CN201574689U - Large-diameter stepped assembled combined drill bit - Google Patents
Large-diameter stepped assembled combined drill bit Download PDFInfo
- Publication number
- CN201574689U CN201574689U CN2009202773403U CN200920277340U CN201574689U CN 201574689 U CN201574689 U CN 201574689U CN 2009202773403 U CN2009202773403 U CN 2009202773403U CN 200920277340 U CN200920277340 U CN 200920277340U CN 201574689 U CN201574689 U CN 201574689U
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- reaming
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Abstract
The utility model relates to a cascaded combination drill bit of assembling of heavy-calibre, by main bit body, the reaming cone, guide's central bit, water hole and connecting thread are constituteed, this drill bit forms the echelonment by guide's drill bit and reaming cone, make the original free surface that produces when creeping into broken stratum, form present three free surface, broken rock efficiency has been improved, the weight of boring that has reduced the drill bit (the weight of boring than central bit is a little bigger), about need bore 15 tons, simultaneously because the cone on the step pulley that plays the reaming effect is rolling, it rolls with the cutting to strike to the breakage of stratum and pore wall. Therefore, the rotary resistance of the drill bit is greatly reduced, the drilling strike phenomenon and the drill rod breaking accident are eliminated, the rock breaking effect is improved, the required drilling pressure during drilling of the drill bit is reduced, the drilling cost is reduced, the accident is reduced, the drilling speed is improved, and the well forming time is shortened.
Description
Technical field
The utility model relates to a kind of heavy caliber staged assembling combination drill bit, and this drill bit is applicable to hydrological well sinking shaft industry.
Background technology
Traditional heavy caliber well sinking shaft technology generally takes path to play (finished product tricone bit) heavy caliber expansion (heavy caliber tubular rib fin drilling tool), reaming step by step, finish the bigbore well of a bite, generally need carry out several grades of reamings and just can reach the design aperture, prolonged the construction period of well, increased the blocking radius of flushing liquor, influenced well washing effect, reduced the water yield of well the aquifer.Because heavy caliber tubular rib fin drilling tool rib fin is for being weldingly fixed on the tubular drilling tool, therefore when reaming, play the scraper effect, when creeping into scraping is carried out on stratum and hole wall, the drilling tool steering resistance is big when creeping into, and often occurs stopping phenomenon and the breaking of rod bar accident of boring in the reaming process.
Continuous development along with national economy and hydrogeological sinking technique, hydrological well is also increasing to the requirement in aperture, in recent years in hydrological well sinking shaft industry, in order to save cost, improve water yield of well, reached Φ 750mm, but oil drilling rock bit finished product tricone bit is when generally being Φ 26 to the maximum (Φ 660.4mm) in the aperture of the hydrological well of certain areas design, Φ 750mm finished product tricone bit customized costs an arm and a leg, and approximately needs 300,000 yuans.Tricone bit is pressed oil drilling department regulation in use to the having relatively high expectations of drilling technology parameter, in hard and hard stratum, the rock bit pressure on the per inch length should reach the 1.5-2 ton, the mud flush liquid measure be the 1800-3000 litre/minute.Φ 750mm bore drill bit closes 29.5 inches, promptly needs the pressure of the drill 44.25-59 ton, but limited by capacities of equipment such as the employed boring mechanic of hydrogeologic drilling, drilling tool, is difficult to reach above-mentioned drilling technology parameter.
Problem at present existence, the utility model has designed a kind of heavy caliber staged assembling combination drill bit, this drill bit has changed traditional heavy caliber water well drilling and has adopted small-bore beating (finished product tricone bit) heavy caliber to expand (heavy caliber tubular rib fin drilling tool), the backward sinking shaft technology of reaming step by step.Realized the disposable well drilling technology of heavy caliber well, significantly shortened the one-tenth well time, reduced the blocking radius of flushing liquor, reduced duration of well flushing, improved well washing effect and well-flushing quality, increased the water yield of well the aquifer.
Summary of the invention
The utility model purpose is, a kind of heavy caliber staged assembling combination drill bit is provided, be by main bit body, the reaming gear wheel, guide's center bit, hydrophthalmia and connecting thread are formed, this drill bit forms stepped by guide's drill bit and reaming gear wheel, make a scope of freedom that produces when creeping into broken formation originally, form three present scope of freedoms, improved efficiency of breaking rock, reduced the pressure of the drill (the pressure of the drill than center bit is bigger) of drill bit, approximately need 15 tons of the pressure of the drill,, be that impact-rolling adds cutting simultaneously to the fragmentation of stratum and hole wall because the gear wheel that plays on the stepped wheel of reaming effect rolls.Therefore significantly reduce the steering resistance of drill bit, eliminated to stop and bored phenomenon and breaking of rod bar accident, improved rock breaking efficiency, reduced the pressure of the drill required when drill bit creeps into, reduced the cost that creeps into, reduced accident, improved drilling speed, shortened the one-tenth well time.
Heavy caliber staged assembling combination drill bit of the present invention, this drill bit is made up of main bit body, reaming gear wheel, guide's center bit, hydrophthalmia and connecting thread, the fixing reaming gear wheel (2) respectively on the top of main bit body (1), fixing guide's center bit (3) respectively in the bottom of main bit body (1), formerly the plane between the guiding center drill bit (3) is provided with hydrophthalmia (4), and the top of main bit body (1) is connecting thread (5).
Reaming gear wheel (2) is fixed on the external surface of main bit body (1) for impartial the arrangement.
Guide's center bit (3) overall fixed triangular in shape is on the plane of the bottom of main bit body (1).
The guide's center bit (3) that is fixed on the plane of reaming gear wheel (2) and the bottom that is fixed on main bit body (1) on the external surface of main bit body (1) forms stepped.
Description of drawings
Fig. 1 is the utility model structural representation
The specific embodiment
Further describe and provide embodiment below in conjunction with accompanying drawing
Heavy caliber staged assembling combination drill bit described in the utility model, this drill bit is by main bit body, the reaming gear wheel, guide's center bit, hydrophthalmia and connecting thread are formed, the fixing reaming gear wheel 2 respectively on the top of main bit body 1, reaming gear wheel 2 is fixed on the external surface of main bit body 1 for impartial the arrangement, wherein three isometrical, three are not isometrical, fixing guide's center bit 3 respectively in the bottom of main bit body 1, guide's center bit 3 overall fixed triangular in shape are on the plane of the bottom of main bit body 1, the guide's center bit 3 that is fixed on the plane of reaming gear wheel 2 and the bottom that is fixed on main bit body 1 on the external surface of main bit body 1 forms stepped, formerly the plane between the guiding center drill bit 3 is provided with hydrophthalmia 4, and the top of main bit body 1 is a connecting thread 5.
In river seedbed, Milan, Ruoqiang county water supply well sinking shaft construction, at areal MC3 well, MC4 well two well well locations are at a distance of 1 kilometer, under identical stratum and hydrogeological conditions, well depth is 180m, the aperture is Φ 750mm, adopt heavy caliber staged assembling combination drill bit to be connected with drilling tool in the MC4 well by the connecting thread 5 at drill bit top, the rotary motive power of rig output is delivered to drill bit by drilling tool, heavy caliber staged assembling combination drill bit is turned round in wellhole, form three free work planes of a staged by guide's drill bit 3 of drill bit and six reaming gear wheels 2 of the welding on the main bit body 1, stratum in the well is produced graded crushing, disposable Cheng Jing, 11 days sinking shaft time, duration of well flushing is 3 days, Cheng Jinghou individual well water yield 8277.36m
3/ d.Adopt traditional small-bore beating (finished product tricone bit) heavy caliber to expand (heavy caliber tubular rib fin drilling tool) in the MC3 well, the sinking shaft technology of reaming step by step, the 51 days sinking shaft time (3 of breaking of rod bar accidents wherein take place), duration of well flushing is 14 days, Cheng Jinghou individual well water yield 3888m
3/ d.
Through contrast, adopt heavy caliber staged assembling combination drill bit to increase substantially than former drill bit sinking shaft efficient, avoided the generation of drilling accident, shortened duration of well flushing, improved the individual well water yield.
In hydrological well sinking shaft construction, adopt heavy caliber staged assembling combination drill bit, success cracked the insoluble problems of original traditional hydrogeologic drilling technology, shown many superiority and the exploration effects of giving prominence to.
Claims (4)
1. heavy caliber staged assembling combination drill bit, it is characterized in that this drill bit is made up of main bit body, reaming gear wheel, guide's center bit, hydrophthalmia and connecting thread, the fixing reaming gear wheel (2) respectively on the top of main bit body (1), fixing guide's center bit (3) in the bottom of main bit body (1), formerly the plane between the guiding center drill bit (3) is provided with hydrophthalmia (4), and the top of main bit body (1) is connecting thread (5).
2. heavy caliber staged assembling combination drill bit according to claim 1 is characterized in that reaming gear wheel (2) is fixed on the external surface of main bit body (1) for impartial the arrangement.
3. heavy caliber staged assembling combination drill bit according to claim 1 is characterized in that guide's center bit (3) overall fixed triangular in shape is on the plane of the bottom of main bit body (1).
4. according to claim 1 and 2 and 3 described heavy caliber staged assembling combination drill bits, the guide's center bit (3) that it is characterized in that being fixed on the plane of reaming gear wheel (2) and the bottom that is fixed on main bit body (1) on the external surface of main bit body (1) forms stepped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202773403U CN201574689U (en) | 2009-12-29 | 2009-12-29 | Large-diameter stepped assembled combined drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202773403U CN201574689U (en) | 2009-12-29 | 2009-12-29 | Large-diameter stepped assembled combined drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574689U true CN201574689U (en) | 2010-09-08 |
Family
ID=42694565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202773403U Expired - Fee Related CN201574689U (en) | 2009-12-29 | 2009-12-29 | Large-diameter stepped assembled combined drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574689U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400646A (en) * | 2011-11-30 | 2012-04-04 | 四川深远石油钻井工具有限公司 | Composite bit formed by rotary cut bit and roller bit |
| CN102434105A (en) * | 2011-11-30 | 2012-05-02 | 四川深远石油钻井工具有限公司 | Composite bit with rotary cut rock-breaking function |
| CN104870745A (en) * | 2012-12-28 | 2015-08-26 | 哈利伯顿能源服务公司 | Systems and methods for hydraulic balancing downhole cutting tools |
| CN111088949A (en) * | 2019-11-29 | 2020-05-01 | 天津立林钻头有限公司 | Novel cone-PDC composite drill bit |
-
2009
- 2009-12-29 CN CN2009202773403U patent/CN201574689U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400646A (en) * | 2011-11-30 | 2012-04-04 | 四川深远石油钻井工具有限公司 | Composite bit formed by rotary cut bit and roller bit |
| CN102434105A (en) * | 2011-11-30 | 2012-05-02 | 四川深远石油钻井工具有限公司 | Composite bit with rotary cut rock-breaking function |
| CN102400646B (en) * | 2011-11-30 | 2015-05-20 | 四川深远石油钻井工具股份有限公司 | Composite bit formed by rotary cut bit and roller bit |
| CN102434105B (en) * | 2011-11-30 | 2015-06-24 | 四川深远石油钻井工具股份有限公司 | Composite bit with rotary cut rock-breaking function |
| CN104870745A (en) * | 2012-12-28 | 2015-08-26 | 哈利伯顿能源服务公司 | Systems and methods for hydraulic balancing downhole cutting tools |
| CN111088949A (en) * | 2019-11-29 | 2020-05-01 | 天津立林钻头有限公司 | Novel cone-PDC composite drill 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: 20100908 Termination date: 20181229 |