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:
Sep. 18, 2001
Filed:
Oct. 04, 2000
Robert T. Gilchrist, Jr., Westcliffe, CO (US);
Ronald M. Bass, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
Apparatus and method for electrically heating a segment of a subsea pipeline are provided. Electrical power may be supplied about midpoint between the ends of concentric pipes. The annulus between the pipes electrically isolates the pipes, but at the ends of the segment the concentric pipes are electrically connected. The pipes may be electrically connected by bulkheads or by an insulating joint. A toroidal transformer may be placed in the annulus for extracting power at a selected location along the pipeline. An insulating joint allows power to be extracted from the ends of the heated segment. Extracted power may be used for pumps, other devices or for heating jumpers or other short segments of the pipeline. Contiguous segments of a pipeline may be heated, each segment having an electrical connection to the inner and the outer pipe intermediate the ends of the segment. A riser or segment of a riser having a pipe-in-pipe configuration may also be heated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile