CN204200091U - Be applicable to the PDC drill bit containing gravel stratum - Google Patents
Be applicable to the PDC drill bit containing gravel stratum Download PDFInfo
- Publication number
- CN204200091U CN204200091U CN201420559107.5U CN201420559107U CN204200091U CN 204200091 U CN204200091 U CN 204200091U CN 201420559107 U CN201420559107 U CN 201420559107U CN 204200091 U CN204200091 U CN 204200091U
- Authority
- CN
- China
- Prior art keywords
- composite sheet
- pdc
- drill bit
- pdc composite
- gravel stratum
- 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
Links
Abstract
The utility model discloses a kind of PDC drill bit be applicable to containing gravel stratum, mainly comprise bit body, PDC composite sheet, hard alloy sleeve, interior edge PDC composite sheet and the holder of impregnated with diamond tooth, this drill bit is containing when creeping in gravel stratum, first be PDC composite sheet rock cutting, interior edge PDC composite sheet does not participate in rock cutting, after PDC composite sheet collapses damage, under the wearing and tearing of rock, the exposure gradually of interior edge PDC composite sheet, participates in rock cutting; Impregnated with diamond tooth holder grinding rock, protects drill bit PDC composite sheet not to be subject to large impact simultaneously, reaches PDC drill bit containing the object in gravel stratum with longer application life by these methods.
Description
Technical field
The utility model relates to the improvement of a kind of petroleum gas in drill bit field, drilling bit used for geological prospecting.
Background technology
At present, PDC drill bit is widely used in oil, natural gas, geological drilling, achieves outstanding result of use, and the present and the future will have and applies more widely.But in some stratum, there is gravel or glutenite, when creeping in these stratum, PDC Cutter collapses and damages seriously, thus causing drill bit to be scrapped in advance, footage per bit is few, and rate of penetration is slow, and drill bit use amount increases, frequently make a trip, drilling period extends, and drilling cost increases.
Utility model content
The purpose of this utility model is to solve prior art Problems existing, provides a kind of PDC drill bit that can be applicable to containing gravel stratum.
For solving the problems of the technologies described above, the utility model is applicable to the PDC drill bit containing gravel stratum, comprise bit body, PDC composite sheet and nozzle, on this basis: set up hard alloy sleeve at the rear portion of the PDC composite sheet of bit shoulder, inlay PDC composite sheet or Diamond Compact body at the endoporus of hard alloy sleeve, be provided with the holder of impregnated with diamond tooth at the rear portion of drill bit heart portion PDC composite sheet.
The shape of hard alloy sleeve comprises circle or ellipse, and inner hole comprises through hole or blind hole.
Drill bit of the present utility model is containing when creeping in gravel stratum, and be first PDC composite sheet rock cutting, interior edge PDC composite sheet does not participate in rock cutting in the inside of hard alloy sleeve, and the protection being subject to alloy sheath can not damage in advance.After PDC composite sheet collapses damage, under the wearing and tearing of rock, first alloy sheath weares and teares, and then, the exposure gradually of edge PDC composite sheet, participates in rock cutting, and now most interior edge PDC composite sheet is still subject to the protection of alloy sheath.Heart portion cutting teeth is because the impact be subject to is less; the probability that composite sheet is damaged is also relatively little; so edge PDC composite sheet in replacing with the holder of impregnated with diamond tooth; when PDC composite sheet may wear to a certain degree; the holder of impregnated with diamond tooth participates in grinding rock; protect drill bit PDC composite sheet not to be subject to large impact simultaneously, reach PDC drill bit by these methods and containing the object in gravel stratum with longer application life.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is suitable for the PDC drill bit complete layout containing gravel stratum;
Fig. 2 is that PDC composite sheet welds schematic diagram with the holder of impregnated with diamond tooth;
Fig. 3 is that PDC composite sheet welds schematic diagram with hard alloy sleeve and interior edge PDC composite sheet.
Accompanying drawing illustrates:
1. edge PDC composite sheet in bit body 2. PDC composite sheet 3. hard alloy sleeve 4.
5. impregnated with diamond tooth holder 6. nozzle.
Detailed description of the invention
Now in conjunction with Figure of description, the utility model will be further described:
Of the present utility modelly to be produced as follows: first interior edge PDC composite sheet is welded in hard alloy sleeve, is then integrally welded in the perforation of bit body, in same perforation, welds PDC composite sheet again; The holder of impregnated with diamond tooth is first brazed in perforation by same operation, and then by the soldering of PDC composite sheet in same perforation.
In use, first the utility model and other drilling tool are coupled together, at the bottom of lower going-into-well, then the pressurization of turn on pump circulating fluid is crept into.Drill bit is containing when creeping in gravel stratum, first be PDC composite sheet rock cutting, interior edge PDC composite sheet does not participate in rock cutting in the inside of hard alloy sleeve, and the protection being subject to alloy sheath can not damage in advance, after PDC composite sheet collapses damage, under the grinding of rock, first alloy sheath weares and teares, then in, the exposure gradually of edge PDC composite sheet, participates in rock cutting, and now most interior edge PDC composite sheet is still subject to the protection of alloy sheath; PDC composite sheet in heart portion is because the impact be subject to is less; the probability that composite sheet is damaged is also relatively little; so edge PDC composite sheet in replacing with the holder of impregnated with diamond tooth; when PDC composite sheet may wear to a certain degree; the holder of impregnated with diamond tooth participates in grinding rock; protect drill bit PDC composite sheet not to be subject to large impact simultaneously, reach PDC drill bit by these methods and containing the object in gravel stratum with longer application life.
Claims (2)
1. be applicable to the PDC drill bit containing gravel stratum, form primarily of bit body (1), PDC composite sheet (2) and nozzle (6), it is characterized in that: set up hard alloy sleeve (3) at the rear portion of the PDC composite sheet (2) of bit shoulder, inlay PDC composite sheet or Diamond Compact body (4) at the endoporus of hard alloy sleeve (3), be provided with impregnated with diamond tooth holder (5) at the rear portion of drill bit heart portion PDC composite sheet.
2. the PDC drill bit be applicable to containing gravel stratum according to claim 1, is characterized in that: the shape of hard alloy sleeve (3) comprises circle or ellipse, and inner hole comprises through hole or blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559107.5U CN204200091U (en) | 2014-09-27 | 2014-09-27 | Be applicable to the PDC drill bit containing gravel stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559107.5U CN204200091U (en) | 2014-09-27 | 2014-09-27 | Be applicable to the PDC drill bit containing gravel stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204200091U true CN204200091U (en) | 2015-03-11 |
Family
ID=52658060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420559107.5U Expired - Fee Related CN204200091U (en) | 2014-09-27 | 2014-09-27 | Be applicable to the PDC drill bit containing gravel stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204200091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507820A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | PDC (polycrystalline diamond compact) bit applicable to gravel-containing formation |
-
2014
- 2014-09-27 CN CN201420559107.5U patent/CN204200091U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507820A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | PDC (polycrystalline diamond compact) bit applicable to gravel-containing formation |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20210927 |