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. 26, 1999
Filed:
Nov. 12, 1997
Applicant:
Inventors:
Assignee:
Baker Hughes Incorporated, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166373 ; 166386 ;
Abstract
An insert tool for pre-existing casing is disclosed which allows the use of existing control line connections to facilitate independent operation of a pair of safety valves. The insert is particularly useful when a pre-existing well is converted to gas lift operation and requires the use of downhole valves, such as tubing safety valve in combination with an annular-type safety valve. The tool can be readily reconfigured if one of the control lines becomes obstructed so that continuing independent operation of the two valve components can continue. Normal and emergency release techniques are also included when it is time to retrieve the insert assembly.