WO2013137781A2 - Downhole filter - Google Patents
Downhole filter Download PDFInfo
- Publication number
- WO2013137781A2 WO2013137781A2 PCT/RU2013/000177 RU2013000177W WO2013137781A2 WO 2013137781 A2 WO2013137781 A2 WO 2013137781A2 RU 2013000177 W RU2013000177 W RU 2013000177W WO 2013137781 A2 WO2013137781 A2 WO 2013137781A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- downhole
- discrete particles
- downhole filter
- polymer
- Prior art date
Links
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid 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
Definitions
- the invention relates to downhole filters used in oil production to prevent the removal of solids with recoverable reservoir fluid.
- the disadvantage of the filter is the high hydraulic resistance and increased loss of pressure of the pumped liquid, as well as the complexity and complexity of its manufacture.
- the downhole filter is characterized by the complexity of the design, the complexity of the formation of gravel packing and increased hydraulic losses.
- Well-known filters consisting of a perforated body and a set of flat corundum circles (A.S. N ° 981592 USSR, E21 B43 / 08, 1982) or plastic plates of different thicknesses (A.S. Ne 1530759 USSR, E 21 B 43/08, 1989) located between the pinch and centering rings and forming slots for fluid movement.
- a downhole filter containing a perforated frame, a drainage layer and filter elements in the form of polymer disks made of reinforced adhesive tape, on the adhesive side of which a layer of dispersed particles is fixed (Application N Q 201 1 105457/03 (07747), the decision to issue from 1 1 .01 .12).
- the well filter adopted for the prototype has a limited service life due to the small volume of voids between the dispersed particles, in which impurities are retained, and is also difficult to manufacture.
- the objective of the present invention is to increase operating time and reduce the complexity of manufacturing a well filter.
- the specified technical result is achieved by the fact that in a well filter containing a perforated frame, a drainage layer and filter elements in the form of thin polymer disks with discrete particles on one of the bases, according to the invention, the discrete particles are polymer pins of the same height, oriented perpendicular to the plane of the base.
- the polymer disks are mounted on top of each other so that the smooth base of one disk contacts the polymer pins of the adjacent disk.
- the smooth base of the polymer discs may be coated with adhesive to fix the polymer pins and maintain the size of the gaps between them.
- the number of pins per unit surface area of the polymer disk determines the distance between them and, accordingly, the dimensions of the bore sections in the radial plane of the disk, that is, the fineness of cleaning the downhole filter.
- figure 1 schematically shows a downhole filter, General view, section; on Figure 2 is a fragment of a cross section, a section aa of Figure 1.
- the filter consists of a tubular frame 1 with perforations 2, a three-dimensional drainage mesh 3 and polymer disks 4 with a central hole 5 ( Figure 1).
- On the upper base of the polymer disks 4 are randomly arranged with a gap 6 between each other polymer pins 7 of the same height, which are oriented perpendicular to the base.
- the preservation of the dimensions of the gaps 6 is achieved by means of clamping rings (not shown) mounted on the ends of the perforated frame 1.
- clamping rings (not shown) mounted on the ends of the perforated frame 1.
- labyrinth-like slots 8 of variable width are formed (FIG. 2).
- the drainage three-dimensional grid 3 is designed to improve the communication of the labyrinth-like slots 8 with perforations 2.
- the formation fluid flows from the well to the polymer disks 4 and is distributed along the labyrinth-like slots 8, when passing through which dispersed particles in the liquid are delayed between the polymer pins 7.
- the depth of penetration of particles into the labyrinth-like slots 8 depends on the ratio of particle sizes and gaps 6. If correctly the selected ratio, large particles accumulate outside the slots 8 with the formation of permeable structures that perform the function of an additional filter.
- the purified liquid from the slots 8 through a three-dimensional drainage grid 3 and perforation 2 enters the tubular frame 1 and is received by a submersible pump.
Landscapes
- 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)
- Filtering Materials (AREA)
Abstract
The invention relates to downhole filters usable in oil production for preventing mechanical impurities from being removed along with extractable stratal fluid. The technical result consists in increasing the service life and reducing the labour intensity of manufacturing a downhole filter. The downhole filter comprises a perforated body (1) and thin polymeric discs (4) with discrete particles which are attached to one of the bases thereof and form labyrinthiform channels (8) between one another. The discrete particles are in the form of polymeric pins (7) of identical height and oriented perpendicularly to the plane of the base.
Description
СКВАЖИННЫЙ ФИЛЬТР Borehole Filter
ОБЛАСТЬ ТЕХНИКИ FIELD OF TECHNOLOGY
Изобретение относится к скважинным фильтрам, применяемым в нефтедобыче для предотвращения выноса механических примесей с извлекаемой пластовой жидкостью. The invention relates to downhole filters used in oil production to prevent the removal of solids with recoverable reservoir fluid.
ПРЕДШЕСТВУЮЩИЙ УРОВЕНЬ ТЕХНИКИ BACKGROUND OF THE INVENTION
Известен скважинный фильтр, который содержит перфорированный корпус и фильтрующий элемент, состоящий из фильтрующих слоев и зернистого наполнителя и покрытый снаружи ворсистым материалом (А.с. Ns 587242 СССР, Е 21 В 43/08, 1978). Known well filter, which contains a perforated housing and a filter element consisting of filter layers and a granular filler and coated externally with a fluffy material (A.S. Ns 587242 USSR, E 21 B 43/08, 1978).
Недостаток фильтра заключается в высоком гидравлическом сопротивлении и повышенной потере напора откачиваемой жидкости, а также сложности и трудоемкости его изготовления. The disadvantage of the filter is the high hydraulic resistance and increased loss of pressure of the pumped liquid, as well as the complexity and complexity of its manufacture.
Известен скважинный фильтр, состоящий из перфорированной трубы, двух коаксиальных штампованных щелевых рубашек и слоя гравия в пространстве между ними (Штампованный щелевой фильтр с гравием РРК. ООО "Рос ПромСервис" //www.ruspr.ru). Known downhole filter, consisting of a perforated pipe, two coaxial stamped slotted shirts and a layer of gravel in the space between them (Stamped slotted filter with gravel RRK. LLC "Ros PromService" //www.ruspr.ru).
Скважинный фильтр характеризуется сложностью конструкции, трудоемкостью формирования гравийной набивки и повышенными гидравлическими потерями. The downhole filter is characterized by the complexity of the design, the complexity of the formation of gravel packing and increased hydraulic losses.
Известны скважинные фильтры, состоящие из перфорированного корпуса и набора плоских корундовых кругов (А.с. N° 981592 СССР, Е21 В43/08, 1982) или разнотолщинных пластмассовых дисков (А.с. Ne 1530759 СССР, Е 21 В 43/08, 1989), расположенных между поджимными и центрирующими кольцами и образующих щели для движения жидкости. Well-known filters consisting of a perforated body and a set of flat corundum circles (A.S. N ° 981592 USSR, E21 B43 / 08, 1982) or plastic plates of different thicknesses (A.S. Ne 1530759 USSR, E 21 B 43/08, 1989) located between the pinch and centering rings and forming slots for fluid movement.
Недостатками этих фильтров является низкая пропускная способность из-за невысокой площади фильтрации, равной суммарной ширине щелей, а также сложность и трудоемкость конструкции. The disadvantages of these filters are the low throughput due to the low filtration area equal to the total width of the slots, as well as the complexity and complexity of the design.
Наиболее близким к заявляемому является скважинный фильтр,
содержащий перфорированный каркас, дренажный слой и фильтрующие элементы в виде полимерных дисков из армированного скотча, на клейкой стороне которых закреплен слой дисперсных частиц (Заявка NQ 201 1 105457/03(07747), решение о выдаче от 1 1 .01 .12). Closest to the claimed is a downhole filter, containing a perforated frame, a drainage layer and filter elements in the form of polymer disks made of reinforced adhesive tape, on the adhesive side of which a layer of dispersed particles is fixed (Application N Q 201 1 105457/03 (07747), the decision to issue from 1 1 .01 .12).
Принятый за прототип скважинный фильтр имеет ограниченный ресурс работы из-за небольшого объема пустот между дисперсными частицами, в котором задерживаются примеси, а также сложен в изготовлении. The well filter adopted for the prototype has a limited service life due to the small volume of voids between the dispersed particles, in which impurities are retained, and is also difficult to manufacture.
СУЩНОСТЬ ИЗОБРЕТЕНИЯ SUMMARY OF THE INVENTION
Задачей настоящего изобретения является увеличение наработки и снижение трудоемкости изготовления скважинного фильтра. The objective of the present invention is to increase operating time and reduce the complexity of manufacturing a well filter.
Указанный технический результат достигается тем, что в скважинном фильтре, содержащем перфорированный каркас, дренажный слой и фильтрующие элементы в виде тонких полимерных дисков с дискретными частицами на одном из оснований, согласно изобретению, дискретные частицы представляют собой полимерные штырьки одинаковой высоты, ориентированные перпендикулярно плоскости основания. The specified technical result is achieved by the fact that in a well filter containing a perforated frame, a drainage layer and filter elements in the form of thin polymer disks with discrete particles on one of the bases, according to the invention, the discrete particles are polymer pins of the same height, oriented perpendicular to the plane of the base.
Полимерные диски устанавливаются друг на друге так, что гладкое основание одного диска контактирует с полимерными штырьками смежного диска. Гладкое основание полимерных дисков может быть покрыто адгезивом для фиксации полимерных штырьков и сохранения размеров зазоров между ними. The polymer disks are mounted on top of each other so that the smooth base of one disk contacts the polymer pins of the adjacent disk. The smooth base of the polymer discs may be coated with adhesive to fix the polymer pins and maintain the size of the gaps between them.
Количество штырьков на единице поверхности полимерного диска предопределяет расстояние между ними и соответственно размеры проходных сечений в радиальной плоскости диска, то есть тонкость очистки скважинного фильтра. The number of pins per unit surface area of the polymer disk determines the distance between them and, accordingly, the dimensions of the bore sections in the radial plane of the disk, that is, the fineness of cleaning the downhole filter.
КРАТКОЕ ОПИСАНИЕ ЧЕРТЕЖЕЙ BRIEF DESCRIPTION OF THE DRAWINGS
Сущность изобретения поясняется чертежами, где на Фиг.1 схематично изображен скважинный фильтр, общий вид, разрез; на
Фиг.2 - фрагмент поперечного сечения, разрез А-А Фиг.1. The invention is illustrated by drawings, where figure 1 schematically shows a downhole filter, General view, section; on Figure 2 is a fragment of a cross section, a section aa of Figure 1.
ОСУЩЕСТВЛЕНИЕ ИЗОБРЕТЕНИЯ DETAILED DESCRIPTION OF THE INVENTION
Фильтр состоит из трубчатого каркаса 1 с перфорациями 2, дренажной трехмерной сетки 3 и полимерных дисков 4 с центральным отверстием 5 (Фиг.1 ). На верхнем основании полимерных дисков 4 хаотически расположены с зазором 6 между собой полимерные штырьки 7 одинаковой высоты, которые ориентированы перпендикулярно основанию. Сохранение размеров зазоров 6 достигается с помощью поджимных колец (не показаны), установленных на концах перфорированного каркаса 1. В радиальной плоскости между полимерными штырьками 7 образуются лабиринтообразные щели 8 переменной ширины (Фиг.2). Дренажная трехмерная сетка 3 предназначена для улучшения сообщения лабиринтообразных щелей 8 с перфорациями 2. The filter consists of a tubular frame 1 with perforations 2, a three-dimensional drainage mesh 3 and polymer disks 4 with a central hole 5 (Figure 1). On the upper base of the polymer disks 4 are randomly arranged with a gap 6 between each other polymer pins 7 of the same height, which are oriented perpendicular to the base. The preservation of the dimensions of the gaps 6 is achieved by means of clamping rings (not shown) mounted on the ends of the perforated frame 1. In the radial plane between the polymer pins 7, labyrinth-like slots 8 of variable width are formed (FIG. 2). The drainage three-dimensional grid 3 is designed to improve the communication of the labyrinth-like slots 8 with perforations 2.
Скважинный фильтр работает следующим образом. Well filter works as follows.
Пластовая жидкость поступает из скважины к полимерным дискам 4 и распределяется по лабиринтообразным щелям 8, при прохождении через которые находящиеся в жидкости дисперсные частицы задерживаются между полимерными штырьками 7. Глубина проникновения частиц в лабиринтообразные щели 8 зависит от соотношения размеров частиц и величины зазоров 6. При правильно подобранном соотношении крупные частицы скапливаются снаружи щелей 8 с образованием проницаемых структур, выполняющих функцию дополнительного фильтра. Очищенная жидкость из щелей 8 через дренажную трехмерную сетку 3 и перфорации 2 попадает внутрь трубчатого каркаса 1 и оказывается на приеме погружного насоса. The formation fluid flows from the well to the polymer disks 4 and is distributed along the labyrinth-like slots 8, when passing through which dispersed particles in the liquid are delayed between the polymer pins 7. The depth of penetration of particles into the labyrinth-like slots 8 depends on the ratio of particle sizes and gaps 6. If correctly the selected ratio, large particles accumulate outside the slots 8 with the formation of permeable structures that perform the function of an additional filter. The purified liquid from the slots 8 through a three-dimensional drainage grid 3 and perforation 2 enters the tubular frame 1 and is received by a submersible pump.
Применение тонких полимерных дисков со стохастически распределенными в радиальной плоскости, но одинаково направленными перпендикулярно ей полимерными штырьками обеспечивает высокую удельную площадь фильтрации и сообщающуюся пористость фильтрующих элементов. Это, в свою
очередь, уменьшает потери давления, увеличивает пропускную способность, ресурс работы и грязеемкость скважинного фильтра.
The use of thin polymer disks with stochastically distributed in the radial plane, but equally oriented perpendicular to her polymer pins provides a high specific filtration area and communicating porosity of the filter elements. This, in its in turn, it reduces pressure losses, increases the throughput, service life and dirt capacity of the downhole filter.
Claims
1. Скважинный фильтр, содержащий перфорированный каркас и тонкие полимерные диски с присоединенными к одному из их оснований дискретными частицами, образующими между собой лабиринтообразные каналы, отличающийся тем, что дискретные частицы выполнены в виде полимерных штырьков одинаковой высоты, ориентированных перпендикулярно плоскости основания. 1. A downhole filter containing a perforated frame and thin polymer disks with discrete particles attached to one of their bases, forming labyrinth channels between them, characterized in that the discrete particles are made in the form of polymer pins of the same height, oriented perpendicular to the plane of the base.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012109018 | 2012-03-11 | ||
RU2012109018/03A RU2490431C1 (en) | 2012-03-11 | 2012-03-11 | Well strainer |
Publications (2)
Publication Number | Publication Date |
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WO2013137781A2 true WO2013137781A2 (en) | 2013-09-19 |
WO2013137781A3 WO2013137781A3 (en) | 2013-12-27 |
Family
ID=49161919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2013/000177 WO2013137781A2 (en) | 2012-03-11 | 2013-03-07 | Downhole filter |
Country Status (2)
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RU (1) | RU2490431C1 (en) |
WO (1) | WO2013137781A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10415351B2 (en) | 2014-07-30 | 2019-09-17 | 3M Innovative Properties Company | Separating device for removing solid particles from liquid and gas flows for high differential pressures |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1472648A1 (en) * | 1985-11-22 | 1989-04-15 | Азербайджанский государственный научно-исследовательский и проектный институт нефтяной промышленности | Slit-type deep-well filter |
SU1530759A1 (en) * | 1988-02-29 | 1989-12-23 | Предприятие П/Я М-5703 | Deep-well filter |
RU103842U1 (en) * | 2010-10-18 | 2011-04-27 | Айдар Иршатович Рахимкулов | FILTER WELL |
US20120018146A1 (en) * | 2010-03-31 | 2012-01-26 | Mærsk Olie Og Gas As | Wear-resistant separating device for removing sand and rock particles |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2321547C2 (en) * | 2006-03-15 | 2008-04-10 | Александр Иванович Аладкин | Oil-water centrifugal filtering separator |
CN201288607Y (en) * | 2008-11-24 | 2009-08-12 | 济南吉美乐电源技术有限公司 | Micro mute generator set |
-
2012
- 2012-03-11 RU RU2012109018/03A patent/RU2490431C1/en active
-
2013
- 2013-03-07 WO PCT/RU2013/000177 patent/WO2013137781A2/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1472648A1 (en) * | 1985-11-22 | 1989-04-15 | Азербайджанский государственный научно-исследовательский и проектный институт нефтяной промышленности | Slit-type deep-well filter |
SU1530759A1 (en) * | 1988-02-29 | 1989-12-23 | Предприятие П/Я М-5703 | Deep-well filter |
US20120018146A1 (en) * | 2010-03-31 | 2012-01-26 | Mærsk Olie Og Gas As | Wear-resistant separating device for removing sand and rock particles |
RU103842U1 (en) * | 2010-10-18 | 2011-04-27 | Айдар Иршатович Рахимкулов | FILTER WELL |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10415351B2 (en) | 2014-07-30 | 2019-09-17 | 3M Innovative Properties Company | Separating device for removing solid particles from liquid and gas flows for high differential pressures |
Also Published As
Publication number | Publication date |
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WO2013137781A3 (en) | 2013-12-27 |
RU2490431C1 (en) | 2013-08-20 |
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