CA2218030A1 - Valve having pressure equalizing conduit - Google Patents

Valve having pressure equalizing conduit

Info

Publication number
CA2218030A1
CA2218030A1 CA 2218030 CA2218030A CA2218030A1 CA 2218030 A1 CA2218030 A1 CA 2218030A1 CA 2218030 CA2218030 CA 2218030 CA 2218030 A CA2218030 A CA 2218030A CA 2218030 A1 CA2218030 A1 CA 2218030A1
Authority
CA
Canada
Prior art keywords
valve
network
pressure equalizing
bore
sealing mechanism
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.)
Granted
Application number
CA 2218030
Other languages
French (fr)
Other versions
CA2218030C (en
Inventor
Walter Domytrak
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.)
D-VALVES Ltd
Original Assignee
Walter Domytrak
942648 Alberta Ltd.
D-Valves Ltd.
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 Walter Domytrak, 942648 Alberta Ltd., D-Valves Ltd. filed Critical Walter Domytrak
Priority to CA 2218030 priority Critical patent/CA2218030C/en
Publication of CA2218030A1 publication Critical patent/CA2218030A1/en
Application granted granted Critical
Publication of CA2218030C publication Critical patent/CA2218030C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/06—Devices for relieving the pressure on the sealing faces for taps or cocks
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)
  • Lift Valve (AREA)

Abstract

Pressure can build up on one side of a valve bore sealing mechanism when it is closed. This can make the mechanism difficult to open. A bore network is provided which extends through the valve housing side wall from the inlet end of the valve bore to its outlet end. The network bypasses the sealing mechanism and its sealing areas.
Needle valves, operative from outside the valve, are used to open or close the network. The network can be temporarily opened to enable pressure to equalize across the closed sealing mechanism, thereby freeing the mechanism so that it can be turned.
CA 2218030 1997-10-10 1997-10-10 Valve having pressure equalizing conduit Expired - Lifetime CA2218030C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2218030 CA2218030C (en) 1997-10-10 1997-10-10 Valve having pressure equalizing conduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2218030 CA2218030C (en) 1997-10-10 1997-10-10 Valve having pressure equalizing conduit

Publications (2)

Publication Number Publication Date
CA2218030A1 true CA2218030A1 (en) 1999-04-10
CA2218030C CA2218030C (en) 2001-04-24

Family

ID=4161614

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2218030 Expired - Lifetime CA2218030C (en) 1997-10-10 1997-10-10 Valve having pressure equalizing conduit

Country Status (1)

Country Link
CA (1) CA2218030C (en)

Also Published As

Publication number Publication date
CA2218030C (en) 2001-04-24

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20171010