US3822744A - Straining tube for pipe well - Google Patents

Straining tube for pipe well Download PDF

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Publication number
US3822744A
US3822744A US00290209A US29020972A US3822744A US 3822744 A US3822744 A US 3822744A US 00290209 A US00290209 A US 00290209A US 29020972 A US29020972 A US 29020972A US 3822744 A US3822744 A US 3822744A
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United States
Prior art keywords
rings
straining
tube
grooves
section
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Expired - Lifetime
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US00290209A
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English (en)
Inventor
V Reijonen
Y Reijonen
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
    • E03B3/08—Obtaining and confining water by means of wells
    • E03B3/16—Component parts of wells
    • E03B3/18—Well filters
    • E03B3/20—Well filters of elements of special shape

Definitions

  • ABSTRACT Straining tube for a pipe well consisting of separate [52] US. Cl. 166/235 rings mutually joined by means of rods and which are [51] Int. Cl E03b 3/18, E21b 43/00 eparated by spacers disposed between he located [58] Field of Search 166/235, 227, 236; a a distance from each other and the cross section of 137/544-550 which has the shape of a wedge tapering in the direction towards the interior of the tube.
  • References Cited the rings there are grooves for facilitating the entrance UNITED STATES PATENTS Of water into the straining tube.
  • a pipe well is understood to be a ground water well into which ground water flows from a region which is elongated in the height dimension of the well, so that water is obtained in profuse quantity. Depending on the depth of the well and on the abundance of ground water in the soil, several thousand litres, and sometimes even tens of thousands, of water per minute can be obtained.
  • Straining tubes of the kind mentioned above are known in prior art. It is not necessary that the pipe well is constructed as a straining tube over its entire height: the straining tube sections are placed at those depths where water is obtained.
  • the slit area of the straining tube section should be as large as possible.
  • the width of the slits or gaps is determined by the type of the soil.
  • the rings are tapered so as to make their cross section to be that of a wedge tapering in the direction towards the interior of the tube. The purpose of this is to prevent small stones having a size on the order of that of the gap from being lodged in the gap. Owing to the widening of the gap, any stones that enter the gap pass through and fall to the bottom of the tube. Stones slightly larger than the gap remain on the outside. Their accumulation in front of the gaps may reduce the hole area of the straining tube to such extent that it is no longer possible to obtain water in sufficient amount from the well.
  • the aim of thre present invention is to eliminate this drawback.
  • the invention is characterized in that on the surface of the rings grooves are provided for facilitating the entrance of water into the straining tube. Even if the gap between the rings of the straining tube should be completely blocked by small stones packed closely together, the grooves on the surfaces of the rings still form a multitude of small channels through which water is still able to flow into the tube. Hereby the hole area of a straining tube according to the invention remains adequate even when straining tubes known in prior art would be blocked.
  • the grooves are located on the peripheral surface of the rings and they are parallel with the axis of the rings. It has been found that even minor grooving considerably reduces the susceptibility to blocking of the straining tube.
  • the grooves are located on the upper and lower surface of the rings and they are radial.
  • the grooves need not necessarily extend over the whole width of the ring, because it is most important to ensure passage of the water at the narrowest point of the gap, which is encountered on the outer edge of the rings. Accordingly, in a third advantageous embodiment of the invention the grooves located on the upper and lower surfaces of the rings commence at the outer surface of the rings and they have a length less than the width of the rings.
  • the shape and size of the grooves should be appropriate in view of the soil type.
  • the shape of the grooves is such that the depth of the grooves is greater than their width.
  • the size of the grooves is, according to an advantageous embodiment, such that the width of the grooves is on the order of 0.1 to 1.0 mm.
  • the depth of the grooves is most advantageously about 1.0 mm and likewise the distance between grooves 1.0 mm.
  • the gap between the rings of the straining tube varies, depending on the diameter of the tube, in the range from 0.25 to 10 mm.
  • FIG. 1 shows the straining tube'of a pipe well in elevational view with exaggerated presentation of the width of the tube.
  • FIG. 2 shows the straining tube in cross section along the line Il--II in FIG. 1.
  • FIG. 3 shows the straining tube in elevational view in section along the line IIIIII in FIG. 2.
  • FIG. 4 shows the ring of a straining tube according to another embodiment in elevational view and in cross section.
  • the well shown in FIG. '1 consists of a tube mounted in a hole drilled in the ground, this tube having two straining sections at those depths where ground water is obtained.
  • the strainers have been formed of rings I placed one above the other and between which there remain gaps. The rings have been joined with each other and with the pipe part by binding rods 2.
  • FIG. 2 the cross section of the tube at the strainer part can be seen.
  • Three binding rods 2 pass through the rings 1, said rods being most appropriately made of acid-resistant steel.
  • spacers 3 have been formed on them at the points where the binding rods pass through and, in addition, three other supports 4.
  • the spacers 3 and supports 4 are equally spaced and in the parts of the upper and lower surfaces of the ring between them, as well as at the corresponding point on the outer circumference 6, numerous grooves 5 have been formed. For the sake of clarity, only a few grooves have been depicted in the drawing. In actual truth, the grooves are narrower and more closely spaced.
  • the section reproduced in FIG. 3 shows the longitudinal section of the straining tube passing through the grooves.
  • the wedge-shaped rings I hve been piled one upon the other and joined together and with the well pipe by binding rods 2.
  • the spacers 3 and supports 4 having an equivalent height keep the rings spaced at such distance that a suitable water gap remains between them.
  • the placing of the grooves 5 on the rings 1, on the outer circumference and at a corresponding point on the upper and lower surface can be seen from the figure.
  • the straining tube ring shown in FIG. 4 differs from the rings in FIG. 3 in that the grooves on the upper and lower surface of the ring 1, which begin at the outer rim 6, do not extend all the way across the ring up to its inner rim.
  • This embodiment is adequate in numerous instances, because if a stone should be wedged between the rings, it remains at the narrowest point of the gap, that is close to the outer circumference. It is then merely necessary to provide this particular point with It is obvious to one skilled in the art that different embodiments of the invention may vary within the scope of the claims presented farther below. For instance, the design of the rings may be different from what has been said.
  • the number of binding rods and of supports may vary. The number of grooves and their size are not restricted in any way either.
  • Improvement in a straining tube for a pipe well comprising an annular straining section extending in the axial direction of the straining tube, said straining section comprising a plurality of separate rings, rods extending through said rings and securing them to the remainder of the straining tube, spacers mounted between said rings and encircling said rods for spacing said rings apart, said rings having a wedge-shaped radial cross section with the radially extending surfaces of said rings diverging toward the radially outer surface of said rings.
  • each said groove comprises a groove section located on the radially outer circumferential surface of said rings and extending in parallel relationship with the axis of said rings, and at least one other groove section extending radially inwardly from the groove section on the radially outer circumferential surfaces and located in one of the tapering upper and lower sur faces of said rings.
  • Straining tube for a pipe well characterized in that the groove sections are located in each of the upper and lower tapering surfaces of said rings and the groove sections in the upper and lower surfaces extend radially inwardly from the radially outer circumferential surface of said rings for a dimension shorter than the radial width of said rings.
  • Straining tube for a pipe well characterized in that the width of the grooves is on the order of 0.1 to 1.0 mm.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Earth Drilling (AREA)
US00290209A 1971-10-11 1972-09-18 Straining tube for pipe well Expired - Lifetime US3822744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI712838A FI47001C (fi) 1971-10-11 1971-10-11 Putkikaivon siiviläputki.

Publications (1)

Publication Number Publication Date
US3822744A true US3822744A (en) 1974-07-09

Family

ID=8507666

Family Applications (1)

Application Number Title Priority Date Filing Date
US00290209A Expired - Lifetime US3822744A (en) 1971-10-11 1972-09-18 Straining tube for pipe well

Country Status (4)

Country Link
US (1) US3822744A (forum.php)
DE (1) DE2246747A1 (forum.php)
FI (1) FI47001C (forum.php)
SE (1) SE370743B (forum.php)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006830A1 (en) * 1978-07-04 1980-01-09 GÖKTEPE PLASTIK SANAYII ve TICARET ANONIM SIRKETI Plastic well screen and its connection system
US4752394A (en) * 1986-01-07 1988-06-21 Loadarm Australia Pty. Limited Bore screen
US5046892A (en) * 1988-06-07 1991-09-10 Kothmann Antonius B Apertured pipe segment
US5249626A (en) * 1992-06-11 1993-10-05 Lynn Gibbins Bottom hole well strainer
USD365139S (en) 1993-10-04 1995-12-12 Lynn Gibbins Bottom hole well strainer ring
US20100252250A1 (en) * 2009-04-07 2010-10-07 Halliburton Energy Services, Inc. Well Screens Constructed Utilizing Pre-Formed Annular Elements
US20110220347A1 (en) * 2008-11-18 2011-09-15 Esk Ceramics Gmbh & Co. Kg Separating device for removing sand and rock particles
US20120018146A1 (en) * 2010-03-31 2012-01-26 Mærsk Olie Og Gas As Wear-resistant separating device for removing sand and rock particles
US20120125601A1 (en) * 2009-07-20 2012-05-24 Maersk Olie Og Gas As Separating device for tubular flow-through devices
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD274461A1 (de) * 1988-07-29 1989-12-20 Projekt Wasserwirtschaft Veb Filterrohr fuer infiltrations- und entnahmebrunnen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1674084A (en) * 1926-10-25 1928-06-19 Austin George Concrete screen for water wells
US1886121A (en) * 1920-11-04 1932-11-01 Chester E Records Well screen
US2250871A (en) * 1938-09-27 1941-07-29 Johns Manville Well screen
US2314477A (en) * 1940-11-25 1943-03-23 Edward E Johnson Inc Well screen having water contacting surfaces formed of plastic material
DE2016383A1 (de) * 1969-11-21 1971-05-27 Reijonen, Yr o, Reijonen, Veh, Helsinki Siebrohr fur Rohrbrunnen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886121A (en) * 1920-11-04 1932-11-01 Chester E Records Well screen
US1674084A (en) * 1926-10-25 1928-06-19 Austin George Concrete screen for water wells
US2250871A (en) * 1938-09-27 1941-07-29 Johns Manville Well screen
US2314477A (en) * 1940-11-25 1943-03-23 Edward E Johnson Inc Well screen having water contacting surfaces formed of plastic material
DE2016383A1 (de) * 1969-11-21 1971-05-27 Reijonen, Yr o, Reijonen, Veh, Helsinki Siebrohr fur Rohrbrunnen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006830A1 (en) * 1978-07-04 1980-01-09 GÖKTEPE PLASTIK SANAYII ve TICARET ANONIM SIRKETI Plastic well screen and its connection system
US4752394A (en) * 1986-01-07 1988-06-21 Loadarm Australia Pty. Limited Bore screen
US5046892A (en) * 1988-06-07 1991-09-10 Kothmann Antonius B Apertured pipe segment
US5249626A (en) * 1992-06-11 1993-10-05 Lynn Gibbins Bottom hole well strainer
USD365139S (en) 1993-10-04 1995-12-12 Lynn Gibbins Bottom hole well strainer ring
US20110220347A1 (en) * 2008-11-18 2011-09-15 Esk Ceramics Gmbh & Co. Kg Separating device for removing sand and rock particles
US8893781B2 (en) 2008-11-18 2014-11-25 Esk Ceramics Gmbh & Co. Kg Separating device for removing sand and rock particles
US20100252250A1 (en) * 2009-04-07 2010-10-07 Halliburton Energy Services, Inc. Well Screens Constructed Utilizing Pre-Formed Annular Elements
US8196653B2 (en) * 2009-04-07 2012-06-12 Halliburton Energy Services, Inc. Well screens constructed utilizing pre-formed annular elements
US8302681B2 (en) 2009-04-07 2012-11-06 Halliburton Energy Services, Inc. Well screens constructed utilizing pre-formed annular elements
US20120125601A1 (en) * 2009-07-20 2012-05-24 Maersk Olie Og Gas As Separating device for tubular flow-through devices
US8833447B2 (en) * 2009-07-20 2014-09-16 Esk Ceramics Gmbh & Co. Kg Separating device for tubular flow-through devices
US20120018146A1 (en) * 2010-03-31 2012-01-26 Mærsk Olie Og Gas As Wear-resistant separating device for removing sand and rock particles
US8662167B2 (en) * 2010-03-31 2014-03-04 Esk Ceramics Gmbh & Co. Kg Wear-resistant separating device for removing sand and rock particles
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
FI47001C (fi) 1973-08-10
FI47001B (forum.php) 1973-05-02
SE370743B (forum.php) 1974-10-28
DE2246747A1 (de) 1973-04-19

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