CN203822166U - PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions - Google Patents
PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions Download PDFInfo
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- CN203822166U CN203822166U CN201420274393.0U CN201420274393U CN203822166U CN 203822166 U CN203822166 U CN 203822166U CN 201420274393 U CN201420274393 U CN 201420274393U CN 203822166 U CN203822166 U CN 203822166U
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Abstract
The utility model discloses a PDC (Polycrystalline Diamond Compact) bit with the vibration reduction and centering functions. The PDC bit comprises a bit body, wherein a plurality of blades are arranged on the bit body; a plurality of main cutting teeth are arranged on each blade; a plurality of R teeth are arranged on each blade, and are arranged between the main cutting teeth on every two adjacent blades; each R tooth and each main cutting tooth arranged close to the R tooth and positioned on one blade where the R tooth is positioned are arranged on the same circular motion track, the central line of each R tooth and the bit surface at an insertion hole in one blade corresponding to the R tooth form a caster angle ranging from 15 degrees to 25 degrees, and the top face of the R tooth faces the main cutting tooth; a centering awl is arranged at the center of the top end of the bit body; the central line of the centering awl is overlapped with that of the bit body; the centering awl is arranged at the center of the area formed by the blades. According to the bit, the axial, circumferential and transverse vibration of the bit can be lowered simultaneously, the stable drilling can be implemented, and the drilling efficiency is improved.
Description
Technical field
The utility model relates to oil drilling field, particularly, relates to the PDC compact bit with vibration damping and centering function.
Background technology
Polycrystalline diamond thin layer is adhered to the composite material being bonded in cemented carbide substrate and claim diamond compact, code name is PDC.Diamond compact has the high abrasion resistance of dimond synneusis and the high impact-resistant of carbide alloy concurrently, and diamond layer can remain sharp-cutting edge, thereby soft in oil and geological drilling use to medium ground, and effect is very good.In oil drilling engineering, the degree of depth of drilling well is generally at 2 km to 4 kms, because the rigidity of well depth, drilling rod length, drilling rod is very low, in the time that geologic lithology is inhomogeneous, the mechanical movement meeting of drilling tool causes very large axial vibration, rotational vibration and oscillation crosswise, this vibration is very large on drilling project impact: one, and the mechanical oscillation of drilling tool are easy to cause the destruction of the facility such as drill bit, drilling rod; Its two, due to mechanical oscillation, the centering of drill bit is poor, can cause wellhole expand, lose circle, be the later stage engineering increase difficulty; Its three, because mechanical oscillation meeting reduces rate of penetration, affect drilling depth, when serious, can cause drilling well unsuccessfully; Its four, due to the mechanical oscillation of drilling tool, wellhole expands, and increases energy consumption, therefore reducing drill string vibration is an important problem in drilling project.
The Chinese patent that the patent No. is " 201320519785.4 " discloses a kind of strong cone PDC vibration damping speed-raising drill bit, mainly comprise bit body, nozzle, PDC cutting teeth, strong cone, the operator wing and secondary wing, the operator wing is that 2-4 is individual uniform, secondary wing is that 3-4 is individual uniform, strong cone is an independent cutting teeth, be positioned at other position in the anodontia region in bit body center or center, PDC cutting teeth is single or double layout, this drill bit can produce at well center stress raisers by strong cone tooth is set, improve the efficiency of breaking rock of well central area, greatly improve the rate of penetration of drill bit, in addition bore by force PDC drill bit and can reduce drill vibration, especially can significantly reduce its oscillation crosswise, thereby can significantly extend bit life, downhole tool is also had to protective effect.In this technology, only to position by strong cone, this structure has certain minimizing drill vibration function, but its vibration being subject to of the drilling process of drill bit is very large, only to be provided with strong cone effect, its effectiveness in vibration suppression is not fine, especially axial vibration and rotational vibration, and strong cone does not almost play a role.
The Chinese patent that the patent No. is " 200920286357.5 " discloses a kind of New Type of PDC Bit, comprise wing on bit body of bit body, nozzle, some sintering, on wing, be welded with composite sheet, composite sheet is by three kinds of cutting teeths: PDC cutting teeth, rule footpath cutting teeth and gauge cutting teeth form, described PDC drill bit also comprises vibration damping joint, vibration damping joint is welded in above each wing, after described vibration damping joint is positioned at rule footpath cutting teeth.This drill bit can be resisted axial vibration and impact, protection drill bit PDC cutting teeth.But this drill bit does not almost play effect of contraction for oscillation crosswise and rotational vibration in to drilling process, drill bit wellhole in the time of probing can be expanded, increase energy consumption.
The Chinese patent that the patent No. is " 200320104368.X " discloses a kind of Multifunction diamond inserted tooth protection composite sheet drilling bit; comprise wing, hydrophthalmia, water channel; on wing, be provided with poly-diamond compact; on wing, be also provided with multi-functional impregnated tooth, this multi-functional impregnated tooth and drill bit are into a single integrated structure.This drill bit vibration damping is abundant, wear-resistant, long service life.This drill bit can not carry out vibration damping for the oscillation crosswise being subject to and rotational vibration in drilling process, while causing drilling, produces and rocks, and the size of wellhole can be expanded, and increases energy consumption.
Utility model content
The utility model overcomes existing drill bit and exists drill bit to produce the problem of one or more axial vibrations, rotational vibration or oscillation crosswise situation, design a kind of PDC compact bit with vibration damping and centering function, this drill bit can reduce simultaneously drill bit axially, rotational vibration and oscillation crosswise, realize and steadily creeping into, improve drilling efficiency.
The technical scheme in the invention for solving the above technical problem is: the PDC compact bit with vibration damping and centering function, comprise drill body, on described drill body, be provided with several wings, on each wing, be provided with some main cutting teeth, on described wing, be provided with some R teeth, R tooth is arranged between two main cutting teeth on adjacent wing, main cutting tooth near this R tooth on each R tooth wing same with it is arranged on same circular motion track, the bit face at the patchhole place on the center line of each the R tooth wing corresponding with it is the angle of 15 ° to 25 °, and the end face of this R tooth is towards this main cutting tooth, the center, top of described drill body is provided with centering cone, and the center line of centering cone and the center line of drill body overlap, and centering cone is arranged on the regional center place that wing forms.Conventionally main cutting tooth is the track installation consistent with wing radian on same wing, same, line between R tooth on same wing is also that the radian that is identical is installed, like this in the time that main cutting tooth cuts out groove in rock stratum, R tooth is just in time within groove and moves, and R tooth can add the cutting of deep trench on the one hand, and R tooth is subject to the constraint of groove on the other hand, can play supporting role, reduce the axial and oscillation crosswise of drill bit.Centering cone is in drilling process, taper composite sheet tooth top is lived rear wedging rock stratum, drill bit is played to good positioning action, reduce the oscillation crosswise of drill bit with this, by above architecture advances, realize perimeter constraint and center constraint, greatly reduced the multidirectional oscillation crosswise of drill bit in drilling process, realized steadily and having crept into.By the acting in conjunction of R tooth and centering cone, can reduce simultaneously drill bit axially, rotational vibration and oscillation crosswise, realize and steadily creeping into, improve drilling efficiency.
The top of R tooth is than the low 0.5mm to 1.5mm in top that is arranged on the main cutting tooth in same circular motion track.During due to cutting, main cutting tooth is the parts that cut as main and rock stratum, R tooth is as the cutting that can add deep trench, R tooth is subject to the constraint of groove on the other hand, can play supporting role, axial and the oscillation crosswise that has reduced drill bit, therefore the top of R tooth is lower than the top that is arranged on the main cutting tooth in same circular motion track, and general difference in height is controlled in 0.5mm to 1.5mm, neither damage R tooth, also can meet the needs that it adds deep-cutting simultaneously.
R tooth comprises and is the cutting table of circular cone structure and the joint pin of cylindrical structure, the axis of joint pin and the dead in line of cutting table, the face size of one end that in cutting table, diameter is larger is identical with the face size of joint pin, and the one end away from cutting table and the drill body of joint pin are fixed.Alleged R tooth of the present utility model, be actually the cutting teeth that the cutting table of circular cone structure and the joint pin of cylindrical structure connect and compose, on the frustum of a cone top of R tooth, sintering is coated with poly-diamond compact, be increased in the cutting to rock stratum in drilling process with this, the axis of R tooth and its mounting surface normal on drill body are the back rake angle of 15 ° to 25 °, in the time cutting with rock stratum, there is an arc milling sword, the better effects if of cutting like this.
Centering cone comprises and is the locating cone of conical structure and the reference column of cylindrical structure, the axis of locating cone and the dead in line of reference column, and the face size of reference column is identical with the bed-plate dimension of locating cone, reference column is fixed away from end face and the drill body of locating cone.Locating cone will contact with rock stratum, so be all coated with poly-diamond layer on the outer wall of locating cone, in the time locating with contacting of rock stratum, can bear the grinding of rock stratum, and reference column is as being located by connecting function, and its outer wall is not coated with poly-diamond layer.
On drill body, be provided with several nozzles, each nozzle correspondence is arranged between two adjacent wings.Nozzle is existing structure, and conventional nozzle the utility model can be general.
To sum up, the beneficial effects of the utility model are:
1, this drill bit can reduce simultaneously drill bit axially, rotational vibration and oscillation crosswise, realize and steadily creeping into;
2, drill bit mechanical oscillation obviously reduce, and energy consumption reduces, and has obviously improved drilling efficiency.
Brief description of the drawings
Fig. 1 is front view of the present utility model;
Fig. 2 is top view of the present utility model;
Fig. 3 is the structural representation of R tooth;
Fig. 4 is the structural representation of centering cone;
Fig. 5 is the scheme of installation of R tooth.
Mark and corresponding component title in accompanying drawing: 1-drill body; 2-nozzle; 3-wing; 4-R tooth; 5-centering cone; 6-main cutting tooth; 7-locating cone; 8-reference column; 9-cutting table; 10-joint pin; The center line of 11-R tooth; The surface normal of 12-patchhole.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As Fig. 1, shown in Fig. 2, there is the PDC compact bit of vibration damping and centering function, comprise drill body 1, on described drill body 1, be provided with several wings 3, on each wing 3, be provided with some main cutting teeth 6, on described wing 3, be provided with some R teeth 4, R tooth 4 is arranged between two main cutting teeth 6 on adjacent wing 3, main cutting tooth 6 near this R tooth 4 on each R tooth 4 wing 3 same with it is arranged on same circular motion track, the bit face at the patchhole place on the center line of each R tooth 4 wing 3 corresponding with it is the angle of 15 ° to 25 °, and the end face of this R tooth 4 is towards this main cutting tooth 6, the center, top of described drill body 1 is provided with centering cone 5, and the center line of the center line of centering cone 5 and drill body 1 overlaps, and centering cone 5 is arranged on the regional center place that wing 3 forms.The top of R tooth 4 is than the low 1mm in top that is arranged on the main cutting tooth 6 in same circular motion track.Height difference H is that 1mm is best height, and stock-removing efficiency is the highest like this, also can not damage the flank of tooth of R tooth 4.The position of conventionally R tooth 4 being installed on wing is called wing shoulder, if from the cutting rotation direction of drill bit, also can be understood as the rear portion that R tooth 4 is arranged on the main cutting tooth 6 in same wing 3, and this R tooth 4 is on the movement locus of the main cutting tooth 6 of close this R tooth 4 on same wing 3, carrying out in drilling process, main cutting tooth 6 first cuts rock stratum, then the end face that is R tooth 4 recedes, in the time that main cutting tooth 6 cuts out groove in rock stratum, R tooth 4 is just in time within groove and moves, R tooth 4 can add the cutting of deep trench on the one hand, R tooth 4 is subject to the constraint of groove on the other hand, can play supporting role, reduce the axial and oscillation crosswise of drill bit.Add centering cone 5 drill bit is played to good positioning action, reduce the oscillation crosswise of drill bit with this, by above architecture advances, perimeter constraint and center constraint are realized, greatly reduce the multidirectional vibration of drill bit in drilling process, realize reduce simultaneously drill bit axially, rotational vibration and oscillation crosswise, realize and steadily creeping into, improve drilling efficiency.
Embodiment 2:
As shown in Fig. 3, Fig. 5, on the basis of embodiment 1, R tooth 4 comprises and is the cutting table 9 of circular cone structure and the joint pin 10 of cylindrical structure, the dead in line of the axis of joint pin 10 and cutting table 9, the face size of one end that in cutting table 9, diameter is larger is identical with the face size of joint pin 10, and one end away from cutting table 9 of joint pin 10 and drill body 1 are fixing.And patchhole place bit face normal on the axis of joint pin 10 and wing is to 25 ° of oblique angles to be arranged; and the end face that ensures cutting table 9 recedes; it is the α angle that the middle center line 11 of R tooth shown in Fig. 5 and the surface normal 12 of patchhole form; like this in the time that drill bit cuts; can ensure the rational position that contacted of cutting table 9 and rock stratum; both protect the flank of tooth, also increased stock-removing efficiency.
Embodiment 3:
As shown in Figure 4, on the basis of embodiment 1, centering cone 5 comprises and is the locating cone 7 of conical structure and the reference column 8 of cylindrical structure, the dead in line of the axis of locating cone 7 and reference column 8, and the face size of reference column 8 is identical with the bed-plate dimension of locating cone 7.Locating cone 7 and reference column 8 adopt and are connected to overall structure, reference column 8 is to fix with the center, top of drill body 1, in the time contacting with rock stratum, can keep the centering function of drill bit 1, in drilling process, centering cone 5 withstands rear wedging rock stratum, and drill bit is played to good positioning action, has reduced the oscillation crosswise of drill bit with this, by above architecture advances, realize perimeter constraint and center constraint, greatly reduced the multidirectional oscillation crosswise of drill bit in drilling process, realized steadily and having crept into.Be used in conjunction with R tooth 4, reduce the vibration of drill bit in multiple directions, effect is more obvious.
Embodiment 4:
As shown in Figure 1 and Figure 2, on the basis of above-described embodiment, be provided with several nozzles 2 on drill body 1, each nozzle 2 correspondence is arranged between two adjacent wings 3.Nozzle 2 is existing structures, refer to drilling fluid that passage from drilling rod inner chamber drill bit, for delivery of drilling fluid, be used in conjunction with the slurry channel on drill body, slurry channel is convenient to drain abrasive dust and is rinsed main cutting tooth 6 and centering cone 5, makes it can fast cooling.
The design of this drill bit, through test drilling and drilling well platform experiment, drill bit mechanical oscillation obviously reduce, and energy consumption reduces, and has obviously improved drilling efficiency.
As mentioned above, can realize preferably the utility model.
Claims (5)
1. there is the PDC compact bit of vibration damping and centering function, comprise drill body (1), on described drill body (1), be provided with several wings (3), on each wing (3), be provided with some main cutting teeth (6), it is characterized in that, on described wing (3), be provided with some R teeth (4), R tooth (4) is arranged between the main cutting tooth (6) on two adjacent wings (3), the upper main cutting tooth (6) near this R tooth (4) of each R tooth (4) wing same with it (3) is arranged on same circular motion track, the bit face at the patchhole place on the center line of each R tooth (4) wing (3) corresponding with it is the angle of 15 ° to 25 °, and the end face of this R tooth (4) is towards this main cutting tooth (6), the center, top of described drill body (1) is provided with centering cone (5), and the center line of the center line of centering cone (5) and drill body (1) overlaps, and centering cone (5) is arranged on the regional center place that wing (3) forms.
2. the PDC compact bit with vibration damping and centering function according to claim 1, is characterized in that, the top of described R tooth (4) is than the low 0.5mm to 1.5mm in top that is arranged on the main cutting tooth (6) in same circular motion track.
3. the PDC compact bit with vibration damping and centering function according to claim 1, it is characterized in that, described R tooth (4) comprises and is the cutting table (9) of circular cone structure and the joint pin (10) of cylindrical structure, the dead in line of the axis of joint pin (10) and cutting table (9), the face size of one end that in cutting table (9), diameter is larger is identical with the face size of joint pin (10), and one end away from cutting table (9) of joint pin (10) and drill body (1) are fixing.
4. the PDC compact bit with vibration damping and centering function according to claim 1, it is characterized in that, described centering cone (5) comprises and is the locating cone (7) of conical structure and the reference column (8) of cylindrical structure, the dead in line of the axis of locating cone (7) and reference column (8), and the face size of reference column (8) is identical with the bed-plate dimension of locating cone (7), reference column (8) is fixing away from end face and the drill body (1) of locating cone (7).
5. according to the PDC compact bit with vibration damping and centering function described in any one in claim 1 to 4, it is characterized in that, on described drill body (1), be provided with several nozzles (2), each nozzle (2) correspondence is arranged between two adjacent wings (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274393.0U CN203822166U (en) | 2014-05-27 | 2014-05-27 | PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274393.0U CN203822166U (en) | 2014-05-27 | 2014-05-27 | PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions |
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| CN203822166U true CN203822166U (en) | 2014-09-10 |
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| CN201420274393.0U Active CN203822166U (en) | 2014-05-27 | 2014-05-27 | PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370212A (en) * | 2015-12-08 | 2016-03-02 | 大庆天瑞机械制造有限公司 | Anti-vortex polycrystalline diamond compact bit |
| CN107100574A (en) * | 2017-05-10 | 2017-08-29 | 中国海洋石油总公司 | A kind of integral type sidetracking window opening tool assembly |
| CN108952582A (en) * | 2018-08-28 | 2018-12-07 | 新疆贝肯能源工程股份有限公司 | PDC drill bit suitable for double pendulum speed-raising drilling tool |
| CN109759623A (en) * | 2019-03-01 | 2019-05-17 | 中信戴卡股份有限公司 | Rear steering section center hole machined gang tool and its processing method |
-
2014
- 2014-05-27 CN CN201420274393.0U patent/CN203822166U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370212A (en) * | 2015-12-08 | 2016-03-02 | 大庆天瑞机械制造有限公司 | Anti-vortex polycrystalline diamond compact bit |
| CN107100574A (en) * | 2017-05-10 | 2017-08-29 | 中国海洋石油总公司 | A kind of integral type sidetracking window opening tool assembly |
| CN108952582A (en) * | 2018-08-28 | 2018-12-07 | 新疆贝肯能源工程股份有限公司 | PDC drill bit suitable for double pendulum speed-raising drilling tool |
| CN109759623A (en) * | 2019-03-01 | 2019-05-17 | 中信戴卡股份有限公司 | Rear steering section center hole machined gang tool and its processing method |
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