CN111706263A - Pipe following drilling tool and rotary drilling rig - Google Patents
Pipe following drilling tool and rotary drilling rig Download PDFInfo
- Publication number
- CN111706263A CN111706263A CN202010699091.8A CN202010699091A CN111706263A CN 111706263 A CN111706263 A CN 111706263A CN 202010699091 A CN202010699091 A CN 202010699091A CN 111706263 A CN111706263 A CN 111706263A
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- cutting plate
- rotary cutting
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- rotary
- casing
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- 238000005553 drilling Methods 0.000 title claims abstract description 112
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 230000000670 limiting effect Effects 0.000 claims description 56
- 238000000034 method Methods 0.000 abstract description 18
- 239000002689 soil Substances 0.000 abstract description 11
- 230000002829 reductive effect Effects 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 7
- 235000017491 Bambusa tulda Nutrition 0.000 description 7
- 241001330002 Bambuseae Species 0.000 description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 7
- 239000011425 bamboo Substances 0.000 description 7
- 238000005527 soil sampling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting 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
- E21B12/00—Accessories for drilling tools
- E21B12/04—Drill bit protectors
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The embodiment of the invention provides a pipe following drilling tool and a rotary drilling rig, and relates to the technical field of rotary drilling rigs. The pipe-following drilling tool comprises a drilling tool main body, a main shaft, a first rotary cutting plate and a second rotary cutting plate, wherein the main shaft is arranged on the drilling tool main body and used for mounting a drill bit; the first and second rotary cutting plates are centrosymmetric about the spindle. The first rotary cutting plate and the second rotary cutting plate rotate along a first direction, so that the first rotary cutting plate and the second rotary cutting plate are exposed to the outer side of the protective sleeve; the first and second rotary cutting plates rotate in a second direction to retract the first and second rotary cutting plates to the inside of the shroud. The pipe following drilling tool can realize reaming drilling, reduce the frictional resistance in the process of lowering the casing, reduce the phenomenon of engineering over square, and realize grading soil taking and circulating operation.
Description
Technical Field
The invention relates to the technical field of rotary drilling rigs, in particular to a pipe following drilling tool and a rotary drilling rig.
Background
The rotary drilling rig needs to adopt different drilling tools and construction methods for construction according to different geological conditions. In the loose and miscellaneous soil filling stratum and the sand layer which are easy to shrink and easy to collapse holes and the serious permeable stratum, a long pile casing or a full pile casing is used for protecting the wall. In the construction process of the long pile casing, the diameter of the upper pile casing is different from that of the hole formed by the drilling tool, so that the up-down consistency of the diameter of the cast-in-place pile is poor, the phenomenon of over-square exists frequently in the engineering, and the soil sampling and the circular operation in different times cannot be realized.
Disclosure of Invention
The invention aims to provide a pipe following drilling tool and a rotary drilling rig, which can improve the up-and-down consistency of the diameter of a cast-in-place pile, realize reaming drilling, reduce the frictional resistance in the process of lowering a casing, reduce the phenomenon of engineering oversteer and realize graded soil taking and circulating operation.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a pipe-following drilling tool, which is applied to a casing; the pipe-following drilling tool comprises a drilling tool main body, a main shaft, a first rotary cutting plate and a second rotary cutting plate, wherein the main shaft is arranged on the drilling tool main body and used for mounting a drill bit; the first and second rotary cutting plates are centrosymmetric about the spindle;
the first rotary cutting plate and the second rotary cutting plate rotate along a first direction, so that the first rotary cutting plate and the second rotary cutting plate are exposed to the outer side of the casing; the first and second rotary cutting plates rotate in a second direction to retract the first and second rotary cutting plates to an inside of the shroud.
In an optional implementation manner, a first rotating shaft and a second rotating shaft are arranged on the drilling tool main body, and the first rotating shaft is connected with the first rotary cutting plate and is used for driving the first rotary cutting plate to rotate; the second rotating shaft is connected with the second rotary cutting plate and used for driving the second rotary cutting plate to rotate.
In an alternative embodiment, the first rotating shaft and the second rotating shaft are centrosymmetric about the main shaft.
In an alternative embodiment, the first rotating shaft is welded to the first rotating cutting plate and the second rotating shaft is welded to the second rotating cutting plate.
In an optional embodiment, a first limiting member and a second limiting member are disposed on the drill main body, and the first limiting member is connected to the first rotary cutting plate and is used for limiting a rotation range of the first rotary cutting plate; the second limiting piece is connected with the second rotary cutting plate and used for limiting the rotation range of the second rotary cutting plate.
In an optional embodiment, a fixed bottom plate is arranged on the drilling tool main body, and the first limiting piece and the second limiting piece are arranged on the fixed bottom plate; the first rotary cutting plate is provided with a first limiting groove, the second rotary cutting plate is provided with a second limiting groove, the first limiting part is movably clamped in the first limiting groove, and the second limiting part is movably clamped in the second limiting groove.
In an optional embodiment, the first limiting groove and the second limiting groove are arc grooves, respectively.
In an alternative embodiment, the first rotary cutting plate includes a first end and a second end connected to each other, and the first rotary cutting plate rotates in the first direction to expose the first end to the outside of the casing; the first rotary cutting plate rotates in the second direction to retract the first end to the inside of the casing;
the second rotary cutting plate comprises a third end part and a fourth end part which are connected with each other, and the second rotary cutting plate rotates along the first direction so that the third end part is exposed out of the outer side of the casing; the second rotary cutting plate rotates in the second direction to retract the fourth end portion to the inside of the casing.
In an alternative embodiment, the first end portion and the third end portion are each provided with a cutting guide.
In a second aspect, an embodiment of the present invention provides a rotary drilling rig, which includes a power mechanism and the pipe following drilling tool according to any one of the foregoing embodiments, where the power mechanism is connected to the drilling tool main body.
The pipe-following drilling tool comprises a drilling tool main body, a main shaft, a first rotary cutting plate and a second rotary cutting plate, wherein the main shaft is arranged on the drilling tool main body and used for mounting a drill bit; the first and second rotary cutting plates are centrosymmetric about the spindle;
the first rotary cutting plate and the second rotary cutting plate rotate along a first direction, so that the first rotary cutting plate and the second rotary cutting plate are exposed to the outer side of the casing; the first and second rotary cutting plates rotate in a second direction to retract the first and second rotary cutting plates to an inside of the shroud.
The beneficial effects of the embodiment of the invention include, for example:
according to the pipe-following drilling tool provided by the embodiment of the invention, the first rotary cutting plate and the second rotary cutting plate which are symmetrical are arranged on the drilling tool main body, and when the first rotary cutting plate and the second rotary cutting plate rotate along the first direction, the first rotary cutting plate and the second rotary cutting plate are exposed to the outer side of the pile casing; the first rotary cutting plate and the second rotary cutting plate rotate along the second direction, so that the first rotary cutting plate and the second rotary cutting plate retract to the inner side of the protective cylinder, namely the first rotary cutting plate and the second rotary cutting plate rotate along different directions, the relative positions of the first rotary cutting plate and the second rotary cutting plate and the protective cylinder are changed, and variable-diameter rotation is achieved. This follow pipe drilling tool can realize the reaming when first rotatory cutting plate and the rotatory cutting plate of second expose to the outside of protecting the section of thick bamboo and creep into, reduces the section of thick bamboo and transfers the frictional resistance of process, reduces the super square phenomenon of engineering. When the first rotary cutting plate and the second rotary cutting plate retract to the inner side of the casing, the soil can be taken out in a grading mode and the circular operation can be achieved.
The rotary drilling rig provided by the embodiment of the invention comprises the pipe following drilling tool, can realize reaming drilling, reduce the frictional resistance in the lowering process of the casing, reduce the over square phenomenon of engineering, realize graded soil taking and circulating operation, and greatly improve the construction quality and the construction efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an application scenario of a pipe-following drilling tool according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first perspective application of a casing drilling tool according to an embodiment of the present invention;
fig. 3 is an application structure diagram of a second perspective view of a casing drilling tool according to an embodiment of the present invention.
Icon: 100-a pipe-following drilling tool; 200-protecting the cylinder; 110-a tool body; 120-a main shaft; 121-a drill bit; 130-a first rotary cutting plate; 131-a first rotating shaft; 132-a first retaining groove; 133-a first end portion; 135-a second end; 140-a second rotary cutting plate; 141-a second rotating shaft; 142-a second limit groove; 143-a third end; 145-fourth end; 150-a stationary base plate; 151-first limit stop; 152-a second stop; 161-cutting guide plate; 163-rotary digging tooth.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
When the rotary drilling rig is used for construction on loose and miscellaneous soil filling strata and sand layers which are easy to shrink and easy to collapse holes and serious permeable strata, a long pile casing or a full pile casing is used for protecting the wall so as to prevent the hole wall from collapsing. In the pile casing construction process, the diameter of the upper pile casing is different from that of the hole formed by the drilling tool, so that the up-down consistency of the diameter of the cast-in-place pile is poor, and the phenomenon of over-square is frequently caused in the engineering. In order to solve the problems in the prior art, the embodiment of the invention provides a pipe-following drilling tool 100 applied to a casing 200, which can effectively reduce the over-square problem.
Fig. 1 is a schematic view of an application scenario structure of a pipe-following drilling tool 100 according to an embodiment of the present invention, please refer to fig. 1.
The embodiment provides a casing drilling tool 100 applied to a casing 200. The heel tube drilling tool 100 includes a tool body 110, a main spindle 120, a first rotary cutting plate 130, and a second rotary cutting plate 140, the main spindle 120 being provided on the tool body 110 for mounting a drill bit 121. The first and second rotary cutting plates 130 and 140 are centrosymmetric about the spindle 120. In the embodiment, the first rotary cutting plate 130 and the second rotary cutting plate 140 are symmetrically arranged, so that the stress is balanced in the rotating process, and the structure is more stable. First rotatory cutting plate 130 and second rotatory cutting plate 140 rotate along first direction, under the resistance promotion of ground to make first rotatory cutting plate 130 and second rotatory cutting plate 140 expose to the outside of protecting a section of thick bamboo 200, realize digging soon that the pore-forming diameter is greater than protecting a section of thick bamboo 200 diameter, play the effect of enlarged aperture, the drilling of being convenient for with the pipe under this operating mode, reduce the section of thick bamboo 200 and transfer the frictional resistance of process, reduce engineering over side phenomenon. The first and second rotary cutting plates 130 and 140 rotate in the second direction, pushed by the resistance of the soil, so that the first and second rotary cutting plates 130 and 140 are retracted to the inside of the casing 200. At this time, the overall outer dimension of the casing drill 100 is reduced to be consistent with the drill body 110 and smaller than the diameter of the casing 200, so that the casing drill can move up and down in the casing 200 easily, and the separate soil sampling and the cycle operation can be realized. The pipe following drilling tool 100 can realize reaming drilling, reduce the frictional resistance in the lowering process of the protective sleeve 200, reduce engineering over-square phenomena, realize grading soil taking and circulating operation, and greatly improve the construction quality and the construction efficiency of the rotary drilling rig.
Optionally, a first rotating shaft 131 and a second rotating shaft 141 are arranged on the drill body 110, and the first rotating shaft 131 is connected with the first rotary cutting plate 130 and is used for driving the first rotary cutting plate 130 to rotate; the second rotating shaft 141 is connected to the second rotating cutting plate 140 for driving the second rotating cutting plate 140 to rotate. Further, the first rotating shaft 131 is welded to the first rotating cutting plate 130, the second rotating shaft 141 is welded to the second rotating cutting plate 140, and the welding mode can improve structural strength and connection reliability, reduce the failure rate of the following pipe drilling tool 100, and prolong the service life of the following pipe drilling tool 100. Of course, the present invention is not limited thereto, and the first rotating shaft 131 and the first rotating cutting plate 130 and the second rotating shaft 141 and the second rotating cutting plate 140 may be formed by interference fit, snap connection, screw connection, riveting or key connection, other than welding, and the present invention is not limited thereto.
In this embodiment, the first rotating shaft 131 and the second rotating shaft 141 are symmetric with respect to the main shaft 120. The symmetrical structure arrangement can realize more balanced stress in the operation process, offset partial working stress and improve the structural strength and the use reliability.
Further, a first limiting member 151 and a second limiting member 152 are disposed on the drill body 110, and the first limiting member 151 is connected to the first rotating cutting plate 130 and is used for limiting a rotation range of the first rotating cutting plate 130; the second limiting member 152 is connected to the second rotary cutting plate 140 for limiting a rotation range of the second rotary cutting plate 140. It is easy to understand that the rotation range of the first rotating cutting plate 130 and the second rotating cutting plate 140 will affect the dimension of the first rotating cutting plate 130 and the second rotating cutting plate 140 exposed outside the casing 200, i.e. the size of the hole drilled by the rotary drilling.
Fig. 2 is an application structure diagram of a first viewing angle of the pipe-following drilling tool 100 according to an embodiment of the present invention, and fig. 3 is an application structure diagram of a second viewing angle of the pipe-following drilling tool 100 according to an embodiment of the present invention, please refer to fig. 2 and fig. 3.
Optionally, a fixed bottom plate 150 is further disposed on the drill body 110, and the first limiting member 151 and the second limiting member 152 are disposed on the fixed bottom plate 150. The main shaft 120 penetrates through the fixed base plate 150, and the drill bit 121 is mounted on the main shaft 120, and the drill bit 121 is located at the foremost end of the heel pipe drilling tool 100 and serves as a main drilling component when drilling in rock and soil. A fixed base plate 150 is located on the side of the first and second rotary cutting plates 130, 140 away from the drill bit 121. A first stopper 151 and a second stopper 152 are provided on the fixed base plate 150. Specifically, the first rotating cutting plate 130 is provided with a first limiting groove 132, the position of the first limiting groove 132 corresponds to the position of the first limiting member 151, so that the first limiting member 151 is movably clamped in the first limiting groove 132, when the first rotating cutting plate 130 rotates, the first limiting groove 132 and the first limiting member 151 rotate relatively, and the first limiting member 151 is used for limiting the rotating range of the first rotating cutting plate 130. Similarly, the second rotating cutting plate 140 is provided with a second limiting groove 142, and the position of the second limiting groove 142 corresponds to the position of the second limiting member 152, so that the second limiting member 152 can be movably clamped in the second limiting groove 142. When the second rotating cutting plate 140 rotates, the second limiting groove 142 and the second limiting member 152 rotate relatively, and the second limiting member 152 is used for limiting the rotating range of the first rotating cutting plate 130.
In this embodiment, the first and second limiting grooves 132 and 142 are arc grooves, and the radians of the arc grooves are consistent with the rotational radians of the first and second rotary cutting plates 130 and 140. The arc length of the arc groove is set according to the diameter of a rotary drilling hole of the rotary drilling rig. In other alternative embodiments, the limiting groove may be formed in the fixed base plate 150, and the limiting member may be provided in the first rotating cutting plate 130 and the second rotating cutting plate 140, so that the rotation angles of the first rotating cutting plate 130 and the second rotating cutting plate 140 may be limited. Alternatively, a stopper is provided on the tool body 110 to limit the rotation range of the first and second rotary cutting plates 130 and 140, which is not particularly limited herein.
Optionally, the first rotary cutting plate 130 includes a first end 133 and a second end 135 that are connected to each other, the first end 133 being closer to the inner wall of the casing 200 than the second end 135, the second rotary cutting plate 140 includes a third end 143 and a fourth end 145 that are connected to each other, the third end 143 being closer to the inner wall of the casing 200 than the fourth end 145. The first end portion 133 and the third end portion 143 are respectively provided with a cutting guide plate 161, each cutting guide plate 161 is provided with a plurality of rotary excavating teeth 163 arranged at intervals, and in the drilling process of the pipe following drilling tool 100, the rotary excavating teeth 163 and the drill bit 121 jointly cut rock soil, so that rotary excavating drilling is realized. In this embodiment, when the casing drilling tool 100 drills in the forward direction, that is, the main shaft 120 drives the drill bit 121 to rotate in the forward direction, as shown in fig. 2, the first rotating shaft 131 drives the first rotating cutting plate 130 to rotate in the forward direction (clockwise rotation), and the second rotating shaft 141 drives the second rotating cutting plate 140 to rotate in the forward direction (clockwise rotation), that is, the first rotating cutting plate 130 and the second cutting plate rotate relative to the fixed base plate 150 in the first direction, so that the first end portion 133 and the third end portion 143 extend to the outside of the casing 200 and are exposed to the outside of the casing 200 under the pushing of the cutting resistance. At this moment, the diameter of the rotary drilling hole of the casing drilling tool 100 is slightly larger than the outer diameter of the casing 200, a hole expanding effect is achieved, then the casing drilling is achieved, the friction resistance in the lowering process of the casing 200 is reduced, the up-down consistency of the diameter of the cast-in-place pile is guaranteed, and the engineering over-square phenomenon is reduced. When the casing drilling tool 100 rotates in the reverse direction, that is, the main shaft 120 drives the drill bit 121 to rotate in the reverse direction, the first rotary cutting plate 130 and the second cutting plate rotate relative to the fixed base plate 150 in the second direction (that is, counterclockwise), so that the first end portion 133 and the third end portion 143 are retracted toward the inner side of the casing 200 and retracted to the inner side of the casing 200 under the pushing action of the cutting resistance. At this time, the overall outer dimension of the casing drill 100 is reduced, and the casing drill is made to be consistent with the drill body 110 and smaller than the inner diameter of the casing 200, so that the casing drill can move up and down in the casing 200 relatively easily, and the separate soil sampling and circulation work can be realized.
In the casing drilling tool 100 provided by the embodiment, the outer diameter of the drilling tool body 110 can be contracted in the process of lowering the drilling tool body 110 in the casing 200; during the cutting drilling process, the movable first rotary cutting plate 130 and the second rotary cutting plate 140 arranged at the bottom of the drill tool body 110 can cut along with the drill bit 121 in the forward direction, the outer diameter of the drill tool body 110 is increased and extends to the outer side of the casing 200, so that the reaming drilling is realized, and the frictional resistance in the lowering process of the casing 200 is reduced. Meanwhile, the outer diameter of the drilling tool main body 110 is slightly larger than the outer diameter of the pile casing 200, so that the up-and-down consistency of the diameter of the cast-in-place pile can be ensured, and the engineering over-square phenomenon is reduced. Further, when the drill 121 performs reverse cutting, the first and second rotary cutting plates 130 and 140 are retracted into the casing 200 and retracted into the casing 200, so that they can move up and down in the casing 200 easily, thereby achieving a separate soil sampling and circulation operation.
The embodiment of the invention also provides a rotary drilling rig, which comprises a power mechanism and the pipe-following drilling tool 100 in any one of the above embodiments, wherein the power mechanism is connected with the drilling tool main body 110 and provides cutting power for the drilling tool main body 110. The casing drilling tool 100 includes a tool body 110, a main shaft 120, a first rotary cutting plate 130, and a second rotary cutting plate 140, the main shaft 120 being provided on the tool body 110 for mounting a drill bit 121; the first and second rotary cutting plates 130 and 140 are centrosymmetric about the spindle 120. The first and second rotary cutting plates 130 and 140 are rotated in a first direction such that the first and second rotary cutting plates 130 and 140 are exposed to the outside of the casing 200; the first and second rotary cutting plates 130 and 140 are rotated in the second direction to retract the first and second rotary cutting plates 130 and 140 to the inside of the casing 200. This dig drilling rig's drilling tool main part 110 soon can realize the variable diameter adjustment, when drill bit 121 forward drilling, the first rotatory cutting plate 130 and the second rotatory cutting plate 140 extensible that drilling tool main part 110 bottom set up to the heart can protect a section of thick bamboo 200 outside, the whole overall dimension grow of drilling tool main part 110 realizes the reaming and creeps into, can reduce the section of thick bamboo 200 and transfer the frictional resistance of process under this operating mode, guarantee the upper and lower uniformity of bored concrete pile diameter simultaneously, reduce engineering square phenomenon. When the drill bit 121 performs reverse cutting, the first rotary cutting plate 130 and the second rotary cutting plate 140 may be retracted to the inner side of the casing 200, and the overall external dimension of the drill body 110 may be reduced, so that the drill body 110 may move up and down in the casing 200 more easily, thereby achieving a separate soil sampling and recycling operation.
In summary, the embodiment of the present invention provides a pipe following drilling tool 100 and a rotary drilling rig, which have the following beneficial effects:
according to the pipe-following drilling tool 100 provided by the embodiment of the invention, the first rotary cutting plate 130 and the second rotary cutting plate 140 are arranged at the bottom of the drilling tool main body 110 in a centering manner, when the drill bit 121 drills in the forward direction, the first rotary cutting plate 130 and the second rotary cutting plate 140 extend towards the outer side of the casing 200, the overall dimension of the drilling tool main body 110 is increased, reaming drilling is realized, the frictional resistance in the lowering process of the casing 200 is favorably reduced, the up-and-down consistency of the diameter of a cast-in-place pile is ensured, and the engineering over-square phenomenon is reduced. When the drill bit 121 rotates reversely, the first rotary cutting plate 130 and the second rotary cutting plate 140 retract toward the inner side of the casing 200, so that the overall dimension of the drill body 110 is reduced, and the drill body can move up and down in the casing 200 more easily, thereby realizing the operation of soil sampling and circulation in multiple times.
The rotary drilling rig provided by the embodiment of the invention comprises the following pipe drilling tool 100, wherein the following pipe drilling tool 100 can be applied to the casing 200, and is suitable for the working conditions that the casing 200 is required to be used in the loose and miscellaneous filled soil stratum and the sand layer which are easy to shrink and easy to collapse holes and the serious permeable stratum, so that the frictional resistance in the process of lowering the casing 200 can be reduced, the vertical consistency of the diameter of a cast-in-place pile is ensured, and the engineering over-square phenomenon is reduced; but also can move up and down in the casing 200 easily, thus realizing the repeated soil sampling and circulating operation.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A pipe-following drilling tool is characterized by being applied to a pile casing (200); the pipe-following drilling tool comprises a drilling tool main body (110), a main shaft (120), a first rotary cutting plate (130) and a second rotary cutting plate (140), wherein the main shaft (120) is arranged on the drilling tool main body (110) and is used for mounting a drill bit (121); the first and second rotary cutting plates (130, 140) are centrosymmetric about the spindle (120);
the first and second rotary cutting plates (130, 140) are rotated in a first direction to expose the first and second rotary cutting plates (130, 140) to the outside of the casing (200); the first and second rotary cutting plates (130, 140) are rotated in a second direction to retract the first and second rotary cutting plates (130, 140) to the inside of the casing (200).
2. The pipe-following drilling tool according to claim 1, wherein a first rotating shaft (131) and a second rotating shaft (141) are arranged on the drilling tool body (110), and the first rotating shaft (131) is connected with the first rotary cutting plate (130) and used for driving the first rotary cutting plate (130) to rotate; the second rotating shaft (141) is connected with the second rotary cutting plate (140) and is used for driving the second rotary cutting plate (140) to rotate.
3. The pipe-drilling tool according to claim 2, wherein the first and second shafts (131, 141) are centrosymmetric about the main shaft (120).
4. The pipe-following drill according to claim 2, wherein the first rotary shaft (131) is welded to the first rotary cutting plate (130) and the second rotary shaft (141) is welded to the second rotary cutting plate (140).
5. The pipe-following drilling tool according to claim 1, wherein a first retaining member (151) and a second retaining member (152) are provided on the drilling tool body (110), the first retaining member (151) being connected to the first rotating cutting plate (130) for limiting a rotation range of the first rotating cutting plate (130); the second limiting member (152) is connected with the second rotary cutting plate (140) and used for limiting the rotation range of the second rotary cutting plate (140).
6. The pipe-following drilling tool according to claim 5, wherein a fixed bottom plate (150) is provided on the drilling tool body (110), and the first stopper (151) and the second stopper (152) are provided on the fixed bottom plate (150); the first rotating cutting plate (130) is provided with a first limiting groove (132), the second rotating cutting plate (140) is provided with a second limiting groove (142), the first limiting piece (151) is movably clamped in the first limiting groove (132), and the second limiting piece (152) is movably clamped in the second limiting groove (142).
7. The pipe-following drilling tool according to claim 6, wherein the first and second retaining grooves (132, 142) are arc grooves, respectively.
8. The pipe-drilling tool according to claim 1, wherein the first rotary cutting plate (130) comprises a first end portion (133) and a second end portion (135) connected to each other, the first rotary cutting plate (130) being rotated in the first direction to expose the first end portion (133) to the outside of the casing (200); the first rotary cutting plate (130) is rotated in the second direction to retract the first end (133) to the inside of the casing (200);
the second rotary cutting plate (140) comprises a third end portion (143) and a fourth end portion (145) which are connected with each other, and the second rotary cutting plate (140) rotates along the first direction to enable the third end portion (143) to be exposed out of the protective sleeve (200); the second rotary cutting plate (140) rotates in the second direction to retract the fourth end (145) to the inside of the casing (200).
9. The pipe-following drill according to claim 8, wherein the first end portion (133) and the third end portion (143) are provided with cutting guides (161), respectively.
10. A rotary drilling rig comprising a power mechanism and a pipe-following drilling tool according to any one of claims 1 to 9, the power mechanism being connected to the drilling tool body (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010699091.8A CN111706263A (en) | 2020-07-20 | 2020-07-20 | Pipe following drilling tool and rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010699091.8A CN111706263A (en) | 2020-07-20 | 2020-07-20 | Pipe following drilling tool and rotary drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111706263A true CN111706263A (en) | 2020-09-25 |
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| CN202010699091.8A Pending CN111706263A (en) | 2020-07-20 | 2020-07-20 | Pipe following drilling tool and rotary drilling rig |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943277A (en) * | 2021-03-19 | 2021-06-11 | 苏燕 | Novel rotary digging tooth of shield machine |
| CN115162961A (en) * | 2022-07-08 | 2022-10-11 | 重庆大学 | Rotary drilling bit and rotary drilling rig with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112943277A (en) * | 2021-03-19 | 2021-06-11 | 苏燕 | Novel rotary digging tooth of shield machine |
| CN115162961A (en) * | 2022-07-08 | 2022-10-11 | 重庆大学 | Rotary drilling bit and rotary drilling rig with same |
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