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:
Apr. 10, 2018
Filed:
Jul. 08, 2015
Applicant:
Dreco Energy Services Ulc, Edmunton, CA;
Inventor:
Vincenzo Barbato, Richmond, TX (US);
Assignee:
Dreco Energy Services ULC, Calgary, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 23/03 (2006.01);
U.S. Cl.
CPC ...
E21B 23/03 (2013.01);
Abstract
A wellbore dart or pill is provided with a lock such that upon reaching a corresponding key, dogs are extended radially outward to engage with a tool within the wellbore. Typically the dart will include a lock section having a number of pins wherein each pin must be depressed a proper amount where the amount includes not being depressed to allow a tumbler within the dart to move either rotationally or axially walking a dog in an outward condition.