US3692041A - Variable flow distributor - Google Patents

Variable flow distributor Download PDF

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Publication number
US3692041A
US3692041A US103600A US3692041DA US3692041A US 3692041 A US3692041 A US 3692041A US 103600 A US103600 A US 103600A US 3692041D A US3692041D A US 3692041DA US 3692041 A US3692041 A US 3692041A
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US
United States
Prior art keywords
spool
sleeve
orifice
metering
fuel
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
US103600A
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English (en)
Inventor
Pasquale Columbo Bondi
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3692041A publication Critical patent/US3692041A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4358—Liquid supplied at valve interface
    • Y10T137/4372—Line pressure feed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86863—Rotary valve unit
    • Y10T137/86871—Plug

Definitions

  • ABSTRACT A variable flow distributor for disbursing contaminated fluids through a plurality of metering orifices, wherein the metering area of each orifice is uniformly regulated by offsetting the coaxial alignment of a pair of holes through adjacent movable partitions, such that seizure of the moving partitions from contaminants entering the area therebetween is prevented by the introduction of highly filtered fluid from conduit means which surround each orifice.
  • the equal distribution of fuel to jet engine burners may be accomplished by flowing fuel through a chamber such that the output flow is diverted through a series of metering orifices all of which may be adjusted simultaneously, allowing the same uniform rate of flow through each orifice.
  • a simple yet highly effective metering orifice may be formed by two opposing walls, wherein each wall contains a hole of predetermined size and one partition is adapted to slide over the surface of the opposing partition such that the two holes cooperate to form a metering orifice.
  • the metering orifice may be fully opened by sliding one of the walls into the position required for coaxial alignment of the holes, or alternatively the metering orifice maybe closed by fully offsetting the holes from each other with all ranges of orifice opening existing therebetween.
  • variable flow distributor having the capability of channeling contaminated fuel through a plurality of metered orifices without sticking or seizure of the moving members.
  • variable flow distributor is provided in accordance with this invention for uniformly disbursing fluids such as jet engine fuel that may have contaminating matter therein.
  • the variable flow distributor of this invention includes a plurality of meteringorifices formed by a first wall member having a plurality of holes therethrough, through which the flow of contaminated fuel is directed.
  • a second wall member overlies the first wall member and includes a plurality of holes for alignment with the holes of the first wall member such that the holes of the first wall member cooperate with the holes of the second wall member to form a plurality of metering orifices.
  • Actuating means are provided for offsetting the coaxialalignment of the holes of the first and second wall members, thereby further restricting the flow of contaminated fuel through each metering orifice.
  • Highly filtered wash fuel is provided for keeping the area between the wall. members free of contaminants, thereby preventing binding or seizing.
  • a bypass located upstream of the flow distributor filters a portion of the contaminated fuel and conducts it to the opposing surfaces of the wall members. Grooves contained in either opposing wall surface or in both surfaces direct a uniform flow of filtered fuel around each metering orifice, such thatthere. is a substantially uniform flow of filtered fuel from the grooves towards the central axis of each metering orifice and across the entire circumferential edge of each hole which cooperates to form a metering orifice, thereby eliminating any possibility of contaminants lodging between the moving members.
  • the first wall member could comprise a hollow spool with a plurality of radially and longitudinally spaced apart holes therethrough, with the fiow of unfiltered fuel directed into the hollow center and out through the holes in the side thereof.
  • the second wall member would be a hollow sleeve closely fitted around the outer diameter of the spool and having a plurality of radially and longitudinally spaced apart holes therethrough for alignment with the holes of the spool.
  • the variable flow distributor may be actuated by either rotating the spool about its longitudinal axis or sliding the spool along its longitudinal axis, thereby offsetting the coaxial alignment of the holes forming the metering orifices and restricting flow therethrough.
  • FIG. 1 shows a cross-sectional view of the preferred variable flow distributor of this invention.
  • FIG. 2 shows a side view of the spool of FIG. 1 with its reticulated surface contour.
  • FIG. 1 shows a cross-sectional view of a typical embodiment of a flow distributor as may be incorporated in the fuel system of a gas turbine aircraft engine.
  • Aircraft gas turbines are designed to burn various hydrocarbons ranging in grade from kerosene to high octane gasolines, and these fuels may be contaminated by gritilike impurities, such as rust and dirt.
  • Contaminated fuel enters the hollow cylindrical housing of the variable flow distributor through the inlet port 11.
  • a fine filter 12 is mounted in the inlet port and there is a chamber 14 surrounding the filter. A portion of the fuel from the inlet port passes through the filter and chamber 14 through passageway 16 into cylindrical chamber 18.
  • Spool 24 may be mechanically rotated about its axis through rod 28 which is pinned at 30 to the spool 24 to actuate the same.
  • the actuating means for the rod 28 are not shown, but in a typical gas turbine engine may include a manually operated linkage interconnected with various types of low force automatic actuators for temperature, pressure and speed connections.
  • I-Iollow cylindrical sleeve 32 includes radially and axially spaced apart output holes 34 through the side thereof.
  • the output holes 26 through the spool 24 cooperate with the opposing output holes through sleeve 32 to form metering orifices.
  • the flow of contaminated fuel through the metering orifices is controlled by actuating means which arcuately rotate rod 28.
  • the output holes 26 of the spool are radially and axially aligned with the output holes 34 of the sleeve.
  • Arcuately rotating rod 28 causes spool 24 to rotate about its central axis offsetting the radial alignment of the output holes 26 of the spool with the output holes 34 of the sleeve, thereby simultaneously restricting the flow of contaminated fuel through each metering orifice.
  • the distributed output fuel is discharged through output ports 36 in housing 10.
  • FIG. 2 illustrates the contour of the outside surface of spool 24, and further shows one configuration for the arrangement of an 8 hole spool for uniformly distributing fuel to 8 burners.
  • the spool alternatively could contain any number of holes depending on the number of burners serviced by the flow distributor.
  • Annular groove 40 uniformly distributes the filtered wash fuel to the longitudinal grooves 42 which are further intersected by additional annular grooves 44.
  • the longitudinal and annular grooves surround each hole 26 on the surface of spool 24 so as to define a reticulated surface contour thereby insuring a uniform flow'of filtered wash fuel around each hole. Holes 26 on the spool. cooperating with holes 34 on the sleeve to form the metering orifices, effect reductions in the pressure of fuel flowing therethrough.
  • the reduced pressure at the metering orifices causes filtered wash fuel to uniformly flow from the surrounding annular and longitudinal grooves toward the metering orifices and back into the unfiltered flow of fuel.
  • the filtered wash fuel flows between the close fitting surfaces of the spool and sleeve maintaining the flow pattern as illustrated by the arrows of FIG. 2, thereby keeping the surfaces washed or bathed free of any grit-like impurities that may be present in the main flow path through the metering orifices.
  • the filtered wash fuel prevents wear and possible seizure of the spool 24 and sleeve 32.
  • annular and longitudinal grooves around each metering orifice effect a substantial improvement over prior art systems by insuring a uniform flow of filtered wash fuel over the circumferential edges of all the holes that define the metering orifices. If the flow of filtered wash fuel over the entire circumferential edge of each hole was not uniform, grit or impurities from the contaminated fuel could lodge between the closely fitted surfaces at those areas along the circumferential edges where filtered wash flow is reduced or lacking, thereby causing sticking or seizure.
  • the annular and longitudinal grooves around each orifice also isolate the orifices from each other eliminating any possible contamination paths between the orifices. The grooves further insure that the filtered wash fuel is uniformly distributed to each metering orifice, no matter how far the metering orifice may be from the inlet passage 16.
  • FIG. 3 shows a cross-sectional view of sleeve 32 embodying an alternate scheme for incorporating the grooves into the inside surface of sleeve 32.
  • Highly filtered wash fluid would exit form passage 16 into annular groove 46 on the inside surface of the sleeve.
  • Annular groove 46 uniformly distributes the filtered wash fuel to the longitudinal grooves 48 which are further intersected by additional annular grooves 50.
  • the longitudinal and annular grooves surround each hole 34 on the inside surface of sleeve 32 so as to define a reticulated surface contour thereby insuring a uniform flow of filtered wash fuel around each hole.
  • Sleeve 32 as shown in FIG. 3 could be used in combination with the spool of FIG. 2 wherein the longitudinal and annular grooves of the spool and sleeve would be aligned in substantially opposing relation.
  • cylindrical spool 24 could be actuated by axially sliding the spool along its central axis, which also would simultaneously offset the opposing holes and uniformly restrict flow through each metering orifice.
  • the preferred embodiment of the invention has been described fully as applied to an aircraft gas turbine fuel system because the invention was conceived in an effort to overcome failures in such systems that were experienced as a result of impurities in the fuel. It should be obvious that the invention may be applied to any type of fluid transfer system wherein minute particulate matter is present in the fluid being transferred, and wherein it is desirable to protect the variable flow distributor from the particulate matter.
  • a variable flow distributor for uniformly dispersing fluids that may have contaminated matter therein comprising a housing;
  • inlet means for conducting the field into the housing
  • a hollow sleeve disposed within the housing and having a plurality of radially and longitudinally spaced apart holes therethrough;
  • a hollow spool movably disposed within the hollow sleeve and having a plurality of radially and longitudinally spaced apart holes therethrough for cooperation with the holes of the sleeve to form variable metering orifices such that fluid may be directed into the hollow center of the spool and out through the metering orifices;
  • bypass means upstream of the housing for filtering a portion of the fiuid and channeling the filtered fluid to'between the opposing surfaces of the sleeve and spool;
  • conduit means as defined by the contour of the opposing surfaces of the sleeve and spool for receiving the filtered fluid and directing a uniform and continuous flow of filtered fluid entirely around each orifice independent of the metered orifice opening such that there is a substantially uniform and continuous flow of filtered fluid from the conduit means towards the central axis of each metering orifice and across the entire circumferential edge of each hole which cooperates to form a metering orifice for all variable metered orifices between full open and closed;
  • outlet means for conducting the fluid from each metering orifice.
  • variable flow distributor of claim 1 wherein the conduit means includes a series of intersecting grooves in the opposing surface of the sleeve, with the grooves so arranged as to completely surround each hole of the sleeve thereby forming a reticulated surface contour.
  • variable flow distributor of claim I wherein the conduit means includes a series of intersecting grooves in the opposing surface of the spool, with the grooves so arranged as to completely surround each hole of the spool thereby forming a reticulated surface contour.
  • variable flow distributor of claim 1 including actuator means having a rod for rotating the spool about its axis.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Sliding Valves (AREA)
US103600A 1971-01-04 1971-01-04 Variable flow distributor Expired - Lifetime US3692041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10360071A 1971-01-04 1971-01-04

Publications (1)

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US3692041A true US3692041A (en) 1972-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US103600A Expired - Lifetime US3692041A (en) 1971-01-04 1971-01-04 Variable flow distributor

Country Status (6)

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US (1) US3692041A (enExample)
JP (1) JPS5425249B1 (enExample)
CA (1) CA938859A (enExample)
DE (1) DE2148259A1 (enExample)
FR (1) FR2120660A5 (enExample)
GB (1) GB1351652A (enExample)

Cited By (59)

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US3819296A (en) * 1972-03-06 1974-06-25 Mitsubishi Heavy Ind Ltd Control for hydraulic machine having adjustable blades
US3833018A (en) * 1973-02-21 1974-09-03 Pass Port Syst Corp Low leakage vacuum valve and chamber using same
US4298026A (en) * 1979-12-17 1981-11-03 Instrumentation Laboratory Inc. Spool valve
DE3408815A1 (de) * 1984-03-10 1985-09-26 Mesroc GmbH, 8500 Nürnberg Mehrwege-armatur zum umlenken von stroemungsrichtungen und/oder regeln von foerdermengen von in rohrleitungssystemen gefuehrten gasfoermigen oder fluessigen medien, insbesondere bei roehrenwaermeaustauschern
US4561469A (en) * 1983-01-31 1985-12-31 Aisin Seiki Kabushiki Kaisha Electromagnetic control valve
US5031656A (en) * 1988-04-29 1991-07-16 Chrysler Corporation Reciprocating valves in a fluid system of an automatic transmission
US5816290A (en) * 1996-03-13 1998-10-06 Fleck Controls, Inc. Rotary control valve for a water conditioning system
US5901737A (en) * 1996-06-24 1999-05-11 Yaron; Ran Rotary valve having a fluid bearing
US6185757B1 (en) 1999-06-24 2001-02-13 Saratoga Spa & Bath Co., Inc. Manual control of water delivery through ports of tub, spa or shower
US6280000B1 (en) 1998-11-20 2001-08-28 Joseph A. Zupanick Method for production of gas from a coal seam using intersecting well bores
US6412556B1 (en) 2000-08-03 2002-07-02 Cdx Gas, Inc. Cavity positioning tool and method
US6425448B1 (en) 2001-01-30 2002-07-30 Cdx Gas, L.L.P. Method and system for accessing subterranean zones from a limited surface area
US6454000B1 (en) 1999-11-19 2002-09-24 Cdx Gas, Llc Cavity well positioning system and method
US6490740B1 (en) 1999-06-24 2002-12-10 Saratoga Spa & Bath Co., Inc. Motorized control of water delivery through ports of tub, spa or shower
US6598686B1 (en) 1998-11-20 2003-07-29 Cdx Gas, Llc Method and system for enhanced access to a subterranean zone
US6662870B1 (en) 2001-01-30 2003-12-16 Cdx Gas, L.L.C. Method and system for accessing subterranean deposits from a limited surface area
US6679322B1 (en) 1998-11-20 2004-01-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6681855B2 (en) 2001-10-19 2004-01-27 Cdx Gas, L.L.C. Method and system for management of by-products from subterranean zones
US6684722B1 (en) * 2000-07-07 2004-02-03 Rob G. Parrish Aviatorial valve assembly
US20040040315A1 (en) * 2001-03-27 2004-03-04 Tomohiro Koyama High and low pressure gas selector valve of refrigerator
US6708764B2 (en) 2002-07-12 2004-03-23 Cdx Gas, L.L.C. Undulating well bore
US6725922B2 (en) 2002-07-12 2004-04-27 Cdx Gas, Llc Ramping well bores
US20040103947A1 (en) * 2001-11-28 2004-06-03 Ranco Incorporated Of Delaware Automotive coolant control valve
US6848508B2 (en) 2001-10-30 2005-02-01 Cdx Gas, Llc Slant entry well system and method
US20050109505A1 (en) * 2003-11-26 2005-05-26 Cdx Gas, Llc Method and system for extraction of resources from a subterranean well bore
US6942030B2 (en) 2002-09-12 2005-09-13 Cdx Gas, Llc Three-dimensional well system for accessing subterranean zones
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US6964308B1 (en) 2002-10-08 2005-11-15 Cdx Gas, Llc Method of drilling lateral wellbores from a slant well without utilizing a whipstock
US6988548B2 (en) 2002-10-03 2006-01-24 Cdx Gas, Llc Method and system for removing fluid from a subterranean zone using an enlarged cavity
US6991048B2 (en) 2002-07-12 2006-01-31 Cdx Gas, Llc Wellbore plug system and method
US6991047B2 (en) 2002-07-12 2006-01-31 Cdx Gas, Llc Wellbore sealing system and method
US7025154B2 (en) 1998-11-20 2006-04-11 Cdx Gas, Llc Method and system for circulating fluid in a well system
US7073595B2 (en) 2002-09-12 2006-07-11 Cdx Gas, Llc Method and system for controlling pressure in a dual well system
US7100687B2 (en) 2003-11-17 2006-09-05 Cdx Gas, Llc Multi-purpose well bores and method for accessing a subterranean zone from the surface
US7134494B2 (en) 2003-06-05 2006-11-14 Cdx Gas, Llc Method and system for recirculating fluid in a well system
WO2006135364A1 (en) * 2005-06-10 2006-12-21 Sumitomo Heavy Industries, Ltd. Multiple rotary valve for pulse tube refrigerator
US7207395B2 (en) 2004-01-30 2007-04-24 Cdx Gas, Llc Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement
US7207390B1 (en) 2004-02-05 2007-04-24 Cdx Gas, Llc Method and system for lining multilateral wells
US7222670B2 (en) 2004-02-27 2007-05-29 Cdx Gas, Llc System and method for multiple wells from a common surface location
US7264048B2 (en) 2003-04-21 2007-09-04 Cdx Gas, Llc Slot cavity
US7299864B2 (en) 2004-12-22 2007-11-27 Cdx Gas, Llc Adjustable window liner
US7353877B2 (en) 2004-12-21 2008-04-08 Cdx Gas, Llc Accessing subterranean resources by formation collapse
US7360595B2 (en) 2002-05-08 2008-04-22 Cdx Gas, Llc Method and system for underground treatment of materials
US7373984B2 (en) 2004-12-22 2008-05-20 Cdx Gas, Llc Lining well bore junctions
US7419223B2 (en) 2003-11-26 2008-09-02 Cdx Gas, Llc System and method for enhancing permeability of a subterranean zone at a horizontal well bore
US7571771B2 (en) 2005-05-31 2009-08-11 Cdx Gas, Llc Cavity well system
US8291974B2 (en) 1998-11-20 2012-10-23 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
US8333245B2 (en) 2002-09-17 2012-12-18 Vitruvian Exploration, Llc Accelerated production of gas from a subterranean zone
US8376052B2 (en) 1998-11-20 2013-02-19 Vitruvian Exploration, Llc Method and system for surface production of gas from a subterranean zone
US20160101848A1 (en) * 2014-10-09 2016-04-14 National Machine Company Nose wheel steering valve
US20170321594A1 (en) * 2016-05-03 2017-11-09 GM Global Technology Operations LLC Powertrain thermal management system and method
US9816627B2 (en) * 2011-02-15 2017-11-14 Origin Medical Devices Inc. Variable orifice rotary valves for controlling gas flow
US9816463B2 (en) * 2011-05-16 2017-11-14 Mbda France Ramjet including a detonation chamber and aircraft comprising such a ramjet
US11156300B2 (en) * 2019-10-30 2021-10-26 Robertshaw Controls Company Multi-port valve with partial circumferential seal arrangement
US11255450B2 (en) 2018-12-19 2022-02-22 Robertshaw Controls Company Multi-port multi-plane valve
US11542844B2 (en) 2019-09-20 2023-01-03 Raytheon Technologies Corporation Integrated lubricating fluid filtering and metering device
US20230139552A1 (en) * 2021-11-02 2023-05-04 Vitesco Technologies USA, LLC Coolant flow control valve
US20230175599A1 (en) * 2021-12-03 2023-06-08 Vitesco Technologies USA, LLC Multi-port coolant flow control valve assembly
US11773990B2 (en) 2020-06-05 2023-10-03 Robertshaw Controls Company Multi-port multi-mode valve

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US2928412A (en) * 1956-10-22 1960-03-15 Parker Hannifin Corp Eight port distributor valve
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Cited By (105)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819296A (en) * 1972-03-06 1974-06-25 Mitsubishi Heavy Ind Ltd Control for hydraulic machine having adjustable blades
US3833018A (en) * 1973-02-21 1974-09-03 Pass Port Syst Corp Low leakage vacuum valve and chamber using same
US4298026A (en) * 1979-12-17 1981-11-03 Instrumentation Laboratory Inc. Spool valve
US4561469A (en) * 1983-01-31 1985-12-31 Aisin Seiki Kabushiki Kaisha Electromagnetic control valve
DE3408815A1 (de) * 1984-03-10 1985-09-26 Mesroc GmbH, 8500 Nürnberg Mehrwege-armatur zum umlenken von stroemungsrichtungen und/oder regeln von foerdermengen von in rohrleitungssystemen gefuehrten gasfoermigen oder fluessigen medien, insbesondere bei roehrenwaermeaustauschern
US5031656A (en) * 1988-04-29 1991-07-16 Chrysler Corporation Reciprocating valves in a fluid system of an automatic transmission
US5816290A (en) * 1996-03-13 1998-10-06 Fleck Controls, Inc. Rotary control valve for a water conditioning system
AU703641B2 (en) * 1996-03-13 1999-03-25 Fleck Controls, Inc. Rotary control valve for a water conditioning system
US5901737A (en) * 1996-06-24 1999-05-11 Yaron; Ran Rotary valve having a fluid bearing
US8434568B2 (en) 1998-11-20 2013-05-07 Vitruvian Exploration, Llc Method and system for circulating fluid in a well system
US8505620B2 (en) 1998-11-20 2013-08-13 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
US6357523B1 (en) 1998-11-20 2002-03-19 Cdx Gas, Llc Drainage pattern with intersecting wells drilled from surface
US9551209B2 (en) 1998-11-20 2017-01-24 Effective Exploration, LLC System and method for accessing subterranean deposits
US8813840B2 (en) 1998-11-20 2014-08-26 Efective Exploration, LLC Method and system for accessing subterranean deposits from the surface and tools therefor
US6439320B2 (en) 1998-11-20 2002-08-27 Cdx Gas, Llc Wellbore pattern for uniform access to subterranean deposits
US8291974B2 (en) 1998-11-20 2012-10-23 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
US6478085B2 (en) 1998-11-20 2002-11-12 Cdx Gas, Llp System for accessing subterranean deposits from the surface
US8297350B2 (en) 1998-11-20 2012-10-30 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface
US6561288B2 (en) 1998-11-20 2003-05-13 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6575235B2 (en) 1998-11-20 2003-06-10 Cdx Gas, Llc Subterranean drainage pattern
US6598686B1 (en) 1998-11-20 2003-07-29 Cdx Gas, Llc Method and system for enhanced access to a subterranean zone
US6604580B2 (en) 1998-11-20 2003-08-12 Cdx Gas, Llc Method and system for accessing subterranean zones from a limited surface area
US6976533B2 (en) 1998-11-20 2005-12-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US8511372B2 (en) 1998-11-20 2013-08-20 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface
US6668918B2 (en) 1998-11-20 2003-12-30 Cdx Gas, L.L.C. Method and system for accessing subterranean deposit from the surface
US6679322B1 (en) 1998-11-20 2004-01-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6280000B1 (en) 1998-11-20 2001-08-28 Joseph A. Zupanick Method for production of gas from a coal seam using intersecting well bores
US8297377B2 (en) 1998-11-20 2012-10-30 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
US6688388B2 (en) 1998-11-20 2004-02-10 Cdx Gas, Llc Method for accessing subterranean deposits from the surface
US8479812B2 (en) 1998-11-20 2013-07-09 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
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Also Published As

Publication number Publication date
DE2148259A1 (de) 1972-07-27
GB1351652A (en) 1974-05-01
FR2120660A5 (enExample) 1972-08-18
CA938859A (en) 1973-12-25
JPS5425249B1 (enExample) 1979-08-27

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