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. 25, 2018
Filed:
Dec. 22, 2015
Applicant:
Ncs Multistage Inc., Calgary, CA;
Inventors:
John Edward Ravensbergen, Calgary, CA;
Don Getzlaf, Calgary, CA;
Assignee:
NCS Multistage Inc., Calgary, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 23/00 (2006.01); E21B 34/10 (2006.01); E21B 34/12 (2006.01); E21B 34/14 (2006.01);
U.S. Cl.
CPC ...
E21B 23/006 (2013.01); E21B 34/102 (2013.01); E21B 34/12 (2013.01); E21B 34/14 (2013.01);
Abstract
There is provided a method of stimulating a formation within a wellbore that is lined with a wellbore string, the wellbore string including a port and a flow control member, wherein the flow control member is displaceable relative to the port for effecting opening and closing of the port. The port is opened by displacing the flow control member in response to an applied pressure differential across a sealing interface. The port is closed by displacing the flow control member with hydraulic hold down buttons prior to removing the sealing interface and effecting pressure equalization.