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:
Nov. 07, 2000
Filed:
Aug. 05, 1998
Bruno Best, Rijswijk, NL;
Shell Oil Company, Houston, TX (US);
Abstract
An extended reach drilling (ERD) system for drilling a borehole in an underground formation is provided. The ERD system comprises a drill bit, a motor for driving the drill bit, a drill-pipe to surface, a hydraulic cylinder/piston arrangement for providing the required weight on bit, the drill-pipe being coupled to a selected one of the cylinder and the piston of the cylinder/piston arrangement such that the drill pipe may rotate relative to the selected one of the cylinder and the piston, the drill bit being coupled to the other one of the cylinder and the piston, and locking members for locking the selected one of the cylinder and the piston against the borehole wall, the locking members being operable between an engaged position and a disengaged position.