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. 13, 1987
Filed:
Dec. 10, 1984
Applicant:
Inventor:
Thomas C Burroughs, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166278 ; 166 51 ;
Abstract
Method and apparatus for gravel packing a perforate liner (12) in a well including a wash pipe (34) carried by a cross-over tool (30) which has a pair of fluid passages (38-40) through which the flow of fluid may be reversed. The wash pipe (34) is mounted in a floating relation within the liner (12) for vertical relative movement and a double acting piston (62) mounted between the liner (12) and wash pipe (34) is responsive to fluid pressure within the liner (12) for moving the wash pipe (34) vertically relative to the liner (12).