CN115012829B - Inner row type right trapezoid drill bit and method for long and large geological drilling construction - Google Patents
Inner row type right trapezoid drill bit and method for long and large geological drilling construction Download PDFInfo
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- CN115012829B CN115012829B CN202210850797.9A CN202210850797A CN115012829B CN 115012829 B CN115012829 B CN 115012829B CN 202210850797 A CN202210850797 A CN 202210850797A CN 115012829 B CN115012829 B CN 115012829B
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- 238000005553 drilling Methods 0.000 title claims abstract description 147
- 238000010276 construction Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims description 27
- 239000012634 fragment Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the field of geological drilling construction, in particular to an inner row type right trapezoid drill bit and a method for long and large geological drilling construction, wherein the inner row type long and large drilling construction device, a fixed core guiding chip removal device and a fixed rotary supporting device are included; the inner row type long and large drilling construction device comprises an inner concave right trapezoid drill bit, an inner row type drill rod connecting device and an inner spiral hollow drill rod, wherein the fixed core guiding chip removal device comprises a fixed core triangular drill bit, a fixed core drill bit connecting device, an outer spiral twist drill rod and an inserted quick connecting device, and the fixed rotary supporting device comprises a fixed rotary bearing and a fixed rotary support; the fixed core guiding chip removal device is positioned at the center of the inner row long drilling construction device, and coaxial synchronous drilling of the fixed core guiding chip removal device and the inner row long drilling construction device is realized through the fixed rotary supporting device; the device can realize the core fixing and drill chip inner discharge of the drilling in the quick construction of long and large geological drilling, and effectively avoid the phenomena of drilling deflection, hole collapse and drill sticking.
Description
Technical Field
The invention relates to the field of geological drilling construction, in particular to an inner row type right trapezoid drill bit and method for long and large geological drilling construction.
Background
With the rapid development of socioeconomic performance, the demand for mineral resources is increasing, and the exploitation and application of partial shallow mineral resources are advanced into the exhaustion period. Therefore, the method increases the exploration of deep mineral resources, searches for new mineral resources deep in the earth, and has important practical significance. Geological drilling is an important means for mineral resource exploration, in particular to deep mineral resource exploration, and a long-distance and large-diameter geological drilling device which is necessary for deep mineral resource exploration is urgently needed to be developed.
Various accidents are usually encountered in geological drilling, wherein the phenomenon of hole collapse is particularly common, and the phenomenon of hole collapse of drilling is about 50% of various drilling accidents, so that the construction progress is seriously influenced. The hole collapse accident has larger handling difficulty, the conditions of burying and blocking the drill and the like are easy to occur in the handling process, and finally the drill is scrapped and the drilling tool is lost. Therefore, it is particularly important to prevent the borehole from collapsing in geological drilling, and especially long-distance and large-diameter geological drilling is easier to cause borehole collapse and jamming. The resulting borehole collapse is closely related to the differences in formation hardness, geological formations present, formation erosion, and fracture zones in the formation. The geological drilling process is not easy to master the pressure, the soft rock stratum is drilled too fast, accumulated rock powder cannot be discharged fast, and the phenomenon of blocking or abnormal drilling pump pressure and pump blocking is caused, so that the rotation resistance in the hole is increased. When the drilled holes are in long-distance contact with the coal bed, holes collapse, so that a large amount of coal and rock fragments cannot be discharged normally; when the drilled hole passes through the geological structure change zone and meets hard rock or broken coal rock stratum, slag is removed from the drilled hole during drilling, so that the drilled hole is blocked and buried.
In addition, borehole deflection is another critical issue that is urgently addressed by geological drilling, particularly when borehole length and bore diameter are large, which can more easily cause the entire borehole to deflect from the designed position. The reasons for the deflection of the drill holes are related to various factors such as geological conditions, drilling tool structures, drilling technical measures, equipment quality and the like. When geological drilling is performed from a soft stratum to a hard stratum, the drill bit is inclined due to the inclination and the heterogeneity of the drilling stratum, so that the drill bit is bent due to uneven stress, and the drill hole is inclined.
Efficient chip removal is an important guarantee for quick drilling of geological drilling. Chinese patent CN202021862119.7 discloses a coal mine geological drilling sampling device, which is only suitable for sampling, but is not suitable for drilling long geological drilling with large consumption and abrasion, and can not realize quick chip removal and accurate positioning for quick construction. Chinese patent CN201922003262.4 discloses a coal mine geological drilling sampling device, although the device is provided with an inner hole chip removal function, chip removal and drilling are separated, only part of dust can be discharged, and rapid chip removal in the high-speed drilling construction process is not possible.
The geological drilling hole collapse, drilling burying, drilling sticking and drilling deflection are caused, and the geological drilling hole collapse, drilling sticking and drilling deflection are closely related to the length, the aperture and the chip removal function of the geological drilling hole besides being influenced by hydrogeological conditions and stratum lithology. When the geological drilling length is large, the drilling deflection is easy to cause, and the chip removal is difficult and the drilling is stuck in the drilling process; when the diameter of the geological drilling hole is larger, the hole wall suspension area is larger in the drilling process, so that the phenomenon of hole collapse and drill sticking of the drilling hole is easily caused. Therefore, there is an urgent need to develop a drilling device capable of synchronously centering, supporting the hole wall in real time and rapidly removing chips in the long and large-diameter geological drilling process, so as to solve the technical problems and key problems, avoid the phenomena of drilling deflection, hole collapse and drilling sticking in the long and large-diameter geological drilling process, and ensure the rapid construction of the long and large-diameter geological drilling.
Disclosure of Invention
Aiming at the defects related to the technical background, the invention aims to provide an inner row type right trapezoid drill bit and a method for long and large geological drilling construction.
The aim of the invention can be achieved by the following technical scheme: an inner row type right trapezoid drill bit and a method for long and large geological drilling construction comprise an inner row type long and large drilling construction device, a fixed core guiding chip removal device and a fixed rotary supporting device; the inner row type long and large drilling construction device comprises an inner concave right trapezoid drill bit, an inner row type drill rod connecting device and an inner spiral hollow drill rod, wherein the fixed core guiding chip removal device comprises a fixed core triangular drill bit, a fixed core drill bit connecting device, an outer spiral twist drill rod and an inserted quick connecting device, and the fixed rotary supporting device comprises a fixed rotary bearing and a fixed rotary support; the concave right trapezoid drill bit comprises a right trapezoid cutter bit, a drill bit cylinder body and drill bit external connecting threads; the inner row type drill rod connecting device comprises drill bit connecting internal threads and drill rod connecting internal threads; the inner spiral hollow drill rod comprises spiral inner threads and drill rod connecting outer threads; the core-fixing triangular drill bit comprises a core-fixing triangular cutter head, a core-fixing triangular cutter seat and a core-fixing triangular cutter column; the plug-in quick connector comprises a plug-in groove, a plug-in convex head and a spring fixing pin bolt;
the fixed core guiding chip removal device is positioned at the center of the inner row long drilling construction device, and coaxial synchronous drilling of the fixed core guiding chip removal device and the inner row long drilling construction device is realized through the fixed rotary supporting device;
the front part of the inner row type long and large drilling construction device is provided with an inner concave right trapezoid drill bit which is connected with the rear part of the inner spiral hollow drill rod through an inner row type drill rod connecting device;
The concave right trapezoid drill bit is used for carrying out drilling and rock breaking construction through the right trapezoid cutter head, and the drill bit cylinder body is of a hollow design to prevent drill cuttings from being blocked;
the internal spiral hollow drill rod is internally provided with a spiral internal thread, so that drill cuttings can be conveniently discharged outwards along the internal spiral hollow drill rod;
The inner row type drill rod connecting device is provided with a drill bit connecting internal thread at the front part and a drill rod connecting internal thread at the rear part, so that the quick connection between the inner concave right trapezoid drill bit and the inner spiral hollow drill rod is realized;
The front part of the centering guide chip removal device is provided with a centering triangular drill bit, the centering triangular drill bit performs drilling centering construction in advance through a centering triangular cutter head, and the centering triangular cutter head is arranged on a centering triangular cutter post through a centering triangular cutter seat;
the upper part and the lower part of the core-fixing drill bit connecting device are respectively provided with a core-fixing drill bit connecting internal thread and a core-fixing drill rod connecting internal thread, the core-fixing triangular drill bit is connected with the core-fixing drill bit connecting device through the core-fixing drill bit connecting internal thread and is connected with an external spiral twist drill rod through the core-fixing drill rod connecting internal thread, and the external spiral twist drill rods are connected through an inserted quick connecting device;
the core fixing guide chip removal device is positioned at the center of the inner row type long and large drilling construction device, and coaxial synchronous drilling of the core fixing guide chip removal device and the inner row type long and large drilling construction device is realized through the fixed rotary supporting device.
Further, the application method of the inner row type right trapezoid drill bit for long and large geological drilling construction comprises the following steps:
s1, connecting the core-fixing triangular drill bit with a core-fixing drill bit connecting device through a core-fixing triangular cutter column and a core-fixing drill bit connecting internal thread, and connecting the core-fixing drill bit connecting device with an external spiral twist drill rod through a core-fixing drill rod connecting internal thread and a core-fixing drill rod connecting external thread on a core-fixing drill rod body to form a core-fixing guiding chip removal device;
s2, the concave right trapezoid drill bit is connected with an inner row type drill rod connecting device through a drill bit external connecting thread and a drill bit connecting internal thread, and the inner row type drill rod connecting device is connected with an inner spiral hollow drill rod through a drill rod connecting internal thread and a drill rod connecting external thread to form an inner row type long and large drilling construction device;
S3, the inner row type long and large drilling construction device is connected with the fixed core guiding chip removal device through a fixed rotary bearing arranged at the center of the fixed rotary support, so that coaxial drilling of the inner row type long and large drilling construction device and the fixed core guiding chip removal device is realized;
S4, the core-fixing triangular drill bit drills into a stratum in advance to achieve core fixing and internal rock breaking of long and large geological construction drilling, the concave right trapezoid drill bit drills later to achieve rock breaking and reaming of long and large geological construction drilling, the outer spiral twist drill rod achieves guiding and chip removal of rock scraps in the core-fixing triangular drill bit drilling through twist threads of the core-fixing drill rod on a rod body of the core-fixing drill rod, and meanwhile, the inner spiral hollow drill rod achieves core fixing, rock breaking and rock scraps discharging in the reaming drilling of long and large geological construction drilling through spiral internal threads in the rod body of the inner spiral hollow drill rod; through the core fixing and drill chip inner row of the drilling holes in the rapid construction of the long and large geological drilling holes, the phenomena of the deflection, hole collapse and drill sticking of the drilling holes are effectively avoided.
The beneficial effects are as follows:
(1) The inner row type right trapezoid drill bit for long and large geological drilling construction provided by the invention comprises an inner drilling device and an outer drilling device, and can realize coaxial synchronous drilling under the same power source; the inner centering guide chip removal device firstly drills into a rock layer, plays roles of centering and inner rock breaking, the outer inner-row long and large drilling construction device can accurately drill into the rock layer without damage, and break and ream the drilling holes, the inner-outer two groups of drilling devices sequentially drill into the rock layer, so that coaxial synchronous drilling of large-diameter geological drilling holes is realized, and the problem of deflection and hole collapse of the drilling holes in the long-distance drilling process of the drilling holes can be effectively avoided;
(2) The external spiral twist drill rod and the spiral internal thread of the device are matched together, so that rock scraps generated in the drilling process can be discharged out of the drill hole rapidly, the rock scraps can be effectively prevented from blocking large-diameter geological drill holes, and meanwhile, the problem of drill jamming caused by blocking the drill holes is avoided; meanwhile, due to the inner discharge of drill cuttings, the inner discharge type long and large drill construction device can support the hole wall in real time in the drilling process, so that the problem of drill burying and clamping caused by hole wall collapse in the large-diameter drill drilling process is effectively avoided;
(3) The inner row type right trapezoid drill bit for long and large geological drilling construction has the advantages of being high in modularization degree, easy to detach and assemble, and capable of quickly assembling a drilling device in the long-distance and large-diameter geological drilling process, prolonging the depth of a drilled hole and meeting the requirements of long-distance and large-diameter drilling; when the drill bit parts are worn and damaged in the drilling process, the related worn and damaged parts can be timely and quickly replaced, and high-efficiency construction drilling of the drill holes can be ensured.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention;
FIG. 2 is a schematic diagram of an inner row type long and large drilling construction device of the invention;
FIG. 3 is a schematic view of a concave right trapezoid drill bit according to the present invention;
FIG. 4 is a schematic view of an inline drill rod connection apparatus of the present invention;
FIG. 5 is a schematic view of the inner helical hollow drill rod of the present invention;
FIG. 6 is a schematic view of a centering guide chip removal device of the present invention;
FIG. 7 is a schematic view of a fixed-core delta drill bit of the present invention;
FIG. 8 is a schematic view of a pilot bit connection of the present invention;
FIG. 9 is a schematic view of an outer helical twist drill rod of the present invention;
FIG. 10 is a schematic view of a centering guide chip removal device of the present invention;
FIG. 11 is a schematic view of the assembly of the centering guide chip ejection device and the fixed rotary support device of the present invention;
The reference numerals are:
1. An inner row type long and large drilling construction device; 1-1, a concave right trapezoid drill bit; 1-1a, right trapezoid cutter head; 1-1b, a drill bit barrel; 1-1c, drill external connecting threads; 1-2, an inner row type drill rod connecting device; 1-2a, connecting a drill bit with an internal thread; 1-2b, connecting a drill rod with an internal thread; 1-3, an inner spiral hollow drill rod; 1-3a, a spiral internal thread; 1-3b, connecting the drill rod with external threads;
2. The core fixing and guiding chip removing device; 2-1, a fixed-core triangular drill bit; 2-1a, a fixed-core triangular cutter head; 2-1b, a fixed core triangular tool apron; 2-1c, a fixed-core triangular knife column; 2-2, a core-fixing drill bit connecting device; 2-2a, connecting the core fixing drill bit with an internal thread; 2-2b, connecting the fixed core drill rod with an internal thread; 2-3, an outer spiral twist drill rod; 2-3a, connecting the core fixing drill rod with external threads; 2-3b, twist threads of the fixed-core drill rod; 2-3c, centering the drill rod body; 2-4, a plug-in quick connector; 2-4a, insert grooves; 2-4b, male nose; 2-4c, spring fixing pins;
3. a fixed rotary support device; 3-1, fixing a rotary bearing; 3-2, fixing the rotary bracket.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-11, the invention provides an inner row type right trapezoid drill bit and a method for long and large geological drilling construction, wherein the inner row type right trapezoid drill bit comprises an inner row type long and large drilling construction device 1, a fixed core guiding chip removal device 2 and a fixed rotary supporting device 3; the inner row type long and large drilling construction device 1 comprises an inner concave right trapezoid drill bit 1-1, an inner row type drill rod connecting device 1-2 and an inner spiral hollow drill rod 1-3, wherein a right trapezoid cutter head 1-1a is arranged at the upper part of the inner concave right trapezoid drill bit 1-1, a drill bit barrel 1-1b is connected at the lower end of the inner concave right trapezoid drill bit, and drill bit external connecting threads 1-1c are formed at the lower part of the drill bit barrel 1-1 b; the upper end of the inner part of the inner row type drill rod connecting device 1-2 is provided with a drill bit connecting internal thread 1-2a, and the lower end is provided with a drill rod connecting internal thread 1-2b; the inner spiral hollow drill rod 1-3 is internally provided with spiral inner threads 1-3a, and the upper end of the outer part is provided with drill rod connecting outer threads 1-3b; the core-fixing guiding chip removal device 2 comprises a core-fixing triangular drill bit 2-1, a core-fixing drill bit connecting device 2-2, an outer spiral twist drill rod 2-3 and an inserted quick connecting device 2-4; the core-fixing triangular drill bit 2-1 comprises a core-fixing triangular cutter head 2-1a, a core-fixing triangular cutter seat 2-1b and a core-fixing triangular cutter column 2-1c; the upper end of the inner part of the fixed core drill bit connecting device 2-2 is provided with a fixed core drill bit connecting internal thread 2-2a, and the lower end is provided with a fixed core drill rod connecting internal thread 2-2b; the outer spiral twist drill rod 2-3 is provided with a twist thread 2-3b of the core fixing drill rod outside the rod body 2-3c of the core fixing drill rod, and the upper end of the outer part is provided with a connecting outer thread 2-3a of the core fixing drill rod; the plug-in quick connection device 2-4 comprises a plug-in groove 2-4a, a plug-in convex head 2-4b and a spring fixing pin 2-4c;
The inside of a drill bit cylinder body 1-1b of the concave right trapezoid drill bit 1-1 is hollow, three right trapezoid cutter heads 1-1a distributed in a 120-degree angle circumferential array are installed on the upper portion of the drill bit cylinder body 1-1b, drill bit external connection threads 1-1c formed on the lower portion of the drill bit cylinder body 1-1b can be connected with inner row type drill rod connection devices 1-2 through threaded connection with drill bit connection internal threads 1-2a formed on the upper inner portion of the inner row type drill rod connection devices 1-2, drill rod connection internal threads 1-2b formed on the lower portion of the inner row type drill rod connection devices 1-2 can be connected with inner spiral hollow drill rods 1-3 through threaded connection with drill rod connection external threads 1-3b formed on the upper outer portion of the inner row type hollow drill rods 1-3, and accordingly the inner row type drill rod connection devices 1-2 are formed to be long and long.
The core-fixing triangular drill bit 2-1 comprises a core-fixing triangular cutter head 2-1a, a core-fixing triangular cutter seat 2-1b and a core-fixing triangular cutter column 2-1c, wherein threads with the same specification as the internal thread 2-2a of the core-fixing drill bit connection arranged at the upper end inside the core-fixing drill bit connecting device 2-2 are arranged on the core-fixing triangular cutter column 2-1c, the core-fixing triangular drill bit 2-1 is connected with the core-fixing drill bit connecting device 2-2 through threaded connection, the internal thread 2-2b of the core-fixing drill rod connection arranged at the lower end inside the core-fixing drill bit connecting device 2-2 is connected with the external thread 2-3a of the core-fixing drill rod connection arranged at the upper end outside the core-fixing drill rod body 2-3c through threaded connection, the twist thread 2-3b of the core fixing drill rod is arranged outside the rod body 2-3c of the core fixing drill rod to enable drill cuttings to be discharged to the rear part, the inserted quick connecting device 2-4 arranged at the tail part of the outer spiral twist drill rod 2-3 consists of an inserted groove 2-4a, an inserted protruding head 2-4b and a spring fixing pin 2-4c, a hole capable of accommodating the spring fixing pin 2-4c is formed in the upper part of the inserted protruding head 2-4b, a hole capable of accommodating the head part of the spring fixing pin 2-4c is formed in the inserted groove 2-4a of the inserted quick connecting device 2-4 formed at the tail part of the upper outer spiral twist drill rod 2-3, the spring fixing pin 2-4c is ejected from the hole, the heads of the spiral twist drill rods can be embedded into holes which are formed in the inserted grooves 2-4a and can be used for accommodating the heads of the spring fixing pins 2-4c, so that the spiral twist drill rods 2-3 can be tightly connected with each other, and the centering guide chip removal device 2 is formed by the components.
The fixed rotary supporting device 3 consists of a fixed rotary bearing 3-1 and a fixed rotary support 3-2, wherein the fixed rotary bearing 3-1 is arranged on the fixed rotary support 3-2, the fixed rotary bearing 3-1 is a ball bearing, the diameter of the inner ring of the fixed rotary bearing is the same as that of the rod body of the outer spiral twist drill rod 2-3, so that the outer spiral twist drill rod 2-3 can be nested in the fixed rotary bearing 3-1, three slender supporting rods on the fixed rotary support 3-2 are arranged on the inner wall of the inner row type long drilling construction device 1, and the fixed core guiding chip removing device 2 is positioned at the central position of the inner row type long drilling construction device 1 without influencing the discharge of drill cuttings.
The using method of the inner row type right trapezoid drill bit for long and large geological drilling construction comprises the following steps:
s1, a core-fixing triangular drill bit 2-1 is connected with a core-fixing drill bit connecting device 2-2 through a core-fixing triangular cutter column 2-1c and a core-fixing drill bit connecting internal thread 2-2a, and the core-fixing drill bit connecting device 2-2 is connected with an external spiral twist drill rod 2-3 through a core-fixing drill rod connecting internal thread 2-2b and a core-fixing drill rod connecting external thread 2-3a to form a core-fixing guiding chip removal device 2;
S2, the concave right trapezoid drill bit 1-1 is connected with an inner row type drill rod connecting device 1-2 through a drill bit external connecting thread 1-1c and a drill bit connecting internal thread 1-2a, and the inner row type drill rod connecting device 1-2 is connected with an inner spiral hollow drill rod 1-3 through a drill rod connecting internal thread 1-2b and a drill rod connecting external thread 1-3b to form an inner row type long and large drilling construction device 1;
S3, the inner-row long and large drilling construction device 1 is connected with the fixed core guiding chip removing device 2 through a fixed rotary bearing 3-1 arranged in the center of a fixed rotary support 3-2, so that coaxial drilling of the inner-row long and large drilling construction device 1 and the fixed core guiding chip removing device 2 is realized;
S4, the fixed-core triangular drill bit 2-1 drills into a stratum in advance to realize fixed core and internal rock breaking of long-growing geological construction drilling, the concave right-angle trapezoid drill bit 1-1 drills later to realize rock breaking and reaming of long-growing geological construction drilling, the outer spiral twist drill rod 2-3 realizes guiding and chip removal of rock scraps in drilling of the fixed-core triangular drill bit 2-1 to the rear part of the drilling through fixed-core drill rod twist threads 2-3b on a rod body, and meanwhile, the inner spiral hollow drill rod 1-3 realizes fixed core, rock breaking and chip discharge in reaming to the rear part of the drilling of long-growing geological construction drilling through spiral internal threads 1-3a in the rod body; through the core fixing and drill chip inner row of the drilling holes in the rapid construction of the long and large geological drilling holes, the phenomena of the deflection, hole collapse and drill sticking of the drilling holes are effectively avoided.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean 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 present 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.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (1)
1. The use method of the inner row type right trapezoid drill bit for long and large geological drilling construction is characterized in that the inner row type right trapezoid drill bit comprises an inner row type long and large drilling construction device (1), a centering guiding chip removal device (2) and a fixed rotary supporting device (3); the inner row type long and large drilling construction device (1) comprises an inner concave right trapezoid drill bit (1-1), an inner row type drill rod connecting device (1-2) and an inner spiral hollow drill rod (1-3), the core fixing guide chip removal device (2) comprises a core fixing triangular drill bit (2-1), a core fixing drill bit connecting device (2-2), an outer spiral twist drill rod (2-3) and an inserted quick connecting device (2-4), the fixed rotary supporting device (3) comprises a fixed rotary bearing (3-1) and a fixed rotary support (3-2), the core fixing guide chip removal device (2) is positioned at the center of the inner row type long and large drilling construction device (1), and coaxial synchronous drilling between the core fixing guide chip removal device (2) and the inner row type long and large drilling construction device (1) is realized through the fixed rotary supporting device (3);
The front part of the inner row type long and large drilling construction device (1) is provided with a concave right trapezoid drill bit (1-1) which is connected with a rear inner spiral hollow drill rod (1-3) through an inner row type drill rod connecting device (1-2); the inner concave right trapezoid drill bit (1-1) comprises a right trapezoid cutter head (1-1 a), a drill bit barrel (1-1 b) and drill bit external connection threads (1-1 c), the inner row type drill rod connection device (1-2) comprises drill bit connection internal threads (1-2 a) and drill rod connection internal threads (1-2 b), the inner spiral hollow drill rod (1-3) comprises spiral internal threads (1-3 a) and drill rod connection external threads (1-3 b), the core-fixing triangular drill bit (2-1) comprises a core-fixing triangular cutter head (2-1 a), a core-fixing triangular cutter seat (2-1 b) and a core-fixing triangular cutter column (2-1 c), and the plug-in quick connection device (2-4) comprises a plug-in groove (2-4 a), a plug-in raised head (2-4 b) and a spring fixing bolt (2-4 c); the external spiral twist drill rod (2-3) comprises a fixed core drill rod body (2-3 c), fixed core drill rod twist threads (2-3 b) and fixed core drill rod connecting external threads (2-3 a);
The front part of the centering guide chip removal device (2) is provided with a centering triangular drill bit (2-1), the centering triangular drill bit (2-1) is subjected to drilling centering construction in advance through a centering triangular cutter head (2-1 a), the centering triangular cutter head (2-1 a) is arranged on a centering triangular cutter column (2-1 c) through a centering triangular cutter seat (2-1 b), the upper part and the lower part of the centering drill bit connecting device (2-2) are respectively provided with a centering drill bit connecting internal thread (2-2 a) and a centering drill rod connecting internal thread (2-2 b), the centering triangular drill bit (2-1) is connected with the centering drill bit connecting device (2-2) through the centering drill rod connecting internal thread (2-2 a) and is connected with an outer spiral twist drill rod (2-3) through a fixed core drill rod connecting internal thread (2-2 b), and the outer spiral twist drill rod (2-3) are connected through an inserting quick connecting device (2-4);
the using method comprises the following steps:
s1, connecting a core-fixing triangular drill bit (2-1) with a core-fixing drill bit connecting device (2-2) through a core-fixing triangular cutter column (2-1 c) and a core-fixing drill bit connecting internal thread (2-2 a), and connecting the core-fixing drill bit connecting device (2-2) with an external spiral twist drill rod (2-3) through a core-fixing drill rod connecting internal thread (2-2 b) and a core-fixing drill rod connecting external thread (2-3 a) to form a core-fixing guide chip removal device (2);
s2, the concave right trapezoid drill bit (1-1) is connected with an inner row type drill rod connecting device (1-2) through a drill bit external connecting thread (1-1 c) and a drill bit connecting internal thread (1-2 a), and the inner row type drill rod connecting device (1-2) is connected with an inner spiral hollow drill rod (1-3) through a drill rod connecting internal thread (1-2 b) and a drill rod connecting external thread (1-3 b) to form an inner row type long and large drilling construction device (1);
S3, the inner-row long and large drilling construction device (1) is connected with the fixed core guiding chip removing device (2) through a fixed rotary bearing (3-1) arranged at the center of the fixed rotary support (3-2), so that coaxial synchronous drilling of the inner-row long and large drilling construction device (1) and the fixed core guiding chip removing device (2) is realized;
S4, the fixed-core triangular drill bit (2-1) drills into a stratum in advance to realize fixed core and internal rock breaking of long-sized geological drilling construction, the concave right-angle trapezoid drill bit (1-1) drills into the stratum later to realize rock breaking and reaming of long-sized geological drilling construction, the outer spiral twist drill rod (2-3) realizes guiding and chip removal of rock scraps in drilling of the fixed-core triangular drill bit (2-1) to the rear part of the drilling hole through fixed-core drill rod twist threads (2-3 b) on a fixed-core drill rod body (2-3 c), and meanwhile, the inner spiral hollow drill rod (1-3) realizes fixed core, rock breaking and rock scraps in reaming drilling to the rear part of the long-sized geological drilling construction through spiral internal threads (1-3 a) in the rod body; through the core fixing and the inner discharge of rock fragments in the rapid construction of long and large geological drilling, the phenomena of drilling deflection, hole collapse and drill sticking are effectively avoided.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850797.9A CN115012829B (en) | 2022-07-19 | 2022-07-19 | Inner row type right trapezoid drill bit and method for long and large geological drilling construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850797.9A CN115012829B (en) | 2022-07-19 | 2022-07-19 | Inner row type right trapezoid drill bit and method for long and large geological drilling construction |
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| CN115012829A CN115012829A (en) | 2022-09-06 |
| CN115012829B true CN115012829B (en) | 2024-11-01 |
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| CN115012829A (en) | 2022-09-06 |
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