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:
Dec. 28, 1982
Filed:
Aug. 25, 1980
Applicant:
Inventors:
George I Boyadjieff, Anaheim, CA (US);
Andrew B Campbell, San Marino, CA (US);
Assignee:
Varco International, Inc., Orange, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21C / ; E21C / ;
U.S. Cl.
CPC ...
175 61 ; 175 62 ; 175 77 ; 175 78 ;
Abstract
A hole is drilled laterally from a main well bore by lowering a drilling unit into the bore in a position of extension essentially longitudinally thereof, and then swinging the unit to a position of extension transversely of the well bore to drill the lateral hole. The drilling unit is desirably held by a carrier as the drilling unit and carrier are lowered into the well, and preferably is of a self-propelling character adapted to move entirely out of the carrier and grip the wall of the lateral hole in a manner transmitting the reactive forces of the drilling operation directly to the earth formation.