CN108457627A - A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control - Google Patents
A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control Download PDFInfo
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- CN108457627A CN108457627A CN201810176099.9A CN201810176099A CN108457627A CN 108457627 A CN108457627 A CN 108457627A CN 201810176099 A CN201810176099 A CN 201810176099A CN 108457627 A CN108457627 A CN 108457627A
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 33
- 230000000452 restraining effect Effects 0.000 title claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 223
- 239000004576 sand Substances 0.000 claims abstract description 87
- 238000011049 filling Methods 0.000 claims abstract description 47
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 239000004575 stone Substances 0.000 claims description 21
- 238000002955 isolation Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 17
- 150000004677 hydrates Chemical class 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 81
- 239000007789 gas Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012856 packing Methods 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000003306 harvesting Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- E21B43/082—Screens comprising porous materials, e.g. prepacked screens
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, the compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control includes successively from the inside to the outside：Base tube；Interior wrapping wire layer, is socketed in base tube outer surface；More grade combination filling layers are socketed in except interior wrapping wire layer, and more grade combination filling layers are three layers, and interlayer pack gravel is differed per layer thickness, and grain size of gravel between layers is different；Outer wrapping wire layer is socketed in except more grade combination filling layers；Outermost outer protective cover.Compared with existing gravel filling sand prevention and mechanical screen casing anti-sand method, the compound restraining liner of the more grades of multilayer of the invention has sand block thickness, and the term of validity is long, the advantages of capable of taking into account sand block performance and trafficability performance, keep sand block effect and oil/gas well high yield.Suitable for oil and gas and gas hydrates Extra-fine sand sand control.
Description
Technical field
The present invention relates to a kind of compound restraining liners of the more grades of multilayer suitable for Extra-fine sand sand control, belong to oil and day
Right gas and gas hydrates underground drill and petroleum extraction tools technical field.
Background technology
China and loose sand oil-gas pool distribution is extensive in the world, its reserves and yield are occupied an leading position at present.Loose sand
One of the main thorny problem that oil gas pool exploitation faces is sand production of oil-gas wells, and production equipment damage and yield is caused substantially to drop
It is low.Since the cement of reservoir rock particle is largely hydrate, lose cementation after decomposition makes gas hydrates
At largely shaking out.To the problem of shaking out of above-mentioned oil-gas reservoir, normal exploitation is required to take sand control measure；For oil and gas
Loose sand reservoir Extra-fine sand (50 μm of grade), especially (grade reaches 10-15 μ to the super Extra-fine sand of gas hydrates reservoir
M), since grain size is very small, current technology sand control is very difficult.
Mechanical sand control screen casing is the key that underground equipment in early sand control completion or final sand-proofing, and in shaft bottom, face produces layer
The mechanical screen casing of position suspension, screen casing allows fluid from but can stop reservoir sand, to reach the mesh for preventing reservoir sand from entering pit shaft
's.Mechanical screen casing anti-sand process technology is simple, easy for construction, but that there are sand block layers is thin, Extra-fine sand is easy intrusion and blocks drop production, has
The shortcomings of effect phase is short, be unsuitable for Extra-fine sand, the serious and shale content that is unsuitable for shaking out higher situation.Gravel filling is common
Sand control completion technology refers to playing the role of sand block in the annular pack quartz sand or haydite of mechanical screen casing and casing or pit shaft.Gravel
Stone filling anti-sand effect is preferable, but exist complicated, the of high cost, filling layer of designing and constructing it is unstable it is easy cave in unstability the problems such as.
Current existing pre-fill sand prevention screen casing is the filling simple grain grade quartz sand between two layers of slot or wrapping wire, will be independent
Mechanical screen casing combines sand control with gravel filling, but still has the following problems：
(1) single layer simple grain grade fills, and Gravel packing is single, and reservoir sand is easy intrusion and blocks drop production；
(2) gravel preliminary filling packing course is relatively thin, and sand block effect is poor, and the term of validity is short；
(3) selection and design of Gravel packing are difficult to take into account sand block effect and maintain high circulation, it is difficult to meet Extra-fine sand
With super Extra-fine sand sand control demand.
Chinese patent literature CN101403289 discloses a kind of sand-proof pipe of the dedicated gravel pre-filling of oil exploitation, packet
Base tube is included, the sand control pipe shell being sleeved on outside the base tube is filled with gravel between the base tube and the sand control pipe shell
Rock layers are equipped with several deflector holes on the tube wall of the base tube and the tube wall of the sand control pipe shell.Due to pre-filled at this
The presence of the sand-proof pipe boulderet rock layers of gravel has good sand block effect.Stereo structure shell can change fluid flow patterns with
Direction prevents shell from blocking.High flow conductivity base tube can ensure by the fine sand of gravel layer can by base tube output, though
The right sand-proof pipe has high flow conductivity, but for oil and gas loose sand reservoir Extra-fine sand (50 μm of grade), especially
It is the super Extra-fine sand of gas hydrates reservoir (grade reaches 10-15 μm), it is difficult to meet Extra-fine sand and super Extra-fine sand sand control need
It asks.
Therefore, research and development take into account sand block and trafficability performance, keep sand block effect and oil/gas well high yield, and it is thin to be suitable for powder
The new type of sand prevention tool of sand and super Extra-fine sand sand control becomes what conventional petroleum was developed with natural gas and natural gas hydrate resources
Important technical demand.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of compound preliminary filling of the more grades of multilayer suitable for Extra-fine sand sand control
Screen casing is filled out, the compound restraining liner is anti-for oil and gas and gas hydrates Extra-fine sand and super Extra-fine sand
Sand, can take into account high gear grittiness can keep sand block effect and oil/gas well high yield with high trafficability performance.
Technical scheme is as follows：
A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, it is described suitable for Extra-fine sand sand control
The compound restraining liner of the more grades of multilayer includes successively from the inside to the outside：
Base tube；
Interior wrapping wire layer, is socketed in base tube outer surface；
More grade combination filling layers are socketed in except interior wrapping wire layer, and more grade combination filling layers are three layers, and interlayer fills gravel
Stone is differed per layer thickness, and grain size of gravel between layers is different；
Outer wrapping wire layer is socketed in except more grade combination filling layers；
Outermost outer protective cover；
Wherein, base tube, interior wrapping wire layer, more grade combination filling layers, outer wrapping wire layer and outer protective cover are tubulose.
Include successively from inside to outside according to currently preferred, described more grade combination filling layers：Third gravel layer,
Two gravel layers, the first gravel layer；Third gravel layer is isolated flow-guiding screen by two level with the second gravel layer and is separated, the second gravel layer with
First gravel layer is isolated flow-guiding screen by level-one and is separated.
According to currently preferred, the thickness of third gravel layer is 10mm, and the thickness of the second gravel layer is 10-15mm, the
The thickness of one gravel layer is 10-15mm.
According to currently preferred, third gravel layer cobble-stone median grain diameter is the second gravel layer cobble-stone median grain diameter
1.1-1.6 again；Second gravel layer cobble-stone median grain diameter is 1.5-2 times of the first gravel layer cobble-stone median grain diameter；First gravel
Rock layers cobble-stone median grain diameter is 6-10 times of formation median grain size.Therefore, the first gravel layer cobble-stone median grain diameter is by ground
The coefficient of uniformity of layer sand determines.
According to currently preferred, the level-one isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, and thickness is
0.8-1.2mm；Its mesh size is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
According to currently preferred, the two level isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, and thickness is
0.8-1.2mm；Its mesh size is 2/3 of minimum grain size gravel particle grain size in the second gravel layer.
According to currently preferred, the slit width of outer wrapping wire layer gap is minimum grain size gravel particle grain size in the first gravel layer
2/3.The advantages of design：To ensure blocking and the stability of gravel obturation.
According to currently preferred, the slit width of interior wrapping wire layer gap is minimum grain size gravel particle grain size in third gravel layer
2/3.
According to currently preferred, several deflector holes are evenly distributed on the tube wall of base tube, deflector hole is circle, diameter
For 8-10mm.
According to currently preferred, third gravel is laminated to be close to interior wrapping wire layer, and another side is close to two level isolation flow-guiding screen；
First gravel is laminated to be close to level-one isolation flow-guiding screen, and another side is close to outer wrapping wire layer.
The forming of the positions of the more grade combination filling layers of the present invention and more grade combination filling layers, the thickness of each layer and
Composition is that inventor obtains by numerous experiments so that it is thin that screen casing of the invention can keep off Extra-fine sand even super powder
Sand, and there is high trafficability performance, harvest efficiency, while filling layer stable structure are improved, will not cave in unstability；It is generally filled with layer
The grain size of gravel is smaller, and trafficability performance is poorer, and the present invention passes through more grade combination filling layer special constructions：Three layers of gravel layer, often
Layer thickness etc.；The size of pack gravel is from fine to coarse from outside to inside；High trafficability performance and high gear grittiness energy are reached；Different rulers
Stable sand block crane span structure can be formed between very little gravel, can play the role of outer layer sand block, and internal layer is dredged；The multilayer of the present invention
More compound restraining liners of grade before going into the well when preparing, more grade combination filling layers, and the gravel of every layer of filling different-grain diameter is filled out
Take manual compaction to ensure compaction rate after filling, due to the special construction of the present invention, between each gravel layer and gravel layer with it is interior
Structure between outer tube body ensure that more grade combination filling layer stable structure will not cave in unstability, while three layers of gravel layer, fill
Screen casing entire outer diameter after filling out is larger, is also not easy unstability of caving in compared to conventional restraining liner.
The advantages of the present invention are：
1. the compound restraining liner of the more grades of multilayer of the present invention has three layers of gravel preliminary filling packing course, differed per thick layer by layer,
And grain size of gravel between layers is different, the screen casing entire outer diameter after filling is larger, and sand block layer is thicker, and service life is long, tool
There is excellent sand block effect, Extra-fine sand (50 μm of grade) can be kept off, can especially stop the super Extra-fine sand of gas hydrates reservoir
(grade reaches 10-15 μm), sand block effect is strong, and the existing screen casing for being prefilled with gravel layer, the presence of gravel layer improve gear
Sand ability is not susceptible to block.But for there are the stratum of a large amount of fine sands, screen casing sand block layer is thin, intrusion is serious, does not have gear still
The requirement of Extra-fine sand and super Extra-fine sand, sand block effect are poor.
2. the compound restraining liner of the more grades of multilayer of the present invention has three layers of gravel packing zone, every layer by having difference
The gravel of median grain diameter fills, and avoids the shortcomings that Gravel packing is single, and reservoir sand is easy intrusion blocking.According to reservoir sand
Grain size is preferably adapted for the pack gravel of size, can form stable sand block crane span structure between various sizes of gravel, can play outer
Layer sand block, the effect that internal layer is dredged are suitable for oil and gas and gas hydrates Extra-fine sand sand control, are conducive to protect
Higher permeability is held, oil gas well production is improved.
3. the compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control of the present invention has three layers of size fractionated
Gravel packing zone, and be provided with isolation flow-guiding screen between different gravel layer, the isolation flow-guiding screen is by being covered with water conservancy diversion circular hole
Stainless steel plate mesh is made, and for different size gravel layers, the circular hole size being isolated on flow-guiding screen is also not quite similar.The isolation water conservancy diversion
The setting of net not only contributes to the stabilization for maintaining each gravel packing zone, has higher flow conductivity, and by different-grain diameter
Gravel layer is isolated, it is therefore prevented that the mixing entanglement of size fractionated gravel extends the term of validity of screen casing.
4. the compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control of the present invention, more grade combination filling layers
Position and the forming of more grade combination filling layers, the thickness of each layer and composition be that inventor's process is real many times
It tests so that screen casing of the invention can keep off Extra-fine sand even super Extra-fine sand and high trafficability performance, improve harvesting effect
Rate, while filling layer stable structure, will not cave in unstability.
Description of the drawings
Fig. 1 is the outline structural diagram of the compound restraining liner of the more grades of multilayer of the present invention；
Fig. 2 is B-B sectional views in Fig. 1；
Fig. 3 is the partial structural diagram that flow-guiding screen is isolated.
In figure, 1, base tube；2, the first gravel layer；3, the second gravel layer；4, third gravel layer；5, outer wrapping wire layer；6, level-one
Flow-guiding screen is isolated；7, flow-guiding screen is isolated in two level；8, interior wrapping wire layer；9, outer protective cover；10, deflector hole
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is further described.
Embodiment 1
A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, structure is as shown in Figure 1-Figure 3, including
Base tube 1, several deflector holes 10 are evenly distributed on the tube wall of base tube, and deflector hole 10 is circle, a diameter of 8-10mm.Base tube is
Central tube with holes plays support filling layer, ensures the effect of the inflow of fluid.
Base tube outer surface is socketed with interior wrapping wire layer 8, and more grade combination filling layers are socketed with except interior wrapping wire layer.
More grade combination filling layers include successively from inside to outside：Third gravel layer 4, the second gravel layer 3, the first gravel layer 2；
Third gravel layer 4 is isolated flow-guiding screen 7 by two level with the second gravel layer 3 and is separated, and the second gravel layer 3 passes through with the first gravel layer 1
Level-one isolation flow-guiding screen 6 separates.Third gravel layer 4, the second gravel layer 3, the first gravel layer 2, interlayer pack gravel, per layer thickness
It differs, grain size of gravel between layers is different；The size of grain size from outside to inside from fine to coarse, mainly plays sand control, maintains gravel
The effect that bed boundary is stablized；To prevent gravel layer from leaking and keeping the stability of size fractionated gravel layer.
Outer wrapping wire layer 5 is socketed except more grade combination filling layers, outer wrapping wire layer is externally provided with outer protective cover 9, outer protective cover 9
Thickness is 1mm, has the advantages that corrosion-resistant, long working life, circulation area are big.It can both play the work for preventing gravel from leaking
With, while fluid flow guiding, protection internal structure, support gravel layer can be played the role of again.Play protection sand block material, fluid is led
Flow and slow down the effect of erosion.The sealed base and head cover of sand control screen with the outer wall welded seal of base tube.
In the present invention, the thickness of third gravel layer is 10mm, and the thickness of the second gravel layer is 12mm, the first gravel layer
Thickness is 13mm.
In the present invention, third gravel layer cobble-stone median grain diameter is 1.2 times of the second gravel layer cobble-stone median grain diameter；
Second gravel layer cobble-stone median grain diameter is 1.6 times of the first gravel layer cobble-stone median grain diameter；First gravel layer boulderet stone grain
Spend 8 times that intermediate value is formation median grain size.
In the present invention, the level-one isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 1mm；Its net
Pore size is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
In the present invention, the two level isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 1mm；Its net
Pore size is 2/3 of minimum grain size gravel particle grain size in the second gravel layer.
In the present invention, the slit width of outer wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
The advantages of design：To ensure blocking and the stability of gravel obturation.
In the present invention, the slit width of interior wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in third gravel layer.
In the present invention, third gravel is laminated is close to interior wrapping wire layer, and another side is close to two level isolation flow-guiding screen；First gravel
Rock layers are close to level-one isolation flow-guiding screen on one side, and another side is close to outer wrapping wire layer.
Embodiment 2
With a kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control described in embodiment 1, difference
It is：
In the present invention, the thickness of third gravel layer is 10mm, and the thickness of the second gravel layer is 14mm, the first gravel layer
Thickness is 12mm.
In the present invention, third gravel layer cobble-stone median grain diameter is 1.5 times of the second gravel layer cobble-stone median grain diameter；
Second gravel layer cobble-stone median grain diameter is 2.0 times of the first gravel layer cobble-stone median grain diameter；First gravel layer boulderet stone grain
Spend 10 times that intermediate value is formation median grain size.
In the present invention, the level-one isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 0.8mm；Its
Mesh size is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
In the present invention, the two level isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 0.8mm；Its
Mesh size is 2/3 of minimum grain size gravel particle grain size in the second gravel layer.
In the present invention, the slit width of outer wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
The advantages of design：To ensure blocking and the stability of gravel obturation.
In the present invention, the slit width of interior wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in third gravel layer.
Comparative example 1
A kind of single layer pre-packed gravel liner, described in embodiment 1, the difference is that：
Gravel packing zone only includes one layer of gravel layer, i.e. the first gravel layer；The thickness of gravel layer and the grain for filling gravel
Diameter is the same as embodiment 1.
Comparative example 2
A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, described in embodiment 1, difference
It is：
More grade combination filling layers include successively from inside to outside：First gravel layer, the second gravel layer, third gravel layer；The
One gravel layer, the second gravel layer, third gravel layer thickness and fill gravel grain size with embodiment 1.
Comparative example 3
A kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, described in embodiment 1, difference
It is：More grade combination filling layers include successively from inside to outside：First gravel layer, third gravel layer.
Experimental example：
Experimental method：Using the microcosmic displacement simulation experimental provision of gravel layer evaluating characteristics, then commented using reservoir sand displacement
Valence properties.When experiment, after setting the flow of requirement and taking the conditions such as sand concentration, artificially gravel layer compacting is filled to and is filled out
In sandpipe；First clear water is used to carry simulated formation sand long-time displacement gravel layer, measures pressure difference and the experiment of gravel layer both sides
Pressure and flow；Then change gravel layer size or filling method, other conditions are constant, repeat to test, measure gravel layer both sides
Pressure difference and experimental pressure and flow；Finally gravel layer sand block performance evaluation software is applied to carry out data acquisition, data processing
The Performance Evaluating Indexes of analysis and gravel layer calculate.By crossing sand coarse aggregate ratio, sand block performance indicator, trafficability performance index, anti-clogging
The stability that performance indicator, integrated performance index and observation obtain gravel layer is compared.Experimental result is shown in Tables 1 and 2s：
1 comparative example experiment analysis results (reservoir sand d of table50=50 μm)
2 comparative example experiment analysis results (reservoir sand d of table50=15 μm)
Comprehensive upper table 1, table 2 are as can be seen that the sand control screen of the present invention differs not with the mistake sand coarse aggregate ratio effect of comparative example 1,2
Greatly, compared with comparative example 3 only has the sand control screen of two layers of gravel layer, sand control screen of the invention is crossed sand coarse aggregate ratio and far smaller than to be compared
Example 3 only has the anti-screen casing of two layers of gravel layer, although the sand block performance of comparative example 1,2 is similar with the present invention, 2 third of comparative example
The variation of gravel layer, the second gravel layer, the first gravel layer position, directly results in trafficability performance and performance of anti-blockage is far smaller than
The present invention's, the stability of comparative example 1 substantially reduces, and the visible hole washed away of naked eyes, this also illustrates more grades are compound to fill
The composition of packing course and position play sand block performance, trafficability performance and performance of anti-blockage decisive, and the present invention is more, and grade is compound
The forming of the position of filling layer and more grade combination filling layers, the thickness of each layer and composition so that screen casing of the invention was both
Extra-fine sand even super Extra-fine sand can be kept off, and there is high trafficability performance, improves harvest efficiency, while filling layer stable structure, it will not
It caves in unstability.
Claims (10)
1. a kind of compound restraining liner of the more grades of multilayer suitable for Extra-fine sand sand control, described suitable for the more of Extra-fine sand sand control
The more compound restraining liners of grade of layer include successively from the inside to the outside：
Base tube；
Interior wrapping wire layer, is socketed in base tube outer surface；
More grade combination filling layers are socketed in except interior wrapping wire layer, and more grade combination filling layers are three layers, interlayer pack gravel,
It is differed per layer thickness, grain size of gravel between layers is different；
Outer wrapping wire layer is socketed in except more grade combination filling layers；
Outermost outer protective cover；
Wherein, base tube, interior wrapping wire layer, more grade combination filling layers, outer wrapping wire layer and outer protective cover are tubulose.
2. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In more grade combination filling layers include successively from inside to outside：Third gravel layer, the second gravel layer, the first gravel layer；The
Three gravel layers are isolated flow-guiding screen by two level with the second gravel layer and are separated, and the second gravel layer is isolated with the first gravel layer by level-one
Flow-guiding screen separates.
3. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In the thickness of third gravel layer is 10mm, and the thickness of the second gravel layer is 10-15mm, and the thickness of the first gravel layer is 10-
15mm。
4. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In third gravel layer cobble-stone median grain diameter is 1.1-1.6 times of the second gravel layer cobble-stone median grain diameter；In second gravel layer
Median gravel size is 1.5-2 times of the first gravel layer cobble-stone median grain diameter；First gravel layer cobble-stone median grain diameter is ground
6-10 times of layer fineness of sand intermediate value.
5. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In the level-one isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 0.8-1.2mm；Its mesh size is the
The 2/3 of minimum grain size gravel particle grain size in one gravel layer.
6. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In the two level isolation flow-guiding screen is the stainless steel plate mesh for being covered with round hole, thickness 0.8-1.2mm；Its mesh size is the
The 2/3 of minimum grain size gravel particle grain size in two gravel layers.
7. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In the slit width of outer wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in the first gravel layer.
8. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In the slit width of interior wrapping wire layer gap is 2/3 of minimum grain size gravel particle grain size in third gravel layer.
9. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In being evenly distributed with several deflector holes on the tube wall of base tube, deflector hole is circle, a diameter of 8-10mm.
10. the more grades of the multilayer compound restraining liner according to claim 1 suitable for Extra-fine sand sand control, feature exists
In third gravel is laminated to be close to interior wrapping wire layer, and another side is close to two level isolation flow-guiding screen；First gravel is laminated to be close to level-one
Flow-guiding screen is isolated, another side is close to outer wrapping wire layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176099.9A CN108457627B (en) | 2018-03-02 | 2018-03-02 | A kind of more compound restraining liners of grade of multilayer suitable for Extra-fine sand sand control |
Applications Claiming Priority (1)
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| CN109488263A (en) * | 2018-11-02 | 2019-03-19 | 中国石油天然气股份有限公司 | Gravel fills tubing string, gravel packing systems and gravel pack methods |
| CN109811827A (en) * | 2019-03-22 | 2019-05-28 | 新疆铁道勘察设计院有限公司 | A kind of Double-layer water well casing with filter structure |
| CN111396027A (en) * | 2020-03-25 | 2020-07-10 | 中国石油大学(华东) | Horizontal well sand production and water outlet profile prediction method and sand control and water control sieve tube optimization design method |
| CN111852413A (en) * | 2019-04-08 | 2020-10-30 | 中国石油天然气股份有限公司 | Filter piece of sand control screen pipe, sand control screen pipe and preparation method |
| CN112610194A (en) * | 2021-03-08 | 2021-04-06 | 东营市正能石油科技有限公司 | Bypass prefilled screen pipe for oil field |
| CN113047819A (en) * | 2021-03-09 | 2021-06-29 | 中国石油天然气集团公司 | Sand control screen pipe and application thereof |
| CN113107437A (en) * | 2021-04-19 | 2021-07-13 | 天津大学 | Multistage sand prevention method for exploiting argillaceous silt natural gas hydrate reservoir |
| CN113513312A (en) * | 2021-04-19 | 2021-10-19 | 天津大学 | Sand control simulation experiment device for natural gas hydrate exploitation |
| CN114809996A (en) * | 2022-04-27 | 2022-07-29 | 西南石油大学 | Sand prevention device for ocean hydrate production |
| CN115012884A (en) * | 2022-06-09 | 2022-09-06 | 中科泰成石油科技(海南)有限公司 | Multi-stage sand-proof screen pipe |
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| CN109488263B (en) * | 2018-11-02 | 2021-11-02 | 中国石油天然气股份有限公司 | Gravel packing string, gravel packing system and gravel packing method |
| CN109811827A (en) * | 2019-03-22 | 2019-05-28 | 新疆铁道勘察设计院有限公司 | A kind of Double-layer water well casing with filter structure |
| CN111852413A (en) * | 2019-04-08 | 2020-10-30 | 中国石油天然气股份有限公司 | Filter piece of sand control screen pipe, sand control screen pipe and preparation method |
| CN111396027A (en) * | 2020-03-25 | 2020-07-10 | 中国石油大学(华东) | Horizontal well sand production and water outlet profile prediction method and sand control and water control sieve tube optimization design method |
| CN112610194A (en) * | 2021-03-08 | 2021-04-06 | 东营市正能石油科技有限公司 | Bypass prefilled screen pipe for oil field |
| CN112610194B (en) * | 2021-03-08 | 2021-06-18 | 大庆市宏博晟达石油机械设备有限公司 | Bypass prefilled screen pipe for oil field |
| CN113047819A (en) * | 2021-03-09 | 2021-06-29 | 中国石油天然气集团公司 | Sand control screen pipe and application thereof |
| CN113107437A (en) * | 2021-04-19 | 2021-07-13 | 天津大学 | Multistage sand prevention method for exploiting argillaceous silt natural gas hydrate reservoir |
| CN113513312A (en) * | 2021-04-19 | 2021-10-19 | 天津大学 | Sand control simulation experiment device for natural gas hydrate exploitation |
| CN114809996A (en) * | 2022-04-27 | 2022-07-29 | 西南石油大学 | Sand prevention device for ocean hydrate production |
| CN114809996B (en) * | 2022-04-27 | 2022-12-13 | 西南石油大学 | Sand prevention device for ocean hydrate production |
| CN115012884A (en) * | 2022-06-09 | 2022-09-06 | 中科泰成石油科技(海南)有限公司 | Multi-stage sand-proof screen pipe |
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