CN201206427Y - Expanding bit for well drilling - Google Patents
Expanding bit for well drilling Download PDFInfo
- Publication number
- CN201206427Y CN201206427Y CNU2008200588615U CN200820058861U CN201206427Y CN 201206427 Y CN201206427 Y CN 201206427Y CN U2008200588615 U CNU2008200588615 U CN U2008200588615U CN 200820058861 U CN200820058861 U CN 200820058861U CN 201206427 Y CN201206427 Y CN 201206427Y
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- CN
- China
- Prior art keywords
- drilling
- broaching
- drilling rod
- bit
- blade
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a broaching bit for drilling, relates to the technical field of drilling bits, and solves the technical problems of the prior drilling broaching bit that slag falls to the bottom of a drilled hole during the broaching operation, and the deslagging efficiency is low. The broaching bit comprises a drilling blade and a drilling rod used for driving the drilling blade; a guiding column which is coaxial with the drilling rod is arranged under the drilling rod; the outer diameter of the guiding column is slightly smaller than the aperture of the broached hole; a circle of the drilling blade in an umbrella shape is arranged on the periphery of the upper end of the guiding column; the drilling blade is composed of a plurality of fan-shaped broaching blade arms; at least one row of cutters are installed on the broaching blade arms; the drilling rod is hollow; and the broaching blade arms are provided with deslagging openings communicated with the cavity in the center of the drilling rod. By utilizing the drilling broaching bit, the deslagging efficiency can be enhanced, and the drilling broaching bit is especially suitable for broaching construction with the large diameter drilling method.
Description
Technical field
The utility model relates to the technology of drilling bit, particularly relate to a kind of in soil layer the technology of employed reaming bit during drilling well.
Background technology
Coal mine shaft lining is dug the mode that " boring method " that adopted generally is employing " one-level is crept in advance, the classification reaming " at present.When the classification reaming, use be that shape and structure are basic identical, and the diameter reaming bit bigger than upper level drill bit, this technology can be crept into bigbore pit shaft under drilling well rig moment of torsion condition of limited.Because the slag-drip opening of this drill bit all is arranged on the bit central place, and the dregs under the bit cutting all is scattered in around the drill bit when the classification reaming, during this structure makes that the dregs cut drops at the bottom of the hole that upper level holes, be difficult to discharge, had a strong impact on the deslagging efficient in the drilling process from the slag-drip opening of bit central.
The utility model content
At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides and a kind ofly can prevent that dregs from falling into and hole, and can very easily dregs be discharged, thereby can improve the reamer bit of bored well of deslagging efficient.
In order to solve the problems of the technologies described above, a kind of reamer bit of bored well provided by the utility model, comprise and bore cutter and be used to drive the drilling rod that bores cutter, it is characterized in that, described drilling rod has with the coaxial external diameter of drilling rod and is slightly less than (upper level) by the lead in reaming aperture, end periphery is established the brill cutter that a circle is umbrella on the lead, boring cutter is made up of many fan-shaped reaming tool arms, at least one row's cutter is housed on the described reaming tool arm, described drilling rod is a hollow, and described reaming tool arm is provided with the slag-drip opening through channel connection drilling rod center cavity.
Further, described slag-drip opening is located at fan-shaped reaming tool arm lower limb.
The reamer bit of bored well that the utility model provides, it bores cutter is made up of lead and fan-shaped reaming tool arm, and lead can not only play the guiding role in drilling process, and can prevent that dregs from falling at the bottom of the hole that upper level holes.And on the reaming tool arm, also be provided with the slag-drip opening of jointed rod hollow hole of centre, and can very easily dregs be absorbed to the hollow hole of centre of drilling rod by slag-drip opening and discharge, can improve deslagging efficient.
Description of drawings
Fig. 1 is the front view of the reamer bit of bored well of the utility model embodiment;
Fig. 2 is the upward view of the reamer bit of bored well of the utility model embodiment;
Fig. 3 is the schematic diagram in reamer bit of bored well when construction of the utility model embodiment.
The specific embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1-Figure 3, a kind of reamer bit of bored well that the utility model embodiment is provided, comprise and bore cutter and be used to drive the drilling rod 1 that bores cutter, it is characterized in that: described drilling rod 1 has with the coaxial external diameter of drilling rod 1 and is slightly less than (upper level) by the lead 2 in reaming aperture, end periphery is established the brill cutter that a circle is umbrella on the lead 2, boring cutter is made up of many fan-shaped reaming tool arms 3, described drilling rod 1 is a hollow, and described reaming tool arm 3 lower limbs are provided with the slag-drip opening 4 through channel connection drilling rod center cavity 5.
Many row's cutters are housed on the described reaming tool arm 3.
As shown in Figure 3, when wellbore construction, earlier with the intact upper level hole of common bit drills, the reaming bit of the present utility model that the diameter of changing lead 2 then is slightly less than the upper level aperture carries out the reaming construction, boring cutter cuts umbrella cover that the dregs that gets off forms along many fan-shaped reaming tool arms 3 and is scattered in and bores the knife-edge edge, lead 2 can prevent that dregs from falling at the bottom of the hole that upper level holes, be located at the slag-drip opening 4 of fan-shaped reaming tool arm 3 lower limbs dregs is collected the center cavity of afterwards delivering to drilling rod 1 by the passage on the fan-shaped reaming tool arm 3, and then dregs is discharged by anti-endless form.
Claims (2)
1, a kind of reamer bit of bored well, comprise and bore cutter and be used to drive the drilling rod that bores cutter, it is characterized in that, described drilling rod has external diameter and the lead that is cooperated by the reaming aperture, the brill cutter that a circle is umbrella is established in the lead upper end, bores cutter and is made up of at least one fan-shaped reaming tool arm, and at least one row's cutter is housed on the described reaming tool arm, described drilling rod is a hollow, and described reaming tool arm is provided with the slag-drip opening through channel connection drilling rod center cavity.
2, reamer bit of bored well according to claim 1 is characterized in that: described slag-drip opening is located at fan-shaped reaming tool arm lower limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200588615U CN201206427Y (en) | 2008-05-23 | 2008-05-23 | Expanding bit for well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200588615U CN201206427Y (en) | 2008-05-23 | 2008-05-23 | Expanding bit for well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201206427Y true CN201206427Y (en) | 2009-03-11 |
Family
ID=40465494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200588615U Expired - Lifetime CN201206427Y (en) | 2008-05-23 | 2008-05-23 | Expanding bit for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201206427Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109699376A (en) * | 2019-01-29 | 2019-05-03 | 张晓敏 | Forestry water retention cultivation fast growth |
-
2008
- 2008-05-23 CN CNU2008200588615U patent/CN201206427Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109699376A (en) * | 2019-01-29 | 2019-05-03 | 张晓敏 | Forestry water retention cultivation fast growth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee after: SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENGINEERING CO., LTD. Address before: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee before: Shanghai Guanglian Building Development Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090311 |
|
| CX01 | Expiry of patent term |