Hydrocarbon vent hood
Patent 6176317 Issued on January 23, 2001. Estimated Expiration Date: 
June 2, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 2, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 324311 filed on 06/02/1999US Classes:166/379, Above ground parts52/20, With additional enclosure structure; e.g., manhole166/75.13, Well caps or casing heads166/79.1, Cap having transporting means or ground support166/85.1With assembly or disassembly means (e.g., handling, guiding, or tool feature)ExaminersPrimary: Suchfield, George A.Attorney, Agent or FirmForeign Patent References
International ClassesE21B 033/02E21B 033/03 AbstractAn improved vent hood for abandoned oil and gas wells which is made of concrete and reinforced with linear and coiled rebar to withstand substantial overburden. The invention can be fabricated in either a two-section conical or cylindrical embodiment. Either of the two-section embodiments allow the base member to be positioned around the abandoned well casing and thereafter filled with gravel. A concrete lid having an aperture is thereafter placed upon the base section with a gas sealant disposed between the mating surfaces of lid and base sections. A vent pipe is thereafter inserted into the aperture to permit gas collected within the vent hood to flow to surface.Other References
Field of SearchWell caps or casing headsSuspension means Cap having transporting means or ground support With assembly or disassembly means (e.g., handling, guiding, or tool feature) Guiding or aligning feature Above ground parts With additional enclosure structure; e.g., manhole Vault cover-closure Elevation or level adjustment Ground supporting enclosure Covers | |
