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:
Oct. 03, 1989
Filed:
Sep. 15, 1988
Tommy M Warren, Coweta, OK (US);
Warren J Winters, Tulsa, OK (US);
Amoco Corporation, Chicago, IL (US);
Abstract
An excavating system, such as for drilling an oil or gas well, includes a source of high pressure fluid and a drillstring through which the fluid is conducted to an excavating apparatus connected to the bottom of the drillstring. The excavating apparatus includes a drill bit having mechanical cutting elements for mechanically boring into an earthen formation. The excavating apparatus also includes a nozzle rotatably mounted to the body of the drill bit so that the nozzle is rotatable about an axis of rotation different from the axis of rotation of the drill bit. As the drill bit is rotated about its axis of rotation, high pressure fluid is ejected from the nozzle to rotate the nozzle about its axis of rotation while the nozzle orbits the axis of rotation of the drill bit. This combined rotary and orbital motion combined with the positioning of the one or more ports of the nozzle produce a high pressure jet spray scouring substantially all the cross-sectional area engaged by the mechanical cutting elements of the drill bit as the drill bit rotates.