CN110130865B - Push-pull switch assembly capable of eliminating system flexibility - Google Patents
Push-pull switch assembly capable of eliminating system flexibility Download PDFInfo
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- CN110130865B CN110130865B CN201910489549.4A CN201910489549A CN110130865B CN 110130865 B CN110130865 B CN 110130865B CN 201910489549 A CN201910489549 A CN 201910489549A CN 110130865 B CN110130865 B CN 110130865B
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- pull
- water channel
- valve core
- pull switch
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 32
- 230000000694 effects Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 description 18
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The push-pull switch assembly comprises a push-pull valve core and a push-pull switch, wherein the push-pull valve core can be mutually matched with the push-pull switch sleeved on the outer side of the push-pull valve core in a tight manner, and the push-pull valve core can move relative to the push-pull switch along the axial direction; the central water channel of the push-pull valve core is arranged in the middle of the push-pull valve core along the axial direction; through the movement of the push-pull valve core in the push-pull switch, the switching communication between the central water channel of the push-pull valve core and at least two different water channel interfaces arranged on the push-pull switch can be realized; when the push-pull valve core moves to a specific position inside the push-pull switch, the central water channel of the push-pull valve core can be sealed and is not communicated with any water channel on the push-pull switch. The push-pull switch assembly reduces errors caused by flexibility of high-pressure water in the hydraulic fracturing measuring device in the measuring process by improving the push-pull switch water channel, can remarkably improve measuring precision, can provide needed measuring water pressure for the hydraulic fracturing measuring device in the fracturing process through different forms, and improves reliability of measuring results.
Description
Technical Field
The present invention relates to a push-pull switch assembly, and more particularly, to a push-pull switch assembly for use in a hydraulic fracturing measurement apparatus that eliminates system compliance.
Background
The hydraulic fracturing method is a ground stress measuring method, and the equipment used for measurement is a hydraulic fracturing measuring device. During measurement, the bedrock is drilled first, and then the upper end and the lower end of the corresponding fracturing section are sealed by using an upper packer and a lower packer. Pressurized fluid is then injected until the formation fractures and the pressure changes over time are recorded, enabling calculation of the condition of the earth's stress. With the development of technology, it is desired to know more about the fracture azimuth and other conditions so as to obtain the state of ground stress more accurately, so that a stamping system or a downhole television is used to observe the fracture conditions. And after observation, calculating the size and direction of the stress by using a corresponding formula according to the recorded measured parameters such as the fracture pressure, the off-pump pressure and the like and the fracture information such as the fracture azimuth and the like.
Compliance is a concept of mechanics, which refers to the amount of deformation of a member in the vertical axial direction under an axial force, and the compliance of water, i.e., the amount of deformation in a particular direction when water is squeezed, reflects the change that water refers to. Because the high-pressure water in the water channel is acted by the force inside the hydraulic fracturing measuring device, when hydraulic fracturing is realized through the fracturing section and the water pressure in the fracturing section is measured, the flexibility of the high-pressure water can cause instability of a pressure measuring result, for example, the critical parameter of obtaining the ground stress measuring value, such as the stress value when the stress is heavy, cannot accurately represent the pressure value when the real fracture is heavy. In addition, in the prior art, when the water pressure in the fracturing section is measured in the hydraulic fracturing process, a water channel in the measuring device is always connected with a high-pressure water source to continuously provide the required high-pressure water for the measuring device, however, because the water flow rate which can be provided by the high-pressure water source is relatively large, the water pressure is increased instantaneously in the measuring process, and accurate measurement in the fracturing process is difficult to realize. Therefore, in order to solve the problem that the test result is unreliable in the prior art, the hydraulic fracturing measuring device needs to be improved, and the accuracy of measurement is improved.
Disclosure of Invention
Aiming at the technical problems, the push-pull switch assembly increases the closed structure of the water channel in the push-pull valve core through improving the push-pull switch water channel so as to reduce the influence of the flexibility of water on the measurement result of the whole device; simultaneously, the water channel opening communicated with the fracturing water channel is further added on the push-pull switch, so that the push-pull switch can be communicated with the fracturing water channel through different water channel openings or different connection modes, and high-pressure water can be supplied to the fracturing water channel in different modes. In the whole effect, the push-pull switch assembly can reduce the error caused by the flexibility of high-pressure water in the hydraulic fracturing measuring device to the measurement in the measuring process through a relatively simple structure, and can remarkably improve the measuring precision; meanwhile, the required measured water pressure can be provided in different forms in the fracturing process of the hydraulic fracturing measuring device, and the accuracy and reliability of the measuring result are further improved.
The push-pull switch assembly comprises a push-pull valve core and a push-pull switch, wherein the push-pull valve core can be tightly matched with the push-pull switch sleeved on the outer side of the push-pull valve core, and the push-pull valve core can move relative to the push-pull switch along the axial direction; the central water channel of the push-pull valve core is arranged in the middle of the push-pull valve core along the axial direction; through the movement of the push-pull valve core in the push-pull switch, the switching communication between the central water channel of the push-pull valve core and at least two different water channel interfaces arranged on the push-pull switch can be realized; when the push-pull valve core moves to a specific position inside the push-pull switch, the central water channel of the push-pull valve core can be sealed and is not communicated with any water channel on the push-pull switch.
Preferably, the push-pull valve core is further provided with at least one push-pull valve core transverse water channel, one end of the push-pull valve core transverse water channel is communicated with the central water channel of the push-pull valve core, and the other end of the push-pull valve core transverse water channel is communicated with the outer side of the push-pull valve core through the outer side wall of the push-pull valve core; the push-pull valve core transverse water channel is used for realizing switching communication between the push-pull valve core central water channel and at least two different water channel interfaces arranged on the push-pull switch.
Preferably, at least two sets of sealing rings are arranged between the push-pull valve core and the push-pull switch, and when the push-pull valve core transverse water channel moves between the at least two sets of sealing rings, the push-pull valve core transverse water channel is sealed by the at least two sets of sealing rings, so that the push-pull valve core central water channel can be sealed and is not communicated with any water channel on the push-pull switch.
Preferably, a transfer side water channel is formed on the side wall of the push-pull switch, the transfer side water channel is provided with at least one transfer side water channel connector, one end of the transfer side water channel connector is communicated with the transfer side water channel, and the other end of the transfer side water channel connector penetrates out of the inner wall of the push-pull switch and can be communicated with the transverse water channel of the push-pull valve core.
Preferably, two transfer side water channel interfaces are formed on the side wall of the push-pull switch, and the two transfer side water channel interfaces are arranged on the side wall of the push-pull switch at intervals; the interface positioned at the upper side is an upper interface of the switching side water channel, and the interface positioned at the lower side is a lower interface of the switching side water channel.
Preferably, the upper connector of the transfer side water channel is positioned at the upper sides of the sealing rings of the at least two groups of intervals, and the lower connector of the transfer side water channel is positioned at the lower sides of the sealing rings of the at least two groups of intervals.
Preferably, the internal diameter of the lower connector of the transfer side water channel is smaller than the internal diameter of the upper connector of the transfer side water channel.
Preferably, the internal diameter of the transfer side water passage sewer is set to be such that the water pressure in the fracturing water passage communicating with the transfer side water passage can only be increased or decreased in a slowly changing manner when the push-pull valve core transverse water passage communicates with the transfer side water passage sewer.
Preferably, a plug is arranged at the bottom opening position of the central water channel of the push-pull valve core, and the plug can be detachably connected to the bottom opening position and is used for detachably sealing the bottom opening.
Preferably, the push-pull switch is composed of an upper part of the push-pull switch, a middle part of the push-pull switch and a lower part of the push-pull switch; the side wall of the middle part of the push-pull switch is internally provided with at least one push-pull switch middle side water channel arranged along the axial direction, and the upper end of the push-pull switch middle side water channel is provided with a push-pull switch middle side water channel connector so that the push-pull switch middle side water channel can be communicated with the push-pull valve core transverse water channel; at least one transfer side water channel is arranged in the side wall of the lower part of the push-pull switch along the axial direction; when the push-pull valve core and the push-pull switch relatively move, the transverse water channel of the push-pull valve core is respectively communicated with one water channel interface of the middle side water channel interface or the switching side water channel interface of the push-pull switch, and other water channel interfaces in the push-pull switch are sealed at the same time.
Preferably, the inner wall in the middle of the push-pull switch is further provided with at least one water drain channel connector which is transversely arranged, the water drain channel connector is connected with the water drain channel and penetrates through the side wall in the middle of the push-pull switch, the water drain channel connector can enable the water drain channel to be communicated with the transverse water channel of the push-pull valve core, and the other end of the water drain channel penetrates out from the side wall in the middle of the push-pull switch.
Preferably, the water drain channel is located near an opening position on the outer wall of the middle of the push-pull switch, and a filtering device is arranged for preventing sediment outside the opening from entering the water drain channel.
Preferably, the filtering device is an annular structure, at least one water draining hole is arranged on the surface of the annular structure, and a filtering component is arranged in the water draining hole.
Preferably, when the push-pull valve core and the push-pull switch relatively move, the transverse water channel of the push-pull valve core is respectively communicated with one of the middle water channel interface, the drainage water channel interface, the switching side water channel upper interface or the switching side water channel lower interface of the push-pull switch, and other water channel interfaces in the push-pull switch are closed at the same time.
Preferably, a separation beam is arranged in the lower part of the push-pull switch, and the separation beam divides a cavity in the lower part of the push-pull switch into an upper part and a lower part; wherein the upper part of the cavity is used for accommodating the sliding valve core to slide in the lower part of the push-pull switch; the lower portion of the cavity forms a recess for receiving and connecting with other components.
Preferably, the transfer side water channel is capable of communicating with the inside of the groove.
Preferably, at least one push-pull switch lower side water channel arranged along the axial direction is formed in the side wall of the push-pull switch lower part, and the push-pull switch lower side water channel can be communicated with the push-pull switch middle side water channel.
Preferably, the upper part of the push-pull switch, the middle part of the push-pull switch and the lower part of the push-pull switch can be detachably and hermetically connected.
Preferably, the transfer side water channel is communicated with a fracturing water channel, and the fracturing water channel is used for realizing the hydraulic fracturing effect.
Preferably, the lower side waterway of the push-pull switch is in communication with a set waterway for inflating the surface of the packer or the impression module.
Compared with the prior art, the invention has the beneficial effects that: through the improvement to the push-pull switch water channel, the error caused by the flexibility of high-pressure water in the hydraulic fracturing measuring device is reduced in the measuring process, and the measuring precision can be remarkably improved. Meanwhile, the required measured water pressure can be provided for the fracturing process of the hydraulic fracturing measuring device in different forms, and the accuracy and reliability of the measuring result are further improved.
Drawings
FIG. 1: the push-pull switch assembly is in a sealed state.
Fig. 2: the push-pull switch assembly is in an integral structure schematic diagram in a connection measurement state.
Fig. 3: part A is a schematic structural diagram.
Fig. 4: part B is a schematic structural diagram.
Fig. 5: and C part of the structure schematic diagram.
Fig. 6: and D part of the structure schematic diagram.
Detailed Description
The push-pull switch assembly according to this embodiment is shown in fig. 1 to 6, for convenience of description below, according to the push-pull switch assembly being in a closed state and a connection measurement state, for convenience of embodying details, the push-pull switch assembly in the closed state is divided into two portions AB in the drawings, and the push-pull switch assembly in the connection measurement state is divided into two portions CD, and described in detail below.
The push-pull switch assembly 1 according to the present embodiment includes a push-pull valve core 1100 and a push-pull switch 1200, wherein the push-pull valve core 1100 can be tightly matched with the push-pull switch 1200 sleeved on the outer side of the push-pull valve core 1100, and the push-pull valve core 1100 can relatively move with the push-pull switch 1200 along the axial direction; the central water channel 1101 of the push-pull valve core is arranged in the middle of the push-pull valve core 1100 along the axial direction; through the movement of the push-pull valve core 1100 in the push-pull switch 1200, the switching communication between the central water channel 1101 of the push-pull valve core and at least two different water channel interfaces arranged on the push-pull switch 1200 can be realized; when the push-pull valve core 1100 moves to a certain position inside the push-pull switch 1200, the push-pull valve core central waterway 1101 can be sealed and does not communicate with any waterway on the push-pull switch.
Therefore, the high-pressure water inside the central water channel 1101 of the push-pull valve core can be completely isolated from a downstream water channel, so that the flexibility of the central water channel 1101 of the push-pull valve core and the high-pressure water at the upstream can be prevented from influencing the measurement result of the water pressure in the fracturing water channel of the hydraulic fracturing measurement device, and the accuracy of the measurement result of the fracturing section is improved.
As shown in fig. 3-6, the push-pull valve core 1100 is further provided with at least one push-pull valve core transverse water channel 1102, one end of the push-pull valve core transverse water channel 1102 is communicated with the push-pull valve core central water channel 1101, and the other end of the push-pull valve core transverse water channel 1102 is communicated with the outer side of the push-pull valve core 1100 through the outer side wall of the push-pull valve core 1100; the push-pull valve core transverse water channel 1102 is used for realizing switching communication between the push-pull valve core central water channel 1101 and at least two different water channel interfaces arranged on the push-pull switch 1200.
When the push-pull valve core 1100 moves in the axial direction inside the push-pull switch 1200, the push-pull valve core transverse waterway 1102 can be selectively and uniquely connected with each waterway interface formed on the side wall of the push-pull switch 1200; that is, with the movement of the push-pull valve core 1100, the push-pull valve core transverse waterway 1102 can be communicated with one of the waterway interfaces, and simultaneously can be mutually closed and not communicated with other waterway interfaces. Preferably, the push-pull valve core 1100 and the push-pull switch 1200 can be tightly matched with each other.
Further, at least two sets of sealing rings are disposed between the push-pull valve core 1100 and the push-pull switch 1200, as shown in fig. 4, when the push-pull valve core transverse water channel 1102 moves between two sets of first sealing rings 1207 disposed at intervals, the push-pull valve core transverse water channel 1102 is sealed by the first sealing rings 1207. At this time, when the high-pressure water from the central water passage 1101 of the push-pull valve core is discharged from the lateral water passage 1102 of the push-pull valve core to the outside of the push-pull valve core 1100, both the upper and lower sides are sealed by the first seal rings 1207. The central water channel 1101 of the push-pull valve core is sealed, and high-pressure water in the central water channel 1101 of the push-pull valve core cannot be communicated with any other water channel through the transverse water channel 1102 of the push-pull valve core, namely the central water channel 1101 of the push-pull valve core cannot be communicated with any water channel on the push-pull switch. Preferably, the first sealing ring 1207 is disposed on an inner side wall of the push-pull switch 1200, and is capable of moving relative to the push-pull valve element 1100, and is capable of sealing a gap between the push-pull valve element 1100 and the push-pull switch 1200.
At this time, by the above arrangement among the first sealing ring 1207, the push-pull valve core 1100 and the push-pull switch 1200, the high-pressure water in the central water channel 1101 of the push-pull valve core, which is communicated with the high-pressure water source, and the high-pressure water in the upstream water channel which is communicated with the central water channel 1101 of the push-pull valve core are isolated from the downstream water channel, so as to eliminate the influence of the flexibility of the high-pressure water in the central water channel 1101 of the push-pull valve core and the upstream water channel thereof on the downstream water channel measurement result.
A transfer side water channel 1204 is formed on the side wall of the push-pull switch 1200, and the transfer side water channel 1204 has a transfer side water channel upper connector 1205 and a transfer side water channel lower connector 1206. The transfer side water channel upper port 1205 is penetrated from the inner wall positioned at the upper sides of the two groups of first sealing rings 1207, the transfer side water channel lower port 1206 is penetrated from the inner wall positioned at the lower sides of the two groups of first sealing rings 1207, and when the push-pull valve core 1100 moves relatively to the push-pull switch 1200 along the axial direction, the push-pull valve core transverse water channel 1102 can be respectively communicated with the transfer side water channel upper port 1205 or the transfer side water channel lower port 1206. Preferably, a second sealing ring 1214 is provided on the inner wall of the upper side of the adaptor-side water channel upper port 1205; a third sealing ring 1215 is disposed at the inner wall of the lower side of the transfer-side sewer lower port 1206. The second seal ring 1214 and the third seal ring 1215 are used to seal a gap between the push-pull valve core 1100 and the inner wall of the push-pull switch 1200, so as to ensure that the push-pull valve core transverse water channel 1102 can be separately communicated with one of the switching side water channel upper connector 1205 or the switching side water channel lower connector 1206.
Further preferably, referring to fig. 4 and 6, the adapting side water channel 1204 is disposed on a side wall of the push-pull switch 1200 along a parallel axis direction, and a lower end of the adapting side water channel 1204 can be communicated with a downstream fracturing water channel, where the downstream fracturing water channel is used for pressing a downhole rock wall at a position to be tested through a fracturing section, so as to realize a hydraulic fracturing effect. Preferably, the lower end of the transfer side water channel 1204 is communicated with an upper packer central water channel 201 of the upper packer 2, and the upper packer central water channel 201 is arranged in an upper packer central rod 202 of the upper packer 2 along a central axis. Therefore, the transfer side water channel 1204 can be communicated with an internal water channel of a downstream fracturing section, and is used for realizing a hydraulic fracturing effect on a downhole position to be tested through the fracturing section.
In some embodiments, the internal diameter of the adaptor-side waterway lower hub 1206 is less than the internal diameter of the adaptor-side waterway upper hub 1205. Thus, the push-pull switch assembly 1 can realize the connection of the central water channel 1101 of the push-pull valve core and the internal water channel of the fracturing section in different modes through the upper water channel interface 1205 and the lower water channel interface 1206 of the switching side with different inner diameters. When measuring the underground position to be measured, the push-pull valve core transverse water channel 1102 is preferably communicated with the switching side water channel sewer joint 1206 so as to provide high-pressure water for the fracturing section through relatively small water quantity, thereby realizing slow increase of the water pressure measurement value of the underground position to be measured so as to obtain accurate result of the underground position to be measured rock wall information.
In some embodiments, the central water channel 1101 of the push-pull valve core penetrates through two ends of the push-pull valve core 1100 along a central axis thereof, and a plug 1103 is disposed at a bottom opening position of the central water channel 1101 of the push-pull valve core, and the plug 1103 can be detachably connected to the bottom opening position for detachably sealing the bottom opening. Preferably, the plug 1103 is connected with the bottom interface of the central water channel 1101 of the push-pull valve core through a threaded structure. The plug 1103 is preferably a screw that can be sealingly connected to each other by threads on the inside of the bottom opening to seal the bottom opening.
Because the hydraulic fracturing measuring device is used for measuring the property of the rock wall underground, sediment is easy to accumulate in the central water channel 1101 of the push-pull valve core, and if the accumulated sediment is too much, the normal use of the hydraulic fracturing measuring device is affected. The plug 1103 can detachably seal the bottom opening of the central water channel 1101 of the push-pull valve core, and when the plug 1103 is removed, openings are formed at two ends of the central water channel 1101 of the push-pull valve core, so that the central water channel 1101 of the push-pull valve core is convenient to clean.
The specific structure of this embodiment is that, as shown in fig. 3 and 5, the hydraulic fracturing measuring device has an upper joint 3, the upper joint 3 has an upper opening 301, and the upper opening 301 is used for connecting with a high-pressure water source. Preferably, the connection between the upper opening 301 and the high pressure water source is provided by a drill pipe or well rod. The middle part of the inside of the upper joint 3 is provided with an upper joint central water channel 302 along the axial direction, and one end of the upper joint central water channel 302 is communicated with the opening 301. The upper connector 3 can be connected with the upper end of the push-pull valve core 1100 through a threaded structure, when the upper connector 3 is connected with the push-pull valve core 1100, the other end of the upper connector 3 can be communicated with the push-pull valve core central water channel 1101, and the push-pull valve core central water channel 1101 penetrates through the two ends of the push-pull valve core 1100 along the central axis thereof.
As shown in fig. 3-6, a push-pull switch 1200 is sleeved on the outer side of the push-pull valve core 1100, and the push-pull switch 1200 is in a cylindrical sleeve-shaped structure as a whole and has an inner cavity capable of accommodating the push-pull valve core 1100. The outer side wall of the push-pull valve core 1100 can be tightly matched with the inner side wall of the push-pull switch 1200, and the push-pull valve core 1100 can move relative to the push-pull switch 1200 along the axial direction.
The push-pull switch 1200 includes a push-pull upper portion 1201, a push-pull middle portion 1202, and a push-pull lower portion 1203. The upper end of the upper part 1201 of the push-pull switch is provided with a limiting flange 1208 protruding inwards, and the inner diameter of the limiting flange 1208 is slightly smaller than the outer diameter of the limiting boss 1104 on the outer wall of the push-pull valve core 1100. Therefore, when the push-pull valve core 1100 is pulled up relative to the push-pull switch 1200, the limit flange 1208 can abut against the limit boss 1104 on the outer wall of the push-pull valve core 1100, so as to limit the maximum pulled-out positions of the push-pull switch 1200 and the push-pull valve core 1100.
The inner side wall near the lower end of the upper part 1201 of the push-pull switch is provided with threads for being meshed with threads on the outer side wall near the upper end of the middle part 1202 of the push-pull switch, so as to realize the fixed connection between the upper part 1201 of the push-pull switch and the middle part 1202 of the push-pull switch. A ring of transverse platform 1209 is formed on the inner wall of the upper part 1201 of the push-pull switch at the position above the screw thread. When the push-pull switch middle part 1202 and the push-pull switch upper part 1201 are locked by the engaged threads, an axisymmetric annular space can be formed between the lateral platform 1209 of the push-pull switch upper part 1201 and the upper side end surface 1210 of the push-pull switch middle part 1202, and the annular space forms a push-pull switch upper annular water channel 1211. The upper part 1201 of the push-pull switch is provided with an annular groove 1212 on the inner side wall near the annular water channel 1211 of the upper part of the push-pull switch, the middle part 1202 of the push-pull switch is provided with an annular groove 1213 on the inner side wall near the annular water channel 1211 of the upper part of the push-pull switch, the annular grooves 1212 and 1213 form a middle side water channel interface of the push-pull switch, which is used for enlarging the water channel area corresponding to the transverse water channel 1102 of the push-pull valve core so as to improve the fault tolerance space when the transverse water channel 1102 of the push-pull valve core and the annular water channel 1211 are mutually communicated, and the push-pull valve core 1100 is conveniently pushed and pulled so as to realize the communication between the transverse water channel 1102 of the push-pull valve core and the annular water channel 1211. At least one group of fourth sealing rings 1216 are arranged between the push-pull valve core 1100 and the push-pull switch upper part 1201 at the upper side of the annular groove 1212; at least one group of fifth sealing rings 1217 is disposed between the push-pull valve core 1100 and the push-pull switch middle 1202 below the annular groove 1213.
The whole push-pull switch middle 1202 is in a cylindrical sleeve-shaped structure, at least one push-pull switch middle side water channel 1218 penetrating along the axial direction is formed in the side wall of the push-pull switch middle 1202, an upper end opening of the push-pull switch middle side water channel 1218 is communicated with the push-pull switch upper annular water channel 1211, and a lower end opening of the push-pull switch middle side water channel 1218 is communicated with a push-pull switch lower annular water channel 1219 formed between the push-pull switch middle 1202 and the push-pull switch lower 1203. At least one water drain channel 1220 is formed near the side wall middle of the push-pull switch middle 1202, and the water drain channel 1220 is not communicated with the push-pull switch middle side water channel 1218. The water drain channel 1220 transversely penetrates through the side wall of the middle part 1202 of the push-pull switch, a water drain channel connector is formed at an opening at one side of the inner wall of the middle part 1202 of the push-pull switch, the water drain channel connector can enable the water drain channel to be communicated with the transverse water channel of the push-pull valve core, and the other end of the water drain channel 1220 is communicated with the outside of the middle part of the push-pull switch. When the push-pull valve core 1100 moves to the state that the push-pull valve core transverse water channel 1102 is communicated with the water drain water channel 1220, water in the push-pull valve core central water channel 1101 can be discharged outwards from the water drain water channel 1220. The fifth sealing ring 1217 is disposed at the inner wall of the middle part 1202 of the push-pull switch on the upper side of the drain water channel 1220, and the second sealing ring 1214 is disposed at the inner wall of the middle part 1202 of the push-pull switch on the lower side of the drain water channel 1220.
Preferably, the drain water channel 1220 is located near the opening position on the outer wall of the middle 1202 of the push-pull switch, and a filtering device 1221 is provided. The filter 1221 is preferably an annular structure, and a plurality of drain holes 1222 are provided on a surface of the annular structure, and a filter element is provided in the drain holes 1222.
Threads are arranged on the outer walls of the two ends of the middle part 1202 of the push-pull switch, the threads at the upper end of the middle part 1202 of the push-pull switch are used for being connected with the threads on the inner wall of the lower end part of the upper part 1201 of the push-pull switch, and a sealing ring is arranged near the threaded connection position of the middle part 1202 of the push-pull switch and the upper part 1201 of the push-pull switch; the screw thread at the lower end of the push-pull switch middle part 1202 is used for being connected with the screw thread on the inner wall of the upper end part of the push-pull switch lower part 1203, and a sealing ring is arranged near the screw thread connection position of the push-pull switch middle part 1202 and the push-pull switch lower part 1203.
A push-pull lower side water passage 1223 is formed in the side wall of the push-pull lower portion 1203, and the push-pull lower side water passage 1223 extends in the parallel axis direction in the side wall of the push-pull lower portion 1203. The push-pull lower side waterway 1223 can communicate with a downstream set waterway for inflating the surface of the packer or the impression module. Preferably, the upper end of the lower side water passage 1223 of the push-pull switch is communicated with the lower annular water passage 1219 of the push-pull switch, and the lower end is communicated with the inner water passage 203 of the upper packer for expanding the surface layer of the upper packer 2.
Referring to fig. 4 and 6, a separation beam 1224 is disposed in the lower portion 1203 of the push-pull switch, and the separation beam 1224 separates the cavity in the lower portion 1203 of the push-pull switch into an upper portion and a lower portion. Wherein, the upper part of the cavity is used for accommodating the push-pull valve core 1100 to slide in the lower part 1203 of the push-pull switch, and the lower part of the cavity forms a groove which is used for accommodating and connecting with other components. Preferably, the recess is intended to be connected to an upper packer 2.
Referring to fig. 3-6, when the push-pull valve core 1100 slides in the push-pull switch 1200 until the push-pull valve core transverse water channel 1102 is communicated with the push-pull switch upper annular water channel 1211, high pressure water from the high pressure water source flows through the push-pull valve core transverse water channel 1102 sequentially from the upper joint central water channel 302 and the push-pull valve core central water channel 1101, and further enters the seat sealing water channel through the push-pull switch upper annular water channel 1211, the push-pull switch middle side water channel 1218 and the push-pull switch lower side water channel 1223, so as to expand the surface layer of the packer or the die assembly due to the pressure of the high pressure water. At this time, the push-pull valve core 1100 and the sealing rings provided between the outer wall of the push-pull valve core 1100 and the inner wall of the push-pull switch 1200 ensure that the interfaces of other water channels are all in a closed state, i.e. that the other water channels are all in a closed state.
Referring to fig. 3-6, when the push-pull valve core 1100 slides within the push-pull switch 1200 until the push-pull valve core lateral waterway 1102 communicates with the drain waterway 1220, water located within the upper joint center waterway 302, push-pull valve core center waterway 1101, will drain to the outside of the hydraulic fracturing measuring device through the drain waterway 1220 and drain holes 1222 to drain excess water inside the device.
When the push-pull valve core 1100 slides in the push-pull switch 1200 until the push-pull valve core transverse water channel 1102 is communicated with the switching side water channel upper interface 1205, high-pressure water from the high-pressure water source sequentially flows through the push-pull valve core transverse water channel 1102 and the switching side water channel upper interface 1205 into the fracturing water channel through the upper joint central water channel 302 and the push-pull valve core central water channel 1101. The high-pressure water passes through the fracturing section and is discharged to the outside, and is injected into the space to be tested outside the fracturing section, so that the hydraulic fracturing effect on surrounding rock walls is realized.
When the push-pull valve core 1100 slides in the push-pull switch 1200 to the spaced position between the two sets of first sealing rings 1207, that is, when the push-pull valve core 1100 moves to the position shown in fig. 3 and 4, both the upper and lower sides of the push-pull valve core transverse water channel 1102 are sealed by the two sets of first sealing rings 1207, so that the high-pressure water in the push-pull valve core central water channel 1101 cannot be discharged to the outside, that is, the high-pressure water in the joint central water channel 302 and the push-pull valve core central water channel 1101 is sealed in the water channels. Therefore, the high-pressure water in the internal water channel of the push-pull switch 1 and the upstream water channel and the downstream water channel are separated by the two groups of first sealing rings 1207, and the flexibility of the high-pressure water in the internal water channel of the push-pull switch 1 and the upstream water channel can not influence the water pressure in the downstream fracturing water channel. If the water pressure in the fracturing water channel is measured at this time, the influence of high-pressure water flexibility in an upstream water channel can be avoided, and a relatively accurate measurement result can be obtained.
When the push-pull valve core transverse water channel 1102 is communicated with the switching side water channel lower connector 1206, high-pressure water from the high-pressure water source sequentially flows through the push-pull valve core transverse water channel 1102 and the switching side water channel lower connector 1206 through the upper connector central water channel 302 and the push-pull valve core central water channel 1101, and can enter the fracturing water channel again. The high-pressure water can pass through the fracturing segment again and is discharged to the outside, and is injected into the space to be measured outside the fracturing segment. Preferably, the inner diameter of the transfer side water channel lower connector 1206 is smaller than the inner diameter of the transfer side water channel upper connector 1205, so that when the push-pull valve core transverse water channel 1102 is communicated with the transfer side water channel lower connector 1206, the water pressure in the fracturing water channel slowly rises, and the accuracy and reliability of the measurement result of the whole measurement process can be improved.
In summary, the invention increases the closed structure of the water channel in the push-pull valve core through improving the water channel in the push-pull switch so as to reduce the influence of the flexibility of the water in the whole device on the measurement result; simultaneously, the water channel opening communicated with the fracturing water channel is further added on the push-pull switch, so that the push-pull switch can be communicated with the fracturing water channel through different water channel openings or different connection modes, and high-pressure water can be supplied to the fracturing water channel in different modes. Overall, the push-pull switch assembly can reduce the error caused by the flexibility of high-pressure water in the hydraulic fracturing measuring device in the measuring process through a relatively simple structure, can remarkably improve the measuring precision, can provide required measuring water pressure in the fracturing process of the hydraulic fracturing measuring device in different forms, and improves the accuracy and reliability of the measuring result.
The foregoing description is only illustrative of some embodiments of the invention, and since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and application shown and described, and accordingly, all modifications and equivalents may be resorted to, falling within the scope of the invention as defined by the appended claims.
Claims (17)
1. The push-pull switch assembly comprises a push-pull valve core and a push-pull switch, wherein the push-pull valve core can be mutually matched with the push-pull switch sleeved on the outer side of the push-pull valve core in a tight manner, and the push-pull valve core can move relative to the push-pull switch along the axial direction; the central water channel of the push-pull valve core is arranged in the middle of the push-pull valve core along the axial direction; through the movement of the push-pull valve core in the push-pull switch, the switching communication between the central water channel of the push-pull valve core and at least two different water channel interfaces arranged on the push-pull switch can be realized; when the push-pull valve core moves to a certain specific position in the push-pull switch, the central water channel of the push-pull valve core can be sealed and is not communicated with any water channel on the push-pull switch;
the push-pull valve core is also provided with at least one push-pull valve core transverse water channel, one end of the push-pull valve core transverse water channel is communicated with the central water channel of the push-pull valve core, and the other end of the push-pull valve core transverse water channel is communicated with the outer side of the push-pull valve core through the outer side wall of the push-pull valve core; the push-pull valve core transverse water channel is used for realizing the switching communication between the central water channel of the push-pull valve core and at least two different water channel interfaces arranged on the push-pull switch;
at least two groups of sealing rings are arranged between the push-pull valve core and the push-pull switch, and when the push-pull valve core transverse water channel moves between the at least two groups of sealing rings, the push-pull valve core transverse water channel is sealed by the at least two groups of sealing rings, so that the central water channel of the push-pull valve core can be sealed and is not communicated with any water channel on the push-pull switch;
the side wall of the push-pull switch is provided with a transfer side water channel, the transfer side water channel is provided with at least one transfer side water channel connector, one end of the transfer side water channel connector is communicated with the transfer side water channel, and the other end of the transfer side water channel connector penetrates out of the inner wall of the push-pull switch and can be communicated with the transverse water channel of the push-pull valve core.
2. The push-pull switch assembly of claim 1 wherein two of said transfer side waterway interfaces are formed in a side wall of said push-pull switch and said two transfer side waterway interfaces are spaced apart on a side wall of said push-pull switch; the interface positioned at the upper side is an upper interface of the switching side water channel, and the interface positioned at the lower side is a lower interface of the switching side water channel.
3. The push-pull switch assembly of claim 2 wherein said transfer side waterway upper interface is positioned above said at least two sets of spaced apart seal rings and said transfer side waterway lower interface is positioned below said at least two sets of spaced apart seal rings.
4. The push-pull switch assembly of claim 2 wherein the internal diameter of the transfer side waterway lower interface is less than the internal diameter of the transfer side waterway upper interface.
5. The push-pull switch assembly of claim 4 wherein the internal diameter of the transfer side waterway lower interface is sized such that when the push-pull spool lateral waterway is in communication with the transfer side waterway lower interface, the water pressure within the frac waterway in communication with the transfer side waterway can only increase or decrease in a slowly varying manner.
6. The push-pull switch assembly of claim 1 wherein a plug is provided at a bottom opening location of the push-pull core central waterway, the plug being removably attachable to the bottom opening location for removably sealing the bottom opening.
7. The push-pull switch assembly of claim 1 wherein the push-pull switch is comprised of a push-pull switch upper portion, a push-pull switch middle portion, and a push-pull switch lower portion; the side wall of the middle part of the push-pull switch is internally provided with at least one push-pull switch middle side water channel arranged along the axial direction, and the upper end of the push-pull switch middle side water channel is provided with a push-pull switch middle side water channel connector so that the push-pull switch middle side water channel can be communicated with the push-pull valve core transverse water channel; at least one transfer side water channel is arranged in the side wall of the lower part of the push-pull switch along the axial direction; when the push-pull valve core and the push-pull switch relatively move, the transverse water channel of the push-pull valve core is respectively communicated with one water channel interface of the middle side water channel interface or the switching side water channel interface of the push-pull switch, and other water channel interfaces in the push-pull switch are sealed at the same time.
8. The push-pull switch assembly of claim 7 wherein the inner wall of the push-pull switch middle portion is further formed with at least one laterally disposed drain channel interface, the drain channel interface being connected to a drain channel and extending through the side wall of the push-pull switch middle portion, the drain channel interface being capable of enabling the drain channel to communicate with the push-pull valve core lateral channel, the other end of the drain channel extending outwardly from the side wall of the push-pull switch middle portion.
9. The push-pull switch assembly of claim 8 wherein said spillway is positioned adjacent an opening in a central outer wall of said push-pull switch, and wherein a filter means is provided for preventing silt from outside said opening from entering said spillway.
10. The push-pull switch assembly of claim 9 wherein the filter device is an annular structure having at least one drain hole disposed in a surface thereof, the drain hole having a filter member disposed therein.
11. The push-pull switch assembly of claim 8, wherein upon relative movement between the push-pull valve core and the push-pull switch, it is possible to achieve that the push-pull valve core lateral waterway communicates with one of the push-pull switch middle side waterway interface, the drain waterway interface, the transfer side waterway upper interface, or the transfer side waterway lower interface, respectively, while simultaneously closing the other waterway interfaces in the push-pull switch.
12. The push-pull switch assembly of claim 7 wherein the lower interior of the push-pull switch has a dividing beam dividing the cavity of the lower interior of the push-pull switch into upper and lower portions; wherein the upper part of the cavity is used for accommodating the sliding valve core to slide in the lower part of the push-pull switch; the lower portion of the cavity forms a recess for receiving and connecting with other components.
13. The push-pull switch assembly of claim 12 wherein said transfer side waterway is capable of communicating with an interior of said recess.
14. The push-pull switch assembly of claim 7, wherein at least one push-pull switch lower side channel disposed in an axial direction is further formed in the push-pull switch lower side wall, the push-pull switch lower side channel being capable of communicating with the push-pull switch middle side channel.
15. The push-pull switch assembly of claim 7 wherein the push-pull upper portion, the push-pull middle portion and the push-pull lower portion are removably sealingly connected.
16. The push-pull switch assembly of claim 1 wherein the transfer side waterway is in communication with a frac waterway, the frac waterway for effecting a hydraulic fracturing effect.
17. The push-pull switch assembly of claim 14 wherein the push-pull switch lower side waterway is in communication with a seat waterway for inflating a skin of the packer or the impression assembly.
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| CN201910489549.4A CN110130865B (en) | 2019-06-06 | 2019-06-06 | Push-pull switch assembly capable of eliminating system flexibility |
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| CN201910489549.4A CN110130865B (en) | 2019-06-06 | 2019-06-06 | Push-pull switch assembly capable of eliminating system flexibility |
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| CN111691851B (en) * | 2020-06-19 | 2021-04-09 | 中国地质科学院地质力学研究所 | Double-pipe high-pressure water channel conversion control device and stress measurement system |
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