Side door casing spool for an oilwell casing

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Description

FIG. 1 is a perspective view taken from the top, front and left side of a side door casing spool for an oilwell casing showing our new design;

FIG. 2 is a front elevational view thereof, the rear being the same as the front shown;

FIG. 3 is a left side elevational view thereof, the right side being the same as the left side shown; and,

FIG. 4 is a top plan view thereof, the bottom being the same as the top shown.

Referenced Cited
U.S. Patent Documents
D34032 February 1901 Gates
D205916 October 1966 Pelsue
D208388 August 1967 Graham
D240428 July 1976 Hoffman
D245928 September 27, 1977 Frafjord
D254266 February 19, 1980 Tableriou
1533404 April 1925 Green
Patent History
Patent number: D287264
Type: Grant
Filed: Apr 25, 1983
Date of Patent: Dec 16, 1986
Inventors: Marion Rinaldo (Palisade, CO), William J. Crouch (Casper, WY)
Primary Examiner: James R. Largen
Attorney: Edwin L. Spangler, Jr.
Application Number: 6/488,063
Classifications
Current U.S. Class: D23/1; Drilling, Mining, Or Soil Treatment (includes Element) (D15/21); D23/40