CN202380978U - Stratum coring drilling bit and stratum coring drilling tool - Google Patents
Stratum coring drilling bit and stratum coring drilling tool Download PDFInfo
- Publication number
- CN202380978U CN202380978U CN2011205395610U CN201120539561U CN202380978U CN 202380978 U CN202380978 U CN 202380978U CN 2011205395610 U CN2011205395610 U CN 2011205395610U CN 201120539561 U CN201120539561 U CN 201120539561U CN 202380978 U CN202380978 U CN 202380978U
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- drill bit
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Abstract
The utility model discloses a stratum coring drilling bit and a stratum coring drilling tool, which overcome the defect that existing stratum coring drilling tool easily leads to accidents as bit bouncing and jamming of drilling tool. The cross section of the outer outline of the stratum coring drilling bit is non-circular; and the stratum coring drilling tool includes a drilling rod and the stratum coring drilling bit connected with the drilling rod. By adopting the drilling bit with the non-circular as elliptical cross section of the outer outline, the possibility of bit bouncing or jamming of drilling tool during sampling is reduced.
Description
Technical field
The utility model relates to the seismic exploration testing equipment, relates in particular to a kind of stratum coring bit and comprises a kind of stratum core bit of this drill bit.
Background technology
Oil exploration need be obtained the stratum core sample, and mechanical type rotation side-wall coring appearance is exactly a kind of instrument that on the borehole wall, laterally drills through the rock core sample, and the rotary drilling-head that it was equipped with is a very important instrument.
Rotary drilling-head is a hollow-core construction, and its inside and outside circle closely contacts with drilled object such as stratum or rock core or the like, produces bigger friction.Move in case drilling cuttings is many or instrument is micro-, all will occur sticking card phenomenon and cause accidents generations such as bit bouncing, bit freezing.
The utility model content
The utility model technical problem to be solved is to overcome the deficiency that present stratum coring bit causes accidents such as bit bouncing, bit freezing to take place easily.
In order to solve the problems of the technologies described above, the utility model provides a kind of stratum coring bit, and the outline of this drill bit shows as non-circular on cross section.
Preferably, non-circular ellipse, triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon or the fillet polygon of comprising that on cross section, show of the outline of this drill bit.
Preferably, the endoporus of this drill bit shows as circle on cross section.
Preferably, the endoporus of this drill bit shows as non-circular on cross section.
Preferably, non-circular ellipse, triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon or the fillet polygon of comprising that on cross section, show of the endoporus of this drill bit.
Preferably, the axis coinciding of the axle center of this drill bit and the drilling rod that is connected this drill bit.
The utility model also provides a kind of stratum core bit, the foregoing stratum coring bit that comprises drilling rod and be connected with this drilling rod.
Compared with prior art, it is non-circular such as oval-shaped drill bit that the embodiment of the utility model provides a kind of outline on cross section, to show as, bit bouncing or bit freezing phenomenon odds in the time of can reducing sampling.It is non-circular such as oval-shaped drill bit that the embodiment of the utility model provides a kind of outline and endoporus on cross section, all to show as, the generation of bit bouncing or bit freezing phenomenon in the time of can effectively preventing to take a sample.The drilling tool that comprises above-mentioned drill bit that the embodiment of the utility model provides can take out whole drilling tool easily when taking a sample.
Description of drawings
Fig. 1 is the cross-sectional schematic of stratum coring bit when sampling of the utility model embodiment.
Fig. 2 is the cross-sectional schematic of stratum coring bit when sampling of another embodiment of the utility model.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, hereinafter will combine accompanying drawing that the embodiment of the utility model is elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Analysis through the inventor; The main cause that the coring bit that uses at present is easy to generate bit freezing, bit bouncing etc. is; The gap is too little between the sampling aperture of interior external diameter of drill bit and rock; Landwaste (rock particles) under the head of drill bit bores adds the chip removal difficulty through the chip area on the drill bit thereby be difficult to get into swimmingly cause in the vertical well.If in drilling process, coring apparatus has a small amount of slippage up and down again, and bit freezing then takes place more easily.
As shown in Figure 1, the stratum coring bit of the utility model embodiment, outline shows as ellipse to its endoporus on cross section showing as circle on the cross section.When being installed to the drill bit of the utility model embodiment on the adaptive drilling rod, the center of circle of the endoporus of drill bit 1 is dropped on the axle center of drilling rod (not shown), and the axle center of drilling rod is the axis of rotation of drill bit 1.Because the outline of drill bit shows as ellipse on cross section; Therefore drill bit 1 is followed drilling rod when rotating at a high speed; Can in stratum 3, getting out the circular hole that a diameter equals this ellipse major axis, and drill bit internal can take off with diameter of bore and equates or slightly little rock core 2 (formation samples that drill bit 1 is got).
When drill bit 1 is taken a sample to stratum 3 under the induced effect of drilling rod; Because the outline of drill bit 1 shows as ellipse on cross section; Thereby it is flat to make that drill bit 1 is seen as from the outside; Therefore can in stratum 3, produce the circular hole that diameter equates with this transverse when rotated, thus meeting leaving gap between the drill bit of oval external surface 1 and this circular hole, and the maximum in this gap is the minor axis place of drill bit 1 oval external surface.Leave the gap between the stratum 3 just because of drill bit and outside, bit bouncing or bit freezing phenomenon odds in the time of therefore can effectively reducing sampling.
In fact; Drill bit among the utility model embodiment; Its outline on the cross section except can showing as above-mentioned ellipse, also can show as a kind of in various non-circular of triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon, fillet polygon or the like.The cross section of outline is a non-circular drill bit when under the drive of drilling rod, rotating at a high speed, and the hole and the drill bit internal that just can on the stratum, get out a circle can obtain rock core.The hole of the circle that wherein in the stratum, gets out, its radius equal each point on the drill bit outline to the ultimate range of axis of rotation.
As shown in Figure 2; The another kind of drill bit of the utility model embodiment; The cross section of its outline shows as oval perhaps other a kind of non-circular while, and the cross section of its endoporus also is a kind of non-circular of ellipse, triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon, fillet polygon or the like.Please when drill bit 1 gets out circular hole in stratum 3, can form cylindrical rock core 2 in the endoporus of drill bit 1 simultaneously with reference to embodiment illustrated in fig. 1.
When being oval, the diameter of cylindrical rock core equals the size of the oval minor axis of endoporus at the cross section of the endoporus of drill bit.In other embodiment of the utility model, if the cross section of drill bit endoporus is the non-circular of other kinds, the radius of the columniform rock core of then being obtained equals on the endoporus of drill bit each point to the minimum range of axis of rotation.
Embodiment as shown in Figure 2 has also stayed the gap between itself and the inner rock core 2 between drill bit 1 and stratum 3 in the leaving gap, drill bit 1 inner with rock core 2 between the gap maximum, be drill bit 1 endoporus ellipse major axis place.Chip area 11 in distributing on drill bit 1 inner surface, outer chip area 12 is distributing on the external surface.Embodiment as shown in Figure 2; Make drill bit can not be bundled together with drilled object; Reduce the friction between drill bit and the drilled object, compared the further generation of bit bouncing or bit freezing phenomenon when having reduced the drill bit sampling embodiment illustrated in fig. 1, solved the problem of prior art easy bit freezing.
The stratum core bit of the utility model embodiment mainly comprises a kind of in drilling rod and the foregoing various drill bit.This drilling rod is with after drill bit is connected, the axle center of drilling rod and the axis coinciding of drill bit, and the axis of rotation of the axle center of the two when being the drill bit rotation.
The embodiment of the utility model spin friction resistance when using reduces, because the chip area chip removal that is provided with on chip area that is provided with on the drill bit external surface and the inner surface is smooth and easy, and after the instrument trace moves, still can creep into anti-sticking effect highly significant safely.
Though the embodiment that the utility model disclosed as above, the embodiment that described content just adopts for the ease of understanding the utility model is not in order to limit the utility model.Technician under any the utility model in the technical field; Under the prerequisite of spirit that does not break away from the utility model and disclosed and scope; Can do any modification and variation what implement in form and on the details; But the scope of patent protection of the utility model still must be as the criterion with the scope that appending claims was defined.
Claims (7)
1. a stratum coring bit is characterized in that, the outline of this drill bit shows as non-circular on cross section.
2. stratum according to claim 1 coring bit is characterized in that,
Non-circular ellipse, triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon or the fillet polygon of comprising that the outline of this drill bit shows on cross section.
3. stratum according to claim 1 coring bit is characterized in that,
The endoporus of this drill bit shows as circle on cross section.
4. stratum according to claim 1 coring bit is characterized in that,
The endoporus of this drill bit shows as non-circular on cross section.
5. stratum according to claim 4 coring bit is characterized in that,
Non-circular ellipse, triangle, fillet triangle, right angle rectangle, round rectangle, right angle polygon or the fillet polygon of comprising that the endoporus of this drill bit shows on cross section.
6. according to claim 1,3 or 4 described stratum coring bits, it is characterized in that,
The axis coinciding of the axle center of this drill bit and the drilling rod that is connected this drill bit.
7. a stratum core bit is characterized in that, comprise drilling rod and be connected with this drilling rod like the described stratum of each claim coring bit in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205395610U CN202380978U (en) | 2011-12-21 | 2011-12-21 | Stratum coring drilling bit and stratum coring drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205395610U CN202380978U (en) | 2011-12-21 | 2011-12-21 | Stratum coring drilling bit and stratum coring drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202380978U true CN202380978U (en) | 2012-08-15 |
Family
ID=46629491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205395610U Expired - Lifetime CN202380978U (en) | 2011-12-21 | 2011-12-21 | Stratum coring drilling bit and stratum coring drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202380978U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265177A (en) * | 2014-08-25 | 2015-01-07 | 江苏长城石油装备制造有限公司 | Clamping prevention drilling tool |
-
2011
- 2011-12-21 CN CN2011205395610U patent/CN202380978U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265177A (en) * | 2014-08-25 | 2015-01-07 | 江苏长城石油装备制造有限公司 | Clamping prevention 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: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |