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US 5,348,085 AGranted
Mechanical plug device
AssigneeCherne Industries Incorporated
InventorBryan R. Benson
Life of this patent
Estimating the term…
Abstract
A well monitor plug device for sealing a subwell casing. The plug device has an adjustable and tamper resistant sealing structure which includes a turning member and a cooperating locking member which permits access to a sampling aperture.
Claims18
A unitary well monitor plug device for sealing a subwell casing comprising:
- a) an upper plate member having a top portion and a bottom portion and an aperture therethrough, a plurality of stop members positioned on said top portion and being spaced from said aperture and a frustoconical ramp member extending from said bottom portion,
- b) a bottom plate member having a threaded aperture therethrough and having an upwardly extending frustoconical ramp member,
- c) an expandable O-ring having an outwardly extending peripheral sealing surface and an inwardly extending generally V-shaped inner surface for slidingly engaging said frustoconical ramp members of said upper and bottom plate members, and
- d) a generally T-shaped bolt member having a horizontally extending top member and a vertically extending hollow threaded cylinder for passing through said upper plate member aperture and for threadingly engaging said bottom plate member threaded aperture, said hollow threaded cylinder further having a bottom end having stop means extending outwardly therefrom, said horizontally extending top member further comprising:
- i) an axially disposed cap member mounted to said hollow threaded cylinder and having a monitor port therethrough for communication with said hollow threaded cylinder and further having removable plug means in said cap member monitor port,
- ii) first and second outwardly extending and aligned ear members mounted to said cap member,
- iii) said first ear member having an aperture therethrough being axially disposed spacially parallel to said upper plate member top portion, and
- iv) said second ear member having a latch member with a bifurcated base portion pivotably mounted thereto, said latch member having a downwardly extending bifurcated frontal portion having first and second outwardly extending members constructed and arranged to rest on said cap member and to extend adjacent and below said aperture of said first ear member when said latch member is pivoted in a downward configuration, said bifurcated base portion being constructed and arranged to straddle a stop member or to be positioned between adjacent stop members when said latch member is in a downward configuration.
5 more elements
A well monitor plug device to secure a well casing and to provide sampling access into the well casing, comprising:
- a) an adjustable unitary sealing means having an upper plate structure,
- b) a sampling aperture in said upper plate structure and having removable plug means in said sampling aperture of said upper plate structure,
- c) a turning member extending axially and upwardly from said upper plate structure and being constructed and arranged to adjust said sealing means and to cover said sampling aperture,
- d) a locking member connected to said turning member and being constructed and arranged to pivot into an upward position to provide access to said sampling aperture and to permit rotation of said turning member, said locking member further having means to receive and clasp of a lock when in a downward position, said locking member further having a bifurcated downwardly sloping forward structure and an aligned bifurcated bottom structure of a specified width, said bifurcated bottom structure further having opposing downwardly extending portions being spaced a predetermined distance, and
- e) a plurality of equidistantly spaced stop members each having a specified width extending from said upper plate structure and being adapted to prevent rotation of said turning member when said locking member is in a downward position, said specified width of said bifurcated bottom structure of said locking member being less than the equidistantly spaced stop members spacing distance and said predetermined distance between said downwardly extending portions of said bifurcated bottom structure being greater than said stop member specified width, whereby said locking member may be positioned to straddle a stop member or placed between adjacent stop members.
2 more elements
Dependencies are inferred from the claim text.