CN202954741U - Concentric casing drilling tool - Google Patents
Concentric casing drilling tool Download PDFInfo
- Publication number
- CN202954741U CN202954741U CN 201220705532 CN201220705532U CN202954741U CN 202954741 U CN202954741 U CN 202954741U CN 201220705532 CN201220705532 CN 201220705532 CN 201220705532 U CN201220705532 U CN 201220705532U CN 202954741 U CN202954741 U CN 202954741U
- Authority
- CN
- China
- Prior art keywords
- drilling tool
- connector
- reamer
- reamer sheet
- center bit
- Prior art date
- 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 relates to a drilling tool, and particularly relates to a concentric casing drilling tool. The concentric casing drilling tool comprises a connector (1), wherein a central drill bit (2) is slidably connected to the connector (1); an arc groove is formed in the connector (1); at least two reaming drill sheets (3) are uniformly distributed between the connector (1) and the central drill bit (2) along the central drill bit (2); the roots of the reaming drill sheets (3) are arranged in the arc grooves; a bulge (4) is arranged on the end part of the connector (1) between the two adjacent reaming drill sheets (3); and the both sides of the bulge (4) are next to the reaming drill sheets (3). During the rotation of the concentric casing drilling tool, the reaming drill sheets (3) are clamped by the bulge (4) in a tangential direction, so that the reaming drill sheets (3) do not swing along the tangential direction, thus preventing the reaming drill sheets (3) from being fractured due to tangential impact swinging.
Description
Technical field
The utility model relates to a kind of drilling tool, particularly a kind of concentric simultaneous casing drilling tool.
Background technology
In building operations, with pipe bit, advancing with one heart is to creep into the technical new drilling technology grown up at down-the-hole, be characterized in being difficult for successfully creeping in the geology of pore-forming in hard stone and the complexity such as loose crushing and sandy gravel of pluging with molten metal, and effective pore-forming, and the concentricity in hole is high.
In advancing construction with pipe bit with one heart, be to adopt concentric simultaneous casing drilling tool to be crept into, current concentric simultaneous casing drilling tool is mainly to comprise connector, center bit and reamer sheet, and the reamer sheet is generally polylith and uniform being arranged between connector and center bit centered by center bit, drilling tool reamer sheet when not working is contraction-like, when drilling tool is worked, when center bit touches ground and is under pressure, the center bit moving reamer sheet of shipper pole that makes progress outwards extends, until center bit and reamer sheet all reach operating position, now center bit and connector clamp the reamer sheet, the middle part halfpace of connector contacts with the shoe of steel pipe, when impact force is passed to steel pipe, reach the purpose that boring and steel pipe follow up simultaneously, when needs reclaim drilling tool, upwards mention drilling tool, the effect that center bit is subject to the extruding force of self gravitation and reamer sheet moves down, the reamer sheet becomes contraction state, take out drilling tool.
Adopt this drilling tool, when drilling tool creeps into, the coincidence with joint efforts of reamer sheet and center bit, on the same center line, makes rig little without swing, moment of torsion, becomes hole circle.But because the reamer sheet is clipped between connector and center bit, when work, rely on connector and center bit to clamp, so when drilling tool rotates, ground sandstones etc. cause the reamer sheet to swing on the circumferencial direction along center bit to the tangential impact power of reamer sheet, make the reamer sheet usually be fractureed due to impact.
So, need at present a kind of concentric simultaneous casing drilling tool that can effectively prevent that the reamer sheet from being fractureed owing to impacting swing badly.
The utility model content
The purpose of this utility model is: what for prior art, exist produces the swing along the center bit circumferencial direction due to the reamer sheet being subject to tangential impact, the deficiency that makes the reamer sheet easily be fractureed due to impact, provide a kind of and can effectively prevent that the reamer sheet is owing to impacting the concentric simultaneous casing drilling tool that swings and fractureed.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of concentric simultaneous casing drilling tool, comprise: connector, slidably connect center bit on described connector, be provided with arc groove on described connector between described connector and described center bit, have two reamer sheets at least along center bit is uniform between described connector and described center bit, the root of described reamer sheet is arranged in described arc groove, and the described connector end between described adjacent two reamer sheets arranges projection, and described protruding both sides are near described reamer sheet.When concentric simultaneous casing drilling tool is worked, center bit touches ground and is under pressure, the center bit moving reamer sheet of shipper pole that makes progress outwards extends, when center bit and connector clamp the reamer sheet, the reamer sheet is stuck in adjacent two and convexes to form in groove, when concentric simultaneous casing drilling tool rotates, when the reamer sheet is subject to tangential impact, because projection is blocked the reamer sheet on tangential, make the reamer sheet tangentially not swing, avoided because the reamer sheet swings and fracture due to tangential impact.
As preferred version of the present utility model, the side of described projection matches with corresponding described reamer sheet side.While reducing the drilling tool rotation, the reamer sheet, to protruding impact, has further prevented that the reamer sheet from being fractureed due to impact.
Described projection and described connector seamlessly transit.Resistance when projection and connector seamlessly transit and reduce drilling tool and creep into or exit.
Concentric simultaneous casing drilling tool of the present utility model is provided with the projection matched with the reamer sheet in the connector end, when concentric simultaneous casing drilling tool is worked, center bit touches ground and is under pressure, the center bit moving reamer sheet of shipper pole that makes progress outwards extends, when center bit and connector clamp the reamer sheet, the reamer sheet is stuck in adjacent two and convexes to form in groove, when concentric simultaneous casing drilling tool rotates, when the reamer sheet is subject to tangential impact, because projection is blocked the reamer sheet on tangential, make the reamer sheet tangentially not swing, avoided because the reamer sheet swings and fracture due to tangential impact.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, the reamer sheet does not tangentially swing, and has avoided because the reamer sheet swings and fracture due to tangential impact.
2, the side of projection matches with corresponding reamer sheet side, and while reducing the drilling tool rotation, the reamer sheet, to protruding impact, has further prevented that the reamer sheet from being fractureed due to impact.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
The structural representation that Fig. 2 is connector,
Mark in figure: 1-connector, 2-center bit, 3-reamer sheet, 4-projection, 5-groove.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Concentric simultaneous casing drilling tool as depicted in figs. 1 and 2, comprise: connector 1, slidably connect center bit 2 on described connector 1, be provided with arc groove on described connector 1 between described connector 1 and described center bit 2, have two reamer sheets 3 at least along center bit 2 is uniform between described connector 1 and described center bit 2, the root of described reamer sheet 3 is arranged in described arc groove, described connector 1 end between described adjacent two reamer sheets 3 arranges projection 4, and described protruding 4 both sides are near described reamer sheet 3.When concentric simultaneous casing drilling tool is worked, center bit 2 touches ground and is under pressure, the center bit 2 upwards moving reamer sheet 3 of shipper pole outwards extends, when center bit 2 clamps reamer sheet 3 with connector 1, reamer sheet 3 is stuck in adjacent two projections 4 and forms in groove, when concentric simultaneous casing drilling tool rotates, when reamer sheet 3 is subject to tangential impact, because projection 4 is blocked reamer sheet 3 on tangential, make reamer sheet 3 tangentially not swing, avoided because reamer sheet 3 swings and fracture due to tangential impact.
Described protruding 4 side matches with corresponding described reamer sheet 3 sides.While reducing the drilling tool rotation, the impact of 3 pairs of projections 4 of reamer sheet, further prevented that reamer sheet 3 from being fractureed due to impact.
Described protruding 4 seamlessly transit with described connector 1.Resistance when projection 4 and connector 1 seamlessly transit and reduce drilling tool and creep into or exit.
Concentric simultaneous casing drilling tool of the present utility model is provided with the projection 4 matched with reamer sheet 3 in connector 1 end, when concentric simultaneous casing drilling tool is worked, center bit 2 touches ground and is under pressure, centre drill, 2 upwards the moving reamer sheet 3 of shipper pole outwards extend, when center bit 2 clamps reamer sheet 3 with connector 1, reamer sheet 3 is stuck in adjacent two projections 4 and forms in groove, when concentric simultaneous casing drilling tool rotates, when reamer sheet 3 is subject to tangential impact, because projection 4 is blocked reamer sheet 3 on tangential, make reamer sheet 3 tangentially not swing, avoided because reamer sheet 3 swings and fracture due to tangential impact.
All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a concentric simultaneous casing drilling tool, comprise: connector (1), slidably connect center bit (2) on described connector (1), be provided with arc groove on described connector (1) between described connector (1) and described center bit (2), have two reamer sheets (3) at least along center bit (2) is uniform between described connector (1) and described center bit (2), the root of described reamer sheet (3) is arranged in described arc groove, it is characterized in that, described connector (1) end between described adjacent two reamer sheets (3) arranges projection (4), described projection (4) both sides are near described reamer sheet (3).
2. concentric simultaneous casing drilling tool according to claim 1, is characterized in that, the side of described projection (4) matches with corresponding described reamer sheet (3) side.
3. concentric simultaneous casing drilling tool according to claim 1 and 2, is characterized in that, described projection (4) seamlessly transits with described connector (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705532 CN202954741U (en) | 2012-12-19 | 2012-12-19 | Concentric casing drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220705532 CN202954741U (en) | 2012-12-19 | 2012-12-19 | Concentric casing drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954741U true CN202954741U (en) | 2013-05-29 |
Family
ID=48460318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220705532 Expired - Lifetime CN202954741U (en) | 2012-12-19 | 2012-12-19 | Concentric casing drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979461A (en) * | 2012-12-19 | 2013-03-20 | 广汉市井管厂 | Concentric simultaneous casing drilling tool |
-
2012
- 2012-12-19 CN CN 201220705532 patent/CN202954741U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979461A (en) * | 2012-12-19 | 2013-03-20 | 广汉市井管厂 | Concentric simultaneous casing drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Luo new road Guanghan City, Sichuan province 618300 Deyang City 150 meters Patentee after: Guanghan Copry Technology Co.,Ltd. Address before: Luo new road Guanghan City, Sichuan province 618300 Deyang City 150 meters Patentee before: GUANGHAN WELL TUBE FACTORY |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130529 |
|
| CX01 | Expiry of patent term |