CN111691851B

CN111691851B - Double-pipe high-pressure water channel conversion control device and stress measurement system

Info

Publication number: CN111691851B
Application number: CN202010570830.3A
Authority: CN
Inventors: 吴满路; 张士安; 张重远
Original assignee: INSTITUTE OF GEOMECHANICS CHINESE ACADEMY OF GEOLOGICAL SCIENCES
Current assignee: INSTITUTE OF GEOMECHANICS CHINESE ACADEMY OF GEOLOGICAL SCIENCES
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-04-09
Anticipated expiration: 2040-06-19
Also published as: CN111691851A

Abstract

The application provides a double-barrelled high pressure water route conversion controlling means and stress measurement system relates to ground stress measurement technical field. The control device comprises a valve core rod and a valve body, wherein the valve core rod is movably arranged in the valve body in a penetrating mode. The valve core rod moves relative to the valve body to enable the water outlet of the valve core rod to be communicated with the packer setting cavity or the water drainage port of the valve body. The valve body comprises a fracturing cavity, the inlet end of the fracturing cavity is communicated with the high-pressure rubber pipe, and the outlet end of the fracturing cavity is communicated with the fracturing cavity of the packer. The stress measuring system comprises a drill rod, a packer, a high-pressure rubber pipe and the control device. The drill rod is communicated with the valve core rod, and the valve body is communicated with the packer setting cavity. The inlet end is communicated with the high-pressure rubber pipe, and the outlet end is communicated with the packer fracturing cavity. The control device integrates the fracturing cavity into the valve body, and the high-pressure rubber pipe can be communicated with the fracturing cavity of the packer through being communicated with the fracturing cavity in the valve body, so that friction between the high-pressure rubber pipe and a rock wall is avoided. The high-pressure rubber pipe of the stress measurement system has long service life, and is accurate and reliable.

Description

Double-pipe high-pressure water channel conversion control device and stress measurement system

Technical Field

The application relates to the technical field of ground stress measurement, in particular to a double-pipe high-pressure water channel conversion control device and a stress measurement system.

Background

The existing double-pipe hydraulic fracturing ground stress measurement system utilizes a drill pipe sealing pipeline to seat and seal an underground packer, utilizes a high-pressure rubber pipe water path to fracture a packing section, and utilizes a water draining device installed at the lowest end of the drill pipe sealing pipeline to drain water after the completion of a fracturing test, so that the packer is unsealed. The water draining device occupies a larger radial space of the drill hole, and when the high-pressure rubber pipe and the water draining device are bound together in parallel to start a process of going into the well, the high-pressure rubber pipe is easy to extrude, collide and rub with rocks on the hole wall and the water draining device, so that the high-pressure rubber pipe is abraded and reduced in strength if the high-pressure rubber pipe is worn, and the high-pressure rubber pipe is broken by abrasion if the high-pressure rubber pipe is heavy, so that the measurement fails.

Disclosure of Invention

An object of the embodiment of the application is to provide a double-pipe high-pressure waterway conversion control device and a stress measurement system, which aim at improving the problem that a high-pressure rubber pipe is easy to wear with a rock wall in the related art.

The embodiment of the application provides a double-barrelled high pressure water route conversion controlling means, this double-barrelled high pressure water route conversion controlling means includes valve core pole and valve body, and the valve core pole is movably to wear to locate the valve body, and the valve core pole removes the delivery port that can make the valve core pole and packer seat seal chamber or communicate with the outlet of valve body for the valve body, and the valve body includes the fracturing chamber, and the entrance point in fracturing chamber is used for communicating with the high-pressure rubber pipe, and the exit end in fracturing chamber is used for communicating with packer fracturing chamber.

The valve body is movably arranged in a penetrating mode through the valve core rod, the position of the valve core rod is adjusted, and therefore the water outlet of the valve core rod is communicated with the packer setting cavity, and setting is achieved. Or the position of the valve core rod is adjusted, so that the water outlet of the valve core rod is communicated with the water drainage port of the valve body, and water drainage is realized. In addition, the high-pressure rubber pipe can be communicated with the fracturing cavity of the packer by communicating with the fracturing cavity, so that the high-pressure rubber pipe is prevented from being parallelly bound with the water drainage device, and the friction between the high-pressure rubber pipe and a rock wall is avoided. This double-barrelled high pressure water route conversion controlling means has integrateed the seat and has sealed the water route, the fracturing water route and sluiced the water route, has improved the integrated level of device greatly, has also improved measurement of efficiency and measurement success rate, has avoided the friction of high-pressure rubber pipe with the cliff.

As an optional technical scheme of this application embodiment, the valve body holds the chamber including setting chamber and case pole, sets the chamber and is used for setting the chamber intercommunication with the packer. The valve core rod accommodating cavity comprises a water draining section and a setting section, and the valve core rod is movably accommodated in the valve core rod accommodating cavity. When the water outlet of the valve core rod is positioned in the setting section, the water outlet is communicated with the setting cavity. When the water outlet is positioned on the water drainage section, the water outlet is communicated with a water drainage opening arranged on the wall of the water drainage section. The valve body is provided with a valve core rod accommodating cavity, so that the valve core rod can be movably accommodated in the valve core rod accommodating cavity. And adjusting the cavity section of the water outlet of the valve core rod in the valve core rod accommodating cavity, so that the water outlet of the valve core rod can be communicated with the setting cavity or the water drainage port.

As an optional technical scheme of this application embodiment, the valve body includes first valve body and second valve body, and first valve body and second valve body detachably connect. The valve core rod accommodating cavity is partially arranged on the first valve body, and the other part of the valve core rod accommodating cavity is arranged on the second valve body. The inlet end is arranged on the first valve body, and the outlet end is arranged on the second valve body. The water discharge section and the setting cavity are both arranged on the second valve body. By dividing the valve body into a first valve body and a second valve body, manufacturing and installation are facilitated.

As an optional technical scheme of the embodiment of the application, the first valve body is in threaded connection with the second valve body. The end face of the second valve body, which is close to the first valve body, is provided with a first sealing element, and the circumferential face of the second valve body, which is connected with the first valve body, is provided with a second sealing element. The first seal can prevent water from exiting the stem outlet from spilling into the fracturing chamber. The second seal can prevent water in the fracturing chamber from overflowing the valve body.

As an optional technical solution of the embodiment of the present application, the fracture cavity includes a first cavity section and a second cavity section. The first cavity section is arranged on the first valve body and communicated with the inlet end. The second cavity is opened in the second valve body, and the second cavity communicates the exit end. The end face of the first valve body, which is close to the second valve body, is provided with an annular groove, and the first cavity section is communicated with the second cavity section through the annular groove. Because first valve body and second valve body threaded connection, when connecting first valve body and second valve body, if do not set up the annular groove, then it is difficult to guarantee that first chamber section and second chamber section are aimed at. Through setting up the ring channel, then need not guarantee that first chamber section and second chamber section aim at, only need guarantee first chamber section and ring channel intercommunication, second chamber section and ring channel intercommunication can.

As an optional technical scheme of the embodiment of the application, the diameter of the water drainage section is larger than the outer diameter of the valve core rod. The diameter of the water drainage section is set to be larger than the outer diameter of the valve core rod, so that water drainage is facilitated.

As an optional technical scheme of the embodiment of the application, a third sealing piece and a fourth sealing piece are arranged between the valve core rod and the valve body. The setting section is located between third sealing member and fourth sealing member, and the fourth sealing member is located between the section of leaking water and the setting section. The setting section is positioned between the third sealing element and the fourth sealing element, and can prevent water from flowing out of the water outlet of the valve core rod from overflowing upwards or downwards. The fourth sealing member is located between the section of leaking out and the setting section, separates the section of leaking out and the setting section, prevents that the water in setting water route from leaking out to the water route of sluicing.

As an optional technical scheme of the embodiment of the application, the inlet end is arranged on the end face of the valve body. The inlet end is arranged on the end face of the valve body, so that the high-pressure rubber pipe can be prevented from passing through the periphery of the valve body and is directly connected to the packer, and the abrasion of the high-pressure rubber pipe is avoided as much as possible. Meanwhile, the integration level of the device is improved, and the measuring efficiency and the success rate are improved.

As an optional technical scheme of this application embodiment, the one end of valve body is provided with connecting thread, and connecting thread is used for being connected with the packer. The valve body is provided with the connecting thread, so that the valve body is conveniently in threaded connection with the packer, the use of metal pipe fittings is avoided, and the integration level of the double-pipe high-pressure water path conversion control device is improved.

The embodiment of the application further provides a stress measurement system, the stress measurement system comprises a drill rod, a packer, a high-pressure rubber pipe and a double-pipe high-pressure water path conversion control device in any one of the drill rod, the packer, the high-pressure rubber pipe and the double-pipe high-pressure water path conversion control device, the drill rod is communicated with the valve core rod, the valve body is communicated with the packer setting cavity, the inlet end is communicated with the high-pressure rubber pipe, and the outlet end is. The high-pressure rubber pipe of the stress measurement system can be communicated with the fracturing cavity of the packer through being communicated with the fracturing cavity of the double-pipe high-pressure waterway conversion control device, so that the high-pressure rubber pipe is prevented from being parallelly bound with the water drainage device, the friction between the high-pressure rubber pipe and a rock wall is avoided, and the high-pressure rubber pipe has a longer service life. Double-barrelled high pressure water route conversion controlling means has integrateed the seat and has sealed the water route, fracturing water route and sluicing water route, has higher integrated level, has also improved stress measurement system's measurement of efficiency and measurement success rate simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a double-pipe high-pressure waterway conversion control device provided in an embodiment of the present application in a setting state;

FIG. 2 is an enlarged view of position II in FIG. 1;

fig. 3 is a schematic structural view of the double-pipe high-pressure waterway conversion control device provided in the embodiment of the present application when in a drainage state.

Icon: 10-double-pipe high-pressure waterway conversion control device; 100-a valve core rod; 110-a drill pipe joint; 120-water injection cavity; 140-a water outlet; 200-a valve body; 210-a first valve body; 220-a second valve body; 230-a fracturing chamber; 231-an inlet end; 232-outlet end; 233-a first cavity section; 234-a second cavity section; 235-an annular groove; 240-setting the cavity; 250-a valve core rod receiving cavity; 251-a water drainage section; 2511-a water discharge port; 252-setting section; 260-connecting screw thread; 310-a third seal; 320-a fourth seal; 410-a first seal; 420-second seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1, the present embodiment provides a dual-pipe high-pressure waterway conversion control device 10, the dual-pipe high-pressure waterway conversion control device 10 includes a valve core rod 100 and a valve body 200, the valve core rod 100 is movably disposed through the valve body 200, the valve core rod 100 moves relative to the valve body 200 to enable a water outlet 140 of the valve core rod 100 to communicate with a packer setting cavity or a water outlet 2511 of the valve body 200, the valve body 200 includes a fracturing cavity 230, an inlet end 231 of the fracturing cavity 230 is used for communicating with a high-pressure rubber pipe, and an outlet end 232 of the fracturing cavity 230 is used for communicating with a packer fracturing cavity.

The valve core rod 100 can movably penetrate through the valve body 200, and the position of the valve core rod 100 is adjusted, so that the water outlet 140 of the valve core rod 100 is communicated with the packer setting cavity, and setting is realized. Or the position of the valve core rod 100 is adjusted, so that the water outlet 140 of the valve core rod 100 is communicated with the water drainage port 2511 of the valve body 200, and water drainage is realized. In addition, the fracturing cavity 230 is formed in the valve body 200, and the high-pressure rubber pipe can be communicated with the fracturing cavity of the packer through communication with the fracturing cavity 230, so that the high-pressure rubber pipe is prevented from being parallelly bound with a water drainage device, and friction between the high-pressure rubber pipe and a rock wall is avoided. This double-barrelled high pressure water route conversion controlling means 10 has integrateed the seat and has sealed the water route, the fracturing water route and sluiceway, has improved the integrated level of device greatly, has also improved measurement of efficiency and measurement success rate, has avoided the friction of high-pressure rubber pipe with the cliff.

In the present embodiment, the drill rod joint 110 is disposed at one end of the valve core rod 100 outside the valve body 200, and the end of the valve core rod 100 inside the valve body 200 is closed. Referring to fig. 1, a drill rod joint 110 is provided at the upper end of the valve core rod 100, and the lower end of the valve core rod 100 is closed. The drill pipe joint 110 is used to connect with a drill pipe. The valve core rod 100 is provided with a water injection cavity 120, and the water injection cavity 120 is communicated with the outside from the upper end of the valve core rod 100. When the drill rod is connected with the valve core rod 100 through the drill rod joint 110, the water outlet of the drill rod is communicated with the water injection cavity 120 of the valve core rod 100. In the present embodiment, the water outlet 140 of the valve core rod 100 is opened on the peripheral surface of the valve core rod 100. Referring to fig. 2, a water outlet groove is formed on the circumferential surface of the valve core rod 100, a water outlet 140 is formed on the bottom wall of the water outlet groove, and the water outlet 140 is communicated with the water injection cavity 120.

Referring to fig. 1, in the present embodiment, the valve body 200 includes a setting chamber 240 and a spool rod receiving chamber 250, and the setting chamber 240 is used for communicating with a packer setting chamber. The spool rod receiving cavity 250 includes a relief section 251 and a setting section 252, and the spool rod 100 is movably received within the spool rod receiving cavity 250. When the water outlet 140 of the valve core rod 100 is positioned in the setting section 252, the water outlet 140 is communicated with the setting cavity 240. When the water outlet 140 is located in the water discharging section 251, the water outlet 140 is communicated with a water discharging opening 2511 opened on the wall of the water discharging section 251. A spool rod receiving cavity 250 is opened in the valve body 200 such that the spool rod 100 is movably received in the spool rod receiving cavity 250. The cavity section of the water outlet 140 of the valve core rod 100 in the valve core rod accommodating cavity 250 is adjusted, so that the water outlet 140 of the valve core rod 100 can be communicated with the setting cavity 240 or the water discharge opening 2511.

In this embodiment, the diameter of the bleed-off section 251 is greater than the outer diameter of the valve core rod 100. The diameter of the water discharging section 251 is set to be larger than the outer diameter of the valve core rod 100, so that water can be discharged conveniently. In an alternative embodiment, the diameter of the water discharging section 251 is equal to the outer diameter of the valve core rod 100, and at this time, if water discharging is required, the valve core rod 100 needs to be moved to align the water outlet 140 of the valve core rod 100 with the water discharging opening 2511.

Referring to fig. 1, in the present embodiment, the valve body 200 includes a first valve body 210 and a second valve body 220, and the first valve body 210 is detachably connected to the second valve body 220. The spool rod receiving chamber 250 opens partially into the first valve body 210 and partially into the second valve body 220. The inlet end 231 opens into the first valve body 210 and the outlet end 232 opens into the second valve body 220. The water discharging section 251 and the setting chamber 240 are opened at the second valve body 220. By dividing the valve body 200 into the first valve body 210 and the second valve body 220, manufacturing and installation are facilitated.

Referring to fig. 1 and fig. 2, in the present embodiment, a first valve body 210 is screwed to a second valve body 220. The end surface of the second valve body 220 close to the first valve body 210 is provided with a first sealing member 410, and the circumferential surface of the second valve body 220 connected to the first valve body 210 is provided with a second sealing member 420. The first seal 410 may prevent water exiting the outlet 140 of the stem 100 from escaping into the fracture chamber 230. The second seal 420 can prevent water in the fracturing chamber 230 from escaping the valve body 200. In this embodiment, the first seal 410 and the second seal 420 are both sealing rings. In other alternative embodiments, the first and

second seals

410, 420 may also be a sealant, a wad, or the like.

The fracturing chamber 230 includes an inlet end 231, an outlet end 232, a first chamber section 233, and a second chamber section 234. In the present embodiment, the inlet end 231 opens at the end surface of the first valve body 210. The inlet end 231 is disposed at the end face of the first valve body 210, so that the high-pressure rubber hose can be prevented from passing through the periphery of the valve body 200 and directly connected to the packer, and abrasion of the high-pressure rubber hose is avoided as much as possible. Meanwhile, the integration level of the device is improved, and the measuring efficiency and the success rate are improved. In an alternative embodiment, the inlet end 231 is opened on the circumferential surface of the first valve body 210, and although the high-pressure hose needs to be connected with the inlet end 231 from the circumferential surface, due to the existence of the fracturing cavity 230, the service length of the high-pressure hose is shortened, and the high-pressure hose can be prevented from contacting the rock wall to a certain extent. In the present embodiment, the outlet end 232 opens at an end surface of the second valve body 220 away from the first valve body 210. The first chamber section 233 opens into the first valve body 210, the first chamber section 233 communicating with the inlet end 231. In this embodiment, in order to facilitate the connection of the inlet end 231 with the high-pressure hose, a hose connector is further disposed on the inlet end 231. A second chamber section 234 opens into the second valve body 220, the second chamber section 234 communicating with the outlet end 232. An annular groove 235 is formed in the end face, close to the second valve body 220, of the first valve body 210, and the first cavity section 233 is communicated with the second cavity section 234 through the annular groove 235. Since the first valve body 210 and the second valve body 220 are screw-coupled, it is difficult to ensure the alignment of the first chamber section 233 and the second chamber section 234 without providing the annular groove 235 when coupling the first valve body 210 and the second valve body 220. By providing the annular groove 235, it is not necessary to ensure that the first cavity section 233 and the second cavity section 234 are aligned, but rather it is only necessary to ensure that the first cavity section 233 communicates with the annular groove 235 and the second cavity section 234 communicates with the annular groove 235. In the present embodiment, the first cavity section 233 and the second cavity section 234 are both long straight circular holes, and the axis of the first cavity section 233 is parallel to the axis of the second cavity section 234 and parallel to the axis of the valve core rod 100.

In the present embodiment, the first valve body 210 is screw-coupled to the second valve body 220. In an alternative embodiment, the first valve body 210 is snap fit with the second valve body 220. For example, the first valve body 210 has a snap groove, the second valve body 220 has a snap projection, and the snap projection is inserted into the snap groove, so that the first valve body 210 and the second valve body 220 are snap-fitted.

Referring to fig. 1 and fig. 2, a third seal 310 and a fourth seal 320 are disposed between the valve core rod 100 and the valve body 200. The setting section 252 is located between the third seal 310 and the fourth seal 320, and the fourth seal 320 is located between the water drainage section 251 and the setting section 252. The setting section 252 is located between the third seal 310 and the fourth seal 320 and prevents water from exiting the outlet 140 of the stem 100 from escaping up or down. The fourth seal 320 is located between the water leaking section 251 and the setting section 252, and separates the water leaking section 251 and the setting section 252, so as to prevent water in the setting waterway from leaking to the water leaking waterway. In the present embodiment, referring to fig. 1 and fig. 2, a plurality of third sealing members 310 are provided, and the plurality of third sealing members 310 are distributed in the axial direction of the valve core rod 100 at intervals. The number of the fourth seals 320 is multiple, and the multiple fourth seals 320 are distributed at intervals in the axial direction of the valve core rod 100. By providing a plurality of third seals 310 and a plurality of fourth seals 320, the sealing effect is enhanced. In this embodiment, the third seal 310 and the fourth seal 320 are both seal rings. In other alternative embodiments, the third and

fourth seals

310, 320 may also be a sealant, a wad, or the like.

Referring to fig. 1, in the present embodiment, one end of the second valve body 220 is provided with a connection thread 260, and the connection thread 260 is used for connecting with a packer. The connecting thread 260 is arranged on the second valve body 220, so that the second valve body 220 can be conveniently in threaded connection with a packer, metal pipe fittings are avoided, and the integration level of the double-pipe high-pressure water path conversion control device 10 is improved. Referring to fig. 1, a stopping portion is further disposed at the upper end of the first valve body 210, and the stopping portion can stop a shaft shoulder on the valve core rod 100 to prevent the valve core rod 100 from being separated from the valve body 200 from the upper end of the valve body 200.

The double-pipe high-pressure waterway conversion control device 10 provided by the embodiment works as follows:

the double-pipe high-pressure waterway conversion control device 10 comprises a setting state, a draining state and a fracturing state, and when the water outlet 140 is positioned in the setting section 252, the setting state is obtained, as shown in fig. 1; when the water outlet 140 is located at the water discharging section 251, the water discharging state is obtained, as shown in fig. 3. Referring to fig. 1, the upper end of the valve core rod 100 is connected with the drill rod, the second valve body 220 is connected with the packer through a connecting thread 260, and the inlet end 231 is connected with the high-pressure rubber pipe. The valve core rod 100 is lifted upwards, so that the water outlet 140 of the valve core rod 100 is positioned in the setting section 252, that is, the water outlet 140 is communicated with the setting cavity 240. At this time, if the drill rod injects water into the water injection cavity 120, setting can be realized. The inlet end 231 is injected with water through the high-pressure rubber hose, and then fracturing can be realized (the double-pipe high-pressure waterway conversion control device 10 is in a fracturing state). Referring to fig. 3, the valve core rod 100 is lowered downward, so that the water outlet 140 of the valve core rod 100 is located in the water discharging section 251, that is, the water outlet 140 is communicated with the water discharging section 251, and water discharging can be achieved.

The embodiment provides a double-pipe high-pressure waterway conversion control device 10, the double-pipe high-pressure waterway conversion control device 10 comprises a valve core rod 100 and a valve body 200, the valve core rod 100 is movably arranged in the valve body 200 in a penetrating manner, the valve core rod 100 moves relative to the valve body 200 to enable a water outlet 140 of the valve core rod 100 to be communicated with a packer setting cavity or a water outlet 2511 of the valve body 200, the valve body 200 comprises a fracturing cavity 230, an inlet end 231 of the fracturing cavity 230 is used for being communicated with a high-pressure rubber pipe, and an outlet end 232 of the fracturing cavity 230 is used for being communicated with the packer fracturing. The valve core rod 100 can movably penetrate through the valve body 200, and the position of the valve core rod 100 is adjusted, so that the water outlet 140 of the valve core rod 100 is communicated with the packer setting cavity, and setting is realized. Or the position of the valve core rod 100 is adjusted, so that the water outlet 140 of the valve core rod 100 is communicated with the water drainage port 2511 of the valve body 200, and water drainage is realized. In addition, the fracturing cavity 230 is formed in the valve body 200, and the high-pressure rubber pipe can be communicated with the fracturing cavity of the packer through communication with the fracturing cavity 230, so that the high-pressure rubber pipe is prevented from being parallelly bound with the water drainage device, and the high-pressure rubber pipe is prevented from being extruded and rubbed with a rock wall and the water drainage device. This double-barrelled high pressure water route conversion controlling means 10 has integrateed the seat and has sealed the water route, the fracturing water route and sluiceway, has improved the integrated level of device greatly, has also improved measurement of efficiency and measurement success rate, has avoided the friction of high-pressure rubber pipe with the cliff.

The embodiment of the application also provides a stress measurement system, which comprises a drill rod, a packer, a high-pressure rubber pipe and the double-pipe high-pressure waterway conversion control device 10, wherein the drill rod is communicated with the valve core rod 100, the valve body 200 is communicated with the packer setting cavity, the inlet end 231 is communicated with the high-pressure rubber pipe, and the outlet end 232 is communicated with the packer fracturing cavity. The high-pressure rubber pipe of the stress measurement system can be communicated with the fracturing cavity of the packer through being communicated with the fracturing cavity 230 of the double-pipe high-pressure waterway conversion control device 10, so that the high-pressure rubber pipe is prevented from being bound with the water drainage device in parallel, the high-pressure rubber pipe is prevented from being extruded and rubbed with the rock wall and the water drainage device, and the high-pressure rubber pipe is enabled to have a longer service life. Double-barrelled high pressure water route conversion controlling means 10 has integrateed the seat and has sealed the water route, fracturing water route and sluicing water route, has higher integrated level, has also improved stress measurement system's measurement of efficiency and measurement success rate simultaneously.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The double-pipe high-pressure water path conversion control device is characterized by comprising a valve core rod and a valve body, wherein the valve core rod is movably arranged in the valve body in a penetrating manner, the valve core rod can move relative to the valve body to enable a water outlet of the valve core rod to be communicated with a packer setting cavity or a water outlet of the valve body, the valve body comprises a fracturing cavity, an inlet end of the fracturing cavity is used for being communicated with a high-pressure rubber pipe, and an outlet end of the fracturing cavity is used for being communicated with a fracturing cavity of the packer;

the valve body comprises a setting cavity and a valve core rod accommodating cavity, the setting cavity of the valve body is communicated with the setting cavity of the packer, the valve core rod accommodating cavity comprises a water drainage section and a setting section, the valve core rod is movably accommodated in the valve core rod accommodating cavity, when the water outlet of the valve core rod is positioned in the setting section, the water outlet is communicated with the setting cavity of the valve body, and when the water outlet is positioned in the water drainage section, the water outlet is communicated with a water drainage port formed in the wall of the water drainage section;

the valve body comprises a first valve body and a second valve body, the first valve body is detachably connected with the second valve body, a part of the valve core rod accommodating cavity is arranged on the first valve body, the other part of the valve core rod accommodating cavity is arranged on the second valve body, the inlet end is arranged on the first valve body, the outlet end is arranged on the second valve body, and the water drainage section and the setting cavity of the valve body are arranged on the second valve body;

the first valve body is in threaded connection with the second valve body, a first sealing element is arranged on the end face, close to the first valve body, of the second valve body, and a second sealing element is arranged on the circumferential face, connected with the first valve body, of the second valve body;

the inlet end is arranged on the upper end face of the first valve body.

2. The double-pipe high-pressure waterway conversion control device of claim 1, wherein the fracturing chamber comprises a first chamber section and a second chamber section, the first chamber section is arranged on the first valve body and communicated with the inlet end, the second chamber section is arranged on the second valve body and communicated with the outlet end, an annular groove is arranged on an end surface of the first valve body close to the second valve body, and the first chamber section is communicated with the second chamber section through the annular groove.

3. The double-pipe high-pressure waterway conversion control device of claim 1, wherein the diameter of the water discharge section is larger than the outer diameter of the valve core rod.

4. The double-pipe high-pressure waterway conversion control device of claim 1, wherein a third seal and a fourth seal are arranged between the valve core rod and the valve body, the setting section is located between the third seal and the fourth seal, and the fourth seal is located between the water leakage section and the setting section.

5. The double-pipe high-pressure waterway conversion control device of claim 1, wherein one end of the valve body is provided with a connecting thread, and the connecting thread is used for connecting with a packer.

6. A stress measurement system is characterized by comprising a drill rod, a packer, a high-pressure rubber pipe and the double-pipe high-pressure waterway conversion control device according to any one of claims 1 to 5, wherein the drill rod is communicated with the valve core rod, the valve body is communicated with a setting cavity of the packer, the inlet end is communicated with the high-pressure rubber pipe, and the outlet end is communicated with a fracturing cavity of the packer.