CN210768601U - Eccentric hole diamond compact bit - Google Patents
Eccentric hole diamond compact bit Download PDFInfo
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- CN210768601U CN210768601U CN201920673293.8U CN201920673293U CN210768601U CN 210768601 U CN210768601 U CN 210768601U CN 201920673293 U CN201920673293 U CN 201920673293U CN 210768601 U CN210768601 U CN 210768601U
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- gas drainage
- eccentric
- hole
- diamond compact
- wing
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Abstract
The utility model discloses an eccentric hole diamond composite sheet drill bit, which comprises a drill body, diamond composite sheet cutting teeth, diamond composite sheet semi-gauge teeth, an alloy gauge strip, alloy reverse cutting teeth, and eccentric inclined gas drainage casing lower holes; the upper end of the drill body is provided with more than three wing parts through the mechanical balance principle, and the arrangement of the wing parts depends on the positions of the lower holes of the eccentric inclined gas drainage sleeve; the angle of the lower hole of the inclined gas drainage casing can be adjusted by the length of the hole, and a powder discharge groove is formed between the rotation tracks of the wing part of the drill body; the defects that the wing pieces fall off when the existing open-close type drill bit drills or the movable wing pieces cannot be opened when the casing is placed are overcome, after the drill bit finishes drilling, the gas drainage casing can penetrate through the axial through hole of the drill bit main body, the gas drainage casing can smoothly reach a drilling point through the axial through hole, and the situations that the existing technology is easy to clamp or cannot be pushed open and the like are avoided; thereby realize the inside gas drainage sleeve pipe of going down of drill bit, can put the gas drainage sleeve pipe under the condition of not carrying the brill, and then can guarantee that the gas drainage sleeve pipe is gone down to preset position, and the inclination of eccentric sleeve pipe lower cavity after the change adjustment is floated to the distance has been ignored.
Description
Technical Field
The utility model relates to a gas drainage drill bit field in the coal mining, concretely relates to eccentric gas drainage is with compound piece of diamond drill bit.
Background
In the coal mining process, gas in a coal seam needs to be pumped out; generally, after a hole is formed by drilling for the first time, the drill is lifted to a lower gas drainage casing; however, in the drilling process, the rock stratum falls off or the soft rock stratum collapses to block the hole, so that the gas drainage casing cannot be lowered to a predetermined place, and the gas cannot be pumped out; in the use process of the currently used openable drill bit, when the drill bit drills into hard rock, the central wing piece is easy to fall off or the phenomenon that the wing piece cannot be opened and the like can occur after the drilling is finished, so that the gas drainage casing pipe cannot be placed, and the labor intensity and the construction cost of workers are increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough that traditional drill bit exists, provide a novel eccentric orfice diamond compact piece drill bit.
The utility model provides a technical scheme as follows that above-mentioned technical problem took:
a novel eccentric hole diamond compact piece drill bit comprises: the device comprises a drill body, a diamond composite sheet cutting tooth, a diamond composite sheet half gauge protection tooth, an alloy gauge protection strip, an alloy reverse cutting tooth and an eccentric gas drainage casing discharge hole.
The upper end of the drill body is provided with three or more than three wings through a mechanical balance principle, the arrangement of the wings depends on the position of a lower hole of the eccentric gas drainage sleeve, and the stability and the guidance performance during drilling are balanced by the diameter of the drill bit and the diameter of the gas drainage sleeve.
Furthermore, the tops of the wings are provided with inlaying and welding grooves for diamond composite sheets, and the inlaying and welding grooves at the tops of the wings are respectively inlaid and welded with cutting teeth for the diamond composite sheets; a diamond compact half socket groove is arranged below the diamond compact cutting tooth, and the diamond compact half gauge protection tooth is embedded and welded; a powder discharge groove is formed between the rotation tracks of the drill body wings;
further, a powder discharge groove is formed between the rotation tracks of the drill body wings; the powder discharge groove is designed according to the dynamic flow principle, firstly, the powder discharge amount is increased through the eccentric hole, and secondly, the deepened water outlet groove and the annular space of the powder discharge groove are additionally arranged at the powder discharge groove of the widest wing, so that a central core generated by cutting a composite sheet adjacent to the inner side of the widest wing is smoothly discharged;
further, an alloy welding groove is formed in the outermost side of each wing, and a welding joint gold gauge bar is embedded in each welding groove;
further, reverse cutting teeth welded in a step shape are arranged below the outermost alloy strip of the wing;
further, the eccentric gas drainage casing is transferred the hole effect: firstly, the drill bit provides the passageway of coolant liquid when creeping into, secondly: the lower hole is used as a gas drainage casing;
further, the eccentric gas drainage casing lower hole leads the wing to have a widest wing through eccentricity, so that the diamond composite sheet of the widest wing adjacent to the circle center can cut rocks adjacent to the circle center when a drill bit drills, and the eccentric gas drainage casing lower hole is tangent to the inner side of each wing through mechanical balance design;
further, the width of the widest wing depends on the diameter of the generated central core, namely the size of an annular gap between the drill rod and the drill hole; (brittle unconsolidated rock formations, such as soft rock, coal, etc., which may be larger than the annular space, or hard rock, which is smaller than or equal to the annular space)
Further, the upper part of the eccentric gas drainage sleeve lower hole is tangent with the inner side of the wing, the circle center of the eccentric gas drainage sleeve lower hole deviates from the circle center of the nominal diameter of the drill bit, and the deviated circle center is connected with the circle center below the gas drainage sleeve through a distance to form an eccentric tangential inclined cylindrical through hole and an eccentric inclined gas drainage sleeve lower hole;
furthermore, the inclination of the lower hole of the eccentric gas drainage casing can solve the inclination problem by the length of the drill bit body or the addition of the special inclined drill rod inner hole;
after the technical scheme is adopted, the eccentric hole diamond compact bit is simple in structural design, and the defect that the movable wing piece cannot be opened when the wing piece falls off or the casing is lowered during drilling of the bit is overcome. After the drill bit finishes drilling, the gas drainage casing can penetrate through the axial through hole of the drill bit main body, and the gas drainage casing can smoothly reach a drilling point through the axial through hole, so that the situation that the gas drainage casing is easy to clamp or cannot be pushed open in the prior art is avoided; thereby realize the inside gas drainage sleeve pipe of going down of drill bit, can put the gas drainage sleeve pipe under the condition of not carrying the brill, and then can guarantee that the gas drainage sleeve pipe is gone down to preset position, and the inclination of eccentric sleeve pipe lower cavity after the change adjustment is floated to the distance has been ignored. The utility model provides a problem that exists when the drill bit is carried and is bored gas drainage sleeve pipe down, bore the inside gas drainage sleeve pipe down of body axial through-hole, and saved manufacturing cost, reduced workman's intensity of labour again.
Drawings
The present invention will be described in detail with reference to the accompanying drawings so that the above advantages of the present invention can be more clearly understood.
Fig. 1 is a schematic structural diagram of an eccentric hole diamond compact drill bit provided by an embodiment of the present invention.
Fig. 2 is a top view of an eccentric hole diamond compact drill bit according to an embodiment of the present invention.
Fig. 3 is a schematic side view of a wing according to an embodiment of the present invention.
Fig. 4 is a schematic front structural view of a diamond compact provided by an embodiment of the present invention.
Fig. 5 is a schematic side structure view of a diamond compact provided by an embodiment of the present invention.
Fig. 6 is a schematic front structural view of a diamond compact half piece provided by an embodiment of the present invention.
Fig. 7 is a schematic side view of a diamond compact half piece according to an embodiment of the present invention.
Fig. 8 is a schematic front structure view of an alloy gauge protection strip provided by an embodiment of the present invention.
Fig. 9 is a schematic side view of an alloy gauge strip according to an embodiment of the present invention.
Fig. 10 is a schematic front structural view of an alloy reverse cutting tooth according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of an alloy reverse cutting tooth flank according to an embodiment of the present invention.
In the figure: 1. a drill body; 2. a diamond compact cutting tooth; 3. alloy gauge protection strips; 4. the circle center of the lower hole; 5. a nominal diameter circle center; 6. a water outlet groove; 7. an annular space; 8. half gauge teeth; 9. a reverse cutting tooth; 10. an eccentric tilt angle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
An eccentric bore diamond compact drill bit, comprising: the diamond gauge protection device comprises a drill body 1, diamond compact cutting teeth 2, diamond compact half gauge protection teeth 8, alloy gauge protection strips 3 and alloy reverse cutting teeth 9.
Referring to the drawings, wherein FIG. 1/2 is a schematic diagram of the construction of an eccentric hole diamond compact drill bit of the present invention; FIG. 3 is a schematic side view of a blade of an eccentric hole diamond compact of the present invention; FIGS. 4-7 are schematic structural diagrams of diamond composite sheets of the present invention, and FIGS. 8-9 are schematic structural diagrams of the front and side surfaces of the alloy gauge protection strip of the present invention; FIGS. 10-11 are schematic front and side views of an alloy reverse cutting tooth according to the present invention;
according to the attached drawings, the wings of the eccentric hole diamond composite sheet drill bit are provided with inlaying and welding grooves of diamond composite sheets, and the top inlaying grooves of the wings are respectively inlaid and welded with diamond composite sheet cutting teeth 2; a diamond compact half socket is arranged below the diamond compact cutting teeth 2, and a diamond compact half gauge protection tooth 8 is embedded and welded;
a powder discharge groove is designed between the rotating tracks of the drill body wings by utilizing the position of the eccentric hole; by additionally arranging the deepened water outlet groove 6 and the annular space 7 of the powder discharge groove at the powder discharge groove of the widest wing, the powder discharge amount is reduced, so that a central core generated by cutting the composite sheet adjacent to the inner side of the widest wing can be smoothly discharged;
the welding joint gold gauge protection strip 3 is embedded in the outermost side welding groove of the wing; the alloy strip is provided with reverse cutting teeth 9 welded in a step shape;
the upper part of the lower hole of the eccentric gas drainage sleeve is tangent with the inner side of the wing, the circle center 4 of the lower hole is deviated from the circle center 5 of the nominal diameter of the drill bit, the deviated circle center is connected with the circle center below the gas drainage sleeve through a distance to form a cylindrical through hole with an eccentric inclination angle of 10 and the lower hole of the gas drainage sleeve with the eccentric inclination angle of 10;
the utility model has the advantages that after the technical scheme is adopted, the novel diamond composite sheet drill bit with simple structure and eccentric hole avoids the defect that the movable fin can not be opened when the fin falls off or the casing is put down when the drill bit drills, the gas drainage casing can pass through the axial through hole of the drill bit main body after the drill bit finishes drilling, the gas drainage casing can smoothly reach a drilling point through the axial through hole, and the situations of easy jamming/non-opening of the top and the like in the prior art are avoided; thereby realize the inside gas drainage sleeve pipe down of drill bit, can transfer the gas drainage sleeve pipe under the condition of not carrying the brill, and then can guarantee that the gas drainage sleeve pipe goes down preset position, and the gradient of discharge hole under the eccentric sleeve pipe after the adjustment of floating the distance has been ignored, the utility model discloses the problem that exists when the drill bit is solved the drill bit and is carried the gas drainage sleeve pipe under boring, and the inside gas drainage sleeve pipe down of driller axial through-hole, and saved manufacturing cost, reduced workman's intensity of labour again.
It should be noted that the above-mentioned embodiments are only exemplary, and those skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the invention.
It will be understood by those skilled in the art that the foregoing detailed description is for the purpose of illustration only and is not intended to limit the invention. The scope of the invention is defined by the claims and their equivalents.
Claims (3)
1. An eccentric hole diamond compact bit is characterized by comprising a bit body (1), diamond compact piece cutting teeth (2), diamond compact piece half gauge teeth (8), alloy gauge protection strips (3) and alloy reverse cutting teeth (9), wherein the bit body (1) is provided with three or more than three wings which are arranged at the upper end of the bit body, the tops of the wings are provided with inlaying and welding grooves of the diamond compact pieces, the diamond compact piece cutting teeth (2) are welded inside the inlaying grooves of the wing parts, powder discharge grooves are designed between wing rotating tracks by utilizing the positions of eccentric holes, annular spaces (7) which are formed by deepening water outlet grooves (6) and enlarging and arranging the powder discharge grooves are additionally arranged at the widest wing powder discharge grooves, the near powder discharge amount enables center cores generated by cutting the inner side of the widest wing to be smoothly discharged, the circle center 4 deviates from the circle center 5 of the nominal diameter of the bit, the deviated circle center is connected with the circle center below the gas drainage sleeve through a distance to form a cylindrical through hole with an eccentric inclination angle 10 and a gas drainage sleeve lower hole with the eccentric inclination angle 10.
2. The eccentric hole diamond compact drill bit according to claim 1, wherein the lower portion of the cutting tooth of the diamond compact is provided with a half socket, and a half gauge tooth of the diamond compact is embedded and welded in the half socket; and a powder discharge groove is formed between the drill body and the wing rotating track.
3. The eccentric hole diamond compact bit according to claim 1, wherein the outermost side of the wing is provided with an alloy welding groove, a gold gauge bar is embedded and welded in the welding groove, and the lower side of the alloy gauge bar is provided with a step-shaped welded alloy reverse cutting tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920673293.8U CN210768601U (en) | 2019-05-13 | 2019-05-13 | Eccentric hole diamond compact bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920673293.8U CN210768601U (en) | 2019-05-13 | 2019-05-13 | Eccentric hole diamond compact bit |
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| Publication Number | Publication Date |
|---|---|
| CN210768601U true CN210768601U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920673293.8U Active CN210768601U (en) | 2019-05-13 | 2019-05-13 | Eccentric hole diamond compact bit |
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| CN (1) | CN210768601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151017A (en) * | 2021-11-23 | 2022-03-08 | 中海石油(中国)有限公司 | Bionic eccentric polycrystalline diamond compact |
-
2019
- 2019-05-13 CN CN201920673293.8U patent/CN210768601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151017A (en) * | 2021-11-23 | 2022-03-08 | 中海石油(中国)有限公司 | Bionic eccentric polycrystalline diamond compact |
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