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WO2000047867A1 - Dispositif de filtre a sable utilise dans la recuperation d'huile de gaz et d'eau - Google Patents

Dispositif de filtre a sable utilise dans la recuperation d'huile de gaz et d'eau Download PDF

Info

Publication number
WO2000047867A1
WO2000047867A1 PCT/NO2000/000037 NO0000037W WO0047867A1 WO 2000047867 A1 WO2000047867 A1 WO 2000047867A1 NO 0000037 W NO0000037 W NO 0000037W WO 0047867 A1 WO0047867 A1 WO 0047867A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
sand filter
tubular
slots
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/NO2000/000037
Other languages
English (en)
Inventor
Kjartan Roaldsnes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU25817/00A priority Critical patent/AU2581700A/en
Priority to GB0121058A priority patent/GB2364540A/en
Publication of WO2000047867A1 publication Critical patent/WO2000047867A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

  • This invention relates to sand filters/screens of the kind shaped and designed with a view of retaining sand particles, etc., but letting through water/oil when in the course of recovering water or petroleum deposits.
  • the sand filter or sand screen comprises, preferably, an inner perforated pipe which, through spacer means, is attached to an outer, annular screen body assembled of annular, appropriately profiled threads, preferably in the form of a thread wound or coiled, following a helical course around the inner pipe leaving intermediate, through-going slots along the pipe wall.
  • said threads have a solid, polygonal, e.g. triangular, cross section, and the thread windings are placed laterally of each other with a certain spacing therebetween, said spacing - from a radially outer minimum distance where a very narrow inlet slot is formed, for e.g. oil from the surrounding formation in the reservoir, to an outlet slot for oil at the pipe body's inner jacket face.
  • the outer inlet slot is so narrow that sand particles and other undesired particles which may accompany the oil, are prevented from entering the sand filter.
  • the cross- sectional shape has a circumference corresponding to an isosceles triangle having a relatively short base line in relation to the sides, so that the angle at the apex is about 30°, and the apex corner itself is somewhat rounded.
  • the inner perforated pipe is rotated during the helical winding of the profiled thread which, a plurality of times per thread winding, is welded firmly to the free outer end edges of said spacer means in the form of longitudinal moulds.
  • a special bit cuts itself through the casing, making an elongate hole therein.
  • the hole in the casing will leave a sharp edge on which the wound screen body of the sand filter may get hooked, so that a longitudinal portion of the sand filter is destroyed, the annular threads being pressed against each other at one local portion, their intermediate slots opening up and forming irregularly large screen openings where sand particles later easily may pass when the well is set in production.
  • a perforated sleeve is placed outside the sand filter.
  • This screen sleeve can, indeed, to some extent reduce said disadvantages through a strengthening of the sand filter in relation to e.g. said casing hole but introduces, thus, other problems.
  • This known outer screen sleeve surrounding the inner screen pipe of the known sand filter is also sensible to the risk of damage represented by the sharp hole edge in the casing and, furthermore, the screen sleeve causes the clear disadvantage of increased weight and width dimension being added to the sand filter.
  • Such sand filters may be rather long, e.g. from 500 to 1500 meters, and said weight increase may be quite substantial.
  • an important object of the invention has been to provide a sand filter of the kind concerned which resists external influences of an entirely other order than known sand filters of corresponding dimensions.
  • a sand filter in accordance with the preamble of claim 1 is shaped and designed such that it exhibits the distinctive features as defined in the characterizing clause of claim 1.
  • the profiled thread is formed with cut out side portions, each such cavity (cut out portion) extending along a fraction of a thread winding, so that - when the opposed sides of the thread windings (radially) outermost are placed resting against each other - slots will be formed; the slots may, but do not have to, be aligned with each other in the longitudinal and/or lateral direction of the screen pipe.
  • the radially through-going, local slots formed during the winding of the screen thread may e.g. be ordered in rows in the circumferential direction of the screen body, the rows being displaced parallelly in relation to each other, slopingly orientated in relation to s the pipe axis of the screen body.
  • a typical slot aperture may be 0.2 - 0.4 millimeters.
  • the mechanical strength of a sand filter built up on such an outer screen body is substantially larger than the one of known and conventional sand filters, and this is due to that o the thread windings extending along a helical course, rest supportingly against each other along a substantial portion of their longitudinal extent, i.e. in the circumferential direction of the screen body. Due to manufacturing-technical causes, there may exist 1/100 millimeter spacing intermediate 5 the thread windings.
  • the cross section in a thread cross section substantially corresponding to an isosceles triangle, it will be advantageous to form the cross section so that it closest to the base line exhibits two parallel, straight side o portions, forming longitudinal shoulder portions of the profiled thread.
  • the longitudinal edge cavities are formed in one or both shoulder portions, while the portions intermediate the edge cavities will rest against the neighbour shoulder portions, allotting the outer screen body of the sand filter a substantial mechanical strength.
  • Said substantially isosceles triangle cross section having substantially parallel side portions outermost is not critical for the achievement of the function and object of the invention.
  • other cross-sectional shapes of the profiled thread may be considered, e.g. having circular circumference .
  • Figure 1 shows a vertical section through a formation in which, through a vertical bore hole with casing, by means of a special bit, a deviation hole has been drilled, whereby an elongate hole in the casing has been formed;
  • Figure 2 shows, on a larger scale, a partial perspective view of a sand filter having an outer tubular screen body built up of profiled thread according to the invention, welded to outer ends of radial spacers known per se and resting with their inner ends against a perforated pipe;
  • Figure 3 corresponds to figure 2 , but shows a variant of a sand filter without perforated inner pipe
  • Figure 4 shows in side elevation view a short longitudinal portion of the outer tubular screen body of a sand filter
  • Figure 5 shows a section from figure 4 , on a larger scale
  • Figure 6 corresponds to figure 4 , but shows another positioning of the rows of through-going slots aligned in the circumferential direction;
  • Figures 7-11 each shows lateral cross-section through four adjacent thread windings, in each single case formed in accordance with the present invention, in that
  • Figure 7 shows four adjacent thread windings included as outer tubular member in a sand filter of the kind concerned, wherein the thread cross section, except from the edge cavities according to the invention, is of a known type;
  • Figure 8 corresponds to figure 7, but shows another thread cross section in accordance with the sectional line VIII - VIII in figure 5;
  • Figure 9 corresponds to figure 8, but shows another thread cross section, especially at the radially outer face which, here, is slightly rounded;
  • Figure 10 shows the same thread cross section as figure 8, but here the section is positioned at X - X in figure 5, so that the slot-forming edge cavities can not be seen; on the other hand, it appears that opposing side face portions (shoulder portions) of adjacent thread windings are resting supportingly against each other, confer figure 4; and
  • Figure 11 illustrates a usable, but less actual thread cross section, namely circular.
  • Figure 12 corresponds to figure 10, but shows a section on a significantly larger scale.
  • figure 1 in a layout view illustrates a portion of a well in which sand filters of the kind concerned may be subjected to great strains.
  • a casing 12 is set and firmly cemented. Within the latter, a long, narrow wedge has been driven, the wedge tapering in an upward direction, serving as a guiding body when drilling a deviation hole 14.
  • the deviation drilling is carried out with a special bit which will make a very elongated hole in the casing.
  • the length of the casing hole in the vertical direction is indicated at 16.
  • edges of the casing around the longitudinal hole traditionally create great strains in the sand filter when it is passed through the hole aperture.
  • the outer tubular screen body of the filter built up of said spun/wound thread having through-going inlet slots along its entire winding length, so that the thread windings are forced out of their intended positions, opening some intermediate inlet slots in such a degree that sand particles later can flow therethrough.
  • Figures 2 and 3 shows perspective views of a short portion of the general constructive assembly of such sand filters.
  • such a sand filter comprises an inner pipe 18 formed with radially through-going holes 20.
  • Onto the perforated inner pipe 18 is externally disposed a number of radial/axial spacers 22 in the form of short, longitudinal moulds distributed equidistantly in the circumferential direction of the inner pipe 18.
  • such spacer moulds 22 may be disposed equidistantly around the axis of the sand filter.
  • the spacer moulds and the later to be mentioned, outer, tubular screen body consist of materials/metals weldable to each other. The way of joining is not subject matter for this invention; neither the shape or design of the perforated inner pipe 18 or the spacer moulds 22.
  • the outer, tubular screen body 24 is built up of 360° extending windings of profiled thread 26.
  • the main shape of this cross section is a isosceles triangle where the side portions 28b positioned closest to the base line are substantially parallel, see especially figure 10 where the section X - X in figure 5 is placed outside the circumferentially broken, slot- forming edge cavities 30b, figure 8.
  • the slots 30 in relation to figures 4 and 5 are placed such that they are not aligned in the longitudinal axial direction of the tubular sand filter 18,22,24, but are parallel displaced row by row.
  • edge cavities/slots 30a are formed, e.g. placed and distributed as indicated in figures 2 and 3 for the slots 30.
  • each of the outer faces 32 of the thread windings has a certain curvature in the circumferential direction.
  • Sand filters having such a surface will easier slide along pipe walls/formations for wells/edges, etc.
  • Figure 10 shows the same cross- sectional shape as figure 8 section VIII - VIII in figure 5) and illustrates the large land faces of opposing thread side portions which rest against each other in this embodiment.
  • Figure 12 shows the same cross-sectional shape as figure 10, but on a significantly larger scale, and illustrates that between two thread windings 28b, a very narrow slot 29 exists between opposing side face portions.
  • the spacing 29 is due to the production process which often does not allow that the thread windings 26b rest directly supportingly against each other.
  • the distance between the thread windings 29 may be 1/100 millimeters.
  • the outer tubular screen body of the sand filter may, following a known method, be formed by one single thread which, during the rotation of the inner pipe 18, is spun/wound around it helically, adjacent shoulder portion faces 28 on the thread windings 26 (between the slots 30) resting approximately supportingly against each other, during continuous welding onto the outer ends of the spacer moulds 22.
  • edge cavities are converted into closed slots 30, see e.g. figures 2 and 3.
  • the edge cavities may be cut out, e.g. milled out, just before the thread 26 is welded to the spacer moulds 22.
  • the thread 26 may be prefabricated including the desired edge cavities.
  • edge cavities 30 is longer than the radial extent of the shoulder portions 28. It appears from figures 8 and 9 that the edge cavities 30b and 30c, respectively, in both cases have a radial extent exceeding the shoulder portions 28b and 28c, respectively, in the same direction.
  • the edge cavities forming the slots 30 widen inwardly in radial direction, so that a sand granule which in the first place has passed in through the inlet portion of the slot 30, is not allowed to get wedged.

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)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne un filtre à sable tubulaire destiné à être utilisé dans la récupération d'eau, de gaz et d'huile et conçu de manière à laisser passer l'eau/huile, mais non le sable, à travers des fentes radiales disposées entre des enroulements à filet (26) dont le corps-écran tubulaire extérieur (24) du filtre est constitué. De manière à assurer une résistance mécanique élevée, des cavités d'extrémité pratiquées dans l'enroulement à filet, distribuées dans le sens longitudinal, forment, lors de l'assemblage du corps-écran (24) sous forme tubulaire, des fentes (30) de longueur réduite. Les parties des faces latérales (28) d'enroulements à filet (26) adjacents prennent appui l'une sur l'autre, la force d'appui étant dirigée dans la direction de l'axe longitudinal et contribuent à augmenter les propriétés de résistance mécanique du filtre à sable.
PCT/NO2000/000037 1999-02-15 2000-02-03 Dispositif de filtre a sable utilise dans la recuperation d'huile de gaz et d'eau Ceased WO2000047867A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU25817/00A AU2581700A (en) 1999-02-15 2000-02-03 Sandfilter device for use in the recovery of oil, gas and water
GB0121058A GB2364540A (en) 1999-02-15 2000-02-03 Sandfilter device for use in the recovery of oil gas and water

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO990711A NO309395B1 (no) 1999-02-15 1999-02-15 Sandfilter til bruk i en brönn
NO19990711 1999-02-15

Publications (1)

Publication Number Publication Date
WO2000047867A1 true WO2000047867A1 (fr) 2000-08-17

Family

ID=19902962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2000/000037 Ceased WO2000047867A1 (fr) 1999-02-15 2000-02-03 Dispositif de filtre a sable utilise dans la recuperation d'huile de gaz et d'eau

Country Status (4)

Country Link
AU (1) AU2581700A (fr)
GB (1) GB2364540A (fr)
NO (1) NO309395B1 (fr)
WO (1) WO2000047867A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6644412B2 (en) 2001-04-25 2003-11-11 Weatherford/Lamb, Inc. Flow control apparatus for use in a wellbore
US7048061B2 (en) 2003-02-21 2006-05-23 Weatherford/Lamb, Inc. Screen assembly with flow through connectors
CN105064960A (zh) * 2015-08-26 2015-11-18 武汉海王机电工程技术公司 反向滤缝式耐高压滤砂筒及其制作方法
RU2616952C1 (ru) * 2014-10-20 2017-04-18 Чайна Юниверсити Оф Петролиум (Ист Чайна) Подвижная комбинированная труба для борьбы с пескопроявлением, содержащая фильтры с осевыми и радиальными щелями
WO2018053176A1 (fr) * 2016-09-15 2018-03-22 Bryant Alan Arterbury Conception de crépine de puits pour maîtrise améliorée de filtration de flux horizontal
CN109386257A (zh) * 2017-08-02 2019-02-26 陕西汇丰悦石油科技开发有限公司 一种井下防砂器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105863577A (zh) * 2016-05-11 2016-08-17 四川行之智汇知识产权运营有限公司 水平完井用的防砂筛管
CN105863579A (zh) * 2016-05-11 2016-08-17 四川行之智汇知识产权运营有限公司 一种稠油水平井热采用的生产管柱

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339898A (en) * 1917-03-17 1920-05-11 Mahlon E Layne Well-screen
US1845265A (en) * 1929-07-24 1932-02-16 Fred I Getty Well screen
US3709293A (en) * 1971-02-22 1973-01-09 Layne & Bowler Co Wire wrapped well screen
US4299283A (en) * 1980-06-26 1981-11-10 Reese Enterprises, Inc. Strip structure for well screen
JPS61289915A (ja) * 1985-06-18 1986-12-19 Sumitomo Metal Ind Ltd ストレ−ナ管の製造方法
US4657079A (en) * 1980-12-11 1987-04-14 Nagaoka Kanaai Kabushiki Kaisha Screen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339898A (en) * 1917-03-17 1920-05-11 Mahlon E Layne Well-screen
US1845265A (en) * 1929-07-24 1932-02-16 Fred I Getty Well screen
US3709293A (en) * 1971-02-22 1973-01-09 Layne & Bowler Co Wire wrapped well screen
US4299283A (en) * 1980-06-26 1981-11-10 Reese Enterprises, Inc. Strip structure for well screen
US4657079A (en) * 1980-12-11 1987-04-14 Nagaoka Kanaai Kabushiki Kaisha Screen
JPS61289915A (ja) * 1985-06-18 1986-12-19 Sumitomo Metal Ind Ltd ストレ−ナ管の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6644412B2 (en) 2001-04-25 2003-11-11 Weatherford/Lamb, Inc. Flow control apparatus for use in a wellbore
US6883613B2 (en) 2001-04-25 2005-04-26 Weatherford/Lamb, Inc. Flow control apparatus for use in a wellbore
US7059401B2 (en) 2001-04-25 2006-06-13 Weatherford/Lamb, Inc. Flow control apparatus for use in a wellbore
US7048061B2 (en) 2003-02-21 2006-05-23 Weatherford/Lamb, Inc. Screen assembly with flow through connectors
RU2616952C1 (ru) * 2014-10-20 2017-04-18 Чайна Юниверсити Оф Петролиум (Ист Чайна) Подвижная комбинированная труба для борьбы с пескопроявлением, содержащая фильтры с осевыми и радиальными щелями
CN105064960A (zh) * 2015-08-26 2015-11-18 武汉海王机电工程技术公司 反向滤缝式耐高压滤砂筒及其制作方法
WO2018053176A1 (fr) * 2016-09-15 2018-03-22 Bryant Alan Arterbury Conception de crépine de puits pour maîtrise améliorée de filtration de flux horizontal
CN109386257A (zh) * 2017-08-02 2019-02-26 陕西汇丰悦石油科技开发有限公司 一种井下防砂器

Also Published As

Publication number Publication date
NO990711D0 (no) 1999-02-15
GB2364540A (en) 2002-01-30
AU2581700A (en) 2000-08-29
GB0121058D0 (en) 2001-10-24
NO990711L (no) 2000-08-16
NO309395B1 (no) 2001-01-22

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