CN113622868A - Differential pressure type sliding sleeve with water control function - Google Patents
Differential pressure type sliding sleeve with water control function Download PDFInfo
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- CN113622868A CN113622868A CN202010371694.5A CN202010371694A CN113622868A CN 113622868 A CN113622868 A CN 113622868A CN 202010371694 A CN202010371694 A CN 202010371694A CN 113622868 A CN113622868 A CN 113622868A
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- sliding sleeve
- inner cylinder
- water control
- switch
- differential pressure
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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
- E21B43/25—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
- 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 differential pressure type sliding sleeve with a water control function, 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 a water control valve are arranged on the outer wall of the sliding sleeve outer cylinder; the sliding sleeve inner cylinder is arranged in the sliding sleeve outer cylinder and comprises a switch inner cylinder and a hydraulic inner cylinder which are connected in a separable mode; in an initial state, the switch inner cylinder blocks the fracturing hole and the water control valve; during fracturing operation, the switch inner cylinder blocks the 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 water control valve. The invention can complete the fracturing operation by one string, simultaneously realize 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 differential pressure type sliding sleeve with a water control function, and belongs to the technical field of petroleum well completion and production.
Background
In the exploration and development process of an oil and gas field, the fracturing technology is an important technical means for realizing the yield increase of the oil and gas field, and for a compact oil and gas field, the fracturing technology is an indispensable technical means, the differential pressure type sliding sleeve is an essential part for realizing the first-stage fracturing operation, and high-pressure fluid is pumped into the differential pressure type sliding sleeve through the ground, so that the differential pressure type sliding sleeve slides and opens under the action of differential pressure, and a connecting channel between a stratum and a shaft is established.
At present, most oil fields are in an ultrahigh water content period integrally, and the situation of stabilizing oil and controlling water 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.
At present, fracturing operation and water control oil production operation in production are generally completed by two times of pipe columns and are realized by two tools. The existing differential pressure type sliding sleeve does not have a water control function, is used as an essential part for realizing the first-stage fracturing operation, is only used for establishing a connecting channel between a stratum and a shaft, and cannot be closed after the differential pressure type sliding sleeve is opened, so that the flow of stratum fluid flowing into the shaft cannot be controlled.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the differential pressure type sliding sleeve with the water control function, which can complete fracturing operation once by once tubular column, simultaneously realize the intelligent water control function of a production tubular column, does not need additional tubular column running, and can greatly save the tubular column operation cost and the tool cost.
The invention provides a differential pressure type sliding sleeve with a water control function, which comprises:
the outer wall of the sliding sleeve outer barrel is provided with a fracturing hole and a water control valve; and
the sliding sleeve inner cylinder is arranged in the sliding sleeve outer cylinder and comprises a switch inner cylinder and a hydraulic inner cylinder which are connected in a separable mode;
in an initial state, the switch inner cylinder blocks the fracturing hole and the water control valve; during fracturing operation, the switch inner cylinder blocks the 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 water control valve.
The invention has the further improvement that a first clamp spring is arranged on the side wall of the switch inner cylinder, and a second clamp spring is arranged on the side wall of the hydraulic inner cylinder; a first clamp spring positioning groove and a third clamp spring positioning groove which are matched with the first clamp spring and a second clamp spring positioning groove which is matched with the second clamp spring are formed in the sliding sleeve outer sleeve;
when the switch is in an initial state, the first 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 second 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 first clamp spring is clamped in the third clamp spring positioning groove, and the switch inner cylinder is located at the third position.
The invention is further improved in that when the switch inner cylinder is located at the first position, the hydraulic inner cylinder is connected with the sliding sleeve outer cylinder through a first shear pin, and the switch inner cylinder is connected with the hydraulic inner cylinder through a second shear pin.
The invention has the further improvement that the fracturing hole is arranged at the upper part of the outer barrel of the sliding sleeve, a water control through hole is arranged below the fracturing hole, and the water control valve is arranged in the water control through hole;
the first clamp spring positioning groove is formed in the middle of the sliding sleeve outer barrel, the second clamp spring positioning groove is formed in the lower portion of the sliding sleeve outer barrel, and the third clamp spring positioning groove is formed above the first clamp spring positioning groove.
The invention has the further improvement that a pressure end face is formed between the upper end of the sliding sleeve inner cylinder and the sliding sleeve outer cylinder, a pressure difference is formed above and below the pressure end face, and when the pressure difference reaches a certain value, the first shear pin is sheared off.
The invention has the further improvement that a claw-shaped connecting piece matched with a switch tool is arranged on the switch inner cylinder, and the switch tool is connected with the switch inner cylinder when being clamped on the claw-shaped connecting piece;
when the switch tool is lifted up, the second shear pin is sheared off when the lifting force reaches a certain value; the switch inner cylinder is separated from the hydraulic inner cylinder and moves to the third position with the switch tool.
The invention is further improved in that the upper part and the lower part of the contact surface of the switch inner cylinder and the sliding sleeve outer cylinder are both provided with sealing elements.
The invention is further improved in that the upper end of the sliding sleeve outer cylinder is provided with an upper joint.
The invention has the further improvement that the water control valve comprises a columnar shell, a cavity is arranged in the middle of the shell, a fluid inlet is arranged on one side surface of the shell, and a fluid outlet is arranged on the other side surface of the shell; a free floating disc is arranged in the cavity, and the distance between the free floating disc and the fluid inlet is adjusted according to the speed and the 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 differential pressure type sliding sleeve with the water control function has the fracturing function and the water control function, and can be opened and closed through differential pressure; two channels for wellbore and formation fluids, a fracturing port, may be provided, which may be closed after fracturing is complete; and the water control valve is used for stabilizing oil and controlling water and improving the oil reservoir recovery ratio. The method can effectively solve the problem of water or gas coning, and can separate most of water in the stratum and improve the output of other intervals when being particularly applied to a block with high water content, thereby improving the recovery ratio of the whole shaft.
In the differential pressure type sliding sleeve with the water control function, the 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 view of a differential pressure type sliding sleeve with a water control function according to an embodiment of the present invention, showing an initial structure;
FIG. 2 is a schematic structural diagram of a differential pressure type sliding sleeve with a water control function according to an embodiment of the present invention, showing the structure during fracturing operation;
FIG. 3 is a schematic structural diagram of a differential pressure type sliding sleeve with water control function according to an embodiment of the present invention, showing a structure for stabilizing oil and controlling water;
FIG. 4 is a schematic structural view of a water control valve according to an embodiment of the present invention;
FIG. 5 is a schematic view of a first valve body according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram 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 hydraulic valve comprises a sliding sleeve outer cylinder, 2, a sliding sleeve inner cylinder, 3, a water control valve, 11, a fracturing hole, 12, a first snap spring positioning groove, 13, a second snap spring positioning groove, 14, a third snap spring positioning groove, 15, a first shear pin, 16, an upper joint, 21, a switch inner cylinder, 22, a hydraulic inner cylinder, 211, a first snap spring, 212, a claw-shaped connecting piece, 213, a pressure end face, 214, a sealing piece, 221, a second snap spring, 222, a second shear pin, 31, a first valve body, 311, a first plate face, 312, a first side edge, 313, a fluid inlet, 314, a sealing ring, 32, a second valve body, 321, a second plate face, 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 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.
Fig. 1 schematically shows a differential pressure type sliding sleeve with a water control function according to an embodiment of the invention, which comprises a sliding sleeve outer barrel 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 a 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 water control valve 3 is arranged on the side wall of the sliding sleeve outer cylinder 1, the water control valve 3 is a single valve, and the inflow direction of the water control valve is from the inner side of the sliding sleeve outer cylinder 1 to the outer side of the sliding sleeve outer cylinder 1.
When the differential pressure type sliding sleeve with the water control function according to the embodiment is used, when a well is entered, as shown in fig. 1, the switch inner cylinder 21 is in an initial state, and the whole sliding sleeve outer cylinder 1 is in a through state; during the fracturing operation, as shown in fig. 2, the inner switch cylinder 21 is moved to plug the water control valve 3 and open the fracturing hole 11; when oil and water are stabilized and controlled, as shown in fig. 3, the switch inner cylinder 21 blocks the fracturing hole 11 and opens the water control valve 3.
In one embodiment, as shown in fig. 1, a first snap spring 211 is disposed on a side wall of the switch inner cylinder 21, and the first snap spring 211 is disposed on an outer wall of the switch inner cylinder 21. The inner wall of the sliding sleeve outer cylinder 1 is provided with a first snap spring positioning groove 12 and a third snap spring positioning groove 14. The first clamp spring 211 can be selectively clamped in the first clamp spring positioning slot 12 or the third clamp spring positioning slot 14. The selective clamping here refers to that one of the positioning clamping grooves is selected to be clamped in different states, for example, in an initial state, the first clamping spring 211 is clamped in the first clamping spring positioning groove 12, and in an oil-stabilizing and water-controlling state, the first clamping spring 211 is clamped in the third clamping spring positioning groove 14. The side wall of the hydraulic inner cylinder 22 is provided with a second snap spring 221, and the inner wall of the sliding sleeve outer cylinder 1 is also provided with a second snap spring positioning groove 13.
In the differential pressure type sliding sleeve with the water control function according to this embodiment, in an initial state, the first snap spring 211 is snapped in the first snap spring positioning groove 12, and the sliding sleeve inner cylinder 2 is at a first position; during fracturing operation, the second clamp spring 221 is clamped in the second clamp spring positioning groove 13, and the sliding sleeve inner cylinder 2 is located at a second position; when oil and water are stabilized and controlled, the first snap spring 211 is clamped in the third snap spring positioning groove 14, and the sliding sleeve inner cylinder 2 is located at the third position.
In a preferred embodiment, when the switch inner cylinder 21 is in the first position, the hydraulic inner cylinder 22 is connected to the sliding sleeve outer cylinder 1 through the first shear pin 15, and the switch inner cylinder 21 is connected to the hydraulic inner cylinder 22 through the second shear pin 222.
When the differential pressure type sliding sleeve with the water control function according to the embodiment is used, in an initial state, the switch inner cylinder 21 is in the first position. The sliding sleeve outer cylinder 1 and the sliding sleeve inner cylinder 2 are connected through the first shear pin 15, so that mutual sliding between the two is avoided. In the sliding sleeve inner cylinder 2, the switch inner cylinder 21 and the hydraulic inner cylinder 22 are connected through the second shear pin 222, so that the sliding sleeve inner cylinder 2 is an integral body in an initial state.
In one embodiment, the fracturing port 11 is arranged above the water control valve 3 with a distance between them. The sliding sleeve outer barrel 1 is provided with a water control through hole, the water control barrel body is arranged below the fracturing hole 11, and the water control valve 3 is arranged in the water control through hole. 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 21 is at the first position, the first clamp spring 211 is clamped in the first clamp spring positioning groove 12, and the switch inner cylinder 21 is at the middle position; when the switch inner cylinder 21 is at the second position, the second clamp spring 221 is clamped in the second clamp spring positioning groove 13, and the switch inner cylinder 21 is at the lower position; in the third position, the first snap spring 211 is snapped in the third snap spring positioning groove 14, the switch inner cylinder 21 is separated from the hydraulic inner cylinder 22, the second snap spring 221 is still snapped in the second snap spring positioning groove 13, and the switch inner cylinder 21 is located at the upper position.
In the differential pressure type sliding sleeve with the water control function according to this embodiment, the switch inner cylinder 21 plugs the fracturing hole 11 and the water control valve 3 when in the first position, the switch inner cylinder 21 plugs the water control valve 3 when in the second position and is located below the fracturing hole 11, and the switch inner cylinder 21 plugs the fracturing hole 11 when in the third position and is located above the water control valve 3.
In one embodiment, a pressure end surface 213 is formed between the upper end of the sliding sleeve inner cylinder 2 and the sliding sleeve outer cylinder 1, when the fracturing fluid enters the differential pressure type sliding sleeve with the water control function described in this embodiment, a pressure difference is formed above and below the pressure end surface 213, and when the pressure difference reaches a certain value, the first shear pin 15 is sheared. At this time, under the action of pressure, the first clamp spring 211 slides out of the first clamp spring positioning groove 12; the sliding sleeve inner barrel 2 integrally moves downwards. And stops when the second clamp spring 221 moves to the position of the second clamp spring positioning groove 13.
When the differential pressure type sliding sleeve with the water control function is used, after the sliding sleeve is put into a well, fracturing fluid is introduced, and the fracturing fluid forms pressure difference above and below the pressure end face 213 to provide downward thrust for the pressure end face 213. When the pressure is increased to a certain value, the first shear pin 15 is sheared, and the sliding sleeve inner cylinder 2 moves downwards under the action of the pressure. When the hydraulic inner cylinder 22 of the sliding sleeve inner cylinder 2 moves to the lowest end, the second snap spring 221 is clamped in the second snap spring positioning groove 13, so that the movement is stopped, and the switch inner cylinder 21 is located at the second position. In the process that the switch inner cylinder 21 moves from the first position to the second position, the fracturing hole 11 located at the upper part is gradually exposed, and fracturing operation is performed through the fracturing hole 11.
In one embodiment, the inner wall of the switch inner cylinder 21 is provided with a claw-shaped connector 212, and the claw-shaped connector 212 is used for clamping with a switch tool. After the fracturing operation is finished, a switch tool is put into the ground, and the switch is connected with the switch inner cylinder 21 when being clamped on the claw-shaped connecting piece 212.
After the fracturing operation is completed, the switch tool is connected with the switch inner cylinder 21 by being put in, the switch tool is lifted up to separate the switch inner cylinder 21 from the hydraulic inner cylinder 22, and when the lifting force is greater than the shearing force of the second shear pin 222, the switch inner cylinder 21 is separated from the hydraulic inner cylinder 22. Then, the switch inner cylinder 21 moves from the second position to the third position under the pulling force of the switch tool, gradually shields the fracturing hole 11 in the moving process, and exposes the water control valve 3, so that oil and water stabilizing and controlling operations are performed.
In one embodiment, the upper and lower portions of the contact surfaces of the switch inner cylinder 21 and the sliding sleeve outer cylinder 1 are provided with seals 214. In the first position, the two sealing elements 214 above and below the switch inner cylinder 21 can seal the contact surface between the switch inner cylinder 21 and the sliding sleeve outer cylinder 1, and seal the fracturing hole 11 and the water control valve 3. Preferably, the upper and lower parts of the contact surface of the hydraulic inner cylinder 22 and the sliding sleeve outer cylinder 1 are also provided with sealing parts 214.
In one embodiment, the upper end of the sliding sleeve outer cylinder 1 is provided with an upper joint 16. The upper joint 16 is connected with the sliding sleeve outer barrel 1 through threads, and an upstream component is connected through the upper joint 16.
In one embodiment, the 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 323313 is provided on one side of the housing and a fluid outlet is provided on the other side. Fluid enters the housing from the fluid inlet 323313, passes through the cavity and exits through the fluid outlet. In this embodiment, the 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 323313 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 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 fluid with high speed and low viscosity flows in, the distance between the free floating disc 33 and the fluid inlet 323313 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 323313113 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. 4, 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 this embodiment, as shown in fig. 5, the fluid inlet 323313 is disposed on the first board 311, and the fluid outlet is disposed on the second board 321.
In the differential pressure type sliding sleeve with the water control function according to the embodiment, the housing of the intelligent water control device comprises the first valve body 31 and the second valve body 32, and the intelligent water control device 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 a screw connection or the like.
In one embodiment, as shown in fig. 6, 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 differential pressure type sliding sleeve with the water control function 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 a fluid outlet, and on the other hand, a certain lifting force can be provided for the free floating disc 33 by the 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 323313 is disposed in the center of the first deck 311 and the fluid outlet is disposed in the outer ring of the support 324 on the second deck 321. The support 324 is positioned centrally on the second deck 321 and the fluid outlet is positioned adjacent the edge of the second deck 321. The fluid outlet is disposed outside of the support ring to prevent the support ring from blocking fluid flow to affect fluid discharge through the fluid outlet.
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 differential pressure type sliding sleeve with the water control function according to the embodiment, the physical properties such as viscosity, speed and density of the fluid are different due to different water content of the fluid. The flow rate of the fluid with different physical properties generated by passing through the water control valve 3 is 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 direction of the fluid inlet 323313. 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 323313 is reduced, that is, the opening degree of the freely floating disc 33 becomes smaller, resulting in a smaller flow passage between the first valve body 31 and the freely floating disc 33, and a reduced flow rate of the fluid passing through the first valve body 31 and the freely floating disc 33, thereby achieving the effect of reducing or suppressing the outflow of the fluid, and reducing or preventing the fluid from passing through the flow passage to reach the outlet.
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 this embodiment, when the water control valve 3 is applied to a block with high water content, most of water can be blocked in the formation, and the output of other intervals is increased, so that the recovery ratio of the whole wellbore is increased. 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 water control valve 3 of the embodiment has the effects of actively controlling water/gas and increasing oil, and can greatly improve the oil recovery ratio.
When the differential pressure type sliding sleeve with the water control function according to the embodiment is used, when the sliding sleeve is in a well-entering state, the sliding sleeve inner cylinder 2 is a whole body formed by connecting the switch inner cylinder 21 and the hydraulic inner cylinder 22, the switch inner cylinder 21 and the hydraulic inner cylinder 22 are connected through the second shear pins 222, and meanwhile, the sliding sleeve inner cylinder 2 and the sliding sleeve outer cylinder 1 are connected through the first shear pins 15. The switch inner cylinder 21 is at the first position, and the first snap spring 211 is clamped in the first snap spring positioning groove 12. The switch inner cylinder 21 shields and seals the fracturing hole 11 and the water control valve 3, and the upper end and the lower end of the switch inner cylinder 21 are provided with sealing parts 214 which can seal the fracturing hole 11 and the water control valve 3. The fracturing hole 11 and the water control valve 3 are in a closed state, and the whole differential pressure type sliding sleeve is an integrally sealed pipe column.
When the sliding sleeve is lowered to the designed position, the fracturing operation is started. When the fracturing operation is started, the high-pressure fluid in the sliding sleeve is suppressed, a certain pressure difference is formed between the pressure end surface 213 of the switch inner cylinder 21 and the sliding sleeve outer cylinder 1, and when the pressure difference reaches the shearing pressure of the first shear pin 15 connected between the hydraulic inner cylinder 22 and the sliding sleeve outer tube, the first shear pin 15 is sheared. Under the action of pressure, the sliding sleeve inner cylinder 2 and the second clamp spring 221 on the outer wall of the sliding sleeve inner cylinder move downwards integrally until the second clamp spring 221 is clamped in the second clamp spring positioning groove 13, the fracturing hole 11 is exposed completely, a first circulation channel between the sliding sleeve and the bottom layer is opened, first-stage fracturing is started, and well bore fracturing fluid enters the stratum.
After the fracturing operation is completed, the opening and closing tool is lowered to connect the opening and closing tool with the opening and closing inner cylinder 21. And lifting the switch tool, wherein when the lifting force is greater than the shearing pressure of the second shear pin 222, the second shear pin 222 is sheared, the switch inner cylinder 21 and the first snap spring 211 on the switch inner cylinder move upwards along with the switch tool, and when the first snap spring 211 moves to the position of the third snap spring positioning groove 14, the switch inner cylinder 21 is in the state of the third position.
At the moment, the water control valve 3 on the sliding sleeve outer cylinder 1 is exposed, a second fluid passage between the stratum and the shaft is established, and the stratum fluid enters the shaft through the water control valve 3. According to different oil reservoir characteristics, stratum pressure and the like, the water control valve 3 can be designed into different flow passage structures for oil extraction and water control, resistance is generated on water, inflow of oil is increased, and inflow of water is reduced. Thereby achieving the effects of stabilizing oil and controlling water and improving the recovery ratio of the oil reservoir. The device can effectively solve the problem of edge bottom water coning, and can separate most of water in the stratum and improve the output of other intervals when being particularly applied to a block with high water content, thereby improving the recovery ratio of the whole shaft.
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 (13)
1. The utility model provides a differential pressure type sliding sleeve that possesses accuse water function which characterized in that includes:
the outer wall of the cylindrical sliding sleeve outer cylinder (1) is provided with a fracturing hole (11) and a water control valve (3); and
the sliding sleeve inner cylinder (2) is arranged in the sliding sleeve outer cylinder (1), and the sliding sleeve inner cylinder (2) comprises a switch inner cylinder (21) and a hydraulic inner cylinder (22) which are connected in a separable manner;
in an initial state, the switch inner cylinder (21) plugs the fracturing hole (11) and the water control valve (3); during fracturing operation, the switch inner cylinder (21) plugs the water control valve (3) and opens the fracturing hole (11); when oil and water are stabilized and controlled, the switch inner cylinder (21) plugs the fracturing hole (11) and opens the water control valve (3).
2. The differential pressure type sliding sleeve with the water control function according to claim 1, wherein a first snap spring (211) is arranged on the side wall of the switch inner cylinder (21), and a second snap spring (221) is arranged on the side wall of the hydraulic inner cylinder (22); a first clamp spring positioning groove (12) and a third clamp spring positioning groove (14) which are matched with the first clamp spring (211) and a second clamp spring positioning groove (13) which is matched with the second clamp spring (221) are formed in the sliding sleeve outer sleeve;
when the switch is in an initial state, the first clamp spring (211) is clamped in the first clamp spring positioning groove (12), and the switch inner cylinder (21) is in a first position; during fracturing operation, the second clamp spring (221) is clamped in the second clamp spring positioning groove (13), and the switch inner cylinder (21) is located at a second position; when oil and water are stabilized and controlled, the first clamp spring (211) is clamped in the third clamp spring positioning groove (14), and the switch inner cylinder (21) is located at the third position.
3. The differential pressure type sliding sleeve with the water control function according to claim 2, wherein when the switch inner cylinder (21) is in the first position, the hydraulic inner cylinder (22) is connected with the sliding sleeve outer cylinder (1) through a first shear pin (15), and the switch inner cylinder (21) is connected with the hydraulic inner cylinder (22) through a second shear pin (222).
4. The differential pressure type sliding sleeve with the water control function according to claim 3, wherein the fracturing hole (11) is arranged at the upper part of the outer sleeve barrel (1), a water control through hole is arranged below the fracturing hole (11), and the water control valve (3) is installed in the water control through hole;
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 in the lower portion of the sliding sleeve outer cylinder (1), and the third clamp spring positioning groove (14) is formed above the first clamp spring positioning groove (12).
5. The differential pressure type sliding sleeve with the water control function according to claim 4, wherein a pressure end face (213) is formed between the upper end of the sliding sleeve inner cylinder (2) and the sliding sleeve outer cylinder (1), a pressure difference is formed above and below the pressure end face (213), and when the pressure difference reaches a certain value, the first shear pins (15) are sheared.
6. The differential pressure type sliding sleeve with the water control function according to claim 5, wherein the switch inner cylinder (21) is provided with a claw-shaped connecting piece (212) matched with a switch tool, and the switch tool is connected with the switch inner cylinder (21) when being clamped on the claw-shaped connecting piece (212);
when the switch tool is lifted up, the second shear pin (222) is sheared when the lifting force reaches a certain value; the switch inner cylinder (21) is separated from the hydraulic inner cylinder (22) and moves to the third position with the switch tool.
7. The differential pressure type sliding sleeve with the water control function according to any one of claims 4 to 6, wherein the upper part and the lower part of the contact surface of the switch inner cylinder (21) and the sliding sleeve outer cylinder (1) are provided with a sealing piece (214).
8. The differential pressure type sliding sleeve with the water control function according to claim 7 is characterized in that the upper end of the outer sleeve (1) of the sliding sleeve is provided with an upper joint (16).
9. The differential pressure type sliding sleeve with the water control function according to claim 1, wherein the water control valve (3) comprises a cylindrical shell, a cavity is arranged in the middle of the shell, a fluid inlet (323) (313) is arranged on one side surface of the shell, and a fluid outlet is arranged on the other side surface of the shell; a free floating disc (33) is arranged in the cavity, and the distance between the free floating disc (33) and the fluid inlet (323) (313) is adjusted according to the speed and the viscosity of the fluid;
wherein, when the fluid with high speed and low viscosity flows in, the distance between the free floating disc (33) and the fluid inlet (323) (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 (323) (313) is increased, and the inflow of the fluid is promoted.
10. The differential pressure type sliding sleeve with the water control function according to claim 9, wherein the housing comprises a first valve body (31) and a second valve body (32) which are oppositely arranged, 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 (323) (313) is provided on the first deck (311) and the fluid outlet is provided on the second deck (321).
11. The differential pressure type sliding sleeve with the water control function according to claim 10, wherein a support (324) is disposed on the second plate surface (321), and the support (324) supports the free floating disc (33) so that a certain distance is provided between the free floating disc (33) and the second plate surface (321).
12. The differential pressure type sliding sleeve with the water control function according to claim 11, wherein the fluid inlet (323) (313) is arranged at the center of the first plate surface (311), and the fluid outlet is arranged at the outer ring of the support (324) on the second plate surface (321).
13. The differential pressure type sliding sleeve with the water control function according to claim 12, wherein an inner side surface of the first side (312) is sleeved with an outer side surface of the second side (322), and a sealing member (214) for sealing the first side (312) and the second side (322) is disposed on the inner side surface of the first side (312).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010371694.5A CN113622868A (en) | 2020-05-06 | 2020-05-06 | Differential pressure type sliding sleeve with water control function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010371694.5A CN113622868A (en) | 2020-05-06 | 2020-05-06 | Differential pressure type sliding sleeve with water control function |
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| CN113622868A true CN113622868A (en) | 2021-11-09 |
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| CN202010371694.5A Pending CN113622868A (en) | 2020-05-06 | 2020-05-06 | Differential pressure type sliding sleeve with water control function |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20015805D0 (en) * | 2000-11-29 | 2001-11-28 | Schlumberger Technology Bv | Flow driven valve |
| WO2012037645A1 (en) * | 2010-09-22 | 2012-03-29 | Packers Plus Energy Services Inc. | Wellbore frac tool with inflow control |
| CN105569606A (en) * | 2014-10-11 | 2016-05-11 | 中国石油化工股份有限公司 | Switchable pressure differential sliding sleeve |
| WO2017045131A1 (en) * | 2015-09-15 | 2017-03-23 | 思达斯易能源技术(集团)有限公司 | Water control tubular column and automatic inflow control restrictor thereof, and inflow control device |
| CN108240206A (en) * | 2018-01-08 | 2018-07-03 | 北京合力奇点科技有限公司 | Switchable tune flow control water installations and its control water completion flow string |
| CN108397181A (en) * | 2018-04-08 | 2018-08-14 | 中国石油化工股份有限公司 | A kind of pressure break and the Joint Implementation tubing string and method of the aquatic production of control |
| CN108798610A (en) * | 2018-05-29 | 2018-11-13 | 中国海洋石油集团有限公司 | A kind of sleeve type Fillable Water Control Sieve |
| CN108843801A (en) * | 2018-07-05 | 2018-11-20 | 中国海洋石油集团有限公司 | A kind of float-type water control valve |
| CN109138917A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | It is a kind of to set sliding sleeve and the fracturing string comprising it |
-
2020
- 2020-05-06 CN CN202010371694.5A patent/CN113622868A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20015805D0 (en) * | 2000-11-29 | 2001-11-28 | Schlumberger Technology Bv | Flow driven valve |
| WO2012037645A1 (en) * | 2010-09-22 | 2012-03-29 | Packers Plus Energy Services Inc. | Wellbore frac tool with inflow control |
| CN105569606A (en) * | 2014-10-11 | 2016-05-11 | 中国石油化工股份有限公司 | Switchable pressure differential sliding sleeve |
| WO2017045131A1 (en) * | 2015-09-15 | 2017-03-23 | 思达斯易能源技术(集团)有限公司 | Water control tubular column and automatic inflow control restrictor thereof, and inflow control device |
| CN109138917A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | It is a kind of to set sliding sleeve and the fracturing string comprising it |
| CN108240206A (en) * | 2018-01-08 | 2018-07-03 | 北京合力奇点科技有限公司 | Switchable tune flow control water installations and its control water completion flow string |
| CN108397181A (en) * | 2018-04-08 | 2018-08-14 | 中国石油化工股份有限公司 | A kind of pressure break and the Joint Implementation tubing string and method of the aquatic production of control |
| CN108798610A (en) * | 2018-05-29 | 2018-11-13 | 中国海洋石油集团有限公司 | A kind of sleeve type Fillable Water Control Sieve |
| CN108843801A (en) * | 2018-07-05 | 2018-11-20 | 中国海洋石油集团有限公司 | A kind of float-type water control valve |
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