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:
Jan. 06, 1987
Filed:
Jul. 19, 1985
Gary D Zunkel, Chickasha, OK (US);
Michael L Bolin, Knoxville, TN (US);
Halliburton Company, Duncan, OK (US);
Abstract
The present invention relates to a weight-set single-zone gravel packer which may be left in place after gravel packing attached to the screen as a production packer. The gravel packer includes a compression-set packer element, ratchet means to releasably lock the gravel packer in a set mode, intake passage to receive fluid from a tubing string, a return passage to receive fluid from the interior of a gravel screen below the gravel packer; closeable crossover means to transmit fluid from the return passage to the wellbore annulus above the gravel packer; first check valve means to prevent flow down to the gravel screen through the return passage; and second check valve means adapted to selectively connect the return passage with the outside of the gravel packer; and J-slot means for selectively disconnecting the crossover means and tubing string from the gravel packer.