CN102966305A - Near-bit circumferential resonance impacter - Google Patents
Near-bit circumferential resonance impacter Download PDFInfo
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- CN102966305A CN102966305A CN2012105436751A CN201210543675A CN102966305A CN 102966305 A CN102966305 A CN 102966305A CN 2012105436751 A CN2012105436751 A CN 2012105436751A CN 201210543675 A CN201210543675 A CN 201210543675A CN 102966305 A CN102966305 A CN 102966305A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000007858 starting material Substances 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims description 20
- 238000004080 punching Methods 0.000 claims description 18
- 210000002784 stomach Anatomy 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 238000005755 formation reaction Methods 0.000 claims 2
- 238000005553 drilling Methods 0.000 abstract description 14
- 239000011435 rock Substances 0.000 abstract description 8
- 230000003116 impacting effect Effects 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 5
- 206010060904 Freezing phenomenon Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000009514 concussion Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 102000016938 Catalase Human genes 0.000 description 1
- 108010053835 Catalase Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
The invention relates to a near-bit circumferential resonance impacter. The near-bit circumferential resonance impacter comprises a housing pup joint, a guide part, the resonance impacter and a transmission pup joint, wherein the lower part of the housing pup joint is connected with the transmission pup joint; the guide part and the resonance impacter are mounted between the housing pup joint and the transmission pup joint; the guide part comprises a T-shaped inner lining pipe and a V-shaped outer sleeve pipe; the T-shaped inner lining pipe is arranged on the V-shaped outer sleeve pipe; a distribution hole is formed in the upper end of the V-shaped outer sleeve pipe; the lower end port of the V-shaped outer sleeve pipe is communicated with an inlet of the resonance impacter; an outlet of the resonance impacter is communicated with the transmission pup joint; the resonance impacter is provided with a hydraulic hammer; a hammer anvil on the outer surface of the hydraulic hammer is positioned in an impacting groove of a hammer housing; an impacting flow channel comprises the impacting groove; a positioning key on the inner surface of the hydraulic hammer extends into a positioning groove of a starter; and a pressure relief flow channel comprises the positioning groove. According to the near-bit circumferential resonance impacter, the stick slip phenomenon and the intermittent tool jamming phenomenon of a drill bit can be eliminated, the drill bit is guaranteed to stably break a rock, and the mechanical drilling speed is increased.
Description
One, technical field:
What the present invention relates to is the drilling tool that the broken rock technology field of oil drilling is used, and what be specifically related to is the circumferential resonance impactor of a kind of nearly drill bit.
Two, background technology:
Along with deepening continuously of oil-gas exploration, difficulties in exploration increases day by day, well depth from middle-shallow layer to deep layer, super deep layer extends, broken rock difficulty strengthens.Drill bit can produce stick-slip effect, intermittent bit freezing phenomenon at the deep formation rock break-off process.The generation of this phenomenon is the overlong time of gathering amount of torsional energy because of drill teeth when breaking rock.This phenomenon makes nearly drill bit drill string periodically accumulate the moment of torsion of certain value, and after catalase under the drill teeth, drill string intort energy discharges fast, so repeatedly.This phenomenon produces drill string and reverses concussion, makes the drill bit rock break-off process extremely unstable, causes drill bit to destroy, and reduces bit life, improves drilling cost.
In than hard formation, hard formation and abrasive layer, in order to improve the rate of penetration of drill bit, often use spinning or rushing turning and drilling tool of various small frequency large amplitudes, large impact power, such as patent CN200710056325.1 a kind of jet flow type shocker has been described.Although this class instrument can improve rate of penetration, can not solve drill bit stick-slip effect, intermittent bit freezing phenomenon, and can further aggravate the unstability of bit performance, even can strengthen the stick-slip effect of drill bit, shorten bit life.
For problems such as the stick-slip effect that solves drill bit, intermittent bit freezings, increase the stability of drill bit work, prolong the use application life of drill bit, patent US6742609B2 has designed the turbo-driven reverse impactor of a kind of drilling fluid, patent 200910058083.9 has designed the torsional impact drilling tool that a kind of drilling fluid helicoid hydraulic motor drives, but these two kinds of drilling tool complex structures, easily worn part is many and press consumption larger, and be restricted application life.
Three, summary of the invention:
The purpose of this invention is to provide the circumferential resonance impactor of a kind of nearly drill bit, it is used for solving stick-slip effect, the intermittent bit freezing problem of drill bit of the prior art drill bit firmly to hard formation or the broken rock of abrasive layer the time.
The technical solution adopted for the present invention to solve the technical problems is: the circumferential resonance impactor of this nearly drill bit comprises shell short circuit, diversion component, resonance impactor, transmission short circuit, the bottom of shell short circuit is connected with the transmission short circuit, and diversion component, resonance impactor are installed between shell short circuit and the transmission short circuit; Diversion component is made of T shape internal lining pipe and V-arrangement outer tube, and T shape internal lining pipe is sitting on the V-arrangement outer tube, and there is tap hole the upper end of V-arrangement outer tube, and the lower port of V-arrangement outer tube communicates with resonance impactor entrance; The outlet of resonance impactor communicates with the transmission short circuit, the resonance impactor has Hydro-efflux Hammer, and the hammer anvil of Hydro-efflux Hammer external surface is positioned at the punching groove of hammer shell, impacts runner and comprises punching groove, the positioning key of Hydro-efflux Hammer inner surface extend in the locating slot of starter, and the pressure release runner comprises locating slot.
The resonance impactor is comprised of gland, hammer shell, Hydro-efflux Hammer, seal retainer ring, starter, interior current divider, variable-flow nozzle, support ring and axle sleeve in the such scheme; Gland is on the hammer shell, the inner fluid power impulse chamber that forms after the two connects, the fluid power impulse chamber is equipped with Hydro-efflux Hammer, starter, interior current divider, variable-flow nozzle, starter is placed between interior current divider and the Hydro-efflux Hammer, the variable-flow nozzle is installed in the current divider exit, and support ring is enclosed within interior current divider lower end; The hammer outer casing inner wall has axial symmetry punching groove, stomach wall half slot and pressure hole; The Hydro-efflux Hammer external surface has axisymmetric hammer anvil, and inner surface has axisymmetric positioning key, at hammer anvil and positioning key both sides hammer anvil hole and location keyhole is arranged; The starter external surface has axial symmetry protuberance and locating slot, at protuberance the axial symmetry transitional pore is arranged, and flowing hole is arranged at the starter bottom; Interior current divider is made of relief hole and base, and its base is connected to the hammer outer casing bottom; The pressure release runner is communicated successively by pressure hole, locating slot, location keyhole, stomach wall half slot and consists of, and the stomach wall half slot communicates with the resonator outlet; The impact runner is communicated successively by relief hole, hammer anvil hole, punching groove and consists of, and punching groove communicates with flowing hole through the hammer anvil hole, and flowing hole communicates with the resonator outlet.
Between resonance impactor, the transmission short circuit location snap ring is set in the such scheme, is used for location diversion component, resonance impactor and transmission short circuit in the position of shell short circuit.
Such scheme housing short circuit upper end pin thread is connected with top drill collar box end by the API standard thread.
Transmission short circuit lower end is connected with the drill bit pin end by the API standard thread in the such scheme.
Beneficial effect:
1, the circumferential impact of the present invention's stable large frequency of periodic little amplitude that can produce, this impulsive torque can be eliminated stick-slip phenomenon and the intermittent bit freezing phenomenon of drill bit, guarantees the stable broken rock of drill bit, improves rate of penetration.
2, physical dimension of the present invention is short, in the drilling technology applicable to various liquid phase drilling fluids, and can be applied in inclination section, steady tilted section, the drop angle section of directional well.
3, the present invention does not have electronic unit, and size is less, and its course of work does not produce interference to MWD, LWD etc. with boring Electrical Measuring Instrument.Because the use of this instrument has guaranteed stablizing and balance of drill string internal torque, has reduced drill string and has reversed concussion, is conducive to MWD, LWD etc. with the steady operation that bores Electrical Measuring Instrument.
4, the present invention is complete hydraulic machine structure, and easily worn part is few, working stability, and long service life is conducive to reduce drilling cost.
Four, description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view among Fig. 1;
Fig. 3 is the B-B sectional view among Fig. 1;
Fig. 4 is the C-C sectional view among Fig. 1.
1-shell pipe nipple; 2-T shape internal lining pipe; 3-V shape outer tube; The 4-gland; The 5-axle collar; The 6-Hydro-efflux Hammer; The 7-starter; The 8-axle sleeve; The 9-support ring; 10-locates snap ring; 11-transmission short circuit; The 12-seal retainer ring; Current divider in the 13-; 14-variable-flow nozzle; 15-hammers shell into shape; The 16-tap hole; The 17-flowing hole; 18-locates keyhole; The 19-positioning key; 20-stomach wall half slot; The 21-locating slot; The 22-pressure hole; The 23-protuberance; The 24-transitional pore; The 25-hammer anvil; 26-hammer anvil hole; The 27-relief hole; The 28-punching groove.
Five, the specific embodiment:
The present invention is described further below in conjunction with accompanying drawing:
As shown in Figure 1, the circumferential resonance impactor of this nearly drill bit comprises shell short circuit 1, diversion component, resonance impactor, transmission short circuit 11, shell short circuit 1 upper end pin thread is connected with top drill collar box end by the API standard thread, the lower end of shell short circuit 1 links to each other with location snap ring 10, transmission short circuit 11 gaps, diversion component, resonance impactor are installed between shell short circuit 1 and the transmission short circuit 11, shell short circuit 1 outside, diversion component, resonance impactor are interior.
In conjunction with shown in Figure 2, diversion component is made of T shape internal lining pipe 2 and V-arrangement outer tube 3, and the outward flange of T shape internal lining pipe 2 is sitting on V-arrangement outer tube 3 upper port, and there is tap hole 16 upper end of V-arrangement outer tube 3, and the lower port of V-arrangement outer tube 3 communicates with resonance impactor entrance; The outlet of resonance impactor communicates with transmission short circuit 11.Transmission short circuit 11 lower ends are connected with the drill bit pin end by the API standard thread.Location snap ring 10 is set between resonance impactor, the transmission short circuit 11, is used for location diversion component, resonance impactor and transmission short circuit 11 in the position of shell short circuit 1.T shape internal lining pipe 2 extend in the V-arrangement outer tube 3, the outlet of T shape internal lining pipe 2 is had living space apart from the V-arrangement bottom of V-arrangement outer tube 3, this spatial class exports with V-arrangement outer tube 3 respectively like a threeway, T shape internal lining pipe 2, V-arrangement outer tube 3 communicates with annular space between T shape internal lining pipe 2 outer walls, tap hole 16 is arranged on the annular space place between V-arrangement outer tube 3 and T shape internal lining pipe 2 outer walls, the outer wall guided drilling liquid of T shape internal lining pipe 2 flows to the tap hole 16 of V-arrangement outer tube 3 upper ends, the fluid that tap hole 16 distributes enters into resonance impactor inside by the pressure hole 22 of resonance impactor hammer shell 15, and T shape internal lining pipe 2 inwalls are that interior current divider 13 is carried drilling fluids.
In conjunction with Fig. 3, shown in Figure 4, the resonance impactor is comprised of gland 4, hammer shell 15, Hydro-efflux Hammer 6, seal retainer ring 12, starter 7, interior current divider 13, variable-flow nozzle 14, support ring 9 and axle sleeve 8; Gland 4 is on hammer shell 15, the inner fluid power impulse chamber that forms after the two connects, the fluid power impulse chamber is equipped with Hydro-efflux Hammer 6, starter 7, interior current divider 13, variable-flow nozzle 14, starter 7 overlaps between interior current divider 13 and Hydro-efflux Hammer 6, variable-flow nozzle 14 is installed in the resonator exit, support ring 9 is enclosed within interior current divider 13 lower ends, axle sleeve 8, seal retainer ring 12 and the support ring 9 of Hydro-efflux Hammer 6 on hammer shell 15 done cyclic movement, and starter 7 is done cyclic movement at seal retainer ring 12,9 of support rings; The Hydro-efflux Hammer 6 upper and lower axle collars are installed on the hammer shell 15; Support ring is installed on the interior current divider 13 up and down, and supports starter 7.Hammer shell 15 inwalls have axial symmetry punching groove 28, stomach wall half slot 20 and pressure hole 22; Hydro-efflux Hammer 6 external surfaces have axisymmetric hammer anvil 25, and inner surface has axisymmetric positioning key 19, at hammer anvil 25 and positioning key 19 both sides hammer anvil hole 26 and location keyhole 18 are arranged; Starter 7 external surfaces have axial symmetry protuberance 23 and locating slot 21, at protuberance 23 axial symmetry transitional pore 24 are arranged, and flowing hole 17 is arranged at starter 7 bottoms; Interior current divider 13 is made of relief hole 27 and base, and its base is connected to hammer shell 15 bottoms; The pressure release runner is communicated successively and is consisted of by pressure hole 22, locating slot 21, location keyhole 18, stomach wall half slot 20, and stomach wall half slot 20 communicates with the resonator outlet; The impact runner is communicated successively by relief hole 27, hammer anvil hole 26, punching groove 28 and consists of, and punching groove 28 communicates with flowing hole 17 through hammer anvil hole 26, and flowing hole 17 communicates with the resonator outlet.
During resonance impactor of the present invention work, the drill collar cover of driver pipe nipple 1 of rotation rotates, and shell short circuit 1 drives and transmits short circuit 11, and transmission short circuit 11 is connected with drill bit and drives bit; The inlet opening of fluid shell short circuit 1 enters into T shape internal lining pipe 2, and shunting in V-arrangement outer tube 3, core flow enters interior current divider 13 by hammer shell 15, part upward fluid has tap hole 16 to flow to V-arrangement outer tube 3 and hammer gland 4 forms the space, begun through interior current divider 13 to the resonator exit portion by diversion component, internal flow can be divided into three parts: a part of fluid enter interior current divider 13 by hammer shell 15 and from the variable-flow nozzle out, directly arrive resonator and export; A part fluid through the tap hole 16 of V-arrangement outer tube 3 flow through the hammer shell 15 pressure hole 22 enter in the locating slot 21, and from the location keyhole 18 flow out to the stomach wall half slot 20, finally come the resonator outlet, the flow through transitional pore 24 of protuberance 23 of starter 7 of the relief hole 27 of last part fluid in interior current divider 13 enters hammer anvil hole 26, finally enter into punching groove 28, and finally enter into flowing hole 17 from punching groove 28 by hammer anvil hole 26, this part fluid and front two parts fluid converge in the resonator outlet, transmit short circuit 11 so fluid enters into, enter the annular space space through bit nozzle again; Under the acting in conjunction of second portion and third part fluid, hammer anvil 25 repeatedly moves in punching groove 28 and impacts punching groove 28, produces circumferential resonance and impacts, and pass to drill bit by transmission short circuit 11.
Below only be to realize an embodiment of the invention, based on other form of structure of this inventive principle within the scope of the present invention.
Claims (5)
1. circumferential resonance impactor of nearly drill bit, it is characterized in that: the circumferential resonance impactor of this nearly drill bit comprises shell short circuit (1), diversion component, resonance impactor, transmission short circuit (11), the bottom of shell short circuit (1) is connected with transmission short circuit (11), between shell short circuit (1) and the transmission short circuit (11) diversion component, resonance impactor is installed; Diversion component is made of T shape internal lining pipe (2) and V-arrangement outer tube (3), T shape internal lining pipe (2) is sitting on the V-arrangement outer tube (3), there is tap hole (16) upper end of V-arrangement outer tube (3), and the lower port of V-arrangement outer tube (3) communicates with resonance impactor entrance; The outlet of resonance impactor communicates with transmission short circuit (11), the resonance impactor has Hydro-efflux Hammer (6), the hammer anvil (25) of Hydro-efflux Hammer (6) external surface is positioned at the punching groove (28) of hammer shell (15), impact runner and comprise punching groove (28), the positioning key (19) of Hydro-efflux Hammer (6) inner surface extend in the locating slot (21) of starter (7), and the pressure release runner comprises locating slot (21).
2. the circumferential resonance impactor of nearly drill bit according to claim 1 is characterized in that: described resonance impactor is comprised of gland (4), hammer shell (15), Hydro-efflux Hammer (6), seal retainer ring (12), starter (7), interior current divider (13), variable-flow nozzle (14), support ring (9) and axle sleeve (8); Gland (4) is on hammer shell (15), the inner fluid power impulse chamber that forms after the two connects, the fluid power impulse chamber is equipped with Hydro-efflux Hammer (6), starter (7), interior current divider (13), variable-flow nozzle (14), starter (7) is placed between interior current divider (13) and the Hydro-efflux Hammer (6), variable-flow nozzle (14) is installed in interior current divider (13) exit, and support ring (9) is enclosed within interior current divider (13) lower end; Hammer shell (15) inwall has axial symmetry punching groove (28), stomach wall half slot (20) and pressure hole (22); Hydro-efflux Hammer (6) external surface has axisymmetric hammer anvil (25), and inner surface has axisymmetric positioning key (19), at hammer anvil (25) and positioning key (19) both sides hammer anvil hole (26) and location keyhole (18) is arranged; Starter (7) external surface has axial symmetry protuberance (23) and locating slot (21), at protuberance (23) axial symmetry transitional pore (24) is arranged, and flowing hole (17) is arranged at starter (7) bottom; Interior current divider (13) is made of relief hole (27) and base, and its base is connected to hammer shell (15) bottom; The pressure release runner is by pressure hole (22), locating slot (21), location keyhole (18), stomach wall half slot (20) formations that communicate successively, and stomach wall half slot (20) exports with resonator and communicates; Impact runner by relief hole (27), hammer anvil hole (26), punching groove (28) formations that communicate successively, punching groove (28) communicates with flowing hole (17) through the hammer anvil hole, and flowing hole (17) exports with resonator and communicates.
3. the circumferential resonance impactor of nearly drill bit according to claim 2 is characterized in that: location snap ring (10) is set between described resonance impactor, the transmission short circuit (11).
4. the circumferential resonance impactor of nearly drill bit according to claim 1 is characterized in that: described shell short circuit (1) upper end pin thread is connected with top drill collar box end by the API standard thread.
5. the circumferential resonance impactor of nearly drill bit according to claim 1, it is characterized in that: described transmission short circuit (11) lower end is connected with the drill bit pin end by the API standard thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210543675.1A CN102966305B (en) | 2012-12-11 | 2012-12-11 | Near-bit circumferential resonance impacter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210543675.1A CN102966305B (en) | 2012-12-11 | 2012-12-11 | Near-bit circumferential resonance impacter |
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| CN102966305A true CN102966305A (en) | 2013-03-13 |
| CN102966305B CN102966305B (en) | 2014-12-31 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628815A (en) * | 2013-11-20 | 2014-03-12 | 中国石油集团渤海钻探工程有限公司 | Near-bit torsion and oscillation coupling impactor |
| CN103628819A (en) * | 2013-11-20 | 2014-03-12 | 中国石油集团渤海钻探工程有限公司 | Near-bit torsion impactor |
| CN103821452A (en) * | 2014-03-11 | 2014-05-28 | 东北石油大学 | High-frequency low-amplitude axial impacter |
| CN104563859A (en) * | 2013-10-13 | 2015-04-29 | 成都恩承油气有限公司 | Hydro-hammer |
| CN104989307A (en) * | 2015-07-17 | 2015-10-21 | 东北石油大学 | Hydraulic oscillation circumferential impactor |
| CN105298381A (en) * | 2015-10-19 | 2016-02-03 | 西南石油大学 | Downhole motor realizing efficient rock breaking by composite vibration impacts |
| CN105804655A (en) * | 2016-05-12 | 2016-07-27 | 万晓跃 | Rotary valve reversing type liquid power peripheral impacting device realization method and structure |
| CN113565432A (en) * | 2021-09-05 | 2021-10-29 | 东北石油大学 | Jet-type impactor |
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| JPH09324592A (en) * | 1996-06-04 | 1997-12-16 | Yuji Kaneko | Boring device with hammer |
| WO2010043757A1 (en) * | 2008-10-13 | 2010-04-22 | Oy Atlas Copco Rotex Ab | Method and drilling apparatus for down-the-hole drilling |
| CN102454364A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工集团公司 | Torsional impact drilling tool |
| EP2518255A1 (en) * | 2009-12-22 | 2012-10-31 | IN, Suk Sin | Air hammer for a boring machine |
| CN203050499U (en) * | 2012-12-11 | 2013-07-10 | 李玮 | Near-bit peripheral resonance impactor |
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2012
- 2012-12-11 CN CN201210543675.1A patent/CN102966305B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09324592A (en) * | 1996-06-04 | 1997-12-16 | Yuji Kaneko | Boring device with hammer |
| WO2010043757A1 (en) * | 2008-10-13 | 2010-04-22 | Oy Atlas Copco Rotex Ab | Method and drilling apparatus for down-the-hole drilling |
| EP2518255A1 (en) * | 2009-12-22 | 2012-10-31 | IN, Suk Sin | Air hammer for a boring machine |
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| CN203050499U (en) * | 2012-12-11 | 2013-07-10 | 李玮 | Near-bit peripheral resonance impactor |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563859A (en) * | 2013-10-13 | 2015-04-29 | 成都恩承油气有限公司 | Hydro-hammer |
| CN103628815A (en) * | 2013-11-20 | 2014-03-12 | 中国石油集团渤海钻探工程有限公司 | Near-bit torsion and oscillation coupling impactor |
| CN103628819A (en) * | 2013-11-20 | 2014-03-12 | 中国石油集团渤海钻探工程有限公司 | Near-bit torsion impactor |
| CN103628815B (en) * | 2013-11-20 | 2016-03-30 | 中国石油集团渤海钻探工程有限公司 | A kind of nearly drill bit reverses, Oscillatory Coupling impactor |
| CN103628819B (en) * | 2013-11-20 | 2016-04-20 | 中国石油集团渤海钻探工程有限公司 | A kind of nearly drill bit reverse impactor |
| CN103821452A (en) * | 2014-03-11 | 2014-05-28 | 东北石油大学 | High-frequency low-amplitude axial impacter |
| CN103821452B (en) * | 2014-03-11 | 2016-01-20 | 东北石油大学 | A kind of frequency low-amplitude axial impact device |
| CN104989307A (en) * | 2015-07-17 | 2015-10-21 | 东北石油大学 | Hydraulic oscillation circumferential impactor |
| CN105298381A (en) * | 2015-10-19 | 2016-02-03 | 西南石油大学 | Downhole motor realizing efficient rock breaking by composite vibration impacts |
| CN105804655A (en) * | 2016-05-12 | 2016-07-27 | 万晓跃 | Rotary valve reversing type liquid power peripheral impacting device realization method and structure |
| CN105804655B (en) * | 2016-05-12 | 2018-11-16 | 万晓跃 | A kind of rotary valve commutation type hydrodynamic circumferential direction impactor implementation method and structure |
| CN113565432A (en) * | 2021-09-05 | 2021-10-29 | 东北石油大学 | Jet-type impactor |
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| CN102966305B (en) | 2014-12-31 |
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Effective date of registration: 20180423 Address after: 163319 new industrial incubator 1, 705, torch new street, Daqing high tech Zone, Heilongjiang, China, 705 Patentee after: Daqing East oil run Petroleum Technology Co.,Ltd. Address before: 163319 Daqing high tech Development Zone, Heilongjiang Province Road No. 199 Co-patentee before: Li Wei Patentee before: Yan Tie |
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Granted publication date: 20141231 |