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:
Aug. 01, 1989
Filed:
Dec. 04, 1987
Applicant:
Inventors:
Neil H Akkerman, Houston, TX (US);
Daniel O Dewey, Houston, TX (US);
Assignee:
AVA International Corporation, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166 664 ; 166 651 ; 166 665 ; 166 72 ; 439 11 ; 336D / ;
Abstract
There is disclosed a well installation having an electrically responsive device a substantial distance beneath the wellhead and apparatus for supplying electrical current to the device from a source of alternating or time varying current outside the wellhead, which apparatus includes an electrical connector comprising a first coil on the outer side and a second coil on the inner side of a non-magnetic portion of a pressure containing wall of the well, whereby the supply of varying current from the source to the first coil forms an inductive coupling between it and the second coil of the connector.