CN106639991A - Sand control screen pipe and manufacturing method thereof - Google Patents
Sand control screen pipe and manufacturing method thereof Download PDFInfo
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- CN106639991A CN106639991A CN201611061140.5A CN201611061140A CN106639991A CN 106639991 A CN106639991 A CN 106639991A CN 201611061140 A CN201611061140 A CN 201611061140A CN 106639991 A CN106639991 A CN 106639991A
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- Prior art keywords
- tube wall
- hole
- sand control
- control screen
- base
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- 239000004576 sand Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 238000000429 assembly Methods 0.000 claims description 58
- 230000000712 assembly Effects 0.000 claims description 58
- 239000011521 glass Substances 0.000 claims description 53
- 238000012216 screening Methods 0.000 claims description 53
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 239000012634 fragment Substances 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Filtering Materials (AREA)
Abstract
The invention provides a sand control screen pipe and a manufacturing method thereof, wherein the sand control screen pipe comprises the following steps: a base pipe and a plurality of filter units; the tube wall of the base tube is provided with a plurality of through holes, and one filtering unit is arranged in one through hole; each filter unit comprises: the filter assembly is provided with a plurality of annular slits along the direction from the outer pipe wall of the base pipe to the inner pipe wall of the base pipe, and the protective sheet is provided with through holes; the filter assembly is arranged in the through hole on the pipe wall at a position far away from the outer pipe wall, and the protection sheet is arranged in the through hole on the pipe wall at a position close to the outer pipe wall. The sand control screen pipe increases the flow area of the sand control screen pipe, improves the flow capacity and improves the sand control efficiency.
Description
Technical field
The present invention relates to the sand control structure of Oil/gas Well, more particularly to sand control screen and preparation method thereof.
Background technology
During oil gas well mining, generally existing formation sand production phenomenon takes sand control measure to be to solve sand production of oil-gas wells to ask
The Main Means of topic, and sand control screen is instrument most important in sand control measure, most widely used.
At present the sand control screen used in Oil/gas Well easily produces the failures such as blocking, erosion attack, corrosion failure, causes
After screen failure, and screen failure, it tends to be difficult to salvage, or even there is Oil/gas Well successfully to salvage because of screen casing, and be forced to close
Well, or even scrap.For screen casing salvages Oil/gas Well that is difficult or salvaging high cost, screen casing can be taken to bore the mode of mill, by well
Interior sand control screen is completely or partially bored and ground off, then re-starts sand control completion.Adopting slotted sand control liner oil well at present, this cuts more
Seam sand control screen really arranges multiple gaps parallel to the base tube central shaft on the wall of base tube side.
However, the area of passage of the slotted sand control liner is low, conveyance capacity is poor, it is difficult to meet sand control demand.
The content of the invention
The present invention provides a kind of sand control screen and preparation method thereof, to improve area of passage, conveyance capacity is improved, so as to full
Sufficient sand control demand.
The sand control screen that the present invention is provided, including：Base tube and multiple filter elements；It is provided with the tube wall of the base tube many
Individual through hole a, filter element is arranged in a through hole；Each filter element includes：Filter assemblies and screening glass, the mistake
Filter component is provided with multiple annulus along the outer tube wall of the base tube to the direction of the inner tubal wall of the base tube, on the screening glass
It is provided with through hole；The filter assemblies are arranged on the through hole on the tube wall Nei away from the position of the outer tube wall, the protection
Piece is arranged in the through hole on the tube wall near the position of the outer tube wall.
Optionally, the screening glass is circular sheet-like structures, and multiple through holes are provided with the screening glass.
Optionally, multiple fan-shaped pylones are provided with the screening glass, the fan-shaped pylone is radially arranged, wherein,
The central authorities of the screening glass are pointed at the tip of the fan-shaped pylone, the arc of the fan-shaped pylone while towards the screening glass while
Edge.
Optionally, the through hole on the tube wall is the step that radius reduces by the outer tube wall to said inner tube wall direction
Through hole, the filter element is arranged in the through hole on the tube wall on the corresponding step in maximum radius position.
Optionally, the through hole on the tube wall is the step that radius reduces by the outer tube wall to said inner tube wall direction
Through hole；
Described each filter element also includes support base, and the support base includes side plate, base plate and cavity；The side plate with
The base plate is vertically arranged, and at least one through hole is provided with the base plate, and the cavity is the side plate and base plate institute
The cavity of formation；The base plate is arranged in the through hole on the tube wall on the corresponding step in maximum radius position；
The side plate is fitted with the through hole on the tube wall, and the filter assemblies are arranged in the cavity.
Optionally, the filter assemblies are set by the different multiple filtration ring sets of radius and are constituted, and are arranged between adjacent head ring
There is support bar, to form annulus in the adjacent head interannular, and adjacent annular seam width is equal.
Optionally, on the outer tube wall to said inner tube wall direction, each filters ring thickness and is gradually reduced, described adjacent
The annulus width for filtering interannular gradually increases.
Optionally, one end of the base tube is provided with connector, and the connector is box cupling；One end of the base tube and institute
State connector threaded connection.
The preparation method of the sand control screen that the present invention is provided, including：
Multiple through holes are uniformly drilled through on the tube wall of base tube；
By a filter assemblies and a screening glass assembling, a filter element in multiple filter elements is formed；Wherein,
The filter assemblies are provided with multiple annulus along the outer tube wall of the base tube to the direction of the inner tubal wall of the base tube；The guarantor
Through hole is provided with bluff piece；
Filter assemblies in each filter element are arranged in the through hole on the tube wall away from the position of the outer tube wall
Put, the screening glass is arranged in the through hole on the tube wall near the position of the outer tube wall.
The sand control screen that the present invention is provided, including：Base tube and multiple filter elements；It is provided with the tube wall of the base tube multiple
Manhole a, filter element is arranged in a through hole；Each filter element includes：Filter assemblies and screening glass, the mistake
Filter component is provided with multiple annulus along the outer tube wall of the base tube to the direction of the inner tubal wall of the base tube, is provided with the screening glass
Through hole；The filter assemblies are arranged on away from the position of the outer tube wall through hole on the tube wall Nei, and the screening glass is arranged on the tube wall
On through hole near the outer tube wall position.In the sand control screen, due to being provided with multiple manholes on the tube wall of base tube,
Include a filter assemblies in each through hole, and filter assemblies are provided with along the outer tube wall of base tube to the direction of the inner tubal wall of base tube
Multiple annulus, thus the area of passage of sand control screen is increased, conveyance capacity is improved, so as to improve sand control efficiency.
Description of the drawings
Fig. 1 is the structural representation of the sand control screen of the present invention；
Fig. 2 is partial enlarged drawing at A in Fig. 1；
Fig. 3 is partial enlarged drawing at B in Fig. 1；
Fig. 4 is the front view of the screening glass of the present invention；
Fig. 5 is the top view of the screening glass of the present invention；
Fig. 6 is the radial cross-section of the through hole on base tube of the present invention；
Fig. 7 is the radial cross-section of the filter element of the present invention；
Fig. 8 is the front view of the support base of the present invention；
Fig. 9 is the top view of the support base of the present invention；
Figure 10 is the top view of filter assemblies of the present invention；
Figure 11 is the top view of the filtration ring of the present invention；
Figure 12 is the sectional view of the filtration ring of the present invention；
Figure 13 is the attachment structure schematic diagram of the sand control screen with connector of the present invention；
Figure 14 is the flow chart of sand control screen preparation method of the present invention.
Description of reference numerals：1- base tubes；2- connectors；3- filter elements；4- through holes；31- filter assemblies；32- support bases；
33- screening glass；311- filters ring；312- annulus；313- support bars；321- through holes；331- through holes.
Specific embodiment
The sand control screen that the present invention is provided can apply to the mining operations of the Oil/gas Wells such as oil well, gas well, be mainly used in by
Sand grains is blocked in outside screen casing realizes that sand control is acted on.Using when, it is necessary first to sand control screen is inserted in well, can be by sand control
Screen casing enters well after connector 2 is connected with oil pipe, is placed near payzone, and the medium Jing after sand control screen is filtered is entered in oil pipe
And be extracted, the sand grains in payzone is blocked in outside sand control screen, outside being isolated in oil pipe or sleeve pipe so that sand grains is stayed
Stratum can be played a supporting role in payzone.
Fig. 1 is the structural representation of the sand control screen of the present invention.As shown in figure 1, the sand control screen that the present invention is provided, bag
Include：Base tube 1 and multiple filter elements 3；Multiple through holes are provided with the tube wall of the base tube 1, a filter element 3 is arranged on one
In through hole 4.
For example, the length of the base tube 1 is 9.4m, and external diameter 139.7mm, internal diameter is 118.6mm.
Through hole 4 is circle, it is to avoid rectangle slot used in prior art occur, occurs stress concentration at rectangle drift angle and shows
As reducing the crush resistance strength of sand control screen.And filter element 3 is arranged in through hole 4, integral structure is formed with base tube 1,
The problem of stress concentration that the filtration seam of cutting seam sieve tube is present equally is avoided, crush resistance strength is improve.Can avoid simultaneously by
Filter element 3 is arranged on outside base tube 1, it is to avoid the outside dimension of base tube 1 is excessive, reduces the impact to borehole size after completion.
Fig. 2 is partial enlarged drawing at A in Fig. 1, and Fig. 3 is partial enlarged drawing at B in Fig. 1.As shown in Figure 2 and Figure 3, each mistake
Filter unit 3 includes：Filter assemblies 31 and screening glass 33, the filter assemblies 31 along the base tube 1 outer tube wall to the base tube 1 inner tube
The direction of wall is provided with multiple annulus 312.For example, the annulus 312 for arranging on each filter assemblies 31 can be 1-9
Bar.Annulus 312 on filter assemblies 31 can cause the impurity particle in fluid to pass through, to filter to fluid.
The filter assemblies 31 are arranged on away from the position of the outer tube wall through hole 4 on the tube wall Nei, and the screening glass 33 is arranged
Near the position of the outer tube wall in through hole 4 on the tube wall.Specifically, the lateral wall of the filter assemblies 31 can be logical with this
The madial wall in hole 4 closely ties laminating, to prevent fluid in impurity particle from the lateral wall of filter assemblies 31 and the inner side of through hole 4
Gap between wall is entered in base tube 1.
Screening glass 33 is arranged in the through hole on the tube wall near the position of the outer tube wall；Through hole is provided with screening glass 33
331.Through hole on the screening glass 33 is fan-shaped pylone, and the fan-shaped pylone is radially arranged, wherein, the tip of the fan-shaped pylone
Point to the central authorities of the screening glass, the edge of the arc side of the fan-shaped pylone towards screening glass 33.Screening glass 33 is arranged on the tube wall
On through hole near the outer tube wall position, thus, screening glass 33 is also referred to as outer protection piece.By in filter assemblies 31
Top arrange screening glass 33, can effectively impact of the slowing down fluid to filter assemblies 31, to filter assemblies 31 have protective effect, drop
Low possibilities of the filter assemblies 31 by erosion attack, it is ensured that the service life of filter assemblies 31.
In the present embodiment, due to being provided with multiple through holes 4 on the tube wall of base tube 1, a filtration group is included in each through hole 4
Part 31, and filter assemblies 31 are provided with multiple annulus 312 along the outer tube wall of base tube 1 to the direction of the inner tubal wall of base tube 1, thus
The area of passage of sand control screen is increased, conveyance capacity is improve, so as to improve sand control efficiency；By in the top of filter assemblies 31
Screening glass 33 is set, can effectively impact of the slowing down fluid to filter assemblies 31, to filter assemblies 31 with protective effect, reduce
Filter assemblies 31 are by the possibility of erosion attack, it is ensured that the service life of filter assemblies 31.
Meanwhile, the sand control screen that the present invention is provided also avoid stress concentration caused by filtration seam, improve crush resistance strength.
Optionally, on the basis of sand control screen as above, the present invention also provides a kind of screening glass.Fig. 4 is this
The front view of bright screening glass 33, Fig. 5 is the top view of the screening glass 33 of the present invention.As shown in Figure 4, Figure 5, the screening glass 33 is
Circular sheet-like structures, on the screening glass 33 multiple fan-shaped pylones 331 are provided with, and the fan-shaped pylone 331 is radially arranged, its
In, the central authorities of screening glass 33, the edge of the arc side of fan-shaped pylone 331 towards screening glass 33 are pointed in the tip of the fan-shaped pylone 331.
The present embodiment can increase the contact surface of annulus 312 and husky body by arranging multiple through holes 331 on screening glass 33
Product, increased the volume of filter sand body, and then improved conveyance capacity, so as to improve sand control efficiency.
It should be noted that the structure of the screening glass 33 shown in Fig. 4 and Fig. 5 is only a kind of structure example, the present invention is provided
Sand control screen in screening glass 33 can also be other similar structures, will not be described here.
Further, Fig. 6 is the radial cross-section of the through hole 4 on base tube of the present invention 1, as shown in fig. 6, the through hole on tube wall
4 is the step through-hole that radius reduces by the outer tube wall to the inner tubal wall direction, for example, the radius of the step through-hole is maximum
For 13mm, minimum 8mm, the filter element 3 is arranged in the through hole 4 on the tube wall on the corresponding step in maximum radius position.
Step inside through hole 4 has supporting role to filter assemblies 31, while the stress of step cutting pattern through hole 4 is more uniformly distributed, can be with maximum
The intensity of base tube 1 is kept in degree.
Further, on the basis of sand control screen as above, the present invention also provides a kind of filter element.Fig. 7 is
The radial cross-section of filter element of the present invention 3, as shown in fig. 7, each filter element 3 also includes support base 32, the support base 32
Including side plate, base plate and cavity；The side plate is vertically arranged with the base plate, and at least one through hole 321, the sky are provided with the base plate
Chamber is the cavity that the side plate and the base plate are formed；The base plate is arranged on maximum radius position correspondence in the through hole 4 on the tube wall
Step on；The side plate is fitted with the through hole 4 on the tube wall, and the filter assemblies 31 are arranged in the cavity.Wherein, support base 32
For being supported to filter assemblies 31, support base 32 is set into said structure, the side wall of filter assemblies 31 can be carried out
Protection.
Optionally, inner support earial drainage piece is also included in filter element 3 as shown in Figure 7.Inner support earial drainage piece is arranged on sky
Near the position of base plate in chamber.Inner support earial drainage piece can be played a supporting role to the filter assemblies in filter element, meanwhile, interior
The through hole opened up on support earial drainage piece has the function of earial drainage, because the via area of inner support earial drainage piece is more than support base base plate
The hole area of through hole 321, after husky body passes through annulus 312, contacts first inner support earial drainage piece, then contacts support base 32；
Hole area is sequentially reduced along husky body flow direction, it is ensured that tiny husky physical efficiency is quickly through filter element 3, it is to avoid result in blockage.
It should be noted that the concrete structure of inner support earial drainage piece can be similar with the concrete structure of above-mentioned screening glass,
This is repeated no more.
Further, on the basis of sand control screen as above, the present invention also provides a kind of support of filter element
Seat.Fig. 8 is the front view of the support base 32 of the present invention, and Fig. 9 is the top view of the support base 32 of the present invention, as shown in Figure 8, Figure 9,
At least provided with a through hole 321, fluid is flowed through after annulus 312 filtered the base plate of support base 32, by through hole 321
Into inside base tube 1, the through hole 321 can be uniformly arranged multiple, it is ensured that the fluid filtered through filter assemblies 31 rapidly enters base
Inside pipe 1.
Optionally, the support base is that the Al-alloy metal rod of a diameter of 24-32mm is cut into the aluminium alloy that thickness is 1-2mm
After piece, then processed by impact style.
It should be noted that the structure of the support base 32 shown in Fig. 8 and Fig. 9 is only a kind of structure example, the present invention is carried
For sand control screen in support base 32 can also be other similar structures, will not be described here.
Further, on the basis of sand control screen as above, the present invention also provides a kind of filter assemblies.Figure 10 is
The top view of filter assemblies of the present invention 31, as shown in Figure 10, filter assemblies 31 are arranged group by the different multiple filtration rings 311 of radius
Into, support bar 313 is provided between adjacent head ring 311, the interior filtration lateral wall of ring 311 is provided with 2-8 support bar 313, uses
To form annulus 312 between the adjacent head ring 311, and adjacent annular 312 width of seam are equal.
Further, the diameter maximum of the filter assemblies for example can be 25mm.
Further, on the basis of sand control screen as above, the present invention also provides the mistake in a kind of filter assemblies
Filter ring.Figure 11 be the present invention filtration ring 311 top view, Figure 12 be the present invention filtration ring 311 sectional view, such as Figure 11,
Shown in Figure 12, along the direction of the outer wall of base tube 1 to the inwall of base tube 1, each filters the thickness of ring 311 and is gradually reduced, each annular
Stitch 312 width gradually to increase.The annulus 312 of outer narrow inner width is designed so that shale particle and fine sand are entered will not after filtration seam
Stop in seam is filtered and result in blockage, with " self-cleaning " function, anti-blockage capability is strong.
Further, the width of annulus 312 for example can be 0.05mm for minimum, and maximum for example can be 1mm.
It should be noted that the structure of the filtration ring 311 shown in Figure 11 and Figure 12 is only a kind of structure example, the present invention is carried
For sand control screen in filter ring 311 can also be other similar structures, will not be described here.
Further, on the basis of sand control screen as above, the present invention also provides a kind of sand control screen with outside
The attachment structure of connector.Figure 13 is the attachment structure schematic diagram of the sand control screen with connector of the present invention, as shown in figure 13, is prevented
It is threadedly coupled between one end of base tube 1 in sand sieve pipe and connector 2, i.e., one end of base tube 1 is provided with external screw thread, in connector
2 one end is provided with the internal thread matched with the external screw thread of base tube 1, is threadably fixed as between base tube 1 and connector 2
Integrally, in the present embodiment, the other end of connector 2 need be connected with oil pipe, therefore, the other end of connector 2 can also with oil pipe with
Engagement thread connects, and in the present embodiment, when base tube 1 is threadably connected with connector 2, being between base tube 1 and connector 2 can
Dismounting, so it is easy for installation and removal.
It should be noted that the base tube 1 shown in Figure 13 is only a kind of connected mode with the thread connecting mode of connector 2
Example, the base tube 1 in the sand control screen that the present invention is provided can also be other similar connection sides with the connected mode of connector 2
Formula, will not be described here.
Further, the present embodiment base tube 1 and connector 2 are processed into using the good aluminum alloy materials of drillability, mistake
Filter component 31, support base 32, screening glass 33 are then processed into using stainless steel material.
Prior art sand control screen is made up of steel alloy more, but steel alloy hardness, intensity are larger, and crushing resistance is stronger, but
Once blocking or burying, sand is difficult to clear up existing sand control screen, while sand control screen is difficult to be drilled to fragment, it is so existing anti-
There is blocking or buries typically all to salvage to come in sand sieve pipe, and has a strong impact on oil mining efficiency, or even causes oil well to scrap,
In the present embodiment, the base tube 1 of sand control screen is made using aluminium alloy, and compared with steel alloy, its density is relatively low, matter under same volume
Amount is relatively light, and hardness is low, good corrosion resistance, and long service life is broken, after sand control screen is buried, it is only necessary to general brill
Sand control screen can be drilled to fragment by grinder tool, simultaneously because its density is less, is drilled to after fragment and is easy to salvage, by screen casing fragment
Salvaging can continue to exploit oil well after coming, and so as to reduce oil well learies, and then reduce economic loss.
Preferably, in the present embodiment, filter assemblies 31, support base 32, screening glass 33 are made using stainless steel material, stainless
It is Steel material erosion resistance, corrosion-resistant, filter assemblies 31 are reduced by the possibility of erosion attack.
The present invention also provides a kind of preparation method of sand control screen.Figure 14 is the flow process of sand control screen preparation method of the present invention
Figure.As shown in figure 14, the method may include following steps：
S1401, uniformly drill through on the tube wall of base tube 1 multiple through holes 4.
Specifically, the through hole 4 on the tube wall is the step through-hole that radius reduces by the outer tube wall to the inner tubal wall direction,
The filter element 3 is arranged in the through hole 4 on the tube wall on the corresponding step in maximum radius position.Step pair inside through hole 4
Filter assemblies 31 have supporting role, while step cutting pattern through hole stress is more uniformly distributed, can to the full extent keep the strong of base tube 1
Degree.
S1402, a filter assemblies 31 and a screening glass 33 are assembled, form a mistake in multiple filter elements 3
Filter unit 3；Wherein, the filter assemblies 31 are provided with multiple rings along the outer tube wall of the base tube 1 to the direction of the inner tubal wall of the base tube 1
Shape seam 312；Through hole 331 is provided with the screening glass 33.
Optionally, the screening glass 33 adopt the Al-alloy metal rod of a diameter of 22-24mm to cut into thickness for 1-2mm aluminium
Alloy sheet, by impact style circular sheet-like structures are processed into, and on the screening glass 33 multiple through holes 331 are provided with；The filtration
Component 31 is arranged by the different multiple filtration rings 311 of radius and is constituted, and the filtration ring 31 is cut by the stainless steel metal rod of different-diameter
After being cut into the sheet metal that thickness is 3-6mm, using Digit Control Machine Tool sheet metal is processed by cutting way, adjacent head ring
Support bar 313 is provided between 311, to form annulus 312 between the adjacent head ring 311, and adjacent annular seam 312 is wide
Degree is equal；On the outer tube wall to the inner tubal wall direction, each filters the thickness of ring 311 and is gradually reduced, between the adjacent head ring 311
The width of annulus 312 gradually increase；In the sand control screen, due to being provided with multiple through holes on the tube wall of base tube 1, each through hole
Inside include a filter assemblies 31, and filter assemblies 31 be provided with to the direction of the inner tubal wall of base tube 1 along the outer tube wall of base tube 1 it is many
Individual annulus 312, thus the area of passage of sand control screen is increased, conveyance capacity is improved, so as to improve sand control efficiency.
S1403, the through hole 4 by the filter assemblies 31 in each filter element 3 on the tube wall are interior away from the outer tube
The position of wall, the screening glass 33 is arranged in the through hole 4 on the tube wall near the position of the outer tube wall.
The sand control screen manufactured using the method, filter element 3 is arranged in through hole 4, and with base tube 1 integral type knot is formed
Structure, it is to avoid the problem of stress concentration that the filtration seam of cutting seam sieve tube is present, improves the crush resistance strength of sand control screen.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of sand control screen, it is characterised in that include：Base tube and multiple filter elements；It is provided with the tube wall of the base tube
Multiple manholes a, filter element is arranged in a through hole；Each filter element includes：Filter assemblies and screening glass,
The filter assemblies are provided with multiple annulus, the guarantor along the outer tube wall of the base tube to the direction of the inner tubal wall of the base tube
Through hole is provided with bluff piece；The filter assemblies are arranged on the through hole on the tube wall Nei away from the position of the outer tube wall, institute
State in the through hole that screening glass is arranged on the tube wall near the position of the outer tube wall.
2. sand control screen according to claim 1, it is characterised in that the screening glass is circular sheet-like structures, the guarantor
Multiple through holes are provided with bluff piece.
3. sand control screen according to claim 2, it is characterised in that multiple fan-shaped pylones are provided with the screening glass,
The fan-shaped pylone is radially arranged, wherein, the central authorities of the screening glass, the sector are pointed in the tip of the fan-shaped pylone
Edge of the arc side of through hole towards the screening glass.
4. sand control screen according to claim 1, it is characterised in that the through hole on the tube wall be by the outer tube wall extremely
The step through-hole that radius reduces on said inner tube wall direction, the filter element is arranged on the through hole on the tube wall Nei maximum half
On the corresponding step of path position.
5. sand control screen according to claim 1, it is characterised in that the through hole on the tube wall be by the outer tube wall extremely
The step through-hole that radius reduces on said inner tube wall direction；
Described each filter element also includes support base, and the support base includes side plate, base plate and cavity；The side plate with it is described
Base plate is vertically arranged, and at least one through hole is provided with the base plate, and the cavity is formed by the side plate and the base plate
Cavity；The base plate is arranged in the through hole on the tube wall on the corresponding step in maximum radius position；
The side plate is fitted with the through hole on the tube wall, and the filter assemblies are arranged in the cavity.
6. the sand control screen according to any one of claim 1-5, it is characterised in that the filter assemblies are different by radius
Multiple filtration ring sets set composition, be provided with support bar between adjacent head ring, to the adjacent head interannular formed ring
Shape is stitched, and adjacent annular seam width is equal.
7. sand control screen according to claim 6, it is characterised in that on the outer tube wall to said inner tube wall direction,
Each filters ring thickness and is gradually reduced, and the annulus width of the adjacent head interannular gradually increases.
8. sand control screen according to claim 1, it is characterised in that one end of the base tube is provided with connector, described
Connector is box cupling.
9. sand control screen according to claim 8, it is characterised in that one end of the base tube connects with the connector screw thread
Connect.
10. a kind of preparation method of sand control screen, it is characterised in that include：
Multiple through holes are uniformly drilled through on the tube wall of base tube；
By a filter assemblies and a screening glass assembling, a filter element in multiple filter elements is formed；Wherein, it is described
Filter assemblies are provided with multiple annulus along the outer tube wall of the base tube to the direction of the inner tubal wall of the base tube；The screening glass
On be provided with through hole；
Filter assemblies in each filter element are arranged in the through hole on the tube wall away from the position of the outer tube wall, institute
Screening glass is stated in the through hole on the tube wall near the position of the outer tube wall.
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| CN201611061140.5A CN106639991A (en) | 2016-11-28 | 2016-11-28 | Sand control screen pipe and manufacturing method thereof |
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| CN201611061140.5A CN106639991A (en) | 2016-11-28 | 2016-11-28 | Sand control screen pipe and manufacturing method thereof |
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Cited By (1)
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|---|---|---|---|---|
| CN111101906A (en) * | 2020-01-08 | 2020-05-05 | 王成军 | Sand control screen pipe for oil extraction |
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Application publication date: 20170510 |