CN212743893U - Double-liquid rotary jet drill bit - Google Patents
Double-liquid rotary jet drill bit Download PDFInfo
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- CN212743893U CN212743893U CN202021422132.0U CN202021422132U CN212743893U CN 212743893 U CN212743893 U CN 212743893U CN 202021422132 U CN202021422132 U CN 202021422132U CN 212743893 U CN212743893 U CN 212743893U
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- drill bit
- fluid
- inner drill
- connecting piece
- fluid valve
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Abstract
The utility model provides a biliquid jet rotary drill bit, the drill bit forms the route of first fluid through cavity inner drill rod, cavity inner drill bit connecting piece and inner drill bit inner chamber, and outer drill bit cup joints outside cavity inner drill bit connecting piece and inner drill bit, and the annular clearance between them, the annular clearance that communicates between outer drill rod and inner drill rod forms the route of second fluid; the first fluid valve penetrates through the upper portion of the inner drill bit and the middle portion of the outer drill bit and is vertically communicated with the first fluid passage, the second fluid valve is located on the upper side and the lower side of the first fluid valve and penetrates through the middle portion of the outer drill bit and is vertically communicated with the second fluid passage, and double-fluid rotary spraying is conducted through the two valve bodies. The utility model discloses utilize the high pressure performance of biliquid when spouting soon, the lower fluid of pressure combines the cutting of higher pressure fluid and the infiltration of lower pressure fluid with the help of the higher fluid's of pressure impact force, accomplishes the reinforcement to drilling in different positions, does not confine to vertical direction, and better completion spouts soon and drilling is consolidated, has improved and has spouted the effect soon.
Description
Technical Field
The utility model belongs to drilling tool equipment field, concretely relates to biliquid spouts drill bit soon.
Background
In the building engineering, the foundation is the most important, especially in the large-scale projects such as tunnel, sea filling, etc., a waterproof curtain or a support pile needs to be built, or multi-directional drilling is carried out, and a single-liquid or double-liquid rotary jet drilling tool is usually adopted. In the prior art, a single-fluid or double-fluid rotary jet drilling tool is generally provided with a fluid conveying pipeline in the drilling tool, the pipeline is communicated with a drill bit, and a nozzle is arranged at the drill bit. For the double-fluid rotary jet drilling tool, two nozzles are generally arranged on the upper portion and the lower portion of the drill bit respectively, and are used for jetting two fluids respectively, and the two nozzles correspond to the two conveying pipelines respectively. However, such nozzles are only used as nozzles for the fluids, and do not affect each other, and one of the fluids cannot be impacted by the other fluid, so that the high-pressure performance of the two fluids cannot be utilized well, and the swirling effect is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a two liquid jet-grouting drill bits, the high pressure performance of make full use of two liquid when spouting soon, the lower fluid of pressure combines the cutting of higher pressure fluid and the infiltration of lower pressure fluid with the help of the higher fluid's of pressure impact force, accomplishes the reinforcement to drilling in different positions, is not restricted to vertical direction, and better completion spouts soon and drilling is consolidated, improves and spouts the effect soon.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a biliquid rotary jet drill bit, comprising: the drill bit comprises an outer drill bit, an inner drill bit, a second fluid valve, a first fluid valve, a hollow inner drill bit connecting piece and a sealing piece; wherein the content of the first and second substances,
one end of the hollow inner drill bit connecting piece is fixedly connected with the hollow inner drill rod, the other end of the hollow inner drill bit connecting piece is fixedly connected with the inner drill bit, and a first fluid passage is formed from the hollow inner drill rod, the hollow inner drill bit connecting piece, the inner cavity of the inner drill bit to the bottom of the inner drill bit;
the outer drill bit is sleeved outside the hollow inner drill bit connecting piece and the inner drill bit and is fixedly connected with an outer drill rod outside the inner drill rod, and an annular gap between the outer drill bit and the hollow inner drill bit connecting piece as well as the inner drill bit is communicated with the annular gap between the outer drill rod and the inner drill rod to form a passage of a second fluid;
the first fluid valve penetrates through the upper part of the inner drill bit and the middle part of the outer drill bit and is vertically communicated with the first fluid passage; the second fluid valves are positioned on the upper side and the lower side of the first fluid valve, penetrate through the middle part of the outer drill bit and are vertically communicated with the second fluid passage;
the sealing element seals a first fluid passage from below the first fluid valve of the inner drill bit to the bottom of the inner drill bit when the rotary spraying operation is performed.
In the above scheme, the fixed connection is detachable connection.
In the scheme, the two end faces of the fixed connection are provided with the corresponding sawtooth-shaped clamping grooves, and the detachable connection is carried out in a sawtooth meshing mode.
In the scheme, the upper end of the outer drill bit is provided with an outer drill rod positioning groove; and an inner drill rod positioning groove is formed in the upper end of the hollow inner drill bit connecting piece.
In the above scheme, the number of the first fluid valves is at least two, and the first fluid valves are uniformly distributed in the cross section direction of the drilling tool; the second fluid valves are at least two and are uniformly distributed in the cross-sectional direction of the drilling tool.
In the scheme, at least two rectangular grooves are formed in the part, penetrating through the first fluid valve and the second fluid valve, of the middle of the outer drill bit, and the nozzle of the first fluid valve and the nozzle of the second fluid valve are arranged in the grooves.
In the above scheme, the rectangular grooves are uniformly distributed on the periphery of the outer drill bit.
In summary, in the double-fluid rotary jet drill bit according to the embodiment of the present invention, the hollow inner drill rod, the hollow inner drill connecting member and the inner drill cavity form a first fluid passage; the outer drill bit is sleeved outside the hollow inner drill bit connecting piece and the inner drill bit and is fixedly connected with an outer drill rod outside the inner drill rod, and an annular gap between the outer drill bit and the hollow inner drill bit connecting piece as well as the inner drill bit is communicated with the annular gap between the outer drill rod and the inner drill rod to form a passage of a second fluid; the first fluid valve penetrates through the upper part of the inner drill bit and the middle part of the outer drill bit and is vertically communicated with the first fluid passage; the second fluid valves are positioned on the upper side and the lower side of the first fluid valve, penetrate through the middle part of the outer drill bit and are vertically communicated with the second fluid passage; the seal seals a passage below the first fluid valve of the inner bit during a rotary jetting operation. The utility model discloses the high pressure performance of make full use of biliquid when spouting soon, the lower fluid of pressure combines the cutting of higher pressure fluid and the infiltration of lower pressure fluid with the help of the higher fluid's of pressure impact force, accomplishes the reinforcement to drilling in different positions, does not confine to vertical direction, and better completion spouts soon and drilling reinforcement, improves and spouts the effect soon.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a dual-fluid rotary jet drill bit according to an embodiment of the present invention;
fig. 2 is a plan view of a portion a in fig. 1.
Description of reference numerals:
1. an outer drill bit; 2. an inner drill bit; 3. a second fluid valve; 31. a first fluid valve spout; 4. a second fluid valve; 41. a second fluid valve spout; 5. a hollow inner bit connector; 6. an outer drill rod positioning groove; 7. an inner drill rod positioning groove; 8. and a seal.
Detailed Description
The technical problems, technical solutions and advantages of the present invention will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings. The exemplary embodiments described below are only for explaining the present invention and should not be construed as limiting the present invention. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the utility model provides a biliquid spouts drill bit soon, the embodiment is shown in figure 1 biliquid spouts drill bit schematic structure soon. As shown in fig. 1, the double-fluid rotary jet drill comprises: an outer drill bit 1, an inner drill bit 2, a second fluid valve 3, a first fluid valve 4, a hollow inner drill bit connector 5 and a seal 8. One end of the hollow inner drill bit connecting piece 5 is fixedly connected with the hollow inner drill rod, the other end of the hollow inner drill bit connecting piece is fixedly connected with the inner drill bit 2, and a first fluid passage is formed from the hollow inner drill rod, the hollow inner drill bit connecting piece 5, the inner cavity of the inner drill bit 2 to the bottom of the inner drill bit; the outer drill bit 1 is sleeved outside the hollow inner drill bit connecting piece 5 and the inner drill bit 2 and is fixedly connected with an outer drill rod outside the inner drill rod, and an annular gap between the outer drill bit 1 and the hollow inner drill bit connecting piece 5 and the inner drill bit 2 is communicated with the annular gap between the outer drill rod and the inner drill rod to form a passage of a second fluid. The first fluid valve 4 penetrates through the upper part of the inner drill bit and the middle part of the outer drill bit and is vertically communicated with the first fluid passage; the second fluid valves 3 are positioned at the upper side and the lower side of the first fluid valve 4, penetrate through the middle part of the outer drill bit and are vertically communicated with the second fluid passage. The seal 8 seals a first fluid passage from below the inner bit first fluid valve 4 to the bottom of the inner bit during the rotary jetting operation. Preferably, the sealing member 8 is made of rubber.
In the embodiment, the upper end of the outer drill bit 1 is provided with an outer drill rod positioning groove 6; and an inner drill rod positioning groove 7 is arranged at the upper end of the hollow inner drill bit connecting piece 5.
In the above-mentioned embodiments, the fixed connection is a detachable connection. Preferably, both ends of the fixed connection are provided with saw-toothed clamping grooves which are connected in a meshing manner. The inner drill bit, the outer drill bit and the connecting piece which are connected in a detachable mode can be conveniently detached. When the fluid in the device is blocked, the device can be repaired without replacement through disassembly and cleaning.
Fig. 2 is a plan view of a portion a in fig. 1. As shown in fig. 2, the portion of the outer drill bit 1 through which the first fluid valve 4 and the second fluid valve 3 extend has at least two rectangular grooves, and the nozzle 41 of the first fluid valve 4 and the nozzle 31 of the second fluid valve 3 are disposed in the grooves. The rectangular grooves are uniformly distributed on the periphery of the outer drill bit. Correspondingly, the number of the first fluid valves is at least two, and the first fluid valves are uniformly distributed in the cross section direction of the drilling tool; the second fluid valves are at least two and are uniformly distributed in the cross-sectional direction of the drilling tool.
The fluid valve is internally provided with a drilling tool for jetting high-pressure fluid in a rotating mode. Preferably, the first high pressure fluid is high pressure water and the second high pressure fluid is a high pressure cement slurry. The high pressure here is greater than the normal water pressure. Preferably, the high pressure in the present embodiment is 10 to 40 MPa.
When the dual-fluid jet rotary drill bit is used for jet rotary drilling, the first fluid can have higher pressure than the second fluid. When drilling, the first fluid can be sprayed into the bottom of the drilling hole through the bottom of the drill bit; when rotary spraying operation is carried out, the sealing piece 8 is placed in the hollow part of the inner drill bit below the first fluid valve, the first fluid passage at the lower part of the inner drill bit is blocked, and the first fluid flows through the hollow inner drill wall and the hollow inner drill bit connecting piece to enter the first fluid valve and is sprayed out from the middle part of the outer drill bit perpendicular to the drill rod. The first fluid has higher pressure and stronger jet impact force; the second fluid has lower pressure, is sprayed out from the upper side and the lower side of the first fluid, and is easier to permeate into the hole wall by means of the impact force of the first fluid on the hole wall. Meanwhile, the two fluids are mixed to complete the reinforcement of the drill hole.
The present invention has been described in detail with reference to the embodiments, but the description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. The protection scope of the present invention is defined by the claims. Technical scheme, or technical personnel in the field are in the utility model technical scheme's inspiration the utility model discloses an essence and protection within range, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change that application scope was made and improve etc. all should still belong to within the protection scope is covered to the patent of the utility model. It should be noted that for the sake of clarity, parts of the description of the invention have been omitted which do not have a direct obvious relationship with the scope of protection of the invention, but which are known to the skilled person.
Claims (7)
1. The utility model provides a biliquid spouts drill bit soon which characterized in that, biliquid spouts drill bit soon includes: the drill bit comprises an outer drill bit, an inner drill bit, a second fluid valve, a first fluid valve, a hollow inner drill bit connecting piece and a sealing piece; wherein the content of the first and second substances,
one end of the hollow inner drill bit connecting piece is fixedly connected with the hollow inner drill rod, the other end of the hollow inner drill bit connecting piece is fixedly connected with the inner drill bit, and a first fluid passage is formed from the hollow inner drill rod, the hollow inner drill bit connecting piece, the inner cavity of the inner drill bit to the bottom of the inner drill bit;
the outer drill bit is sleeved outside the hollow inner drill bit connecting piece and the inner drill bit and is fixedly connected with an outer drill rod outside the inner drill rod, and an annular gap between the outer drill bit and the hollow inner drill bit connecting piece as well as the inner drill bit is communicated with the annular gap between the outer drill rod and the inner drill rod to form a passage of a second fluid;
the first fluid valve penetrates through the upper part of the inner drill bit and the middle part of the outer drill bit and is vertically communicated with the first fluid passage; the second fluid valves are positioned on the upper side and the lower side of the first fluid valve, penetrate through the middle part of the outer drill bit and are vertically communicated with a passage of the second fluid;
the sealing element seals a first fluid passage from below the first fluid valve of the inner drill bit to the bottom of the inner drill bit when the rotary spraying operation is performed.
2. The dual fluid jet rotary drill bit of claim 1, wherein the fixed connection is a detachable fixed connection.
3. The dual-fluid rotary jet drill bit as claimed in claim 2, wherein the two end faces of the fixed connection are provided with corresponding saw-toothed slots for detachable connection by means of saw-toothed engagement.
4. The dual fluid rotary jet drill bit of claim 1, wherein an outer drill rod positioning slot is provided at an upper end of the outer drill bit; and an inner drill rod positioning groove is formed in the upper end of the hollow inner drill bit connecting piece.
5. The dual fluid rotary jet drill bit of claim 1, wherein the first fluid valves are at least two and are uniformly distributed in a cross-sectional direction of the drilling tool; the second fluid valves are at least two and are uniformly distributed in the cross-sectional direction of the drilling tool.
6. The dual-fluid rotary jet drill bit as claimed in any one of claims 1 to 5, wherein the portion of the outer drill bit through which the first fluid valve and the second fluid valve extend has at least two rectangular grooves, and the nozzle of the first fluid valve and the nozzle of the second fluid valve are disposed in the grooves.
7. The dual fluid jet rotary drill bit of claim 6, wherein the rectangular recesses are evenly distributed around the outer circumference of the outer drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422132.0U CN212743893U (en) | 2020-07-17 | 2020-07-17 | Double-liquid rotary jet drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422132.0U CN212743893U (en) | 2020-07-17 | 2020-07-17 | Double-liquid rotary jet drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212743893U true CN212743893U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021422132.0U Active CN212743893U (en) | 2020-07-17 | 2020-07-17 | Double-liquid rotary jet drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212743893U (en) |
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2020
- 2020-07-17 CN CN202021422132.0U patent/CN212743893U/en active Active
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