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. 11, 2018
Filed:
May. 16, 2016
Weatherford Technology Holdings, Llc, Houston, TX (US);
Michael Dedman, Powell, WY (US);
Cornelis C. Valkenburg, Powell, WY (US);
Weatherford Technology Holdings, LLC, Houston, TX (US);
Abstract
Wellbore isolation is used for a tubing string in a well. A first plug is held by a first temporary retention in a bore of a housing disposed on the tubing string and is sealed in the bore with a first seal. A second plug is also held in the bore by a second temporary retention and is sealed in the bore with a second seal. The first and second seals seal a space in the bore between the plugs. Both plugs can be of a dissolvable material. An uphole end of the first plug facing away from the space can have a non-dissolvable coating, while a downhole end of the second plug facing away from the space can have a non-dissolvable coating. The first plug releases in the bore when an uphole pressure is applied in the tubing string, and the second plug then releases after the first plug.