CA3064815C - Self-carrying abrasive type hydraulic slotting drill bit - Google Patents
Self-carrying abrasive type hydraulic slotting drill bit Download PDFInfo
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- CA3064815C CA3064815C CA3064815A CA3064815A CA3064815C CA 3064815 C CA3064815 C CA 3064815C CA 3064815 A CA3064815 A CA 3064815A CA 3064815 A CA3064815 A CA 3064815A CA 3064815 C CA3064815 C CA 3064815C
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- sand
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 266
- 239000004576 sand Substances 0.000 claims abstract description 80
- 238000005520 cutting process Methods 0.000 claims abstract description 46
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 10
- 239000011435 rock Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 244000035744 Hura crepitans Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
A self-carrying abrasive type hydraulic slotting drill bit comprises a drill bit and cutting heads installed on the periphery of the top of the drill bit, the drill bit is composed of a drill bit outer wall and a drill bit cavity, and a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity.
Description
%
a.
SELF-CARRYING ABRASIVE TYPE HYDRAULIC SLOTTING DRILL
BIT
FIELD OF THE INVENTION
[0001] The present invention relates to a hydraulic slotting drill bit, and in particular to a self-carrying abrasive type hydraulic slotting drill bit, belonging to the technical field of mining engineering.
DESCRIPTION OF RELATED ART
100021 Hydraulic fracturing technology was first applied to petroleum engineering to increase the production of lean oil wells. At present, the hydraulic fracturing technology has been promoted and applied in the aspects of hard roof control of coal mines, submarine tunnel engineering, hard top coal weakening, rock fracturing, coal bed methane mining, and the like.
Generally, the initiation and propagation of a hydraulic fracture are controlled by the ground stress field of drilled surrounding rock, and the fracture initiation and propagation plane is parallel to the direction of maximum principal stress. However, the fracture propagation direction required in many projects does not coincide with the fracture direction controlled by the ground stress field, and artificial measures are required to control the directional initiation of the fracture and guide the propagation direction of the fracture, that is, directional hydraulic fracturing.
100031 The most common method of the directional hydraulic fracturing is to cut a fracture in a specific direction with high pressure water jet on a drilled wall to guide the hydraulic fracture to propagate in the cutting direction so as to achieve the effect of directional fracturing. On the ground, the high pressure water jet is widely used, wherein a water jet scalpel is a common cutting technology using the high pressure water jet. The water jet scalpel is a cutting tool using water as a scalpel. This technology originated in the United States and was used in the aerospace military industry. It is favored for its cold cutting without changing the physical and chemical properties of a material. After continuous improvement of the technology, garnet sand is mixed in high pressure water, which greatly improves the cutting speed and cutting thickness of the water jet scalpel.
i =
=
[0004] At present, the sand-carrying cutting with water jet scalpels is widely applied on the ground, but requires a large space. Although the hydraulic fracturing has been applied to mines for a long time, the internal space of a drill hole is restricted by the diameter of the drill hole, when hydraulic slotting is carried out inside the drill hole, almost no sand is carried, and only high energy impact of high pressure water is used to break the coal rock.
Consequently, the efficiency is low, the fracture depth caused by the impact is insufficient, and the directional effect of the directional hydraulic fracturing is poor; secondly, short nozzles of a conventional hydraulic slotting drill bit are arranged on a concentric circle, and the high pressure water cannot accumulate enough energy in the nozzles and is insufficient in energy when being ejected from the drill bit to limit the destruction to the coal and rock mass, so that the slotting depth is insufficient, the directional fracturing effect is poor, and the engineering problems such as directional cutting of a hard roof cannot be thoroughly solved.
100051 It is well known that the cutting speed and cutting radius of the sand-carrying water jet is much higher than those of the sand-free water jet. There are two ways to produce sand-carrying high pressure water jet: the first one is pre-mixing, that is, after high pressure water and abrasive (sand) are mixed, the water-sand mixture passes through a high pressure pipeline to reach nozzles and is directly ejected by the nozzles to cut a material; the second one is post-mixing, where after sand in a sandbox is sucked into nozzles by using the siphon phenomenon generated by high pressure water at the nozzles, and mixed with the high pressure water, the mixture is ejected by the nozzles to cut a corresponding material. The water-sand mixture produced by the pre-mixing seriously wears the high pressure pipeline along the way, and the nozzles are easily blocked by the sand. Consequently, the conventional hydraulic slotting drill bit is rarely used; and the post-mixing requires a large space to complete, and the conventional hydraulic slotting drill bit does not have such a condition and cannot realize such a function.
SUMMARY OF THE INVENTION
Technical Problem [0006] To overcome the existing deficiencies, the present invention provides a self-carrying abrasive type hydraulic slotting drill bit. The drill bit can greatly improve the cutting capability of water jet, the cutting capability is remarkably improved, the cutting speed is also greatly improved, more energy is obtained by the high pressure water jet, the slotting range is increased, and the directional fracturing effect of a drill hole is better, so that the quantity of drill holes
a.
SELF-CARRYING ABRASIVE TYPE HYDRAULIC SLOTTING DRILL
BIT
FIELD OF THE INVENTION
[0001] The present invention relates to a hydraulic slotting drill bit, and in particular to a self-carrying abrasive type hydraulic slotting drill bit, belonging to the technical field of mining engineering.
DESCRIPTION OF RELATED ART
100021 Hydraulic fracturing technology was first applied to petroleum engineering to increase the production of lean oil wells. At present, the hydraulic fracturing technology has been promoted and applied in the aspects of hard roof control of coal mines, submarine tunnel engineering, hard top coal weakening, rock fracturing, coal bed methane mining, and the like.
Generally, the initiation and propagation of a hydraulic fracture are controlled by the ground stress field of drilled surrounding rock, and the fracture initiation and propagation plane is parallel to the direction of maximum principal stress. However, the fracture propagation direction required in many projects does not coincide with the fracture direction controlled by the ground stress field, and artificial measures are required to control the directional initiation of the fracture and guide the propagation direction of the fracture, that is, directional hydraulic fracturing.
100031 The most common method of the directional hydraulic fracturing is to cut a fracture in a specific direction with high pressure water jet on a drilled wall to guide the hydraulic fracture to propagate in the cutting direction so as to achieve the effect of directional fracturing. On the ground, the high pressure water jet is widely used, wherein a water jet scalpel is a common cutting technology using the high pressure water jet. The water jet scalpel is a cutting tool using water as a scalpel. This technology originated in the United States and was used in the aerospace military industry. It is favored for its cold cutting without changing the physical and chemical properties of a material. After continuous improvement of the technology, garnet sand is mixed in high pressure water, which greatly improves the cutting speed and cutting thickness of the water jet scalpel.
i =
=
[0004] At present, the sand-carrying cutting with water jet scalpels is widely applied on the ground, but requires a large space. Although the hydraulic fracturing has been applied to mines for a long time, the internal space of a drill hole is restricted by the diameter of the drill hole, when hydraulic slotting is carried out inside the drill hole, almost no sand is carried, and only high energy impact of high pressure water is used to break the coal rock.
Consequently, the efficiency is low, the fracture depth caused by the impact is insufficient, and the directional effect of the directional hydraulic fracturing is poor; secondly, short nozzles of a conventional hydraulic slotting drill bit are arranged on a concentric circle, and the high pressure water cannot accumulate enough energy in the nozzles and is insufficient in energy when being ejected from the drill bit to limit the destruction to the coal and rock mass, so that the slotting depth is insufficient, the directional fracturing effect is poor, and the engineering problems such as directional cutting of a hard roof cannot be thoroughly solved.
100051 It is well known that the cutting speed and cutting radius of the sand-carrying water jet is much higher than those of the sand-free water jet. There are two ways to produce sand-carrying high pressure water jet: the first one is pre-mixing, that is, after high pressure water and abrasive (sand) are mixed, the water-sand mixture passes through a high pressure pipeline to reach nozzles and is directly ejected by the nozzles to cut a material; the second one is post-mixing, where after sand in a sandbox is sucked into nozzles by using the siphon phenomenon generated by high pressure water at the nozzles, and mixed with the high pressure water, the mixture is ejected by the nozzles to cut a corresponding material. The water-sand mixture produced by the pre-mixing seriously wears the high pressure pipeline along the way, and the nozzles are easily blocked by the sand. Consequently, the conventional hydraulic slotting drill bit is rarely used; and the post-mixing requires a large space to complete, and the conventional hydraulic slotting drill bit does not have such a condition and cannot realize such a function.
SUMMARY OF THE INVENTION
Technical Problem [0006] To overcome the existing deficiencies, the present invention provides a self-carrying abrasive type hydraulic slotting drill bit. The drill bit can greatly improve the cutting capability of water jet, the cutting capability is remarkably improved, the cutting speed is also greatly improved, more energy is obtained by the high pressure water jet, the slotting range is increased, and the directional fracturing effect of a drill hole is better, so that the quantity of drill holes
2 =
=
arranged on a working face is reduced, and the cost is lowered.
Technical Solution [0007] The technical solution adopted by the present invention is as follows.
A self-carrying abrasive type hydraulic slotting drill bit includes a drill bit and cutting heads installed on the periphery of the top of the drill bit, the drill bit is composed of a drill bit outer wall and a drill bit cavity, and a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity; a water flow channel is formed in the center of the bottom of the drill bit; two low pressure water channels connecting from the water flow channel to the top of the drill bit constitute the low pressure cooling water flow system, and the two low pressure water channels are arranged symmetrically with the center line of the water flow channel as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, two eccentric high pressure water pipes connecting from the water flow channel to the drill bit outer wall constitute the high pressure cutting water flow system, the eccentric directions of the two eccentric high pressure water pipes are opposite, two high pressure water inlets are identical in height, and two high pressure water outlets are high and low respectively; the high pressure water inlets are above low pressure water inlets, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
the high pressure water-sand mixture production and abrasive adding system includes high pressure water sand-sucking channels and a sand storage box, the sand storage box is arranged above the water flow channel, and the high pressure water buffer channels are connected to the sand storage box by using the high pressure water sand-sucking channels; the high and low pressure water shunt control system includes a hole sealing baffle, a pressure control steel ball, an inner control wall and a pressure control spring, wherein the inner control wall is in contact with the drill hole inner wall of the water flow channel, the inner control wall is provided with holes corresponding to the high pressure water inlets and the low pressure water inlets in shape and position, the hole sealing baffle is arranged on the inner control wall below the low pressure water inlets, the pressure control steel ball is above the hole sealing baffle, and the pressure control spring is connected to the pressure control steel ball and the inner control wall at the
=
arranged on a working face is reduced, and the cost is lowered.
Technical Solution [0007] The technical solution adopted by the present invention is as follows.
A self-carrying abrasive type hydraulic slotting drill bit includes a drill bit and cutting heads installed on the periphery of the top of the drill bit, the drill bit is composed of a drill bit outer wall and a drill bit cavity, and a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity; a water flow channel is formed in the center of the bottom of the drill bit; two low pressure water channels connecting from the water flow channel to the top of the drill bit constitute the low pressure cooling water flow system, and the two low pressure water channels are arranged symmetrically with the center line of the water flow channel as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, two eccentric high pressure water pipes connecting from the water flow channel to the drill bit outer wall constitute the high pressure cutting water flow system, the eccentric directions of the two eccentric high pressure water pipes are opposite, two high pressure water inlets are identical in height, and two high pressure water outlets are high and low respectively; the high pressure water inlets are above low pressure water inlets, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
the high pressure water-sand mixture production and abrasive adding system includes high pressure water sand-sucking channels and a sand storage box, the sand storage box is arranged above the water flow channel, and the high pressure water buffer channels are connected to the sand storage box by using the high pressure water sand-sucking channels; the high and low pressure water shunt control system includes a hole sealing baffle, a pressure control steel ball, an inner control wall and a pressure control spring, wherein the inner control wall is in contact with the drill hole inner wall of the water flow channel, the inner control wall is provided with holes corresponding to the high pressure water inlets and the low pressure water inlets in shape and position, the hole sealing baffle is arranged on the inner control wall below the low pressure water inlets, the pressure control steel ball is above the hole sealing baffle, and the pressure control spring is connected to the pressure control steel ball and the inner control wall at the
3 =
=
top end of the water flow channel.
Advantageous Effect [0008] Compared with the prior technology, the self-carrying abrasive hydraulic slotting drill bit of the present invention has the advantages that the high pressure cutting water flow system is composed of two eccentric high pressure water pipes connecting from the water flow channel to the drill bit outer wall, thereby providing a longer water jet channel, increasing the energy of high pressure water reaching the water outlets, and improving the slotting effect; in addition, the eccentric high pressure water pipes are staggered up and down and eccentric left and right, which provides a circumferential force for the drill bit and can accelerate circumferential slotting; a sand storage box is added to provide a sand storage space, so that the cutting range and cutting speed of the high pressure water jet carrying sand are increased;
the sand-sucking channels cause the sand sucked into the high pressure water via negative pressure produced by the high pressure water, thereby achieving the effect of automatically sucking the sand; the high and low pressure water shunt control system is arranged, wherein pressure control components (a pressure control steel ball and an inner control wall) can be moved as a whole to control a conversion of high pressure water and low pressure water, wherein the pressure control steel ball can reduce the stress concentration of the high pressure water entering the high pressure water inlets and prolong the service life thereof, and the pressure control spring is connected to the pressure control components to control a relationship between the pressure and the displacement of the pressure control components so as to control the conversion of high pressure water and low pressure water; and the spatial joint arrangement of high pressure water channel and low pressure water channel improves the overall efficiency of the apparatus, and achieves reasonable use of the drill bit cavity.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The following further illustrates the present invention with reference to the accompanying drawings and embodiments.
[0010] Fig. 1 is an overlook perspective according to an embodiment of the present invention.
[0011] Fig. 2 is a cross-sectional view taken along line I-I of Fig. I.
[0012] Fig. 3 is a cross-sectional view taken along line II-II of Fig. I.
[0013] In the drawings, 1, drill bit outer wall; 2, sand supply channel; 3, sand supply hole; 41,
=
top end of the water flow channel.
Advantageous Effect [0008] Compared with the prior technology, the self-carrying abrasive hydraulic slotting drill bit of the present invention has the advantages that the high pressure cutting water flow system is composed of two eccentric high pressure water pipes connecting from the water flow channel to the drill bit outer wall, thereby providing a longer water jet channel, increasing the energy of high pressure water reaching the water outlets, and improving the slotting effect; in addition, the eccentric high pressure water pipes are staggered up and down and eccentric left and right, which provides a circumferential force for the drill bit and can accelerate circumferential slotting; a sand storage box is added to provide a sand storage space, so that the cutting range and cutting speed of the high pressure water jet carrying sand are increased;
the sand-sucking channels cause the sand sucked into the high pressure water via negative pressure produced by the high pressure water, thereby achieving the effect of automatically sucking the sand; the high and low pressure water shunt control system is arranged, wherein pressure control components (a pressure control steel ball and an inner control wall) can be moved as a whole to control a conversion of high pressure water and low pressure water, wherein the pressure control steel ball can reduce the stress concentration of the high pressure water entering the high pressure water inlets and prolong the service life thereof, and the pressure control spring is connected to the pressure control components to control a relationship between the pressure and the displacement of the pressure control components so as to control the conversion of high pressure water and low pressure water; and the spatial joint arrangement of high pressure water channel and low pressure water channel improves the overall efficiency of the apparatus, and achieves reasonable use of the drill bit cavity.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The following further illustrates the present invention with reference to the accompanying drawings and embodiments.
[0010] Fig. 1 is an overlook perspective according to an embodiment of the present invention.
[0011] Fig. 2 is a cross-sectional view taken along line I-I of Fig. I.
[0012] Fig. 3 is a cross-sectional view taken along line II-II of Fig. I.
[0013] In the drawings, 1, drill bit outer wall; 2, sand supply channel; 3, sand supply hole; 41,
4 upper high pressure water sand-sucking channel; 42, lower high pressure water sand-sucking channel; 51, upper high pressure water inlet channel; 52, lower high pressure water inlet channel; 61, upper high pressure water buffer channel; 62, lower high pressure water buffer channel; 71, upper high pressure water outlet; 72, lower high pressure water outlet; 81, upper channel nozzle; 82, lower channel nozzle; 9, sand storage box; 10, low pressure water channel;
11, pressure control spring; 12, inner control wall; 13, pressure control steel ball; 14, water flow channel; 15, hole sealing baffle; 16, total water inlet; 17, low pressure water inlet; 18, low pressure water outlet; 191, upper high pressure water inlet; 192, lower high pressure water inlet;
and 20, cutting head.
DETAILED DESCRIPTION OF THE INVENTION
[0014] In order to make the objective, technical solution and advantages of the present invention clearer, the following clearly and completely describes the technical solution in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments of the present invention.
All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
[0015] Fig. 1 to Fig. 3 are structural diagrams according to a preferred embodiment of the present invention. A self-carrying abrasive type hydraulic slotting drill bit includes a drill bit and cutting heads 20 installed on the periphery of the top of the drill bit, the cutting heads 20 are apparatuses for cutting coal mass or rock mass, the drill bit is composed of a drill bit outer wall 1 and a drill bit cavity, the drill bit outer wall 1 supports the overall shape of the drill bit, the drill bit cavity provides a working space for each internal system, and a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity.
[0016] A water flow channel 14 is formed in the center of the bottom of the drill bit, and the water flow channel 14 is formed by extending a total water inlet 16 where total water flows into the drill bit by a distance; two low pressure water channels 10 connecting from the water flow channel 14 to the top of the drill bit constitute the low pressure cooling water flow system, the low pressure water channels 10 are channels for low pressure water from the inside of the drill bit to the outside, and the two low pressure water channels 10 are arranged symmetrically with the center line of the water flow channel 14 as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, the high pressure water buffer channel is a channel for high pressure water to accumulate energy, the channel nozzle is an apparatus for ejecting high pressure water, two eccentric high pressure water pipes connecting from the water flow channel 14 to the drill bit outer wall 1 constitute the high pressure cutting water flow system, the eccentric directions of the two eccentric high pressure water pipes are opposite, a high pressure water inlet is at a position where the high pressure water enters a high pressure water inlet channel, a high pressure water outlet is at a position where the high pressure water is ejected from the drill bit, the two high pressure water inlets are identical in height, and the two high pressure water outlets are high and low respectively, that is, the upper high pressure water outlet 71 is higher than the lower high pressure water outlet 72; a low pressure water inlet 17 is at a position where the low pressure water enters a low pressure water channel, a low pressure water outlet 18 is at a position where the low pressure water is in contact with the outside through the low pressure water channel 10, the high pressure water inlets are above the low pressure water inlets 17, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
specifically, the two eccentric high pressure water pipes constituting the high pressure cutting water flow system are respectively an upper eccentric high pressure water pipe and a lower eccentric high pressure water pipe; an upper high pressure water inlet channel Si, an upper high pressure water buffer channel 61 and an upper channel nozzle 81 are sequentially connected to constitute the upper eccentric high pressure water pipe; a lower high pressure water inlet channel 52, a lower high pressure water buffer channel 62 and a lower channel nozzle 82 are sequentially connected to constitute the lower eccentric high pressure water pipe; an upper high pressure water inlet 191 and a lower high pressure water inlet 192 are identical in height, and the upper high pressure water inlet 191 is higher than the lower high pressure water inlet 192; in this way, the upper eccentric high pressure water pipe and the lower eccentric high pressure water pipe are staggered up and down and eccentric left and right, thereby increasing the buffer length of the high pressure water jet, increasing the speed at which the water jet reaches the outlet, and improving the penetration and destructive force of the water jet.
[0017] The high pressure water-sand mixture production and abrasive adding system includes high pressure water sand-sucking channels and a sand storage box 9, the sand storage box 9 is arranged above the water flow channel 14, the sand storage box 9 provides a storage space for sand, the high pressure water buffer channels are connected to the sand storage box 9 by using the high pressure water sand-sucking channels, specifically, the upper high pressure water buffer channel 61 is connected to the sand storage box 9 by using an upper high pressure water sand-sucking channel 41, and the lower high pressure water buffer channel 62 is connected to the sand storage box 9 by using a lower high pressure water sand-sucking channel 42; the high pressure water sand-sucking channels connect the high pressure water buffer channels with the sand storage box 9, when the high pressure water passes through the joints of the high pressure water sand-sucking channels and the high pressure water buffer channels, the produced negative pressure sucks sand into the high pressure water through the channels, and therefore the high pressure water jet is mixed with the abrasive (sand) at the nozzles to form a water-sand mixture, thereby improving the penetration and destructive force of the high pressure water and improving the cutting capability of the water jet.
[0018] The high and low pressure water shunt control system includes a hole sealing baffle 15, a pressure control steel ball 13, an inner control wall 12 and a pressure control spring 11, wherein the pressure control spring 11 is a component which controls water pressure such that the low water pressure coordinates with the high water pressure, the inner control wall 12 is in contact with the drill hole inner wall of the water flow channel 14, the inner control wall 12 is provided with holes (not shown) corresponding to the high pressure water inlets and with holes 121 corresponding to the low pressure water inlets in shape and position, and when the pressure reaches a degree, the holes are connected to the corresponding channel inlets respectively, so that the water under different pressures flows into respective channels via the inner control wall 12; the pressure control steel ball 13 can control a flow direction of the high pressure water, thereby reducing the stress concentration and prolonging the service life of the apparatus; the hole sealing baffle 15 is arranged on the inner control wall 12 below the low pressure water inlets 17, the pressure control steel ball 13 is above the hole sealing baffle 15, and the pressure control spring 11 is connected to the pressure control steel ball 13 and the inner control wall 12 at the top end of the water flow channel 14;
when the pressure reaches a degree, the pressure control steel ball 13, the inner control wall 12 and the pressure control spring 11 rise, the baffle blocks part of the water flow channel 14 to control the position of the water entering the channels, and the Date Recue/Date Received 2020-05-19 =
=
inlet of the water flow is adjusted through different water pressures, so that the flow directions of the high pressure water and the low pressure water are controlled.
[0019] In this embodiment, the low pressure cooling water flow system is formed by connecting a horizontal section with a vertical section, the other end of the horizontal section is connected to the low pressure water inlet 17, and the other end of the vertical section is connected to the low pressure water outlet 18. The high pressure water inlet channel is a curved eccentric pipeline, and the high pressure water buffer channel is a horizontally contracted pipeline having a diameter smaller than those of the high pressure water inlet channel and the channel nozzle.
[0020] As a further optimization design of this embodiment, the high pressure water-sand mixture production and abrasive adding system further includes a sand supply channel 2, the upper end face of the sand storage box 9 is provided with a sand supply hole 3, and the sand supply channel 2 is from the sand supply hole 3 to the top end of the drill bit. The sand supply hole 3 serves as a position for sand to enter the apparatus, and the sand supply channel 2 is a channel for supplying sand. In the presence of the sand supply channel 2, the abrasive (sand) can be added multiple times, so that the drill bit can be reused multiple times.
[0021] The working process of the three systems according to the embodiments of the present invention is as follows:
[0022] 1) Low-pressure cooling water flow system and high pressure cutting water flow system:
the initial injected water is low pressure water because the water pressure is gradually increased, part of water flows through the low pressure water channels 10 and the high pressure water inlet channels to cool the drill bit at the initial drilling stage, and at this time, the low pressure control components do not ascend and the pressure control spring 11 is not compressed due to the low pressure; when a drill hole is drilled to a certain position, the high pressure water is required for hydraulic slotting, the water pressure at this time increasingly rises, and the pressure control components continuously ascend as the pressure received by the pressure control spring 11 increases; after a certain pressure is reached, the high pressure water impacts the pressure control steel ball 13, so that the water is shunt to the two high pressure water inlet channels.
[0023] 2) High and low pressure water shunt control system: during the cooling process, water mainly flows through the low pressure water channels, the high pressure water enters the channels to assist the cooling, and the water reaches the inside of the drill bit through the total water inlet 16; the low water pressure cannot cause the pressure control components to ascend and the pressure control spring 11 to compress, so the water enters from the low pressure water inlets 17 to the low pressure channels and then reaches the drill bit to cool the drill bit, and meanwhile, the low pressure water also enters from the high pressure water inlets to the high pressure water inlet channels and flows through the channel nozzles; the high pressure water enters from the high pressure water inlets to the high pressure water inlet channels, flows through the high pressure water buffer channels and the channel nozzles, and reaches the drill bit outer wall 1 to cool same; more importantly, during the drilling process of the drill bit, pressure water always flows out from the high pressure water channel nozzles to prevent drilling cuttings produced during the drilling process from blocking the two channel nozzles;
when the pressure water is high pressure water, the high pressure water flows from the total water inlet 16 to the high pressure water inlets, then reaches the high pressure water inlet channels, and flows through the high pressure water buffer channels, and the high-energy water jet is ejected from the high pressure water outlets through the channel nozzles to carry out hydraulic slotting.
[0024] 3) High-pressure water-sand mixture production and abrasive adding system: at the beginning, sand is injected through the sand supply hole 3, and the sand enters the sand storage box 9 through the sand supply channel 2; when high pressure water flows, the negative pressure produced by the high pressure water sucks the sand into the high pressure water, so that the sand cuts the coal (rock) mass together with the high pressure water; after the sand in the sand storage box 9 is used up, sand is supplied through the sand supply hole 3, so that the apparatus can be reused multiple times.
100251 The beneficial effects of the present invention are as follows:
[0026] 1. The apparatus is designed with eccentric jet pipes (for example, eccentric high pressure water pipes) to provide longer water jet channels, so that more energy is obtained by the high pressure water jet, the slotting range is increased, the directional fracturing effect of drill holes is better, the directional fracturing range of a single drill hole is larger, the quantity of drill holes arranged on a working face is reduced, the cost is reduced, meanwhile, the directional fracturing effect of a hard roof is better, the fracturing position of the roof is enabled to fracture along the designed fracture line when the hard roof is directionally fractured, and therefore better engineering effects, such as directional top cutting and pressure relief in a =
=
roadway near a gob, can be achieved.
100271 2. A sand storage box 9 is designed in the drill bit, and sand is sucked into the water jet through the negative pressure produced by the high pressure water jet nozzles to increase the cutting capability and cutting speed of the water jet. Cutting hard rock in the limited space of a drill hole by the pure high pressure water jet (no abrasive such as the sand is added) is difficult.
The pure high pressure water jet can cut only some soft rock strata and coal seams within a small range, and therefore is limited in cutting capability and low in cutting speed. After the sand storage box 9 is integrated in the drill bit, the abrasive (sand) can be added in the high pressure water, which can greatly improve the cutting capability of the water jet, cut hard rock or even steel plates, remarkably improve the cutting capability and greatly improve the cutting speed.
100281 3. The sand storage box 9 is supplied with sand through a special supply hole, and the capacity of the sand storage box 9 is sufficient for hydraulic slotting of a drill hole. When a drill hole is drilled to a predetermined position, after the hydraulic slotting is performed, the drill bit is withdrawn, and sand is fully fed to the inside of the drill bit through a special sand supply channel for hydraulic slotting of a next drill hole. After the special sand supply channel is designed, the hydraulic slotting drill bit can be reused multiple times, so that the practical value of the slotting drill bit is improved.
[0029] 4. The pressure is controlled through a pressure control system. When the pressure is low, only the cooling operation is performed; when the pressure is high, the pressure control components (the inner control wall 12 and the pressure control steel ball 13) compress the pressure control spring 11 due to the pressure increase, the pressure control components ascend, the lower low pressure water inlets 17 are blocked by the inner control wall 12 of the control component, the water only enters the high pressure water channels from the high pressure water inlets and reaches the high pressure water nozzles, and the high pressure water is ejected from the high pressure water outlets through the buffer channels, wherein the pressure control steel ball 13 can change the flow direction of the water to reduce the stress concentration.
[0030] Described above is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any form. Any simple modifications and equivalent changes made to the embodiment according to the technical essence of the present invention shall fall within the protection scope of the present invention.
11, pressure control spring; 12, inner control wall; 13, pressure control steel ball; 14, water flow channel; 15, hole sealing baffle; 16, total water inlet; 17, low pressure water inlet; 18, low pressure water outlet; 191, upper high pressure water inlet; 192, lower high pressure water inlet;
and 20, cutting head.
DETAILED DESCRIPTION OF THE INVENTION
[0014] In order to make the objective, technical solution and advantages of the present invention clearer, the following clearly and completely describes the technical solution in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments of the present invention.
All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
[0015] Fig. 1 to Fig. 3 are structural diagrams according to a preferred embodiment of the present invention. A self-carrying abrasive type hydraulic slotting drill bit includes a drill bit and cutting heads 20 installed on the periphery of the top of the drill bit, the cutting heads 20 are apparatuses for cutting coal mass or rock mass, the drill bit is composed of a drill bit outer wall 1 and a drill bit cavity, the drill bit outer wall 1 supports the overall shape of the drill bit, the drill bit cavity provides a working space for each internal system, and a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity.
[0016] A water flow channel 14 is formed in the center of the bottom of the drill bit, and the water flow channel 14 is formed by extending a total water inlet 16 where total water flows into the drill bit by a distance; two low pressure water channels 10 connecting from the water flow channel 14 to the top of the drill bit constitute the low pressure cooling water flow system, the low pressure water channels 10 are channels for low pressure water from the inside of the drill bit to the outside, and the two low pressure water channels 10 are arranged symmetrically with the center line of the water flow channel 14 as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, the high pressure water buffer channel is a channel for high pressure water to accumulate energy, the channel nozzle is an apparatus for ejecting high pressure water, two eccentric high pressure water pipes connecting from the water flow channel 14 to the drill bit outer wall 1 constitute the high pressure cutting water flow system, the eccentric directions of the two eccentric high pressure water pipes are opposite, a high pressure water inlet is at a position where the high pressure water enters a high pressure water inlet channel, a high pressure water outlet is at a position where the high pressure water is ejected from the drill bit, the two high pressure water inlets are identical in height, and the two high pressure water outlets are high and low respectively, that is, the upper high pressure water outlet 71 is higher than the lower high pressure water outlet 72; a low pressure water inlet 17 is at a position where the low pressure water enters a low pressure water channel, a low pressure water outlet 18 is at a position where the low pressure water is in contact with the outside through the low pressure water channel 10, the high pressure water inlets are above the low pressure water inlets 17, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
specifically, the two eccentric high pressure water pipes constituting the high pressure cutting water flow system are respectively an upper eccentric high pressure water pipe and a lower eccentric high pressure water pipe; an upper high pressure water inlet channel Si, an upper high pressure water buffer channel 61 and an upper channel nozzle 81 are sequentially connected to constitute the upper eccentric high pressure water pipe; a lower high pressure water inlet channel 52, a lower high pressure water buffer channel 62 and a lower channel nozzle 82 are sequentially connected to constitute the lower eccentric high pressure water pipe; an upper high pressure water inlet 191 and a lower high pressure water inlet 192 are identical in height, and the upper high pressure water inlet 191 is higher than the lower high pressure water inlet 192; in this way, the upper eccentric high pressure water pipe and the lower eccentric high pressure water pipe are staggered up and down and eccentric left and right, thereby increasing the buffer length of the high pressure water jet, increasing the speed at which the water jet reaches the outlet, and improving the penetration and destructive force of the water jet.
[0017] The high pressure water-sand mixture production and abrasive adding system includes high pressure water sand-sucking channels and a sand storage box 9, the sand storage box 9 is arranged above the water flow channel 14, the sand storage box 9 provides a storage space for sand, the high pressure water buffer channels are connected to the sand storage box 9 by using the high pressure water sand-sucking channels, specifically, the upper high pressure water buffer channel 61 is connected to the sand storage box 9 by using an upper high pressure water sand-sucking channel 41, and the lower high pressure water buffer channel 62 is connected to the sand storage box 9 by using a lower high pressure water sand-sucking channel 42; the high pressure water sand-sucking channels connect the high pressure water buffer channels with the sand storage box 9, when the high pressure water passes through the joints of the high pressure water sand-sucking channels and the high pressure water buffer channels, the produced negative pressure sucks sand into the high pressure water through the channels, and therefore the high pressure water jet is mixed with the abrasive (sand) at the nozzles to form a water-sand mixture, thereby improving the penetration and destructive force of the high pressure water and improving the cutting capability of the water jet.
[0018] The high and low pressure water shunt control system includes a hole sealing baffle 15, a pressure control steel ball 13, an inner control wall 12 and a pressure control spring 11, wherein the pressure control spring 11 is a component which controls water pressure such that the low water pressure coordinates with the high water pressure, the inner control wall 12 is in contact with the drill hole inner wall of the water flow channel 14, the inner control wall 12 is provided with holes (not shown) corresponding to the high pressure water inlets and with holes 121 corresponding to the low pressure water inlets in shape and position, and when the pressure reaches a degree, the holes are connected to the corresponding channel inlets respectively, so that the water under different pressures flows into respective channels via the inner control wall 12; the pressure control steel ball 13 can control a flow direction of the high pressure water, thereby reducing the stress concentration and prolonging the service life of the apparatus; the hole sealing baffle 15 is arranged on the inner control wall 12 below the low pressure water inlets 17, the pressure control steel ball 13 is above the hole sealing baffle 15, and the pressure control spring 11 is connected to the pressure control steel ball 13 and the inner control wall 12 at the top end of the water flow channel 14;
when the pressure reaches a degree, the pressure control steel ball 13, the inner control wall 12 and the pressure control spring 11 rise, the baffle blocks part of the water flow channel 14 to control the position of the water entering the channels, and the Date Recue/Date Received 2020-05-19 =
=
inlet of the water flow is adjusted through different water pressures, so that the flow directions of the high pressure water and the low pressure water are controlled.
[0019] In this embodiment, the low pressure cooling water flow system is formed by connecting a horizontal section with a vertical section, the other end of the horizontal section is connected to the low pressure water inlet 17, and the other end of the vertical section is connected to the low pressure water outlet 18. The high pressure water inlet channel is a curved eccentric pipeline, and the high pressure water buffer channel is a horizontally contracted pipeline having a diameter smaller than those of the high pressure water inlet channel and the channel nozzle.
[0020] As a further optimization design of this embodiment, the high pressure water-sand mixture production and abrasive adding system further includes a sand supply channel 2, the upper end face of the sand storage box 9 is provided with a sand supply hole 3, and the sand supply channel 2 is from the sand supply hole 3 to the top end of the drill bit. The sand supply hole 3 serves as a position for sand to enter the apparatus, and the sand supply channel 2 is a channel for supplying sand. In the presence of the sand supply channel 2, the abrasive (sand) can be added multiple times, so that the drill bit can be reused multiple times.
[0021] The working process of the three systems according to the embodiments of the present invention is as follows:
[0022] 1) Low-pressure cooling water flow system and high pressure cutting water flow system:
the initial injected water is low pressure water because the water pressure is gradually increased, part of water flows through the low pressure water channels 10 and the high pressure water inlet channels to cool the drill bit at the initial drilling stage, and at this time, the low pressure control components do not ascend and the pressure control spring 11 is not compressed due to the low pressure; when a drill hole is drilled to a certain position, the high pressure water is required for hydraulic slotting, the water pressure at this time increasingly rises, and the pressure control components continuously ascend as the pressure received by the pressure control spring 11 increases; after a certain pressure is reached, the high pressure water impacts the pressure control steel ball 13, so that the water is shunt to the two high pressure water inlet channels.
[0023] 2) High and low pressure water shunt control system: during the cooling process, water mainly flows through the low pressure water channels, the high pressure water enters the channels to assist the cooling, and the water reaches the inside of the drill bit through the total water inlet 16; the low water pressure cannot cause the pressure control components to ascend and the pressure control spring 11 to compress, so the water enters from the low pressure water inlets 17 to the low pressure channels and then reaches the drill bit to cool the drill bit, and meanwhile, the low pressure water also enters from the high pressure water inlets to the high pressure water inlet channels and flows through the channel nozzles; the high pressure water enters from the high pressure water inlets to the high pressure water inlet channels, flows through the high pressure water buffer channels and the channel nozzles, and reaches the drill bit outer wall 1 to cool same; more importantly, during the drilling process of the drill bit, pressure water always flows out from the high pressure water channel nozzles to prevent drilling cuttings produced during the drilling process from blocking the two channel nozzles;
when the pressure water is high pressure water, the high pressure water flows from the total water inlet 16 to the high pressure water inlets, then reaches the high pressure water inlet channels, and flows through the high pressure water buffer channels, and the high-energy water jet is ejected from the high pressure water outlets through the channel nozzles to carry out hydraulic slotting.
[0024] 3) High-pressure water-sand mixture production and abrasive adding system: at the beginning, sand is injected through the sand supply hole 3, and the sand enters the sand storage box 9 through the sand supply channel 2; when high pressure water flows, the negative pressure produced by the high pressure water sucks the sand into the high pressure water, so that the sand cuts the coal (rock) mass together with the high pressure water; after the sand in the sand storage box 9 is used up, sand is supplied through the sand supply hole 3, so that the apparatus can be reused multiple times.
100251 The beneficial effects of the present invention are as follows:
[0026] 1. The apparatus is designed with eccentric jet pipes (for example, eccentric high pressure water pipes) to provide longer water jet channels, so that more energy is obtained by the high pressure water jet, the slotting range is increased, the directional fracturing effect of drill holes is better, the directional fracturing range of a single drill hole is larger, the quantity of drill holes arranged on a working face is reduced, the cost is reduced, meanwhile, the directional fracturing effect of a hard roof is better, the fracturing position of the roof is enabled to fracture along the designed fracture line when the hard roof is directionally fractured, and therefore better engineering effects, such as directional top cutting and pressure relief in a =
=
roadway near a gob, can be achieved.
100271 2. A sand storage box 9 is designed in the drill bit, and sand is sucked into the water jet through the negative pressure produced by the high pressure water jet nozzles to increase the cutting capability and cutting speed of the water jet. Cutting hard rock in the limited space of a drill hole by the pure high pressure water jet (no abrasive such as the sand is added) is difficult.
The pure high pressure water jet can cut only some soft rock strata and coal seams within a small range, and therefore is limited in cutting capability and low in cutting speed. After the sand storage box 9 is integrated in the drill bit, the abrasive (sand) can be added in the high pressure water, which can greatly improve the cutting capability of the water jet, cut hard rock or even steel plates, remarkably improve the cutting capability and greatly improve the cutting speed.
100281 3. The sand storage box 9 is supplied with sand through a special supply hole, and the capacity of the sand storage box 9 is sufficient for hydraulic slotting of a drill hole. When a drill hole is drilled to a predetermined position, after the hydraulic slotting is performed, the drill bit is withdrawn, and sand is fully fed to the inside of the drill bit through a special sand supply channel for hydraulic slotting of a next drill hole. After the special sand supply channel is designed, the hydraulic slotting drill bit can be reused multiple times, so that the practical value of the slotting drill bit is improved.
[0029] 4. The pressure is controlled through a pressure control system. When the pressure is low, only the cooling operation is performed; when the pressure is high, the pressure control components (the inner control wall 12 and the pressure control steel ball 13) compress the pressure control spring 11 due to the pressure increase, the pressure control components ascend, the lower low pressure water inlets 17 are blocked by the inner control wall 12 of the control component, the water only enters the high pressure water channels from the high pressure water inlets and reaches the high pressure water nozzles, and the high pressure water is ejected from the high pressure water outlets through the buffer channels, wherein the pressure control steel ball 13 can change the flow direction of the water to reduce the stress concentration.
[0030] Described above is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any form. Any simple modifications and equivalent changes made to the embodiment according to the technical essence of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. A self-carrying abrasive type hydraulic slotting drill bit, comprising a drill bit and cutting heads installed on the periphery of the top of the drill bit, the drill bit being composed of a drill bit outer wall and a drill bit cavity, wherein a low pressure cooling water flow system and high pressure cutting water flow system, a high pressure water-sand mixture production and abrasive adding system, and a high and low pressure water shunt control system are arranged in the drill bit cavity;
a water flow channel is formed in the center of the bottom of the drill bit;
two low pressure water channels connecting from the water flow channel to the top of the drill bit constitute the low pressure cooling water flow system, and the two low pressure water channels are arranged symmetrically with the center line of the water flow channel as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, two said eccentric high pressure water pipes communicating from the water flow channel to the drill bit outer wall constitute the high pressure cutting water flow system, the eccentric directions of the two said eccentric high pressure water pipes are opposite, two high pressure water inlets are identical in height, and two high pressure water outlets are high and low respectively; the high pressure water inlets are above low pressure water inlets, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
the high pressure water-sand mixture production and abrasive adding system comprises high pressure water sand-sucking channels and a sand storage box, the sand storage box is arranged above the water flow channel, and the high pressure water buffer channels of the two said eccentric high pressure water pipes are connected to the sand storage box by using an upper high pressure water sand-sucking channel and a lower high pressure water sand-sucking channel; and the high and low pressure water shunt control system comprises a hole sealing baffle, a pressure control steel ball, an inner control wall and a pressure control spring, wherein the inner control wall is in contact with a drill hole inner wall of the water flow channel, the inner control wall is provided with holes corresponding to the high pressure water inlets and the low pressure water inlets in shape and position, the hole sealing baffle is arranged on the inner control wall below the low pressure water inlets, the pressure control steel ball is above the hole sealing baffle, and the pressure control spring is connected to the pressure control steel ball and the inner control wall at the top end of the water flow channel.
a water flow channel is formed in the center of the bottom of the drill bit;
two low pressure water channels connecting from the water flow channel to the top of the drill bit constitute the low pressure cooling water flow system, and the two low pressure water channels are arranged symmetrically with the center line of the water flow channel as a symmetry axis; a high pressure water inlet channel and a high pressure water buffer channel are sequentially connected to constitute an eccentric high pressure water pipe, a channel nozzle is arranged on the high pressure water buffer channel, two said eccentric high pressure water pipes communicating from the water flow channel to the drill bit outer wall constitute the high pressure cutting water flow system, the eccentric directions of the two said eccentric high pressure water pipes are opposite, two high pressure water inlets are identical in height, and two high pressure water outlets are high and low respectively; the high pressure water inlets are above low pressure water inlets, and the plane in which the low pressure cooling water flow system is located is perpendicular to the plane in which the high pressure cutting water flow system is located;
the high pressure water-sand mixture production and abrasive adding system comprises high pressure water sand-sucking channels and a sand storage box, the sand storage box is arranged above the water flow channel, and the high pressure water buffer channels of the two said eccentric high pressure water pipes are connected to the sand storage box by using an upper high pressure water sand-sucking channel and a lower high pressure water sand-sucking channel; and the high and low pressure water shunt control system comprises a hole sealing baffle, a pressure control steel ball, an inner control wall and a pressure control spring, wherein the inner control wall is in contact with a drill hole inner wall of the water flow channel, the inner control wall is provided with holes corresponding to the high pressure water inlets and the low pressure water inlets in shape and position, the hole sealing baffle is arranged on the inner control wall below the low pressure water inlets, the pressure control steel ball is above the hole sealing baffle, and the pressure control spring is connected to the pressure control steel ball and the inner control wall at the top end of the water flow channel.
2. The self-carrying abrasive type hydraulic slotting drill bit according to claim 1, wherein the high pressure water-sand mixture production and abrasive adding system further comprises a sand supply channel, an upper end face of the sand storage box is provided with a sand supply hole, and the sand supply channel is from the sand supply hole to the top end of the drill bit.
3. The self-carrying abrasive type hydraulic slotting drill bit according to claim 1 or claim 2, wherein the low pressure cooling water flow system is formed by connecting a horizontal section and a vertical section, the other end of the horizontal section is connected to the low pressure water inlet, and the other end of the vertical section is connected to a low pressure water outlet.
4. The self-carrying abrasive type hydraulic slotting drill bit according to claim 1 or claim 2, wherein the high pressure water inlet channel is a curved eccentric pipeline, and the high pressure water buffer channel is a horizontally contracted pipeline having a diameter smaller than those of the high pressure water inlet channel and the channel nozzle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014452.3 | 2018-01-08 | ||
| CN201810014452.3A CN108316907B (en) | 2018-01-08 | 2018-01-08 | Self-carrying abrasive type hydraulic slotting drill bit |
| PCT/CN2018/113602 WO2019134432A1 (en) | 2018-01-08 | 2018-11-02 | Hydraulic cutting drill bit with self-carried abrasive material |
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| CA3064815A1 CA3064815A1 (en) | 2019-07-11 |
| CA3064815C true CA3064815C (en) | 2020-09-08 |
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| CA3064815A Active CA3064815C (en) | 2018-01-08 | 2018-11-02 | Self-carrying abrasive type hydraulic slotting drill bit |
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| Country | Link |
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| CN (1) | CN108316907B (en) |
| CA (1) | CA3064815C (en) |
| WO (1) | WO2019134432A1 (en) |
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| CN108316907B (en) * | 2018-01-08 | 2020-05-05 | 中国矿业大学 | Self-carrying abrasive type hydraulic slotting drill bit |
| CN109098657A (en) * | 2018-10-24 | 2018-12-28 | 云南建投基础工程有限责任公司 | A kind of high-voltage water jet device and method of the processing erratic boulder in conjunction with rotary pile-digging machine |
| CN109113675B (en) * | 2018-11-03 | 2023-12-19 | 山东祥德机电有限公司 | High-low voltage conversion slotting device |
| CN110145305B (en) * | 2019-04-18 | 2021-01-19 | 天地科技股份有限公司 | Method for preventing and treating rock burst of roadway by hydraulic roof cutting and roadway retaining |
| CN112196574B (en) * | 2020-10-13 | 2022-04-22 | 中铁隧道局集团有限公司 | High-pressure water jet device for assisting tunneling machine in rock breaking |
| CN113217008A (en) * | 2021-06-18 | 2021-08-06 | 中铁工程装备集团有限公司 | Construction method of raw rock abrasive water jet in tunneling process |
| CN113417639B (en) * | 2021-07-28 | 2023-10-20 | 西安科技大学 | Method and system for preventing water injection of hard coal seam from rushing |
| CN113818812B (en) * | 2021-08-11 | 2024-01-26 | 沧州格锐特钻头有限公司 | Cone bit with temperature monitoring and cooling functions |
| CN115256239B (en) * | 2022-08-04 | 2024-03-22 | 王宇辰 | Numerical control water jet edge milling machine for printed circuit board |
| CN116532204B (en) * | 2023-04-07 | 2024-01-26 | 江苏东南环保科技有限公司 | Supercritical water oxidation garbage disposal ablation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4899835A (en) * | 1989-05-08 | 1990-02-13 | Cherrington Martin D | Jet bit with onboard deviation means |
| CN100387803C (en) * | 2005-06-08 | 2008-05-14 | 阮花 | Down-hole multiple radialized holes ultra-deep boring device by abrasive water jet |
| KR20100080662A (en) * | 2009-01-02 | 2010-07-12 | 구영회 | High jet cutting method and ground improvement excavator which has the high-pressure water participle function for this |
| CN202380976U (en) * | 2011-09-19 | 2012-08-15 | 中国矿业大学 | Mechanical automatic-switching type high-pressure water jet slotting drill |
| RU2486330C1 (en) * | 2012-02-24 | 2013-06-27 | Николай Митрофанович Панин | Hydraulic calibrator |
| CN202520224U (en) * | 2012-04-13 | 2012-11-07 | 辽宁工程技术大学 | Coal seam drilling, seam cutting and pressure releasing device |
| CN103334723B (en) * | 2013-07-09 | 2015-10-14 | 重庆大学 | A kind of underground coal mine waterpower slot self-suction abrasive jet flow generating means and method |
| CN203499569U (en) * | 2013-10-18 | 2014-03-26 | 永城煤电控股集团有限公司 | Water-pressure-controlled drilling and blanking integrated efficient drill bit |
| CN104373044A (en) * | 2014-11-03 | 2015-02-25 | 中国石油大学(北京) | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
| CN107435519A (en) * | 2016-05-27 | 2017-12-05 | 徐州博安科技发展有限责任公司 | Low discharge creeps into high flow capacity seam cutting drill bit |
| CN108316907B (en) * | 2018-01-08 | 2020-05-05 | 中国矿业大学 | Self-carrying abrasive type hydraulic slotting drill bit |
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- 2018-01-08 CN CN201810014452.3A patent/CN108316907B/en active Active
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| WO2019134432A1 (en) | 2019-07-11 |
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