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:
May. 29, 1990
Filed:
Jul. 17, 1989
Imre I Gazda, Fort Worth, TX (US);
Dannie R Collins, The Colony, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
A plugging device for installation as by wireline tools in a receptacle in a wall flow conductor for plugging the flow conductor against flow from below as well as from above, the plugging device including a tubular housing having seals for sealing with the receptacle, lock members for anchoring it therein, a mandrel reciprocable in the housing between lower and upper positions for moving the lock members to locking position and for allowing them to move to unlocking position, a plug member closing the housing and being movable relative thereto between lower and upper positions, and a locking mechanism for locking the plug member to the mandrel whenever the mandrel is in its lower position and the plug member is moved to its upper position to prevent the mandrel from being moved to its unlocking position. A running tool is provided for installing the plugging device which will not release the device unless it is properly installed in the receptacle.