CN101260797B - Filtering material for oil well sand preventing screen pipe and method for making same - Google Patents
Filtering material for oil well sand preventing screen pipe and method for making same Download PDFInfo
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- CN101260797B CN101260797B CN2008100473955A CN200810047395A CN101260797B CN 101260797 B CN101260797 B CN 101260797B CN 2008100473955 A CN2008100473955 A CN 2008100473955A CN 200810047395 A CN200810047395 A CN 200810047395A CN 101260797 B CN101260797 B CN 101260797B
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Abstract
The invention relates to a filter material for an oil well anti-sand sieve tube, which is made by the following method that: one or a plurality of sets of monolayer wires with the diameter of 0.05 mm to 0.20 mm in parallel arrangement are respectively pressed into small triangular waveform by a primary compression roller; the compression roller teeth have a triangular shape; the top angle of the teeth is 60 degrees to 120 degrees; the modulus of the teeth is between 0.5 and 1.0; a set of wires pressed into the small triangular waveform are sent to a secondary compression roller or the plurality of sets of wires pressed into the small triangular waveform are stacked and combined according to layers and sent to the secondary compression roller; the modulus of the secondary compression roller is 2.0 to 3.0; after passing through the secondary compression roller, the wires are directly sent to a planished compression roller and the filter material for the oil well anti-sand sieve tube is obtained. The filter material for the oil well anti-sand sieve tube made has uniform linear density, regular shape and uniform size of holes, high pollutant receiving capacity and anti-clogging capacity; and effective pollutant receiving holes can reach above 80 percent of total holes. When the anti-sand sieve tube is made, the filter material can realize automatic winding while metal cotton can not achieve the point.
Description
Technical field
The present invention relates to filtering material for oil well sand preventing screen pipe and preparation method thereof.
Background technology
At present, the sand control screen that uses in the oil well mainly contains following several:
1, slotted liner: be at sleeve pipe or cut out many slits according to necessarily putting in order above the oil pipe and form that perforated area (or area of passage) generally has only 1%～3%.Slotted liner is usually used in the cementing strength height, few reservoir that shakes out, and is main purpose to prevent cave-in, so be bushing pipe.
2, wire-wrapped screen: mainly be made up of parent tube and screen jacket (JACKET) two parts, area of passage is 15%～30%, can be used in the reservoir of various lithology.When clastic reservoir rock low at cementing strength, that easily shake out is used (not doing gravel pack) separately, there is more serious blockage problem.So this screen casing will be used with gravel pack usually, be called for short gravel filling sand prevention.Gravel filling sand prevention effective, the life-span is long, but complex process, the engineering time is long, easily the near wellbore zone reservoir is polluted, and when constructing in high angle hole and horizontal well, success rate is low.
3, wire lath screen casing: mainly be made of parent tube and 3～5 layers of wire lath that are wrapped in the parent tube outside, area of passage is 25%～35%, and its purposes, performance and problem and wire-wrapped screen are very approaching.
4, metal wool screen casing: the water environment capacity of metal wool is generally several times to tens times of wire lath, so the anti-blockage capability of metal wool screen casing is more much higher than wire-wrapped screen and wire lath screen casing.When using the metal wool screen sand control, do not do gravel pack, so just simplified construction technology, shortened the engineering time.In recent years, in high angle hole and horizontal well sand control, the metal wool screen casing has obtained to use widely.The metal wool screen casing also has its weak point, when the high reservoir of spun yarn, flour sand, viscous crude, clay content uses, still has blockage problem.
A large amount of practices show, if above-mentioned various screen casing uses (not doing gravel pack) separately, anti-blockage capability is followed successively by metal wool screen casing, wire lath screen casing, wire-wrapped screen, slotted liner by good to difference.
The structure of metal wool and characteristics: the metal wool that uses in the sand control screen, be that wire by one or both different-diameters constitutes, generally between 0.05mm～0.20mm, length is 50mm～150mm or longer to diameter wiry, and the degree of porosity of this metal wool can reach more than 90%.Preparation method and design feature have determined the hole irregular of this metal wool, and the change in size scope of hole is very big.A large number of experiments show that, fine pore in the metal wool (less than formation sand median particle size d50) and macrovoid (greater than three times of d50) are dirty unfavorable to receiving, that is to say that the fine pore does not have water environment capacity (sand grains can't enter the fine pore), macrovoid can make receives dirty lost efficacy (can not hang and hold sand grains).Even under the best is filled (compacting) state, also have only 30% hole can effectively receive dirt.
Summary of the invention
The purpose of this invention is to provide a kind of filtering material for oil well sand preventing screen pipe and preparation method thereof, this filter material line density is even, and pore shape is rule, and size is more even, when making sand control screen, can realize automatic winding.Have higher dirt and the anti-blockage capability received.
Technical solution of the present invention is: the filter material that oil well sand control screen tube is used is made by following method: with the diameter of one group or several groups individual layer laid parallel is that the wire of 0.05～0.20mm is pressed into little triangular waveform with first order pressure roller respectively; The pressure roller tooth be shaped as triangle, addendum angle 60～120 degree, the modulus of tooth is between 0.5～1.0; The one group of wire that is pressed into little triangular waveform is sent into second level pressure roller, several groups of wires that maybe will be pressed into little triangular waveform by stacked put merging after, send into second level pressure roller; The modulus of second level pressure roller tooth is 2.0～3.0, behind the pressure roller of the second level, wire is directly sent into the flattening-out pressure roller, promptly obtains the filter material that oil well sand control screen tube is used.
The wire of described several groups of individual layer laid parallels is the 2-5 group.
In technical scheme of the present invention, when wire diameter during at 0.05～0.08mm, the modulus of first order pressure roller tooth is 0.5; When wire diameter below 0.15mm and greater than 0.08 the time, the modulus of first order pressure roller tooth is 0.75; When wire diameter during below 0.2mm and greater than 0.15mm, the modulus of first order pressure roller tooth is 1.0.
The line density of the filter material that the oil well sand control screen tube that the present invention makes is used is very even, the pore shape rule, and size is (seeing Fig. 4 and Fig. 5) evenly; Have very high water environment capacity and anti-blockage capability, the dirty hole of effectively receiving can reach more than 80% of total pore space.When making sand control screen, can realize automatic winding, metal wool then can't be accomplished this point.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 for the present invention through shape schematic diagram wiry behind the first order pressure roller;
Fig. 3 for the present invention through second level pressure roller after shape schematic diagram wiry;
The shape of product schematic diagram that Fig. 4, Fig. 5 make for the present invention;
Fig. 6 is the corresponding water environment capacity schematic diagram of filter material pore size of the present invention;
Fig. 7 is the conveyance capacity contrast test equipment schematic of metal wool and filter material of the present invention;
Fig. 8 is the conveyance capacity result of the test figure of metal wool and filter material of the present invention.
The specific embodiment
(wherein, A represents the tinsel roller, generally wants 400-1200, decides according to demand referring to Fig. 1; The expression of B-B place roughly is divided into 4 groups with wire, sends into guide roller C then; E represents first order pressure roller; G represents second level pressure roller; I represents the flattening-out pressure roller; K represents the finished product of filter material of the present invention; At the D-D section part, wire is not as yet by pre-compaction forming; At the F-F section part, wire is pressed into little triangular waveform; At the H-H section part, wire is pressed into big triangular waveform; At the J-J section part, the filter material moulding), the filter material that oil well sand control screen tube of the present invention is used can be made by following method:
1,400～1200 tinsel rollers (also claiming string bag) fitly is placed on the support, wire is equally divided into four groups, send into guide roller, so that make wire can enter first order pressure roller straightly.
When 2, wire enters first order pressure roller, should be individual layer, evenly spread out, intersection or overlapping had better not be arranged, otherwise easily squeezed off by first order pressure roller.First order pressure roller tooth be shaped as triangle, addendum angle 60～120 degree, the modulus of tooth is selected between 0.5～1.0.Behind first order pressure roller, shape wiry as shown in Figure 2.At this moment, the hole between the wire seldom still can not use as filter material.
3, through behind the first order pressure roller, again 4 groups of wires are merged, send into second level pressure roller.Behind the pressure roller of the second level, shape wiry as shown in Figure 3.The modulus of second level pressure roller tooth can be selected between 2.0～3.0, and the shape of tooth is preferably triangle, addendum angle without limits, at 60～120 degree for well.
4, through behind the pressure roller of the second level, wire is directly sent into the flattening-out pressure roller, promptly can be made into filter material of the present invention.The shape of flattening-out pressure roller and structure and first order pressure roller are identical.The hole of filter material of the present invention mainly determines (see figure 4) by the size and the shape of little triangular wave wiry.
The structure and the characteristics of the filter material that oil well sand control screen tube of the present invention is used (INFILTER filter material): the INFILTER filter material is to be formed through special compacting by hundreds of root and even thousands of one metal wire.The diameter of wire (stainless steel wire) is generally 0.05mm～0.20mm, and each one metal wire all is a continuous uninterrupted, so, the line density of this filter material is very even, when making sand control screen, can realize automatic winding, metal wool then can't be accomplished this point.The hole of INFILTER filter material forms in the preform pressing process, the pore shape rule, and size is (see figure 5) evenly.The filter material that the water environment capacity that the present invention makes is very high, the dirty hole of effectively receiving can reach 80% above (see figure 6) of total pore space.
Making the wire diameter of INFILTER filter material can select by 0.8～1.2 times of formation sand median particle size d50, and the modulus of first order pressure roller tooth is preferably selected by following principle: wire diameter is when 0.05～0.08mm, and modulus is 0.5; Wire diameter is when 0.08～0.15mm, and modulus is 0.75; Wire diameter is during greater than 0.15mm, and modulus is 1.0.
The conveyance capacity contrast test of metal wool and INFILTER filter material:
1, test method: under conditions such as identical test pressure, fluid media (medium), obstruction component, these two kinds of filter materials are opposed than test the following (see figure 7) of the schematic diagram of testing equipment.
Among Fig. 7,1 expression common metal cotton, the urceolus of 2 expression experimental facilitiess, the annular space that returns on the 3 expression fluids, fluid after 4 expressions filter material of the present invention, 5 expressions filter through filter material, 6 expression experiment frames, the parent tube that is equivalent to screen casing, 7 expression annular spaces, i.e. annular space between the borehole wall and the screen casing, 8 expression grid tubes, simulate the radial flow of near wellbore zone with this, 9 expressions contain the fluid of solid particulate matter.
2, result of the test (see figure 8): the wire of making metal wool and filter material of the present invention all is that diameter is the stainless steel wire of 0.12mm, fluid is that fresh water adds PAC (raising fluid viscosity), funnel viscosity (FV) 80 seconds adds 0.2% clay (with water weight ratio) again, and test sand d50 is 125 microns.Result of the test shows: the conveyance capacity of filter material of the present invention (curve 1) is roughly the twice of the cotton conveyance capacity of common metal (curve 2).And along with test sand is constantly piled up in two kinds of filter materials, both conveyance capacity difference are big more.
Explanation to Fig. 8 (trial curve): when the conveyance capacity contrast property test of doing filter material, used six-channel recorder, one of them passage register system pressure, four passage record integrated fluxs, a channel standby.Because the flow of each passage is all very little, can't measure instantaneous delivery, can only cooperate the record integrated flux with LOAD CELLS with four 5 liters hopper.After wherein any one hopper is filled fluid, be with all hopper turned letter, once more from zero meter, so that curve is sawtooth is wavy.In addition, two kinds of filter materials intersections are placed in 4 quadrants of test stand, the flow with filter material of the same race merges again, to eliminate the influence of position difference, so have only 2 curves (sawtooth is wavy).
Above-mentioned test explanation, make oil well sand control screen tube with filter material of the present invention after, under the situation of sand production rate on an equal basis, its conveyance capacity is approximately the twice of metal wool screen casing, this not only can reduce the producing pressure differential of oil well, prolongs the production fluid time, also can improve the individual well total output greatly.
Claims (4)
1. the preparation method of the filter material used of oil well sand control screen tube is characterized in that comprising the steps: that diameter with one group or several groups individual layer laid parallel is that the wire of 0.05～0.20mm is pressed into little triangular waveform with first order pressure roller respectively; The pressure roller tooth be shaped as triangle, addendum angle 60～120 degree, the modulus of tooth is between 0.5～1.0; The one group of wire that is pressed into little triangular waveform is sent into second level pressure roller, several groups of wires that maybe will be pressed into little triangular waveform by stacked put merging after, send into second level pressure roller; The modulus of second level pressure roller tooth is 2.0～3.0, behind the pressure roller of the second level, wire is directly sent into the flattening-out pressure roller, promptly obtains the filter material that oil well sand control screen tube is used.
2. preparation method according to claim 1 is characterized in that: the wire of described several groups of individual layer laid parallels is the 2-5 group.
3. preparation method according to claim 1 and 2 is characterized in that: when wire diameter during at 0.05～0.08mm, the modulus of first order pressure roller tooth is 0.5; When wire diameter during below 0.15mm and greater than 0.08mm, the modulus of first order pressure roller tooth is 0.75; When wire diameter during below 0.2mm and greater than 0.15mm, the modulus of first order pressure roller tooth is 1.0.
4. the filter material used of oil well sand control screen tube is characterized in that: made by the described method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100473955A CN101260797B (en) | 2008-04-18 | 2008-04-18 | Filtering material for oil well sand preventing screen pipe and method for making same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100473955A CN101260797B (en) | 2008-04-18 | 2008-04-18 | Filtering material for oil well sand preventing screen pipe and method for making same |
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| Publication Number | Publication Date |
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| CN101260797A CN101260797A (en) | 2008-09-10 |
| CN101260797B true CN101260797B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100473955A Active CN101260797B (en) | 2008-04-18 | 2008-04-18 | Filtering material for oil well sand preventing screen pipe and method for making same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103225487B (en) * | 2013-04-23 | 2015-06-17 | 吉林大学 | Orifice anti-splashing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2164895Y (en) * | 1993-04-16 | 1994-05-18 | 于春林 | Corrosion-resistant wire tube filtering element for sand |
| US5938925A (en) * | 1997-01-23 | 1999-08-17 | Halliburton Energy Services, Inc. | Progressive gap sand control screen and process for manufacturing the same |
| CN2536786Y (en) * | 2002-03-12 | 2003-02-19 | 西安纳特石油技术有限责任公司 | Self-adjusting sandcontrol pipe |
-
2008
- 2008-04-18 CN CN2008100473955A patent/CN101260797B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2164895Y (en) * | 1993-04-16 | 1994-05-18 | 于春林 | Corrosion-resistant wire tube filtering element for sand |
| US5938925A (en) * | 1997-01-23 | 1999-08-17 | Halliburton Energy Services, Inc. | Progressive gap sand control screen and process for manufacturing the same |
| CN2536786Y (en) * | 2002-03-12 | 2003-02-19 | 西安纳特石油技术有限责任公司 | Self-adjusting sandcontrol pipe |
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| CN101260797A (en) | 2008-09-10 |
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