CN107789885B - Petroleum downhole drilling fluid filtering device - Google Patents
Petroleum downhole drilling fluid filtering device Download PDFInfo
- Publication number
- CN107789885B CN107789885B CN201610804235.5A CN201610804235A CN107789885B CN 107789885 B CN107789885 B CN 107789885B CN 201610804235 A CN201610804235 A CN 201610804235A CN 107789885 B CN107789885 B CN 107789885B
- Authority
- CN
- China
- Prior art keywords
- filter screen
- scraper
- cylinder body
- drilling fluid
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 47
- 239000012530 fluid Substances 0.000 title claims abstract description 36
- 238000001914 filtration Methods 0.000 title claims abstract description 15
- 239000003208 petroleum Substances 0.000 title abstract description 4
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000009295 crossflow filtration Methods 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000003828 vacuum filtration Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- 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
- B01D29/01—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 flat filtering elements
- B01D29/03—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 flat filtering elements self-supporting
-
- 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
- B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
- B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
-
- 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
- B01D29/6484—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 translatory 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
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/08—Regeneration of the filter
- B01D2201/086—Regeneration of the filter using fluid streams co-current to the filtration direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/20—Pressure-related systems for filters
- B01D2201/204—Systems for applying vacuum to filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides a petroleum underground drilling fluid filtering device which comprises a cylinder body, a piston assembly and a scraper, wherein two mutually communicated piston cavities and scraper cavities are arranged in the cylinder body, the inner end of the piston assembly runs in the piston cavity in a sealing mode, the outer end of the piston assembly extends into the scraper cavity and is connected with the scraper in the scraper cavity, and a filter screen is arranged on the scraper. The filter screen includes cylindrical filter screen, entry filter screen, cylindrical filter screen sets up in the scraper periphery, the entry filter screen sets up on cylindrical filter screen outer port. The outer end of the cylinder body is connected with the end cover, the inner end of the cylinder body is connected with the base, and the base is provided with a through hole leading to the piston cavity. An annular groove is formed in the outer circumference of the cylinder body, and a hydraulic oil radial hole and a drilling fluid radial hole are formed in the annular groove in the radial direction. The invention comprehensively utilizes cross flow filtration and vacuum filtration, and simultaneously uses two modes of scraper type and back flushing type cleaning to flush the filter screen.
Description
Technical Field
The invention relates to a filtering technology of an underground logging-while-drilling instrument, in particular to an underground drilling fluid filtering device for an oil well.
Background
The logging-while-drilling instrument has high practical value and application prospect in the field of oil and gas exploration and development. The downhole drilling fluid detection technology requires a certain amount of drilling fluid to be extracted from the annulus, and operations such as filtering, pressure reduction, detection, discharge and the like are performed on the drilling fluid. By detecting the components of hydrocarbon gas contained in the drilling fluid, the hydrocarbon reservoir can be predicted, and the aim of guiding the ground drilling operation is fulfilled.
The logging-while-drilling instrument is generally designed in a modular manner, wherein the filter module is an important component of the logging-while-drilling instrument, and the filter effect is the premise that other modules work normally. Therefore, it is important to design a filtering apparatus with a reasonable structure to realize high-efficiency filtering.
Because the whole filter device is arranged in the drilling test instrument, the size is greatly limited, the whole filter device is ensured to operate durably and efficiently in the drilling process, and the situation that workers are forced to drill due to the blockage of a filter screen and the like is avoided, so that the anti-blockage function of the filter device is highly required.
At present, the anti-blocking cleaning modes mainly comprise a dirt suction type mode, a scraper type mode, a back flushing type mode and the like. But it is difficult to ensure the cleaning effect of the filter screen by only one cleaning method.
Disclosure of Invention
The invention aims to provide a petroleum underground drilling fluid filtering device which utilizes a hydraulic cylinder to generate vacuum, comprehensively utilizes cross flow filtration and vacuum filtration, and simultaneously utilizes two modes of scraper type and back flushing type cleaning to flush a filter screen.
The object of the invention can be achieved by the following technical measures:
this oil is drilling fluid filter equipment in pit includes cylinder body, piston assembly, scraper, the inside piston chamber and the scraper chamber that sets up two mutual intercommunications of cylinder body, the sealed operation in the piston chamber in the piston assembly inner, the outer end of piston assembly then stretches into in the scraper chamber and is connected with the scraper in the scraper chamber, be provided with the filter screen on the scraper.
The object of the invention can also be achieved by the following technical measures:
the filter screen includes cylindrical filter screen, entry filter screen, cylindrical filter screen sets up in the scraper periphery, the entry filter screen sets up on cylindrical filter screen outer port.
The outer end of the cylinder body is connected with the end cover, the inner end of the cylinder body is connected with the base, and the base is provided with a through hole leading to the piston cavity.
The outer circumference of the cylinder body is provided with an annular groove, and the inner diameter direction of the annular groove is provided with a hydraulic oil radial hole and a drilling fluid radial hole, wherein the hydraulic oil radial hole is communicated to the piston cavity, and the drilling fluid radial hole is communicated to the scraper cavity.
The hydraulic oil radial hole is communicated with the plug inlet axial liquid hole formed in the base body, and the drilling fluid radial hole is communicated with the drilling fluid axial liquid hole formed in the base body.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention utilizes hydraulic drive, has compact structure and solves the problem of volume and size limitation of the logging-while-drilling instrument.
2. The invention utilizes cross flow filtration at the inlet, carries out vacuum filtration inside, and comprehensively utilizes two filtration methods, thereby achieving more efficient filtration.
3. The invention scrapes off the slurry through the scraper inside, and can realize the continuous filtration for a long time by the back washing effect of the filter screen assembly when the hydraulic cylinder discharges the waste liquid.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a state diagram of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a state diagram of the external configuration of the present invention;
fig. 6 is a sectional view B-B of fig. 5.
In the figure: the device comprises a base body 1, an outer cylinder 2, a cylinder body 3, a filter screen assembly 4, an end cover 5, a scraper 6, a piston assembly 7, a base 8, hydraulic oil radial holes 3-1, drilling fluid radial holes 3-2, annular grooves 3-4, a cylindrical filter screen 4-1 and an inlet filter screen 4-2.
Detailed Description
The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention.
According to the figures 1-6, the oil well drilling fluid filtering device comprises a cylinder body 3, a piston assembly 7 and a scraper 6, wherein two piston cavities and scraper cavities which are communicated with each other are arranged inside the cylinder body, the inner end of the piston assembly runs in the piston cavity in a sealed mode, the outer end of the piston assembly extends into the scraper cavity and is connected with the scraper in the scraper cavity, and a filter screen is arranged on the scraper. The filter screen includes cylindrical filter screen 4-1, entry filter screen 4-2, cylindrical filter screen sets up in the scraper periphery, the entry filter screen sets up on cylindrical filter screen outer port. The outer end of the cylinder body is connected with the end cover 5, the inner end of the cylinder body is connected with the base 8, and the base is provided with a through hole leading to the piston cavity. An annular groove is formed in the outer circumference of the cylinder body, a hydraulic oil radial hole 3-1 and a drilling fluid radial hole 3-2 are formed in the annular groove in the radial direction, the hydraulic oil radial hole is communicated to the piston cavity, and the drilling fluid radial hole is communicated to the scraper cavity. The cylinder body is arranged in a radial blind hole formed in the base body 1, the outer side of the base body is sleeved with the outer barrel 2, the end cover is connected to the edge of a radial hole formed in the outer barrel, a through hole formed in the base is communicated with a plug outlet axial liquid hole formed in the base body, a hydraulic oil radial hole is communicated with a plug inlet axial liquid hole formed in the base body, and a drilling fluid radial hole is communicated with a drilling fluid axial liquid hole formed in the base body.
One end of the cylinder body 3 is fastened with the base 8 through screws, the other end of the cylinder body is in contact with the end cover 5, and the end cover 5 is connected with the outer cylinder 2 through screws. The cylinder body 3 is fixed inside the base body 1, a piston assembly 7 is arranged inside the cylinder body, a piston rod of the piston assembly 7 is connected with the scraper 6 through threads, and the outer surface of the scraper 6 is in contact with the inner surface of the cylindrical filter screen 4-1. Wherein the filter screen assembly 4 consists of a cylindrical filter screen 4-1 and an inlet filter screen 4-2. The surface of the cylinder body 3 is provided with corresponding annular grooves 3-3 and 3-4, and two radial holes, namely a hydraulic oil radial hole 3-1 and a drilling fluid radial hole 3-2, are punched and are respectively used for flowing hydraulic oil and drilling fluid.
As shown in fig. 5 and 6, the communication between the annular groove 3-3 and the hydraulic oil line is not in the middle symmetrical plane. The section B-B in the upper drawing is on a section of the plane of symmetry which is 18.75mm to the left, and the hydraulic oil line is also connected to the annular groove 3-3 on this section, so that the hydraulic oil can flow into the radial bore 3-1. This is done so as not to conflict with other circuits. The drilling fluid radial hole 3-2 is communicated with the two axial through holes so as to facilitate the use of other instruments for the drilling fluid after filtration.
When a hydraulic cylinder in the logging-while-drilling instrument starts to extract drilling fluid, the internal pressure of the hydraulic cylinder is lower than the annular pressure, and the drilling fluid flows through the radial drilling fluid hole 3-2 and enters the logging-while-drilling instrument through the inlet filter screen 4-2 and the cylindrical filter screen 4-1 under the action of pressure difference. The piston 7 and the scraper 6 are pushed to reciprocate by controlling the flow direction of hydraulic oil in the hydraulic oil radial holes 3-1, so that the aim of scraping filter cakes on the inner surface of the cylindrical filter screen 4-1 is fulfilled. After the detection is finished, the logging-while-drilling instrument discharges the waste liquid, the waste liquid reversely flows out through the drilling fluid radial holes 3-2, the filter screen combination 4 is reversely washed, and solid-phase particles accumulated on the surface of the filter screen can be removed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, but other equivalents may be used without departing from the spirit and scope of the invention.
Claims (1)
1. The oil downhole drilling fluid filtering device is characterized by comprising a cylinder body, a piston assembly and a scraper, wherein two piston cavities and scraper cavities which are communicated with each other are arranged in the cylinder body, the inner end of the piston assembly runs in the piston cavity in a sealing manner, the outer end of the piston assembly extends into the scraper cavity to be connected with the scraper in the scraper cavity, and a filter screen is arranged on the scraper;
the filter screen comprises a cylindrical filter screen and an inlet filter screen, the cylindrical filter screen is arranged at the periphery of the scraper, and the inlet filter screen is arranged at the outer end port of the cylindrical filter screen; the outer end of the cylinder body is connected with the end cover, the inner end of the cylinder body is connected with the base, and the base is provided with a through hole leading to the piston cavity; an annular groove is formed in the outer circumference of the cylinder body, and a hydraulic oil radial hole and a drilling fluid radial hole are formed in the annular groove in the radial direction, wherein the hydraulic oil radial hole is communicated to the piston cavity, and the drilling fluid radial hole is communicated to the scraper cavity; the cylinder body is arranged in a radial blind hole formed in the base body, an outer barrel is sleeved outside the base body, the end cover is connected to the edge of a radial opening formed in the outer barrel, a through hole formed in the base is communicated with a plug outlet axial liquid hole formed in the base body, a hydraulic oil radial hole is communicated with a plug inlet axial liquid hole formed in the base body, and a drilling fluid radial hole is communicated with a drilling fluid axial liquid hole formed in the base body;
one end of the cylinder body is fastened with the base through a screw, the other end of the cylinder body is contacted with the end cover, the end cover is connected with the outer cylinder through a screw, the cylinder body is fixed in the base body, a piston assembly is arranged in the cylinder body, a piston rod of the piston assembly is connected with a scraper through threads, the outer surface of the scraper is contacted with the inner surface of a cylindrical filter screen, and the filter screen assembly consists of the cylindrical filter screen and an inlet filter screen; the surface of the cylinder body is provided with two corresponding annular grooves, and hydraulic oil radial holes and drilling fluid radial holes are punched and are respectively used for flowing hydraulic oil and drilling fluid;
the annular groove is communicated with the hydraulic oil pipeline not on the symmetrical plane at the right middle, but is connected to the annular groove on the section deviating to the left side, so that the hydraulic oil flows into the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610804235.5A CN107789885B (en) | 2016-09-05 | 2016-09-05 | Petroleum downhole drilling fluid filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610804235.5A CN107789885B (en) | 2016-09-05 | 2016-09-05 | Petroleum downhole drilling fluid filtering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107789885A CN107789885A (en) | 2018-03-13 |
| CN107789885B true CN107789885B (en) | 2021-01-19 |
Family
ID=61529875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610804235.5A Active CN107789885B (en) | 2016-09-05 | 2016-09-05 | Petroleum downhole drilling fluid filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107789885B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495073A (en) * | 1983-10-21 | 1985-01-22 | Baker Oil Tools, Inc. | Retrievable screen device for drill pipe and the like |
| GB2487695B (en) * | 2007-05-18 | 2012-09-19 | Mi Llc | Reusable filters for fluid loss measurements of drilling fluids |
| CN202788831U (en) * | 2012-04-01 | 2013-03-13 | 中国石油集团西部钻探工程有限公司 | Rolling type detection device convenient to disassemble and assemble |
| CN104474763B (en) * | 2014-12-18 | 2016-08-24 | 大连容大资源循环利用咨询设计有限公司 | A kind of thickness paste squeezing dehydration device |
| CN204782857U (en) * | 2015-01-31 | 2015-11-18 | 成都科盛石油科技有限公司 | Slidingtype oil drilling liquid filtration equipment |
| CN104667600B (en) * | 2015-02-10 | 2016-07-13 | 杭州电子科技大学 | A kind of down hole filter system being applied to well logging during |
| CN206008217U (en) * | 2016-09-05 | 2017-03-15 | 中石化石油工程技术服务有限公司 | A kind of down-hole drilling fluids defecator |
-
2016
- 2016-09-05 CN CN201610804235.5A patent/CN107789885B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107789885A (en) | 2018-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105688487B (en) | A kind of high pressure device for separating mud and water and mud-water separation method | |
| CN205613124U (en) | High pressure sludge -water separation device | |
| CN109488255B (en) | Casing cleaning tool matched with coiled tubing | |
| CN201622177U (en) | Pressure testing device of blowout preventer | |
| CN107789885B (en) | Petroleum downhole drilling fluid filtering device | |
| CN206008217U (en) | A kind of down-hole drilling fluids defecator | |
| CN204371161U (en) | Collection tool for drill grinding materials | |
| CN201391255Y (en) | Continuous sand washing device for oil wells and water wells | |
| CN104667600B (en) | A kind of down hole filter system being applied to well logging during | |
| CN106050226B (en) | Sample pumping and discharging device applied to logging-while-drilling instrument | |
| CN202250055U (en) | Probe system | |
| RU2663778C1 (en) | Fine well filter | |
| CN106943797B (en) | Solid-liquid separation device and solid-liquid separation method for underground drilling fluid | |
| CN108397189B (en) | Formation test probe | |
| CN204754873U (en) | Belt cleaning device is scraped to sleeve pipe | |
| CN205638337U (en) | Full latus rectum of tubular column blocks up device | |
| RU2590924C1 (en) | Well fluid cleaning filter | |
| CN204113157U (en) | Oil well operation plug-removing device | |
| RU2453676C1 (en) | Device for cleaning walls of production string and bottom hole | |
| CN207989305U (en) | One kind can sand washing screw pump | |
| AU2009286190B2 (en) | Method of using new flushing ports during cleaning of a piston accumulator | |
| CN220726251U (en) | Process pipe column for uniform injection of screen pipe completion horizontal well | |
| CN114607323B (en) | Two-stage sand control pipe column and use method thereof | |
| CN204941877U (en) | A kind of oil well pump | |
| RU132129U1 (en) | FILTER Borehole anti-sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220224 Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: Sinopec Jingwei Co.,Ltd. Patentee after: Shengli geological logging company of Sinopec Jingwei Co.,Ltd. Address before: Room 703, block a, Beichen world center, 8 Beichen West Road, Chaoyang District, Beijing 100020 Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: GEOLOGICAL LOGGING BRANCH OF SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right |