CN2318386Y - Runner and teeth distributed of anti-drop tri-cone rotary drill bit - Google Patents
Runner and teeth distributed of anti-drop tri-cone rotary drill bit Download PDFInfo
- Publication number
- CN2318386Y CN2318386Y CN 97237686 CN97237686U CN2318386Y CN 2318386 Y CN2318386 Y CN 2318386Y CN 97237686 CN97237686 CN 97237686 CN 97237686 U CN97237686 U CN 97237686U CN 2318386 Y CN2318386 Y CN 2318386Y
- Authority
- CN
- China
- Prior art keywords
- tooth
- drill bit
- gear wheel
- runner
- tri
- 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
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- Earth Drilling (AREA)
Abstract
The utility model relates to an anti-drop tri-cone drill bit used for the well drilling of petroleum mines, which is an improvement of flow passage design and the teeth distribution of the drill bit, namely, a tooth slot and an intertooth space slot are communicated and have slippery transition, and the edge outlet height differences and the installation angles of an external row tooth and a middle row tooth are reconstructed reasonably, namely, the edge outlet of a tooth ring is divided into three-step and three-direction tooth distribution. The pattern of the bottom of a well is improved by the anti-drop tri-cone drill bit, and the optimal cutting, cleaning and chip removal of the tri-cone drill bit are obtained. The tooth distribution of the utility model improves the cutting ability and the abradability of tooth, and can cause the drilling speed to be improved for 10% to 40% with large range of application, and drilling bits of two contiguous models can be replaced.
Description
The utility model relates to the improvement of oil drilling preventing gear wheel from dropping off drill bit, the particularly runner of preventing gear wheel from dropping off drill bit and cloth tooth.
In recent years, be to improve the efficient and the technological level of oil drilling, the research and technology innovation of rock bit has been obtained breakthrough achievement.The diamond tooth rock bit be used to cut with fastness, bottom jet regulate automatically, the application of composite material sealing, these all impel drilling engineering to enter a brand-new stage.Yet the design of cutting structure is comparatively backward, and particularly the runner design aspect is still blank.
Existing rock bit, especially soft type drill bit, replace chip removal ability in the stratum creeping into soft formation and soft or hard, the time folded tooth phenomenon arranged, when strengthening the pressure of the drill, wheel body touches stratum or pump power when not enough, it is bad that the capital causes the shaft bottom to clean, the chip removal ability is gone back balled bit sometimes, overslaugh greatly the use of drilling efficiency and drill bit.In addition, the shoe of bottom hole pattern lid coefficient difference also is the big defective in the present cloth tooth.
The purpose of this utility model is just at the runner and the cloth tooth problem of top described preventing gear wheel from dropping off drill bit, new corrective measure is proposed, with gear wheel shell inter-tooth slots and first sliding joining of teeth groove, and outer, the intermediate row teeth of gear wheel cutting structure irised out sword branch third gear, three-dimensional is carried out the cloth tooth, has both opened up the shaft bottom runner of rock bit, improved again tooth height of protrusion, solved the folded tooth problem, improved the shaft bottom coverage coefficient simultaneously, for the used rock bit of oil drilling has been made another new contribution.
The purpose of this utility model is realized by following measure:
The between cog of insert cone processing grooving slipped over to cross with teeth groove unit becomes runner, its runner apart from root surface apart the 0.5-2.5 millimeter join.
Inserted, diamond tooth or outer rows of teeth, each gear ring branch third gear of intermediate row teeth of washing tooth go out sword, according to stratum that these drill bits bore, require tooth depth to differ the 1-5 millimeter, and are symmetrically distributed.Go out sword the highest a grade with wedge tooth or cone wedge shaped tooth, and towards the gear wheel rotation move towards the cloth tooth, go out one grade that sword takes second place and be the oblique cloth tooth of arbitrary shape tooth, go out minimum one grade of sword, guarantee not bump under the situation of tooth, widen tooth as far as possible, do camber (spoon shape) tooth, perpendicular to the horizontal cloth tooth of trend.So just, the shaft bottom runner and the cloth tooth of rock bit have been opened up.This scheme all can adopt on any drill bit, can guarantee rational shaft bottom coverage coefficient, reduces shaft bottom back of the body beam and unevenness, becomes the most rational bottom hole pattern recently.
Fig. 1 is a cross-sectional view of the present utility model.
Fig. 2 is an insert cone.
Fig. 3 is mill teeth or diamond tooth gear wheel.
Below in conjunction with accompanying drawing structure of the present utility model and working condition are described further.
Among Fig. 1, the preventing gear wheel from dropping off drill bit by drill bit 1, equalizer 2, preventing gear wheel from dropping off device 3, lubricious system 4, bottom jet regulator and gear wheel 6 are formed joins inter-tooth slots 8 and 7 yuan of cunnings of teeth groove.Gear wheel outer rows of teeth 61 is moved towards tooth, 62 for time going out the oblique tooth of sword, 63 for hanging down the sword transverse teeth for exceeding sword among Fig. 2, Fig. 3, and symmetrical distribution, and the intermediate row teeth circle of gear wheel is with to efflux gear ring cloth tooth identical.Cause the clarification in certain roles of each grade tooth like this, promptly cut, scrape and cut, scrape the effect of squeezing, formed a kind of high speed driving mechanism.The landwaste that teeth groove 7, inter-tooth slots 8 cooperate mud (cleaning fluid) that crowded fragmentation is scraped in cutting is in time taken away eliminating ground.
The utility model compared with prior art has the following advantages:
1. the utility model arranges the division of labor of runner and cloth tooth, has improved BHP, reaches rock bit The kilter of good cutting and cleaning, chip removal.
2. this application range of products increases, and can replace adjacent two model drill bits, can save substantial contribution.
3. new cloth tooth scheme, improved tooth cutting power, wearability, extended the sharp of whole cutting structure Degree and life-span, can make drilling speed improve 10-40%.
Claims (1)
1. the runner of preventing gear wheel from dropping off drill bit and cloth tooth, the preventing gear wheel from dropping off drill bit is made up of drill bit 1, equalizer 2, preventing gear wheel from dropping off device 3, lubricating system 4, bottom jet regulator 5, gear wheel 6 etc., it is characterized in that with the inter-tooth slots 8 of gear wheel shell and 7 yuan of cunnings of teeth groove formation runner that joins runner edge and the root surface distance of joining is the 0.5-2.5 millimeter; Outer, the intermediate row teeth of gear wheel cutting structure are irised out sword branch third gear three-dimensional cloth tooth, tooth depth differs the 1-5 millimeter, exceed sword 61 and be chisel teeth or cone wedge shaped tooth, and move towards to install the cloth tooth towards gear wheel rotation, inferiorly go out sword 62 and be the arbitrary shape tooth, oblique installation cloth tooth hangs down sword 63 and is scoop chisel insert, its width is as the criterion not bump tooth, and perpendicular to the horizontal installation cloth tooth that moves towards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237686 CN2318386Y (en) | 1997-09-08 | 1997-09-08 | Runner and teeth distributed of anti-drop tri-cone rotary drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237686 CN2318386Y (en) | 1997-09-08 | 1997-09-08 | Runner and teeth distributed of anti-drop tri-cone rotary drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2318386Y true CN2318386Y (en) | 1999-05-12 |
Family
ID=33948275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237686 Expired - Fee Related CN2318386Y (en) | 1997-09-08 | 1997-09-08 | Runner and teeth distributed of anti-drop tri-cone rotary drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2318386Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595416C (en) * | 2004-03-02 | 2010-03-24 | 霍利贝顿能源服务公司 | Roller cone bit with enhanced cutting elements and cutting structure |
-
1997
- 1997-09-08 CN CN 97237686 patent/CN2318386Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595416C (en) * | 2004-03-02 | 2010-03-24 | 霍利贝顿能源服务公司 | Roller cone bit with enhanced cutting elements and cutting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |