CN104500052A - Compensation density logging-while-drilling instrument - Google Patents
Compensation density logging-while-drilling instrument Download PDFInfo
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- CN104500052A CN104500052A CN201410708543.9A CN201410708543A CN104500052A CN 104500052 A CN104500052 A CN 104500052A CN 201410708543 A CN201410708543 A CN 201410708543A CN 104500052 A CN104500052 A CN 104500052A
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- bearing cylinder
- pressure
- electronics
- detector
- logging
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a compensation density logging-while-drilling instrument. The compensation density logging-while-drilling instrument comprises a drill collar, as well as a mud flow guiding sleeve, an electronic gauge pressure-bearing barrel, a detector pressure-bearing barrel and a logging source which are sequentially arranged inside the drill collar, wherein at least one water hole is formed in the drill collar; the mud flow guiding sleeve is fixedly arranged inside the front end of the drill collar; a through hole communicated with the water hole is formed in a fixed end of the mud flow guiding sleeve; the electronic gauge pressure-bearing barrel and the detector pressure-bearing barrel are arranged inside a U-shaped slot in the side surface of the drill collar; a signal processing circuit and a power supply circuit are mounted inside the electronic gauge pressure-bearing barrel; an electronic instrument connector connected with an upper computer is arranged at one end of the electronic gauge pressure-bearing barrel; the electronic instrument connector is connected with an output end of the signal processing circuit; a long spaced detector and a short spaced detector are mounted inside the detector pressure-bearing barrel respectively; the logging source is fixedly arranged inside a rectangular groove in the back side surface of the drill collar and is used for providing logging gamma photons for the long spaced detector and the short spaced detector. The compensation density logging-while-drilling instrument is high in logging accuracy, high in vibration resistance and long in service life and fills up a domestic blank.
Description
Technical field
The invention belongs in connector for logging while drilling the oil well logging equipment measuring stratigraphic rock density, be specially compensation density logging while drilling apparatus.
Background technology
In petroleum industry geologic steering drilling, the density on real-time measuring well stratum near the eyes, to judging lithology, identification of hydrocarbon layer is significant.Being widely used of compensation density logger, all there is application in nonmetallic ore, coalfield, oil field.In fact, can apply in all occasions relevant with bulk density, such as determine coal seam, calculate degree of porosity, detection shale volume density etc.In actual applications, the normal combination with other logger of compensation density logging while drilling apparatus is logged well, and generally includes with brill gamma, with boring neutron and with boring ultrasonic hole diameter etc.
In prior art, adopted the mode proposing well logging to be placed down in well by density instrument by cable, compensate the measurement of density, but its compensation density cannot be obtained by the method for horizontal well and other complicated oil wells, the scope of application is little, complicated operation, and during measurement, instrument is directly exposed in well logging, influence factor is more, and certainty of measurement is low.
Summary of the invention
For problems of the prior art, the invention provides a kind of influence factor that can effectively reduce measurement result, safe and reliable, the compensation density logging while drilling apparatus that certainty of measurement is high.
The present invention is achieved through the following technical solutions:
Compensation density logging while drilling apparatus, comprises and boring very, and be successively set on brill very in mud flow guide sleeve, electronics pressure-bearing cylinder, probe pressure-bearing cylinder and well logging source; Bore very and at least arrange a hydrophthalmia, described mud flow guide sleeve is fixedly installed on the inside, front end of boring very, and the fixed end of mud flow guide sleeve is provided with the through hole being communicated with hydrophthalmia and arranging; Electronics pressure-bearing cylinder and probe pressure-bearing cylinder are successively set in the brill U-type groove that very side is offered; Signal processing circuit and power supply circuits are installed in electronics pressure-bearing cylinder inside, and one end arranges the electronics joint for connecting host computer; Electronics joint is connected with the output of signal processing circuit; Probe pressure-bearing cylinder inside installs long spacing detector and short spaced detector respectively; Well logging source is fixedly installed in the brill rectangular recess that very rear side is offered, for providing the gammaphoton of well logging for long spacing detector and short spaced detector.
Preferably, bore the two hydrophthalmia structures very adopting eccentric setting, bore the very corresponding enlarged-diameter that the part in probe pressure-bearing cylinder and well logging source is set, and bore to endure and to be respectively arranged with mud in the both sides of U-type groove and rectangular recess and the back side and to return and lead groove.
Preferably, mud flow guide sleeve is fixed on brill by hanging screw and very goes up, the wire connecting electronics joint is provided with bottom mud flow guide sleeve, wire outer setting has sealing to be arranged on the sealing shroud of drill collar and mud flow guide sleeve junction, and sealing shroud is fixedly connected with drill collar by the cover plate be fixed on drill collar.
Preferably, electronics pressure-bearing cylinder and probe pressure-bearing cylinder are fixed on brill respectively by securing cover plate and very go up; Electronics pressure-bearing cylinder comprises by the first electronics pressure-bearing cylinder of electronics center tap and the second electronics pressure-bearing cylinder; The electronics joint being provided with data-interface is connected with the free end of the first electronics pressure-bearing cylinder.
Further, collection Communication processing plate and signal temperature-compensation circuit plate is comprised by the installation of built-in electronic instrument framework in the first electronics pressure-bearing cylinder; Electronic instrument framework upper end is provided with electronics damping assembly; Installation high-voltage power module in second electronics pressure-bearing cylinder; Gather Communication processing plate to be used for carrying out counting collection and stores processor to the signal that long spacing detector and short spaced detector send; High-voltage power module is used for providing high voltage source to long spacing detector and short spaced detector; The output of signal temperature-compensation circuit plate is connected to the high voltage adjusting end of high-voltage power module for changing the High voltage output of high-voltage power module.
Further, long spacing detector and short spaced detector all adopt and are interconnected and the antivibration crystal of integrated antivibration encapsulation and antivibration photomultiplier transit tubular structure.
Further, by built-in probe mounting framework, long spacing detector and short spaced detector are installed in probe pressure-bearing cylinder; Probe mounting framework two ends are provided with damping assembly.
Further, be also provided with the pre-amplification circuit being connected to long spacing detector and short spaced detector output in probe pressure-bearing cylinder, through pulse, the output of pre-amplification circuit differentiates that wave-shaping circuit is connected to the input gathering Communication processing plate.
Further again, pre-amplification circuit and pulse differentiate that wave-shaping circuit adopts thick film encapsulation to be arranged in detection pressure-bearing cylinder.
Preferably, well logging source is arranged in rectangular recess by the storehouse, source of outer setting; Storehouse, source is axially the arranging porose back-up ring steady pin by two ends being provided with Cang Gai is very fixedly connected with brill; Very be fixedly connected with brill radial through the pressing plate being fixed on rectangular recess both sides.
Compared with prior art, the present invention has following useful technique effect:
The present invention, by being arranged on the mud flow guide sleeve of drill collar front end, can carrying out fragmentation to the mud cake in well logging, and carry out the water conservancy diversion outside two to mud, avoids the blocking to drill collar and the impact to internal electronic component; By the setting of U-type groove on drill collar and rectangular recess, accommodation space can be provided for electronic device, probe and well logging source, in the process measured, only be subject to mud influence, without the interference of other influences factor, also only need in measurement result analysis to consider mud influence, certainty of measurement is high; Two the raw information long spacing count rates relevant with density with short spaced detector collection by long spacing detector and short space counting rate, detect the density of earth formations of different depth; And each electronic device and probe are separately positioned in pressure-bearing cylinder, intensity is high, resistance to shock is strong, and long service life, can realize the bulk density of measurement rock stratum, well-digging limit, limit, has filled up the blank of domestication cosmogony density connector for logging while drilling.
Further, by two hydrophthalmias of eccentric setting, the construction demand of drilling well can be better met, for the position of U-type groove and rectangular recess provides sufficient installation space, have employed variable diameter design at the drill collar position of installing probe, expand its diameter and be arranged so that probe and well logging source as much as possible near the borehole wall, thus can reduce mud to the impact of measurement result as much as possible, improve detection accuracy, also provide sufficient installing space simultaneously.Utilize the mud that designs on the sidewall of reducing position to return to lead groove and reducer can be made to meet the needs that mud returns.
Further, utilize hanging screw to realize the fixing of mud flow guide sleeve, easy accessibility, utilizes the setting of sealing shroud, coordinates the installation of cover plate, realizes the seal isolation of annular space mud and hydrophthalmia mud; Ensure that the external connection of its communication and current supply line, with being fixed on the cover plate that brill very goes up, capping being carried out to the arrangement space of wire, preventing mud from directly washing away wire and sealing shroud.
Further, by the first electronics pressure-bearing cylinder and the second electronics pressure-bearing cylinder of relatively independent setting, high-voltage power module and signal processing circuit can be carried out being separated installation, ensure that the stability of power supply and the security reliability of Acquisition Circuit, and after standalone module is carried out packing respectively, be beneficial to follow-up maintenance and repair, convenient operation; Coordinate the electronics damping assembly and damping assembly that arrange respectively, ensure resistance to shock and the dependability of electronic circuit in each pressure-bearing cylinder.
Further, the pulse signal that probe exports is exported after pre-amplification circuit amplifies, differentiate to export after wave-shaping circuit shaping through impulse amplitude again, thus stablize unified signal source for signal processing circuit provides, better can carry out the storage of the collection of signal and data, transmission.
Further, by the probe adopting integrated antivibration to encapsulate, thus can meet the high-intensity oscillation requirement of well logging during, pre-amplification circuit and pulse differentiate that wave-shaping circuit adopts thick film encapsulation, increase antivibration unfailing performance; Reliable, long service life.
Further, to well logging storehouse, outer setting source, source, can better protect it and install, more safe and reliable being connected with rectangular recess simultaneously, utilize radial pressing plate and axial steady pin respectively, realize the fixing of its and install, fixing reliable, dislocation can not occur and lose, stable provides detection gammaphoton.
Accompanying drawing explanation
Fig. 1 is the axial section of structure described in example of the present invention.
Fig. 2 is the cross-sectional view at bin location place, source described in example of the present invention.
Fig. 3 is the cross-sectional view of U-type groove position described in example of the present invention.
Fig. 4 is signal processing flow block diagram of the present invention.
In figure: 1 is drill collar; 2 is mud flow guide sleeve; 3 is hanging screw; 4 is sealing shroud; 5 is cover plate; 6 is securing cover plate; 7 is data-interface; 8 is electronics joint; 9 is the first electronics pressure-bearing cylinder; 10 is electronic instrument framework; 11 is electronics center tap; 12 is the second electronics pressure-bearing cylinder; 13 is probe pressure-bearing cylinder; 14 is long spacing detector; 15 is short spaced detector; 16 is bridge screw; 17 is pressing plate; 18 is Cang Gai; 19 is storehouse, source; 20 is well logging source; 21 is hole back-up ring; 22 is hydrophthalmia; 23 lead groove for mud returns; 24 is steady pin; 25 is U-type groove; 26 is electronics damping assembly; 27 is collection communication disposable plates; 28 is signal temperature-compensation circuit plate; 29 is high-voltage power module; 30 is probe mounting framework; 31 is damping assembly; 32 is rectangular recess.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
Compensation density logging while drilling apparatus of the present invention, adopts the mounting structure of drill collar formula, and adopts anti-vibration, anti-high pressure and resistant to elevated temperatures vibrational power flow, can adapt to the working environment that down-hole is severe.Concrete whole installation, as shown in Figure 1, the mounting framework of drill collar 1 as instrument in the present invention and a part for down-hole equipment, after being usually located at drill bit or deflecting tool.Side opening one U-type groove 25 of drill collar 1, in U-type groove 25, install the first electronics pressure-bearing cylinder 9, second electronics pressure-bearing cylinder 12 and probe pressure-bearing cylinder 13 respectively, their wall thickness can meet the requirement of anti-down-hole slurry high pressure.With securing cover plate 6, first electronics pressure-bearing cylinder 9, second electronics pressure-bearing cylinder 12 and probe pressure-bearing cylinder 13 are fixed on drill collar 1.Storehouse, source 19 is arranged on the reducing position of drill collar 1, due to the subsides borehole wall that litho-density log principle mandates well logging source 20 and probe will be tried one's best.Existing well logging during can not realize pasting the borehole wall, by adopting reducing process, make storehouse, source 19, long spacing detector 14 and short spaced detector 15 can as much as possible near the borehole wall to improve detection accuracy.As shown in Figure 2, compress with pressing plate 17 in the rectangular recess 32 storehouse, source 19 being arranged on drill collar 1, pressing plate 17 bridge screw 16 is fixed on drill collar 1; With steady pin 24, storehouse, source 19 and drill collar 1 are fixed up again, prevent storehouse, source 19 from loosening.For preventing steady pin 24 from radially loosening, hole back-up ring 21 is adopted steady pin 24 to be realized locking.For realizing the electric communication with Other Instruments, mud flow guide sleeve 2 is provided with in the upper end of drill collar 1, core torpedo socket has been installed for being connected with Other Instruments in mud flow guide sleeve 2 top, core torpedo socket is connected with electronics joint 8 by wire, and mud flow guide sleeve 2 hanging screw 3 is fixed on drill collar 1; The sealing shroud 4 being arranged on drill collar 1 and mud flow guide sleeve 2 junction realizes the sealing setting of wire, the inside and outside of sealing shroud 4 is all designed with hermetically-sealed construction, pressure bearing and seal connector is inside installed, the seal isolation of annular space mud and hydrophthalmia mud can be realized, bore cover plate 5 pairs of sealing shrouds 4 very on 1 and wire carries out capping with being fixed on, then with securing cover plate 6, cover plate 5 is fixed on drill collar 1 further.
In order to meet the construction needs of drilling well, adopt eccentric two hydrophthalmias 22 structure, the sidewall for drill collar 1 reserves more wall thickness, provides U-type groove 25 to install instruments and mud pump delivery demand; Mud returns leads groove 23 and can be implemented in the reducer of drill collar 1 to meeting the needs that mud returns.
Comprise with brill density instrument circuit part: the long spacing detector 14 of the integration be made up of NaI crystal and photomultiplier respectively and short spaced detector 15, signal temperature-compensation circuit plate 28, high-voltage power module 29, pre-amplification circuit and pulse are differentiated wave-shaping circuit, gathered Communication processing plate 27, low-tension supply modular converter.As shown in Figure 4, high-voltage power module 29 provides high voltage source to photomultiplier, and signal temperature-compensation circuit plate 28 changes the output of high-voltage power module 29 by the high voltage adjusting end connecting high-voltage power module 29, thus reaches the object of temperature-compensating.Gammaphoton enters NaI crystal and produces photon, and these photons enter photomultiplier and photocathode effect produces photoelectron, and photoelectron doubles amplification under the effect of dynode, finally at anode output electric pulse; The pulse signal that photomultiplier exports output amplitude after pre-amplification circuit amplifies is the pulse signal of about 8V, through extra pulse, signal after amplification differentiates that wave-shaping circuit process output amplitude is 5V square-wave signal, gather Communication processing plate 27 and timing acquiring is carried out to these pulse signals, pulse signal number in the namely accumulative units time, i.e. counting rate.Simultaneously gather Communication processing plate 27 1 aspect by image data with sixteen bit system stored in the NDFlash memory of 1G × 8Bit, part image data is uploaded to ground by the downhole system of MWD in mud-pulse mode simultaneously and processes in real time.
The present invention is used for the rock density on real-time measuring well stratum near the eyes in drilling process, and one piece of 2 Curie Cs-137 radioactive source is housed inside storehouse, source 19, and source body is integral type encapsulation, and transverse direction is arranged on drill collar 1.Instrument entirety can long time continuous working in: under the well logging during condition that strong vibration 20g, High Voltage 140MPa, high-temperature 175 DEG C etc. are harsh, there is higher life and reliability, be applicable to geologic steering drilling and with brill formation evaluation.The bulk density of measurement rock stratum, well-digging limit, limit can be realized, avoid the impact of mud cake on measurement result, in connector for logging while drilling, be in considerable position.
In the circuit connection of signal transacting, the antivibration photomultiplier that probe uses antivibration crystal and Japanese genuine to produce, structure adopts integrated antivibration encapsulate, meets the high-intensity oscillation requirement of well logging during; Pre-amplification circuit and pulse differentiate that wave-shaping circuit adopts thick film encapsulation, increase antivibration unfailing performance; Gather communicating circuit employing high temperature 220 DEG C of processor SM470R1B1M-HT based on ARM7, storage space, up to 1G × 8Bit, fully meets well logging storage demand; Communication mode can according to the communication mode choice for use QBUS of docking system or RS485 communication.Adopt when data processing the two rib linear fit mode of single ridge to carry out the calculating of density and correcting value, adopt double source distance and quality of data differentiation technology to carry out borehole gap correction process.
The invention solves the domestic blank not having chemical source density connector for logging while drilling.By arranging the integrally-built rational deployment of instrument, reduce mud (or mud cake) as far as possible to the impact of measurement result and interference; Utilize the design to source chamber structure and well logging source, efficiently solve reliable fixing, the Fast Installation in the well logging source in the Design of Mechanical Structure of this quasi-instrument and the safe layout problem of overall instrument; Further, circuit design adopt modularization independently install, achieve good antivibration and reliably fastening, by the setting of high-temperature process device, integrated thick-film circuit and temperature-compensation circuit, efficiently solve the impact of temperature on Measurement reliability and certainty of measurement; Instrument overall work is stablized, long service life.
Claims (10)
1. compensation density logging while drilling apparatus, it is characterized in that, comprise and boring very (1), and be successively set on the mud flow guide sleeve (2) bored in very (1), electronics pressure-bearing cylinder, probe pressure-bearing cylinder (13) and the source of well logging (20);
Described brill is endured in (1) and is at least arranged a hydrophthalmia (22), it is inner that described mud flow guide sleeve (2) is fixedly installed on the front end of boring very (1), and the fixed end of mud flow guide sleeve (2) is provided with and is communicated with hydrophthalmia (22) through hole arranged;
Described electronics pressure-bearing cylinder and probe pressure-bearing cylinder (13) are successively set in the brill U-type groove (25) that very (1) side is offered; Signal processing circuit and power supply circuits are installed in electronics pressure-bearing cylinder inside, and one end arranges the electronics joint (8) for connecting host computer; Electronics joint (8) is connected with the output of signal processing circuit; Probe pressure-bearing cylinder (13) inside installs long spacing detector (14) and short spaced detector (15) respectively;
Described well logging source (20) is fixedly installed in the brill rectangular recess (32) that very (1) rear side is offered, for providing the gammaphoton of well logging for long spacing detector (14) and short spaced detector (15).
2. compensation density logging while drilling apparatus according to claim 1, it is characterized in that, bore very (1) and adopt two hydrophthalmias (22) structure of eccentric setting, bore very (1) correspondence and the enlarged-diameter of the part of probe pressure-bearing cylinder (13) and well logging source (20) is set, and bore and endure (1) and be respectively arranged with mud in the both sides of U-type groove (25) and rectangular recess (32) and the back side and return and lead groove (23).
3. compensation density logging while drilling apparatus according to claim 1, it is characterized in that, mud flow guide sleeve (2) is fixed on to bore by hanging screw (3) to be endured on (1), mud flow guide sleeve (2) bottom is provided with the wire connecting electronics joint (8), wire outer setting has sealing to be arranged on the sealing shroud (4) of drill collar (1) and mud flow guide sleeve (2) junction, and sealing shroud (4) is fixedly connected with drill collar (1) by the cover plate (5) be fixed on drill collar (1).
4. compensation density logging while drilling apparatus according to claim 1, is characterized in that, electronics pressure-bearing cylinder and probe pressure-bearing cylinder (13) are fixed on to bore respectively by securing cover plate (6) to be endured on (1); Electronics pressure-bearing cylinder comprises by the first electronics pressure-bearing cylinder (9) of electronics center tap (11) and the second electronics pressure-bearing cylinder (12); The electronics joint (8) being provided with data-interface (7) is connected with the free end of the first electronics pressure-bearing cylinder (9).
5. compensation density logging while drilling apparatus according to claim 4, it is characterized in that, installed by built-in electronic instrument framework (10) in the first electronics pressure-bearing cylinder (9) and comprise collection Communication processing plate (27) and signal temperature-compensation circuit plate (28); Electronic instrument framework (10) upper end is provided with electronics damping assembly (26); The interior installation high-voltage power module (29) of second electronics pressure-bearing cylinder (12); Gather Communication processing plate (27) and carry out counting collection and stores processor for the signal sent long spacing detector (14) and short spaced detector (15); High-voltage power module (29) is for providing high voltage source to long spacing detector (14) and short spaced detector (15); The output of signal temperature-compensation circuit plate (28) is connected to the high voltage adjusting end of high-voltage power module (29) for changing the High voltage output of high-voltage power module (29).
6. compensation density logging while drilling apparatus according to claim 1 or 5, it is characterized in that, long spacing detector (14) and short spaced detector (15) all adopt and are interconnected and the antivibration crystal of integrated antivibration encapsulation and antivibration photomultiplier transit tubular structure.
7. the compensation density logging while drilling apparatus according to claim 1 or 4, it is characterized in that, in probe pressure-bearing cylinder (13), by built-in probe mounting framework (30), long spacing detector (14) and short spaced detector (15) are installed; Probe mounting framework (30) two ends are provided with damping assembly (31).
8. the compensation density logging while drilling apparatus according to claim 1 or 4, it is characterized in that, also be provided with the pre-amplification circuit being connected to long spacing detector (14) and short spaced detector (15) output in probe pressure-bearing cylinder (13), through pulse, the output of pre-amplification circuit differentiates that wave-shaping circuit is connected to the input gathering Communication processing plate (27).
9. compensation density logging while drilling apparatus according to claim 8, is characterized in that, pre-amplification circuit and pulse differentiate that wave-shaping circuit adopts thick film encapsulation to be arranged in detection pressure-bearing cylinder (13).
10. compensation density logging while drilling apparatus according to claim 1, is characterized in that, well logging source (20) is arranged in rectangular recess (32) by the storehouse, source (19) of outer setting; The storehouse, source (19) being provided with Cang Gai (18) is endured (1) at the steady pin (24) axially being arranged porose back-up ring (21) by two ends and is fixedly connected with boring; Radial through the pressing plate (17) being fixed on rectangular recess (32) both sides and brill very (1) be fixedly connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708543.9A CN104500052A (en) | 2014-11-27 | 2014-11-27 | Compensation density logging-while-drilling instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708543.9A CN104500052A (en) | 2014-11-27 | 2014-11-27 | Compensation density logging-while-drilling instrument |
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| CN104500052A true CN104500052A (en) | 2015-04-08 |
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| CN201410708543.9A Pending CN104500052A (en) | 2014-11-27 | 2014-11-27 | Compensation density logging-while-drilling instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121628A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | A kind of modified model 2228 litho-density tool with the source of exemption |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
| CN114769434A (en) * | 2022-03-24 | 2022-07-22 | 日照兴业汽车配件股份有限公司 | Forming die and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106121628A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | A kind of modified model 2228 litho-density tool with the source of exemption |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
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| CN114769434A (en) * | 2022-03-24 | 2022-07-22 | 日照兴业汽车配件股份有限公司 | Forming die and using method thereof |
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