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:
Jun. 02, 1987
Filed:
Jun. 18, 1986
Burchus Q Barrington, Duncan, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
A lock, particularly suitable for locking a top packer against upward movement relative to a lower packer in a well bore, includes a radially movable latch member slidably mounted in a radial cavity defined in an inner mandrel which is movable relative to an outer member to which the top packer is connected in the exemplary use. Spring biasing elements are used to retain the latch member in a disengaged position until, from within the mandrel, an actuating pressure is exerted radially outwardly on the latch member with a force greater than the biasing force of the spring biasing elements and a radially inwardly acting force exerted by a hydrostatic pressure existing externally of the outer member but communicated internally thereof. When this occurs, gripping teeth on the latch member interlock with an engagement surface on the interior of the outer member.