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:
May. 21, 2019
Filed:
Jun. 09, 2015
Dreco Energy Services Ulc, Edmonton, CA;
Vincenzo Barbato, Richmond, TX (US);
Richard Westgarth, Cypress, TX (US);
Dreco Energy Services ULC, Calgary, CA;
Abstract
A wellbore dart or pill is provided such that each time the dart passes through a downhole tool having a seat, an externally extending finger is forced radially inward into the dart. As the finger moves inward to its depressed position, the finger moves a ball or other placeholder from a first position to a second position. When the ball is moved to the second position it may be released into the interior of the well bore or into a chamber in the tool. Once each of the balls have been released from the second position the finger is locked radially outward causing the dart to land and be locked in place at the next seat that is encountered by the dart.