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. 20, 1981
Filed:
Aug. 20, 1979
Gary M Crase, Cypress, CA (US);
Kurt M Trzeciak, Irvine, CA (US);
Smith International, Inc., Newport Beach, CA (US);
Abstract
An in-hole motor drill assembly has the rotor of the motor connected to the drill bit and a housing connected to the running string, and normally disengaged torque transmitting members between said housing and said drill bit provide for engaging said bit and running string for mutual rotation, by pulling on the running string. The torque transmitting members are locked in engagement, enabling the tension on the drill pipe string to be relieved, and the bit can be rotated by rotation of the drill pipe string in either direction. The usual pick-up bearing between the housing and the shaft provides an abutment for a releasable thrust transmitting member which normally holds the clutch disengaged.