CN113622887A - Fracturing and intelligent water control integrated device - Google Patents
Fracturing and intelligent water control integrated device Download PDFInfo
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- CN113622887A CN113622887A CN202010371465.3A CN202010371465A CN113622887A CN 113622887 A CN113622887 A CN 113622887A CN 202010371465 A CN202010371465 A CN 202010371465A CN 113622887 A CN113622887 A CN 113622887A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 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
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 7
- 238000005336 cracking Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/32—Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells
Abstract
The invention provides a fracturing and intelligent water control integrated device, which belongs to the technical field of petroleum well completion and production and comprises a cylindrical sliding sleeve outer cylinder, wherein a fracturing hole and an intelligent water control valve are arranged on the outer wall of the sliding sleeve outer cylinder; the switch inner cylinder is arranged in the sliding sleeve outer cylinder, and in an initial state, the switch inner cylinder blocks the fracturing hole and the intelligent water control valve; during fracturing operation, the switch inner cylinder blocks the intelligent water control valve and opens the fracturing hole; and when oil and water are stabilized and controlled, the switch inner cylinder blocks the fracturing hole and opens the intelligent water control valve. The invention can integrate the fracturing and intelligent water control functions into a whole, can complete the fracturing operation by one string, simultaneously realizes the intelligent water control function of the production string, does not need to put in an additional string, and can greatly save the operation cost and the tool cost of the string.
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, fracturing operation is a very effective production increasing method, and particularly, a layered transformation technology becomes an important means for increasing the production of a low-permeability oil and gas reservoir. The sliding sleeve type staged fracturing technology is an important means for unconventional oil and gas resource exploitation, and is widely applied to fracturing production increasing transformation of vertical wells, horizontal wells and directional wells of low-permeability production layers and thin oil layers.
The ball throwing sliding sleeve type fracturing tool can be put into the well bottom once without tripping the pipe column, and can be used as a production pipe column. However, the pipe column does not have the intelligent water control function, and particularly, most of the oil fields enter an ultrahigh water-cut period integrally at present, and the situation of oil stabilization and water control is very severe. The difficulty of water control in the later period of the horizontal well is high, and due to the influences of factors such as 'toe effect', reservoir heterogeneity, reservoir anisotropy, natural cracks and the like, the production profile of a long horizontal well is difficult to continuously and uniformly advance, water/gas can be seen in the heel end, the hypertonic layer section and the cracks of the oil well too early, a fast channel is formed, the oil production amount of other positions is inhibited, the serious heel end effect and unbalanced liquid supply phenomenon are easily generated, the horizontal well section has a low-efficiency section, the water can not be effectively and fully used, and the recovery ratio of the oil field is influenced.
In the existing inflow control devices, the flow channel is generally fixed, although the outflow of water/gas can be delayed, because the Flow Resistance Rating (FRR) is constant, once the water/gas cone occurs, the low-viscosity water/gas will occupy the whole wellbore and inhibit the flow of oil phase, thereby causing the production of oil well to be greatly reduced. Moreover, the fracturing operation and the water control oil production operation in the current production are generally completed by two times of pipe columns, and are realized by two tools, so that the complexity of the operation 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 the fracturing and intelligent water control functions into a whole, can complete fracturing operation by one string, simultaneously realizes the intelligent water control function of a production string, does not need additional running of the string, and can greatly save the operation cost and the tool cost of the string.
The invention provides a fracturing and intelligent water control integrated device, which comprises:
the outer wall of the sliding sleeve outer barrel 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 in an initial state, the switch inner cylinder blocks the fracturing hole and the intelligent water control valve; during fracturing operation, the switch inner cylinder blocks the intelligent water control valve and opens the fracturing hole; and when oil and water are stabilized and controlled, the switch inner cylinder blocks the fracturing hole and opens the intelligent water control valve.
The invention has the further improvement that a clamp spring is arranged on the side wall of the switch inner cylinder; a plurality of clamp 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 has the further improvement 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;
when the switch is in an initial state, the clamp spring is clamped in the first clamp spring positioning groove, and the switch inner cylinder is in a first position; during fracturing operation, the clamp spring is clamped in the second clamp spring positioning groove, and the switch inner cylinder is located at a second position; when oil and water are stabilized and controlled, the clamp spring is clamped in the third clamp spring positioning groove, and the switch inner cylinder is located at the third position.
The invention has the further improvement that the fracturing hole is arranged above the intelligent water control valve; the first clamp spring positioning groove is formed in the middle of the sliding sleeve outer cylinder, the second clamp spring positioning groove is formed below the first clamp spring positioning groove, and the third clamp spring positioning groove is formed above the first clamp spring positioning groove;
the intelligent water control valve comprises a switch inner cylinder, a pressure cracking hole, an intelligent water control valve, a pressure cracking hole and an intelligent water control valve, wherein the pressure cracking hole and the intelligent water control valve are plugged when the switch inner cylinder is located at a first position, the intelligent water control valve is plugged when the switch inner cylinder is located at a second position, the intelligent water control valve is located below the pressure cracking hole, and the pressure cracking hole is plugged when the switch inner cylinder is located at a third position, and is located 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 thrown in, the pressure holding ball is clamped on the soluble ball seat; the pressure above the pressure-building ball is increased so as to push the switch inner cylinder to move from the first position to the second position.
The invention has the further improvement that in the initial state, the switch inner cylinder is connected with the sliding sleeve outer cylinder through shear pins.
The invention is further improved in that the main bodies of the soluble ball seat and the pressure building ball are made of materials which can be dissolved in liquid in the switch inner cylinder; the surfaces of the soluble ball seat and the pressure building ball are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure.
In a further development of the invention, the switch inner cylinder is moved from the second position into the third position by a switch tool.
The invention is further improved in that the upper end of the sliding sleeve outer cylinder is provided with an upper joint.
In a further improvement of the present invention, the intelligent water control valve comprises:
the device comprises a columnar shell, a cavity is arranged in the middle of the shell, a fluid inlet is formed in one side surface of the shell, and a fluid outlet is formed in the other side surface 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 a viscosity of the fluid;
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 fluid is inhibited from flowing in; when fluid with low speed and high viscosity flows in, the distance between the free floating disc and the fluid inlet is increased, and the fluid inflow is promoted.
The invention has the further improvement that the shell comprises a first valve body and a second valve body which are oppositely arranged, and 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;
wherein the fluid inlet is provided on the first deck and the fluid outlet is provided on the second deck.
The invention is further improved in that a support member is arranged on the second plate surface, and the support member 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 on the second plate surface.
The invention has the further improvement that the inner side surface of the first side edge is sleeved with the outer side surface of the second side edge, and a sealing element for sealing the first side edge and the second side edge is arranged on the inner side surface of the first side edge.
Compared with the prior art, the invention has the advantages that:
the fracturing and intelligent water control integrated device can integrate the fracturing and intelligent water control functions into a whole, can complete fracturing operation by one string, simultaneously realizes the intelligent water control function of a production string, does not need to put in an additional string, and can greatly save the operation cost and the tool cost of the string.
In the fracturing and intelligent water control integrated device, the intelligent water control valve can automatically adjust the size of the flow channel according to different fluid properties, has the characteristics of intelligent water control and oil increase, can effectively solve the problem of high water content of an oil well, and improves the recovery ratio of an oil reservoir. 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 fluid inflow is inhibited; when fluid with low speed and high viscosity flows in, the distance between the free floating disc and the fluid inlet is increased, and the fluid inflow is promoted.
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 structural diagram of a fracturing and intelligent water control integrated device according to an embodiment of the invention, which shows a structure in an initial state;
fig. 2 is a schematic structural diagram of a fracturing and intelligent water control integrated device according to an embodiment of the invention, which shows a structure during fracturing operation;
fig. 3 is a schematic structural diagram of the integrated fracturing and intelligent water control device according to an embodiment of the invention, which shows a structure of a fracturing ball and a soluble ball seat after dissolution after fracturing operation;
fig. 4 is a schematic structural diagram of an integrated fracturing and intelligent water control device according to an embodiment of the invention, which shows a structure during oil stabilization and water control;
FIG. 5 is a schematic structural diagram of an intelligent water control valve according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a first valve body according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a second valve body according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the sliding sleeve outer cylinder, 2, the switch inner cylinder, 3, the intelligent water control valve, 4, the pressure-building ball, 11, the fracturing hole, 12, the first snap spring positioning groove, 13, the second snap spring positioning groove, 14, the third snap spring positioning groove, 15, the shear pin, 16, the top connector, 21, the snap spring, 22, the soluble ball seat, 31, the first valve body, 311, the first plate surface, 312, the first side edge, 313, the fluid inlet, 314, the sealing ring, 32, the second valve body, 321, the second plate surface, 322, the second side edge, 323, the fluid outlet, 324, the support piece, 33, the free floating disc.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
According to the fracturing and intelligent water control integrated device, the fracturing and intelligent water control functions can be integrated, fracturing operation can be completed by one pipe column, the intelligent water control function of a production pipe column is realized, an additional pipe column is not 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 barrel 1 is provided with a fracturing hole 11 and an intelligent water control valve 3. The fracturing holes 11 are radially arranged on the side wall of the sliding sleeve outer barrel 1, and a plurality of fracturing holes 11 are arranged in a 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 of the intelligent water control valve 3 faces the outer side of the sliding sleeve outer barrel 1.
When the integrated fracturing and intelligent water control device is used, as shown in fig. 1, 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; during the fracturing operation, as shown in fig. 2, the intelligent water control valve 3 is plugged by moving the switch inner cylinder 2, and the fracturing hole 11 is opened; when oil and water are stabilized and controlled, as shown in fig. 4, the switch inner cylinder 2 plugs the fracturing hole 11 and opens the intelligent water control valve 3.
Can enough realize the fracturing operation through fracturing and intelligent accuse water integrated device, also can realize steady oily accuse water.
In one embodiment, as shown in fig. 1, a snap spring 21 is disposed on a side wall of the switch inner cylinder 2, and the snap spring 21 is disposed outside the switch inner cylinder 2. A plurality of clamp spring positioning grooves are formed in the inner wall of the sliding sleeve outer cylinder 1, and the clamp springs 21 are selectively clamped in the clamp spring positioning grooves. The selective clamping is to select one of the positioning card slots to clamp in different states. For example, the snap spring positioning grooves clamped in the initial state, the fracturing operation state and the oil and water stabilizing and controlling state are different.
In a preferred embodiment, the number of the 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 an 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 located 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 at a second position; when oil and water are stabilized and controlled, the clamp spring 21 is clamped in the third clamp spring positioning groove 14, and the switch inner cylinder 2 is located at the 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 clamp spring positioning groove 12 is arranged in the middle of the sliding sleeve outer cylinder 1, the second clamp spring positioning groove 13 is arranged below the first clamp spring positioning groove 12, and the third clamp spring positioning groove 14 is arranged above the first clamp spring positioning groove 12. When the switch inner cylinder 2 is at the first position, the clamp spring 21 is clamped in the first clamp spring positioning groove 12, and the switch inner cylinder 2 is at the middle position; when the switch inner cylinder 2 is at the second position, the clamp spring 21 is clamped in the second clamp spring positioning groove 13, and the switch inner cylinder 2 is at the lower position; 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 located at the upper part. Here, "above" refers to a direction toward the wellhead, and is the left side in the drawing; "below" is the direction away from the wellhead, and in the figure is the direction to the right.
In the fracturing and intelligent water control integrated device according to the embodiment, the switch inner cylinder 2 blocks the fracturing hole 11 and the intelligent water control valve 3 when in the first position, the switch inner cylinder 2 blocks the intelligent water control valve 3 when in the second position and is located below the fracturing hole 11, and the switch inner cylinder 2 blocks the fracturing hole 11 when in the third position and is located above the intelligent water control valve 3.
In one embodiment, a soluble ball seat 22 is arranged in the switch inner barrel 2, and the soluble ball seat 22 can be matched with the pressure building ball 4. After the pressure-holding ball 4 is put in, the pressure-holding ball 4 is clamped on the soluble ball seat 22; the pressure above the pressure build-up ball 4 increases to push the switch inner barrel 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 required, the pressure holding ball 4 is put 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-building 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 hole 11 is exposed, and fracturing operation is carried out through the fracturing hole 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 shear pins 25. The mode that the shear pins 25 are connected 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 avoids exposing the fracturing hole 11 or the intelligent water control valve 3 in advance. After the pressure-building ball 4 is put in, the pressure above the ball increases to a certain value, and the shear pin 25 is cut off under the action of the pressure, so that the switch inner cylinder 2 is separated from the sliding sleeve outer cylinder 1.
In one embodiment, as shown in fig. 2, the soluble ball seat 22 and the body of the pressure build ball 4 are made of a material soluble in the liquid in the switch inner barrel 2; the surfaces of the soluble ball seat 22 and the pressure building ball 4 are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure to realize the full diameter in the pipe (as shown in figure 3).
In one embodiment, the switch inner cylinder 2 is moved from the second position to the third position by a switching tool. And a switch tool is put into the well from the top down to the bottom 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 barrel 1 through threads, and an upstream component is connected through the upper joint 26.
When using fracturing and intelligent accuse water integrated device according to this embodiment, when being in the state of going into the well, switch inner tube 2 is in the first position, and jump ring 21 joint is in first jump ring constant head tank 12. The switch inner cylinder 2 shields the fracturing hole 11 and the intelligent water control valve 3, and sealing parts are arranged at the upper end and the lower end of the switch inner cylinder 2 and can seal the fracturing hole 11 and the intelligent water control valve 3. The whole device is internally and externally sealed to prevent the well bore from being communicated with reservoir fluid.
When the device of the embodiment is put into a designed position, a fracturing function is started, the soluble pressure-building ball 4 is put in, when the pressure-building ball 4 reaches the position of the soluble ball seat 22, the pressure-building ball forms a seal with the cambered surface of the soluble ball seat 22, the pressure building in the pipe is realized, and when the pressure in the pipe is increased to be larger than the shearing value of the shear pin 25, the shear pin 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 the 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, a first channel of the device and reservoir fluid is established, and after the fracturing hole 11 is completely exposed, the first channel is completely opened, so that fracturing operation can be carried out.
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 the liquid in the pipe and is completely dissolved, so that the full drift diameter in the pipe is realized.
The first passage may then be closed and a second fluid passage between the wellbore and the reservoir opened for well production operations. By lowering the switch tool, the switch inner cylinder 2 is lifted up, so that the snap spring 21 is separated from the second snap spring positioning groove 13 to reach the third snap spring positioning groove 14, and the switch inner cylinder 2 is fixed at the position. At this time, the switch inner cylinder 2 completely closes the fracturing hole 11, namely the first fluid channel is closed, the intelligent water control valve 3 is opened, and a second fluid channel between the reservoir and the shaft is established, namely the channel for the reservoir fluid to enter the shaft, the channel is a one-way channel, only the reservoir fluid is allowed to enter the shaft, and the shaft fluid is not allowed 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 arranged in the middle of the shell. A fluid inlet 313 is provided on one side of the housing and a fluid outlet 323 is provided on the other side. Fluid enters the housing from the fluid inlet 313, passes through the cavity and exits through the fluid outlet 323. In this embodiment, the intelligent water control valve 3 further includes a free floating disc 33, and the free floating disc 33 is disposed in the cavity, is not connected to the cavity, and can freely move in the cavity. The free floating disc 33 adjusts the distance from the fluid inlet 313 according to 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 higher water content and lower gas content has low speed and high viscosity; the fluid with small water content and large gas content has high speed and low viscosity.
When a fluid with high speed and low viscosity flows in, the distance between the free floating disc 33 and the fluid inlet 313 is reduced, and the fluid is inhibited from flowing in; when a fluid having a low velocity and a high viscosity flows in, the distance between the free floating disk 33 and the fluid inlet 313 increases, and the inflow of the fluid is promoted.
In one embodiment, the housing includes a first valve body 31 and a second valve body 32 disposed opposite each other. The first valve body 31 includes a first plate 311 and a first side 312, the first plate 311 is preferably of a circular structure, the first side 312 is of a cylindrical structure, and an edge of the first plate 311 is connected to the first side 312. An opening is formed at an end of the first side edge 312 away from the first board surface 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 panel 321 has a circular configuration, the second side 322 has a cylindrical configuration, and the diameters of the second panel 321 and the second side 322 are slightly smaller than the diameters of the first panel 311 and the first side 312. The edge of the second panel 321 is connected to the second side edge 322. An opening is formed at an end of the second side edge 322 away from the second plate 321. In the present embodiment, the first valve body 31 and the second valve body 32 are disposed oppositely, which means that the openings of the first valve body 31 and the second valve body 32 are opposite.
In the embodiment shown in fig. 5, the first valve body 31 and the second valve body 32 are connected in a plug-in manner, and the second valve body 32 is plugged into the first valve body 31. The first side 312 is connected to the second side 322, and the first panel 311 is separated from the second panel 321 by a distance supported by the first side 312 and the second side 322, so as to form a cavity. In the present embodiment, as shown in fig. 6, the fluid inlet 313 is provided on the first plate surface 311, and the fluid outlet 323 is provided on the second plate surface 321.
In the intelligent water control device according to the embodiment, the housing comprises the first valve body 31 and the second valve body 32, and is convenient to assemble or disassemble in a split mode. The first valve body 31 and the second valve body 32 may be welded or detachably connected by a screw connection or the like.
In one embodiment, as shown in fig. 7, the second plate 321 is provided with a support 324, and the support 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 a certain minimum distance is provided between the free floating disc 33 and the second plate surface 321. The freely floating disc 33 is also at a distance from the second plate 321 when it is moved to abut against the second plate 321. The supporting member 324 may be a plurality of pillar-shaped structures separated from each other, or may be an annular whole.
In the intelligent water control device according to the embodiment, the support 324 supports the free floating disc 33, so that a certain distance can be ensured between the free floating disc 33 and the second plate surface 321, on one hand, the free floating disc 33 is prevented from blocking the fluid outlet 323, and on the other hand, a certain lifting force can be provided for the free floating disc 33 by a space between the free floating disc 33 and the second plate surface 321. As the velocity of the fluid increases, the pressure between the free floating disk 33 and the second plate surface 321 increases, the lift force increases, and 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 lift force, and the distance between the free floating disk 33 and the first plate surface 311 is increased by moving the free floating disk 33 toward the second plate surface 321, thereby 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 in the outer ring of the support 324 on the second plate 321. The support 324 is centrally disposed on the second deck 321 and the fluid outlet 323 is disposed proximate an edge of the second deck 321. The fluid outlet 323 is arranged outside said support ring preventing the support ring from blocking the fluid flow and thereby influencing the fluid to be discharged 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 sealing groove is formed on the inner side surface of the first side 312, a ring of sealing ring 314 is arranged 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 has different physical properties such as viscosity, speed and density of fluid due to different water content of the fluid. The flow lines generated by the fluids with different physical properties passing through the intelligent water control valve 3 in the embodiment are also different.
When a fluid with a high air content and a low water content passes through, due to the low viscosity and the high flow rate of the fluid, high-speed low pressure is generated in the fluid entering direction of the free floating disc 33, and a lifting force for moving the free floating disc 33 in the fluid entering direction is formed between the free floating disc 33 and the second valve body 32, and the lifting force moves the floating disc in the fluid inlet 313 direction. In this way, the space between the end of the inner side surface of the first valve body 31 and the side of the freely floating disc 33 close to the fluid inlet 313 is reduced, that is, the opening degree of the freely floating disc 33 is reduced, so that the flow passage between the first valve body 31 and the freely floating disc 33 is reduced, the flow rate of the fluid passing through the first valve body 31 and the freely floating disc 33 is reduced, and thus the effect of reducing or suppressing the outflow of the fluid is achieved, and the fluid is reduced or prevented from reaching the outlet through the flow passage.
When fluid with low gas content and high water content passes through, due to high viscosity and low flow speed of the fluid, low-speed high pressure is generated in the fluid entering direction of the free floating disc 33, and under the action of the high pressure, the fluid can provide pressure for the free floating disc 33, so that the free floating disc 33 moves towards one side of the second valve body 32. Thus, the distance between the first plate surface 311 and the freely floating disk 33 is increased, the opening degree of the freely floating disk 33 is increased, the flow passage between the first valve element 31 and the freely floating disk 33 is increased, and the flow rate of the fluid passing through the first valve element 31 and the freely floating disk 33 is decreased, thereby achieving the effect of increasing or promoting the outflow of the fluid.
In the fracturing and intelligent water control integrated device, when the intelligent water control valve 3 is applied to a block with high water content, most of water can be isolated in the stratum, and the output of other intervals is improved, so that the recovery ratio of the whole shaft is improved. 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 due to the lower viscosity of the gas, inhibiting the gas from entering the wellbore. Therefore, the intelligent water control valve 3 has the effects of actively controlling water/gas and increasing oil, and can greatly improve the oil 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. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (14)
1. The utility model provides a fracturing and intelligent accuse water integrated device which characterized in that includes:
the water-saving water dispenser comprises a cylindrical sliding sleeve outer barrel (1), wherein a fracturing hole (11) and an intelligent water control valve (3) are formed in the outer wall of the sliding sleeve outer barrel (1); and
the switch inner cylinder (2) is arranged in the sliding sleeve outer cylinder (1), and in an initial state, the switch inner cylinder (2) blocks the fracturing hole (11) and the intelligent water control valve (3); during fracturing operation, the switch inner cylinder (2) plugs the intelligent water control valve (3) and opens the fracturing hole (11); when oil and water are stabilized and controlled, the switch inner cylinder (2) plugs the fracturing hole (11) and opens the intelligent water control valve (3).
2. The integrated fracturing and intelligent water control device of claim 1, wherein a clamp spring (21) is arranged on the side wall of the switch inner cylinder (2); a plurality of clamp spring positioning grooves are formed in the inner wall of the sliding sleeve outer cylinder (1); the clamp spring (21) is selectively clamped in the clamp spring positioning groove.
3. The integrated fracturing and intelligent water control device of claim 2, wherein the snap spring positioning grooves comprise a first snap spring positioning groove (12), a second snap spring positioning groove (13) and a third snap spring positioning groove (14);
when the switch is 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 in 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 located at a second position; when oil and water are stabilized and controlled, the clamp spring (21) is clamped in the third clamp spring positioning groove (14), and the switch inner cylinder (2) is located at the third position.
4. The integrated fracturing and intelligent water control device according to claim 3, wherein 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 is characterized in that the fracturing hole (11) and the intelligent water control valve (3) are plugged when the switch inner cylinder (2) is located at a first position, the intelligent water control valve (3) is plugged when the switch inner cylinder (2) is located at a second position and is located below the fracturing hole (11), and the fracturing hole (11) is plugged when the switch inner cylinder (2) is located at a third position and is located above the intelligent water control valve (3).
5. The integrated fracturing and intelligent water control device according to claim 2 or 4, wherein a soluble ball seat (22) is arranged in the switch inner cylinder (2), and after a pressure holding ball (4) is thrown in, the pressure holding ball (4) is clamped on the soluble ball seat (22); the pressure above the pressure-building ball (4) is increased so as to push the switch inner cylinder (2) to move from the first position to the second position.
6. The integrated fracturing and intelligent water control device according to claim 5, wherein in an initial state, the switch inner cylinder (2) is connected with the sliding sleeve outer cylinder (1) through shear pins (25).
7. The integrated fracturing and intelligent water control device according to claim 6, wherein the soluble ball seat (22) and the pressure holding ball (4) are made of materials soluble in the liquid in the switch inner cylinder (2); the surfaces of the soluble ball seat (22) and the pressure building ball (4) are provided with insoluble coatings, and the insoluble coatings are broken under certain pressure.
8. The integrated fracturing and intelligent water control device according to claim 7, wherein the switch inner barrel (2) is moved from the second position to the third position by a switch tool.
9. The integrated fracturing and intelligent water control device according to any one of claims 1 to 8, wherein the upper end of the sliding sleeve outer cylinder (1) is provided with an upper joint (26).
10. The integrated fracturing and intelligent water control device according to any one of claims 1 to 9, wherein the intelligent water control valve comprises a cylindrical shell, a cavity is arranged in the middle of the shell, a fluid inlet (313) is arranged on one side surface of the shell, and a fluid outlet (323) is arranged on the other side surface 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) as a function of a velocity and a viscosity of the fluid;
when fluid with high speed and low viscosity flows in, the distance between the free floating disc (33) and the fluid inlet (313) is reduced, and the fluid inflow is inhibited; when a fluid having a low speed and a high viscosity flows in, the distance between the free floating disk (33) and the fluid inlet (313) is increased, and the inflow of the fluid is promoted.
11. The integrated fracturing and intelligent water control device of claim 10, wherein the housing 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 provided on the first deck (311) and the fluid outlet (323) is provided on the second deck (321).
12. The integrated fracturing and intelligent water control device of claim 11, wherein a support (324) is arranged on the second plate surface (321), and the support (324) supports the free floating disc (33) to enable a certain distance to be reserved between the free floating disc (33) and the second plate surface (321).
13. The integrated fracturing and intelligent water control device of claim 12, wherein the fluid inlet (313) is arranged at the center of the first deck (311) and the fluid outlet (323) is arranged at the outer ring of the support (324) on the second deck (321).
14. The integrated fracturing and intelligent water control device of claim 13, wherein the inner side of the first side (312) is sleeved with the outer side of the second side (322), and a sealing member 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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| CN202010371465.3A CN113622887B (en) | 2020-05-06 | 2020-05-06 | Fracturing and intelligent water control integrated device |
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| CN202010371465.3A CN113622887B (en) | 2020-05-06 | 2020-05-06 | Fracturing and intelligent water control integrated device |
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| CN113622887B (en) | 2024-02-27 |
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