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. 02, 1988
Filed:
Dec. 24, 1986
John N Troxell, Jr, Houston, TX (US);
Cameron Iron Works, Inc., Houston, TX (US);
Abstract
An improved telescoping joint suitable for use in repair of subsea pipelines including an inner tubular member, an outer tubular member for receiving the inner tubular member therein with an annulus between the members with seals establishing effective piston areas for extending the joint by causing relative extending movement between the members and relative retracting movement between the members, a pressure responsive locking piston for camming gripping elements into tight locking engagement between the members, and a pressure responsive piston and seal for providing a metal-to-metal seal between the members upstream of the extending piston area, the retracting piston area and the lock. Additionally a testing port is provide to establish the fluid tightness of the seal in the subsea location prior to the installation of the joint into the pipeline as a replacement for a damages section which has been removed. Both the lock and seal are releasable by reversing the application of fluid pressure to their pistons or piston areas.