp spring 21 is clamped in the third clamp spring positioning groove 14, and the switch inner cylinder 2 is positioned at the upper position. Wherein "above" refers to the direction toward the wellhead, which is the left side in the figure; "below" is the direction away from the wellhead, which is the right direction in the figure.
In the integrated device for fracturing and intelligent water control according to this embodiment, the switch inner cylinder 2 is located at a first position to block the fracturing hole 11 and the intelligent water control valve 3, is located at a second position to block the intelligent water control valve 3, is located below the fracturing hole 11, is located at a third position to block the fracturing hole 11, and is located above the intelligent water control valve 3.
In one embodiment, a soluble ball seat 22 is arranged in the switch inner cylinder 2, and the soluble ball seat 22 can be matched with the pressure-holding ball 4. After the pressure-building ball 4 is put into, the pressure-building ball 4 is clamped on the soluble ball seat 22; the pressure above the pressure holding ball 4 increases so as to push the switch inner cylinder 2 to move from the first position to the second position.
When the fracturing and intelligent water control integrated device according to the embodiment is used, when fracturing operation is needed, the pressure holding ball 4 is thrown in, and the pressure holding ball 4 is clamped on the soluble ball seat 22, so that the central flow passage of the switch inner barrel 2 is blocked. The pressure of the fluid above the pressure holding ball 4 is increased, the pressure can push the switch inner cylinder 2 to move downwards, when the switch inner cylinder moves to the second position, the fracturing holes 11 are exposed, and fracturing operation is performed through the fracturing holes 11.
In a preferred embodiment, in an initial state, as shown in fig. 1, the switch inner cylinder 2 is connected with the sliding sleeve outer cylinder 1 through a shear pin 25. The mode of connecting through the shear pins 25 prevents the switch inner cylinder 2 and the sliding sleeve outer cylinder 1 from being separated to generate relative sliding in the well entering process, and the fracturing holes 11 or the intelligent water control valve 3 are prevented from being exposed in advance. After the pressure-holding ball 4 is put into, the shear pins 25 are sheared under the action of the pressure after the pressure above the pressure-holding ball is increased to a certain value, so that the switch inner cylinder 2 and the sliding sleeve outer cylinder 1 are separated.
In one embodiment, as shown in fig. 2, the soluble ball seat 22 and the body of the pressure holding ball 4 are made of a material which is soluble in the liquid in the switch inner cylinder 2; the surfaces of the soluble ball seat 22 and the pressure-holding ball 4 are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure to realize the full diameter inside the pipe (as shown in fig. 3).
In one embodiment, the switch drum 2 is moved from the second position to the third position by a switch means. The switch tool goes into the pit from the pit and is connected with the switch inner cylinder 2, and the switch tool is lifted up to drive the switch inner cylinder 2 to move upwards, so that the clamp spring 21 of the switch inner cylinder 2 is separated from the second clamp spring positioning groove 13 and moves to the position of the third clamp spring positioning groove 14, and the switch inner cylinder 2 is switched from the second position to the third position.
In one embodiment, the upper end of the sliding sleeve outer cylinder 1 is provided with an upper joint 26. The upper joint 26 is connected with the sliding sleeve outer cylinder 1 through threads, and the upstream component is connected through the upper joint 26.
When the fracturing and intelligent water control integrated device according to the embodiment is used, the switch inner cylinder 2 is in the first position when in a well entering state, and the clamp spring 21 is clamped in the first clamp spring positioning groove 12. The switch inner barrel 2 shields the fracturing hole 11 and the intelligent water control valve 3, sealing pieces are arranged at the upper end and the lower end of the switch inner barrel 2, and the fracturing hole 11 and the intelligent water control valve 3 can be sealed. The whole device is sealed inside and outside to prevent the well bore from communicating with reservoir fluid.
When the device of the embodiment is put into the designed position, the fracturing function is started, the soluble pressure-holding ball 4 is put into, when the pressure-holding ball 4 reaches the soluble ball seat 22, the pressure-holding ball forms a seal with the cambered surface of the soluble ball seat 22, and when the pressure in the pipe rises to a shearing value larger than that of the shearing nail 25, the shearing nail 25 connecting the switch inner cylinder 2 and the sliding sleeve outer cylinder 1 is sheared. Under the continuous pushing of pressure, the clamp spring 21 is separated from the first clamp spring positioning groove 12, the switch inner cylinder 2 moves downwards under the action of pressure, and when the switch inner cylinder moves to the second position, the clamp spring 21 is clamped in the second clamp spring positioning groove 13. The fracturing hole 11 is exposed, and a first channel between the device and reservoir fluid in this embodiment is established, and after the fracturing hole 11 is completely exposed, the first channel is completely opened, so that fracturing operation can be implemented.
After the fracturing operation is completed, the pressure-holding ball 4 and the ball seat destroy the insoluble coating under the condition of holding pressure for a period of time, and the soluble material contacts with the liquid in the pipe and is completely dissolved, so that the full diameter in the pipe is realized.
Thereafter, the first passageway may be closed and the wellbore and reservoir second fluid passageway opened for well production operations. By the switch tool being put in, the switch inner cylinder 2 is lifted up, so that the clamp spring 21 is separated from the position of the second clamp spring positioning groove 13 to reach the position of the third clamp spring positioning groove 14, and meanwhile, the switch inner cylinder 2 is fixed at the position. At this time, the inner barrel 2 of the switch completely closes the fracturing hole 11, namely, the first fluid passage is closed, the intelligent water control valve 3 is opened, and a second fluid passage between the reservoir and the shaft, namely, a passage for entering the shaft by the reservoir fluid, is established, and is a one-way passage, only allowing the reservoir fluid to enter the shaft and not allowing the shaft fluid to enter the stratum.
In the embodiment shown in fig. 5, the intelligent water control valve 3 comprises a housing. The shell is of a columnar structure, the shell is of a hollow structure, and a cavity is formed in the shell. The housing is provided with a fluid inlet 313 on one side and a fluid outlet 323 on the other side. Fluid enters the housing from fluid inlet 313, passes through the chamber and exits through fluid outlet 323. In this embodiment, the intelligent water control valve 3 further includes a free floating disc 33, where the free floating disc 33 is disposed in the cavity and is not connected to the cavity, and can freely move in the cavity. The free-floating disk 33 adjusts the distance from the fluid inlet 313 based on the velocity and viscosity of the fluid. The speed and viscosity of the fluid are generally determined by the ratio of gas to liquid in the fluid, and the fluid with larger water content and smaller gas content has small speed and large viscosity; the fluid with smaller water content, larger gas content has large speed and small viscosity.
Wherein when a fluid having a high velocity and a low viscosity flows in, the distance between the free-floating disk 33 and the fluid inlet 313 is reduced, thereby suppressing the inflow of the fluid; when a fluid having a small velocity and a large viscosity flows in, the distance between the free-floating disk 33 and the fluid inlet 313 increases, thereby promoting the inflow of the fluid.
In one embodiment, the housing includes oppositely disposed first and second valve bodies 31, 32. The first valve body 31 includes a first plate 311 and a first side 312, the first plate 311 is preferably a circular structure, the first side 312 is a cylindrical structure, and the edge of the first plate 311 is connected to the first side 312. An opening is formed at an end of the first side 312 away from the first plate 311. The second valve body 32 has a structure similar to that of the first valve body 31, and the second valve body 32 includes a second plate surface 321 and a second side 322. The second plate 321 has a circular structure, and the second side 322 has a cylindrical structure, and the diameters of the second plate 321 and the second side 322 are slightly smaller than those of the first plate 311 and the first side 312. The edge of the second panel 321 is connected to the second side 322. The second side 322 has an opening formed at an end thereof remote from the second plate 321. In the present embodiment, the first valve body 31 and the second valve body 32 are disposed opposite to each other, meaning that the openings of the first valve body 31 and the second valve body 32 are opposite to each other.
In the embodiment shown in fig. 5, the first valve body 31 and the second valve body 32 are connected in a plugging manner, and the second valve body 32 is plugged into the first valve body 31. The first side 312 and the second side 322 are connected, and a certain distance is formed between the first plate 311 and the second plate 321 due to the support of the first side 312 and the second side 322, so that a cavity is formed. In this embodiment, as shown in fig. 6, the fluid inlet 313 is disposed on the first plate surface 311, and the fluid outlet 323 is disposed on the second plate surface 321.
In the intelligent water control device according to the present embodiment, the housing includes the first valve body 31 and the second valve body 32, and is convenient to assemble or disassemble in a split type manner. The first valve body 31 and the second valve body 32 may be welded or detachably connected by screw connection or the like.
In one embodiment, as shown in fig. 7, the second plate 321 is provided with a support member 324, and the support member 324 is disposed on a side of the second plate 321 facing the first valve body 31 and located in the cavity. The support 324 supports the free-floating disc 33 such that there is a certain minimum distance between the free-floating disc 33 and the second plate surface 321. The free floating disk 33 is also spaced apart from the second plate surface 321 when it is moved to abut against the second plate surface 321. The support 324 may have a plurality of separated columnar structures or may be a ring-shaped whole.
In the intelligent water control device according to the present embodiment, the support member 324 supports the free floating disc 33, so that a certain distance between the free floating disc 33 and the second plate 321 can be ensured, on one hand, the free floating disc 33 is prevented from blocking the fluid outlet 323, and on the other hand, a space between the free floating disc 33 and the second plate 321 can provide a certain lifting force for the free floating disc 33. The greater the velocity of the fluid, the greater the pressure between the free-floating disk 33 and the second plate surface 321, and the greater the lifting force, the free-floating disk 33 is moved in the direction of the first plate surface 311, so that the distance between the free-floating disk 33 and the first plate surface 311 is reduced, and the inflow of the fluid is suppressed. The smaller the velocity of the fluid, the smaller the pressure between the free-floating disk 33 and the second plate surface 321, and the smaller the lifting force, the free-floating disk 33 is moved toward the second plate surface 321, thereby increasing the distance between the free-floating disk 33 and the first plate surface 311, and promoting the inflow of the fluid.
In one embodiment, the fluid inlet 313 is disposed in the center of the first plate 311 and the fluid outlet 323 is disposed on the second plate 321 outside of the support 324. The support 324 is disposed at the center of the second plate 321, and the fluid outlet 323 is disposed near the edge of the second plate 321. The fluid outlet 323 is disposed outside the support ring, preventing the support ring from blocking fluid flow and thereby affecting fluid discharge through the fluid outlet 323.
In one embodiment, the inner side surface of the first side 312 is sleeved with the outer side surface of the second side 322, a circle of sealing groove is provided on the inner side surface of the first side 312, a circle of sealing ring 314 is provided in the sealing groove, and the sealing ring 314 seals the contact surface between the first side 312 and the second side 322.
In the fracturing and intelligent water control integrated device according to the embodiment, the intelligent water control valve 3 causes different physical properties such as viscosity, speed and density of the fluid due to different water contents of the fluid. The flow lines generated by the fluid with different physical properties passing through the intelligent water control valve 3 in the embodiment are also different.
When a fluid having a high air content and a low water content passes through, a high-speed low pressure is generated in the fluid inlet direction of the free-floating disc 33 due to a low viscosity and a high flow rate of the fluid, and a lifting force for moving the free-floating disc 33 in the fluid inlet direction is formed between the free-floating disc 33 and the second valve body 32, and moves the floating disc in the fluid inlet 313 direction. In this way, the space between the inner side surface end of the first valve body 31 and the side of the free floating disk 33 near the fluid inlet 313 is reduced, that is, the opening degree of the free floating disk 33 is reduced, resulting in a reduced flow path between the first valve body 31 and the free floating disk 33, and the flow rate of the fluid passing through the first valve body 31 and the free floating disk 33 is reduced, thereby achieving the effect of reducing or suppressing the outflow of the fluid, and reducing or preventing the fluid from passing through the flow path to the outlet.
When the fluid having a low air content and a high water content passes through, a low-speed high pressure is generated in the fluid inlet direction of the free floating disc 33 due to a high viscosity and a low flow rate of the fluid, and the fluid provides a pressure to the free floating disc 33 under the action of the high pressure, so that the free floating disc 33 moves toward the second valve body 32. In this way, the distance between the first plate surface 311 and the free floating disk 33 increases, the opening degree of the free floating disk 33 increases, the flow path between the first valve body 31 and the free floating disk 33 increases, and the flow rate of the fluid passing through the first valve body 31 and the free floating disk 33 increases, thereby increasing or promoting the outflow of the fluid.
In the fracturing and intelligent water control integrated device of this embodiment, when the intelligent water control valve 3 is applied to the block that the moisture content is high, can block most water in the stratum, improve the output of other intervals to improve the recovery ratio of whole pit shaft. When gas intrusion occurs, the free-floating disc 33 almost completely closes the flow passage between the first valve body 31 and the free-floating disc 33, inhibiting gas from entering the wellbore, due to the lower viscosity of the gas. Therefore, the intelligent water control valve 3 has the effect of actively controlling water/gas and increasing oil, and can greatly improve the oil reservoir recovery ratio.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all alterations and/or modifications that fall within the scope of the invention, and that are intended to be included within the scope of the invention.
Claims (8)
1. Fracturing and intelligent accuse water integrated device, its characterized in that includes:
the device comprises a cylindrical sliding sleeve outer cylinder (1), wherein a fracturing hole (11) and an intelligent water control valve (3) are arranged on the outer wall of the sliding sleeve outer cylinder (1); and
the switch inner cylinder (2) is arranged in the sliding sleeve outer cylinder (1), and the switch inner cylinder (2) seals the fracturing hole (11) and the intelligent water control valve (3) in an initial state; during fracturing operation, the intelligent water control valve (3) is plugged by the switch inner cylinder (2), and the fracturing hole (11) is opened; when oil stabilization and water control are carried out, the switch inner cylinder (2) seals the fracturing hole (11) and opens the intelligent water control valve (3);
a clamp spring (21) is arranged on the side wall of the switch inner cylinder (2); the inner wall of the sliding sleeve outer cylinder (1) is provided with a plurality of clamp spring positioning grooves; the clamp spring (21) is selectively clamped in the clamp spring positioning groove;
the clamping spring positioning grooves comprise a first clamping spring positioning groove (12), a second clamping spring positioning groove (13) and a third clamping spring positioning groove (14);
in an initial state, the clamp spring (21) is clamped in the first clamp spring positioning groove (12), and the switch inner cylinder (2) is positioned at a first position; during fracturing operation, the clamp spring (21) is clamped in the second clamp spring positioning groove (13), and the switch inner cylinder (2) is positioned at a second position; when oil stabilization and water control are performed, the clamp spring (21) is clamped in the third clamp spring positioning groove (14), and the switch inner cylinder (2) is positioned at a third position;
the fracturing hole (11) is arranged above the intelligent water control valve (3); the first clamp spring positioning groove (12) is formed in the middle of the sliding sleeve outer cylinder (1), the second clamp spring positioning groove (13) is formed below the first clamp spring positioning groove (12), and the third clamp spring positioning groove (14) is formed above the first clamp spring positioning groove (12);
the intelligent water control valve comprises a switch inner cylinder (2), a first control valve and a second control valve, wherein the switch inner cylinder (2) is used for blocking the fracturing hole (11) and the intelligent water control valve (3) when being positioned at a first position, the switch inner cylinder (2) is used for blocking the intelligent water control valve (3) when being positioned at a second position, is positioned below the fracturing hole (11), is used for blocking the fracturing hole (11) when being positioned at a third position, and is positioned above the intelligent water control valve (3); the switch tool is put into the well from the upper part and the lower part and is connected with the switch inner cylinder (2), and the switch tool is lifted up to drive the switch inner cylinder (2) to move upwards, so that a clamp spring (21) of the switch inner cylinder (2) is separated from a second clamp spring positioning groove (13) and moves to the position of a third clamp spring positioning groove (14), and the switch inner cylinder (2) is switched from the second position to the third position;
the intelligent water control valve comprises a columnar shell, a cavity is arranged in the middle of the shell, a fluid inlet (313) is formed in one side face of the shell, and a fluid outlet (323) is formed in the other side face of the shell;
-a free-floating disc (33) disposed within the cavity, the free-floating disc (33) adjusting a distance from the fluid inlet (313) according to a velocity and viscosity of the fluid;
wherein when a fluid having a high velocity and a low viscosity flows in, a distance between the free-floating disk (33) and the fluid inlet (313) is reduced, and the inflow of the fluid is suppressed; when a fluid with low speed and high viscosity flows in, the distance between the free floating disc (33) and the fluid inlet (313) is increased, so that the fluid is promoted to flow in;
the shell comprises a first valve body (31) and a second valve body (32) which are oppositely arranged, and the first valve body (31) comprises a first plate surface (311) and a first side edge (312); the second valve body (32) comprises a second plate surface (321) and a second side edge (322);
wherein the fluid inlet (313) is arranged on the first plate surface (311), and the fluid outlet (323) is arranged on the second plate surface (321).
2. The fracturing and intelligent water control integrated device according to claim 1, characterized in that a soluble ball seat (22) is arranged in the switch inner cylinder (2), and after the pressure-holding ball (4) is put into the device, the pressure-holding ball (4) is clamped on the soluble ball seat (22); the pressure above the pressure holding ball (4) is increased so as to push the switch inner cylinder (2) to move from the first position to the second position.
3. The fracturing and intelligent water control integrated device according to claim 2, characterized in that in an initial state, the switch inner cylinder (2) is connected with the sliding sleeve outer cylinder (1) through a shear pin (25).
4. A fracturing and intelligent water control integrated device according to claim 3, characterized in that the main bodies of the soluble ball seat (22) and the pressure holding ball (4) are made of materials which are soluble in the liquid in the switch inner cylinder (2); the surfaces of the soluble ball seat (22) and the pressure-holding ball (4) are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure.
5. The fracturing and intelligent water control integrated device according to claim 4, characterized in that an upper joint (26) is arranged at the upper end of the sliding sleeve outer cylinder (1).
6. The integrated fracturing and intelligent water control device according to claim 5, characterized in that said second plate surface (321) is provided with a support member (324), said support member (324) supporting said free floating disc (33) with a certain distance between said free floating disc (33) and said second plate surface (321).
7. The integrated fracturing and intelligent water control device according to claim 6, characterized in that said fluid inlet (313) is arranged in the centre of said first plate (311), said fluid outlet (323) is arranged on said second plate (321) on the outer ring of said support (324).
8. The integrated fracturing and intelligent water control device of claim 7, wherein the inner side of the first side (312) is sleeved with the outer side of the second side (322), and a sealing element for sealing the first side (312) and the second side (322) is arranged on the inner side of the first side (312).
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| CN114320244B (en) * | 2022-01-04 | 2023-05-09 | 西南石油大学 | Bidirectional different-channel gravel drag reduction filling and water-blocking acidizing tool |
| CN115506747B (en) * | 2022-09-28 | 2024-05-28 | 西南石油大学 | Fluid control valve control method capable of simultaneously throttling and fracturing |
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