CN104373044A - Tangential injection type whirl flow jet flow grinding drill bit for horizontal well - Google Patents
Tangential injection type whirl flow jet flow grinding drill bit for horizontal well Download PDFInfo
- Publication number
- CN104373044A CN104373044A CN201410605628.4A CN201410605628A CN104373044A CN 104373044 A CN104373044 A CN 104373044A CN 201410605628 A CN201410605628 A CN 201410605628A CN 104373044 A CN104373044 A CN 104373044A
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- China
- Prior art keywords
- landwaste
- drill bit
- jet
- tangential
- horizontal well
- Prior art date
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- Pending
Links
- 238000000227 grinding Methods 0.000 title abstract description 5
- 238000002347 injection Methods 0.000 title abstract 5
- 239000007924 injection Substances 0.000 title abstract 5
- 239000004576 sand Substances 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims description 20
- 238000011010 flushing procedure Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 11
- 239000011435 rock Substances 0.000 abstract description 27
- 238000005553 drilling Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 13
- 239000007921 spray Substances 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 3
- 238000005406 washing Methods 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000036346 tooth eruption Effects 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a tangential injection type whirl flow jet flow grinding drill bit for a horizontal well. The grinding drill bit mainly comprises a PDC drill bit body and is characterized in that a debris discharging groove in the gauge protection portion of the PDC drill bit body is omitted, and the PDC drill bit body is internally and additionally provided with a tangential injection type rotating jet flow sand washing device, a high-concentration turbulence sand pumping device and a jet flow smashing device. According to the tangential injection type rotating jet flow sand washing device, high-speed rotation jet flow is generated through tangential injection type rotating jet flow spray nozzles, a well bottom whirl flow field beneficial to rock debris cleaning is formed, the stress condition of well bottom rock debris is improved, and the well bottom rock debris cleaning efficiency is improved. The high-concentration turbulence sand pumping device pumps and sucks the well bottom fluid based on the principle of a sand pumping pump, the well bottom pressure difference is reduced, unbalance is achieved, and the mechanical drilling speed is increased. The jet flow smashing device effectively smashes the rock debris based on the principle of a jet mill, the rock debris carrying efficiency is improved, the rock debris bed in the horizontal well is eliminated radically, and safe and efficient drilling of the horizontal well is finally achieved.
Description
Technical field
The invention belongs to drilling well and oil gas engineering field, be specifically related to the tangential pouring-in swirl jet crusher drill of a kind of horizontal well.
Background technology
As everyone knows, take the important problem that rock is horizontal well and extended reach well drilling well, if landwaste carries effect and does not reach requirement, problems can be caused to occur, as high frictional resistance and high moment of torsion, sand setting bit freezing, setting of casing and well cementation difficulty, drill tool wear is serious, enters operational difficulty etc. under logger, even causes drillng operation may be forced to stop.But, horizontal well safe and efficient mud drilling jet mill drill bit (CN201310654747.4) researched and developed by Chinese Petroleum Univ. recently and horizontal well safe and efficient gas drilling jet mill drill bit (CN201310654718.8) not only can reduce bottom hole pressure difference, improve rate of penetration, also based on jet mill principle, landwaste can be pulverized, reach liquid-solid suspension flow regime, can cutting bed fundamentally in elimination of level well.But the shunting action due to jet mill drill bit contrainjector makes shaft bottom mud flow rate cut down to some extent, the bit port number in such shaft bottom reduces, and jet wash scope also obviously reduces.Although the high concentration turbulent flow of jet mill drill bit takes out sand device can reduce bottom hole pressure difference, suction landwaste, because jet wash scope is little, can affect the timely cleaning of shaft bottom landwaste, thus causes the repetition of part landwaste broken, affects efficiency of breaking rock.
Summary of the invention
The object of the present invention is to provide the tangential pouring-in swirl jet crusher drill of a kind of horizontal well, by tangential pouring-in rotating jet sand flushing device, produce the shaft bottom Swirling Flow being conducive to rock clearly, improve the force-bearing situation of shaft bottom landwaste, clear rock efficiency at the bottom of winding shaft; Take out sand device suction well fluids downhole by high concentration turbulent flow, reduce bottom hole pressure difference, realize underbalance and improve rate of penetration; Pulverize landwaste by jet mill device, improve and take rock efficiency, the cutting bed fundamentally in elimination of level well.
For achieving the above object, the technical solution adopted in the present invention is as follows:
The tangential pouring-in swirl jet crusher drill of a kind of horizontal well, comprises PDC drill bit, tangential pouring-in rotating jet sand flushing device, high concentration turbulent flow takes out sand device, jet mill device.
PDC drill bit comprises bit body, sprue, gauge, drill bit end chip area, PDC wing; PDC wing is the working portion of the tangential pouring-in swirl jet crusher drill rock cutting of horizontal well, and its surface is furnished with PDC cutting teeth; Drill bit end chip area is arranged between PDC wing; Gauge is arranged in the outside of drill bit end, and gauge does not arrange chip area.
Tangential pouring-in rotating jet sand flushing device comprises shaft bottom landwaste and stirs and cleaning runner, tangential pouring-in jet nozzle; Shaft bottom landwaste stirs and is communicated with the sprue of PDC drill bit with the entrance of cleaning runner, and shaft bottom landwaste stirs and is connected with the entrance of tangential pouring-in jet nozzle with cleaning runner exit; The outlet of tangential pouring-in jet nozzle is connected with PDC drill bit end chip area, and tangential pouring-in jet nozzle quantity is determined according to drill bit structure; Tangential pouring-in rotating jet sand flushing device produces the key mechanism being conducive to the shaft bottom Swirling Flow of rock clearly, tangential pouring-in jet nozzle and bit synergy produce shaft bottom Swirling Flow, improve the force-bearing situation of bottom rock and landwaste, significantly clear rock efficiency at the bottom of winding shaft, improves rate of penetration.
High concentration turbulent flow is taken out sand device and is comprised landwaste suction pipe, negative pressure cavity; Landwaste suction pipe entrance is connected with the outer end of PDC drill bit end chip area, and the outlet of landwaste suction pipe is connected with negative pressure cavity, and negative pressure cavity outlet is docked and connected with mixing chamber; The negative pressure that negative pressure cavity produces makes shaft bottom local pressure reduce by landwaste suction pipe suction well fluids downhole, reduces pressure reduction, thus promotes landwaste to depart from shaft bottom and accelerate to return, and local underbalance improves rate of penetration.
Jet mill device comprises reverse high-speed jet nozzle, mixing chamber, trunnion, landwaste dissociate accelerating tube, pulverize target body, crushing bin, bypass; Reverse high-speed jet nozzle and tangential pouring-in jet nozzle are oppositely arranged, reverse high-speed jet nozzle entrance is communicated with the sprue of PDC drill bit, the outlet of reverse high-speed jet nozzle is positioned at mixing chamber, mixing chamber and trunnion are docked and connected, trunnion and the landwaste accelerating tube that dissociates is docked and connected, landwaste dissociate accelerating tube outlet be communicated with crushing bin, pulverizing target body is equipped with in crushing bin, pulverize target body face landwaste dissociate accelerating tube outlet, crushing bin is communicated with bypass, and bypass is into the large diffusivity pipe of young outlet; Jet mill device is the key mechanism of the tangential pouring-in swirl jet crusher drill of horizontal well, the reverse high-speed jet jet expansion of jet mill device produces negative pressure on the one hand, and by mixing chamber, negative pressure is delivered to negative pressure cavity, suction landwaste, jet mill device fully pulverizes landwaste based on the ultra-fine grinding principle of high energy-gathering jetting on the other hand, greatly improves the migration efficiency of landwaste.
In sum, compared with prior art, the present invention has following good result:
(1) because the shunting action of the reverse high speed nozzle of current jet mill drill bit makes shaft bottom mud flow rate cut down to some extent, the flushing scope of bottom jet also obviously reduces, thus affects the timely cleaning of shaft bottom landwaste, can affect efficiency of breaking rock further.Tangential pouring-in rotating jet sand flushing device of the present invention produces rotating jet, substantially increase the flushing scope of bottom jet, rotating jet can produce larger tangential velocity in shaft bottom, thus increase shaft bottom Oblique jet, broken landwaste is impelled to speed away shaft bottom, significantly clear rock efficiency at the bottom of winding shaft.
(2) rotating jet that produces of tangential pouring-in rotating jet sand flushing device of the present invention and bit synergy can produce the shaft bottom Swirling Flow being conducive to rock clearly, orderly higher-pressure region and low-pressure area distribution is formed in shaft bottom, improve the force-bearing situation of bottom rock and landwaste, improve rate of penetration.
(3) high concentration turbulent flow of the present invention takes out the principle that sand device utilizes sand pump, and suction well fluids downhole, reduces bottom hole pressure difference, realizes local, shaft bottom underbalance, improves rate of penetration.
(4) jet mill device of the present invention can pulverize landwaste based on the superfine technique of high energy-gathering jetting, greatly reduces the terminal velocity of landwaste in horizontal well, improves and takes rock efficiency, the cutting bed fundamentally in elimination of level well.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the tangential pouring-in swirl jet crusher drill of horizontal well;
Fig. 2 is that the tangential pouring-in swirl jet crusher drill of horizontal well looks schematic diagram along Fig. 1 left side;
Fig. 3 is that the tangential pouring-in swirl jet crusher drill of horizontal well looks schematic diagram along Fig. 1 right side;
Fig. 4 is the cross-sectional schematic of the tangential pouring-in swirl jet crusher drill of horizontal well along A-A in Fig. 1;
Fig. 5 is the cross-sectional schematic of the tangential pouring-in swirl jet crusher drill of horizontal well along B-B in Fig. 1;
Fig. 6 is the reverse high-speed jet nozzle schematic diagram of the tangential pouring-in swirl jet crusher drill of horizontal well;
Fig. 7 is the tangential pouring-in jet nozzle schematic diagram of the tangential pouring-in swirl jet crusher drill of horizontal well;
Fig. 8 is the cross-sectional schematic of tangential pouring-in jet nozzle along A-A in Fig. 7 of the tangential pouring-in swirl jet crusher drill of horizontal well.
In figure: 1, PDC drill bit, 2, tangential pouring-in rotating jet sand flushing device, 3, high concentration turbulent flow takes out sand device, 4, jet mill device; 101, bit body, 102, sprue, 103, gauge, 104, drill bit end chip area, 105, PDC wing; 201, shaft bottom landwaste stirs and cleaning runner, and 202, tangential pouring-in jet nozzle; 301, landwaste suction pipe, 302, negative pressure cavity; 401, reverse high-speed jet nozzle, 402, mixing chamber, 403, trunnion, 404, landwaste dissociates accelerating tube, 405, pulverize target body, 406, crushing bin, 407, bypass.
Detailed description of the invention
Below in conjunction with accompanying drawing, illustrate and be described in detail as follows detailed description of the invention, structure, feature and effect thereof that the present invention proposes:
The tangential pouring-in swirl jet crusher drill of horizontal well, comprises PDC drill bit 1, tangential pouring-in rotating jet sand flushing device 2, high concentration turbulent flow takes out sand device 3, jet mill device 4.
PDC drill bit comprises bit body 101, sprue 102, gauge 103, drill bit end chip area 104, PDC wing 105; PDC wing 105 is working portions of the tangential pouring-in swirl jet crusher drill rock cutting of horizontal well, and its surface is furnished with PDC cutting teeth; Drill bit end chip area 104 is arranged between PDC wing 105; Gauge is arranged in the outside of drill bit end, and gauge does not arrange chip area.
Tangential pouring-in rotating jet sand flushing device 2 comprises shaft bottom landwaste and stirs and cleaning runner 201, tangential pouring-in jet nozzle 202; Shaft bottom landwaste stirs and is communicated with the sprue 102 of PDC drill bit with the cleaning entrance of runner 201, and landwaste stirring in shaft bottom exports with cleaning runner 201 and is connected with the entrance of tangential pouring-in jet nozzle 202; The outlet of tangential pouring-in jet nozzle 202 is connected with PDC drill bit end chip area 104, and tangential pouring-in jet nozzle 202 quantity is determined according to drill bit structure; Tangential pouring-in rotating jet sand flushing device produces the key mechanism being conducive to the shaft bottom Swirling Flow of rock clearly, tangential pouring-in jet nozzle 202 and the effect of PDC drill bit 1 rotary joint produce shaft bottom Swirling Flow, improve the force-bearing situation of bottom rock and landwaste, significantly clear rock efficiency at the bottom of winding shaft, improves rate of penetration.
High concentration turbulent flow is taken out sand device 3 and is comprised landwaste suction pipe 301, negative pressure cavity 302; Landwaste suction pipe 301 entrance is connected with the outer end of PDC drill bit end chip area 104, and landwaste suction pipe 301 outlet is connected with negative pressure cavity 302, and negative pressure cavity 302 exports and is docked and connected with mixing chamber 402; The negative pressure that negative pressure cavity 302 produces aspirates well fluids downhole by landwaste suction pipe 301 makes shaft bottom local pressure reduce, and reduces pressure reduction, thus promotes landwaste to depart from shaft bottom and accelerate to return, and local underbalance improves rate of penetration.
Jet mill device 4 comprises reverse high-speed jet nozzle 401, mixing chamber 402, trunnion 403, landwaste dissociate accelerating tube 404, pulverize target body 405, crushing bin 406, bypass 407, reverse high-speed jet nozzle 401 is oppositely arranged with tangential pouring-in jet nozzle 202, reverse high-speed jet nozzle 401 entrance is communicated with the sprue 102 of PDC drill bit, the outlet of reverse high-speed jet nozzle 401 is positioned at mixing chamber 402, mixing chamber 402 and trunnion 403 are docked and connected, trunnion 403 and the landwaste accelerating tube 404 that dissociates is docked and connected, landwaste dissociate accelerating tube 404 outlet be communicated with crushing bin 406, be equipped with in crushing bin 406 and pulverize target body 405, pulverize target body 405 to face the landwaste accelerating tube 404 that dissociates and export, crushing bin 406 is communicated with bypass 407, bypass 407 is into the large diffusivity pipe of young outlet, jet mill device 4 is key mechanism of the tangential pouring-in swirl jet crusher drill of horizontal well, the reverse high-speed jet nozzle 401 of jet mill device 4 exports and produces negative pressure on the one hand, and by mixing chamber 402, negative pressure is delivered to negative pressure cavity 302, suction landwaste, jet mill device 4 fully pulverizes landwaste based on the ultra-fine grinding principle of high energy-gathering jetting on the other hand, greatly improves the migration efficiency of landwaste.
The course of work of the tangential pouring-in swirl jet crusher drill of horizontal well of the present invention is as follows:
In drilling process, the tangential pouring-in swirl jet crusher drill of horizontal well rotates, and makes the PDC cutting teeth rock cutting on PDC wing 105 produce landwaste.Cleaner for high-pressure drilling fluid is entered by sprue 102 simultaneously, and a part of drilling fluid is sprayed by reverse high-speed jet nozzle 401, and form high-speed jet, high-speed jet produces negative pressure at mixing chamber 402.This negative pressure is delivered to high concentration turbulent flow through mixing chamber 402 and takes out in the negative pressure cavity 302 of sand device 3, negative pressure in negative pressure cavity 302 is aspirated by landwaste suction pipe 301 pairs of well fluids downhole and landwaste, thus reduction bottom hole pressure difference, reduce the chip hold down effect of landwaste, create the insufficient balance condition in shaft bottom, improve rate of penetration.The shaft bottom landwaste that another part drilling fluid enters tangential pouring-in rotating jet sand flushing device 2 stirs with in cleaning runner 201, is sprayed by tangential pouring-in jet nozzle 202.Shaft bottom landwaste is impacted into the turbulent flow of high concentration by the asymmetric High Rotation Speed jet that tangential pouring-in jet nozzle 202 sprays, and the landwaste suction pipe 301 making high concentration turbulent flow take out sand device 3 can be considered to be worth doing and drilling fluid by efficient suction well bed rock.Shaft bottom landwaste and drilling fluid enter the mixing chamber 402 of jet mill device 4 under the swabbing action of reverse high-speed jet nozzle 401 through landwaste suction pipe 301, negative pressure cavity 302.
The reverse high-speed jet nozzle 401 of jet mill device 4 sprays high energy-gathering jetting, produce negative pressure at mixing chamber 402 and entrainment landwaste, shaft bottom landwaste and drilling fluid are imported high energy-gathering jetting at mixing chamber 402 and trunnion 403 place, high energy-gathering jetting dissociates at the accelerating tube 404 that dissociates and is with the landwaste of microcrack, realization is dissociated fragmentation, the surge that collision between alternate and particle, attrition produce and shearing force cause the fragmentation of particle, and realize the acceleration to landwaste.High speed landwaste high speed impact pulverizes target body 405, utilizes instant impact, water wedge to pulverize landwaste.Fine rock chips with microcrack is pulverized through multiple reflections collision further at crushing bin 406, and the landwaste after pulverizing and drilling fluid mixed thing speed in bypass 407 enters annular space after lowering.
Claims (4)
1. the tangential pouring-in swirl jet crusher drill of horizontal well, comprise PDC drill bit, it is characterized in that at the chip area eliminating PDC bit gauge protection position, and installed tangential pouring-in rotating jet sand flushing device, high concentration turbulent flow additional at PDC drill bit internal and take out sand device, jet mill device.
2. the tangential pouring-in swirl jet crusher drill of horizontal well according to claim 1, is characterized in that: described tangential pouring-in rotating jet sand flushing device comprises shaft bottom landwaste and stirs and cleaning runner, tangential pouring-in jet nozzle; Shaft bottom landwaste stirs and is communicated with the sprue of PDC drill bit with the entrance of cleaning runner, and shaft bottom landwaste stirs and is connected with the entrance of tangential pouring-in jet nozzle with cleaning runner exit; The outlet of tangential pouring-in jet nozzle is connected with PDC drill bit end chip area.
3. the tangential pouring-in swirl jet crusher drill of horizontal well according to claim 1, is characterized in that: described high concentration turbulent flow is taken out sand device and comprised landwaste suction pipe, negative pressure cavity; Landwaste suction pipe entrance is connected with the outer end of PDC drill bit end chip area, and the outlet of landwaste suction pipe is connected with negative pressure cavity, and negative pressure cavity outlet is docked and connected with mixing chamber.
4. the tangential pouring-in swirl jet crusher drill of horizontal well according to claim 1, is characterized in that: described jet mill device comprises reverse high-speed jet nozzle, mixing chamber, trunnion, landwaste dissociate accelerating tube, pulverize target body, crushing bin, bypass; Reverse high-speed jet nozzle and tangential pouring-in jet nozzle are oppositely arranged, reverse high-speed jet nozzle entrance is communicated with the sprue of PDC drill bit, the outlet of reverse high-speed jet nozzle is positioned at mixing chamber, mixing chamber and trunnion are docked and connected, trunnion and the landwaste accelerating tube that dissociates is docked and connected, landwaste dissociate accelerating tube outlet be communicated with crushing bin, be equipped with in crushing bin pulverize target body face landwaste dissociate accelerating tube outlet, crushing bin is communicated with bypass, and bypass is into the large diffusivity pipe of young outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605628.4A CN104373044A (en) | 2014-11-03 | 2014-11-03 | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605628.4A CN104373044A (en) | 2014-11-03 | 2014-11-03 | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104373044A true CN104373044A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410605628.4A Pending CN104373044A (en) | 2014-11-03 | 2014-11-03 | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806173A (en) * | 2015-05-11 | 2015-07-29 | 中国石油大学(北京) | Oblique-crossing back mixing type jet mill drill bit of horizontal well |
| CN104806184A (en) * | 2015-05-11 | 2015-07-29 | 中国石油大学(北京) | Drilling jet flow mill rock crushing short joint of horizontal well |
| CN105443044A (en) * | 2015-12-30 | 2016-03-30 | 深圳新速通石油工具有限公司 | Ring current injecting and confining pressure reducing drill bit |
| CN106285493A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in horizontal well spinning pulse |
| CN106285492A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in tandem type pulse enhanced |
| CN106285491A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in the churning pulse of center |
| CN106437570A (en) * | 2016-11-21 | 2017-02-22 | 西南石油大学 | Drilling type continuous sand blasting device |
| CN107386979A (en) * | 2017-08-23 | 2017-11-24 | 中国石油大学(北京) | Interior chip removal pulsing jet is depressured drill bit |
| CN107386987A (en) * | 2017-08-23 | 2017-11-24 | 中国石油大学(北京) | Interior chip removal jet stream decompression drill bit |
| CN108316907A (en) * | 2018-01-08 | 2018-07-24 | 中国矿业大学 | It is a kind of to take abrasive material formula hydraulic slotted liner technique drill bit certainly |
| CN114458161A (en) * | 2022-04-14 | 2022-05-10 | 金石钻探(唐山)股份有限公司 | Non-hard rock coring bit and processing technology thereof |
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| CN104806173A (en) * | 2015-05-11 | 2015-07-29 | 中国石油大学(北京) | Oblique-crossing back mixing type jet mill drill bit of horizontal well |
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Application publication date: 20150225 |