CN211144385U - Plug sweeping drill bit - Google Patents
Plug sweeping drill bit Download PDFInfo
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- CN211144385U CN211144385U CN201922096336.3U CN201922096336U CN211144385U CN 211144385 U CN211144385 U CN 211144385U CN 201922096336 U CN201922096336 U CN 201922096336U CN 211144385 U CN211144385 U CN 211144385U
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Abstract
The utility model relates to a sweep stopper drill bit, it includes: the drill bit body comprises an installation tail part, a truncated cone-shaped middle gauge part and a conical grinding part which are sequentially arranged along the drilling direction, and a plurality of first cutting teeth are fixedly arranged at the drilling end of the grinding part. The utility model discloses conical grinding portion can directly act on the cement silt stopper thing in the drilling, creeps into the in-process, and the convex surface of grinding portion receives the barrier influence less for it changes control to creep into the direction, has realized the more accurate target of the orbit of creeping into, has improved and has swept stopper efficiency, and need not adopt directional instrument and screw rod, practices thrift the cost, and economic benefits is better.
Description
Technical Field
The utility model belongs to the technical field of the probing, concretely relates to plug sweeping drill bit.
Background
The sweeping drill bit, namely the hole sweeping drill bit, is a tool for clearing silted materials in a drill hole or finishing the wall of the drill hole during geological drilling, and can provide guarantee for the stable work of a drilling tool through the action of the hole sweeping drill bit on the drill hole.
Geological drilling is generally carried out in such a way that grouting steps, plug sweeping steps, drilling steps and grouting steps are alternated. The grouting step can lead a large amount of cement to be accumulated in the drill hole, the compactness and hardness of the cement can be different along with the change of time, and the sweeping drill head is easy to deviate from the sweeping course when sweeping the drill hole. At present, the PDC wiper bit, the directional instrument and the screw are generally operated together, wherein the directional instrument can play a role in guiding. However, due to the uneven hardness of cement in the drill hole, the sweeping-plug drill bit is still easy to deviate from the sweeping course even if a directional instrument is adopted.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem and provide a sweep stopper drill bit, it can solve at present because the cement soft or hard degree is uneven in the drilling, sweeps the easy skew technical problem who cleans the course of stopper drill bit.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a wiper drill bit, comprising: the drill bit body comprises an installation tail part, a truncated cone-shaped middle gauge part and a conical grinding part which are sequentially arranged along the drilling direction, and a plurality of first cutting teeth are fixedly arranged at the drilling end of the grinding part.
The utility model has the advantages that:
(1) the conical grinding part of the utility model can directly act on the cement sludge in the drill hole, and the arc surface of the grinding part is less influenced by the barrier in the drilling process, so that the drilling direction is easier to control, the more accurate target of the drilling track is realized, and the plug sweeping efficiency is improved;
(2) the first cutting tooth of the utility model can ensure the drilling capability of the plug sweeping drill bit, and improve the drilling quality;
(3) the utility model discloses sweeping stopper drill bit need not adopt directional instrument and screw rod, practices thrift the cost, and economic benefits is better.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, a plurality of first blades with the exposed height of 2-5mm are arranged on the surface of the grinding part at intervals, the first blades extend along the drilling direction of the grinding part, and the first cutting teeth are embedded on the outer surface of the drilling end of each first blade. Furthermore, the exposed height of the first blade is 3-4 mm.
The beneficial effect of adopting the further scheme is that: the first blade is used for cutting and cutting the cementing material in the grinding cement siltation material outside the grinding part, so that the sweeping efficiency of the grinding part is improved; the exposure height of the first blade is limited to 2-5mm, so that the grinding capacity of the grinding part can be improved, the first blade is prevented from being influenced by too many obstacles, and the sweeping stability of the grinding part is improved.
Further, the maximum diameter of the grinding section is D1, the maximum diameter of the intermediate gauge section is D2, and D1 and D2 satisfy the relationships: 80mm is larger than or equal to D1 and larger than or equal to 50mm, and 152.4mm is larger than or equal to D1 and larger than or equal to 120 mm.
The beneficial effect of adopting the further scheme is that: the maximum diameter of the section of the grinding part is 80mm to 50mm, and the grinding part can be effectively matched with a soft layer of a cement silted object to be drilled, so that the influence of hard cement is reduced, and the sweeping effect is improved; the maximum diameter of the section of the gauge part is 152.4 mm-120 mm, so that the hole diameter can be effectively matched, and the guarantee is provided for the subsequent drilling step.
Further, the number of the first cutting teeth is 5-6.
The beneficial effect of adopting the further scheme is that: the cutting effect and the economic cost can be considered by limiting the number of the first cutting teeth.
Furthermore, a plurality of second blades with the exposure height of 2-5mm are arranged on the surface of the middle gauge at intervals, the second blades extend along the drilling direction, and second cutting teeth are inlaid on the outer surface of the drilling end of each second blade.
The beneficial effect of adopting the further scheme is that: the second blade is used for cutting the cementing material in the grinding cement silt outside the middle gauge part, so that the gauge protection effect of the middle gauge part is improved; the exposure height of the second blade is limited to be 2-5mm, the gauge protection capability of the middle gauge protection part can be improved, meanwhile, the second blade is prevented from being influenced too much by obstacles, and the sweeping and blocking stability is improved.
Further, the drill bit body is of a hollow structure, and a plurality of drilling fluid channels are arranged in the hollow structure; the drilling end of the grinding part is also provided with a plurality of liquid injection holes which penetrate through the grinding part, and the liquid injection holes are in one-to-one correspondence and communicated with the drilling fluid channels.
The beneficial effect of adopting the further scheme is that: through drilling fluid passageway and notes liquid hole, can pour into the drilling fluid into in sweeping the stopper in-process, the drilling fluid can play the effect of cooling and sweeping the stopper drill bit and washing drilling, helps sweeping going on smoothly of stopper.
Furthermore, a clamping groove and a water hole are further formed in the inner side of the liquid injection hole, and the water hole and the clamping groove can be detached and replaced.
The beneficial effect of adopting the further scheme is that: through the installation that the draw-in groove can be convenient and dismantle the water hole, the water hole can increase the impact force of injected liquid, helps improving the cleaning performance.
It can be understood that the water hole refers to an injection control member with an adjustable inner diameter, and the water hole can adjust hydraulic parameters by adjusting the inner diameter, so that the injection condition of the drilling fluid is controlled.
Further, the plug sweeping drill bit further comprises a connecting piece used for being connected with a power source, and one end of the connecting piece is fixedly connected with the installation tail portion.
The beneficial effect of adopting the further scheme is that: can conveniently sweep the stopper drill bit through the connecting piece and be connected with the power supply, simple structure, the installation is swift.
Further, the first cutting teeth are made of a fire diamond matrix or a PDC sintered body material.
Drawings
FIG. 1 is a schematic front view of a wiper bit according to the present invention;
FIG. 2 is a schematic sectional view of the wiper bit of the present invention taken along the direction A-A;
fig. 3 is a left side view of the plug sweeping drill of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
2. a drill bit body; 4. mounting the tail part; 6. an intermediate gauge section; 8. a grinding section; 10. a first cutting tooth; 12. a first blade; 14. a second cutting tooth; 16. a second blade; 18. a drilling fluid passage; 20. a liquid injection hole; 22. a card slot; 24. a connecting member; 32. and (4) water eyes.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be further described with reference to the accompanying drawings 1-3:
in a first mode
The present invention provides a wiper drill bit, which is combined with fig. 1 to 3, and comprises: the drill bit comprises a drill bit body 2 and first cutting teeth 10, wherein the drill bit body 2 comprises an installation tail part 4, a truncated cone-shaped middle gauge part 6 and a conical grinding part 8 which are sequentially arranged along the drilling direction, and a plurality of first cutting teeth 10 are fixedly arranged on the drilling end of the grinding part 8.
This mode can be solved at present because cement hardness in the drilling is uneven, sweeps the technical problem that the stopper drill bit is skew easily and cleans the course.
In the mode, the conical grinding part 8 can directly act on cement siltation substances in the drill hole, and the arc surface of the grinding part 8 is less influenced by obstacles in the drilling process, so that the drilling direction is easier to control, the aim of more accurate drilling track is fulfilled, and the plug sweeping efficiency is improved; the first cutting teeth 10 can ensure the drilling capability of the plug-sweeping drill bit, and the drilling quality is improved; the plug sweeping drill bit does not need a directional instrument and a screw rod, so that the cost is saved, and the economic benefit is better.
In order to improve the cleaning effect of the grinding part 8, a plurality of first blades 12 with the exposed height of 2-5mm are further arranged on the surface of the grinding part 8 at intervals, the first blades 12 extend along the drilling direction of the grinding part 8, and the first cutting teeth 10 are embedded on the outer surface of the drilling end of the first blades 12.
In this way, the first blade 12 is used to cut off the cement in the grinding cement sludge outside the grinding portion 8, improving the sweeping efficiency of the grinding portion 8; the exposure height of the first blade 12 is limited to 2-5mm, which can improve the grinding capacity of the grinding part 8, prevent the first blade 12 from being influenced by too much obstacles, and improve the cleaning stability of the grinding part 8.
In order to meet the requirement of drilling, the maximum diameter of the section of the grinding part 8 is D1, the maximum diameter of the section of the intermediate gauge part 6 is D2, and D1 and D2 respectively satisfy the following relations: 80mm is larger than or equal to D1 and larger than or equal to 50mm, and 152.4mm is larger than or equal to D1 and larger than or equal to 120 mm.
Therefore, the maximum diameter of the section of the grinding part 8 is 80mm to 50mm, and the soft layer of the cement silted object to be drilled can be effectively matched, so that the influence of hard cement is reduced, and the sweeping effect is improved; the maximum diameter of the section of the gauge part is 152.4 mm-120 mm, so that the hole diameter can be effectively matched, and the guarantee is provided for the subsequent drilling step.
It will be appreciated that the first cutting teeth 10 are 5-6 in number. The cutting effect and the economical cost can be considered by limiting the number of the first cutting teeth 10. The number of the first blade wings 12 can also be 5-6, and the first cutting teeth 10 correspond to the number of the first blade wings 12 one by one.
In order to improve the gauge protection effect of the intermediate gauge 6, a plurality of second blades 16 with the exposure height of 2-5mm are further arranged on the surface of the intermediate gauge 6 at intervals, the second blades 16 extend along the drilling direction, and second cutting teeth 14 are embedded on the outer surface of the drilling end of each second blade 16.
In this way, the second blade 16 is used to cut the cement in the grinding cement sludge outside the intermediate gauge 6, improving the gauge effect of the intermediate gauge 6; the exposed height of the second blade 16 is limited to 2-5mm, so that the gauge protection capability of the intermediate gauge 6 can be improved, the second blade 16 is prevented from being influenced by obstacles too much, and the sweeping stability is improved.
The first cutting tooth 10 is made of a fire diamond matrix or a PDC sintered body material. Similarly, the second cutting tooth 14 may be made of a fire diamond matrix or a sintered PDC material. Specifically, in this embodiment, each of the first cutting teeth and the second cutting teeth 14 is made of a fire diamond matrix. In addition, to ensure strength, the first blade 12 and the second blade 16 are made of alloy materials.
It should be noted that the form of the wiper bit of the present invention is very versatile and several alternatives are provided below.
Mode two
The difference between this mode and the first mode is that, with reference to fig. 1 to 3, the drill bit body 2 is a hollow structure, and a plurality of drilling fluid channels 18 are arranged in the hollow structure; and the drilling end of the grinding part 8 is also provided with a plurality of liquid injection holes 20 which penetrate through the grinding part 8, and the liquid injection holes 20 are in one-to-one correspondence and communication with the drilling fluid channels 18.
Therefore, through the drilling fluid channel 18 and the liquid injection hole 20, drilling fluid can be injected in the plug sweeping process, and the drilling fluid can play a role in cooling a plug sweeping drill bit and cleaning a drill hole, so that smooth plug sweeping is facilitated.
In order to improve the cleaning effect, a clamping groove 22 and a water hole 32 are further arranged on the inner side of the liquid injection hole 20, and the water hole 32 is detachably connected with the clamping groove 22.
Thus, the water hole 32 can be conveniently mounted and dismounted through the clamping groove 22, and the water hole 32 can increase the impact force of injected liquid and is beneficial to improving the cleaning effect.
Wherein, in order to ensure the saving of drilling fluid, the number of the drilling fluid channels 18 can be selected to be 8-10, and the aperture of the liquid injection hole 20 can be selected to be 10-12 mm.
Mode III
The difference between this mode and the first mode is that, with reference to fig. 1 to 3, the wiper drill bit further includes a connecting member 24 for connecting a power source, and one end of the connecting member 24 is fixedly connected to the mounting tail 4. Specifically, the connector 24 may be a male connector 24, or may be a threaded connector 24.
The plug sweeping drill bit can be conveniently connected with a power source through the connecting piece 24, the structure is simple, and the installation is rapid.
The working principle and the steps are as follows:
in the grouting step, a large amount of cement silted matters are accumulated in the drill hole, and along with the change of time, the whole cement silted matters are in a state that the middle part is loose and soft, and the peripheral part is dense and hard. After the drill bit body 2 of this mode is connected with the power supply through connecting piece 24 and is accomplished, conical grinding portion 8 direct alignment above-mentioned cement silts up the mid portion of thing and acts on, and conical grinding portion 8 can creep into gradually along the extension orbit of mid portion, even do not have directional instrument and screw rod and also can realize directional sweeping the stopper comparatively accurately, convenient and practical, efficiency is higher.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A wiper drill bit, comprising: the drill bit comprises a drill bit body (2) and first cutting teeth (10), wherein the drill bit body (2) comprises an installation tail part (4), a truncated cone-shaped middle gauge part (6) and a conical grinding part (8) which are sequentially arranged along the drilling direction, and the drilling end of the grinding part (8) is fixedly provided with a plurality of first cutting teeth (10).
2. The wiper bit according to claim 1, wherein the grinding portion (8) is further provided with a plurality of first blades (12) spaced apart from each other at an exposed height of 2-5mm, the first blades (12) extending in a drilling direction of the grinding portion (8), and the first cutting teeth (10) are embedded in an outer surface of a drilling end of the first blades (12).
3. The wiper bit according to claim 1, wherein the maximum diameter of the cross-section of the grinding section (8) is D1, the maximum diameter of the cross-section of the intermediate gauge section (6) is D2, and the D1 and D2 satisfy the relationships: 80mm is larger than or equal to D1 and larger than or equal to 50mm, and 152.4mm is larger than or equal to D1 and larger than or equal to 120 mm.
4. The wiper bit according to claim 1, wherein the number of first cutting teeth (10) is 5-6.
5. The wiper bit according to claim 1, wherein a plurality of second blades (16) having a height of 2-5mm are spaced apart from each other on the surface of the intermediate gauge (6), the second blades (16) extending in the drilling direction, and the second cutting teeth (14) are embedded on the outer surface of the drilling end of the second blades (16).
6. A wiper bit according to any of claims 1 to 5, characterized in that the bit body (2) is a hollow structure, wherein several drilling fluid channels (18) are arranged inside the hollow structure; the drilling end of the grinding part (8) is further provided with a plurality of liquid injection holes (20) which penetrate through the grinding part (8), and the liquid injection holes (20) are in one-to-one correspondence and communicated with the drilling fluid channels (18).
7. The plug sweeping drill bit according to claim 6, characterized in that a clamping groove (22) and a water hole (32) are further arranged on the inner side of the liquid injection hole (20), and the water hole (32) and the clamping groove (22) can be detachably replaced.
8. The wiper bit according to any one of claims 1 to 5, further comprising a connector (24) for connecting a power source, wherein one end of the connector (24) is fixedly connected to the mounting tail (4).
9. The wiper bit according to any of claims 1 to 5, wherein the first cutting tooth (10) is made of a fire diamond matrix or PDC sintered body material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922096336.3U CN211144385U (en) | 2019-11-28 | 2019-11-28 | Plug sweeping drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922096336.3U CN211144385U (en) | 2019-11-28 | 2019-11-28 | Plug sweeping drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211144385U true CN211144385U (en) | 2020-07-31 |
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ID=71745861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922096336.3U Active CN211144385U (en) | 2019-11-28 | 2019-11-28 | Plug sweeping drill bit |
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|---|---|
| CN (1) | CN211144385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404456A (en) * | 2021-07-30 | 2021-09-17 | 中国石油化工股份有限公司 | Process method suitable for drilling soluble bridge plug for shale gas well |
-
2019
- 2019-11-28 CN CN201922096336.3U patent/CN211144385U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404456A (en) * | 2021-07-30 | 2021-09-17 | 中国石油化工股份有限公司 | Process method suitable for drilling soluble bridge plug for shale gas well |
| CN113404456B (en) * | 2021-07-30 | 2023-02-28 | 中国石油化工股份有限公司 | Process method suitable for drilling soluble bridge plug for shale gas well |
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