Rebecca L Caldwell

US Patent:

20100163253, Jul 1, 2010

Filed:

Dec 31, 2009

Appl. No.:

12/651210

Inventors:

Rebecca M. Caldwell - Houston TX, US
Christopher J. Cuffe - The Woodlands TX, US

International Classification:

E21B 33/12

US Classification:

166387, 166191

Abstract:

An apparatus for providing fluid communication includes a housing having a port; an inner sleeve adapted to seal the port; and a seal sleeve adapted to seal the port, wherein the seal sleeve is disposed between the inner sleeve and the housing and is movable with the inner sleeve to seal the port. In another embodiment, the port is sealed using a metal to metal seal.

US Patent:

20100243235, Sep 30, 2010

Filed:

Mar 31, 2009

Appl. No.:

12/415571

Inventors:

Rebecca Caldwell - Houston TX, US
Patrick J. Zimmerman - Houston TX, US
Robert Coon - Missouri City TX, US
Henry Joe Jordan - Willis TX, US
David Ward - Houston TX, US

Assignee:

WEATHERFORD/LAMB, INC. - Houston TX

International Classification:

E21B 33/12
E21B 33/124
E21B 23/00
E21B 33/122

US Classification:

166118, 166202, 166387

Abstract:

A packer provides multiple seals when deployed downhole. Exposed to an activating agent, a swellable element on the packer's mandrel expands radially outward to form a seal with the borehole wall. One or more deformable elements, such as compressible packers or cup packers, are disposed on the mandrel adjacent the swellable element. These deformable element deform outward to the surrounding borehole wall to at least partially isolate the downhole annulus and the swellable element. Bias units releasably affixed on the tool adjacent the deformable elements can deform the elements. These bias unit can be released either by swelling of the swellable element or by fluid pressure. Once released, the bias units are axially biased toward the deformable elements to deform them. In this way, the packer can form multiple seals with the borehole wall, and the deformable elements can isolate the swellable element from the downhole annulus, which can keep the swellable element from degrading or being overly extruded.

US Patent:

20160177660, Jun 23, 2016

Filed:

Dec 19, 2014

Appl. No.:

14/577527

Inventors:

- Houston TX, US
Rebecca Caldwell - Houston TX, US

International Classification:

E21B 33/129
E21B 23/06
E21B 33/127

Abstract:

A packer apparatus and method. The packer includes a mandrel including a gripping structure, a first sleeve received around the mandrel, and a second sleeve received around the mandrel and coupled with the first sleeve. The packer also includes a clamp ring received around the mandrel and axially between at least a portion of the first sleeve and at least a first portion of the second sleeve. The clamp ring includes a first tapered surface and at least one gripping structure configured to engage with the gripping structure of the mandrel. The first sleeve engages the first tapered surface, such that, when the first and second sleeves are moved axially together, the first sleeve applies a radially-inward directed force on the clamp ring.