Boring or penetrating the earth – Tool removable or insertable through or around driving or...
Reexamination Certificate
2005-11-08
2005-11-08
Walker, Zakiya (Department: 3672)
Boring or penetrating the earth
Tool removable or insertable through or around driving or...
C175S235000, C175S309000, C175S318000, C166S317000, C166S332400
Reexamination Certificate
active
06962215
ABSTRACT:
Equipment and methods which may be used in conjunction with an underbalanced well completion. In a described embodiment, a valve for use in a subterranean well in conjunction with a tool conveyed through the valve in a container is provided. The valve includes a passage formed longitudinally through the valve, a closure assembly which selectively permits and prevents flow through the passage, and an engagement device which engages the container as the tool is conveyed through the passage. The closure assembly permits flow through the passage when the container is conveyed into the passage, and the closure assembly prevents flow through the passage when the container is removed from the passage. Engagement between the container and the engagement device separates the tool from the container.
REFERENCES:
patent: 4606416 (1986-08-01), Knighton et al.
patent: 6142226 (2000-11-01), Vick
patent: 6152232 (2000-11-01), Webb et al.
patent: 6167974 (2001-01-01), Webb
patent: 6343658 (2002-02-01), Webb
patent: 6557637 (2003-05-01), Dore et al.
Weatherford Drilling & Intervention Services, Underbalanced Drilling: Undeniable Success, dated Mar., 2002.
Weatherford Products & Services Catalog, title page, p. 24 including “Underbalanced Downhole Tools,” and back page, dated 2002.
A Series of Three Drill Bit Illustrations Showing a Drill Bit Being Conveyed Through a Valve Interconnected in a Tubular String in a Well—on Sale More Than One Year Prior to the Filing of the Present Applicaton (undated).
Halliburtion Brochure entitled, “Quick-Trip Valve Making Underbalanced Operations Easier and Safer,” dated Apr., 2002.
Curtis Fredrick D.
Harvey Michael J.
Lewis Derrick W.
Ray Dale E.
Halliburton Energy Service,s Inc.
Smith Marlin R.
Walker Zakiya
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