CN219200216U

CN219200216U - Carbon dioxide blasting cracking pipe

Info

Publication number: CN219200216U
Application number: CN202320369024.9U
Authority: CN
Inventors: 孙彦飞; 张明雷; 张顺柱; 孙茂渠
Original assignee: Shandong Wenli Construction Machinery Co ltd
Current assignee: Shandong Wenli Construction Machinery Co ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-06-16
Anticipated expiration: 2033-03-02

Abstract

The application provides a carbon dioxide blasting fracturing pipe, which belongs to the technical field of carbon dioxide blasting. The carbon dioxide blasting fracturing pipe comprises a pipeline assembly, a fracturing assembly and a blasting assembly. A liquid storage cavity is arranged in the cracking tube; the heating pipe is arranged at one end of the filling head and is positioned in the liquid storage cavity, and the power line of the exploder is electrically connected with the heating pipe; the pressure relief head is internally provided with an air outlet cavity which is communicated with the liquid storage cavity, a plurality of vent holes which are in an annular array are formed in the pressure relief head and are respectively communicated with the air outlet cavity, a detachable plugging bolt is arranged on the vent hole, and a gasket rupture disc group is arranged at the joint of the pressure relief head and the rupture tube. The vent holes can be plugged through the plugging bolts, the blasting intensity of different directions can be controlled, the control of the blasting intensity is realized, and meanwhile, the plugging of different vent hole numbers can be carried out according to different requirements, so that blasting personnel can master the blasting intensity.

Description

Carbon dioxide blasting cracking pipe

Technical Field

The application relates to the field of carbon dioxide blasting, in particular to a carbon dioxide blasting cracking tube.

Background

The liquid carbon dioxide phase transition fracturing technology is an explosion technology with advanced concept, intrinsic safety, environmental protection and obvious explosion effect. Carbon dioxide blasting starts in the fifties of the twentieth century, and the eighties start to develop in the united states, mainly avoiding explosion accidents caused by flames generated by explosive blasting, and is specially developed for the coal face of a high-gas mine, so that the gas permeability of a coal seam can be effectively improved, and the gas extraction effect is enhanced. Carbon dioxide fracturing tubes are now commonly used in fracturing operations of rock formations, coal beds.

For the liquid carbon dioxide phase change fracturing technology, a fracturing pipe filled with liquid carbon dioxide is generally placed in a drill hole, then the liquid carbon dioxide is rapidly expanded in a heating mode, and the liquid carbon dioxide is ejected from a release hole of a release pipe (energy release device) to impact a coal bed, so that cracks are generated in the coal bed.

But in the blasting process, the blasting intensity of the blasting area cannot be controlled, so that the blasting is also performed in the direction of a cracking pipe which does not need to be blasted, the subsequent work is easy to influence, and the subsequent work of the rock stratum or the coal seam is influenced.

Disclosure of Invention

In order to make up the defects, the application provides a carbon dioxide blasting cracking pipe, which aims to improve the problem that the blasting strength of a blasting area cannot be controlled, so that the cracking pipe direction which does not need to be blasted is blasted, the subsequent work is easy to influence, and the subsequent work of a rock stratum or a coal seam is influenced.

The embodiment of the application provides a carbon dioxide blasting fracturing pipe, which comprises a pipeline assembly, a fracturing assembly and a blasting assembly.

The pipeline assembly comprises a cracking pipe, and a liquid storage cavity is arranged in the cracking pipe; the fracturing assembly comprises a filling head, a heating pipe and an exploder power line, wherein the filling head is detachably connected with one end of the fracturing pipe, the heating pipe is arranged at one end of the filling head and is positioned in the liquid storage cavity, and the exploder power line is electrically connected with the heating pipe; the explosion assembly comprises a pressure relief head and a gasket rupture disc group, wherein one end of the pressure relief head is detachably connected with the other end of the cracking pipe, an air outlet cavity is formed in the pressure relief head, the air outlet cavity is communicated with the liquid storage cavity, a plurality of vent holes which are in an annular array are formed in the pressure relief head, all the vent holes are respectively communicated with the air outlet cavity, detachable plugging bolts are arranged on the vent holes, and the gasket rupture disc group is internally arranged at the joint of the pressure relief head and the cracking pipe.

In the implementation process, during blasting, liquid carbon dioxide is compressed to the inside of a liquid storage cavity of a cracking pipe through a high-pressure pump, then a gasket cracking sheet group is installed, a pressure relief head and a filling head are connected with two ends of the cracking pipe, then the pressure relief head and the filling head are plugged into vent holes in the direction where blasting is not needed according to the required position, the vent holes are plugged, the adjustment of the blasting intensity of a blasting area can be achieved, then a power line of a blaster is connected with a power supply, a heating pipe is used for heating the liquid carbon dioxide, gas is instantaneously changed into gas to be discharged from the vent holes which are not plugged for blasting, and the filling head and the pressure relief head can be detached from the two ends of the cracking pipe for cleaning after blasting is finished, so that the next use is achieved. The vent holes can be plugged through the plugging bolts, the blasting intensity of different directions can be controlled, the control of the blasting intensity is realized, and meanwhile, the plugging of different vent hole numbers can be carried out according to different requirements, so that blasting personnel can master the blasting intensity. The filling head, the pressure release head and the cracking pipe are detachably connected, so that the whole cracking pipe is subjected to sectional processing, and then the whole assembly is formed, the defect of whole processing is overcome, the production efficiency is improved, and the production cost is reduced.

In a specific embodiment, a first countersink is arranged at each exhaust hole on the outer side of the pressure relief head, and the plugging bolt and nut end is arranged inside the first countersink.

In the implementation process, the plugging bolt is arranged in the first counter bore to prevent the plugging bolt from affecting the insertion of the cracking pipe when the cracking pipe is inserted into the rock stratum or the coal seam.

In a specific embodiment, a threaded pipe is fixedly connected to one end of the pressure relief head, which is close to the cracking pipe, and an internal thread matched with an external thread of the threaded pipe is arranged inside one end of the cracking pipe, which is close to the threaded pipe.

In the implementation process, the detachable connection of the pressure relief head and the cracking pipe is realized through the matching of the external thread of the threaded pipe and the internal thread of the cracking pipe.

In a specific embodiment, annular limiting plates are symmetrically fixed inside one end, close to the threaded pipe, of the cracking pipe.

In the implementation process, the annular limiting plate is used for limiting the threaded pipe, so that the threaded pipe is prevented from being excessively connected with the cracking pipe in a threaded manner.

In a specific embodiment, a conical flow guide ring plate is arranged on the outer side of one end, far away from the cracking tube, of the pressure relief head.

In the implementation process, the conical guide ring plate enables the pressure relief head to have a guide effect when being inserted into a rock stratum or a coal seam.

In a specific embodiment, the splinting tube and the filling head are provided with fixing bolts in a ring array.

In the implementation process, the detachable connection of the filling head and the cracking pipe is realized through the fixing bolts, and at least one fixing bolt is arranged.

In a specific embodiment, second countersunk holes are respectively formed in the outer sides of the cracking tubes and located in all the fixing bolt nuts.

In the implementation process, the fixing bolt is arranged in the second countersink, so that the fixing bolt is prevented from affecting the insertion of the cracking pipe when the cracking pipe is inserted into the rock stratum or the coal seam.

In a specific embodiment, the filling head is symmetrically fixed with limiting blocks near the outer side of the cracking tube, and limiting grooves matched with the limiting blocks are symmetrically arranged in the cracking tube.

In the implementation process, the limiting block can enable the thread notch formed in the cracking pipe and the filling head to be aligned, and fixing of the fixing bolt is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a carbon dioxide blasting fracturing pipe according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a blasting assembly according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2B according to an embodiment of the present application;

fig. 4 is an enlarged schematic structural diagram at a in fig. 1 according to an embodiment of the present application.

In the figure: 10-a pipe assembly; 110-cracking tube; 111-a liquid storage cavity; 112-a second counterbore; 120-annular limiting plates; 20-fracturing component; 210-a filling head; 220-heating the pipe; 230-an initiator power cord; 240-fixing bolts; 250-limiting blocks; 30-blasting assembly; 310-pressure relief head; 311-an air outlet cavity; 312-exhaust holes; 313-a first counterbore; 320-pad rupture disc set; 330-plugging the bolt; 340-threaded pipe; 350-a conical deflector ring plate.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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 apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application.

Referring to fig. 1-4, the present application provides a carbon dioxide blasting fracturing pipe comprising a pipe assembly 10, a fracturing assembly 20, and a blasting assembly 30.

The pipe assembly 10 is used for storing liquid carbon dioxide, the fracturing assembly 20 heats and gasifies the liquid carbon dioxide, the blasting assembly 30 can enable gasified carbon dioxide to be discharged from the exhaust hole 312, blasting is achieved, meanwhile, the exhaust hole 312 can be plugged through the plugging bolt 330, and the blasting intensity and the blasting azimuth intensity are controlled.

Referring to fig. 1 and 4, the pipe assembly 10 includes a cracking tube 110, and a liquid storage cavity 111 is disposed inside the cracking tube 110; wherein the liquid carbon dioxide is compressed by the high pressure pump into the reservoir 111 of the cracking tube 110.

In a specific arrangement, the annular limiting plate 120 is symmetrically fixed inside the end of the cracking tube 110, which is close to the threaded tube 340, and specifically, the annular limiting plate 120 is fixed inside the cracking tube 110 by welding. The annular limiting plate 120 is used for limiting the threaded pipe 340, so that the threaded pipe 340 is prevented from being excessively connected with the cracking pipe 110 in a threaded manner.

Further, the outer side of the cracking tube 110 is provided with second countersunk holes 112 at nuts of the fixing bolts 240, respectively. The fixing bolt 240 is disposed inside the second counter bore 112, so as to prevent the fixing bolt 240 from affecting the insertion of the fracturing pipe 110 when the fracturing pipe 110 is inserted into the rock layer or the coal seam.

Referring to fig. 1 and 4, the fracturing assembly 20 includes a filling head 210, a heating tube 220 and an initiator power cord 230, wherein the filling head 210 is detachably connected with one end of the fracturing tube 110, the heating tube 220 is disposed at one end of the filling head 210 and is located inside the liquid storage cavity 111, the initiator power cord 230 is electrically connected with the heating tube 220, and the initiator power cord 230 can be powered by a mobile power source preferentially; wherein, the filling head 210 is connected with one end of the cracking tube 110, and then the power line 230 of the initiator is connected with the power supply, so that the heating tube 220 heats the liquid carbon dioxide to realize the gasification of the liquid carbon dioxide for blasting, and after the blasting is finished, the heating tube 220 and the filling head 210 can be detached from one end of the cracking tube 110 together, thereby being convenient for cleaning.

In a specific arrangement, the cracking tube 110 and the filling head 210 are provided with fixing bolts 240 in an annular array, and specifically, the fixing bolts 240 may be hexagon socket bolts, and the cracking tube 110 and the filling head 210 are respectively provided with threaded holes matched with the fixing bolts 240. Wherein, the detachable connection of the filling head 210 and the cracking tube 110 is realized through the fixing bolts 240, and at least 3 fixing bolts 240 are arranged.

In a specific arrangement, the stopper 250 is symmetrically fixed on the outer side of the end of the filling head 210, which is close to the cracking tube 110, and specifically, the stopper 250 and the outer side of the filling head 210 are integrally formed. Limiting grooves matched with limiting blocks 250 are symmetrically arranged in the cracking tube 110. The limiting block 250 may align threaded notches formed on the cracking tube 110 and the filling head 210, so as to facilitate the fixing of the fixing bolt 240.

Referring to fig. 1, 2 and 3, the blasting assembly 30 includes a pressure relief head 310 and a gasket rupture disc set 320, one end of the pressure relief head 310 is detachably connected with the other end of the rupture tube 110, an air outlet cavity 311 is provided in the pressure relief head 310, the air outlet cavity 311 is communicated with the liquid storage cavity 111, a plurality of air outlet holes 312 in an annular array are provided on the pressure relief head 310, the air outlet holes 312 are respectively communicated with the air outlet cavity 311, detachable blocking bolts 330 are provided on the air outlet holes 312, the blocking bolts 330 can be hexagon socket head bolts, and the gasket rupture disc set 320 is internally arranged at the joint of the pressure relief head 310 and the rupture tube 110. Wherein, after breaking the piece group 320 with the gasket, connect the pressure release head 310 with the other end of the cracking tube 110, then carry out the position of blasting as required, block up the bolt 330 in the vent hole 312 that need not the position of blasting, block up the vent hole 312, realize can be to the regulation of the blast intensity of blasting region, change gas in the twinkling of an eye and discharge from the unblocked vent hole 312 and explode, can dismantle the pressure release head 310 from the both ends of cracking tube 110 and clean after the blasting is finished, so that the next use. The vent holes 312 can be plugged through the plugging bolts 330, the blasting intensity in different directions can be controlled, the control of the blasting intensity is realized, and meanwhile, the plugging of the different numbers of the vent holes 312 can be carried out according to different requirements, so that blasting personnel can master the blasting intensity. The filling head 210 and the pressure relief head 310 are detachably connected with the cracking pipe 110, so that the whole cracking pipe 110 is subjected to sectional processing, and then the whole assembly is formed, the defect of whole processing is overcome, the production efficiency is improved, and the production cost is reduced.

In this embodiment, the outer tube surface, end surface and inner tube bore of the fracturing tube 110, the filling head 210 and the pressure relief head 310 are polished by machining.

When the sealing device is specifically arranged, a first countersunk hole 313 is formed in the outer side of the pressure relief head 310 at each exhaust hole 312, and the nut end of the sealing bolt 330 is arranged in the first countersunk hole 313. The plugging bolt 330 is disposed inside the first countersunk hole 313, so as to prevent the plugging bolt 330 from affecting the insertion of the fracturing pipe 110 when the fracturing pipe 110 is inserted into a rock layer or a coal seam.

In a specific arrangement, the pressure relief head 310 is fixedly connected with the threaded pipe 340 near one end of the fracturing pipe 110, and an internal thread matched with an external thread of the threaded pipe 340 is arranged inside one end of the fracturing pipe 110 near the threaded pipe 340. Wherein, the detachable connection of the pressure relief head 310 and the fracturing pipe 110 is realized by the cooperation of the external thread of the threaded pipe 340 and the internal thread of the fracturing pipe 110.

In a specific arrangement, the outer side of the end of the pressure relief head 310 away from the fracturing pipe 110 is provided with a conical deflector 350. Wherein the tapered deflector ring 350 provides a guiding action for the pressure relief head 310 when inserted into a formation or coal seam.

The working principle of the carbon dioxide blasting cracking pipe is as follows:

during blasting, liquid carbon dioxide is compressed into the liquid storage cavity 111 of the cracking tube 110 through the high-pressure pump, then gasket rupture disc groups 320 are installed, the pressure relief head 310 and the filling head 210 are connected with two ends of the cracking tube 110, then the plugging bolts 330 are plugged into vent holes 312 in the direction without blasting according to the required blasting positions, the vent holes 312 are plugged, the adjustment of the blasting intensity of a blasting area can be achieved, then the power line 230 of the exploder is connected with a power supply, the heating tube 220 heats the liquid carbon dioxide, gas is instantaneously changed into gas to be discharged from the vent holes 312 without plugging for blasting, and after blasting is finished, the filling head 210 and the pressure relief head 310 can be detached from the two ends of the cracking tube 110 for cleaning so as to be convenient for next use. The vent holes 312 can be plugged through the plugging bolts 330, the blasting intensity in different directions can be controlled, the control of the blasting intensity is realized, and meanwhile, the plugging of the different numbers of the vent holes 312 can be carried out according to different requirements, so that blasting personnel can master the blasting intensity. The filling head 210 and the pressure relief head 310 are detachably connected with the cracking pipe 110, so that the whole cracking pipe 110 is subjected to sectional processing, and then the whole assembly is formed, the defect of whole processing is overcome, the production efficiency is improved, and the production cost is reduced.

It should be noted that, the specific model specification of the initiator power cord 230 needs to be determined by selecting a model according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the initiator power supply line 230 and its principles will be apparent to those skilled in the art and will not be described in detail herein.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A carbon dioxide blasting cracking tube is characterized by comprising

A pipe assembly (10), the pipe assembly (10) comprising a fracturing pipe (110), a liquid storage cavity (111) being arranged inside the fracturing pipe (110);

the fracturing assembly (20), the fracturing assembly (20) comprises a filling head (210), a heating pipe (220) and an exploder power line (230), the filling head (210) is detachably connected with one end of the fracturing pipe (110), the heating pipe (220) is arranged at one end of the filling head (210) and is positioned in the liquid storage cavity (111), and the exploder power line (230) is electrically connected with the heating pipe (220);

the explosion assembly (30), explosion assembly (30) is including pressure release head (310) and gasket rupture disc group (320), pressure release head (310) one end with it can dismantle to be connected to cause the crack tube (110) other end, pressure release head (310) inside is provided with out air cavity (311), go out air cavity (311) with stock solution chamber (111) intercommunication, set up a plurality of exhaust hole (312) that are annular array on pressure release head (310), and all exhaust hole (312) respectively with go out air cavity (311) intercommunication, be equipped with detachable shutoff bolt (330) on exhaust hole (312), gasket rupture disc group (320) are built-in pressure release head (310) with it is located to cause crack tube (110).

2. The carbon dioxide blasting cracking tube according to claim 1, wherein a first countersink (313) is arranged at each of the exhaust holes (312) on the outer side of the pressure relief head (310), and the nut end of the plugging bolt (330) is arranged inside the first countersink (313).

3. The carbon dioxide blasting cracking tube according to claim 2, wherein a threaded tube (340) is fixedly connected to one end of the pressure relief head (310) close to the cracking tube (110), and an internal thread matched with an external thread of the threaded tube (340) is arranged inside one end of the cracking tube (110) close to the threaded tube (340).

4. A carbon dioxide blasting cracking tube according to claim 3, wherein an annular limiting plate (120) is symmetrically fixed inside the cracking tube (110) near one end of the threaded tube (340).

5. The carbon dioxide blasting cracking tube of claim 4, wherein a conical deflector ring (350) is disposed outside an end of the pressure relief head (310) remote from the cracking tube (110).

6. The carbon dioxide blasting cracking tube of claim 5, wherein the cracking tube (110) and the filling head (210) are provided with fixing bolts (240) in a ring array.

7. The carbon dioxide blasting cracking tube of claim 6, wherein the outside of the cracking tube (110) is provided with second countersunk holes (112) at the nuts of all the fixing bolts (240), respectively.

8. The carbon dioxide blasting cracking tube according to claim 7, wherein the filling head (210) is symmetrically fixed with a limiting block (250) near the outer side of the cracking tube (110), and limiting grooves matched with the limiting block (250) are symmetrically arranged in the cracking tube (110).