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. 20, 1988
Filed:
Feb. 11, 1986
Applicant:
Inventor:
Bjarne E Skeie, Kristiansand, NO;
Assignee:
Maritime Hydraulics A.S., Kristiansand, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175 85 ; 173164 ;
Abstract
A well drilling apparatus of the type suspended from a travelling block in a derrick for movement upwardly and downwardly with a drill string. The apparatus includes an upper nonrotatable unit comprising a drive meter for rotation of a hollow drive shaft connectable to the drill string. The apparatus further includes a lower unit or pipe handler apparatus, the lower unit being rotatable relative to the upper unit, preferably by a motor. The apparatus also includes a swivel transferring compressed air and/or hydraulic fluid from the upper non-rotatable unit to the lower rotatable unit.