CN104806173A - Oblique-crossing back mixing type jet mill drill bit of horizontal well - Google Patents
Oblique-crossing back mixing type jet mill drill bit of horizontal well Download PDFInfo
- Publication number
- CN104806173A CN104806173A CN201510234415.XA CN201510234415A CN104806173A CN 104806173 A CN104806173 A CN 104806173A CN 201510234415 A CN201510234415 A CN 201510234415A CN 104806173 A CN104806173 A CN 104806173A
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- Prior art keywords
- landwaste
- drill bit
- oblique
- negative pressure
- jet mill
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- 238000002156 mixing Methods 0.000 title claims abstract description 62
- 239000004576 sand Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 19
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 abstract description 14
- 239000011435 rock Substances 0.000 abstract description 13
- 238000005520 cutting process Methods 0.000 abstract description 9
- 229910003460 diamond Inorganic materials 0.000 abstract 1
- 239000010432 diamond Substances 0.000 abstract 1
- 230000035515 penetration Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000036346 tooth eruption Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000000227 grinding 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
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action 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
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an oblique-crossing back mixing type jet mill drill bit of a horizontal well. The oblique-crossing back mixing type jet mill drill bit mainly comprises a PDC (polycrystalline diamond compact) drill bit, and is characterized in that a chip removal groove in the gauge protection part of the PDC drill bit is removed, and a turbulence negative pressure sand suction device and an oblique-crossing back mixing type jet crushing device are additionally arranged in the PDC drill bit; the turbulence negative pressure sand suction device is used for sucking the fluid at the well bottom according to the principle of a sand suction pump, so as to reduce the pressure difference of the well bottom, realize the underbalance, and improve the drilling speed of the machine; the oblique-crossing back mixing type jet crushing device is used for effectively crushing the rock cuttings according to the principle of an oblique-crossing back mixing type jet mill, so as to improve the cutting carrying efficiency, fundamentally eliminate a cutting bed in the horizontal well, and finally realize the safety and high-efficiency drilling of the horizontal well.
Description
Technical field
The invention belongs to drilling well and oil gas engineering field, mixing jet mill drill bit after being specifically related to a kind of horizontal well oblique.
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 jet mill bit hydraulic complex structure, processing is got up more difficult, and jet mill drill bit reverse high-speed jet nozzle distance drill bit end is comparatively far away, and the effect reducing bottom hole pressure difference is not fine, and therefore, its hydraulic structure can simplify optimization further.
Summary of the invention
Mixing jet mill drill bit after the object of the present invention is to provide a kind of horizontal well oblique, takes out sand device suction well fluids downhole by turbulent flow negative pressure, reduces bottom hole pressure difference, realize underbalance and improve rate of penetration; Pulverize landwaste by jet mill device mixing after oblique, 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:
Mixing jet mill drill bit after a kind of horizontal well oblique, comprises PDC drill bit, turbulent flow negative pressure mixing jet mill device after taking out sand device, oblique.
PDC drill bit comprises bit body, sprue, gauge, drill bit end chip area, PDC wing; PDC wing is the working portion of mixing jet mill bit cutting rock after horizontal well oblique, 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.
Turbulent flow negative pressure is taken out sand device and is comprised shaft bottom landwaste stirring and washer jet, landwaste suction pipe; Shaft bottom landwaste stirs and is communicated with the sprue of PDC drill bit with the entrance of washer jet, and shaft bottom landwaste stirs and is connected with PDC drill bit end chip area with the outlet of washer jet; 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 communicated with the outside of negative pressure mixing chamber; It is suction well fluids downhole that turbulent flow negative pressure takes out sand device, reduce bottom hole pressure difference, realize underbalance and improve the key mechanism of rate of penetration, the shaft bottom landwaste of unsymmetrical arrangement stirs and produces shaft bottom Turbulent Flow Field with washer jet and bit synergy on the one hand, improve the force-bearing situation of bottom rock and landwaste, clear rock efficiency at the bottom of winding shaft, on the other hand, the negative pressure that negative pressure mixing chamber produces makes shaft bottom local pressure reduce by landwaste suction pipe suction well fluids downhole, reduce pressure reduction, thus promote landwaste to depart from shaft bottom and accelerate to return, local underbalance improves rate of penetration.
After oblique, mixing jet mill device comprises reverse high-speed jet nozzle, negative pressure mixing chamber, trunnion, landwaste dissociate accelerating tube, pulverize target body, crushing bin, bypass, reverse high-speed jet nozzle and shaft bottom landwaste stir and oppositely arrange with washer jet, reverse high-speed jet nozzle entrance is communicated with the sprue of PDC drill bit, the outlet of reverse high-speed jet nozzle and the lower end UNICOM of negative pressure mixing chamber, upper end and the trunnion of negative pressure mixing chamber 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, pulverizing the dissociate axis of accelerating tube of the target surface of target body and landwaste is the angle of 0 °-90 °, crushing bin is communicated with bypass, bypass is into the large diffusivity pipe of young outlet, after oblique, mixing jet mill device is the key mechanism of mixing jet mill drill bit after horizontal well oblique, after oblique, the reverse high-speed jet jet expansion of mixing jet mill device produces negative pressure at negative pressure mixing chamber on the one hand, suction landwaste, after oblique, mixing 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 current jet mill bit jet crusher drill hydraulic structure is complicated, the outlet of reverse high-speed jet nozzle is positioned at mixing chamber, and processing is got up more difficult.The outlet of reverse high-speed jet nozzle of the present invention and the lower end UNICOM of negative pressure mixing chamber, and stir with shaft bottom landwaste and instead of the bit nozzle of current jet mill drill bit with washer jet and shaft bottom landwaste stirs and cleans runner, simplify the hydraulic structure of current jet mill bit jet crusher drill, allowed it more easily process.
(2) because current jet mill drill bit reverse high-speed jet jet expansion distance drill bit end is comparatively far away, the effect reducing bottom hole pressure difference is not fine.The outlet of reverse high-speed jet nozzle of the present invention and the lower end UNICOM of negative pressure mixing chamber, and the outlet of landwaste suction pipe is communicated with the outside of negative pressure mixing chamber, shorten the distance of jet mill drill bit reverse high-speed jet jet expansion distance drill bit end, effectively can aspirate well fluids downhole, further reduction bottom hole pressure difference, realize local, shaft bottom underbalance, effectively improve rate of penetration.
(3) after oblique of the present invention, mixing jet mill device 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 mixing jet mill drill bit after horizontal well oblique;
Fig. 2 is that after horizontal well oblique, mixing jet mill drill bit looks schematic diagram along Fig. 1 right side;
In figure: 1, PDC drill bit, 2, turbulent flow negative pressure takes out sand device, 3, mixing jet mill device after oblique; 101, bit body, 102, sprue, 103, gauge, 104, drill bit end chip area, 105, PDC wing; 201, shaft bottom landwaste stirs and washer jet, and 202, landwaste suction pipe; 301, reverse high-speed jet nozzle, 302, negative pressure mixing chamber, 303, trunnion, 304, landwaste dissociates accelerating tube, 305, pulverize target body, 306, crushing bin, 307, 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:
Mixing jet mill drill bit after horizontal well oblique, comprises PDC drill bit 1, turbulent flow negative pressure mixing jet mill device 3 after taking out sand device 2, oblique.
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 mixing jet mill bit cutting rock after horizontal well oblique, 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.
Turbulent flow negative pressure is taken out sand device 2 and is comprised shaft bottom landwaste stirring and washer jet 201, landwaste suction pipe 202, shaft bottom landwaste stirs and is communicated with the sprue 102 of PDC drill bit 1 with the entrance of washer jet 201, and shaft bottom landwaste stirs and is connected with PDC drill bit end chip area 104 with the outlet of washer jet 201, landwaste suction pipe 202 entrance is connected with the outer end of PDC drill bit end chip area 104, and landwaste suction pipe 202 outlet is communicated with the outside of negative pressure mixing chamber 302, it is suction well fluids downhole that turbulent flow negative pressure takes out sand device 2, reduce bottom hole pressure difference, realize underbalance and improve the key mechanism of rate of penetration, the shaft bottom landwaste of unsymmetrical arrangement stirs and produces shaft bottom Turbulent Flow Field with washer jet 201 and bit synergy on the one hand, improve the force-bearing situation of bottom rock and landwaste, clear rock efficiency at the bottom of winding shaft, on the other hand, the negative pressure that negative pressure mixing chamber 302 produces aspirates well fluids downhole by landwaste suction pipe 202 makes shaft bottom local pressure reduce, reduce pressure reduction, thus promote landwaste to depart from shaft bottom and accelerate to return, local underbalance improves rate of penetration.
After oblique, mixing jet mill device 3 comprises reverse high-speed jet nozzle 301, negative pressure mixing chamber 302, trunnion 303, landwaste dissociate accelerating tube 304, pulverize target body 305, crushing bin 306, bypass 307, reverse high-speed jet nozzle 301 stirs with shaft bottom landwaste and oppositely arranges with washer jet 201, reverse high-speed jet nozzle 301 entrance is communicated with the sprue 102 of PDC drill bit, the outlet of reverse high-speed jet nozzle 301 and the lower end UNICOM of negative pressure mixing chamber 302, upper end and the trunnion 303 of negative pressure mixing chamber 302 are docked and connected, trunnion 303 and the landwaste accelerating tube 304 that dissociates is docked and connected, landwaste dissociate accelerating tube 304 outlet be communicated with crushing bin 306, be equipped with in crushing bin 306 and pulverize target body 305 and face the landwaste accelerating tube 304 that dissociates and export, pulverizing the dissociate axis of accelerating tube 304 of the target surface of target body 305 and landwaste is the angle of 0 °-90 °, crushing bin 306 is communicated with bypass 307, bypass 307 is into the large diffusivity pipe of young outlet, after oblique, mixing jet mill device 3 is key mechanism of mixing jet mill drill bit after horizontal well oblique, after oblique, the reverse high-speed jet nozzle 301 of mixing jet mill device 3 exports and produces negative pressure at negative pressure mixing chamber 302 on the one hand, suction landwaste, after oblique, mixing jet mill device 3 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.
After horizontal well oblique of the present invention, the course of work of mixing jet mill drill bit is as follows:
In drilling process, mixing jet mill bit after horizontal well oblique, 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, part drilling fluid is sprayed by reverse high-speed jet nozzle 301, form high-speed jet, high-speed jet produces negative pressure at negative pressure mixing chamber 302, negative pressure in negative pressure mixing chamber 302 is aspirated by landwaste suction pipe 202 pairs of well fluids downhole and landwaste, thus reduces bottom hole pressure difference, reduces the chip hold down effect of landwaste, create the insufficient balance condition in shaft bottom, improve rate of penetration.Another part drilling fluid enters turbulent flow negative pressure and takes out the shaft bottom landwaste stirring of sand device 2 with in washer jet 201, and sprays with high-speed jet.Shaft bottom landwaste stirs the turbulent flow that shaft bottom landwaste is impacted into high concentration by the asymmetric high-speed jet sprayed with washer jet 201, and landwaste suction pipe 202 can be considered to be worth doing and drilling fluid by efficient suction well bed rock.Shaft bottom landwaste and drilling fluid enter negative pressure mixing chamber 302 through landwaste suction pipe 202 under the swabbing action of reverse high-speed jet nozzle 301.
After oblique, the reverse high-speed jet nozzle 301 of mixing jet mill device 3 sprays high energy-gathering jetting, produce negative pressure at negative pressure mixing chamber 302 and entrainment landwaste, shaft bottom landwaste and drilling fluid are imported high energy-gathering jetting at negative pressure mixing chamber 302 and trunnion 303 place, high energy-gathering jetting dissociates at the accelerating tube 304 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 305, utilizes instant impact, water wedge to pulverize landwaste.Fine rock chips with microcrack is pulverized through multiple reflections collision further at crushing bin 306, and the landwaste after pulverizing and drilling fluid mixed thing speed in bypass 307 enters annular space after lowering.
Claims (1)
1. a mixing jet mill drill bit after horizontal well oblique, comprises PDC drill bit, it is characterized in that at the chip area eliminating PDC bit gauge protection position, and PDC drill bit internal installed additional turbulent flow negative pressure take out sand device, oblique after mixing jet mill device;
Described turbulent flow negative pressure is taken out sand device and is comprised shaft bottom landwaste stirring and washer jet, landwaste suction pipe; Shaft bottom landwaste stirs and is communicated with the sprue of PDC drill bit with the entrance of washer jet, and shaft bottom landwaste stirs and is connected with PDC drill bit end chip area with the outlet of washer jet; 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 communicated with the outside of negative pressure mixing chamber;
After described oblique, mixing jet mill device comprises reverse high-speed jet nozzle, negative pressure mixing chamber, trunnion, landwaste dissociate accelerating tube, pulverize target body, crushing bin, bypass, reverse high-speed jet nozzle and shaft bottom landwaste stir and oppositely arrange with washer jet, reverse high-speed jet nozzle entrance is communicated with the sprue of PDC drill bit, the outlet of reverse high-speed jet nozzle and the lower end UNICOM of negative pressure mixing chamber, upper end and the trunnion of negative pressure mixing chamber 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, pulverizing the dissociate axis of accelerating tube of the target surface of target body and landwaste is the angle of 0 °-90 °, crushing bin is communicated with bypass, bypass is into the large diffusivity pipe of young outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510234415.XA CN104806173A (en) | 2015-05-11 | 2015-05-11 | Oblique-crossing back mixing type jet mill drill bit of horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510234415.XA CN104806173A (en) | 2015-05-11 | 2015-05-11 | Oblique-crossing back mixing type jet mill drill bit of horizontal well |
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| Publication Number | Publication Date |
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| CN104806173A true CN104806173A (en) | 2015-07-29 |
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| CN201510234415.XA Pending CN104806173A (en) | 2015-05-11 | 2015-05-11 | Oblique-crossing back mixing type jet mill drill bit of horizontal well |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246114A (en) * | 2016-10-24 | 2016-12-21 | 中国石油大学(北京) | Mill drill pipe nipple in horizontal well pulse |
| CN106285482A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in self-excited oscillation 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 |
| CN106917588A (en) * | 2015-12-24 | 2017-07-04 | 大庆天瑞机械制造有限公司 | Split type backward jet polycrystalline diamond compact 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 |
| 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 |
| CN107401378A (en) * | 2017-09-20 | 2017-11-28 | 中国石油大学(北京) | Drill bit |
| CN107461163A (en) * | 2017-08-23 | 2017-12-12 | 中国石油大学(北京) | Interior chip removal pulsing jet is depressured drill string pipe nipple |
| CN109611030A (en) * | 2018-11-28 | 2019-04-12 | 中国石油大学(北京) | Chip space type variable flow jet flow drill |
| CN111350476A (en) * | 2020-05-09 | 2020-06-30 | 西南石油大学 | Jet flow crushing, sucking and recovering device suitable for natural gas hydrate exploitation |
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| US4185706A (en) * | 1978-11-17 | 1980-01-29 | Smith International, Inc. | Rock bit with cavitating jet nozzles |
| CN103628822A (en) * | 2013-12-09 | 2014-03-12 | 中国石油大学(北京) | Safe and efficient gas drilling jet flow abrasive drilling bit of horizontal well |
| CN103790521A (en) * | 2013-12-09 | 2014-05-14 | 中国石油大学(北京) | Safe and efficient mud drilling jet mill bit for horizontal wells |
| CN104373044A (en) * | 2014-11-03 | 2015-02-25 | 中国石油大学(北京) | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
| CN104405292A (en) * | 2014-11-03 | 2015-03-11 | 中国石油大学(北京) | Double-wall drill pipe countercirculation well drilling fixed guide impeller type rotational flow and jet flow pump drill bit |
| CN204663403U (en) * | 2015-05-11 | 2015-09-23 | 中国石油大学(北京) | Mixing jet mill drill bit after a kind of horizontal well oblique |
-
2015
- 2015-05-11 CN CN201510234415.XA patent/CN104806173A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4185706A (en) * | 1978-11-17 | 1980-01-29 | Smith International, Inc. | Rock bit with cavitating jet nozzles |
| CN103628822A (en) * | 2013-12-09 | 2014-03-12 | 中国石油大学(北京) | Safe and efficient gas drilling jet flow abrasive drilling bit of horizontal well |
| CN103790521A (en) * | 2013-12-09 | 2014-05-14 | 中国石油大学(北京) | Safe and efficient mud drilling jet mill bit for horizontal wells |
| CN104373044A (en) * | 2014-11-03 | 2015-02-25 | 中国石油大学(北京) | Tangential injection type whirl flow jet flow grinding drill bit for horizontal well |
| CN104405292A (en) * | 2014-11-03 | 2015-03-11 | 中国石油大学(北京) | Double-wall drill pipe countercirculation well drilling fixed guide impeller type rotational flow and jet flow pump drill bit |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917588A (en) * | 2015-12-24 | 2017-07-04 | 大庆天瑞机械制造有限公司 | Split type backward jet polycrystalline diamond compact bit |
| CN106285482A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in self-excited oscillation 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 |
| CN106246114A (en) * | 2016-10-24 | 2016-12-21 | 中国石油大学(北京) | Mill drill pipe nipple in horizontal well pulse |
| CN107386979B (en) * | 2017-08-23 | 2023-09-26 | 中国石油大学(北京) | Internal chip removal pulse jet flow depressurization 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 |
| 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 |
| CN107461163A (en) * | 2017-08-23 | 2017-12-12 | 中国石油大学(北京) | Interior chip removal pulsing jet is depressured drill string pipe nipple |
| CN107461163B (en) * | 2017-08-23 | 2023-10-20 | 中国石油大学(北京) | Inner chip removal pulse jet depressurization drill string nipple |
| CN107386987B (en) * | 2017-08-23 | 2023-09-26 | 中国石油大学(北京) | Internal chip removal jet flow pressure reducing drill bit |
| CN107401378A (en) * | 2017-09-20 | 2017-11-28 | 中国石油大学(北京) | Drill bit |
| CN107401378B (en) * | 2017-09-20 | 2023-10-27 | 中国石油大学(北京) | Drill bit |
| CN109611030B (en) * | 2018-11-28 | 2019-11-29 | 中国石油大学(北京) | Chip space type variable flow jet flow drill |
| CN109611030A (en) * | 2018-11-28 | 2019-04-12 | 中国石油大学(北京) | Chip space type variable flow jet flow drill |
| CN111350476A (en) * | 2020-05-09 | 2020-06-30 | 西南石油大学 | Jet flow crushing, sucking and recovering device suitable for natural gas hydrate exploitation |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Xuyue Inventor after: Gao Deli Inventor after: Guo Baiyun Inventor before: Gao Deli Inventor before: Chen Xuyue Inventor before: Guo Baiyun |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |