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:
Dec. 03, 1991
Filed:
Feb. 12, 1990
Applicant:
Inventors:
L Michael McKee, Broken Arrow, OK (US);
Joseph D Scranton, Tulsa, OK (US);
Robert L Brookey, Jenks, OK (US);
Derrel Gurley, New Orleans, LA (US);
Ernie Sodich, Caldwell, TX (US);
Assignee:
Dowell Schlumberger Incorporated, Tulsa, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166278 ; 166 51 ; 166120 ; 166124 ; 166125 ; 166217 ; 166317 ;
Abstract
A gravel packer and service tool combination for use in subterranean wells operates sequentially to lock and seal the packer in the well at a producing formation, release a mechanical connection between the packer and service tool, and open a passage through which gravel packing can be performed. Each operational step can be performed in primary and secondary fluid pressure-responsive modes of operation. The secondary mode of operation can be employed in the event the primary mode of operation fails.