The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 1983
Filed:
Nov. 28, 1980
Thomas B Dellinger, Duncanville, TX (US);
Mobil Oil Corporation, New York, NY (US);
Abstract
A method of pushing pipe (e.g., casing) into a highly deviated borehole. The lower end of the pipe is plugged and the lower portion of the pipe string is filled with fluids (e.g., compressed gases, petroleum products, water, etc.) which have a lower density than that of the borehole fluid. This creates a buoyancy effect for the pipe in the deviated portion of the borehole which aids in keeping the pipe from contacting the lower side of the deviated hole. The pipe can be plugged or capped above the lightened section and filled with heavier fluid to aid in forcing the pipe downward into position. The plugs and caps are then removed, e.g., drilled out, when the pipe is ready for use. The fluids are thereby released into the mud slurry.