CN202991021U - Underground self-powered slurry signal generator - Google Patents
Underground self-powered slurry signal generator Download PDFInfo
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- CN202991021U CN202991021U CN 201320005929 CN201320005929U CN202991021U CN 202991021 U CN202991021 U CN 202991021U CN 201320005929 CN201320005929 CN 201320005929 CN 201320005929 U CN201320005929 U CN 201320005929U CN 202991021 U CN202991021 U CN 202991021U
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- signal generator
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Abstract
The utility model provides an underground self-powered slurry signal generator. The signal generator comprises an electricity generating device and a pulse signal generating device, wherein the whole electricity generating device is arranged along the axis direction; and the electricity generating device comprises a rotor (13), a rotor permanent magnet group (14), a magnetic shaft permanent magnet group (15), a magnetic shaft (12), a magnetic shoe (17), a cylindrical permanent magnet group (18) and a stator coil winding group (20), wherein the rotor permanent magnet group (14) is embedded into the internal surface of the rotor (13), the magnetic shaft permanent magnet group (15) is embedded into the external surface of the magnetic shaft (12), the rotor permanent magnet group (14), the rotor (13), the magnetic shaft permanent magnet group (15) and the magnetic shaft (12) are positioned in the middle of the slurry signal generator, the magnetic shoe (17) is in threaded connected with the lower end of the magnetic shaft (12), the cylindrical permanent magnet group (18) is embedded into the lower end face of the magnetic shoe, and the stator coil winding group (20) is positioned at the lower part of the cylindrical permanent magnet group (18).
Description
Technical field
The utility model belongs to the petroleum drilling engineering field, the device that relates to the self-powered outside transmission mud pulse signal of a kind of downhole drill, especially the measuring apparatus that need power is more and more, need in the increasing situation of the information content of transmission, efficiently to the underground signal generator of the mud-pressure-pulse telemetry system of aboveground transmission pulse signal.
Background technology
Measurement while drilling (MWD) and well logging during (LWD) technology are the key technologies in present deviated directional drilling, extended horizontal well, Multilateral Wells, multiwell drilling process.Mainly comprise with boring transmission technology: electrical conduction mode, electromagnetic wave mode, sound wave mode, drilling fluid pulse mode etc.Wherein only have electromagnetic wave and drilling liquid pressure pulse mode to be proved to be practicable technically and economically, when electromagnetic wave transmits on the stratum signal attenuation serious, be only suitable for relatively shallowly using in layer.The mode that the drilling fluid pulse mode produces according to its pulse is divided into three kinds of positive pulses, negative pulse, continuous pressure ripple, wherein the positive pulse mode simple in structure with its signal generator, produce signal stabilization, convenient maintenance becomes the most general mode of present use.This novel self-powered mud signal generator belongs to positive pulse wireless drilling signal transmission system.
Along with the increase of oil field development difficulty in world wide and the development of drilling technology, the drilling engineer needs more, and the formation information of horn of plenty instructs drilling well, along with increasing measuring apparatus adds in measurement while drilling, the instrument power consumption is also in continuous increase, and the powered battery mode has been not suitable with this trend.This novel self-powered signal generator does not need to carry in addition battery, just can adapt to the variation of instrument power consumption and the variation of drilling fluid flow velocity by the rotor of changing different model, can be for a long time in the down-hole continuous operation.
Along with the lifting of DHM-MWD instrument image data amount, require further to improve with the data transmission rate of boring transmission system.Although its signal generator of positive pulse mode is simple in structure, produce signal stabilization, message transmission rate is low, and its application is restricted.The present invention has taked brand-new groove coding techniques, has greatly improved the transfer rate of data.
The utility model content
The utility model purpose is to provide a kind of down-hole self-powered mud pulse generator (referred to as mud pulse generator or generator), and is excessive to solve the generator volume, is not suitable for the problem of using in drill collar limited space.Serve as the power supply of instrument and produce pulse signal in the wireless drilling measuring system, relying on following technical proposals to realize:
A kind of down-hole self-powered mud signal generator, described down-hole self-powered mud signal generator comprises: rotor machine and the pulse signal generation device that is positioned on described rotor machine; Described rotor machine integral body arranges along axis direction, and described rotor machine comprises: rotor 13, rotor permanent magnet group 14, magnetic axis set of permanent magnets 15, magnetic axis 12, magnetic boots 17, cylindrical permanent magnet group 18 and stator coil winding 20,
Rotor permanent magnet group 14 is embedded in the inner surface of rotor 13, magnetic axis set of permanent magnets 15 is embedded in the external surface of magnetic axis 12, rotor permanent magnet group 14, rotor 13, magnetic axis set of permanent magnets 15 and magnetic axis 12 are positioned at the centre position of mud signal generator, for described rotor machine and pulse signal generation device provide power;
Further, described pulse signal generation device comprises: swash plate 10, thrust bearing 8, plunger displacement pump 5, main valve body 7, center oil pipe 11, control coil 24, iron core 23, armature 22, steel ball 21, application valve body 16, piston 4, lifting arm 3, mushroom head 2 and restrictor ring 1;
Swash plate 10 is threaded in magnetic axis 12 upper ends, and thrust bearing 8 is fixed on described swash plate 10, promotes plunger displacement pump 5 work; Piston 4, lifting arm 3 and mushroom head 2 are threaded connection and are integrated, and are positioned at plunger displacement pump 5 tops; Described restrictor ring is positioned at the top of described mushroom head 2 and is positioned at the top of whole mud signal generator;
Described control valve assembly comprises application valve body 16, control coil 24, iron core 23, armature 22, pressing plate 19, steel ball 21 and wire 26, and described control valve assembly is converted to the current signal that changes the hydraulic pressure signal of variation; Described main valve assembly comprises main valve body 7 and back-moving spring 9, and described main valve assembly amplifies the little hydraulic pressure variable signal that the control valve assembly generates, control piston 4 motions.
Further, described self-powered mud signal generator is positioned at apart from the about drill collar of 20m of drill bit,
Wherein, described rotor permanent magnet group 14 and magnetic axis set of permanent magnets 15 include: six strip permanent magnets arranging separately, and wherein the N of three strip permanent magnets is extremely outside, and the S of other three strip permanent magnets is extremely outside.
Further, the rotor 13 of described rotor machine is six cylindrical permanent magnet groups 18 that are arranged in magnetic boots 17, the stator of described rotor machine is six stator coil windings 20 that are fixed on the base 25 of signal generator, stator and rotor arrange on same axis, and the radial air gap between the end face of the end face of described cylindrical permanent magnet group 18 and described stator coil winding 20 is 0.5mm～0.6mm.
Further, the stroke of described piston 4 is 8～10mm.
Further, described down-hole self-powered mud signal generator also comprises:
The groove encoder, the Signal coding mode of described groove encoder is taked the groove coded system, and the groove coding will be divided into several grooves a period of time, place some pulses in these grooves, and the permutation and combination relation of groove and pulse represents the corresponding signal data.
The beneficial effect of down-hole of the present utility model self-powered mud pulse generator is:
1, axial arranged rotor/stator generator has been conducive to reduce the diameter of device, is adapted at use in drill collar limited space;
2, the transmission due to moment between two pairs of set of permanent magnets does not need contact, so solved friction and sealing problem, simple in structure, not fragile, carry-over moment is reliable.
3, rotor machine and pulse signal generation device all rely on the rotation of magnetic axis 12 that power is provided, and these two kinds of devices are designed together, make little, the simple in structure characteristics of volume that the utlity model has compactly.
4, the coding principle of groove coding has determined that its antijamming capability is better than traditional binary coding.Make native system all be better than domestic existing measurement-while-drilling system aspect reliability and transfer rate.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the longitudinal plan on generator of the present utility model top;
Fig. 2 is the longitudinal plan of generator core of the present utility model;
Fig. 3 is the longitudinal plan of generator of the present utility model bottom.
Drawing reference numeral:
1. restrictor ring, 2. mushroom head, 3. lifting arm, 4. piston, 5. plunger displacement pump, 6. plunger, 7. main valve body, 8. thrust bearing, 9. back-moving spring, 10. swash plate, 11. the center oil pipe, 12. magnetic axises, 13. rotors, 14. rotor permanent magnet groups, 15. the magnetic axis set of permanent magnets, 16. application valve bodies, 17. magnetic boots, 18. cylindrical permanent magnet groups, 19. pressing plate, 20. stator coil windings, 21. steel balls, 22. armature, 23. iron core, 24. control coils, 25. bases (also claiming major part), 26 wires.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the longitudinal plan on generator of the present utility model top; Fig. 2 is the longitudinal plan of generator core of the present utility model; Fig. 3 is the longitudinal plan of generator of the present utility model bottom.In conjunction with consulting Fig. 1-Fig. 3, down-hole of the present utility model self-powered mud signal generator comprises: rotor machine and pulse signal generation device.
The axial arranged form of the whole employing of rotor machine, rotating part comprises one group of cylindrical permanent magnet 18, is arranged in along even circumferential on the lower surface of magnetic axis 12.Standing part comprises one group of stator coil winding 20, has magnetive cord 23 in the middle of these windings, and coil windings fixedly is evenly arranged along circumference, and with cylindrical permanent magnet group 18 end faces, certain radial clearance is arranged.When cylindrical permanent magnet group 18 is rotated with magnetic axis 12, stator coil winding 20 cutting magnetic lines, generation current is powered to detecting instrument.Axial arranged generator has reduced the diameter of device, is adapted at use in drill collar limited space.
The rotating part of rotor machine is that the rotation by magnetic axis 12 drives, and magnetic axis 12 is in the housing of mud signal generator, and in the middle of it, section surface evenly is equipped with six strip permanent magnets, and three N are extremely outside, and three S are extremely outside, alternate layout.The mud signal generator body outward with it opposite position rotor 13 is installed, rotor 13 inwalls also are inlaid with six strip permanent magnet groups, three N are extremely outside, three S are extremely outside, alternate layout.Rotor 13 peripheries have turbo blade, and High Rotation Speed under the drilling fluid of certain flow rate drives by the magnetic Field Coupling effect between rotor permanent magnet group 14 and magnetic axis set of permanent magnets 15, drives magnetic axis 12 High Rotation Speeds in housing, for rotor machine provides power.Because the transmission of moment between two pairs of set of permanent magnets does not need contact, so solved friction and sealing problem, simple in structure, not fragile, carry-over moment is reliable.
Pulse signal generation device comprises a restrictor ring 1, a mushroom head 2, mushroom head 2 is driven by lifting arm 3 by piston 4 and radially moves, this movement is used for changing the through flow cross section between mushroom head 2 and restrictor ring 1, thereby change the pressure by the drilling fluid of cross section, produce pressure pulse.The motion of piston 4 and mushroom head 2 is to be controlled by the Electromagnetic Control valve body 16 of bottom, opening and closure of the signal controlling electromagnetic type application valve body 16 that the bottom detecting instrument transmits, open or closure state thereby oil circuit in center oil pipe 11 is in, the spout hole on main valve body 7 is switched between open and close.When the main valve body spout hole was closed, in piston cavity, hydraulic oil was in high pressure conditions, and piston 4 moves upward under the effect of high fluid pressure, drove mushroom head 2 and moved upward, and produced a positive pulse signal.
Described magnetic axis 12, the end is fixed with swash plate 10, the rotation that rotarily drives swash plate 10 of magnetic axis 12, thus the plunger 6 that promotes a plunger displacement pump 5 do and pump, produce oil pressure, power is provided for the circulating oil path of pulse signal generation device.
Rotor machine and pulse signal generation device all rely on the rotation of magnetic axis 12 that power is provided, and these two kinds of devices are designed together, make little, the simple in structure characteristics of volume that the utlity model has compactly.
In order to improve the data transmission rate of instrument, invented the groove encoder, adopt the groove coded system that the various parameters that tester detects are compiled into pulse signal.The groove encoder is taked unique groove coded system, and the groove coding is divided into several grooves with each time period, places youngster's pulse in these grooves, and the permutation and combination relation of these grooves and pulse has just represented data, and concrete data corresponding relation represents with the groove coding schedule.The coding principle of groove coding has determined that its antijamming capability is better than traditional binary coding.Make native system all be better than domestic existing measurement-while-drilling system aspect reliability and transfer rate.
Below the self-powered mud signal generator of the utility model embodiment is described in further detail:
Consult Fig. 1 to Fig. 3, the self-powered mud signal generator of the utility model embodiment mainly is comprised of rotor machine and pulse signal generation device two parts again.This rotor machine comprises: rotor 13, rotor permanent magnet group 14, magnetic axis set of permanent magnets 15, magnetic axis 12, magnetic boots 17, cylindrical permanent magnet group 18 and stator coil winding 20.Pulse signal generation device comprises: magnetic axis 12, swash plate 10, thrust bearing 8, plunger displacement pump 5, plunger 6, back-moving spring 9, main valve body 7, center oil pipe 11, control coil 24, iron core 23, armature 22, pressing plate 19, steel ball 21, application valve body 16, piston 4, lifting arm 3, mushroom head 2 and restrictor ring 1.
High speed drilling fluid drive rotor 13 rotations that come from top to bottom in drilling rod, thereby rotor permanent magnet group 14 drives magnetic axis set of permanent magnets 15 rotations of signal generator inside by the magnetic Field Coupling effect, and then the magnetic boots 17, the swash plate 10 that drive magnetic axis 12 and magnetic axis 12 two ends rotate.Stud with cylindrical permanent magnet group 18 in magnetic boots 17 as generator amature, stator coil winding 20 cutting magnetic lines during rotation under its end face produce alternating current, power to detecting instrument.
Various engineering parameters and geologic parameter that the sensor of detecting instrument detects change electric impulse signal into through the groove encoder.The groove coded system has the self checking function, transfer rate is fast, the pulse generation number of times is few, the reliability high, has improved the efficient of transfer of data, has reduced the wearing and tearing of impulse generator, has extended the service time of impulse generator.
The rotation of swash plate 10 produces the plunger 6 of plunger displacement pump 5 and moves back and forth, and realizes the work of pump.Mushroom head 2 is driven by piston 4, the motion of piston 4 is controlled by application valve body 16, when application valve body 16 during according to the oil circuit of electric impulse signal closing center oil pipe, the back-moving spring 9 of main valve body 7 promotes the spout hole that spool is closed main valve body 7, in piston cavity, hydraulic fluid pressure raises, pushing piston 4 and mushroom head 2 move upward, and produce positive pulse, realize the transmission of pulse signal.
With reference to Fig. 2 and rotor machine shown in Figure 3, from drilling rod from top to bottom the swiftly flowing drilling fluid rotor 13 that drives the signal generator outside rotate, thereby make rotor permanent magnet group 14 rotations that are arranged on rotor 13.This rotor permanent magnet group 14 comprises six strip permanent magnets, evenly distributes around rotor 13 center bore inner walls.The N of three magnets wherein is extremely outside, and other three magnet S are extremely outside, alternate layout.Six strip permanent magnets that along the circumferential direction also evenly distribute on the outer wall of the inner magnetic axis 12 of signal generator, namely the magnetic axis set of permanent magnets 15, and its arrangement is identical with rotor permanent magnet group 14 arrangements.Under the effect of magnetic Field Coupling, the rotor permanent magnet group 14 of rotation drives 15 rotations of magnetic axis set of permanent magnets, and then makes magnetic axis 12--＞magnetic boots 17--＞cylindrical permanent magnet group 18 rotate the generation rotating excitation field.(base 25 is the bearing of signal generator to be fixedly mounted on base 25, rise to support and connection function) on six stator coil windings 20 as the stator of generator, the magnetic line of force of cutting rotating excitation field, produce alternating current, drawn by wire 26, give the detection instruments such as inserting tube that are connected to its underpart power supply.
Alternating current is given circuit and the sensor power supply of each detection instrument of down-hole through over commutation and voltage stabilizing.The geologic parameters such as the engineering parameter such as the hole deviation that sensor detects, orientation tool-face and resistivity, GR are converted into electric impulse signal through the groove encoder of independent research with signal.The groove encoder is taked unique groove coded system, and the groove coding will be divided into several grooves a period of time, places youngster's pulse in these grooves, and the permutation and combination relation of these grooves and pulse has just represented data, and concrete data corresponding relation represents with the groove coding schedule.The groove coded system has that transfer rate is fast, self checking function, pulse generation number of times are few, the reliability high, has improved the efficient of transfer of data, has reduced the wearing and tearing of impulse generator, has extended the service time of impulse generator.
With reference to Fig. 2, be full of aircraft engine oil in mud signal generator cavity.The working method of pulse signal generation device is as follows:
When the signal that transmits by wire 26 when detecting instruments such as inserting tubes was low level, application valve body 16 was in conducting state.As previously mentioned, the mud rotor driven set of permanent magnets 14--that flows＞magnetic axis set of permanent magnets 15--＞magnetic axis 12 rotations, and move reciprocatingly by the plunger 6 that the rotation that is fixed on the swash plate 10 on magnetic axis 12 promotes plunger displacement pump 5, generation has the hydraulic oil of certain pressure, and hydraulic oil is by the oil circuit cocurrent flow at plunger displacement pump 5 centers.A part is through the same cavity of overflow orifice flow on main valve body 7.A part is by damping hole--＞center oil pipe 11--＞application valve body 16 cocurrent flow cavitys at main valve body 7 centers.
When the signal that transmits when wire 26 is high level, control coil 24 chargings, iron core 23 attracts armature 22 to pull pressing plate 19 to compress steel balls 21, makes the oil circuit of center oil pipe 11 closed.Main valve body 7 spools move under back-moving spring 9 effects, and the spout hole of main valve body 7 is blocked.Hydraulic fluid pressure pushing piston 4 rises, and rises thereby lifting arm 3 drives mushroom head 2.Drilling liquid pressure in reducing by area between mushroom head 2 and restrictor ring 1, drilling rod raises, and this pressure pulse is passed to ground by drilling fluid, and pressure sensor is converted to the signal of telecommunication with this pressure variation, sends ground instrument to.Through the processing of hardware and software, eliminate noise and decoding, be reduced to required digital information.
Above embodiment only in order to the technical scheme of the utility model embodiment to be described, is not intended to limit; Although with reference to previous embodiment, the utility model embodiment is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model embodiment.
Claims (6)
1. a down-hole self-powered mud signal generator, is characterized in that, described down-hole self-powered mud signal generator comprises: rotor machine and the pulse signal generation device that is positioned on described rotor machine; Described rotor machine integral body is arranged along axis direction, described rotor machine comprises: rotor (13), rotor permanent magnet group (14), magnetic axis set of permanent magnets (15), magnetic axis (12), magnetic boots (17), cylindrical permanent magnet group (18) and stator coil winding (20)
Rotor permanent magnet group (14) is embedded in the inner surface of rotor (13), magnetic axis set of permanent magnets (15) is embedded in the external surface of magnetic axis (12), rotor permanent magnet group (14), rotor (13), magnetic axis set of permanent magnets (15) and magnetic axis (12) are positioned at the centre position of mud signal generator, for described rotor machine and pulse signal generation device provide power;
Magnetic boots (17) are threaded in magnetic axis (12) lower end, and cylindrical permanent magnet group (18) is embedded in the lower surface of magnetic boots, and stator coil winding (20) is positioned at the bottom of described cylindrical permanent magnet group (18).
2. down-hole according to claim 1 self-powered mud signal generator, tool be characterised in that,
Described pulse signal generation device comprises: swash plate (10), thrust bearing (8), plunger displacement pump (5), main valve body (7), center oil pipe (11), control coil (24), iron core (23), armature (22), steel ball (21), application valve body (16), piston (4), lifting arm (3), mushroom head (2) and restrictor ring (1);
Swash plate (10) is threaded in magnetic axis (12) upper end, and thrust bearing (8) is fixed on described swash plate (10), promotes plunger displacement pump (5) work; Piston (4), lifting arm (3) and mushroom head (2) are threaded connection and are integrated, and are positioned at plunger displacement pump (5) top; Described restrictor ring is positioned at the top of described mushroom head (2) and is positioned at the top of whole mud signal generator;
Magnetic axis (12) is hollow, has centre bore, described center oil pipe (11) is arranged in the centre bore of magnetic axis (12), and described center oil pipe (11) lower end is connected with the application valve body assembly, and described center oil pipe (11) upper end is connected with the main valve assembly;
Described control valve assembly comprises application valve body (16), control coil (24), iron core (23), armature (22), pressing plate (19), steel ball (21) and wire (26), and described control valve assembly is converted to the current signal that changes the hydraulic pressure signal of variation; Described main valve assembly comprises main valve body (7) and back-moving spring (9), and described main valve assembly amplifies the little hydraulic pressure variable signal that the control valve assembly generates, control piston (4) motion.
3. down-hole according to claim 2 self-powered mud signal generator, is characterized in that,
Described self-powered mud signal generator is positioned at apart from the about drill collar of 20m of drill bit,
Wherein, described rotor permanent magnet group (14) and magnetic axis set of permanent magnets (15) include: six strip permanent magnets arranging separately, and wherein the N of three strip permanent magnets is extremely outside, and the S of other three strip permanent magnets is extremely outside.
4. down-hole according to claim 2 self-powered mud signal generator, it is characterized in that, the rotor of described rotor machine (13) is six cylindrical permanent magnet groups (18) that are arranged in magnetic boots (17), the stator of described rotor machine is for being fixed on six the stator coil windings (20) on base (25), stator and rotor arrange on same axis, and the radial air gap between the end face of the end face of described cylindrical permanent magnet group (18) and described stator coil winding (20) is 0.5mm～0.6mm.
5. down-hole according to claim 2 self-powered mud signal generator, is characterized in that, the stroke of described piston (4) is 8～10mm.
6. down-hole according to claim 2 self-powered mud signal generator, is characterized in that, described down-hole self-powered mud signal generator also comprises:
The groove encoder, the Signal coding mode of described groove encoder is taked the groove coded system, and the groove coding will be divided into several grooves a period of time, place some pulses in these grooves, and the permutation and combination relation of groove and pulse represents the corresponding signal data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005929 CN202991021U (en) | 2013-01-07 | 2013-01-07 | Underground self-powered slurry signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005929 CN202991021U (en) | 2013-01-07 | 2013-01-07 | Underground self-powered slurry signal generator |
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| Publication Number | Publication Date |
|---|---|
| CN202991021U true CN202991021U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320005929 Expired - Lifetime CN202991021U (en) | 2013-01-07 | 2013-01-07 | Underground self-powered slurry signal generator |
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| Country | Link |
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| CN (1) | CN202991021U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925183A (en) * | 2014-04-22 | 2014-07-16 | 北京嘉禾汇拓石油技术有限公司 | Axial plunger pump for mud pulse generator |
| CN108286428A (en) * | 2018-01-08 | 2018-07-17 | 东营植诚机电技术开发有限公司 | A kind of minor diameter metallic piston formula pulse generating unit |
-
2013
- 2013-01-07 CN CN 201320005929 patent/CN202991021U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925183A (en) * | 2014-04-22 | 2014-07-16 | 北京嘉禾汇拓石油技术有限公司 | Axial plunger pump for mud pulse generator |
| CN108286428A (en) * | 2018-01-08 | 2018-07-17 | 东营植诚机电技术开发有限公司 | A kind of minor diameter metallic piston formula pulse generating unit |
| CN108286428B (en) * | 2018-01-08 | 2021-09-10 | 东营植诚机电技术开发有限公司 | Small-diameter metal piston type pulse generating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Gao Zengxin Inventor before: distance Inventor before: Gong Xianfeng Inventor before: Gao Zengxin |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: 100085 Beijing Road, building No. 8, building 3-2, No. 3, Haidian District Patentee after: BEIJING HTWB PETROLEUM TECHNOLOGY CO.,LTD. Address before: 100085 Beijing city Haidian District Qunying Science Park Building No. 3 West 1 Patentee before: BEIJING HENGTAI WANBO PETROLEUM TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |