CN117552786A - Roof frosted jet fracturing capping device and capping method - Google Patents

Abstract

The invention discloses a top plate frosted jet fracturing and roof cutting device and a roof cutting method, wherein the top plate frosted jet fracturing and roof cutting device comprises a first hole packer, a jet device, a second hole packer, a connecting pipe and a drill rod, wherein the first hole packer is provided with a first bag body; the ejector is connected with the first hole packer, and is provided with a first flow passage and a nozzle which is communicated with the first flow passage; the second hole packer is connected with the ejector and comprises a rod body, a valve group and a second bag body, the rod body is provided with a second flow passage, a third flow passage and a fracturing hole, the second flow passage is communicated with the first flow passage, the fracturing hole is communicated with the third flow passage, the valve group is arranged on the rod body, and the second bag body is arranged on the outer peripheral side of the rod body and is communicated with the third flow passage; the connecting pipe is connected between the first flow channel and the third flow channel, the drill rod is provided with a fourth flow channel and a fifth flow channel, the fourth flow channel is communicated with the second flow channel, and the second bag body is connected between the fifth flow channel and the third flow channel. The roof cutting device disclosed by the invention can simplify the process complexity in the process of cutting the roof by using the frosted jet flow, and is simple to operate and convenient to use.

Description

Roof frosted jet fracturing capping device and capping method

Technical field

The present invention relates to the field of mining technology, and specifically to a roof frosted jet fracturing and roofing device and a roofing method.

Background technique

The failure of the coal mine's thick hard roof to collapse in time after mining will lead to problems such as large deformation of the roadway and strong mine pressure, which will in turn bring about hidden dangers of dynamic disasters such as rock bursts and mine earthquakes. In order to avoid the above problems, in the existing technology, the frosted roof jet axial roofing technology is usually used to roof the thick hard roof. This technology has the advantages of accurate pressure relief, large pressure relief radius, safety and efficiency, and has been used in many projects in my country. It has been applied in mining areas and achieved remarkable results.

However, during the construction process of frosted jet roofing technology, since it involves multiple steps such as drilling, seaming, sealing, and fracturing, the roofing process has complicated processes, many pipelines in the holes, high failure rates, and construction risks. Problems such as large size and high labor intensity have seriously restricted the further promotion and application of this technology. In view of this, providing a new frosted jet capping device has become an urgent problem that needs to be solved.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art, at least to a certain extent.

To this end, embodiments of the present invention propose a roof frosted jet fracturing and capping device. The roof frosted jet fracturing and capping device can simplify the process complexity in the frosted jet capping process, is simple to operate, easy to use, and has a stable structure. Reliable, low failure rate, reducing overall labor intensity.

An embodiment of the present invention also proposes a capping method based on the above-mentioned roof frosted jet fracturing capping device.

The roof frosted jet fracturing and roofing device according to the embodiment of the present invention includes:

A first hole sealing device, a first capsule is provided on the outer peripheral side of the first hole sealing device;

A jet device, one end of the jet device is connected to the first hole sealer, the jet device is provided with a first flow channel and a nozzle, and the nozzle is connected to the first flow channel;

A second hole sealing device, the second hole sealing device is connected to the other end of the jet, the second hole sealing device includes a rod body, a valve group and a second bag body, the rod body is provided with a second flow channel , the third flow channel and the fracturing hole, the second flow channel is connected to the first flow channel, the fracturing hole is connected to the third flow channel; the valve group is provided on the rod body, the The valve group blocks the fracturing hole when the first liquid is introduced into the third flow channel, and releases the blocking of the fracturing hole when the second liquid is introduced into the third flow channel, and the valve group The hydraulic pressure of the first liquid is smaller than the hydraulic pressure of the second liquid; the second bladder is provided on the outer peripheral side of the rod and communicates with the third flow channel; the fracturing hole is located between the injector and the between the second capsule;

A connecting tube, the connecting tube is connected between the first flow channel and the third flow channel to connect the first bladder and the third fluid when the first liquid is introduced into the second bladder. The two balloons are expandable and define a sealing section between the first balloon and the second balloon;

Drill pipe, the drill pipe has a fourth flow channel and a fifth flow channel, the fourth flow channel is connected to the second flow channel, and the second bladder is connected to the fifth flow channel and the between the third flow channel.

The roof frosted jet fracturing and capping device according to the embodiment of the present invention can simplify the process complexity in the frosted jet capping process, is simple to operate, easy to use, has a stable and reliable structure, has a low failure rate, and reduces the overall labor intensity.

In some embodiments, both the third flow channel and the fifth flow channel are annular flow channels, the third flow channel surrounds the outer peripheral side of the second flow channel, and the fifth flow channel surrounds on the outer peripheral side of the fourth flow channel.

In some embodiments, between the first hole sealer and the injector, between the injector and the second hole sealer, between the second hole sealer and the drill pipe All are detachably connected.

In some embodiments, between the first hole sealer and the injector, between the injector and the second hole sealer, between the second hole sealer and the drill pipe All are threaded connections;

And/or, the connecting pipe is a resin pipe.

In some embodiments, the injector is provided with a slot, the slot extends along the axial direction of the injector, and the connecting pipe is embedded in the slot.

In some embodiments, the valve assembly includes:

The sliding member is slidably assembled on the outer peripheral side of the rod body and has a blocking position and an unblocking position. In the blocking position, the sliding member blocks the fracturing hole, and in the unblocking position position, the sliding member releases the blocking of the fracturing hole;

An elastic member is connected to the sliding member and is used to apply force to the sliding member so that the sliding member can be maintained in the first liquid when the third flow channel is passed into the first liquid. The blocking position, and when the second liquid is introduced into the third flow channel, the hydraulic effect of the second liquid can overcome the force exerted by the elastic member so that the sliding member can switch to the desired position. Describe the unblocking position.

In some embodiments, a first stopper and a second stopper are provided on the outer peripheral side of the rod body, and the first stopper and the second stopper are spaced apart, and the sliding member and the second stopper are spaced apart. The elastic member and the fracturing hole are both located between the first stop part and the second stop part, and one end of the elastic part is in contact with the first stop part and the second stop part. One of the stop parts is connected, and the other end of the elastic part is connected with the sliding part.

In some embodiments, the elastic member is a spring, the spring is sleeved on the outer peripheral side of the rod body, and the sliding member is annular and is sleeved on the outer peripheral side of the rod body.

In some embodiments, the ejector includes:

The main body of the ejector, the first flow channel and the nozzle are both provided on the main body of the ejector;

a first joint and a second joint, the ejector body is connected between the first joint and the second joint, and one of the first joint and the second joint is provided with a liquid inlet hole , the liquid inlet hole is connected with the first flow channel;

A plurality of elastic bodies are arranged at intervals along the circumference of the jet body, and each nozzle is exposed from the interval between two adjacent elastic bodies. Each elastic body is One end of the body is connected to the first joint, the other end of each elastic body is connected to the second joint, and the outer wall surface of each elastic body is used to elastically stop against the hole wall of the drilled hole. Make the jet stop to fit in the drill hole.

The capping method according to the embodiment of the present invention includes the following steps:

S1: Transport abrasive fluid into the fourth flow channel of the drill pipe and move the capping device up and down along the extending direction of the drilled hole to achieve jet cutting of the hole wall of the drilled hole;

S2: Transport the first liquid into the fifth flow channel of the drill pipe;

S3: After the first bladder and the second bladder are inflated and a sealing section is limited between the first bladder and the second bladder, gradually increase the hydraulic pressure of the first liquid. To switch the first liquid to the second liquid;

S4: Use the second liquid to complete directional fracturing of the jet slit in the sealing section;

S5: Withdraw the capping device from the drilling hole or move the position of the capping device to perform cutting and fracturing of the next hole sealing section.

Description of the drawings

Fig. 1 is a schematic diagram of the overall structure of a capping device according to an embodiment of the present invention.

Figure 2 is a schematic diagram of the first hole sealing device in Figure 1.

Figure 3 is a schematic diagram of the ejector in Figure 1.

FIG. 4 is a schematic diagram of the second hole sealing device in FIG. 1 .

Figure 5 is a schematic diagram of the drill pipe in Figure 1.

Reference signs:

The first sealing device 1; the first capsule 11; the inner channel 12;

Jet 2; first flow channel 21; nozzle 22; interface 23;

second sealing device 3; rod body 31; first stopper 311; second stopper 312; valve group 32; sliding member 321; elastic member 322; second bladder 33; second flow channel 34; third Flow channel 35; fracturing hole 36;

Connecting pipe 4;

Drill pipe 5; fourth flow channel 51; fifth flow channel 52.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention.

As shown in Figure 1, the roof frosted jet fracturing and capping device according to the embodiment of the present invention includes a first hole sealer 1, a jet 2, a second hole sealer 3, a connecting pipe 4 and a drill pipe 5. Among them, the first hole sealer 1, the jet 2, the second hole sealer 3, and the drill pipe 5 are connected in sequence from front to back. During use, the first hole sealer 1, the jet 2, the second hole sealer 3, and the drill pipe 5 need to be extended into the borehole in order from front to back.

As shown in Figure 2, a first capsule 11 is provided on the outer peripheral side of the first hole sealer 1. The first capsule 11 can be a capsule, and the first hole sealer 1 can generally be cylindrical, so that it can be used with the drilling process. According to the shape adaptation, the first capsule 11 can be annular and can be sleeved and fixed on the outer peripheral side of the first sealing device 1 . The first bladder 11 has high elasticity, so that it can meet the subsequent use needs of filling the first bladder 11 with liquid.

One end of the ejector 2 is connected to the first hole sealer 1 . The ejector 2 is provided with a first flow channel 21 and a nozzle 22 . The nozzle 22 is connected with the first flow channel 21 . For example, as shown in Figure 3, the ejector 2 can be generally cylindrical, and both the front and rear ends of the ejector 2 can be provided with an interface 23, wherein the front end of the ejector 2 can be connected to the first sealing device 1 through the interface 23. The connection is fixed, and the rear end of the injector 2 can be connected and fixed with the interface 23 passing through the rear end and the second sealing device 3 .

The ejector 2 is provided with a first flow channel 21 and a nozzle 22. For example, the ejector 2 can be provided with a pipeline, the first flow channel 21 can be formed in the pipeline, and the nozzle 22 can be connected and fixed with the pipeline. When the first flow channel After the sanding liquid is introduced into 21, the sanding liquid can be sprayed out through the nozzle 22, thereby achieving jet cutting of the hole wall of the drilled hole.

As shown in FIG. 1 , the second hole sealing device 3 is connected to the rear end of the jet 2 . As shown in FIG. 4 , the second hole sealing device 3 includes a rod 31 , a valve group 32 and a second bladder 33 . The rod body 31 can have a rod-shaped structure, and a second flow channel 34 , a third flow channel 35 and a fracturing hole 36 can be provided in the rod body 31 , wherein both the second flow channel 34 and the third flow channel 35 can be along the length of the rod body 31 Extending in the axial direction (front and back direction), the front end of the second flow channel 34 is connected with the first flow channel 21 in the jet 2, the fracturing hole 36 can extend along the radial direction of the rod body 31 and be connected with the third flow channel 35, and There may be a plurality of fracturing holes 36 , and the plurality of fracturing holes 36 may be arranged at equal intervals along the circumferential direction of the rod body 31 .

As shown in Figure 4, the valve group 32 can be disposed on the outer peripheral side of the rod body 31. When the first liquid is introduced into the third flow channel 35, the valve group 32 can block the fracturing hole 36, thereby avoiding the first liquid In the case of outflow from the fracturing hole 36, when the second liquid is introduced into the third flow channel 35, the valve group 32 can be switched to the position and unblock the fracturing hole 36. At this time, the second liquid can flow from the fracturing hole 36. The crack hole 36 flows out, so that the effect of seam expansion and fracturing can be achieved.

It should be noted that the switching between the two states of the valve group 32 can be achieved through hydraulic pressure, that is, the hydraulic pressure of the first liquid can be much lower than the hydraulic pressure of the second liquid, where the first liquid can be a low-pressure liquid and the second liquid can be a high-pressure liquid. Liquid, under the action of low-pressure liquid, the valve group 32 will not switch positions, but under the action of high-pressure liquid, the valve group 32 can switch positions and release the blockage of the fracturing hole 36. This simplifies the switching control of the valve group 32 and further improves the convenience of operating the top cutting device, that is, it only needs to control the flow of liquids with different hydraulic pressures to the corresponding flow channels.

As shown in FIG. 4 , the second bladder 33 is provided on the outer peripheral side of the rod 31 and communicates with the third flow channel 35 . The fracturing hole 36 is located between the injector 2 and the second bladder 33 . The second capsule 33 may be a capsule, and the structure of the second capsule 33 may be the same as the structure of the first capsule 11 described above.

As shown in Figure 1, the connecting pipe 4 is connected between the first flow channel 21 and the third flow channel 35. Therefore, the first bladder 11, the connecting pipe 4, the third flow channel 35, and the second bladder 33 can be connected along the They are connected in sequence from front to back. When the first liquid is introduced into the second bladder 33, the first liquid can flow into the first bladder 11 through the third flow channel 35 and the connecting tube 4, so that the first liquid can be realized. When the balloon 11 and the second balloon 33 are synchronously expanded, the expanded first balloon 11 and the second balloon 33 can come into contact with the hole wall of the drill hole, so that the first balloon 11 and the second balloon 33 can be in contact with each other. A sealing section is defined between the bladders 33, which can be regarded as a relatively sealed space formed between the first bladder 11 and the second bladder 33, thereby providing a relatively sealed space for subsequent high-pressure fracturing. environment.

As shown in Figure 5, the drill pipe 5 has a fourth flow channel 51 and a fifth flow channel 52. Both the fourth flow channel 51 and the fifth flow channel 52 can extend along the front and rear directions, wherein the front end of the fourth flow channel 51 and The second flow channel 34 is connected, and the second bladder 33 is connected between the fifth flow channel 52 and the third flow channel 35 .

Therefore, the fourth flow channel 51, the second flow channel 34, and the first flow channel 21 can form an independent channel, thereby providing an independent transport path for the nozzle 22 to inject abrasive liquid. The fifth flow channel 52, the second bladder 33, the third flow channel 35, the connecting tube 4, and the first bladder 11 can form another transport path, so that the first bladder 11 and the second bladder 33 can be transported. Expand and form a sealing section.

In addition, when high-pressure water (second liquid) is introduced into the fifth flow channel 52, the fracturing hole 36 will be connected to the peripheral space of the capping device under the hydraulic pressure of the second liquid. At this time, the fifth flow channel 52. The third flow channel 35 and the fracturing hole 36 can form another delivery path, so that the high-pressure water can flow to the sealing section between the first bladder 11 and the second bladder 33, and then the nozzle 22 can be The slits formed by the spray expand into the fabric and cause cracks.

According to the roof frosted jet fracturing capping device according to the embodiment of the present invention, after the capping device is placed in the borehole, it can complete the cutting and sealing of seams by introducing different fluids into different conveying paths in the corresponding order. Drilling, fracturing and other processes avoid the need to frequently switch between different equipment in drilling to complete the corresponding process or procedure in related technologies, simplifying the process complexity in the frosted jet capping process, making it simple to operate and easy to use. The structure is stable and reliable, the failure rate is low, and the overall labor intensity is reduced.

In some embodiments, as shown in FIGS. 4 and 5 , both the third flow channel 35 and the fifth flow channel 52 are annular flow channels, that is, the cross sections of the third flow channel 35 and the fifth flow channel 52 can both be circular. Ring type, in which the third flow channel 35 surrounds the outer peripheral side of the second flow channel 34 and the fifth flow channel 52 surrounds the outer peripheral side of the fourth flow channel 51 . Therefore, on the one hand, the internal space of the rod body 31 and the drill pipe 5 can be fully utilized, thereby ensuring the flow rate of the liquid, and on the other hand, the relatively independent arrangement of the flow channels can be achieved.

In some embodiments, the first hole sealer 1 and the jet 2, the jet 2 and the second hole sealer 3, and the second hole sealer 3 and the drill pipe 5 are detachably connected. . For example, the first hole sealer 1 and the jet 2, the jet 2 and the second hole sealer 3, and the second hole sealer 3 and the drill pipe 5 can all be threaded. This not only ensures the sealing of the connection, but also ensures the structural strength of the connection and the convenience of installation and disassembly.

In some embodiments, the connecting tube 4 is a resin tube. As a result, the connecting pipe 4 has certain elastic deformation performance, which provides convenience for laying the connecting pipe 4 . In some other embodiments, the connecting pipe 4 can also be a metal pipe, a rubber pipe, etc.

It should be noted that the first hole sealing device 1 and the second hole sealing device 3 may both be provided with connection ports, and the connection pipe 4 may be connected and fixed with the corresponding connection port, thereby facilitating the installation and arrangement of the connection pipe 4.

In some embodiments, the injector 2 is provided with a slot, the slot extends along the axial direction of the injector 2, and the connecting pipe 4 is embedded in the slot. For example, the slot can be integrally formed on the outer wall of the injector 2, and the slot can penetrate the injector 2 in the front-to-back direction. When in use, a part of the connecting pipe 4 can be embedded in the slot, so that the connecting pipe 4 can be connected. The installation and fixation ensure the structural stability of the connecting pipe 4.

In some embodiments, as shown in FIG. 4 , the valve group 32 includes a sliding member 321 and an elastic member 322 . The sliding member 321 is slidably assembled on the outer peripheral side of the rod body 31 . When the sliding member 321 slides forward and backward, the sliding member 321 slides forward and backward. 321 has a blocking position and an unblocking position. In the blocking position, the sliding member 321 blocks the fracturing hole 36. In the unblocking position, the sliding member 321 releases the blocking of the fracturing hole 36.

The elastic member 322 is connected to the sliding member 321 and is used to exert force on the sliding member 321. When the first liquid is introduced into the third flow channel 35, the hydraulic pressure of the first liquid is small and the hydraulic effect of the first liquid is insufficient. Overcoming the elastic force of the elastic member 322, the sliding member 321 can be maintained in the blocking position under the elastic force of the elastic member 322. At this time, the first liquid in the second bladder 33 can be connected through the third flow channel 35. The tube 4 flows directly into the first bladder 11 .

When the second liquid is introduced into the third flow channel 35, the hydraulic pressure of the second liquid is relatively large, and the hydraulic pressure of the second liquid can overcome the elastic force exerted by the elastic member 322. The sliding member 321 is under the pressure of the second liquid. It can move from the blocking position to the unblocking position under the action, so that the blocking of the fracturing hole 36 can be released, and the second liquid flowing through the third flow channel 35 can directly flow out from the fracturing hole 36, so that fracturing can be realized. Operation.

In some embodiments, as shown in FIG. 4 , a first stopper 311 and a second stopper 312 are provided on the outer peripheral side of the rod body 31 . The first stopper 311 and the second stopper 312 can be integrally formed on On the outer peripheral side of the rod body 31, the first stopper 311 and the second stopper 312 may be arranged at intervals in the front-rear direction.

The sliding member 321, the elastic member 322, and the fracturing hole 36 are all located between the first stop part 311 and the second stop part 312. One end of the elastic member 322 is in contact with the first stop part 311 and the second stop part 312. One of them is connected, and the other end of the elastic member 322 is connected with the sliding member 321 . For example, the first stop portion 311 can be provided on the front side of the second stop portion 312 , the front end of the elastic member 322 can be connected and fixed with or against the first stop portion 311 , and the rear end of the elastic member 322 can be connected to the sliding member. 321 connection is fixed or stopped.

The first stop part 311 and the second stop part 312 play a role in constraining the telescopic stroke and installation position of the elastic member 322. Secondly, through the stop and limit of the second stop part 312 and the sliding member 321, it is also ensured that The sliding member 321 seals the fracturing hole 36 accurately.

Optionally, as shown in FIG. 4 , the elastic member 322 is a spring, and the spring is sleeved on the outer peripheral side of the rod body 31 . The sliding member 321 is annular and is sleeved on the outer peripheral side of the rod body 31 .

In some embodiments, the hydraulic pressure of the first liquid is 0-10MPa; the hydraulic pressure of the second liquid is 10-60MPa.

In some embodiments, as shown in Figure 2, the first hole sealer 1 may be provided with an inner channel 12. When in use, the front end of the first hole sealer 1 may be connected to a drill bit, and the inner channel 12 may be connected to the first flow channel. The front end of the drill pipe 21 is connected, and the liquid introduced through the fourth flow channel 51 of the drill pipe 5 can flow to the drill bit through the inner channel 12, etc., thereby meeting the need to provide liquid to the drill bit for drilling operations.

It should be noted that during the drilling process, the inner channel 12 can be connected with the first flow channel 21, and in the subsequent hole expansion stage, the inner channel 12 can be blocked, thereby meeting the need for the nozzle 22 to spray abrasive fluid. .

In some embodiments, the injector 2 includes an injector body, a first joint, a second joint and a plurality of elastomers.

A flow channel and a plurality of nozzles 22 are provided in the main body of the jet. The plurality of nozzles 22 are all connected with the flow channel, and the injection directions of at least two nozzles 22 form an included angle in the circumferential direction of the main body of the jet. For example, the ejector body may include a conduit extending generally in a left-to-right direction, and a flow channel may be formed within the conduit.

There may be two nozzles 22, and the two nozzles 22 may both be assembled on the pipeline and may be spaced apart along the left and right directions, and the two nozzles 22 may be offset along the circumferential direction of the jet body, whereby the two nozzles 22 may be Each nozzle 22 can spray high-pressure frosting water in different directions, so that two slits can be cut at the same time.

In other embodiments, there may be three, four, etc. nozzles 22. At this time, each nozzle 22 may face different directions. In other embodiments, the spray directions of some nozzles 22 may also be the same, so that The cutting quality of the same seam can be guaranteed.

The main body of the jet is connected between the first joint and the second joint, and one of the first joint and the second joint is provided with a liquid inlet, and the liquid inlet is connected with the flow channel. For example, the first joint can be fixed on the left end of the ejector body, and the second joint can be fixed on the right end of the ejector body. The liquid inlet hole can be provided in the first joint, the liquid inlet hole can extend along the central axis of the first joint, and when the first joint is assembled on the ejector body, the liquid inlet hole can be directly connected to the flow channel.

When in use, the first joint can be connected to the drill pipe 5, and the second joint can be connected to the drill bit. Through the channel in the drill pipe 5, high-pressure grinding water, etc. can be passed into the liquid inlet hole. The high-pressure grinding water flows through the liquid inlet hole. Then it will flow to each nozzle 22 through the flow channel, and finally it can be sprayed out from each nozzle 22, so that the cutting operation can be realized.

A plurality of elastomers are arranged at intervals along the circumference of the jet body. Each nozzle 22 is exposed from the gap between two adjacent elastomers. One end of each elastomer is connected to the first joint. The other end is connected to the second joint, and the outer wall surface of each elastic body is used to elastically stop against the hole wall of the drilled hole to prevent the injector 2 from rotating and fitting in the drilled hole.

For example, the elastomer may be in the shape of an elastic piece, and four elastomers may be provided. It is understood that in other embodiments, the elastomer may also be provided with two, three, five, six, etc. numbers. The four elastomers can be arranged at equal intervals along the circumferential direction of the jet body. The left end of each elastic body can be connected and fixed with the outer peripheral wall of the first joint, and the right end of each elastic body can be connected and fixed with the outer peripheral wall of the second joint. The outlet of each nozzle 22 can be located in the gap area between the two elastic bodies, thereby avoiding the situation where the elastic bodies block the nozzles 22 .

The elastomer can be processed and formed from materials with high strength, high toughness, and high wear resistance. For example, the elastomer can be a high-strength steel sheet. When the injector 2 is placed into the drill hole, since the diameter of the part formed by the multiple elastic bodies is slightly larger than the diameter of the drill hole in the top plate, when the injector 2 moves up and down along the drill hole, the elastomers will be squeezed toward The inward shrinkage facilitates the placement of the jet 2 into the drill hole.

The following describes the capping method according to the embodiment of the present invention.

The capping method according to the embodiment of the present invention includes the following steps:

S1: Transport the abrasive fluid into the fourth flow channel 51 of the drill pipe 5 and move the capping device up and down along the extending direction of the drill hole to achieve jet cutting of the hole wall of the drill hole.

S2: Transport the first liquid into the fifth flow channel 52 of the drill pipe 5 .

S3: After the first bladder 11 and the second bladder 33 are inflated and the sealing section is limited between the first bladder 11 and the second bladder 33, gradually increase the hydraulic pressure of the first liquid to switch the first liquid. as the second liquid.

S4: Use the second liquid to complete directional fracturing of the jet slit in the sealing section.

S5: Withdraw the capping device from the drilling hole or move the position of the capping device to perform cutting and fracturing of the next hole sealing section.

The following describes a capping method of a specific example of the present invention.

Step 1): Provide high-pressure abrasive water to the fourth flow channel 51 of the drill pipe 5 through the high-pressure pump unit outside the hole, the grinding tank, the drill pipe 5 transportation device, and the supporting pipelines, and the abrasive water passes through the fourth flow channel 51 of the drill pipe 5 in sequence. , the second flow channel 34 of the lower hole sealer (can be regarded as the second hole sealer 3), the first flow channel 21 of the jet 2 flows to each nozzle 22 and is ejected from the nozzle 22, and then is pushed by the drill pipe 5 conveying device The drill pipe 5 moves up and down, and the jet formed by the abrasive water ejected from the nozzle 22 can achieve jet cutting on the hole wall.

Step 2): After completing the cutting of the drill hole, provide low-pressure clean water (can be regarded as the first liquid) to the fifth flow channel 52 of the drill pipe 5 through the high-pressure pump unit outside the hole, the drill pipe 5 conveying device, and supporting pipelines. The clean water sequentially passes through the fifth flow channel 52 of the drill pipe 5, the third flow channel 35 of the lower hole sealer, the high-pressure resin pipe (can be regarded as the connecting pipe 4), and the upper hole sealer (can be regarded as the first hole sealer 1 ), the low-pressure water introduced can cause the lower sealing device capsule (second capsule 33) and the upper sealing device capsule (first capsule 11) to expand and squeeze the hole wall, thereby sealing the holes at both ends and forming Sealing section.

Step 3): After sealing the hole, operate the pump unit to slowly increase the pump pressure. As the pressure increases, the low-pressure clean water will form high-pressure clean water, and the slider (can be regarded as the slider 321) in the fracturing controller moves toward the ejector 2 direction. , and compress the spring (elastic member 322) at the same time. When the water pressure reaches a certain value, the fracturing hole 36 is exposed. At this time, high-pressure clean water is sprayed out from the fracturing hole 36, which increases the pressure in the sealing section of the borehole and causes The prefabricated cracks formed by low-pressure clean water jet cutting expand along the depth direction to achieve the purpose of directional fracturing.

Step 4): After completing this section of fracturing, turn off the external high-pressure pump unit, the pressure of the liquid decreases, the slider recovers under the push of the spring, the lower sealing device capsule and the upper sealing device capsule shrink and separate from the hole wall, and then The drill pipe 5 pushing device can be operated to withdraw the drill pipe 5 or carry out the construction of the next section.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the referred devices or components. Must have a specific orientation, be constructed and operate in a specific orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected, electrically connected or communicable with each other; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, Unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the present disclosure, the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" etc. mean the specific features, structures, materials or materials described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the above embodiments have been shown and described, it can be understood that the above embodiments are illustrative and should not be construed as limitations of the present invention. Changes, modifications, substitutions and modifications of the above embodiments may be made by those of ordinary skill in the art. All are within the protection scope of the present invention.

Claims (10)

1. A roof frosted jet fracturing and roofing device, which is characterized in that it includes: A first hole sealing device, a first capsule is provided on the outer peripheral side of the first hole sealing device; A jet device, one end of the jet device is connected to the first hole sealer, the jet device is provided with a first flow channel and a nozzle, and the nozzle is connected to the first flow channel; A second hole sealing device, the second hole sealing device is connected to the other end of the jet, the second hole sealing device includes a rod body, a valve group and a second bag body, the rod body is provided with a second flow channel , the third flow channel and the fracturing hole, the second flow channel is connected to the first flow channel, the fracturing hole is connected to the third flow channel; the valve group is provided on the rod body, the The valve group blocks the fracturing hole when the first liquid is introduced into the third flow channel, and releases the blocking of the fracturing hole when the second liquid is introduced into the third flow channel, and the valve group The hydraulic pressure of the first liquid is smaller than the hydraulic pressure of the second liquid; the second bladder is provided on the outer peripheral side of the rod and communicates with the third flow channel; the fracturing hole is located between the injector and the between the second capsule; A connecting tube, the connecting tube is connected between the first flow channel and the third flow channel to connect the first bladder and the third fluid when the first liquid is introduced into the second bladder. The two balloons are expandable and define a sealing section between the first balloon and the second balloon; Drill pipe, the drill pipe has a fourth flow channel and a fifth flow channel, the fourth flow channel is connected to the second flow channel, and the second bladder is connected to the fifth flow channel and the between the third flow channel. 2. The roof frosted jet fracturing and capping device according to claim 1, wherein the third flow channel and the fifth flow channel are annular flow channels, and the third flow channel surrounds the surrounding area. The fifth flow channel surrounds the outer peripheral side of the second flow channel, and the fifth flow channel surrounds the outer peripheral side of the fourth flow channel. 3. The roof frosted jet fracturing and capping device according to claim 1, characterized in that between the first hole sealing device and the jet device, between the jet device and the second hole sealing device The second sealing device and the drill pipe are all detachably connected. 4. The roof frosted jet fracturing and capping device according to claim 3, characterized in that between the first hole sealing device and the jet device, between the jet device and the second hole sealing device There is a threaded connection between the second hole sealing device and the drill pipe; And/or, the connecting pipe is a resin pipe. 5. The roof frosted jet fracturing and capping device according to claim 1, wherein the jet is provided with a slot, the slot extends along the axial direction of the jet, and the connection The tube is embedded in the slot. 6. The roof frosted jet fracturing and capping device according to claim 1, wherein the valve group includes: The sliding member is slidably assembled on the outer peripheral side of the rod body and has a blocking position and an unblocking position. In the blocking position, the sliding member blocks the fracturing hole, and in the unblocking position position, the sliding member releases the blocking of the fracturing hole; An elastic member is connected to the sliding member and is used to apply force to the sliding member so that the sliding member can be maintained in the first liquid when the third flow channel is passed into the first liquid. The blocking position, and when the second liquid is introduced into the third flow channel, the hydraulic effect of the second liquid can overcome the force exerted by the elastic member so that the sliding member can switch to the desired position. Describe the unblocking position. 7. The roof frosted jet fracturing and capping device according to claim 6, wherein a first stopper and a second stopper are provided on the outer peripheral side of the rod body, and the first stopper and The second stop portions are arranged at intervals, and the sliding member, the elastic member, and the fracturing hole are all provided between the first stop portion and the second stop portion, and the elastic member One end of the elastic member is connected to one of the first stopper and the second stopper, and the other end of the elastic member is connected to the sliding member. 8. The roof frosted jet fracturing and capping device according to claim 7, wherein the elastic member is a spring, the spring is sleeved on the outer peripheral side of the rod body, and the sliding member is annular and sleeved. Located on the outer peripheral side of the rod body. 9. The roof frosted jet fracturing and capping device according to any one of claims 1 to 8, characterized in that the jet device includes: The main body of the ejector, the first flow channel and the nozzle are both provided on the main body of the ejector; a first joint and a second joint, the ejector body is connected between the first joint and the second joint, and one of the first joint and the second joint is provided with a liquid inlet hole , the liquid inlet hole is connected with the first flow channel; A plurality of elastic bodies are arranged at intervals along the circumference of the jet body, and each nozzle is exposed from the interval between two adjacent elastic bodies. Each elastic body is One end of the body is connected to the first joint, the other end of each elastic body is connected to the second joint, and the outer wall surface of each elastic body is used to elastically stop against the hole wall of the drilled hole. Make the jet stop to fit in the drill hole. 10. A capping method based on the roof frosted jet fracturing capping device according to any one of claims 1 to 9, characterized in that it includes the following steps: S1: Transport abrasive fluid into the fourth flow channel of the drill pipe and move the capping device up and down along the extending direction of the drilled hole to achieve jet cutting of the hole wall of the drilled hole; S2: Transport the first liquid into the fifth flow channel of the drill pipe; S3: After the first bladder and the second bladder are inflated and a sealing section is limited between the first bladder and the second bladder, gradually increase the hydraulic pressure of the first liquid. To switch the first liquid to the second liquid; S4: Use the second liquid to complete directional fracturing of the jet slit in the sealing section; S5: Withdraw the capping device from the drilling hole or move the position of the capping device to perform cutting and fracturing of the next hole sealing section.