Deep hole fracturing hole packer

Abstract

The utility model discloses a deep hole fracturing hole packer which is characterized in that the left side and the right side of a middle connecting pipe are respectively connected with an expansion pipe, internal sliding rods are arranged in the two expansion pipes, and the two expansion pipes can respectively contract and expand on the internal sliding rods; a guide head is arranged on at least one of the expansion pipe and the middle connecting pipe, and the diameter of the guide head is larger than that of any part of the deep hole fracturing hole packer; when the deep hole fracturing hole packer stretches into a deep hole, extension guiding of the whole deep hole fracturing hole packer is achieved through the guiding head, due to the fact that the diameter of the deep hole fracturing hole packer is the largest, blockage caused by scratching of the expansion pipe and the inner wall of the deep hole can be prevented, and the deep well with the depth larger than 200 m can be effectively fractured when the deep hole fracturing hole packer is used in cooperation with the through hole in the middle connecting pipe and the one-way pressure valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining accessories, in particular to a deep hole fracturing sealer. Background Art

[0002] Among the existing mining accessories, the traditional way to extend the tunnel is to use blasting. However, in the field of coal mining or other fuel ore mining, underground ores are rich in a large amount of flammable and explosive gases, which can easily lead to safety accidents in a blasting environment.

[0003] The applicant has developed a fracturing sealer based on the existing fracturing device. When in use, the fracturing sealer is inserted as a whole into a prefabricated hole, and the minerals in the hole are fractured by high-pressure liquid. The working principle is that two expansion tubes are arranged at both ends of the middle connecting tube. When the pressure is supplied, the expansion tube is expanded and sealed, and then high-pressure fracturing is achieved between the two expansion tubes, thereby achieving fracturing operation. However, the above operation method is to directly rub the expansion tube against the hole wall. When inserted into the hole, it cannot enter a deeper hole due to friction resistance. Therefore, the fracturing sealer of this structure is only suitable for shallow holes within 200.

[0004] In view of the current actual needs, it is very necessary to develop and design a fracturing sealer suitable for deep hole operations based on the shallow hole sealer to make up for the shortcomings of the current technology in this field. Utility Model Content

[0005] The utility model aims to provide a deep hole fracturing sealer, which draws on the working principle of current shallow hole expansion fracturing and can realize the fracturing operation of minerals in a deep hole operation environment.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a deep hole fracturing sealer, which includes a middle connecting pipe, and the left and right sides of the middle connecting pipe are respectively connected to an expansion pipe, and the two expansion pipes are both provided with internal sliding rods, and the internal sliding rods are provided with seepage holes, and the two expansion pipes can shrink and expand on the internal sliding rods respectively; at least one of the expansion pipe and the middle connecting pipe is provided with a guide head, and the diameter of the guide head is greater than the diameter of any part of the deep hole fracturing sealer;

[0007] One of the two expansion tubes is of closed end type, and the end of the other expansion tube is provided with an external connection end; a through hole is provided inside the middle connecting tube to realize the interconnection between the two expansion tubes; a one-way pressure valve is provided inside the middle connecting tube, and the conducting part of the one-way pressure valve is provided with an external through hole to realize the interconnection between the middle connecting tube and the outside.

[0008] The expansion tube is of single-end fixed type, and its fixed end is fixed by an external clamp and an internal plug-in expansion core.

[0009] A sealing sleeve is provided between the expansion tube and the internal slide rod, and the sealing sleeve is used to achieve sliding cooperation with the internal slide rod.

[0010] The left and right ends of the middle connecting pipe are respectively provided with threaded connecting ends for realizing the connection of the expansion pipe.

[0011] The one-way pressure valve includes a blind hole arranged in the middle connecting pipe, the blind hole is opened toward the liquid supply side and is provided with a through plug, an elastic component is arranged in the blind hole, a through plug is arranged at the opening of the blind hole to realize the squeezing of the blocking component and the elastic component, an external through hole is arranged on the side wall of the middle connecting pipe, the liquid enters the blind hole through the through plug and squeezes the blocking component, and the blocking component overcomes the pressure of the elastic component to realize the conduction between the external through hole and the blind hole.

[0012] The beneficial effects of the utility model are as follows: through the above design, the utility model has an expansion tube connected to the left and right sides of the middle connecting tube respectively, and the two expansion tubes are provided with internal sliding rods inside, and the two expansion tubes can shrink and expand respectively on the internal sliding rods; at least one of the expansion tube and the middle connecting tube is provided with a guide head, and the diameter of the guide head is larger than the diameter of any part of the deep hole fracturing sealer; when the device is probed into the deep hole, the extension and guidance of the entire deep hole fracturing sealer is achieved through the guide head, because its diameter is the largest, it can prevent the expansion tube from scratching the inner wall of the deep hole to cause blockage, and it is used in conjunction with the through hole inside the middle connecting tube and the one-way pressure valve, and can effectively fractur e deep wells with a depth greater than 200 meters.

[0013] The device has a simple and novel structure and is easy to use. It can effectively realize deep hole fracturing operations, reduce operation risks, and improve operation efficiency. It is an ideal deep hole fracturing sealer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the main internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0018] Figure numerals: 1. external connecting head, 2. first clamp, 3. first expansion tube, 4. first sealing sleeve, 41. sealing fixed end, 42. first tightening surface, 5. connecting piece, 51. middle plug-in expansion core, 6. middle connecting tube, 61. internal threaded connecting end, 62. through hole, 63. external through hole, 64. through plug, 65. sealing ball, 66. spring, 7. second clamp, 8. second expansion tube, 9. end guide head, 10. second tightening surface, 11. external threaded connecting end, 12. first plug-in expansion core, 13. internal slide rod, 14. seepage hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] A deep hole fracturing sealer, as shown in the accompanying drawings, comprises a middle connecting pipe 6, the left and right ends of the middle connecting pipe 6 are respectively provided with internal threaded connecting ends 61 for connecting expansion pipes, the expansion pipes include a first expansion pipe 3 and a second expansion pipe 8, both expansion pipes are provided with internal sliding rods 13, the internal sliding rods 13 are fixed, such as Figure 2 As shown, the internal slide bar 13 is installed and welded together inside the first expansion tube 3 through the external connector 1 and the connector 5 (on the left side of the middle connection tube 6), and the internal slide bar 13 is installed and welded together inside the second expansion tube 8 through the connector 5 (on the right side of the middle connection tube 6) and the end guide head 9. The internal slide bar 13 is provided with a seepage hole 14, and the two expansion tubes can shrink and expand on the internal slide bar 13 respectively. One end of the second expansion tube 8 is connected to the middle connection tube 6 through the connector 5. When fixed, the middle plug-in 51 and the second clamp 7 cooperate to realize the stirrup of the second expansion tube 8; the other end is slidably fixed on the internal slide bar 13 through the second tightening surface 10 and the end guide head 9. A sealing ring is provided between the end guide head 9 and the internal slide bar 13 for sealing when the two slide laterally. One end of the first expansion tube 3 is connected to the external connector 1, and the external connector 1 is provided with a first plug-in expansion core 12 and an external threaded connection end 11. The first expansion tube 3 is fixed by the first plug-in expansion core 12 and the first clamp 2, and the external threaded connection end 12 is connected to the external liquid supply device; the other end of the first expansion tube 3 is fixed by the connector 5 and the first sealing sleeve 4 on the connector 5. The first sealing sleeve 4 is provided with a sealing fixed end 41 and a first tightening surface 42, and the sliding connection between the first expansion tube 3 and the internal slide rod 13 is achieved through the two cooperations. Through the above structural setting, when the device is in use, by setting the diameter of the external connector 1, the connector 5, and the end guide head 9 to be larger than the outer diameter of the expansion tube, it can realize the guidance of the entire deep hole fracturing sealer when moving in the deep hole, and prevent the outer wall of the expansion tube from rubbing against the inner wall of the deep hole, which plays a good role in protecting the expansion tube.

[0021] When the device realizes the connection between the expansion tube and the middle connecting tube 6, as shown in the attached figure, the left and right ends of the middle connecting tube 6 are respectively connected to a connecting piece 5 through an internal threaded connecting end 61, and the connection with the two expansion tubes is realized through the connecting piece 5; a through hole 62 is provided inside the middle connecting tube 6 to realize the interconnection between the first expansion tube 3 and the second expansion tube 8; a one-way pressure valve is provided inside the middle connecting tube 6, and the conducting part of the one-way pressure valve is provided with an external through hole to realize the interconnection between the middle connecting tube and the outside.

[0022] The utility model discloses a one-way pressure valve which is relatively simple to process on the basis of the above structure. The one-way pressure valve can be directly formed inside the middle connecting tube 6. The structure is described as follows: it comprises a blind hole arranged inside the middle connecting tube 6. The blind hole is provided with a through plug 64 on the opening facing the liquid supply side. The through plug is actually a nut with a transparent center, which is threadedly fixed in the blind hole. A spring 66 is arranged in the blind hole. The through plug 64 arranged at the opening of the blind hole realizes the squeezing of the sealing ball 65 and the spring 66. An external through hole 63 is arranged on the side wall of the middle connecting tube 6. The liquid enters the blind hole through the through plug 64 and squeezes the sealing ball 65. The sealing ball 65 overcomes the pressure of the spring 66 to realize the conduction between the external through hole 63 and the blind hole.

[0023] When the utility model is in use, the left and right sides of the middle connecting tube 6 are respectively connected with the first expansion tube 3 and the second expansion tube 8, and the middle connecting tube 6 is provided with a through hole 62 inside to realize the interconnection between the two expansion tubes; the middle connecting tube 6 is provided with a one-way pressure valve inside, and the conducting part of the one-way pressure valve is provided with an external through hole 63 to realize the interconnection between the middle connecting tube 6 and the outside. The conducting part mentioned here is any area in the inner side wall of the blind hole. Only when the blocking ball 65 is caused to shift under a certain pressure can the external through hole 63 be connected with the blind hole. The size of the above-mentioned pressure value can be adjusted by the set position of the external through hole 63.

[0024] After supplying pressure to the first expansion tube 3 and the second expansion tube 8, the two expansion tubes expand by sliding on the internal slide rod 13 at one end, and then fit against the inner wall of the deep hole. At this time, continued pressurization causes the one-way pressure valve to be turned on, and the liquid enters the area between the two expansion tubes through the external through hole 63 to achieve fracturing. The utility model provides an internal slide rod 13 to facilitate external force to drive the entire deep hole fracturing sealer to move in the deep hole, and then provides an external connector 1, a connector 5, and an end guide head 9 to achieve plug-in protection for the expansion tube in the deep hole. In addition, by providing a seepage hole 14 on the internal slide rod 13, the two expansion tubes can shrink and expand on the internal slide rod 13 respectively to achieve sealing before fracturing.

Claims

1. A deep hole fracturing sealer, characterized in that: It includes a middle connecting pipe, and an expansion pipe is connected to the left and right sides of the middle connecting pipe respectively. Internal sliding rods are arranged inside the two expansion pipes, and seepage holes are arranged on the internal sliding rods. The two expansion pipes can shrink and expand respectively on the internal sliding rods; at least one of the expansion pipe and the middle connecting pipe is provided with a guide head, and the diameter of the guide head is larger than the diameter of any part of the deep hole fracturing sealer; a through hole is arranged inside the middle connecting pipe to realize the interconnection between the two expansion pipes; a one-way pressure valve is arranged inside the middle connecting pipe, and the conducting part of the one-way pressure valve is provided with an external through hole to realize the interconnection between the middle connecting pipe and the outside.

2. The deep hole fracturing sealer according to claim 1, characterized in that: The expansion tube is of single-end fixed type.

3. The deep hole fracturing sealer according to claim 1, characterized in that: A sealing sleeve is arranged between the expansion tube and the internal slide rod.

4. The deep hole fracturing sealer according to claim 1, characterized in that: The left and right ends of the middle connecting pipe are respectively provided with threaded connecting ends.

5. The deep hole fracturing sealer according to claim 1, characterized in that: The one-way pressure valve includes a blind hole arranged in the middle connecting pipe, a through plug is arranged on the opening of the blind hole facing the liquid supply side, an elastic component is arranged in the blind hole, a through plug is arranged at the opening of the blind hole to realize the extrusion of the sealing component and the elastic component, an external through hole is arranged on the side wall of the middle connecting pipe, and the liquid enters the blind hole through the through plug to squeeze the sealing component.

Images