CN210714474U - Reaming block type concentric pipe following drilling tool - Google Patents
Reaming block type concentric pipe following drilling tool Download PDFInfo
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- CN210714474U CN210714474U CN201921221668.3U CN201921221668U CN210714474U CN 210714474 U CN210714474 U CN 210714474U CN 201921221668 U CN201921221668 U CN 201921221668U CN 210714474 U CN210714474 U CN 210714474U
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Abstract
The utility model provides a concentric drilling tool with pipe of reaming piece formula, includes concentric drill bit, reaming piece, lock sleeve and locking system, the reaming piece passes through the rotation axis and installs in the rotation axis of concentric drill bit downthehole, the reaming piece is installed on concentric drill bit after through the suit outside the lock sleeve of concentric drill bit to reaming piece axial spacing, the lock sleeve passes through locking system to be fixed on concentric drill bit, this device guarantees that the reaming piece locks, prevents that the reaming piece from dropping and become invalid, can accomplish in the complicated difficult geology of pore-forming such as loose rubble and sand cobble and hard withered stone creep into, and effective pore-forming, and the concentricity in hole is high.
Description
Technical Field
The utility model relates to a concentric pipe following drilling tool of reaming block type.
Background
In the current engineering drilling construction, a pipe-following drilling tool is widely applied to a down-the-hole drilling technology; the concentric drilling tool is usually constructed by adopting a reaming block type concentric drilling tool in drilling construction, and the existing reaming block type concentric drilling tool in the day before comprises a central drill bit, a rod stabilizer, a reaming block and a locking system, wherein the reaming block is usually a plurality of blocks which are arranged between the central drill bit and the rod stabilizer and are locked by the locking system (in a transverse pin and split pin mode); when the drilling tool is in a non-working state, the reaming block is in a furled state, when the drilling tool works, the central drill bit (or the reaming block) is in contact with the ground and is under the pressure of a rock stratum, the reaming block is expanded in a rotation engineering process to reach a working position, the reaming block is tightly attached to the central drill bit and the rod stabilizer at the moment, the step position of the rod stabilizer is in contact with the pipe shoe, impact force is transmitted to the following pipe, and the purpose of drilling and following is achieved. When the drilling tool is recovered, the drilling tool is lifted upwards (or lifted after being turned for a half circle), so that the hole expanding block is changed into a folded state, and the drilling tool is taken out. However, when the conventional reamer block type concentric drilling tool is used, the reamer block is easy to fall and fail due to abrasion and vibration of a drilling tool locking system, or the drilling tool is stuck to the drill or broken due to rock stratum change, so that a drilling tool which can complete drilling in a complex situation and has high reliability is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to prior art not enough the utility model provides a guarantee reamer piece locking, prevent that the reamer piece from dropping and become invalid, can accomplish in the geology of the complicated difficult pore-forming such as loose rubble and sand cobble and hard withered stone and creep into, and effective pore-forming, and the concentric follow pipe drilling tool of reamer piece formula that the concentricity in hole is high.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides a concentric pipe-following drilling tool of reaming piece formula, includes concentric drill bit, reaming piece, lock sleeve and locking system, the reaming piece passes through the rotation axis and installs in the rotation axis of concentric drill bit downthehole, the reaming piece is installed on concentric drill bit back and is spacing to the reaming piece axial through the lock sleeve of suit outside concentric drill bit, the lock sleeve passes through locking system to be fixed on concentric drill bit.
Furthermore, the locking system includes split pin and horizontal round pin, be equipped with two relative pinholes that communicate with the inner chamber on the lock sleeve, be equipped with on the concentric drill bit with pinhole position assorted cotter way, the lock sleeve suit is in the concentric drill bit back that targets in place, the one end of horizontal round pin penetrates from one of them pinhole, passes the cotter way, wears out from another pinhole, after wearing out horizontal round pin passes through the split pin and fixes in the cotter way.
Further, the head end of concentric drill bit comprises the concentric spline that sets up upper drill bit, lower floor's drill bit and tail end, lower floor's drill bit diameter is greater than the upper drill bit, the part of lower floor's drill bit protrusion upper drill bit forms the step, the first drilling face that the top surface of upper drill bit formed, the top surface outer circumference of upper drill bit is equipped with a chamfer, and the annular second drilling face of chamfer shape place face, the step constitutes the annular third drilling face of place face, the diameter of upper drill bit and the internal diameter phase-match of lock sleeve, first, second, the third drilling face is gone up and is arranged the columnar carbide.
Further, three through grooves arranged along the axial direction are symmetrically distributed on the outer wall of the upper drill bit by taking the upper drill bit axis as the center, so as to form a slag discharge groove, the lower drill bit is provided with a reaming block mounting groove communicated with the slag discharge groove at the position corresponding to each slag discharge groove on the outer wall protruding out of the upper drill bit part, the surface of the reaming block mounting groove facing the locking sleeve is the bottom surface, a rotating shaft hole is formed in the bottom surface of the reaming block mounting groove, and the reaming block is mounted in the rotating shaft hole through the rotating shaft.
Furthermore, the reaming block is provided with a sixth drilling surface, the sixth drilling surface is provided with columnar hard alloys in parallel, and two side surfaces of the reaming block are relatively close to each other at the end part to form an inclined surface.
Furthermore, the inner wall of the locking sleeve is provided with a lug, the upper drill bit of the concentric drill bit is provided with a groove matched with the lug, and one side of the groove is communicated with the slag discharge groove.
Furthermore, the top surface of the locking sleeve forms an annular fourth drilling surface, a chamfer is arranged on the outer circumference of the top surface of the locking sleeve, and the surface where the chamfer is located forms an annular fifth drilling surface.
Furthermore, the inner wall of the head end of the locking sleeve is provided with a first annular boss protruding towards the axis, the inner diameter of the first annular boss is matched with the outer diameter of an upper drill bit of the concentric drill bit, the outer wall of the upper drill bit of the concentric drill bit is provided with a second annular boss matched with the first annular boss, and the locking sleeve is sleeved on the outer side of the upper drill bit and then limits the sleeving depth of the locking sleeve through the first annular boss and the second annular boss.
In conclusion, the device can drive the wall protection pipe to drill for use under the geological working conditions that the rock stratum condition is complex or hard, the hole forming is difficult and the hole forming is difficult, and the slag discharge is smooth; can meet the engineering requirements of driving geothermal wells, micro-piles, small and medium-sized cast-in-place piles in buildings, water wells and the like; the service life of each part of the drilling tool is prolonged by a special surface treatment process, the high construction cost requirement of other drilling tool structures can be met, and the construction cost is reduced; the operation is simple and the disassembly is convenient when in use.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic structural view of the reaming block of the present invention in an operating state;
FIG. 4 is a schematic structural view of the reaming block of the present invention in a non-operating state;
in the figure: 1-concentric drill bit, 2-reaming block, 3-locking sleeve, 4-split pin, 5-transverse pin, 11-second annular boss, 12-groove, 13-rotating shaft hole, 14-pin groove, 15-slag discharge groove, 16-upper drill bit, 161-first drilling surface, 162-second drilling surface, 17-lower drill bit, 171-third drilling surface, 21-sixth drilling surface, 22-inclined surface, 23-rotating shaft, 31-fifth drilling surface, 32-fourth drilling surface, 33-lug and 34-first annular boss.
Detailed Description
The following detailed description of an embodiment of a reamer block type concentric casing drilling tool is provided with reference to the accompanying drawings and specific examples.
As shown in fig. 1 to 4, a reamer block type concentric casing drilling tool comprises a concentric drill bit 1, a reamer block 2, a locking sleeve 3, a split pin 4 and a transverse pin 5. The reaming block 2 is arranged in a rotating shaft hole 13 of the concentric drill bit 1 through a rotating shaft 23, the reaming block 2 is axially limited through a locking sleeve 3 sleeved outside the concentric drill bit 1, the locking sleeve 3 is locked with the concentric drill bit 1 through a split pin 4 and a transverse pin 5, specifically, two opposite pin holes communicated with an inner cavity are formed in the locking sleeve 3, a pin groove 14 matched with the pin hole is formed in the concentric drill bit 1, after the locking sleeve 3 is sleeved on the concentric drill bit 1 in place, one end of the transverse pin 5 penetrates through one pin hole, penetrates through the other pin hole through the pin groove 14 and is fixed through the split pin 4, when the drilling tool is prevented from rotating reversely, the concentric drill bit 1 is separated from the locking sleeve 3, when the locking sleeve 3 is assembled with the concentric drill bit 1, a locking device is formed, and the reaming block 2 is prevented from falling off when being opened and folded;
the concentric drill bit 1 is basically similar to the existing drill bit in structure, except that the head end of the concentric drill bit 1 is composed of an upper drill bit 16, a lower drill bit 17 and a spline at the tail end, the diameter of the lower drill bit 17 is larger than that of the upper drill bit 16, the part of the lower drill bit 17 protruding out of the upper drill bit 16 forms a step, a first drilling surface 161 formed on the top surface of the upper drill bit 16 is provided with a chamfer, the outer circumference of the top surface of the upper drill bit is provided with a chamfer, the chamfer is positioned on the annular second drilling surface 162, the step forms an annular third drilling surface 171, the diameter of the upper drill bit 17 is matched with the inner diameter of the locking sleeve 3, the first, second and third drilling surfaces are distributed with columnar cemented carbide, the first, second and third drilling surfaces are arranged in a positive rake angle, and the outer wall of the upper drill bit 16 on the outer wall of the upper drill bit 16 is centered on the axis of the upper drill bit 16, Central symmetry has laid along the three logical groove constitution row's of laying of axial slag chute 15, lower floor's drill bit 17 is equipped with the reaming piece mounting groove with row's slag chute intercommunication on the outer wall of protrusion upper drill bit 16 part, the position that every row's slag chute corresponds, reaming piece mounting groove is the bottom surface towards the lock sleeve face of being located, be equipped with on the bottom surface of reaming piece mounting groove with reaming piece 2 rotation axis 23 size assorted rotation axis hole 13, reaming piece 2 is installed through rotation axis 23 in the rotation axis hole 13.
The reaming block 2 is provided with a sixth drilling surface 21, columnar hard alloys are distributed on the sixth drilling surface 21 side by side, and the sixth drilling surface 21 is arranged by adopting a positive front angle; two side surfaces of the reaming block 2 are relatively close to each other at the end to form an inclined surface 22, the inclined surface is called a steering angle in the field, and the reaming block 2 is arranged at the steering angle, so that when the drill bit rotates, the shearing surface of the drill bit which is in contact with a rock stratum firstly and rotates is facilitated, and the drill sticking phenomenon can be effectively prevented; the reaming block is provided with a rotating shaft, the reaming block is opened and closed through the rotating shaft, when the drilling tool works, the reaming is opened in a forward rotation mode, and after the working is finished, the reaming block is recovered in a reverse rotation mode;
the inner wall of the locking sleeve 3 is provided with a lug 34, the upper layer drill bit 16 of the concentric drill bit 1 is provided with a groove 12 matched with the lug 34, one side of the groove 12 is communicated with a slag discharge groove, the lug 34 of the locking sleeve 3 enters the position of the groove 12 through the slag discharge groove, then the lug 34 is clamped in the groove 12 through rotation, the top surface of the locking sleeve 3 forms an annular fourth drilling surface 32, the outer circumference of the top surface of the locking sleeve 3 is provided with a chamfer, and the surface where the chamfer is located forms an annular fifth drilling surface 31; the locking sleeve 3 is mounted on the concentric drill bit 1 and in place, the first, second, fourth and fifth drilling surfaces form a front drilling surface as a whole, and the third and sixth drilling surfaces form a rear drilling surface as a whole.
The concentric drill bit 1 is provided with air holes, and the air passage distribution of the concentric drill bit is favorable for cleaning hole bottom rock slag and returning the rock slag to an orifice; the concentric drill bit 1 transmits rotary torque and power through splines at the tail end. The concentric drill bit 1 of the device is connected with the locking sleeve 3 to form a guide table of the drilling tool, the guide table has a guide function in work, and the reaming block 2 is provided with a steering angle, so that the reaming block is not easy to break due to the fact that the drilling tool is clamped due to the change of the rock stratum.
The inner wall of the head end of the locking sleeve 3 is provided with a first annular boss 33 protruding towards the axis, the inner diameter of the first annular boss 33 is matched with the outer diameter of an upper drill bit 16 of the concentric drill bit, a second annular boss 11 matched with the first annular boss 33 is arranged on the outer wall of the upper drill bit 16 of the concentric drill bit, and the locking sleeve 3 is sleeved on the outer side of the upper drill bit 16 and then the sleeving depth of the locking sleeve 3 is limited through the first annular boss 33 and the second annular boss 11.
During operation, after concentric drill bit 1 and reaming block 2 are assembled, the reaming block is fixed on concentric drill bit 1 through lock sleeve 3, and lock sleeve 3 is locked on concentric drill bit 1 through a locking system to prevent lock sleeve 3 from falling. After the assembly, the reamer block 2 can be folded and unfolded around the rotating shaft under the action of external force, so that the impact and the rotation of the crushed rock stratum are completed to form a hole. When the device is in a non-working state, the reaming block 2 is in a furled state; when the rotary drill bit works, the concentric drill bit 1 and the reaming block 2 are in contact with the ground and are subjected to the pressure of a rock stratum, the reaming block 2 is expanded in a rotary engineering to reach a working position, at the moment, the reaming block 2 is tightly attached to the concentric drill bit 1, and impact force and torque are transmitted to the rock stratum, so that the aim of crushing the rock stratum is fulfilled; when the drilling tool is recovered, the reverse rotation half circle is lifted again, so that the reaming block 2 is in a furled state, and the drilling tool is taken out.
The foregoing is a preferred embodiment of the present invention, but it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a concentric drilling tool with pipe which reams piece formula which characterized in that: including concentric drill bit, reaming piece, lock sleeve and locking system, the reaming piece passes through the rotation axis and installs in the rotation axis of concentric drill bit downthehole, the reaming piece is installed on concentric drill bit back and is spacing to the reaming piece axial through the lock sleeve of suit outside concentric drill bit, the lock sleeve passes through locking system to be fixed on concentric drill bit.
2. The reamer block type concentric casing drill of claim 1, wherein: the locking system comprises a cotter pin and a transverse pin, two opposite pin holes communicated with the inner cavity are formed in the locking sleeve, a pin groove matched with the pin holes in position is formed in the concentric drill bit, the locking sleeve is sleeved on the concentric drill bit in place, one end of the transverse pin penetrates through one pin hole, penetrates through the pin groove and penetrates out of the other pin hole, and the transverse pin penetrates through the cotter pin and is fixed in the pin hole.
3. The reamer block type concentric casing drill according to claim 1 or 2, wherein: the head end of concentric drill bit comprises the concentric spline that sets up upper drill bit, lower floor's drill bit and tail end, lower floor's drill bit diameter is greater than the upper drill bit, the part of lower floor's drill bit protrusion upper drill bit forms the step, the first drilling face that the top surface of upper drill bit formed, the circumference is equipped with a chamfer outside the top surface of upper drill bit, and the second drilling face that the chamfer formed ring shape, the step forms the annular third drilling face of shape of place, the diameter of upper drill bit and the internal diameter phase-match of lock sleeve, arrange the columnar order carbide on first, second, third drilling face.
4. The reamer block type concentric casing drill of claim 3, wherein: the outer wall of upper drill bit is laid with the three logical groove that lays along the axial and constitutes slag discharging groove above the upper drill bit axle center as center, central symmetry, lower floor's drill bit is equipped with the reaming piece mounting groove with slag discharging groove intercommunication on the outer wall of protrusion upper drill bit part, in the position that every slag discharging groove corresponds, reaming piece mounting groove is the bottom surface towards the lock sleeve place face, be equipped with the rotation axis hole on the bottom surface of reaming piece mounting groove, the reaming piece passes through the rotation axis and installs in the rotation axis hole.
5. The reamer block type concentric casing drill of claim 3, wherein: the reaming block is provided with a sixth drilling surface, the sixth drilling surface is provided with columnar hard alloys in parallel, and two side surfaces of the reaming block are relatively close to each other at the end part to form an inclined surface.
6. The reamer block type concentric casing drill of claim 4, wherein: the inner wall of the locking sleeve is provided with a lug, the upper drill bit of the concentric drill bit is provided with a groove matched with the lug, and one side of the groove is communicated with the slag discharge groove.
7. The reamer block type concentric casing drill of claim 3, wherein: the top surface of the locking sleeve forms an annular fourth drilling surface, a chamfer is arranged on the outer circumference of the top surface of the locking sleeve, and the surface where the chamfer is located forms an annular fifth drilling surface.
8. The reamer block type concentric casing drill of claim 1, wherein: the inner wall of the head end of the locking sleeve is provided with a first annular boss protruding towards the axis, the inner diameter of the first annular boss is matched with the outer diameter of an upper drill bit of the concentric drill bit, a second annular boss matched with the first annular boss is arranged on the outer wall of the upper drill bit of the concentric drill bit, and the locking sleeve is sleeved on the outer side of the upper drill bit and limits the sleeving depth of the locking sleeve through the first annular boss and the second annular boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221668.3U CN210714474U (en) | 2019-07-30 | 2019-07-30 | Reaming block type concentric pipe following drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221668.3U CN210714474U (en) | 2019-07-30 | 2019-07-30 | Reaming block type concentric pipe following drilling tool |
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| Publication Number | Publication Date |
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| CN210714474U true CN210714474U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921221668.3U Active CN210714474U (en) | 2019-07-30 | 2019-07-30 | Reaming block type concentric pipe following drilling tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439467A (en) * | 2019-07-30 | 2019-11-12 | 长沙天和钻具机械有限公司 | A kind of reaming block formula concentric simultaneous casing drilling tool |
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2019
- 2019-07-30 CN CN201921221668.3U patent/CN210714474U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439467A (en) * | 2019-07-30 | 2019-11-12 | 长沙天和钻具机械有限公司 | A kind of reaming block formula concentric simultaneous casing drilling tool |
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