CN203022630U - Backward eccentric bit - Google Patents
Backward eccentric bit Download PDFInfo
- Publication number
- CN203022630U CN203022630U CN 201320044951 CN201320044951U CN203022630U CN 203022630 U CN203022630 U CN 203022630U CN 201320044951 CN201320044951 CN 201320044951 CN 201320044951 U CN201320044951 U CN 201320044951U CN 203022630 U CN203022630 U CN 203022630U
- Authority
- CN
- China
- Prior art keywords
- wing
- bit
- drill body
- reaming
- reamer
- 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 - Fee Related
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- Earth Drilling (AREA)
Abstract
The utility model discloses a backward eccentric bit, belonging to drilling equipment and solving the problem that a drilling accident is easily resulted from structural limit of the existing eccentric bit when the existing eccentric bit is used for borehole reaming. The backward eccentric bit comprises a bit body, a pilot bit and a joint, wherein the bit body is internally provided with a feed liquid channel; the pilot bit is arranged at the lower end of the bit body; the joint is arranged at the upper end of the bit body; the side surface of the bit body is provided with a reaming blade protruding the bit body; and the reaming blade is communicated with the feed liquid channel through a channel branch. The backward eccentric bit is simple in structure; through redesign of the eccentric bit, the reaming blade having cutting teeth at the upper part and the lower part of the reaming blade is arranged on the side surface of the bit body, so that the backward eccentric bit, when in use, can be used for reaming and drilling a new borehole and can be used for reaming an old borehole, and can achieve excellent reaming effect, thereby avoiding an underground accident.
Description
Technical field
The utility model relates to a kind of probing drill bit, specifically, relates to a kind of back water formula off-balance bit.
Background technology
At present, the off-balance bit of probing use is due to the restriction of structure, when reality is used, during in particular for reaming hole, can only creep into by reaming hole in new well, can not be in old well reaming hole, through practice examining, off-balance bit can not carry out reaming hole effectively to old well, and the reaming hole work of old well is failed substantially.And in the situation that former well is obstructed, use off-balance bit to be easy to get out new well, so just cause drilling failure, bring the tremendous economic loss.
The utility model content
The purpose of this utility model is to provide a kind of back water formula off-balance bit, solves the restriction structurally of present off-balance bit, is easy to cause the problem of drilling failure when causing it to be used for the well reaming hole.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Back water formula off-balance bit, comprise that inside is provided with the drill body of feed flow runner, and the pilot bit and the joint that is arranged on the drill body upper end that are arranged on the drill body lower end, described drill body side is provided with the reamer wing that protrudes from drill body and have fluid hole, and the fluid hole of this reamer wing is communicated with the feed flow runner by the runner branch road.
Specifically, described reamer wing comprises positive reamer wing, the reaming hole gauge wing and the reamer wing that falls that axially sets gradually along drill body from bottom to top.
Wherein, the described reaming hole gauge wing outside to the vertical distance of drill body axial line greater than the outside diameter of drill body 10mm at least, and positive reamer wing and fall reamer wing all from the oblique layout of direction in the drill body outside, reaming hole gauge wing lateral.
In order to realize better the utility model, described positive reamer wing, the reaming hole gauge wing, the reamer wing that falls all are fixedly connected with drill body.
And, described positive reamer wing, the reaming hole gauge wing and fall and be equipped with the cutting teeth of being made by diamond on reamer wing.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is simple in structure, by off-balance bit being carried out design again, it is set in the side of drill body the reamer wing of cutting teeth is all arranged up and down, make the utility model can either be used in use new well reaming hole and creep into, also can carry out reaming hole in old well, and can reach good reaming hole effect, avoid causing down-hole accident, have substantive distinguishing features and progress, and the utility model use is very convenient, is fit to apply.
(2) the utility model is by the positive reamer wing that oblique layout is set and the reamer wing that falls, be respectively used to creep into reaming hole and back water reaming hole, two kinds of reaming hole modes are gathered, use a kind of drill bit can realize two kinds of reaming hole modes, avoid repeatedly the more trouble of bit change, and effectively guaranteed maximum reaming hole diameter by the reaming hole gauge wing is set.
Description of drawings
Fig. 1 is structural representation of the present utility model.
In above-mentioned accompanying drawing, the component names that Reference numeral is corresponding is as follows:
1-drill body, 2-feed flow runner, 3-joint, 4-pilot bit, 5-runner branch road, the positive reamer wing of 6-, the 7-reaming hole gauge wing, 8-fall reamer wing.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, this back water formula off-balance bit, comprise that inside is provided with the drill body 1 of feed flow runner 2, and the pilot bit 4 and the joint 3 that is arranged on the drill body upper end that are arranged on the drill body lower end, described drill body side is provided with the reamer wing that protrudes from drill body, and this reamer wing is communicated with the feed flow runner by runner branch road 5.Specifically, described reamer wing comprises positive reamer wing 6, the reaming hole gauge wing 7 and the reamer wing 8 that falls that axially sets gradually along drill body from bottom to top.Wherein, the described reaming hole gauge wing outside to the vertical distance of drill body axial line greater than the outside diameter of drill body 10mm at least, concrete distance arranges according to actual needs, and positive reamer wing and fall reamer wing all from the oblique layout in the drill body outside, reaming hole gauge wing lateral.
In order to realize better the utility model, described positive reamer wing, the reaming hole gauge wing, the reamer wing that falls all are fixedly connected with drill body, can adopt to be welded and fixed, and also can adopt integrally sintered.And, described positive reamer wing, the reaming hole gauge wing and fall and be equipped with the cutting teeth of being made by diamond on reamer wing.
Because reamer wing of the present utility model has positive reamer wing and falls reamer wing, that is to say that can either be used for new well reaming hole creep into, again can be in old well reaming hole.when concrete the use, because the mode that new well reaming hole creeps into is similar to other drill bits of use, repeat no more in the present embodiment, and for old well reaming hole, to adopt back water formula reaming hole mode, support with pilot bit, by the rotation of falling reamer wing reaming hole, specifically: use the utility model to carry out old well reaming hole, first the utility model is transferred to the shaft bottom, then rotation on one side, carry drilling tool on one side, the utility model back water is got out, mainly by falling reamer wing, the borehole wall to be expanded, control simultaneously rate of penetration and the moment of torsion of drilling tool, make instantaneous rate of penetration per hour be no more than 25 meters, moment of torsion is no more than 150,000 Ns of rice, reduced thus the moment of torsion that the drill bit reaming hole produces on the basis that guarantees the probing ability, avoided the down-hole accident that causes because moment of torsion is excessive.After completing a post back reaming, then transfer drilling tool, back water is one time again, to guarantee reaming hole rate, the complete reaming hole well of back water section so always.Use in this manner the utility model, can reach good reaming hole effect.Through the reality test, for the underproof well of original cementing quality, after creeping into by the utility model back water, cementing quality is all good.
According to above-described embodiment, just can realize well the utility model.
Claims (5)
1. back water formula off-balance bit, comprise that inside is provided with the drill body of feed flow runner (2) (1), and be arranged on the pilot bit (4) of drill body (1) lower end and be arranged on the joint (3) of drill body (1) upper end, it is characterized in that, described drill body (1) side is provided with the reamer wing that protrudes from drill body (1) and have fluid hole, and the fluid hole of this reamer wing is communicated with feed flow runner (2) by runner branch road (5).
2. back water formula off-balance bit according to claim 1, is characterized in that, described reamer wing comprises positive reamer wing (6), the reaming hole gauge wing (7) and the reamer wing (8) that falls that axially sets gradually along drill body (1) from bottom to top.
3. back water formula off-balance bit according to claim 2, it is characterized in that, the described reaming hole gauge wing (7) outside to the vertical distance of drill body axial line greater than the outside diameter of drill body (1) 10mm at least, and positive reamer wing (6) and all oblique layouts of direction outside the reaming hole gauge wing (7) the lateral drill body (1) of reamer wing (8) of falling.
4. back water formula off-balance bit according to claim 3, is characterized in that, described positive reamer wing, the reaming hole gauge wing, the reamer wing that falls all are fixedly connected with drill body.
5. back water formula off-balance bit according to claim 4, is characterized in that, described positive reamer wing, the reaming hole gauge wing and fall and be equipped with the cutting teeth of being made by diamond on reamer wing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320044951 CN203022630U (en) | 2013-01-28 | 2013-01-28 | Backward eccentric bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320044951 CN203022630U (en) | 2013-01-28 | 2013-01-28 | Backward eccentric bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022630U true CN203022630U (en) | 2013-06-26 |
Family
ID=48646621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320044951 Expired - Fee Related CN203022630U (en) | 2013-01-28 | 2013-01-28 | Backward eccentric bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203022630U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747087A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Self-cleaning reamer blade for large-diameter reaming |
| CN105422006A (en) * | 2015-12-08 | 2016-03-23 | 西南石油大学 | Adjustable underground rock breaking tool combining drilling and expanding |
| CN108533180A (en) * | 2018-04-24 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of drilling engineering is with boring hole-drawing device and reaming method |
-
2013
- 2013-01-28 CN CN 201320044951 patent/CN203022630U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747087A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Self-cleaning reamer blade for large-diameter reaming |
| CN105422006A (en) * | 2015-12-08 | 2016-03-23 | 西南石油大学 | Adjustable underground rock breaking tool combining drilling and expanding |
| CN108533180A (en) * | 2018-04-24 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of drilling engineering is with boring hole-drawing device and reaming method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20190128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |