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:
Mar. 10, 1981
Filed:
Sep. 24, 1979
Fred E Watkins, Houston, TX (US);
Camco, Incorporated, Houston, TX (US);
Abstract
In a well lock and a locking nipple for use in a tubing in a well in which the locking nipple includes first and second recesses and a stop shoulder and the well lock includes a locking housing carrying first and second locking dogs, seal means on the exterior of the housing for sealing with the nipple, a resiliently outwardly urged locator having a shoulder for engaging the stop shoulder, a mandrel telescopically positioned in the housing, a locking shoulder on the mandrel locking the first locking dogs in the first recess and means on the mandrel engaging the second locking means for preventing unlocking of the first locking dogs if pressure is applied to the seal to move the housing upwardly, the improvement in which the distance between the bottom of the first recess and the locking shoulder is greater than the distance between the bottom of the first locking dogs and the locator shoulder whereby the first locking dogs lock the device against upwardly and downwardly forces and the locator is retracted out of contact with the stop shoulder.