CN113482580A - Vertical filtering desander suitable for high-pressure environment - Google Patents
Vertical filtering desander suitable for high-pressure environment Download PDFInfo
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- CN113482580A CN113482580A CN202110852708.XA CN202110852708A CN113482580A CN 113482580 A CN113482580 A CN 113482580A CN 202110852708 A CN202110852708 A CN 202110852708A CN 113482580 A CN113482580 A CN 113482580A
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- 238000001914 filtration Methods 0.000 title claims abstract description 35
- 230000007704 transition Effects 0.000 claims abstract description 45
- 239000004576 sand Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 238000011143 downstream manufacturing Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a vertical filtering desander suitable for a high-pressure environment, which comprises a high-pressure plug, a sleeve, a transition sleeve, a filter element and a lower end enclosure; the high-pressure plug and the lower end enclosure are respectively arranged at the top and the bottom of the sleeve; the sleeve is internally provided with a first cavity and a second cavity which are communicated with each other from top to bottom, the transition sleeve is fixed in the first cavity, the filter element is fixed in the second cavity, and the transition sleeve is tightly pressed at the top end of the filter element; the transition sleeve is provided with a vent hole, the filter element is provided with a plurality of filter holes, the transition sleeve with a hollow structure and the middle part of the filter element form a filter channel, and an annular air outlet cavity is arranged between the inner wall of the second cavity and the outer wall of the filter element; sealing elements are arranged at two ends of the filter element; an air inlet is formed in the side wall of the top of the sleeve, an air outlet is formed in the bottom of the sleeve, and the air outlet is communicated with the annular air outlet cavity. The filter element is vertically arranged, the gas direction is from top to bottom, and the gas enters and exits, so that the sand on the inner wall of the filter element is cleaned, sand grains are favorably gathered at the bottom, and the sand is conveniently discharged.
Description
Technical Field
The invention relates to the technical field of shale natural gas desanding equipment, in particular to a vertical filtering desander suitable for a high-pressure environment.
Background
The exploited shale natural gas contains gravel, and the desander is used for desanding the shale natural gas and is positioned at the front stage of the natural gas treatment process.
The existing desander adopts a filtering structure with an outer diameter, so that in the exploitation process of shale gas, the gas pressure can be unstable or even extremely high, and when the working pressure is increased suddenly, a filter cylinder can be flattened, so that the filtering condition is damaged, the desander and downstream process equipment are damaged, and great economic loss is caused. Under the condition of high pressure environment and extreme high pressure, the existing sand remover is easy to damage.
Disclosure of Invention
The invention provides a vertical filtering desander suitable for a high-pressure environment, which aims to solve the technical problem that the desander in the prior art is easy to damage under high pressure.
The technical scheme adopted by the invention is as follows: the vertical filtering desander suitable for the high-pressure environment comprises a high-pressure plug, a sleeve, a transition sleeve, a filter element and a lower end enclosure;
the high-pressure plug is arranged at the top end of the sleeve, and the lower end socket is arranged at the bottom end of the sleeve;
the sleeve is internally provided with a first cavity and a second cavity which are communicated with each other from top to bottom, the transition sleeve is pressed in the first cavity by the high-pressure plug, and the filter element is pressed in the second cavity by the transition sleeve;
the transition sleeve is provided with a vent hole, the filter element is provided with a plurality of filter holes, the transition sleeve and the middle part of the filter element in a hollow structure form a filter channel, the filter channel is communicated with the sand storage cavity of the lower end socket, and an annular air outlet cavity is arranged between the inner wall of the second cavity and the outer wall of the filter element;
a sealing element is arranged on the side wall of the top of the filter element, and a sealing element is arranged on the side wall of the bottom of the filter element;
an air inlet is formed in the side wall of the top of the sleeve, an air outlet is formed in the side wall of the bottom of the sleeve, the air inlet is communicated with the first cavity, and the air outlet is communicated with the annular air outlet cavity;
the shale gas passes through the air inlet, the transition sleeve, the filter element, the annular air outlet cavity and the air outlet in sequence, and the sand removal of the shale gas is realized.
As an optimal mode of the vertical filtering desander applicable to the high-pressure environment, the top of the first cavity is of an internal thread structure, and the high-pressure plug is provided with an external thread matched with the internal thread of the first cavity.
As a preferable mode of the vertical filtering desander suitable for the high-pressure environment, a first step, a second step and a third step are sequentially arranged at the bottom of the first cavity;
the transition sleeve is provided with a plurality of vent holes, and the bottom of the transition sleeve is provided with a first annular boss; the first annular boss of the transition sleeve is positioned at the second step, an annular air inlet cavity is formed between the outer wall of the transition sleeve and the inner wall of the first cavity, and the volume of the annular air inlet cavity is increased by the first step;
a limiting ring is arranged at the top end of the filter element and is positioned at the third step; the sealing element that sets up on the lateral wall at filter core top is the first sealing washer that sets up in spacing ring and third step lateral wall department to will annular air inlet cavity with seal between the annular air outlet cavity.
As a preferable mode of the vertical filtering desander suitable for the high-pressure environment, the top of the second cavity is provided with a reducing section, and the bottom of the second cavity is sequentially provided with a fourth step and a fifth step;
the arrangement of the variable diameter section and the fourth step enables the annular air outlet cavity to be formed between the inner wall of the second cavity and the outer wall of the filter element;
a positioning ring is arranged at the bottom of the filter element, a second annular boss is arranged at the upper part of the positioning ring, and the second annular boss is clamped at the fifth step; the sealing element arranged on the side wall of the bottom of the filter element is a second sealing ring arranged between the positioning ring and the side wall of the fifth step.
As a preferable mode of the vertical filtering desander suitable for the high-pressure environment, the bottom of the sleeve is also provided with a backflushing port, and the backflushing port is communicated with the annular air outlet cavity.
As a preferred mode of the vertical filtering desander applicable to the high-pressure environment, the bottom of the sleeve is also provided with a discharge port, and the discharge port is communicated with the annular air outlet cavity.
As a preferable mode of the vertical filtering desander suitable for the high-pressure environment, a first differential pressure gauge port is further arranged at the top of the sleeve and is communicated with the annular air inlet cavity;
and a second differential pressure gauge port is also arranged at the bottom of the sleeve and communicated with the annular air outlet cavity.
As a preferred mode of the vertical filtering desander applicable to the high-pressure environment, the lower seal head is welded, connected by threads or integrally formed on the end surface of the bottom of the sleeve.
The invention has the beneficial effects that:
1. the natural gas inlet forms an annular air inlet cavity, so that the local flow speed is reduced, the gas is convoluted to form a buffer area, the scouring of sand grains to the sleeve is reduced, and the service life of the equipment is prolonged.
2. The filter core is arranged vertically, the gas direction is from top to bottom, and the gas enters and exits, so that the sand on the inner wall of the filter core is cleaned, sand grains are favorably gathered at the bottom, and the sand discharge is facilitated.
3. The high-pressure plug end socket for the vertical filtering desander can be suitable for high-pressure environments.
4. Different from the existing external-in and internal-out filtering structure, the gas pressure may be unstable and extreme in the exploitation process of shale gas. When the operating pressure increases dramatically, it can cause the filter cartridge to collapse, thereby disrupting the filtration conditions, damaging the desander itself, or the downstream process equipment, and causing significant economic losses.
5. The transition sleeve is positioned by the locking nut and the gland, and is reliable in compression and sealing.
Drawings
Fig. 1 is a schematic structural diagram of a vertical filtering desander disclosed by the invention.
FIG. 2 is a cross-sectional view of the vertical filtering desander disclosed by the invention.
FIG. 3 is another cross-sectional view of the vertical filter grit separator disclosed in the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is an enlarged view of a portion B in fig. 3.
Reference numerals: 1. high-pressure plug; 2. a sleeve; 201. an air inlet; 202. a first differential pressure gauge port; 203. a second differential pressure gauge port; 204. a discharge port; 205. back flushing the opening; 206. an air outlet; 207. a diameter-changing section; 208. a first step; 209. a second step; 210. a third step; 211. a fourth step; 212. a fifth step; 3. a transition sleeve; 301. a vent hole; 302. a first annular boss; 4. a filter element; 5. a lower end enclosure; 6. an annular air intake cavity; 7. an annular air outlet cavity; 8. a limiting ring; 801. a first seal ring; 9. a positioning ring; 901. a second seal ring; 902. a second annular boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings, but embodiments of the present invention are not limited thereto.
Referring to fig. 1-3, the invention provides a vertical filtering desander suitable for a high-pressure environment, which is used for removing gravel in mined shale gas and comprises a high-pressure plug 1, a sleeve 2, a transition sleeve 3, a filter element 4 and a lower end socket 5.
Specifically, the high-pressure plug 1 is installed at the top end of the sleeve 2, and the lower seal head 5 is installed at the bottom end of the sleeve 2.
The sleeve 2 is a hollow structure, and a first cavity and a second cavity which are communicated with each other from top to bottom are formed in the sleeve. The transition sleeve 3 is pressed tightly in the first cavity by the high-pressure plug 1; the filter element 4 is compressed in the second cavity by the transition sleeve 3.
Be provided with ventilation hole 301 on the transition cover 3, be provided with a plurality of filtration pores on the filter core 4, hollow structure's transition cover 3 and 4 middle parts of filter core form and filter the passageway, filter the passageway and communicate with each other with the sand storage cavity of low head 5, have annular air outlet chamber 7 between 2 inner walls of sleeve and the 4 outer walls of filter core.
The side wall at the top of the filter element 4 is provided with a sealing element, so that the shale gas can not directly enter the annular gas outlet cavity 7, and can only enter the annular gas outlet cavity 7 through the transition sleeve 3 and the filter element 4. And a sealing element is arranged on the side wall of the bottom of the filter element 4, so that the shale gas cannot be leaked to the lower end socket 5.
An air inlet 201 is formed in the side wall of the top of the sleeve 2, an air outlet 206 is formed in the bottom of the side wall of the sleeve 2, the air inlet 201 is communicated with the first cavity, and preferably, the air inlet 201 is opposite to one ventilation hole 301 in the transition sleeve 3; the air outlet 206 is communicated with the annular air outlet cavity 7. Since the filter element 4 is vertically arranged, the gas direction is from top to bottom, in and out, so that the filter element 4 removes gravel. In addition, the gravity direction of the gravel is consistent with the gas flowing direction, so that sand accumulated on the wall of the filter element 4 is blown off by the passing gas and is accumulated in the sand storage cavity of the lower seal head 5, and the filter element 4 can work effectively for a long time.
Specifically, first cavity top is provided with the internal thread, is provided with on the lateral wall of high-pressure plug 1 with this internal thread matched with external screw thread, through screwing up high-pressure plug 1, realizes compressing tightly transition cover 3 and filter core 4.
Referring to fig. 4, the bottom of the first cavity is sequentially provided with a first step 208, a second step 209 and a third step 210.
Referring to fig. 4, a plurality of vent holes 301 are formed in the transition sleeve 3, and a first annular boss 302 is formed at the bottom of the transition sleeve 3; the first annular boss 302 of the transition sleeve 3 is located at the second step 209, an annular air inlet cavity 6 is formed between the outer wall of the transition sleeve 3 and the inner wall of the first cavity, and the first step 208 increases the volume of the annular air inlet cavity 6. The shale gas forms the annular air inlet cavity 6 at the air inlet 201, reduces the local flow velocity, and makes the gas convolute to form the buffer zone, reduces the scouring of sand to the inner wall of the sleeve 2, and prolongs the service life of the equipment.
Referring to fig. 4, the top end of the filter element 4 is provided with a limiting ring 8, the limiting ring 8 is located at the third step 210, the limiting ring 8 and the side wall of the third step 210 are further provided with a first sealing ring 801, which seals the annular air inlet cavity 6 and the annular air outlet cavity 7, so that the shale gas can only enter the transition sleeve 3 from the air inlet 201, then enter the filtering channel downwards, then exit from the filtering hole of the filter element 4 to the annular air outlet cavity, and finally exit from the air outlet 206.
Referring to fig. 2 and 5, the top of the second cavity is provided with a reducing section 207, and the bottom of the second cavity is sequentially provided with a fourth step 211 and a fifth step 212.
The provision of the reducer section 207 and the fourth step 211 forms an annular outlet chamber 7 between the inner wall of the sleeve 2 and the outer wall of the filter cartridge 4. The volume of the annular outlet cavity 7 can also be adjusted by changing the variable diameter section 207 and the fourth step 211.
Referring to fig. 5, the bottom of the filter element 4 is provided with a positioning ring 9, the upper portion of the positioning ring 9 is provided with a second annular boss 902, the second annular boss 902 is clamped at the fifth step 212 to perform a limiting function, and a second sealing ring 901 is further arranged between the positioning ring 9 and the side wall of the fifth step 212 to prevent shale gas from leaking to the lower end enclosure 5.
Further, referring to fig. 3, the bottom of the sleeve 2 is further provided with a back flushing port 205, and the back flushing port 205 is communicated with the annular air outlet cavity 7. During the sand removing process, the filter holes on the filter element 4 are inevitably blocked by the gravel, and in the condition, a high-pressure air source is connected to the backflushing port, so that part of the gravel can be flushed back to the filter channel from the filter holes and then falls into the sand storage cavity of the lower seal head 5.
Further, referring to fig. 2, the bottom of the sleeve 2 is further provided with a discharge port 204, and the discharge port 204 is communicated with the annular air outlet cavity 7, so that high pressure in the annular air outlet cavity 7 is released through the discharge port 204 during maintenance.
Further, referring to fig. 2, the top of the sleeve 2 is further provided with a first differential pressure gauge port 202, and the first differential pressure gauge port 202 is communicated with the annular air inlet cavity 6; the bottom of the sleeve 2 is also provided with a second differential pressure gauge port 203, and the second differential pressure gauge port 203 is communicated with the annular air outlet cavity 7. Be connected with the differential pressure gauge between first differential pressure gauge mouth 202 and the second differential pressure gauge mouth 203 for detect the atmospheric pressure difference between annular air inlet chamber 6 and the annular air outlet chamber 7, the atmospheric pressure of annular air inlet chamber 6 is all the same with the atmospheric pressure that admits air, the atmospheric pressure in the filtration passageway, when the filtration pore of filter core 4 blockked up too much, can cause the pressure in the annular air outlet chamber 7 to be obviously less than the atmospheric pressure in the annular air inlet chamber 6, the numerical value maintainer through observing the differential pressure gauge just knows the jam condition of filter core 4.
Further, the lower end enclosure 5 is welded, connected by screw threads or integrally formed on the end face of the bottom of the sleeve 2.
In order to more clearly illustrate the relationship between the first cavity, the second cavity, the annular inlet cavity, the annular outlet cavity and the filtering channel in the embodiment, the following is set forth: when the sleeve 2 is not provided with the transition sleeve 3 and the filter element 4, the hollow cavity in the sleeve 2 is divided into a first cavity at the upper part and a second cavity at the lower part. After the transition sleeve 3 is installed in the first cavity, the first cavity is divided into two parts, the space between the outer wall of the transition sleeve 3 and the first cavity is an annular air inlet cavity 6, and the space between the inner wall of the transition sleeve 3 is the upper part of the filtering channel. When the filter element 4 is installed in the second cavity, the second cavity is divided into two parts, the space between the inner wall of the second cavity and the outer wall of the filter element 4 is an annular air outlet cavity 7, and the space on the inner wall of the filter element 4 is the lower part of the filter channel.
The working principle of the invention is as follows:
1. the gas containing the sand shale enters from the gas inlet and reaches the annular gas inlet cavity, the flow section is enlarged, the space volume is enlarged, the flow velocity of the gas is reduced, the buffer effect is achieved, and the scouring of sand grains with kinetic energy to the sleeve is reduced; the gas changes the flow direction in the transition sleeve and enters the filter element; under the action of the pressure difference between the inlet and the outlet, the gas flows in and out to pass through the filter element and reach the outlet.
2. The sand containing shale body is in the circulation process, sand grains are separated by the filter element and attached to the inner wall of the filter element, due to the fact that the sand grains enter and exit from the upper part, the inlet is higher than the outlet, the gravity direction of the attached sand grains is consistent with the gas flowing direction, and therefore the sand grains accumulated on the wall of the filter element are blown down by the passing gas and are collected at the bottom of the desander. Thereby enabling the filter element to work effectively for a long time.
3. The collected sand is discharged from a valve connected with the bottom of the lower seal head.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A vertical filtering desander suitable for high-pressure environment is characterized by comprising a high-pressure plug, a sleeve, a transition sleeve, a filter element and a lower end enclosure;
the high-pressure plug is arranged at the top end of the sleeve, and the lower end socket is arranged at the bottom end of the sleeve;
the sleeve is internally provided with a first cavity and a second cavity which are communicated with each other from top to bottom, the transition sleeve is pressed in the first cavity by the high-pressure plug, and the filter element is pressed in the second cavity by the transition sleeve;
the transition sleeve is provided with a vent hole, the filter element is provided with a plurality of filter holes, the transition sleeve and the middle part of the filter element in a hollow structure form a filter channel, the filter channel is communicated with the sand storage cavity of the lower end socket, and an annular air outlet cavity is arranged between the inner wall of the second cavity and the outer wall of the filter element;
a sealing element is arranged on the side wall of the top of the filter element, and a sealing element is arranged on the side wall of the bottom of the filter element;
an air inlet is formed in the side wall of the top of the sleeve, an air outlet is formed in the side wall of the bottom of the sleeve, the air inlet is communicated with the first cavity, and the air outlet is communicated with the annular air outlet cavity;
the shale gas passes through the air inlet, the transition sleeve, the filter element, the annular air outlet cavity and the air outlet in sequence, and the sand removal of the shale gas is realized.
2. The vertical filtering desander applicable to the high-pressure environment as claimed in claim 1, wherein the top of the first cavity is of an internal thread structure, and the high-pressure plug is provided with an external thread matched with the internal thread of the first cavity.
3. The vertical filtering desander applicable to the high-pressure environment as claimed in claim 1, wherein a first step, a second step and a third step are sequentially arranged at the bottom of the first cavity;
the transition sleeve is provided with a plurality of vent holes, and the bottom of the transition sleeve is provided with a first annular boss; the first annular boss of the transition sleeve is positioned at the second step, an annular air inlet cavity is formed between the outer wall of the transition sleeve and the inner wall of the first cavity, and the volume of the annular air inlet cavity is increased by the first step;
a limiting ring is arranged at the top end of the filter element and is positioned at the third step; the sealing element that sets up on the lateral wall at filter core top is the first sealing washer that sets up in spacing ring and third step lateral wall department to will annular air inlet cavity with seal between the annular air outlet cavity.
4. The vertical filtering desander suitable for the high-pressure environment as claimed in claim 3, wherein the top of the second cavity is provided with a reducer section, and the bottom of the second cavity is provided with a fourth step and a fifth step in sequence;
the arrangement of the variable diameter section and the fourth step enables the annular air outlet cavity to be formed between the inner wall of the second cavity and the outer wall of the filter element;
a positioning ring is arranged at the bottom of the filter element, a second annular boss is arranged at the upper part of the positioning ring, and the second annular boss is clamped at the fifth step; the sealing element arranged on the side wall of the bottom of the filter element is a second sealing ring arranged between the positioning ring and the side wall of the fifth step.
5. The vertical filtering desander applicable to high-pressure environments as claimed in claim 1, wherein a backflushing port is further formed at the bottom of the sleeve, and the backflushing port is communicated with the annular air outlet cavity.
6. The vertical filtering desander applicable to high-pressure environments as claimed in claim 1, wherein a discharge port is further formed at the bottom of the sleeve, and the discharge port is communicated with the annular air outlet cavity.
7. The vertical filter desander suitable for high-pressure environment as claimed in claim 1, wherein the top of the sleeve is further provided with a first differential pressure gauge port, and the first differential pressure gauge port is communicated with the annular air inlet cavity;
and a second differential pressure gauge port is also arranged at the bottom of the sleeve and communicated with the annular air outlet cavity.
8. The vertical filtering desander suitable for high-pressure environment as claimed in claim 1, wherein the lower seal head is welded, screwed or integrally formed on the bottom end face of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110852708.XA CN113482580A (en) | 2021-07-27 | 2021-07-27 | Vertical filtering desander suitable for high-pressure environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110852708.XA CN113482580A (en) | 2021-07-27 | 2021-07-27 | Vertical filtering desander suitable for high-pressure environment |
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| CN113482580A true CN113482580A (en) | 2021-10-08 |
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| CN202110852708.XA Pending CN113482580A (en) | 2021-07-27 | 2021-07-27 | Vertical filtering desander suitable for high-pressure environment |
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| CN114856496A (en) * | 2022-06-30 | 2022-08-05 | 四川华宇石油钻采装备有限公司 | Cyclone filtering integrated sand remover |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856496A (en) * | 2022-06-30 | 2022-08-05 | 四川华宇石油钻采装备有限公司 | Cyclone filtering integrated sand remover |
| CN116181307A (en) * | 2023-04-27 | 2023-05-30 | 成都伊斯顿过滤器有限公司 | Sectional type well head desander based on natural gas exploitation is used |
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Application publication date: 20211008 |
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