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. 12, 1988
Filed:
Jan. 05, 1987
Charles R Tompkins, Midland, TX (US);
Michael Pitts, Midland, TX (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
Apparatus for isolating a formation, isolating a damaged section of casing, and for pressure testing the apparatus when located in a cased well bore. The apparatus includes a first packer that is in sealing engagement with the casing for isolating the formation, second and third packers that are spaced to span the damage to the casing, a first valve for closing the passageway through the packers, and a second valve for applying pressure between the first and second packers to test the seals formed thereby. Also provided is an improved method for isolating a damaged section of casing, isolating a formation, and pressure testing the apparatus when located in a cased well bore. The method includes extending the aforementioned apparatus into the well bore, closing the first valve to close the flow through the packers, opening a second valve, and applying pressure to test the seals of the first and second packers. The method also includes the step of applying pressure down an annulus formed between a conduit upon which the apparatus is suspended and the casing to test the seal of the upper packer.