CN2625558Y - Multiple roller bit with low resistance gage structure - Google Patents
Multiple roller bit with low resistance gage structure Download PDFInfo
- Publication number
- CN2625558Y CN2625558Y CN 03254131 CN03254131U CN2625558Y CN 2625558 Y CN2625558 Y CN 2625558Y CN 03254131 CN03254131 CN 03254131 CN 03254131 U CN03254131 U CN 03254131U CN 2625558 Y CN2625558 Y CN 2625558Y
- Authority
- CN
- China
- Prior art keywords
- bit
- bit leg
- palm back
- concave surface
- roller
- 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 - Lifetime
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Abstract
The utility model relates to a multiple roller cone bit with a low resistance gage protection structure, in particular to a three roller cone bit, which is suitable for the oil and gas well drilling and the soft-to-hard formation in the mining drilling. The utility model comprises two to five roller cones and palms of roller bits, the differences lie in that a lower concave is arranged on the back of the roller bit palm, the cutting gage protection teeth are arranged on the concave. The cutting gage protection teeth points are higher than the back of the roller bit palm. The utility model has the beneficial effects that: firstly, the lower concave on the back of the roller bit palm reduces the interface between the back of the roller bit palm and the well walls, thus reducing the friction resistance of the roller bits during the operation and lowering the operation torque of the roller bit; secondly, the cutting gage protection teeth arranged on the lower concave can actively cut and repair the rocks on the well walls in a cutting way, which effectively increases the gage protection effect and the rock breaking efficiency of the roller cone bit, so that the drill footage performance and the service life of the roller cone bit are greatly prolonged.
Description
Technical field
The utility model relates to a kind of polydonita wheel drill bit, especially tricone bit of tool lower resistance gauge structure, this polydonita wheel drill bit be applicable in oil and gas well drilling and the mining drilling well from soft to hard formation.
Background technology
The gauge structure of existing polydonita wheel drill bit is positioned at the bottom of slapping the back side on the gear wheel with bit leg, and the middle and upper part at the bit leg palm back side does not have gauge structure, and the whole bit leg palm back side is the light face.Like this, on the one hand, when roller bit cutting, the contact surface of the bit leg palm back side and the borehole wall is big, thereby the frictional resistance that creeps into is bigger, and is all the more so when drill bit is subjected to lateral force, influences and reduced the guarantor's footpath effect and the efficiency of breaking rock of rock bit thus; The middle and upper part at the bit leg palm back side when the borehole wall is rough, is vulnerable to wearing and tearing directly in the face of rock on the other hand, thereby damages the Fuel Tanking Unit that is positioned at bit leg palm middle and upper part, the back side.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art existence and a kind of polydonita wheel drill bit with lower resistance gauge structure is provided, frictional resistance when it can not only reduce rock bit work, reduce the operation torque of drill bit, and can initiatively cut rock of borehole with cut mode, improve the guarantor's footpath effect and the efficiency of breaking rock of drill bit.
For addressing the above problem, the technical scheme that the utility model proposes is: include 2～5 gear wheels 6 and bit leg 1, its difference is on the bit leg palm back of the body 2 low concave surface 3 to be set, and installs cutting gauge teeth 4 on this low concave surface.
Press such scheme, the crown of described cutting gauge teeth 4 (top) is higher than the bit leg palm back side; The low concave surface 3 of bit leg palm back is block groove or block concave surface; Cutting gauge teeth 4 is chisel teeth, blunt conical-ended shape insert or awl tooth etc., can be hard-metal insert or diamond composite teeth on the material; The low concave surface 3 of bit leg palm back can be positioned at bit leg palm back of the body stage casing to last side, also can be whole bit leg palm back of the body stage casing, or carry on the back a side backward in stage casing for the bit leg palm.The low concave surface of bit leg palm back of the body below is 1～100 millimeter apart from the distance h of bit leg shirttail, and the length L of the low concave surface of the bit leg palm back of the body is 10～300 millimeters, and the degree of depth h1 of the low concave surface of the bit leg palm back of the body is 1～50 millimeter, is generally 2～20 millimeters.
The beneficial effects of the utility model are: 1, offer low concave surface at bit leg palm back, the contact surface of the bit leg palm back side and the borehole wall is reduced, thereby reduced the frictional resistance when drill bit is worked, reduced the operation torque of drill bit; 2, install the cutting gauge teeth at low concave surface, this cutting gauge teeth can initiatively cut and repair and scrape rock of borehole with cut mode, and the guarantor's footpath effect and the efficiency of breaking rock of rock bit are effectively improved, thus the drilling depth performance and the application life of improving rock bit.
Description of drawings
Fig. 1 is the three-dimensional structure diagram of an embodiment of the utility model.
Fig. 2 is the three-dimensional structure diagram of the bit leg part among Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the three-dimensional structure diagram of second embodiment of the utility model.
Fig. 5 is the three-dimensional structure diagram of the 3rd embodiment of the utility model.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
First embodiment such as Fig. 1, Fig. 2, shown in Figure 3, it is a tricone bit, include three bit legs 1, the top of bit leg is welded to each other and is integral, constitute bit body, the bottom of bit leg is provided with cantilevered axle, is installed on gear wheel 6 on the cantilevered axle, gear wheel is provided with cutting teeth 8, has been installed on the gauge compact 7 of protecting the footpath effect on the back cone of gear wheel; A block groove is offered to last side (left side) in middle part at the bit leg palm back of the body 2, constitute low concave surface 3, the distance h of this bulk groove bottom margin bit leg shirttail 5 is 20 to 80 millimeters, block groove is 50～100 millimeters along the length L of bit leg axis direction, degree of depth h1 is 2 to 20 millimeters, the cutting gauge teeth 4 of staggered insert 2～5 row's wedge shapes in block groove, the cutting gauge teeth is a hard-metal insert, cutting gauge teeth crown (top) is higher than 1～5 millimeter at the bit leg palm back side, forms low frictional resistance gauge structure thus.The side direction of bit leg is provided with hydraulic structure nozzle 9.
Second embodiment as shown in Figure 4, the main difference part of it and first embodiment is that bit leg palm back of the body middle part offers the groove that traverses the bit leg palm back of the body, insert 3～5 row's cutting gauge teeths 4 in the groove, other structure is identical with first embodiment.
The 3rd embodiment as shown in Figure 5, the main difference part of it and first embodiment be bit leg palm back of the body middle part backward a side offer block groove.Other structure is identical with first embodiment.
Claims (10)
1, a kind of polydonita of tool lower resistance gauge structure wheel drill bit includes 2～5 gear wheels and bit leg, it is characterized in that at bit leg palm back low concave surface being set, and installs the cutting gauge teeth on this low concave surface.
2,, it is characterized in that the crown of described cutting gauge teeth is higher than the bit leg palm back side by the polydonita wheel drill bit of the described tool lower resistance of claim 1 gauge structure.
3,, it is characterized in that the low concave surface of described bit leg palm back is block groove or block concave surface by the polydonita wheel drill bit of claim 1 or 2 described tool lower resistance gauge structures.
4, by the polydonita wheel drill bit of claim 1 or 2 described tool lower resistance gauge structures, it is characterized in that cutting gauge teeth is chisel teeth, blunt conical-ended shape insert or awl tooth.
5, by the polydonita wheel drill bit of the described tool lower resistance of claim 4 gauge structure, it is characterized in that cutting gauge teeth is hard-metal insert or diamond composite teeth.
6, by the polydonita wheel drill bit of claim 1 or 2 described tool lower resistance gauge structures, the low concave surface that it is characterized in that bit leg palm back be positioned at bit leg palm back of the body stage casing to last side.
7,, it is characterized in that the low concave surface of bit leg palm back is positioned at whole bit leg palm back of the body stage casing by the polydonita wheel drill bit of claim 1 or 2 described tool lower resistance gauge structures.
8,, it is characterized in that the low concave surface of bit leg palm back is positioned at a side backward in bit leg palm back of the body stage casing by the polydonita wheel drill bit of claim 1 or 2 described tool lower resistance gauge structures.
9, take turns drill bit by the polydonita of claim 1 or 2 described tool lower resistance gauge structures, it is characterized in that the low concave surface of bit leg palm back of the body below is 1～100 millimeter apart from the distance h of bit leg shirttail, the length L of the low concave surface of the bit leg palm back of the body is 10～300 millimeters, and the degree of depth h1 of the low concave surface of the bit leg palm back of the body is 1～50 millimeter.
10, polydonita wheel drill bit by claim 1 or 2 described tool lower resistance gauge structures, it is characterized in that being a tricone bit, include three bit legs, the top of bit leg is welded to each other and is integral, constitute bit body, the bottom of bit leg is provided with cantilevered axle, be installed on gear wheel on the cantilevered axle, gear wheel is provided with cutting teeth, a block groove is offered to last side in middle part at the bit leg palm back of the body, the distance h of this bulk groove bottom margin bit leg shirttail is 20 to 80 millimeters, block groove is 50～100 millimeters along the length L of bit leg axis direction, degree of depth h1 is 2 to 20 millimeters, the cutting gauge teeth of staggered insert 2～5 row's wedge shapes in block groove, and cutting gauge teeth crown is higher than 1～5 millimeter at the bit leg palm back side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03254131 CN2625558Y (en) | 2003-05-23 | 2003-05-23 | Multiple roller bit with low resistance gage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03254131 CN2625558Y (en) | 2003-05-23 | 2003-05-23 | Multiple roller bit with low resistance gage structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2625558Y true CN2625558Y (en) | 2004-07-14 |
Family
ID=34253448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03254131 Expired - Lifetime CN2625558Y (en) | 2003-05-23 | 2003-05-23 | Multiple roller bit with low resistance gage structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2625558Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2167780A4 (en) * | 2007-05-30 | 2015-11-11 | Halliburton Energy Services Inc | Rotary drill bit with gage pads having improved steerability and reduced wear |
| CN106522845B (en) * | 2016-11-23 | 2018-04-20 | 青岛石大华通科技有限公司 | A kind of gauge device for geological drilling |
-
2003
- 2003-05-23 CN CN 03254131 patent/CN2625558Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2167780A4 (en) * | 2007-05-30 | 2015-11-11 | Halliburton Energy Services Inc | Rotary drill bit with gage pads having improved steerability and reduced wear |
| CN106522845B (en) * | 2016-11-23 | 2018-04-20 | 青岛石大华通科技有限公司 | A kind of gauge device for geological drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130523 Granted publication date: 20040714 |