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:
Mar. 30, 2021
Filed:
May. 26, 2016
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventor:
Marcel Budde, Vlaardingen, NL;
Assignee:
Weatherford Technology Holdings, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/12 (2006.01); E21B 43/10 (2006.01); E21B 33/16 (2006.01); E21B 33/04 (2006.01); E21B 23/04 (2006.01);
U.S. Cl.
CPC ...
E21B 33/12 (2013.01); E21B 23/04 (2013.01); E21B 33/04 (2013.01); E21B 33/16 (2013.01); E21B 43/10 (2013.01);
Abstract
Methods and apparatus are provided for cementing a liner. In one embodiment, the method includes releasing a dart behind a cement; landing the dart in an activation seat; increasing pressure to activate a liner hanger; further increasing pressure to release the dart from the activation seat; landing the dart in a plug; and increasing pressure to release the dart and the plug. In one embodiment, releasing the dart from the activation seat comprises deforming the dart.