CN110478961B - Drilling fluid cup assembly for drilling engineering filtrate loss instrument - Google Patents
Drilling fluid cup assembly for drilling engineering filtrate loss instrument Download PDFInfo
- Publication number
- CN110478961B CN110478961B CN201910767280.1A CN201910767280A CN110478961B CN 110478961 B CN110478961 B CN 110478961B CN 201910767280 A CN201910767280 A CN 201910767280A CN 110478961 B CN110478961 B CN 110478961B
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- drilling fluid
- filter screen
- shaft
- cup
- filter
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- 238000005553 drilling Methods 0.000 title claims abstract description 109
- 239000012530 fluid Substances 0.000 title claims abstract description 94
- 239000000706 filtrate Substances 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 9
- 239000012065 filter cake Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 3
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/35—Self-supporting filtering elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
Abstract
The invention relates to the field of drilling instruments and meters, and discloses a drilling fluid cup assembly for a drilling engineering filtrate loss meter, which comprises a drilling fluid cup, a lower cup cover, a filtrate hole, an upper cup cover, a rotating shaft main body, a rotating shaft and a stirring shaft, wherein the rotating shaft main body, the rotating shaft and the stirring shaft form an internal stirring mechanism, a filter screen piece positioned below the stirring shaft is fixed at the bottom of an inner cavity of the drilling fluid cup, and the filter screen piece is designed in a cylindrical shape. This drilling fluid cup subassembly for drilling engineering filtration appearance, the design through cylindric filter screen spare replaces the filter screen of arranging in drilling fluid cup bottom, the drilling fluid is filtered with the bottom of filter screen spare again, and helical blade's rotation, make the filter residue that is located filter screen spare bottom shift up, ensure that the filter residue can not influence the filtration of follow-up drilling fluid, the accuracy nature of drilling fluid filtration loss has been improved, and to cleaning of filter screen spare inner wall when rotating through helical blade, make the filter residue can not plug up helical blade, drilling fluid filtration efficiency has been improved.
Description
Technical Field
The invention relates to the field of drilling instruments and meters, in particular to a drilling fluid cup assembly for a drilling engineering filtrate loss instrument.
Background
The fluid loss filter is used for simulating the fluid loss of drilling fluid and cement slurry in a deep well under high temperature and high pressure, and simultaneously preparing a filter cake formed after fluid loss in a high temperature and high pressure state, wherein a drilling fluid cup component is one of essential parts of the fluid loss filter, and the working principle of a drilling fluid cup refers to the following figure 4: the drilling fluid is injected into the drilling fluid cup 1, the top of the inner cavity of the drilling fluid cup 1 is pressurized by gas transmission, and the rotating shaft 5 is matched with the stirring shaft 6 to drive the stirring shaft 6 to rotate and stir uniformly, so that the drilling fluid penetrates through the filter screen 8 and the filtrate hole 201, and the filtrate loss is obtained according to the collected filtrate and the formed filter cake.
However, because filter screen 8 level sets up the bottom at the 1 inner chamber of drilling fluid cup, the drilling fluid filtration in-process, see through filter screen 8 and flow down by filtrate hole 201 and collect, form the filter cake in filter screen 8's top this moment, along with the increase of filtration time, the filter cake increases the filtration efficiency that can influence follow-up drilling fluid, thereby make the filtration efficiency of drilling fluid reduce, and because filter screen 8 and (mixing) shaft 6 are by a determining deviation, when the drilling fluid filters the back remaining less, filter screen 8 is stopped up very easily to the filter cake, lead to the unable filter screen 8 that sees through of a small part of drilling fluid, thereby influence the accuracy nature of drilling fluid filtration loss.
Disclosure of Invention
The invention provides a drilling fluid cup assembly for a drilling engineering fluid loss instrument, which has the advantages of high fluid loss efficiency and accurate fluid loss and solves the technical problems in the background art.
The invention provides the following technical scheme: the utility model provides a drilling fluid cup subassembly for drilling engineering filtration appearance, includes drilling fluid cup, next bowl cover, filtrate hole, upper bowl cover, pivot main part, rotation axis, (mixing) shaft, pivot main part, rotation axis, (mixing) shaft constitute the inside rabbling mechanism of drilling fluid cup, the bottom of drilling fluid cup inner chamber is fixed with the filter screen spare that is located the (mixing) shaft below, the filter screen spare is cylindric design, and reserves the clearance between the inner wall of filter screen spare and drilling fluid cup, the inside of filter screen spare is equipped with the helical blade who rotates along with the (mixing) shaft.
Preferably, the top and the bottom of the outer side of the filter screen element are both fixedly connected with a fixed shaft, and the filter screen element is fixed inside the drilling fluid cup through the fixed shaft.
Preferably, helical blade's outer edge and the inner wall contact of filter screen spare, the fixed cover in middle part of helical blade is equipped with the universal driving shaft, the top movable sleeve of universal driving shaft is equipped with fixed pipe, and the universal driving shaft can move in fixed intraductal, the top of fixed pipe and the bottom fixed connection of (mixing) shaft, the top of universal driving shaft is equipped with spacing card strip, spacing card strip and the bottom joint of fixed pipe, the top of universal driving shaft is equipped with and is located the inside sliding block of fixed pipe, and the direct cover of sliding block and universal driving shaft is equipped with the bearing, the sliding block is slidable in the fixed pipe, the top fixedly connected with spring of sliding block, the top of spring and the top fixed connection of fixed intraductal chamber.
Preferably, the inner cavity of the drilling fluid cup is provided with a flow guide sleeve positioned above the filter screen piece, the top of the flow guide sleeve is attached to the inner wall of the drilling fluid cup, and the bottom of the flow guide sleeve is positioned inside the filter screen piece.
The invention has the following beneficial effects:
1. this drilling fluid cup subassembly for drilling engineering filtration appearance, the design through cylindric filter screen spare replaces the filter screen of arranging in drilling fluid cup bottom, the drilling fluid is filtered with the bottom of filter screen spare both sides again, and helical blade's rotation, make the filter residue that is located filter screen spare bottom shift up, ensure that the filter residue can not influence the filtration of follow-up drilling fluid, the accuracy nature of drilling fluid filtration volume has been improved, and to cleaning of filter screen spare inner wall when rotating through helical blade, make the filter residue can not plug up helical blade, drilling fluid filtration efficiency has been improved, utilize filter screen spare side and bottom to filter simultaneously, the increase filter area that is showing, the filtration efficiency of drilling fluid has further been improved.
2. This drilling fluid cup subassembly for drilling engineering filtration appearance through pivot main part drive (mixing) shaft reverse rotation, after the drilling fluid filters, utilizes helical blade to make the filter residue aggregate in the bottom of filter screen spare inner chamber, and helical blade shifts up along with the universal driving shaft to extrude the filter residue, further filter the remaining drilling fluid extrusion in the filter residue, further improved the accuracy of drilling fluid filtration volume, compress into the cake with the filter residue simultaneously, so that to the collection and the detection of filter residue after the filtration finishes.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a structural screen member of the present invention;
FIG. 3 is a cross-sectional view of a structural fixation tube of the present invention;
fig. 4 is a schematic view of a prior art drilling fluid cup.
In the figure: 1. a drilling fluid cup; 101. a flow guide sleeve; 2. a lower cup cover; 201. a filtrate well; 3. an upper cup cover; 4. a rotating shaft main body; 5. a rotating shaft; 6. a stirring shaft; 7. a screen member; 701. a helical blade; 702. a linkage shaft; 7021. limiting clamping strips; 703. a fixed tube; 7031. a slider; 7032. a spring; 704. a fixed shaft; 8. and (4) a filter screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a drilling fluid cup assembly for a fluid loss filter in drilling engineering comprises a drilling fluid cup 1, a lower cup cover 2, a filtrate hole 201, an upper cup cover 3, a rotating shaft main body 4, a rotating shaft 5, a stirring shaft 6 and a filter screen member 7, wherein the lower cup cover 2 is screwed on the bottom of the drilling fluid cup 1 and is provided with a sealing ring to ensure that drilling fluid in the inner cavity of the drilling fluid cup 1 cannot permeate out in the filtration process, the upper cup cover 3 is screwed on the top of the drilling fluid cup 1, the rotating shaft main body 4 and the rotating shaft 5 are arranged in the middle of the upper cup cover 3, the rotating shaft main body 4 and the rotating shaft 5 can be driven to rotate by an external driving motor, the rotating shaft 5 is fixedly connected with the stirring shaft 6 positioned in the drilling fluid cup 1, the rotating shaft main body 4, the rotating shaft 5 and the stirring shaft 6 form a stirring mechanism, and in the filtration process, the stirring mechanism is driven to rotate by the external driving motor, the filter element 7 is designed in a cylindrical shape, a gap is reserved between the outer side of the filter element 7 and the inner wall of the drilling fluid cup 1, a helical blade 701 is movably sleeved in the inner cavity of the filter element 7, the outer edge of the helical blade 701 is in contact with the inner wall of the filter element 7, a linkage shaft 702 is fixedly sleeved in the middle of the helical blade 701, a fixed pipe 703 is movably sleeved at the top end of the linkage shaft 702, the linkage shaft 702 can move in the fixed pipe 703, and the top end of the fixed pipe 703 is fixedly connected with the bottom of a stirring shaft 6, the top end of the linkage shaft 702 is provided with a limiting clamping strip 7021, the limiting clamping strip 7021 is clamped with the bottom of the fixed pipe 703, the top end of the linkage shaft 702 is provided with a sliding block 7031 positioned inside the fixed pipe 703, the sliding block 7031 and the linkage shaft 702 are directly sleeved with bearings, the sliding block 7031 can slide in the fixed pipe 703, the top of the sliding block 7031 is fixedly connected with a spring 7032, the top end of the spring 7032 is fixedly connected with the top of the inner cavity of the fixed pipe 703, the linkage shaft 702 can not only rotate along with the stirring shaft 6 but also move in the fixed pipe 703 through the limiting clamping strip 7021, the design of the cylindrical filter screen 7 replaces the filter screen 8 arranged at the bottom of the drilling fluid cup 1, the drilling fluid is filtered by the two sides and the bottom of the filter screen 7, and the rotation of the helical blades 701 ensures that filter residues positioned at the bottom of the filter screen 7 move upwards, the filter residue does not influence the filtration of subsequent drilling fluid, and improves the accuracy of the drilling fluid loss, and through cleaning of helical blade 701 when rotating filter screen spare 7 inner wall, make the filter residue can not plug up helical blade 701, the drilling fluid filtration efficiency has been improved, utilize filter screen spare 7 side and bottom to filter simultaneously, the apparent increase filtration area, the filtration efficiency of drilling fluid has further been improved, after the drilling fluid filters, drive (mixing) shaft 6 counter-rotation through pivot main part 4, utilize helical blade 701 to make the filter residue gather in the bottom of filter screen spare 7 inner chamber, helical blade 701 shifts up along with universal driving shaft 702, and extrude the filter residue, further filter the remaining drilling fluid extrusion in the filter residue, the accuracy of drilling fluid filtration volume has further been improved, compress into the cake simultaneously with the filter residue, so that after the filter residue to the filter residue collect and detect.
The inner cavity of the drilling fluid cup 1 is provided with the flow guide sleeve 101 located above the filter screen piece 7, the top of the flow guide sleeve 101 is attached to the inner wall of the drilling fluid cup 1, the bottom of the flow guide sleeve 101 is located inside the filter screen piece 7, and therefore it is guaranteed that drilling fluid in the drilling fluid cup 1 only flows to the bottom through the filter screen piece 7 and is collected, and normal filtration of the drilling fluid is guaranteed.
When the filter is used, drilling fluid is injected into the drilling fluid cup 1, the drilling fluid is conveyed into the drilling fluid cup 1 through a main inlet on one side of the top of the drilling fluid cup 1 for pressurization, an external motor is started to drive the rotating shaft main body 4 to rotate, and then the stirring shaft 6 is driven to rotate for stirring, so that the filtration efficiency of the drilling fluid is improved, the drilling fluid is filtered through the filter screen piece 7, filtrate flows through the filtrate hole 201 in the middle of the lower cup cover 2 for collection, the linkage shaft 702 rotates along with the stirring shaft 6, filter residues in the filter screen piece 7 are led out of the upper part of the filter screen piece 7 and are stirred in cooperation with the stirring shaft 6, so that the drilling fluid above flows in, the filter residues cannot influence the filtration efficiency, the filtration efficiency of the drilling fluid is improved, after filtration is finished, the stirring shaft 6 is controlled to rotate reversely, the linkage shaft 702 rotates reversely, and the rotation of the linkage shaft 702 is matched under the self gravity action of the filter residues, and (3) guiding and conveying the filter residue to the bottom of the linkage shaft 702, matching with the elastic force of the spring 7032, pressing the filter residue, and simultaneously moving the linkage shaft 702 upwards to enable liquid remaining in the filter residue to flow through the filter screen member 7 for filtering, so that the accuracy of the filter loss of the drilling fluid is further improved, and finally, taking out the upper cup cover 3, and taking out and metering the filter cake in the filter screen member 7.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides a drilling fluid cup subassembly for drilling engineering filtration appearance, includes drilling fluid cup (1), next bowl cover (2), filtrating hole (201), upper cup cover (3), pivot main part (4), rotation axis (5), (mixing) shaft (6), its characterized in that: the stirring mechanism in the drilling fluid cup (1) is formed by the rotating shaft main body (4), the rotating shaft (5) and the stirring shaft (6), a filter screen piece (7) located below the stirring shaft (6) is fixed at the bottom of an inner cavity of the drilling fluid cup (1), the filter screen piece (7) is designed in a cylindrical shape, a gap is reserved between the filter screen piece (7) and the inner wall of the drilling fluid cup (1), spiral blades (701) rotating along with the stirring shaft (6) are arranged in the filter screen piece (7), a fixed shaft (704) is fixedly connected to the top and the bottom of the outer side of the filter screen piece (7), the filter screen piece (7) is fixed in the drilling fluid cup (1) through the fixed shaft (704), the outer edges of the spiral blades (701) are in contact with the inner wall of the filter screen piece (7), a linkage shaft (702) is fixedly sleeved in the middle of the spiral blades (701), and a fixed pipe (703) is movably sleeved at the top end of the linkage shaft (702), the linkage shaft (702) can move in the fixed pipe (703), the top end of the fixed pipe (703) is fixedly connected with the bottom of the stirring shaft (6), the top end of the linkage shaft (702) is provided with a limiting clamping strip (7021), the limiting clamping strip (7021) is clamped with the bottom of the fixed pipe (703), the top end of the linkage shaft (702) is provided with a sliding block (7031) positioned inside the fixed pipe (703), the sliding block (7031) and the linkage shaft (702) are directly sleeved with bearings, the sliding block (7031) can slide in the fixed pipe (703), the top of the sliding block (7031) is fixedly connected with a spring (7032), and the top end of the spring (7032) is fixedly connected with the top of the inner cavity of the fixed pipe (703);
when the device is used, drilling fluid is injected into a drilling fluid cup (1), gas is conveyed into the drilling fluid cup (1) through a main inlet on one side of the top of the drilling fluid cup (1) for pressurization, an external motor is started to drive a rotating shaft main body (4) to rotate at the same time, a stirring shaft (6) is driven to rotate for stirring, the drilling fluid is filtered through a filter screen piece (7), filtrate flows through a filtrate hole (201) in the middle of a lower cup cover (2) for collection, a linkage shaft (702) rotates along with the stirring shaft (6), filter residues in the filter screen piece (7) are led out of the upper part of the filter screen piece (7) and are stirred by the stirring shaft (6), so that the drilling fluid above flows in, after filtration is finished, the stirring shaft (6) is controlled to rotate reversely, the linkage shaft (702) rotates reversely, and the filter residues are guided to the bottom of the linkage shaft (702) by matching with the rotation of the linkage shaft (702) under the self gravity action of the filter residues, and the filter residue is pressed down by matching with the elasticity of the spring (7032), and the linkage shaft (702) moves upwards at the same time, so that the liquid remained in the filter residue can also flow through the filter screen piece (7) for filtering, and finally, the upper cup cover (3) is taken out, and the filter cake in the filter screen piece (7) is taken out for metering.
2. The drilling fluid cup assembly for the drilling engineering fluid loss instrument of claim 1, wherein: the inner cavity of the drilling fluid cup (1) is provided with a flow guide sleeve (101) located above the filter screen piece (7), the top of the flow guide sleeve (101) is attached to the inner wall of the drilling fluid cup (1), and the bottom of the flow guide sleeve (101) is located inside the filter screen piece (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910767280.1A CN110478961B (en) | 2019-08-20 | 2019-08-20 | Drilling fluid cup assembly for drilling engineering filtrate loss instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910767280.1A CN110478961B (en) | 2019-08-20 | 2019-08-20 | Drilling fluid cup assembly for drilling engineering filtrate loss instrument |
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| Publication Number | Publication Date |
|---|---|
| CN110478961A CN110478961A (en) | 2019-11-22 |
| CN110478961B true CN110478961B (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910767280.1A Active CN110478961B (en) | 2019-08-20 | 2019-08-20 | Drilling fluid cup assembly for drilling engineering filtrate loss instrument |
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| Country | Link |
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| CN (1) | CN110478961B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4199443A (en) * | 1978-05-30 | 1980-04-22 | Tauber Thomas E | Oil monitoring apparatus |
| CN102160576A (en) * | 2011-03-01 | 2011-08-24 | 九阳股份有限公司 | Soybean milk filtering device and soybean milk filtering method thereof |
| CN206450661U (en) * | 2017-01-20 | 2017-08-29 | 天津开发区四达科工贸发展有限公司 | A kind of No clean drilling fluid filter press |
| CN109586372A (en) * | 2018-12-14 | 2019-04-05 | 戚春凤 | A kind of auto-cutout protective device of mobile phone charging head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149440B (en) * | 2008-05-05 | 2015-02-04 | 富禄德奎普有限公司 | Apparatus and method for filtering a material from a liquid medium |
-
2019
- 2019-08-20 CN CN201910767280.1A patent/CN110478961B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4199443A (en) * | 1978-05-30 | 1980-04-22 | Tauber Thomas E | Oil monitoring apparatus |
| CN102160576A (en) * | 2011-03-01 | 2011-08-24 | 九阳股份有限公司 | Soybean milk filtering device and soybean milk filtering method thereof |
| CN206450661U (en) * | 2017-01-20 | 2017-08-29 | 天津开发区四达科工贸发展有限公司 | A kind of No clean drilling fluid filter press |
| CN109586372A (en) * | 2018-12-14 | 2019-04-05 | 戚春凤 | A kind of auto-cutout protective device of mobile phone charging head |
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| CN110478961A (en) | 2019-11-22 |
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Effective date of registration: 20210802 Address after: 276800 200m east of shuigoupo village, Jindun community, Xiaodian Town, Ju county, Rizhao City, Shandong Province Applicant after: Juxian Xiangwei Drilling Co.,Ltd. Address before: 310016 No. 54, Jinhai champagne Bay, Jianggan District, Hangzhou City, Zhejiang Province Applicant before: Qi Chunfeng |
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