CN109882077B - Axial slot cutter in hole - Google Patents
Axial slot cutter in hole Download PDFInfo
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- CN109882077B CN109882077B CN201910212922.1A CN201910212922A CN109882077B CN 109882077 B CN109882077 B CN 109882077B CN 201910212922 A CN201910212922 A CN 201910212922A CN 109882077 B CN109882077 B CN 109882077B
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- axial slot
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- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 21
- 239000011435 rock Substances 0.000 description 16
- 238000005422 blasting Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 238000005336 cracking Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012962 cracking technique Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses an in-hole axial slot cutter which is suitable for being mounted on a drill rod and comprises a cylinder body, a cutter, a piston and a tensioning device. The cylinder body comprises a side wall and a bottom wall, the side wall and the bottom wall enclose a cylinder cavity, the side wall is provided with an axially extending knife slot, and the knife slot transversely penetrates through the side wall to communicate the cylinder cavity with the outside; the cutter can be installed in the cutter slot in a swinging way towards the inside and the outside of the cylinder body; the piston can be arranged in the cylinder cavity in a vertically movable manner between an upper limit and a lower limit, the upper end of the piston is abutted against the cutter, and when the piston moves upwards, the piston pushes the cutter to swing outwards of the cylinder body so that the cutter extends out of the cylinder body from the cutter slot; the tensioning device is connected with the piston to pull the piston to move upwards. The in-hole axial grooving device can cut an axial guide groove at any depth of a drilled hole, and is suitable for drilling holes with any inclination angle and any diameter.
Description
Technical Field
The invention relates to the technical field of rock mass engineering driller slotting, in particular to an in-hole axial slotting device.
Background
Cutting grooves with certain shapes and specifications are cut in rock mass engineering drilling holes, and favorable conditions can be provided for achieving the specific purpose of inducing cracking. For example, a drill guide slot cutter is used in the technique of controlling blasting directional cracking to cut a guide slot in a drill hole, which is beneficial to the expansion of cracks generated by blasting along the direction of the guide slot. In controlled blasting, it is important to precisely control the direction of rock fracture in order to obtain a flat rock fracture surface. Directional fracture technology research shows that by changing the shape and structure of the drilling hole, stress concentration is generated in the direction of the connecting center surface of the drilling hole, so that directional cracks are formed preferentially. The directional slotting device can drill the drilling guide groove, so that the blasting fracture surface can be expanded along the direction of the guide groove to form a flat rock fracture surface, and the blasting control purposes such as smooth blasting, presplitting blasting and the like are achieved.
The existing tools for cutting guide grooves in a drill hole are mainly used for cutting guide grooves (namely axial guide grooves) with the plane of the guide grooves parallel to the axial direction of the drill hole, and mainly used for controlling blasting technology. The guide grooves generated by the prior guide groove cutters generally extend from the orifice to the bottom of the hole, mainly because the cutter is fixed in structure and cannot be adjusted, so that the guide grooves cannot be cut at any depth in the drilled hole; and is not suitable for drilling holes with any inclination angle and any diameter.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an in-hole axial slot cutter that can cut an axial guide slot at any depth of a drilled hole and is suitable for drilling holes of any inclination and diameter.
An in-hole axial slot cutter according to an embodiment of the present invention, adapted to be mounted on a drill rod, comprises:
The cylinder body comprises a side wall and a bottom wall, a cylinder cavity is formed by the side wall and the bottom wall in a surrounding mode, an axially extending cutter notch is formed in the side wall, and the cutter notch transversely penetrates through the side wall to communicate the cylinder cavity with the outside;
The cutter is arranged in the cutter notch in a manner of swinging towards the inside and the outside of the cylinder body;
The piston is arranged in the cylinder cavity in a manner of moving up and down between an upper limit and a lower limit, the upper end of the piston is abutted against the cutter, and when the piston moves upwards, the piston pushes the cutter to swing outwards of the cylinder body so that the cutter extends out of the cylinder body from the cutter slot;
and the tensioning device is connected with the piston to pull the piston to move upwards.
According to the in-hole axial slot cutter disclosed by the embodiment of the invention, when the in-hole axial slot cutter is used, the in-hole axial slot cutter is arranged on a drill rod, the in-hole axial slot cutter and the drill rod are placed into a drill hole until the in-hole axial slot cutter reaches a preset depth, the drill rod is connected to a vertical shaft of a drilling machine, a piston is pulled to move upwards through a tensioning device, and when the piston moves upwards, a cutter is pushed to swing outwards of a cylinder body, so that the cutter extends out of the cylinder body from the slot hole and contacts with the wall of the drill hole, and meanwhile, the vertical shaft is lifted or lowered through the control of the drilling machine, so that the drill rod moves up and down along with the drill hole, and meanwhile, the cutter of the in-hole axial slot cutter also moves up and down on the wall of the drill hole, so that an axial guide groove is cut on the wall of the drill hole. The in-hole axial slot cutter 100 of the embodiment of the invention can be matched with drill rods with different lengths to realize that an axial guide slot is formed at any depth of a drilled hole. And because the cutter can be connected in a swinging way, the cutter can be in adaptive contact with the wall of a drilling hole, and therefore, the in-hole axial grooving device provided by the embodiment of the invention is suitable for drilling holes with any inclination angle and any diameter. When the axial guide groove of the drill hole is cut, the tensioning device can be released, the piston moves downwards under the action of self gravity, the cutter can enable the axial grooving device in the hole to move downwards by lowering the vertical shaft of the drilling machine, and the cutter is pressed against the wall of the drill hole, so that the cutter swings towards the cylinder body to return to the original position.
According to one embodiment of the invention, the tensioning device comprises a tensioner and a wire rope which is used for being arranged in the central hole of the drill rod in a penetrating mode, the lower end of the wire rope is fixed with the piston, and the upper end of the wire rope is connected with the tensioner.
According to one embodiment of the invention, the piston further comprises a spring, the upper end of which is connected to the lower end of the piston, and the lower end of which is connected to the bottom wall of the cylinder.
According to some embodiments of the invention, the piston further comprises a limiting rope, wherein the upper end of the limiting rope is fixed with the lower end of the piston, and the lower end of the limiting rope is fixed with the bottom wall of the cylinder body.
According to some embodiments of the invention, the drilling rod is fixed to the cylinder body by a connecting head.
According to a further embodiment of the invention, the connection head is screwed with the drill rod.
According to a further embodiment of the invention, a baffle is arranged at the lower end of the connector, the baffle is located above the cylinder cavity, and the steel wire rope passes through the baffle.
According to some embodiments of the invention, the device further comprises an orientation meter for measuring in real time the indicated orientation of the plane in which the knife slot is located, the orientation meter being fixed to the underside of the bottom wall of the cylinder.
According to some embodiments of the invention, the lower end of the knife slot is provided with a mounting shaft, the knife is provided with a mounting hole, and the knife is movably mounted on the mounting shaft through the mounting hole.
According to some embodiments of the invention, the cylinder is cylindrical, the two knife slots are symmetrically arranged along the central axis of the cylinder, and the two knives are movably arranged in the two knife slots respectively.
According to some embodiments of the invention, the cutter comprises a cutter body and a cutter head, wherein the cutter body comprises an arch-shaped side part and a straight side part, two ends of the arch-shaped side part are respectively connected with two ends of the straight side part, the cutter head is adaptively inlaid on the arch-shaped side part, and the upper end of the piston is abutted against the straight side part.
According to a further embodiment of the invention, two mounting holes are provided for the cutter, the two mounting holes are respectively adjacent to the connection parts of the two ends of the arched side part and the two ends of the straight side part, and the cutter is mounted on the mounting shaft at the notch of one cutter through one of the two mounting holes.
According to a further embodiment of the invention, the length of the straight edge portion is smaller than or equal to the radius of the cylinder.
According to a further embodiment of the invention, the tool bit is made of tungsten carbide alloy steel.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an axial cross-sectional view of an in-bore axial slot cutter according to an embodiment of the present invention.
FIG. 2 is a schematic view of a tool for an in-hole axial slot cutter according to an embodiment of the present invention.
FIG. 3 is another schematic view of a tool for an in-hole axial slot cutter according to an embodiment of the present invention.
Fig. 4 is a transverse cross-sectional view of an in-bore axial slot cutter in accordance with an embodiment of the present invention.
Fig. 5 is an application scenario of the in-hole axial slot cutter according to the embodiment of the present invention.
FIG. 6 is a schematic illustration of the operation of the in-bore axial slot cutter according to an embodiment of the present invention.
FIG. 7 is another schematic illustration of the operation of the in-bore axial slot cutter according to an embodiment of the present invention.
FIG. 8 is a further schematic illustration of the operation of the in-bore axial slot cutter according to an embodiment of the present invention.
Reference numerals:
in-hole axial slot cutter 100
Drill rod 1
Mounting shaft 241 of notch 24 of cylinder cavity 23 of bottom wall 22 of side wall 21 of cylinder body 2
Cutter 3 cutter body 31 cutter head 32 mounting hole 33
Piston 4
Tensioning device 5 tensioner 51 wire rope 52
Spring 6
Spacing rope 7
Baffle 81 of connector 8
Directional instrument 9
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The rock mass engineering refers to engineering activities which are carried out by human beings taking natural rock mass as a research object to achieve certain economic or social benefits, and comprises mining rock mass engineering, tunnel rock mass engineering, oil gas rock mass engineering and the like. The rock mass induced cracking technique refers to a method for inducing a desired cracking effect in the rock mass by a certain engineering means. The axial guide groove plays an important role in the rock mass induced cracking technology in the aspect of generating cracks along the axial direction of the drill hole, and has wide application prospects in the aspects of controlling blasting, hydraulic fracturing ore rock pretreatment, pressure relief and reflection increase of a coal mine roof and the like. The invention discloses an in-hole axial slot cutter, which is an instrument capable of cutting an axial guide slot at any depth in a rock mass engineering drilling hole and is an important tool for guaranteeing a rock mass induced cracking effect.
An in-hole axial slot cutter 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 8.
As shown in fig. 1-8, an in-hole axial slot cutter 100 according to an embodiment of the present invention is adapted to be mounted on a drill rod 1, and includes a cylinder 2, a cutter 3, a piston 4, and a tightening device 5. The cylinder body 2 comprises a side wall 21 and a bottom wall 22, the side wall 21 and the bottom wall 22 enclose a cylinder cavity 23, an axially extending cutter slot 24 is arranged on the side wall 21, and the cutter slot 24 transversely penetrates through the side wall 21 so as to communicate the cylinder cavity 23 with the outside; the cutter 3 is swingably installed in the cutter pocket 24 toward the inside and outside of the cylinder 2; the piston 4 is arranged in the cylinder cavity 23 in a manner of moving up and down between an upper limit and a lower limit, the upper end of the piston 4 is abutted against the cutter 3, and when the piston 4 moves upwards, the piston 4 pushes the cutter 3 to swing outwards of the cylinder 2 so that the cutter 3 extends out of the cylinder 2 from the cutter slot 24; a tensioning device 5 is connected to the piston 4 to pull the piston 4 upwards.
Specifically, the in-bore axial slot cutter 100 is adapted to be mounted on the drill rod 1. It will be appreciated that the in-hole axial slot cutter 100 may be mounted on the drill rod 1, and the length of the drill rod 1 may be increased or decreased by increasing or decreasing the number of drill rods 1 used, so that the in-hole axial slot cutter 100 may be used to cut guide slots at any depth of a borehole in cooperation with the drill rod 1.
The cylinder body 2 comprises a side wall 21 and a bottom wall 22, and the side wall 21 and the bottom wall 22 enclose a cylinder cavity 23 which can be used for accommodating the cutter 3, the piston 4 and the like; the upper end of the cylinder chamber 23 is open, which is convenient for the installation of the piston 4 and other components. The side wall 21 is provided with an axially extending knife slot 24, the knife slot 24 transversely penetrates through the side wall 21 to communicate the cylinder cavity 23 with the outside, and therefore a movable and accommodating space can be provided for the knife 3 when the knife swings towards the inside and outside of the cylinder body 2.
The cutter 3 is swingably installed in the cutter pocket 24 toward the inside and outside of the cylinder 2; in other words, the cutter 3 can swing outwards of the cylinder 2, extend out of the cylinder 2 and contact the hole wall to axially cut the hole wall; when it is not necessary to cut the hole wall axially, the cutter 3 can be lowered by lowering the drill vertical shaft to move the in-hole axial slot cutter 100 downward, and the cutter 3 is pushed against the cutter 3 by the hole wall, so that the cutter 3 swings into the cylinder 2 to be reset.
The piston 4 is arranged in the cylinder cavity 23 in a manner of moving up and down between an upper limit and a lower limit, and the upper end of the piston 4 is abutted against the cutter 3, so that when the piston 4 moves upwards, the piston 4 can push the cutter 3 to swing outwards of the cylinder body 2, and the cutter 3 extends out of the cylinder body 2 from the cutter slot 24 and contacts with a drilling hole wall; when the borehole wall does not need to be cut, the piston 4 moves downwards under the action of gravity, the cutter 3 can downwards move the axial slot cutter 100 in the borehole by lowering the vertical shaft of the drilling machine, and the cutter 3 is pressed against the cutter 3 by the borehole wall, so that the cutter 3 swings towards the inside of the cylinder body 2 to return.
A tensioning device 5 is connected to the piston 4 to pull the piston 4 upwards. Thus, as shown in fig. 6, when the axial cutting of the borehole wall is required, the piston 4 can be pulled by the tensioning device 5 to move upwards, and in the process of moving upwards, the cutter 3 is pushed to swing beyond the cylinder 2 and extend out of the cylinder 2 to contact with the borehole wall. When the borehole wall is not required to be axially cut, the tensioning device 5 is released, the piston moves downwards under the action of self gravity, the cutter 3 can downwards move the in-hole axial slot cutter 100 by lowering the vertical shaft of the drilling machine, and the cutter 3 is pressed by the borehole wall, so that the cutter 3 swings towards the inside of the cylinder body 2 to return to the original position.
According to the in-hole axial slot cutter 100 of the embodiment of the invention, when in use, the in-hole axial slot cutter 100 is arranged on a drill rod 1, the in-hole axial slot cutter 100 and the drill rod 1 are placed into a drill hole until the in-hole axial slot cutter 100 reaches a preset depth, after the orientation of a cutter slot opening 24 is adjusted, the drill rod 1 is connected to a vertical shaft of a drilling machine, a piston 4 is pulled to move upwards through a tensioning device 5, and when the piston 4 moves upwards, a cutter 3 is pushed to swing outwards of a cylinder body 2, so that the cutter 3 extends out of the cutter slot opening 24 and contacts with the wall of the drill hole, and meanwhile, a vertical shaft is controlled to be lifted or lowered through the drilling machine, so that the drill rod 1 moves up and down along with the cutter 3 of the in-hole axial slot cutter 100, and further an axial guide slot is cut on the wall of the drill hole. The in-hole axial slot cutter 100 of the embodiment of the invention can be matched with drill rods 1 with different lengths to realize that an axial guide slot is formed at any depth of a drilled hole. And because the cutters can be swingably connected so as to be in adaptive contact with the borehole wall, the in-hole axial slot cutter 100 of the embodiment of the present invention is suitable for use in boreholes of any inclination angle and diameter. When the axial guide groove of the drill hole is cut, the tensioning device 5 can be released, the piston 4 moves downwards under the action of self gravity, the cutter 3 can move downwards through the vertical shaft of the drill hole, the cutter 3 is pressed against the cutter 3 through the wall of the drill hole, and the cutter 3 swings towards the inside of the cylinder body 2 to be reset.
As shown in fig. 1 and 5, according to an embodiment of the present invention, the tightening device 5 includes a tensioner 51 and a wire rope 52 for being threaded in a center hole of the drill rod 1, a lower end of the wire rope 52 is fixed to the piston 4, and an upper end of the wire rope 52 is connected to the tensioner 51. When the drill rod is used, the steel wire rope 52 passes through the central hole of the drill rod 1, the upper end of the drill rod is connected with the tensioner 51, the steel wire rope 52 is tensioned by the tensioner 51 to move upwards, the piston 4 moves upwards along with the steel wire rope 52, and meanwhile, the piston 4 pushes the cutter 3 to swing outwards of the cylinder body 2, so that the cutter 3 is in contact with the wall of the drill hole. Therefore, the driving piston 4 moves upwards through the tensioner 51 and the steel wire rope 52, and the device is simple in structure and convenient to install.
As shown in fig. 1 and 5, according to an embodiment of the present invention, there is also included a spring 6, an upper end of the spring 6 being connected to a lower end of the piston 4, and a lower end of the spring 6 being connected to a bottom wall 22 of the cylinder 2. By providing a spring 6 between the piston 4 and the bottom wall 22 of the cylinder 2, when the piston 4 moves upwards, the spring 6 is stretched, and then the tensioning device 5 is released, the piston 4 moves downwards under the own weight and the force of the spring 6, and the tool 3 can move downwards the in-hole axial slot cutter 100 by lowering the vertical shaft of the drilling machine, and the tool 3 is pressed against the wall of the drilling hole, so that the tool 3 swings towards the inside of the cylinder 2 to be reset.
As shown in fig. 1 and 5, according to some embodiments of the present invention, the present invention further includes a stopper rope 7, an upper end of the stopper rope 7 is fixed to a lower end of the piston 4, and a lower end of the stopper rope 7 is fixed to a bottom wall 22 of the cylinder 2. Thus, by providing the limit rope 7, the maximum stroke of the upward movement of the piston 4 can be limited, and the upward movement of the piston 4 can be controlled not to slide out of the upper limit.
As shown in fig. 1 and 5, according to some embodiments of the present invention, a connection head 8 for connecting with the drill rod 1 is further included, and the connection head 8 is fixed at the upper end of the cylinder 2. Specifically, the connector 8 can be fixed on the cylinder body 2 in a welding mode, and the axial slot cutter in the hole can be conveniently installed on the drill rod 1 by arranging the connector 8 on the cylinder body 2.
According to a further embodiment of the invention, the connection head 8 is screwed with the drill rod 1. Specifically, the connector 8 is provided with an internal thread, the drill rod 1 is provided with an external thread, and the connector 8 is connected with the drill rod 1 through the matching of the internal thread and the external thread, so that the in-hole axial slot cutter 100 can be quickly and conveniently installed on the drill rod 1.
According to a further embodiment of the invention, the lower end of the connection head 8 is provided with a baffle 81, the baffle 81 being located above the cylinder chamber 23, the wire rope 52 passing through the baffle 81. Thus, by providing the baffle 81, the piston 4 can be prevented from being pulled out of the cylinder chamber 23. According to some embodiments of the invention, it further comprises an orientation gauge 9 for measuring in real time the indicated orientation of the plane in which the knife slot 24 is located, the orientation gauge 9 being fixed to the underside of the bottom wall 22 of the cylinder 2. The direction indicator 9 can be used for measuring the indication direction of the plane where the cutter slot opening 24 is located in real time, and the measured direction angle is transmitted to a working computer at the drill hole opening in real time in a wireless mode, so that the cutter slot opening 24 is in a preset direction by adjusting and driving the cylinder body 2 to rotate through the drill rod 1, and the axial guide slot can be formed in any direction of a drilled hole.
As shown in fig. 4, according to some embodiments of the present invention, the lower end of the pocket 24 is provided with a mounting shaft 241, the cutter 3 is provided with a mounting hole 33, and the cutter 3 is movably mounted on the mounting shaft 241 through the mounting hole 33, and the mounting structure is simple.
According to some embodiments of the invention, the cylinder 2 is cylindrical, two knife notches 24 are provided, the two knife notches 24 are symmetrically arranged along the central axis of the cylinder 2, two knives 3 are provided, and the two knives 3 are movably mounted in the two knife notches 24 respectively. By arranging two knife notches 24 and two knives 3 symmetrically, the efficiency of cutting can be improved.
As shown in fig. 2 and 3, according to some embodiments of the present invention, the cutter 3 includes a cutter body 31 and a cutter head 32, the cutter body 31 includes an arcuate edge portion and a straight edge portion, the cutter head 32 is fittingly inlaid on the arcuate edge portion, and an upper end of the piston 4 abuts against the straight edge portion. By arranging the cutter body 31 as an arched edge, it is ensured that the head 32 of the cutter 3 is adapted to better contact the borehole wall for cutting; by arranging the cutter head 32 and the cutter body 31 into two bodies, the cutter head can be made of different materials according to the needs, and the cost is reduced under the condition of ensuring the excellent performance of the cutter head 32. For example, the cutter body 31 may be made of a common steel material, and the cutter head 32 may be made of a high-strength abrasion-resistant material. When the tool bit 32 is worn, the tool bit 32 may be replaced.
According to a further embodiment of the invention, the mounting holes 33 of the tool 3 are provided in two, the two mounting holes 33 being adjacent to the connection of the two ends of the arched side portion with the two ends of the straight side portion, respectively, the tool 3 being mounted on the mounting shaft 241 at one of the tool slots 24 by one of the two mounting holes 33. Thus, when the bit 32 of the cutter 3 is partially worn, the mounting shaft 241 mounted at the other pocket 24 can be detached, so that the bit 32 of the cutter 3 can be fully utilized.
According to a further embodiment of the invention, the length of the straight edge portion is less than or equal to the radius of the cylinder 2. Thereby, it is advantageous that both tools 3 can be accommodated in the cylinder chamber 23.
According to a further embodiment of the present invention, the tool tip 32 is a tool tip 32 made of tungsten carbide alloy steel. Because the tungsten carbide alloy steel has excellent high-strength and abrasion-resistant properties, the requirements of the tool bit 32 on the performance in use can be ensured, and the service life of the in-hole axial slot cutter 100 can be ensured.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An in-hole axial slot cutter adapted for mounting on a drill pipe, comprising:
The cylinder body comprises a side wall and a bottom wall, a cylinder cavity is formed by the side wall and the bottom wall in a surrounding mode, an axially extending cutter notch is formed in the side wall, and the cutter notch transversely penetrates through the side wall to communicate the cylinder cavity with the outside;
The cutter is arranged in the cutter notch in a manner of swinging towards the inside and the outside of the cylinder body;
The piston is arranged in the cylinder cavity in a manner of moving up and down between an upper limit and a lower limit, the upper end of the piston is abutted against the cutter, and when the piston moves upwards, the piston pushes the cutter to swing outwards of the cylinder body so that the cutter extends out of the cylinder body from the cutter slot;
the tensioning device is connected with the piston to pull the piston to move upwards; the tensioning device comprises a tensioner and a steel wire rope which is arranged in a central hole of the drill rod in a penetrating mode, the lower end of the steel wire rope is fixed with the piston, and the upper end of the steel wire rope is connected with the tensioner;
The upper end of the spring is connected with the lower end of the piston, and the lower end of the spring is connected with the bottom wall of the cylinder body;
The cutter comprises a cutter body and a cutter head, wherein the cutter body comprises an arch-shaped side part and a straight edge part, two ends of the arch-shaped side part are respectively connected with two ends of the straight edge part, the cutter head is adaptively inlaid on the arch-shaped side part, and the upper end of the piston is abutted against the straight edge part; the length of the straight edge part is smaller than or equal to the radius of the cylinder body.
2. The in-hole axial slot cutter of claim 1, further comprising a spacing rope, an upper end of the spacing rope being fixed with a lower end of the piston, a lower end of the spacing rope being fixed with the bottom wall of the cylinder.
3. The in-hole axial slot cutter of claim 1, further comprising a connector for connection to a drill rod, the connector being secured to an upper end of the cylinder.
4. A hole axial slot cutter as defined in claim 3, wherein the connection head is threadably connected to the drill rod.
5. A hole axial slot cutter as claimed in claim 3, wherein the lower end of the connector is provided with a baffle, the baffle being located above the cylinder chamber, the wire rope passing through the baffle.
6. The in-hole axial slot cutter of claim 1, further comprising an orienter for measuring in real time an indicated orientation of a plane in which the slot opening lies, the orienter being fixed to an underside of the bottom wall of the cylinder.
7. The in-hole axial slot cutter of claim 1, wherein a lower end of the cutter slot is provided with a mounting shaft, the cutter is provided with a mounting hole, and the cutter is movably mounted on the mounting shaft through the mounting hole.
8. The in-hole axial slot cutter of claim 1, wherein the cylinder is cylindrical, two of the knife slots are symmetrically arranged along a central axis of the cylinder, and two of the knives are movably mounted in the two knife slots, respectively.
9. The in-hole axial slot cutter of claim 7, wherein two mounting holes are provided for the cutter, the two mounting holes being adjacent to the connection portions of the two ends of the arcuate edge portion and the two ends of the straight edge portion, respectively, the cutter being mounted on the mounting shaft at one of the cutter slots through one of the two mounting holes.
10. The in-hole axial slot cutter of claim 1, wherein the cutter head is a cutter head made of tungsten carbide alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212922.1A CN109882077B (en) | 2019-03-20 | 2019-03-20 | Axial slot cutter in hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212922.1A CN109882077B (en) | 2019-03-20 | 2019-03-20 | Axial slot cutter in hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109882077A CN109882077A (en) | 2019-06-14 |
| CN109882077B true CN109882077B (en) | 2024-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910212922.1A Active CN109882077B (en) | 2019-03-20 | 2019-03-20 | Axial slot cutter in hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109882077B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206860129U (en) * | 2017-05-05 | 2018-01-09 | 北京博德世达石油技术股份有限公司 | Casing cutter |
| CN209942743U (en) * | 2019-03-20 | 2020-01-14 | 中国恩菲工程技术有限公司 | Axial grooving device in hole |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1204425A (en) * | 1957-04-01 | 1960-01-26 | Joy Mfg Co | Self-advancing cutting bit for casings |
| CN2115398U (en) * | 1992-03-03 | 1992-09-09 | 李珩 | Radial slotted drill bits |
| CN104775813B (en) * | 2015-03-26 | 2017-06-27 | 天地科技股份有限公司 | Longitudinal groover in a kind of retractable hole |
| CN105952384B (en) * | 2016-06-23 | 2018-04-24 | 大同煤矿集团有限责任公司 | Hydrofracturing Orthogonal Composite twolip slotting drill |
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2019
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206860129U (en) * | 2017-05-05 | 2018-01-09 | 北京博德世达石油技术股份有限公司 | Casing cutter |
| CN209942743U (en) * | 2019-03-20 | 2020-01-14 | 中国恩菲工程技术有限公司 | Axial grooving device in hole |
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| CN109882077A (en) | 2019-06-14 |
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