CN205349306U - Circulating sand liquid recovery system - Google Patents
Circulating sand liquid recovery system Download PDFInfo
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- CN205349306U CN205349306U CN201520974559.4U CN201520974559U CN205349306U CN 205349306 U CN205349306 U CN 205349306U CN 201520974559 U CN201520974559 U CN 201520974559U CN 205349306 U CN205349306 U CN 205349306U
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Abstract
The utility model relates to a circulating sand liquid recovery system includes a fracturing set of cars and sand liquid buffer tank at least, the import at top of sand liquid buffer tank pass through the pipeline and be connected with the leakage fluid dram of well head, the bottom export of this sand liquid buffer tank is connected with a tee bend through the valve, this three -way one end is connected with a shale shaker through the sand pump, the exit linkage of this shale shaker has one to store up the sand jar, the three -way other end be connected with the sail manifold through first valve, should sail upstream the manifold through last time the pump be connected with a mixing sand tank, the export of this mixing sand tank and the entry linkage of the fracturing set of cars, the export of the fracturing set of cars is passed through the pipeline and is connected with the inlet of well head, with the grit retrieval and utilization that returns out in the sandblast perforation to the stratum in, the use of greatly reduced cost, and avoided processing link and expense to retrieving liquid and grit in sandblast perforation process for the production progress alleviates the pressure of fracturing to the environmental protection.
Description
Technical field
This utility model relates to the fracturing fluid in oilfield prospecting developing field and reclaims field, is specifically related to a kind of circulating sand liquid recovery system.
Background technology
Pressing crack construction is the main technique renovation technique of low permeability oil and gas field, and hydraulic jet perforation is the early stage operation of fracturing, and hydraulic jet perforation returns out substantial amounts of liquid and sand, is all emitted in the blowdown hole in well site；Strict enforcement along with environmental law, it is impossible to be emitted on ground, must carry out recycling recycling；Horizontal well, when pressing crack construction, will carry out hydraulic jet perforation, and the sand amount required for each layer is about 5-6 side, operational discharge capacity be about 2-3 side/point；When every mouthful of well needs water-jet about 10 layers, adding the sand that open flow returns out, after construction, each perforated interval need to spray liquid and be about 100 sides, and sand is about 50 sides；Changqing oilfields is constructed about 600 mouthfuls of water horizontal wells every year, it is necessary to reclaim and the amount of fluid that utilizes is: 600 × 100 × 10=600000 side；The sand being emitted on well site every year is about: 600 × 50=30000 side；Recycling after processing to the sand that horizontal well is returned out and liquid measure, it it is 200 yuan by the cost processing 1 side's water, the solid that expense the is 300 yuan expense thing processing 1 side's sand is calculated, and required direct cost expense is about: 600000 × 200+30000 × 300=1.29 hundred million yuan.If consideration factory site, process equipment and freight, then solid-liquid handling is about more than 200,000,000 yuan.
Utility model content
For the shortcoming overcoming above-mentioned prior art, the purpose of this utility model is in that to provide a kind of circulation hydraulic injection, and the sand returned out in abrasive perforating is back to use in stratum, it is substantially reduced the use of cost, and avoid in abrasive perforating operation the processing links of withdrawal liquid and sand and expense, accelerate manufacturing schedule, alleviate the pressing crack construction circulating sand liquid recovery system to the pressure of environmental protection.
In order to achieve the above object, the technical scheme that this utility model is taked is: a kind of circulating sand liquid recovery system, at least include a fracturing unit truck group and sand liquid surge tank, the import at the top of described sand liquid surge tank is connected with the leakage fluid dram of well head by pipeline, the outlet at bottom of this sand liquid surge tank is connected to a threeway by valve, one end of this threeway is connected to a vibrosieve by sand pump, the outlet of this vibrosieve is connected to a sand tank, the other end of described threeway is connected to upper hose by the first valve and converges, this upper hose Correspondent is crossed last time pump and is connected to a mixing sand tank, the outlet of this mixing sand tank is connected with the entrance of fracturing unit truck group, the outlet of described fracturing unit truck group is connected with the inlet of well head by pipeline.
Described sand liquid surge tank upper outlet is connected to a big tank of liquid storage by the second valve.
Described sand liquid surge tank is capitate sand liquid surge tank, and this capitate sand liquid surge tank is divided into upper conical tank body, main tank body and inferior pyramidal tank body from top to bottom.
The diameter of described main tank body is 1200mm, is highly 800mm.
Described upper conical tank body height is 250mm.
The height of described inferior pyramidal tank body is 1000mm.
This utility model adopts above technical scheme, have the following advantages, the sand returned out in abrasive perforating is back to use in stratum, it is substantially reduced the use of cost, and avoid in abrasive perforating operation the processing links of withdrawal liquid and sand and expense, accelerate manufacturing schedule, alleviate the pressing crack construction pressure to environmental protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is this open flow sand liquid recovery structure schematic diagram；
Fig. 3 is the structural representation of sand liquid surge tank；
In figure: 1. well head；2. fracturing unit truck group；3. mixing sand tank；4. charging pump；5. upper hose converges；6. the big tank of liquid storage；7. the second valve；8. sand liquid surge tank；9. sand pump；10. the second valve；11. vibrosieve；12. sand tank；801. upper conical tank body；802. main tank body；803. inferior pyramidal tank body.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in detail.
Embodiment 1
In horizontal well construction process, being proved by the on-the-spot substantial amounts of recovery sand of sand removing tank, the sand that water-jet is returned out, be broken sand only less than 1/3, other is still complete fracturing sand；Being confirmed that by correlational study the erosion of tube wall be there is no impact by sand grains diameter, its main influence factor is the flow velocity of injection liquid, it is desirable to injection flow velocity reaches 120 meter per seconds；When introducing hydraulic jet perforation technology, it is simply that adopt the flour sand of more than 70 orders to carry out abrasive perforating, only because domestic not relevant supporting flour sand, in the process of popularization and application, in order to draw materials conveniently, have employed conventional fracturing sand and carry out hydraulic jet perforation.So, the fracturing sand returned out after perforation still can repeat perforation, recycling.
By Oil/gas Well open flow for many years it can be seen that the sand that fracturing fluid returns out from stratum is flour sand substantially entirely, the broken sand grains diameter that hydraulic jet perforation is returned out, the sand grains diameter that after being still greater than pressure, stratum is returned out；External pressing crack construction processes thing also without discarded sand；It addition, flour sand uses frequently as the sinking agent in pressing crack construction, it is simple to press off new crack or stifled old seam；So, it is possible to stratum is returned shake out and water-jet sand all inject stratum, the production capacity on stratum is not had big impact.
The circulating sand liquid recovery system of one as shown in Figure 1, at least include a fracturing unit truck group 2 and sand liquid surge tank 8, the import at the top of described sand liquid surge tank 8 is connected with the leakage fluid dram of well head 1 by pipeline, the outlet at bottom of this sand liquid surge tank 8 is connected to a threeway 13 by valve, one end of this threeway 13 is connected to a vibrosieve 11 by sand pump 9, the outlet of this vibrosieve 11 is connected to a sand tank 12, the other end of described threeway 13 is connected to upper hose by the first valve 10 and converges 5, this upper hose converges and 54 is connected to a mixing sand tank 3 by pump last time, the outlet of this mixing sand tank 3 is connected with the entrance of fracturing unit truck group 2, the outlet of described fracturing unit truck group 2 is connected by the inlet of pipeline with well head 1.
In work process, sand liquid in well is pumped in well head 1 by fracturing unit truck group 2, enter in sand liquid surge tank 8 at the sand liquid after well internal recycle, in sand liquid surge tank 8 in part through upper hose converge 5 and charging pump 4 enter in mixing sand tank 3, the sand liquid entered in mixing sand tank 3 is entering in well head 1 through fracturing unit truck group 2, realize the recycling of sand liquid, another part sand liquid in sand liquid surge tank 8 enters in vibrosieve 11 by sand pump 9, it is easily separated through vibrosieve 11, sand grains after separation is stored in sand tank 12 and stores, the construction that the sand grains of this storage is later needs to prepare, realize re-using sand grains, terminate an agreement construction cost, and prevent the environment to periphery of the sand liquid after open flow.
Embodiment 2
On the basis of embodiment 1, a kind of circulating sand liquid recovery system, at least include a fracturing unit truck group 2 and sand liquid surge tank 8, the import at the top of described sand liquid surge tank 8 is connected with the leakage fluid dram of well head 1 by pipeline, the outlet at bottom of this sand liquid surge tank 8 is connected to a threeway 13 by valve, one end of this threeway 13 is connected to a vibrosieve 11 by sand pump 9, the outlet of this vibrosieve 11 is connected to a sand tank 12, the other end of described threeway 13 is connected to upper hose by the first valve 10 and converges 5, this upper hose converges and 54 is connected to a mixing sand tank 3 by pump last time, the outlet of this mixing sand tank 3 is connected with the entrance of fracturing unit truck group 2, described sand liquid surge tank 8 upper outlet is connected to a big tank 6 of liquid storage by the second valve 7；The outlet of described fracturing unit truck group 2 is connected by the inlet of pipeline with well head 1.
The sand liquid separation buffer tank 8 that the nucleus equipment of this system is, an import is arranged at its top, an outlet；One outlet is arranged at bottom, and this exit is connected to a threeway 13.One end of this threeway 13 is connected to sand pump 9, it is possible to is transported in vibrosieve 11 by the sand liquid in sand liquid surge tank 8, is separated by sand；The other end of threeway 13 is directly connected with upper hose remittance 5 and charging pump 4, it is possible to directly sucks in mixing sand tank 3 by sand liquid, supplies fracturing unit truck group 2, be circulated water-jet.The liquid outlet on its top of sand liquid surge tank 8 is connected with the big tank 6 of liquid storage, if in hydraulic jet perforation process, after blood circulation adds a certain amount of sand, when the sand liquid measure making blood circulation exceedes sand liquid surge tank 8, the liquid having more in system can overflow from top, flowed in the big tank 6 of liquid storage by pipeline, play cushioning effect；
When open flow after pressing, this sand liquid surge tank 8 can use as a hydrocyclone, by cyclonic separation effect, sand liquid is made to be easily separated, neat liquid is flowed among the big tank 6 of liquid storage by the valve of cyclone apex, isolated sand is deposited in the bottom of separator, now, sand pump 9 can be opened and provide sand liquid to vibrosieve 11, the sand gone out by open flow is separated, and is stored in the middle of a sand tank 12, during normal pressure break, it is easy to the fracturing sand supply blend tank that will reclaim, then is pressed in well.
Embodiment 3
On the basis of embodiment 1 or 2, as shown in Figure 3 in order in order to meet hydraulic jet perforation construction technology flow be 2-3 side/point, more than nozzle flow velocity >=120 meter per second, containing sand than the construction parameter reaching within 5%, the making parameter of this sand liquid surge tank 8 is as follows.Described sand liquid surge tank 8 is capitate sand liquid surge tank, and this capitate sand liquid surge tank is divided into upper conical tank body 801, main tank body 802 and inferior pyramidal tank body 803 from top to bottom；
Main tank body 802 diameter: d=1200mm
Diameter Ф=150mm imported and exported by sand liquid surge tank 8
Sand liquid surge tank 8 outlet height: h1=100mm
Upper conical tank body 801 height h2=250mm
Main tank body 802 height h3=800
Inferior pyramidal tank body 803 height h4=1000mm
Height overall 2150mm
Wall thickness: adopt the steel plate of more than 5mm to manufacture, it is simple to improve service life and the bearing capacity of this tank.
This tank volume calculating=epicone volume+main tank volume+lower cone, the long-pending computing formula of unit's stage body is V=1/3 π h (R^2+2rR+r^2)
Main tank volume: 1.22*3.14*0.8/4=0.9m3
Upper cone: 1/3*3.14*0.25(0.62+2*0.6*0.075+0.0752)=0.12m3
Lower cone: 1/3*3.14*1(0.62+2*0.6*.075+0.0752)=0.48m3
Cumulative volume: 0.9+0.12+0.48=1.5m3
Lower cone angle: σ=arctg (600/1000)=30.9 °
Its volume of design above parameter has reached the volume of mixing sand tank, matches with mixing sand tank, and its angle of taper has reached the separation cone angle of Swirling flow sand-removing, should be suitable for the application at scene.
Vibrosieve and sand liquid surge tank 8 and sand pump are assembled into a skid structure, it is simple to transport uses with joint connection in site.
The volume of storage tank is not more than 10m3
Height overall is not more than 2400mm
Vibrosieve 11 parameter:
Compass screen surface: 2m2
Feeding granularity: 0.01mm
Treating capacity: 0.5m3
Power of motor: 2.5Kw
Sand pump 9 parameter
Flow: 5m3/min
Pump pressure: 0.2MPa
Rated power: 22.5Kw
Import and export diameter: 125mm.
Embodiment 4
A kind of water-jet formula sand liquid recovery method, carries out according to following steps:
1), being carried out in construction well, what the pipeline of sand liquid surge tank 8 top inlet was connected on well head as shown in Figure 1 returns on draining valve, is connected on the inlet valve of well head 1 through the pipeline of fracturing unit truck group 2 outlet；
2), by completely liquid upper in mixing sand tank 3, opening fracturing unit truck group 2, the liquid in mixing sand tank 3 is pumped in the perforation in well by fracturing unit truck group 2 with the flow of≤500L/min, enters into the liquid circulation in perforation and enters into sand liquid surge tank 8；
3), in the process of circulation, when the liquid in mixing sand tank 3 with sand liquid surge tank 8 respectively reaches the 70% of mixing sand tank 3 and sand liquid surge tank 8 tank body volume, will go into the flow of perforation and bring up to 2-3m3/ min, operation pressure brings up to 40-50MPa；
4), on the basis of step 3), after mixing sand tank 3 and sand liquid surge tank 8 liquid level are steady, sand ratio according to the time of injection, flow and 3-5% determines sand feeding amount, and the sand amount determined is added to mixing sand tank 3, by fracturing unit truck group 2, the mixing liquid adding sand grains in mixing sand tank 3 is pumped in perforation；
5), sprayed after, that closes well head 1 returns draining valve, stops continuing to pump into mixing liquid in perforation in well, carrying out pressure break, if after pressing off bottom, and construction is normal, then carry out pressure break flow process and carry out pressure break, if not pressing off stratum, it is impossible to carry out follow-up pressing crack construction, open and return draining valve, fracturing fluid in well enters into sand liquid surge tank 8, and carries out sand liquid separation by sand liquid surge tank 8, and repeats step 1)-4) until when carrying out pressure break, press off stratum, it is possible to till carrying out pressure break.
Concrete carries out in accordance with the following methods:
1. first have to clean up in construction well, reach detail design requirement.
2. allow full liquid on mixing sand tank 3, start fracturing unit truck group pump and make perforation liquid start the cycle over the flow of≤500L/min；
3., in cyclic process, mixing sand tank 3 is made to respectively reach about 70% with the liquid in sand liquid surge tank 8；
4. improving injection flow and reach construction requirement, its flow is 2-3m3/ min, operation pressure is about 40-50MPa；
5. when circulation is normal, after mixing sand tank 3 is steady with liquid level in sand liquid surge tank 8, in mixing sand tank 3, sand can be added by the sand ratio of 3-5%；
6. the volume according to well, injection flow, injection required time about 10 minutes, it is determined that sand feeding amount；As, injecting time is 10 minutes, and construction flow is 2.5m3/ min, required sand amount is: 10 × 2.5 × 5%=1.25m3；
If the 7. circulation volume >=25m of well3, then the maximum sand feeding amount of water-jet is about 1.25m3；
If 8. the circulation volume of well is less than the sand liquid measure needed for spraying cycle, then calculate, with the volume of well and injection gravelfluid ratiometer, the sand amount added；As, the circulation volume in well is 12m3, the addition of its injection sand is: 12 × 5%=0.6m3；
9. after injection completes, closing sleeve valve and carry out normal pressure break, if after pressing off stratum, construction is normal, then switch and carry out pressure break for normal pressure break flow process；
If it is abnormal 10. to construct, pressure is higher than more than 50MPa, then recycle outside well by the sand liquid in well, after being separated by sand by sand liquid/gas separator, is again with prolongation time abrasive perforating, or adopts acid solution pretreating process.
Embodiment 5
Open flow liquid recovery method after a kind of pressure, carries out according to following steps:
I. closing well 1-2 hour, allow strata pressure be diffused, when the pressure of well head 1 is higher than 20MPa, the oil that the pipeline of sand liquid surge tank 8 top inlet is connected on well head as shown in Figure 2 is put on valve；
II. open oil and put valve, returning discharge opeing and will return discharge opeing when borehole pressure and be pressed onto in sand liquid surge tank 8 in well；
III. opening sand liquid surge tank 8 and export the second valve 7 being connected with the big tank 6 of liquid storage, the fracturing fluid in sand liquid surge tank 8 enters in the big tank 6 of liquid storage；
IV. when sand liquid surge tank 8 is 10m for liquid3After, to open the valve bottom sand liquid surge tank 8, be pumped in vibrosieve 11 carry out sand liquid separation by sand pump 9 well sand liquid, the sand grains after separation is stored in sand tank 12, until open flow terminates；
Concrete:
(1) closing well is after 1-2 hour, allows strata pressure spread；
(2) when well head pressure is higher than 20MPa, reducing pressure by regulating flow manifold to be adopted to carry out open flow, it is prevented that high speed sand liquid thorn bad relief line, cause environmental pollution；
(3) open flow flow-control is at 1m3Within/min, it is strictly on guard against in well and shakes out in a large number；
(4) every open flow goes out 10m3After liquid, sand liquid in vibrosieve is allowed to be easily separated out sand, it is prevented that the sand face in knockout drum is too high, and sand liquid separating effect is bad, allows sand be deposited in fluid reservoir；
(5) to allow the isolated sand of vibrosieve, exist among fortune sand tank by conveyer belt, after construction is normal, it is possible to allow and return out sand and add in the middle of stratum；
(6) horizontal well final stage reclaims sand and liquid can use to end opening horizontal well in roping, in order to avoid being emitted on well site, to environment.
The risk that above-described embodiment 4 and embodiment 5 exist is as follows with preventive measure:
| Sequence number | Existing problems | Preventive measure |
| 1 | The flour sand impact on productivity of hydrocarbon | Cooperated with oil gas institute pressure break, production capacity after lamination similarly is analyzed, it is determined that influence degree is little, the feasibility of environmental conservation can be reached. |
| 2 | During new wellsite applications, the non-well-flushing of pit shaft, lower step cannot be constructed | Adopt well-flushing to process car or drilling well desilter, after carrying out well-flushing, carry out pressing crack construction. |
| 3 | Flour sand is deposited in the remittance of fracturing blender truck upper hose, affects valve and opens and upper liquid efficiency. | In whole water-jet process, solution feed pump does not stop, and adjusts rotating speed and flow according to mixing sand tank liquid level； |
| 4 | After water-jet adds sand, there is the tank that overflows in blend tank, and liquid banishes well site； | Adopting sand liquid surge tank to solve, surge tank retains certain space, and when adding sand in blood circulation, leaving liquid increases space, makes blend tank not spill over. |
| 5 | Reclaim sand liquid and affect water efficiency and service life on suction pump. | Change the suction pump of fracturing blender truck into sand pump, it is ensured that its service life. |
| 6 | If sand face is too high in separator, by sediment transport pump seizure. | Can install in separator one vertical, diameter is at 50mm mozzle, when reaching sediment outflow, makes sand liquid with going out, it is prevented that sand pump is stuck. |
| 7 | Vibrosieve is returned out on sand less than in storage tank. | Sand vibrosieve selected is loaded among sand tank by conveyer belt. |
| 8 | Damp sand can not be transported to mixing sand tank by sand feeder of sand blender. | Conveyer belt is adopted to be sent to mixing sand tank or adopt the conveying of wind feed technique. |
| 7 | The flour sand impact on perforating quality | The percentage of damage of each sand is up to 30%, when again circulating, can add 30% and reach requirement. |
| 9 | Last layer returns to shake out can leave over well site, contaminated environment. | Sand is stored in sand tank, is pulled to new well site and uses. |
| 10 | During hydraulic jet perforation, easily sting bad well head needle-valve | Adopt Anti-erosion reducing pressure by regulating flow manifold. |
Exemplified as above is only to illustration of the present utility model, is not intended that the restriction to protection domain of the present utility model, every belongs within protection domain of the present utility model with the same or analogous design of this utility model.
Claims (6)
1. a circulating sand liquid recovery system, it is characterized in that, at least include a fracturing unit truck group (2) and sand liquid surge tank (8), the import at the top of described sand liquid surge tank (8) is connected with the leakage fluid dram of well head (1) by pipeline, the outlet at bottom of this sand liquid surge tank (8) is connected to a threeway (13) by valve, one end of this threeway (13) is connected to a vibrosieve (11) by sand pump (9), the outlet of this vibrosieve (11) is connected to a sand tank (12), the other end of described threeway (13) is connected to upper hose remittance (5) by the first valve (10), this upper hose remittance (5) is connected to a mixing sand tank (3) by pump last time (4), the outlet of this mixing sand tank (3) is connected with the entrance of fracturing unit truck group (2), the outlet of described fracturing unit truck group (2) is connected by the inlet of pipeline with well head (1).
2. the circulating sand liquid recovery system of one according to claim 1, it is characterised in that described sand liquid surge tank (8) upper outlet is connected to the big tank of a liquid storage (6) by the second valve (7).
3. the circulating sand liquid recovery system of one according to claim 1, it is characterized in that, described sand liquid surge tank (8) is capitate sand liquid surge tank, and this capitate sand liquid surge tank is divided into upper conical tank body (801), main tank body (802) and inferior pyramidal tank body (803) from top to bottom.
4. the circulating sand liquid recovery system of one according to claim 3, it is characterised in that the diameter of described main tank body (802) is 1200mm, is highly 800mm.
5. the circulating sand liquid recovery system of one according to claim 3, it is characterised in that described upper conical tank body (801) is highly 250mm.
6. the circulating sand liquid recovery system of one according to claim 3, it is characterised in that the height of described inferior pyramidal tank body (803) is 1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974559.4U CN205349306U (en) | 2015-12-01 | 2015-12-01 | Circulating sand liquid recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974559.4U CN205349306U (en) | 2015-12-01 | 2015-12-01 | Circulating sand liquid recovery system |
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| CN205349306U true CN205349306U (en) | 2016-06-29 |
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| CN201520974559.4U Expired - Fee Related CN205349306U (en) | 2015-12-01 | 2015-12-01 | Circulating sand liquid recovery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386747A (en) * | 2015-12-01 | 2016-03-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Circulating sand-liquid recovery system and recovery method |
| CN107377201A (en) * | 2017-08-31 | 2017-11-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of perforation returns sediment outflow retracting device and method |
-
2015
- 2015-12-01 CN CN201520974559.4U patent/CN205349306U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386747A (en) * | 2015-12-01 | 2016-03-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Circulating sand-liquid recovery system and recovery method |
| CN105386747B (en) * | 2015-12-01 | 2018-07-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of circulating sand liquid recovery system and recovery method |
| CN107377201A (en) * | 2017-08-31 | 2017-11-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of perforation returns sediment outflow retracting device and method |
| CN107377201B (en) * | 2017-08-31 | 2019-06-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of perforation returns sediment outflow recyclable device and method |
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Granted publication date: 20160629 Termination date: 20211201 |