CN201396071Y - High grinding resistant diamond bit - Google Patents
High grinding resistant diamond bit Download PDFInfo
- Publication number
- CN201396071Y CN201396071Y CN2009201493104U CN200920149310U CN201396071Y CN 201396071 Y CN201396071 Y CN 201396071Y CN 2009201493104 U CN2009201493104 U CN 2009201493104U CN 200920149310 U CN200920149310 U CN 200920149310U CN 201396071 Y CN201396071 Y CN 201396071Y
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- tooth
- cutting teeth
- bit
- diamond
- main cutting
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Abstract
The utility model relates to a high grinding resistant diamond bit. The drill bit body has a plurality of knife wings, a line of main cutting teeth are disposed on the front position of each knife wing, a line of auxiliary cutting teeth are disposed on the rear position of each knife wing; the main cutting teeth are high grinding resistant cutting teeth, the auxiliary cutting teeth are PDC teeth or same high grinding resistant cutting teeth with the main cutting teeth, and the exposing height of the auxiliary cutting teeth is lower than that of the main cutting teeth. When the bit is used fordrilling a relatively homogeneous abrasive stratum, the main cutting teeth on the front has excellent self-shaping property, and the PDC teeth on the rear breaks rocks by shearing, thereby, the mechanical drilling speed of the drill bit is improved effectively. When the bit is used for drilling a hard interlayer, the main cutting teeth on the front bears the drilling pressure and limits the feeding depth of the bit, can effectively reduce work torque and reduce shock loading, thereby protect the PDC teeth on the rear from being destroyed by shock, and avoid the cutting teeth from cracking.
Description
Technical field
The utility model belongs to oil and geological drilling is used the diamond bit field.Be a kind of high anti-grinding, impact-resistant diamond bit with secondary cutting structure.
Background technology
The main broken rock mode of PDC drill bit is to shear, and the shear strength height of hard formation and hard interbedded layer, the PDC cutting teeth is bearing very big torsional forces in drilling process, in addition, when bit drills during to hard formation, drill bit is easy to generate the whirling vibration of nature, it is just bigger that the bit cutting tooth bears high impact loads, under these two kinds of situations, can both cause PDC cutting teeth impact failure or cause the cracked and whole diamond layer of diamond layer to come off, thereby easily cause the PDC tooth to lose efficacy in advance, shorten drilling life of bit.
The terrestrial facies Xu Jiahe of the Northeast, river reaches and is rich in feldspar quartz sandstone, rock-fragment sandstone with overlying strata, and abrasiveness is strong; Mud stone contains calcareous agglomerate usually, has that abrasiveness is strong, cutting teeth wedging difficulty, cutting teeth be easily by characteristics such as impact failures; From present cutting teeth technology Xu Jiahe and with the not too suitable PDC drill bit that uses of overlying strata.
This is because the structure below existing diamond bit design is generally adopted: adopt the PDC composite sheet cutting teeth of deciding, high-abrasive materials such as back row's cutting teeth and carbide alloy are placed in the back.Because front-seat main cutting tooth bears the pressure of the drill and contacts the stratum at first.Suffered shock loading is bigger, and that the PDC cutting teeth very easily occurs is cracked, delamination and high temperature wear destroy, thereby causes the inefficacy in advance of drill bit.
Because of the geological conditions complexity, the formation hardness height, abrasiveness is strong, and drillability is poor, and bit life is short, uses the tricone bit rate of penetration low, and drilling period is long, situation complexity in down-hole in the drilling process.
Summary of the invention
In order to address the above problem, the utility model provides a kind of anti-diamond bit that grinds of the height that creeps into northeast, river Continental Facies Stratigraphy that is applicable to.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of high anti-grinding diamond bit, have several wings on its bit body, the front-seat position of each wing is provided with row's main cutting tooth, the back court position of each wing is provided with the secondary cutting teeth of a row, it is characterized in that: described main cutting tooth is a kind of high anti-grinding cutting tooth, described secondary cutting teeth is PDC tooth or the high anti-tooth lapping identical with the main cutting tooth, and the proud exposure of described secondary cutting teeth is lower than the main cutting tooth.
In preferable technical scheme: what described main cutting tooth adopted is natural diamond impregnated tooth.Natural diamond impregnated tooth is to be formed according to certain ratio sintering by natural diamond and bit body powder.Natural diamond impregnated tooth is by double sintering or be welded on the bit body wing.
In preferable technical scheme: what described secondary cutting teeth adopted is the impregnated tooth identical with the main cutting tooth, and is fixed on the wing by double sintering or welding manner.
In preferable technical scheme: described impregnated tooth is any one or the arbitrarily several combination that diamond cast tooth, the impregnated tooth of TSP and diamond and TSP mix impregnated tooth.
In preferable technical scheme: on bit body, also be provided with several spray-holes.
In preferable technical scheme: described secondary cutting teeth adopts the PDC tooth, is fixed on the wing by welding manner.
Structure of the present utility model has following advantage: front-seat main cutting tooth carrying the pressure of the drill, the restriction depth of tooth penetration reduces operation torque, prevents that back row's composite sheet load is excessive, causes phenomenons such as cracked.This drill bit has high anti-grinding, impact-resistant characteristic, thereby has prolonged the life-span of drill bit.
Description of drawings
Fig. 1 is the layout schematic diagram of an embodiment of the utility model.
Fig. 2 is the side arrangement schematic diagram of an embodiment of the utility model.
The specific embodiment
For structure of the present utility model and function can be illustrated with a preferred embodiment below in conjunction with accompanying drawing by clearer understanding and approval.
The anti-diamond bit that grinds of height provided by the utility model, as Fig. 1, shown in Figure 2, have several wings 2 on its bit body 1, the front-seat position of each wing 2 is provided with row's main cutting tooth 3, the back court position of each wing 2 is provided with the secondary cutting teeth 4 of a row, what the front-seat main cutting tooth 3 of present embodiment adopted is preburned diamond cast tooth, by double sintering or be welded on bit body 1 wing 2, what the secondary cutting teeth 4 of back row adopted is conventional PDC tooth, and be welded on the described wing 2, and the proud exposure of described secondary cutting teeth 4 is lower than main cutting tooth 3.Wherein said " front row " and " back row " are with respect to the creeping into for the cutting direction of wing 2, are very clearly to those skilled in the art.In addition, also be provided with several spray-holes 5 on bit body 1, be used for jet drilling liquid to cutting teeth, this part is an existing structure, will not give unnecessary details.
Use the utility model to bore when meeting the abrasive layer that compares homogeneous, front-seat main cutting tooth 3 has good self-sharpening, and back row PDC tooth can effectively improve the rate of penetration of drill bit with the cut mode fractured rock.When bore meeting hard interbedded layer, front-seat main cutting tooth 3 carrying the pressure of the drill, and restriction bit penetration can effectively reduce operation torque, reduce shock loading, thereby protection back row PDC cutting teeth is avoided impact failure, avoid phenomenons such as cutting teeth is cracked to take place.Natural diamond impregnated tooth combines with the effective of PDC tooth, can significantly improve the rate of penetration of drill bit, prolongs the application life of drill bit.
What in the above-described embodiments, described main cutting tooth 3 adopted is natural diamond impregnated tooth.Natural diamond impregnated tooth is to be formed according to certain ratio sintering by natural diamond and bit body 1 powder.Natural diamond impregnated tooth is by double sintering or be welded on bit body 1 wing 2.And when reality is used, also can use the high anti-grinding cutting tooth of other form to replace above-mentioned diamond cast tooth and use as main cutting tooth 3, for example: the impregnated tooth of TSP, or diamond and TSP mix impregnated tooth.Moreover, described impregnated tooth can also be any several combination that diamond cast tooth, the impregnated tooth of TSP and diamond and TSP mix impregnated tooth.
And described secondary cutting teeth 4 is except adopting the PDC tooth, can also adopt the high anti-tooth lapping identical with main cutting tooth 3, can reach the rate of penetration that improves drill bit equally, the purpose that prolongs the application life of drill bit.That is to say that the impregnated tooth that described secondary cutting teeth 4 is adopted can be any one or the arbitrarily several combination that diamond cast tooth, the impregnated tooth of TSP and diamond and TSP mix impregnated tooth.
More than explanation is just illustrative for the utility model, and it is nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited, can make many modifications, variation or equivalence, but but all will fall within the claim restricted portion of the present utility model.
Claims (7)
1, a kind of high anti-grinding diamond bit, have several wings on its bit body, the front-seat position of each wing is provided with row's main cutting tooth, the back court position of each wing is provided with the secondary cutting teeth of a row, it is characterized in that: described main cutting tooth is a kind of high anti-grinding cutting tooth, described secondary cutting teeth is PDC tooth or the high anti-tooth lapping identical with the main cutting tooth, and the proud exposure of described secondary cutting teeth is lower than the main cutting tooth.
2, the anti-diamond bit that grinds of height according to claim 1, it is characterized in that: what described main cutting tooth adopted is preburned impregnated tooth, by double sintering or be weldingly fixed on the wing.
3, the anti-diamond bit that grinds of height according to claim 2 is characterized in that: described impregnated tooth is any one or several combination arbitrarily that diamond cast tooth, the impregnated tooth of TSP and diamond and TSP mix impregnated tooth.
4, combined cut structure diamond bit according to claim 2 is characterized in that: what described secondary cutting teeth adopted is the impregnated tooth identical with the main cutting tooth, and is fixed on the wing by double sintering or welding manner.
5, the anti-diamond bit that grinds of height according to claim 4 is characterized in that: the impregnated tooth that described secondary cutting teeth adopted is any one or several combination arbitrarily that diamond cast tooth, the impregnated tooth of TSP and diamond and TSP mix impregnated tooth.
6, the anti-diamond bit that grinds of height according to claim 1 is characterized in that: also be provided with several spray-holes on bit body.
7, combined cut structure diamond bit according to claim 1 is characterized in that: described secondary cutting teeth adopts the PDC tooth, and is fixed on the wing by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201493104U CN201396071Y (en) | 2009-04-08 | 2009-04-08 | High grinding resistant diamond bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201493104U CN201396071Y (en) | 2009-04-08 | 2009-04-08 | High grinding resistant diamond bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201396071Y true CN201396071Y (en) | 2010-02-03 |
Family
ID=41618577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201493104U Expired - Fee Related CN201396071Y (en) | 2009-04-08 | 2009-04-08 | High grinding resistant diamond bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201396071Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189906A (en) * | 2013-03-14 | 2015-12-23 | 史密斯国际有限公司 | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| CN106182331A (en) * | 2016-07-08 | 2016-12-07 | 四川川庆石油钻采科技有限公司 | A kind of 3D print die manufacture method of diamond-impregnated bit |
| US10030452B2 (en) | 2013-03-14 | 2018-07-24 | Smith International, Inc. | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| US10287825B2 (en) | 2014-03-11 | 2019-05-14 | Smith International, Inc. | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements |
-
2009
- 2009-04-08 CN CN2009201493104U patent/CN201396071Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189906A (en) * | 2013-03-14 | 2015-12-23 | 史密斯国际有限公司 | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| US10030452B2 (en) | 2013-03-14 | 2018-07-24 | Smith International, Inc. | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| US10309156B2 (en) | 2013-03-14 | 2019-06-04 | Smith International, Inc. | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| US10287825B2 (en) | 2014-03-11 | 2019-05-14 | Smith International, Inc. | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements |
| US11215012B2 (en) | 2014-03-11 | 2022-01-04 | Schlumberger Technology Corporation | Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements |
| CN106182331A (en) * | 2016-07-08 | 2016-12-07 | 四川川庆石油钻采科技有限公司 | A kind of 3D print die manufacture method of diamond-impregnated bit |
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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: 20100203 Termination date: 20170408 |