Patents by Inventor Iain M. Greenan

Iain M. Greenan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Grooved swellable packer
    Patent number: 9976380
    Abstract: A swellable packer which includes a generally tubular mandrel having a central axis and an exterior cylindrical surface. The swellable packer further includes a swellable elastomeric body fixed to the exterior cylindrical surface of the mandrel, wherein the swellable elastomeric body includes a plurality of grooves and wherein the generally tubular elastomeric sleeve has a circumference and a thickness.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: May 22, 2018
    Assignee: TAM INTERNATIONAL, INC.
    Inventors: Tim Davis, Andrew Kutac, Iain M. Greenan, Ray Frisby
  • Sliding sleeve having deformable ball seat
    Patent number: 9488035
    Abstract: A sliding sleeve opens with a deployed ball. The sleeve has a seat disposed in the housing, and the seat has segments biased outward from one another with a C-ring or other biasing element. Initially, the seat has an expanded state in the sliding sleeve so that the seats segments expand outward against the housing's bore. When an appropriately sized ball is deployed downhole, the ball engages the expanded seat. Fluid pressure applied against the seated ball moves the seat into the inner sleeve's bore. As this occurs, the seat contracts, which increases the engagement area of the seat with the ball. Eventually, the seat reaches the shoulder in the inner sleeve so that pressure applied against the seated ball now moves the inner sleeve in the housing to open the sliding sleeve's flow port.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: November 8, 2016
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Scott Crowley, David Ward, Cesar G. Garcia, Iain M. Greenan
  • GROOVED SWELLABLE PACKER
    Publication number: 20150021044
    Abstract: A swellable packer which includes a generally tubular mandrel having a central axis and an exterior cylindrical surface. The swellable packer further includes a swellable elastomeric body fixed to the exterior cylindrical surface of the mandrel, wherein the swellable elastomeric body includes a plurality of grooves and wherein the generally tubular elastomeric sleeve has a circumference and a thickness.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 22, 2015
    Inventors: Tim DAVIS, Andrew KUTAC, Iain M. GREENAN, Ray FRISBY
  • Sliding Sleeve Having Deformable Ball Seat
    Publication number: 20140166292
    Abstract: A sliding sleeve opens with a deployed ball. The sleeve has a seat disposed in the housing, and the seat has segments biased outward from one another with a C-ring or other biasing element. Initially, the seat has an expanded state in the sliding sleeve so that the seats segments expand outward against the housing's bore. When an appropriately sized ball is deployed downhole, the ball engages the expanded seat. Fluid pressure applied against the seated ball moves the seat into the inner sleeve's bore. As this occurs, the seat contracts, which increases the engagement area of the seat with the ball. Eventually, the seat reaches the shoulder in the inner sleeve so that pressure applied against the seated ball now moves the inner sleeve in the housing to open the sliding sleeve's flow port.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 19, 2014
    Applicant: Weatherford/Lamb, Inc.
    Inventors: Scott Crowley, David Ward, Cesar G. Garcia, Iain M. Greenan