CN103223277A - Multiphase shock excitation sand remover and sand removing method of sand-containing fluid - Google Patents
Multiphase shock excitation sand remover and sand removing method of sand-containing fluid Download PDFInfo
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- CN103223277A CN103223277A CN2013101899585A CN201310189958A CN103223277A CN 103223277 A CN103223277 A CN 103223277A CN 2013101899585 A CN2013101899585 A CN 2013101899585A CN 201310189958 A CN201310189958 A CN 201310189958A CN 103223277 A CN103223277 A CN 103223277A
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Abstract
The invention relates to a multiphase shock excitation sand remover and a sand removing method of sand-containing fluid. The multiphase shock excitation sand remover is installed on the front end of an oil-gas mixed conveying pump and comprises a vertical-type sand remover shell, wherein the top of the shell is provided with a gas-liquid inlet and connected with an entrance vertical pipe; a filter net frame is installed in the shell, a container space on the lower part of the filter net frame is a sand collection chamber, the bottom of the sand collection chamber is provided with a sand discharging port, and the side wall of the sand collection chamber is provided with a water filling port; and the upper part of the filter net frame is a closed guide body, the lower part of the filter net frame is a cylindrical filter net frame, and the closed guide body is connected with the cylindrical filter net frame into a whole. The outer side wall of the closed guide body is provided with a drooped elastic shock excitation plate which is unfolded outwards; and an outlet in the bottom of the cylindrical filter net frame is connected with a corrugated pipe, and the corrugated pipe is communicated to a gas-liquid outlet in the bottom of the shell. According to a multiphase medium sand remover with a brand-new structure and a sand removing method, the pressure difference of the sand remover and the damage replacement period of a filter net can be greatly reduced, the operation and maintenance cost can be reduced, online sand washing and sand discharging can be realized, and the mixed conveying pump can run high efficiently and stably.
Description
Technical field
The invention belongs to ground surface works oil and gas multiphase flow technical field in the oil exploitation, be specifically related to the heterogeneous exciting desander and the heterogeneous exciting desanding method that use in a kind of supercharging mixed transportation process system.
Background technology
At present, in the oilfield surface engineering oil-gas gathering and transportation system, adopt supercharging heating oil and gas multiphase flow technology more and more, its system and flow process be as shown in Figure 1: the wellblock gas mixture is after container type gs-oil separator 1 separates, the gas-liquid part is earlier by advancing pump header 2, mix defeated pump group 3 through parallel connection and carry, enter in the tubular heater 5 and heat by advancing stove header 4 again, enter again at last in the long distance oil-gas mixed transporting tube road 6; A part of natural gas of separating from gs-oil separator 1 then is introduced into the gas that acts as a fuel in the tubular heater 5 and uses.
Production practices prove that the operational efficiency of mixed defeated pump group 3 in parallel of the capital equipment in this process system and tubular heater 5 is low, fault rate is high, and the Operation and Maintenance difficulty of keeping the long-term normal operation of system is big, cost is high.Its basic reason is the equipment self unreasonable structure, or do not set up scientific and reasonable configuration-system, wherein mix defeated pump and just have such problem: it is poor that the pump of mixed defeated pump is joined the filter desanding effect, causes the double-screw mixing transmission pump rate of wear to accelerate updating maintenance expense height; Filter is taked artificial unloading's sediment outflow and updating maintenance mode, does not meet the SHE requirement.
Present pump is joined filter set and is contained in the arrival end that mixes defeated pump, is mainly the screen frame formula, discrete and horizontal two kinds.Operation principle is: fluid enters the screen frame inboard, and in frame, the gas-liquid medium passes the filter screen that is not blocked by solid particle and enters pump intake with the sand or like solid interception.The subject matter of this filter has two:
(1) along with the accumulation of solid particle in the screen frame, will be increased gradually by the screen area of solid particle shutoff, the screen area of negotiable gas-liquid medium reduces gradually, causes that filtration pressure difference rises, and easily causes filter screen to press the damage of collapsing; Need regular termination of pumping, long-pending sand of cleaning or replacing filter screen promptly increase maintenance cost and bring troublesome poeration again.
(2) cleaning or when changing filter screen need be opened the blind flange lid of filter on the spot, manually extracts filter screen frame out, and solid of pouring out in it stockpiles thing.At cold district, all be located at indoor because of mixing defeated pump and filter thereof, in the operating process of strainer screen cleaning or replacing, crude oil trickles to ground, natural gas emissions arrives the pump house space, and the greasy dirt that adheres in the solid particle that cleans out can't clean, and causes the safety and the environmental issue that are difficult to avoid.
Summary of the invention
To mix defeated pump strainer desanding effect in the existing supercharging oil gas mixed transportation process system poor in order to solve, the problem that maintenance cost is high, the object of the invention are to provide a kind of new heterogeneous exciting desander that is connected the long-pending sand of on-line cleaning under the operating mode that can not stop production between gs-oil separator and the oil-gas mixed delivery pump, reduces the Operation and Maintenance cost.
For addressing the above problem, the present invention takes following technical scheme: a kind of heterogeneous exciting desander is characterized in that: it comprises a vertical desander housing, is provided with the gas-liquid import and connects an inlet standpipe in described case top; In described housing filter screen frame is housed, the vessel space of described filter screen frame bottom is a sand collecting chamber, and the bottom of described sand collecting chamber is provided with sand removing hole; Described filter screen frame top is the confined bed fluid, and the bottom is the circle tube leaching net frame, and described confined bed fluid and described circle tube leaching net frame are connected as a single entity, and described confined bed fluid lateral wall is provided with elasticity exciting plate sagging and that outwards scatter; Described circle tube leaching net frame bottom outlet connects a bellows, leads to the gas liquid outlet that described housing bottom is provided with.
Described inlet standpipe is formed by inverted U-shaped section and vertical section, described inverted U-shaped section gas-liquid import that is connected in case top, and vertically section is connected in the oil and gas multiphase flow pipeline.
Described confined bed fluid is a conical fair water cone, the small end of described fair water cone is relative with the import of described case top, described fair water cone outer wall is provided with described elasticity exciting plate, and described elasticity exciting plate upper end is fixed with conical fair water cone, and the lower end is a free end.
Described elasticity exciting plate is a steel spring plate.
One gag lever post is arranged at described confined bed fluid top, and clearance-type is inserted in the gas-liquid import of described case top.
In the periphery of described circle tube leaching net frame, fix sheathed several truncated cone-shaped kuppe vertically, the big end of truncated cone-shaped kuppe up, small end and described circle tube leaching net frame outer wall have certain clearance; Between the side of described truncated cone-shaped kuppe and desander housing, be connected several floors.
The vertical section of described truncated cone-shaped kuppe is one trapezoidal.
Side in described sand collecting chamber also is equiped with filler pipe, leads to described sand collecting chamber.
Another purpose of the present invention is to provide a kind of desanding method that contains the sand flow body.
This desanding method uses aforesaid heterogeneous exciting desander, contains the sand flow body and flows into from described inlet standpipe, and the gas-liquid medium is discharged through described gas liquid outlet in the fluid, and the sand in the fluid is discharged by the sand removing hole of sand collecting chamber.
Specifically comprise following process: contain the sand flow body and flow to the inlet standpipe, in the pipeline section that rises, form the slug flow that constitutes by liquid plug and vent plug, slug flow is unrestrained downwards through conical fair water cone, impact elasticity exciting plate makes it produce the upper and lower elastic displacement of pointing to the housing axis, and the periodic vibration that under the elastic force effect of steel spring plate, resets, the circle tube leaching net frame that drive is attached thereto together produces periodic vibration, contain in the sand flow body gas-liquid medium and pass filter screen to enter into net inboard and be pooled to bellows, discharge through gas liquid outlet; Contain the outside that sand in the sand flow body is intercepted at filter screen, under the acting in conjunction of gravity and the vibration of circle tube leaching net frame, sink in sand collecting chamber, sand is discharged by sand removing hole.
During sediment outflow, the valve of opening filler pipe earlier feeds hot water in sand collecting chamber, the greasy dirt of flushing in the sand, the greasy dirt that washes out swim in hot water top and the filter screen that covers sand collecting chamber and then pass the circle tube leaching net frame is pooled to bellows with the gas-liquid medium and discharges through gas liquid outlet; After the washed-out sand operation is finished, open the valve sediment outflow of sand removing hole again.
The principle that heterogeneous exciting desander provided by the invention and desanding method can utilize fluid oppositely to enter filter screen frame, the long-pending sand of on-line cleaning also passes through the short distance discharge of pipes to outdoor sand-transport truck under the operating mode that do not stop production, and reduces the Operation and Maintenance cost, and environmental protection ensures safety.
Owing to take above scheme, the present invention can obtain following beneficial effect:
1, this desander has the sand flow of containing body and oppositely enters filter screen frame, does not have long-pending sand in the filter screen frame; The solid particle that is blocked is shaken off the function that sand grains does not block screen grid, do not reduce the strainer filtering area, keeps its filtration pressure difference not rise pressing close to the screen frame that the screen frame outside vibrated.And the sand collecting chamber that the solid particle that is blocked accumulates in device bottom discharges, and does not contact with filter screen, can realize the long-pending sand of on-line cleaning and pass through the short distance discharge of pipes to outdoor sand-transport truck under the operating mode that do not stop production.
2, because its special structure and operation principle, this desander can be eliminated by solid particle and stop up and the filtration pressure difference rising of generation, the spoilage of filter screen is reduced significantly, the replacement cycle prolongs significantly, realized low maintenance expense and safety and environmental protection operation operation.
3, at the inlet inlet porting standpipe of this device, form gas-liquid slug flow straight up, by the liquid plug impact elasticity exciting plate that intermittently flows into, excite the whole up-down vibration of desander screen frame, shake off filter screen sand grains, prevent the effect that eyelet stops up.
4, this desander can be connected on after the gs-oil separator before the oil and gas multiphase flow pump inlet flow-harmonization device, to concentrate the solid particle of removing in total liquid air-flow body, reduces that solid particle deposit and to mixing the infringement of failing pump in follow-up mixed delivering pump inlet flow-harmonization device.It also can be applicable in similarly the process for purifying that contains the sand flow body.
Description of drawings
Fig. 1 shows supercharging heating oil and gas multiphase flow system and technological process in the prior art.
Fig. 2 shows the technological process of supercharging heating oil and gas multiphase flow system in the first embodiment of the invention.
Fig. 3 shows the technological process of supercharging heating oil and gas multiphase flow system in the second embodiment of the invention.
Fig. 4 shows the structure chart of the heterogeneous exciting desander of the present invention.
Fig. 5 has shown the cross-sectional view of filter screen frame.
The specific embodiment
In order to make technical scheme of the present invention clearer, below in conjunction with the concrete introduction of drawings and Examples.
A kind of heterogeneous exciting desander 10 provided by the invention, can be arranged in Fig. 2, oil and gas multiphase flow system shown in Figure 3 and the technological process: the import of heterogeneous exciting desander 10 is connected with the gas liquid outlet of gs-oil separator 20, the gas liquid outlet of heterogeneous exciting desander 10 is connected with oil-gas mixed delivery pump group 40 through advancing pump header 30, oil-gas mixed delivery pump group 40 enters in the tubular heater 60 and heats by advancing stove header 50 again, enters at last in the long distance oil-gas mixed transporting tube road 70 again; Perhaps, the import of heterogeneous exciting desander 10 is connected with the gas liquid outlet of gs-oil separator 20, and the gas liquid outlet of heterogeneous exciting desander 10 is connected with a flow-harmonization device 80, and the outlet of flow-harmonization device 80 is connected with oil-gas mixed delivery pump group 40 again.
Heterogeneous exciting desander 10, self structure as shown in Figure 4, comprise a vertical desander housing 11, be provided with the gas-liquid import at housing 11 tops and connect long inlet standpipe 12, inlet standpipe 12 is formed by inverted U-shaped section 121 and vertical section 122, inverted U-shaped section 121 import that is connected in case top, vertically section 122 is connected in the outlet of gs-oil separator 20.
Be provided with gas liquid outlet 13 and sand removing hole 14 in the bottom of housing 11; In housing 11 filter screen frame is housed, the vessel space of filter screen frame bottom is a sand collecting chamber 16, and sand removing hole 14 is located at the bottom of sand collecting chamber 16.
Filter screen frame top is confined bed fluid 151, and the bottom is a circle tube leaching net frame 152.The small end of confined bed fluid is relative with the import of case top, and is provided with a gag lever post, is inserted in the gas-liquid import; Confined bed fluid 151 is connected as a single entity with circle tube leaching net frame 152, and the outlet at bottom of circle tube leaching net frame 152 leads to the gas liquid outlet that housing bottom is provided with by a bellows.
A specific embodiment is: as shown in Figure 4, the confined bed fluid comprises a conical fair water cone, conical fair water cone be full-closed structure and small end up, establish a gag lever post at the small end top and penetrate in the gas-liquid import in case top.Conical fair water cone outer wall is provided with elasticity exciting plate 153 sagging and that outwards scatter, and elasticity exciting plate 153 is a steel spring plate, and upper end and conical fair water cone are fixed, and the lower end is a free end.Circle tube leaching net frame 152 is the tubular constructions (as shown in Figure 5) that surround by at interior screen support gusset 154 and filter screen outside 155, is fixed on the bottom of fair water cone.
Periphery at circle tube leaching net frame 152, fix sheathed several truncated cone-shaped kuppe 156 vertically, truncated cone-shaped kuppe 156 big ends up, small end is down, leave enough gaps between small end and the circle tube leaching net frame 152, for the filter screen frame vibration produces the radial displacement slot milling; Connect several floors 157 in the side of truncated cone-shaped kuppe 156, so that the truncated cone-shaped kuppe is fixed on the housing 11.
Further, the vertical section of truncated cone-shaped kuppe 156 is one trapezoidal.
In the sealing of the bottom of circle tube leaching net frame 152 and an outlet is arranged, outlet connects a bellows 17, and bellows 17 leads to gas liquid outlet 13.
Further, also be equiped with filler pipe 18, in sand collecting chamber 16, feed hot water in good time by the valve of operating on it in the side of sand collecting chamber 16, the one, in order to wash the greasy dirt in the sand, the 2nd, pile up more for a long time when sand, help sediment outflow.
The working method of heterogeneous exciting desander 10 is: gas-liquid mixture (containing the sand flow body) flows to long inlet standpipe 12, in the pipeline section that rises, form slug flow (slug flow is made of liquid plug and vent plug), when liquid enters the desander top, unrestrained downwards through conical fair water cone 151, impact elasticity exciting plate 153, make it produce the upper and lower elastic displacement of pointing to housing 11 axis, when subsequently vent plug arrives, when liquid plug impulsive force is removed, elasticity exciting plate 153 returns to original position under the elastic force effect of steel spring plate.Because of slug flow is that a kind of periodicity liquid plug with certain frequency impacts mobile, elasticity exciting plate 153 presents displacement and the periodic vibration state that resets under this impact mobilization, thereby drive the circle tube leaching net frame 152 that is attached thereto together and produce periodic vibration, the gas-liquid medium passes filter screen and enters into the net inboard, and be pooled to the bellows 17 of circle tube leaching net frame 152 bottoms, discharge through gas liquid outlet 13; Sand in the fluid is intercepted at the outside of filter screen, under the acting in conjunction of gravity and 152 vibrations of circle tube leaching net frame, sink in the sand collecting chamber 16 of circle tube leaching net frame 152 bottoms, thereby avoided pressing the damage of collapsing by the filter screen frame that filter screen stops up, the pressure drop increase causes.Open the valve of sand removing hole 14, can sand is online (refer under the normal operating conditions of desander, rather than under the end-of-life state; Sediment outflow is intermittently, and is periodic) discharge.
Sand in sand collecting chamber 16 runs up near bellows 17 lower edge, when needing sediment outflow, open the valve of filler pipe 18 earlier, in sand collecting chamber 16, feed hot water, greasy dirt in the flushing sand, the greasy dirt that washes out swims in hot water top and the filter screen that covers sand collecting chamber 16 and then pass circle tube leaching net frame 152 is pooled to bellows 17 with the gas-liquid medium and discharges through gas liquid outlet 13, the oil gas water blending agent of discharging enters oil-gas mixed delivery pump group 40, after the washed-out sand operation is finished, open the valve of sand removing hole 14 again, sediment outflow.
The heterogeneous exciting desander 10 of the present invention, by the long-pending sand of on-line cleaning and through the short distance discharge of pipes in outdoor sand-transport truck, avoided solid particle to stop up filter screen.Heterogeneous exciting desander 10 is removed the sand or like solid in the gas mixture, has also slowed down mixing the wearing and tearing of defeated pump.The engineering application result shows, after using the heterogeneous exciting desander of the present invention, the replacement cycle of filter screen frame reached more than 2 years, had prolonged more than 2 times than the conventional filtration device in single pump intake setting, and realized online desanding, collection sand, washed-out sand and sediment outflow, arrived safety and environmental protection operation requirement.
In an optional application example, heterogeneous exciting desander 10 is at gs-oil separator and advances the desanding device of setting up between the pump header, asks comparison diagram 1 and Fig. 2; In another optional application example, as shown in Figure 3, the gas liquid outlet of heterogeneous exciting desander 10 can be connected with a flow-harmonization device 80 earlier, and the outlet of flow-harmonization device 80 links to each other with a plurality of oil-gas mixed delivery pumps of parallel connection again.One oil gas fluid-mixing oil gas fluid-mixing of being divided into some strand identical gas-liquid flows enters and mixes defeated pump group like this, can guarantee the inlet void fraction unanimity of each pump in the defeated pump group of mixing of parallel running, avoid the generation of bias current, eliminate by the inlet void fraction defeated pump screw rod that mixes that causes that transfinites and cross thermal wear and operation troubles.
In other application example, the heterogeneous exciting desander of the present invention can also be extended in the conveying and process for purifying equipment of similar sand-laden fluid stream.
The various embodiments described above only are used to illustrate the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (10)
1. heterogeneous exciting desander, it is characterized in that: it comprises a vertical desander housing, is provided with the gas-liquid import and connects an inlet standpipe in described case top; In described housing filter screen frame is housed, the vessel space of described filter screen frame bottom is a sand collecting chamber, and the bottom of described sand collecting chamber is provided with sand removing hole;
Described filter screen frame top is the confined bed fluid, and the bottom is the circle tube leaching net frame, and described confined bed fluid and described circle tube leaching net frame are connected as a single entity, and described confined bed fluid lateral wall is provided with elasticity exciting plate sagging and that outwards scatter; Described circle tube leaching net frame bottom outlet connects a bellows, leads to the gas liquid outlet that described housing bottom is provided with.
2. heterogeneous exciting desander according to claim 1 is characterized in that: described inlet standpipe is formed by inverted U-shaped section and vertical section, described inverted U-shaped section gas-liquid import that is connected in case top, and vertically section is connected in the oil and gas multiphase flow pipeline.
3. heterogeneous exciting desander according to claim 1 and 2, it is characterized in that: described confined bed fluid is a conical fair water cone, the small end of described fair water cone is relative with the import of described case top, described fair water cone outer wall is provided with described elasticity exciting plate, described elasticity exciting plate upper end is fixed with conical fair water cone, and the lower end is a free end.
4. according to claim 1 or 2 or 3 described heterogeneous exciting desanders, it is characterized in that: described elasticity exciting plate is a steel spring plate.
5. according to the arbitrary described heterogeneous exciting desander of claim 1 to 4, it is characterized in that: a gag lever post is arranged at described confined bed fluid top, and clearance-type is inserted in the gas-liquid import of described case top.
6. according to the arbitrary described heterogeneous exciting desander of claim 1 to 5, it is characterized in that: in the periphery of described circle tube leaching net frame, fix sheathed several truncated cone-shaped kuppe vertically, the big end of described truncated cone-shaped kuppe up, small end and described circle tube leaching net frame outer wall have certain clearance; Between the side of described truncated cone-shaped kuppe and desander housing, be connected several floors.
7. according to the arbitrary described heterogeneous exciting desander of claim 1 to 6, it is characterized in that: the side in described sand collecting chamber also is equiped with filler pipe, leads to described sand collecting chamber.
8. desanding method that contains the sand flow body, it is characterized in that: use the arbitrary described heterogeneous exciting desander of claim 1 to 7, contain the sand flow body and flow into from described inlet standpipe, the gas-liquid medium is discharged through described gas liquid outlet in the fluid, and the sand in the fluid is discharged by the sand removing hole of sand collecting chamber.
9. the described according to Claim 8 desanding method that contains the sand flow body, it is characterized in that, comprise following process: contain the sand flow body and flow to the inlet standpipe, in the pipeline section that rises, form slug flow, slug flow is unrestrained downwards through conical fair water cone, impact elasticity exciting plate make its produce to point to the housing axis on, following elastic displacement, and the periodic vibration that under the elastic force effect of steel spring plate, resets, the circle tube leaching net frame that drive is attached thereto together produces periodic vibration, contain in the sand flow body gas-liquid medium and pass filter screen to enter into net inboard and be pooled to bellows, discharge through gas liquid outlet; Contain the outside that sand in the sand flow body is intercepted at filter screen, under the acting in conjunction of gravity and the vibration of circle tube leaching net frame, sink in sand collecting chamber, sand is discharged by sand removing hole.
10. according to the described desanding method that contains the sand flow body of claim 9, it is characterized in that: during sediment outflow, the valve of opening filler pipe earlier feeds hot water in sand collecting chamber, the greasy dirt of flushing in the sand, the greasy dirt that washes out swim in hot water top and the filter screen that covers sand collecting chamber and then pass the circle tube leaching net frame is pooled to bellows with the gas-liquid medium and discharges through gas liquid outlet; After the washed-out sand operation is finished, open the valve sediment outflow of sand removing hole again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189958.5A CN103223277B (en) | 2012-05-21 | 2013-05-21 | Multiphase shock excitation sand remover and sand removing method of sand-containing fluid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101586143 | 2012-05-21 | ||
| CN201210158614 | 2012-05-21 | ||
| CN201210158614.3 | 2012-05-21 | ||
| CN201310189958.5A CN103223277B (en) | 2012-05-21 | 2013-05-21 | Multiphase shock excitation sand remover and sand removing method of sand-containing fluid |
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| CN103223277A true CN103223277A (en) | 2013-07-31 |
| CN103223277B CN103223277B (en) | 2015-06-10 |
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| CN201310189036.4A Active CN103242924B (en) | 2012-05-21 | 2013-05-21 | Tubular oil-gas separator and oil-gas separation method |
| CN201310190122.7A Active CN103244824B (en) | 2012-05-21 | 2013-05-21 | Pressurizing heating oil gas mixing transportation system and method |
| CN201310189958.5A Active CN103223277B (en) | 2012-05-21 | 2013-05-21 | Multiphase shock excitation sand remover and sand removing method of sand-containing fluid |
| CN2013202802968U Expired - Lifetime CN203303695U (en) | 2012-05-21 | 2013-05-21 | Oil-gas mixture transportation separation flow divider |
| CN201310190254.XA Active CN103239894B (en) | 2012-05-21 | 2013-05-21 | Oil-gas mixed transportation separating flow divider and oil-gas separating flow-dividing method |
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| CN201310189036.4A Active CN103242924B (en) | 2012-05-21 | 2013-05-21 | Tubular oil-gas separator and oil-gas separation method |
| CN201310190122.7A Active CN103244824B (en) | 2012-05-21 | 2013-05-21 | Pressurizing heating oil gas mixing transportation system and method |
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| CN201310190254.XA Active CN103239894B (en) | 2012-05-21 | 2013-05-21 | Oil-gas mixed transportation separating flow divider and oil-gas separating flow-dividing method |
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| CN110318711B (en) * | 2019-07-11 | 2023-06-30 | 河南柴油机重工有限责任公司 | Liquid draining method and device for liquid-containing low-yield oil-gas well |
| CN110656912A (en) * | 2019-09-24 | 2020-01-07 | 中国石油天然气股份有限公司 | Oil field ground gathering and transferring system and gathering and transferring method |
| CN113105925B (en) * | 2020-01-13 | 2022-02-01 | 中国石油天然气股份有限公司 | Natural gas desanding device and method |
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- 2013-05-21 CN CN201310189036.4A patent/CN103242924B/en active Active
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- 2013-05-21 CN CN201310189958.5A patent/CN103223277B/en active Active
- 2013-05-21 CN CN2013202802968U patent/CN203303695U/en not_active Expired - Lifetime
- 2013-05-21 CN CN201310190254.XA patent/CN103239894B/en active Active
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| CN200984478Y (en) * | 2006-11-29 | 2007-12-05 | 中国海洋石油总公司 | Rotational flow type fine purification apparatus |
| CN201410335Y (en) * | 2009-05-15 | 2010-02-24 | 大连冷星企业有限公司 | Sand remover |
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| CN202012312U (en) * | 2011-04-27 | 2011-10-19 | 沧州市华沧石油机械厂 | Desander |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103239894A (en) | 2013-08-14 |
| CN103244824A (en) | 2013-08-14 |
| CN203303695U (en) | 2013-11-27 |
| CN103244824B (en) | 2015-06-03 |
| CN103239894B (en) | 2015-05-13 |
| CN103242924A (en) | 2013-08-14 |
| CN103242924B (en) | 2015-03-04 |
| CN103223277B (en) | 2015-06-10 |
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