US3844347A - Well pipe - Google Patents

Well pipe Download PDF

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Publication number
US3844347A
US3844347A US00382744A US38274473A US3844347A US 3844347 A US3844347 A US 3844347A US 00382744 A US00382744 A US 00382744A US 38274473 A US38274473 A US 38274473A US 3844347 A US3844347 A US 3844347A
Authority
US
United States
Prior art keywords
pipe
section
well pipe
well
slots
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.)
Expired - Lifetime
Application number
US00382744A
Other languages
English (en)
Inventor
V Vaer
F Stotzel
E Dobbeler
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.)
Schaubstahl Werke KG
Original Assignee
Schaubstahl Werke KG
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
Priority to DE19702037478 priority Critical patent/DE2037478A1/de
Priority to FR7126433A priority patent/FR2103089A5/fr
Priority to BE770180A priority patent/BE770180A/fr
Priority to GB34173/71A priority patent/GB1285309A/en
Application filed by Schaubstahl Werke KG filed Critical Schaubstahl Werke KG
Priority to US00382744A priority patent/US3844347A/en
Application granted granted Critical
Publication of US3844347A publication Critical patent/US3844347A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B43/086—Screens with preformed openings, e.g. slotted liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements

Definitions

  • ABSTRACT A well pipe having elongated slots which are bridged by webs of sheet material, a group of the slots being arranged longitudinally of the pipe and another group extending circumferentially.
  • the walls of well pipes are usually constructed with a number of holes shaped as elongated apertures positioned parallel to each other. They have their outer ends connected to the wall of the pipe by material pressed out of the wall and their long sides are free and extend parallel to the corresponding sides of the other slots. Such bridged-over slots have two openings per slot, so that the number of entrance openings is double that of normal perforations.
  • An outstanding characteristic is that the strength of the well pipes is increased due to the pressed-out or staked web of material.
  • the necessary weakening of the walls because of the perforations may be at least partially compensated for by the bridging-over of the slots.
  • the material web pressed out of the pipe wall increases the moment of resistance and, therefore, contributes to an increase of strength.
  • these bridged-over slots are arranged parallel to each other in such a way that the direction of elongation of the slots and of the material webs pressed out of the holes run parallel to the length of the pipe, since by this arrangement the greatest stability is achieved. In special cases, the requirements for stability are lowered. For example, at a construction site it is common to use the so-called lost pipes which have a smaller wall thickness than the normal wall pipe and in which slotted holes are arranged which extend circumferentially of the pipe.
  • Another object of this invention is the provision of a well pipe having a large number of flow apertures without loss of strength.
  • a further object of the present invention is the provision of a well pipe having a plurality of apertures, each of which is protected by a bridge of metal.
  • the invention has to do with a well pipe which has elongated holes or slots and with the same wall thickness shows increased stability. It will provide equal stability with a smaller wall thickness than commonly used in well pipes.
  • This is achieved by arranging sections longitudinally of the pipe where one section consists of slots extending longitudinally of the pipe and the following section contains slots arranged circumferentially of the pipe. It has been found to be of advantage to make the length of the first slot section (with holes parallel to the pipe axis) a multiple of the length of the second pipe section (with circumferential- Iy-oriented slots). It has also been found to be of advantage to equip the second pipe section with up to six parallel rows of slots in the circumferential direction.
  • the well pipes consist of at least three sections arranged longitudinally of the pipe, wherein the section having slots oriented circumferentially is positioned between two sections with the slots arranged longitudinally of the pipe axis.
  • FIG. 1 is a front elevational view of a well pipe making use of the principles of the present invention and having a threaded connection,
  • FIG. 2 shows a modified form of the well pipe having a flanged connection
  • FIG. 3 is an enlarged perspective view of a portion of the well pipe taken in the section III indicated in FIG. 1.
  • FIG. 1 shows a well pipe 1 which is equipped on both ends 2 and 3 with threads to serve as a connection with other well pipes by means of couplings.
  • the surface of the pipe 1 is perforated by bridged slots formed by punching or staking.
  • FIG. 3 showing an enlargement of a section III of the pipe wall, the slots 5 and the web 6 pressed out of the wall material are arranged parallel to the axis of the pipe and form a first section 4.
  • the neighboring rows of slots are displaced by a half space.
  • the slots 8 and the webs 9 punched from the wall material are arranged circum ferentially.
  • a section 10 of the first type follows in which the slots and the webs are again arranged in the direction of the pipe axis.
  • the middle section 7 of the secondary type which actually acts as a corrugated stiffener
  • a considerable increase of the moment of resistance of the pipe wall about its axis is achieved and with it a considerable stiffening of the pipe cross-section.
  • the two end portions of the well pipe are reinforced anyway by means of the couplings which are screwed onto the ends 2 and 3.
  • the important parts of the pipe surface namely the sections 4 and have the slots and webs arranged longitudinally of the pipe axis, so that they support the stability of the well pipe in the direction of the length. It has been found to be sufficient for achieving the desired cross-sectional stability to construct the second section with only a small width, which permits about two to six parallel rows of slots. For practical purposes, the neighboring parallel rows of slots are also displaced by a half space, as shown in the preferred embodiment.
  • FIG. 2 shows such a design in which two sections 14 of the secondary type are arranged between the sections 11, 12, and 13 of the first type.
  • a corresponding further sub-division with further sections of the secondary type can be arranged.
  • the slots 5 and the webs 6 are oriented lengthwise of the axis of the pipe and the slots 8 and their webs 9 of the section 14 of the secondary type are oriented circumferentially of the well pipe.
  • the sections of the first and second type are different considerably from each other in their length.
  • the sections of the first type are always the same length and the sections of the secondary type are also of the same length.
  • the example shown in FIG. 2 is based on the fact that the sections 11 and 13 of the first type positioned at the ends receive a considerable stiffening by the connecting flanges l5 and 16. Based on this fact, the outer sections 11 and 13 of the first type are made longer than the middle section 12 lying between the end sections.
  • the cross-sectional stability of a well pipe is considerably improved without the stability in the longitudinal direction being noticeably influenced.
  • the well pipes receive a considerably higher cross-sectional stability by retaining the wall material, by retaining the wall thickness, and also by keeping the type of slotted perforations, as compared to the common well pipes and, therefore, they have a greater security against crosssectional deformations. Since the design and especially the wall thickness of prior art well pipes is often dictated by the need for cross-section stability, it is now possible to use pipes with a reduced wall thickness. Consequently, considerable material savings result and expenditures are lowered.
  • a well pipe as recited in claim 1 characterized by the fact that the second section contains up to six parallel rows of holes. 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US00382744A 1970-07-29 1973-07-26 Well pipe Expired - Lifetime US3844347A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19702037478 DE2037478A1 (de) 1970-07-29 1970-07-29 Schhtzbruckenlochungen aufweisendes Brunnenrohr
FR7126433A FR2103089A5 (fr) 1970-07-29 1971-07-19
BE770180A BE770180A (fr) 1970-07-29 1971-07-19 Tube filtrant presentant des perforations a nervure repoussee
GB34173/71A GB1285309A (en) 1970-07-29 1971-07-21 Sprinkler pipe
US00382744A US3844347A (en) 1970-07-29 1973-07-26 Well pipe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19702037478 DE2037478A1 (de) 1970-07-29 1970-07-29 Schhtzbruckenlochungen aufweisendes Brunnenrohr
US16432771A 1971-07-20 1971-07-20
US00382744A US3844347A (en) 1970-07-29 1973-07-26 Well pipe

Publications (1)

Publication Number Publication Date
US3844347A true US3844347A (en) 1974-10-29

Family

ID=27182770

Family Applications (1)

Application Number Title Priority Date Filing Date
US00382744A Expired - Lifetime US3844347A (en) 1970-07-29 1973-07-26 Well pipe

Country Status (5)

Country Link
US (1) US3844347A (fr)
BE (1) BE770180A (fr)
DE (1) DE2037478A1 (fr)
FR (1) FR2103089A5 (fr)
GB (1) GB1285309A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042176A2 (fr) * 1980-06-18 1981-12-23 Meissner Manufacturing Company, Inc. Cartouche filtrante et méthode pour sa construction
US4343359A (en) * 1980-09-18 1982-08-10 Krause Horst J Perforated pipe
FR2555215A1 (fr) * 1983-11-23 1985-05-24 Indumat Sa Dispositif de recuperation d'un liquide
US6755005B2 (en) * 2001-08-10 2004-06-29 General Electric Company Method and apparatus for stiffening and apparatus
EP1970527A2 (fr) 2007-03-10 2008-09-17 Stüwa Konrad Stükerjürgen GmbH Tuyau en acier doté d'une zone de filtre pour puits de forage
US20100243239A1 (en) * 2009-03-31 2010-09-30 Conocophillips Company Compaction Tolerant Basepipe for Hydrocarbon Production
US20130199994A1 (en) * 2010-08-23 2013-08-08 Hyosung Corporation Submerged hollow fiber membrane module
US20140182853A1 (en) * 2012-12-27 2014-07-03 Tesco Corporation Downhole slot cutter
EP3903901A1 (fr) * 2020-04-28 2021-11-03 Hamilton Sundstrand Corporation Filtre avec section conforme

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1169689A (en) * 1914-07-23 1916-01-25 Andrew Smith Drainage-casing for culverts, drain-tiling, wells, &c.
US1821659A (en) * 1930-08-01 1931-09-01 Jr Joseph Henry Mcevoy Well strainer
US2043225A (en) * 1935-07-05 1936-06-09 Arthur L Armentrout Method and apparatus for testing the productivity of the formation in wells
US2059939A (en) * 1934-05-19 1936-11-03 Freman E Fairfield Self-cleaning well liner and the like
US2158569A (en) * 1938-05-24 1939-05-16 Western Gulf Oil Company Formation tester
DE1297040B (de) * 1966-04-05 1969-06-04 Winden & Co Gmbh Sickerleitungsrohr, insbesondere aus Kunststoff

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1169689A (en) * 1914-07-23 1916-01-25 Andrew Smith Drainage-casing for culverts, drain-tiling, wells, &c.
US1821659A (en) * 1930-08-01 1931-09-01 Jr Joseph Henry Mcevoy Well strainer
US2059939A (en) * 1934-05-19 1936-11-03 Freman E Fairfield Self-cleaning well liner and the like
US2043225A (en) * 1935-07-05 1936-06-09 Arthur L Armentrout Method and apparatus for testing the productivity of the formation in wells
US2158569A (en) * 1938-05-24 1939-05-16 Western Gulf Oil Company Formation tester
DE1297040B (de) * 1966-04-05 1969-06-04 Winden & Co Gmbh Sickerleitungsrohr, insbesondere aus Kunststoff

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042176A3 (fr) * 1980-06-18 1982-04-28 Meissner Manufacturing Company, Inc. Cartouche filtrante et méthode pour sa construction
EP0042176A2 (fr) * 1980-06-18 1981-12-23 Meissner Manufacturing Company, Inc. Cartouche filtrante et méthode pour sa construction
US4343359A (en) * 1980-09-18 1982-08-10 Krause Horst J Perforated pipe
FR2555215A1 (fr) * 1983-11-23 1985-05-24 Indumat Sa Dispositif de recuperation d'un liquide
US6755005B2 (en) * 2001-08-10 2004-06-29 General Electric Company Method and apparatus for stiffening and apparatus
EP1970527A3 (fr) * 2007-03-10 2012-02-15 Stüwa Konrad Stükerjürgen GmbH Tuyau en acier doté d'une zone de filtre pour puits de forage
EP1970527A2 (fr) 2007-03-10 2008-09-17 Stüwa Konrad Stükerjürgen GmbH Tuyau en acier doté d'une zone de filtre pour puits de forage
US20100243239A1 (en) * 2009-03-31 2010-09-30 Conocophillips Company Compaction Tolerant Basepipe for Hydrocarbon Production
US8479811B2 (en) * 2009-03-31 2013-07-09 Conocophillips Company Compaction tolerant basepipe for hydrocarbon production
US20130199994A1 (en) * 2010-08-23 2013-08-08 Hyosung Corporation Submerged hollow fiber membrane module
US9561472B2 (en) * 2010-08-23 2017-02-07 Hyosung Corporation Submerged hollow fiber membrane module
US20140182853A1 (en) * 2012-12-27 2014-07-03 Tesco Corporation Downhole slot cutter
US9273540B2 (en) * 2012-12-27 2016-03-01 Tesco Corporation Downhole slot cutter
US9932802B2 (en) 2012-12-27 2018-04-03 Nabors Drilling Technologies Usa, Inc. Downhole slot cutter
EP3903901A1 (fr) * 2020-04-28 2021-11-03 Hamilton Sundstrand Corporation Filtre avec section conforme

Also Published As

Publication number Publication date
GB1285309A (en) 1972-08-16
DE2037478A1 (de) 1972-02-03
BE770180A (fr) 1971-12-01
FR2103089A5 (fr) 1972-04-07

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