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:
Jan. 29, 1985
Filed:
May. 20, 1982
Alan Meadows, Burton-on-Trent, GB;
Coal Industry (Patents) Limited, London, GB;
Abstract
A drill pipe section enables electrical information signals to be transmitted along a borehole to feed information generated by instruments situated adjacent to the drilling bit along the drill string to monitoring and/indication equipment situated adjacent to the drilling machine. The section comprises a generally cylindrical housing member and a liner member fixedly mounted inside the housing member with an air gap defined between the two members. An electrically conductive element extends between two electrically conductive, annular coupling components one of which defines a radially inwardly directed coupling margin and the other of which defines a radially outwardly directed coupling margin.