Patrick James Zimmerman
Engineering at Brookvilla Dr, Houston, TX

5924491, Jul 20, 1999

Jul 3, 1997

8/888149

Henry Joe Jordan - Conroe TX
Patrick J. Zimmerman - Houston TX

Baker Hughes Incorporated - Houston TX

E21B 2302

166386

A configuration is provided to anchor the tubing string into a polished-bore receptacle while providing the ability to disconnect the tubing string from the polished-bore receptacle in a single trip in the wellbore. The configuration of the anchor provides for metal-to-metal sealing, and the disconnection is accomplished by a penetrating tool which accesses an annular cavity to unsupport locking dogs which facilitate removal of the tubing string from the polished-bore receptacle with applied pressure. If the packer needs to come out for any reason, a retrieving tool is described which, in a single trip, allows the retrieving tool to be advanced thru-tubing into the packer itself to unlock it. The retrieving tool is pulled out of the tubing and a pick-up force is applied to the tubing string to extend the packer to allow for its ultimate removal with the tubing.

6581681, Jun 24, 2003

Jun 21, 2000

09/598049

Patrick J. Zimmerman - Houston TX
Danny W. Wagoner - Cypress TX
Tyson Stafford - Cypress TX
David Speller - Houston TX

Weatherford/Lamb, Inc. - Houston TX

E21B 3312

166135, 166138, 166192

A bridge plug for use in a wellbore to isolate an upper portion of the wellbore from a lower portion. The bridge plug is run into the wellbore on wireline or run-in tubular and then set in the wellbore at a predetermined depth. In one aspect of the invention, the bridge plug includes a cylindrical body having a longitudinal bore therethrough which is sealed to the passage of fluid. A first and second lock ring assemblies are installed on the outer surface of the body and are designed to move in a single direction with respect to the body. A bidirectional slip member which provides resistance to axial forces in two directions and a sealing member is located on the exterior of the body. A sealing member is disposed between the first and second lock ring assemblies and is actuated by movement of the first ring towards the second ring.

2003018, Oct 9, 2003

Apr 4, 2002

10/116772

Patrick Zimmerman - Houston TX, US
Rocky Turley - Houston TX, US
William Eldridge - Cypress TX, US
Michael Ritter - Conroe TX, US
Gary Ingram - Richmond TX, US
Thomas Nguyen - Houston TX, US

Weatherford/Lamb, Inc.

E21B023/06

166/181000, 166/123000

A releasing mechanism for releasing a hydraulically actuated setting tool from a downhole tool is provided. Preferably, the downhole tool to be released is a wellbore sealing tool such as a bridge plug, packer or inflatable packer. The releasing mechanism comprises an adapter having a body, a connector above the body connected to the setting tool, and a lower portion. The releasing mechanism further comprises a releasable connection which releasably connects the lower portion of the adapter to a mandrel within the bridge plug or other sealing tool. In one embodiment, the releasable connection defines a frangible body disposed within the plane of the circumferential bore of the bridge plug mandrel. In another arrangement, the releasable connection defines both a frangible body and threaded collet fingers which releasably engage matching threads on the outer surface of the mandrel of the bridge plug or other wellbore sealing tool.

2012010, May 3, 2012

Jan 6, 2012

13/345500

Ronald van Petegem - Montgomery TX, US
John P. Broussard - Kingwood TX, US
Christopher Hall - Cypress TX, US
Patrick J. Zimmerman - Houston TX, US

WEATHERFORD/LAMB, INC. - Houston TX

E21B 43/04

166278, 166 51

A gravel pack operation disposes slurry from an inner string into the annulus around a shoe track. A valve on the shoe track can open and close flow through a port, and seats around the port allow an outlet of the tool to seal with the port. When the valve is open and the outlet sealed with the port, the slurry in the string is pumped into the borehole around the shoe track by flowing the slurry from the outlet into the borehole through the flow port. As this occurs, gravel collects around the shoe track, and fluid returns in the borehole flow back into the shoe track through a screen disposed toward the track's toe. Once inside the shoe track, the fluid returns communicate through a bypass on the shoe track around the sealed outlet and port. At this point, the fluid returns can pass uphole in the gravel pack assembly.

2010028, Nov 18, 2010

Jul 27, 2010

12/844540

Rocky A. Turley - Houston TX, US
Craig Fishbeck - Houston TX, US
Rami Al Oudat - Huntsville TX, US
Patrick J. Zimmerman - Houston TX, US
Charles D. Parker - Sugar Land TX, US
Michael R. Niklasch - Big Spring TX, US
William J. Eldridge - Cypress TX, US
Roland Freihet - Edmonton, CA
Bill Murray - Alberdeen, GB

Weatherford/Lamb, Inc. - Houston TX

E21B 33/12

166387

A non-metallic element system is provided as part of a downhole tool that can effectively seal or pack-off an annulus under elevated temperatures. The element system can also resist high differential pressures without sacrificing performance or suffering mechanical degradation, and is considerably faster to drill-up than a conventional element system. In one aspect, the composite material comprises an epoxy blend reinforced with glass fibers stacked layer upon layer at about 30 to about 70 degrees. In another aspect, a mandrel is formed of a non-metallic polymeric composite material. A downhole tool, such as a bridge plug, frac-plug, or packer, is also provided. The tool comprises a support ring having one or more wedges, an expansion ring, and a sealing member positioned with the expansion ring.

2012010, May 3, 2012

Jan 6, 2012

13/345476

John P. Broussard - Kingwood TX, US
Ronald van Petegem - Montgomery TX, US
Christopher Hall - Cypress TX, US
Patrick J. Zimmerman - Houston TX, US
Brian Ritchey - Hockley TX, US
Rockni Van Clief - Houston TX, US

WEATHERFORD/LAMB, INC. - Houston TX

E21B 23/00, E21B 19/00

166382, 166 851

A downhole assembly, such as a toe-to-heel gravel pack assembly, has a body with a body passage, outlet ports for slurry, and screens for fluid returns. An inner string deploys in the body to perform the toe-to-heel gravel packing. A telescoping adjustment device allows the inner string to space out properly when deployed to the toe of the assembly. Sealing surfaces or seats of a locating device in the body separate a sealable space and seal against seals on the inner string movably disposed therein. Fluid pumped in the string produces a pressure buildup when the string's port communicates with the sealable space. The pressure buildup indicates that the tool is positioned at a first location in the assembly, and other positions for placement of the tool can then be calculated therefrom.

2010029, Nov 25, 2010

Jul 27, 2010

12/844481

Rocky A. Turley - Houston TX, US
Craig Fishbeck - Houston TX, US
Rami Al Oudat - Huntsville TX, US
Patrick J. Zimmerman - Houston TX, US
Charles D. Parker - Sugar Land TX, US
Michael R. Niklasch - Big Spring TX, US
William J. Eldridge - Cypress TX, US
Roland Freihet - Edmonton, CA
Bill Murray - Alberdeen, GB

Weatherford/Lamb, Inc. - Houston TX

E21B 33/12

166138

A non-metallic element system is provided as part of a downhole tool that can effectively seal or pack-off an annulus under elevated temperatures. The element system can also resist high differential pressures without sacrificing performance or suffering mechanical degradation, and is considerably faster to drill-up than a conventional element system. In one aspect, the composite material comprises an epoxy blend reinforced with glass fibers stacked layer upon layer at about 30 to about 70 degrees. In another aspect, a mandrel is formed of a non-metallic polymeric composite material. A downhole tool, such as a bridge plug, frac-plug, or packer, is also provided. The tool comprises a support ring having one or more wedges, an expansion ring, and a sealing member positioned with the expansion ring.

7779927, Aug 24, 2010

Dec 23, 2009

12/646055

Rocky A. Turley - Houston TX, US
Craig Fishbeck - Houston TX, US
Rami Al Oudat - Huntsville TX, US
Patrick J. Zimmerman - Houston TX, US
Charles D. Parker - Sugar Land TX, US
Michael R. Niklasch - Big Spring TX, US
William J. Eldridge - Cypress TX, US
Bill Murray - Alberdeen, GB

Weatherford/Lamb, Inc. - Houston TX

E21B 33/129

166387, 166118, 166134, 166138, 166179, 166196

A non-metallic element system is provided as part of a downhole tool that can effectively seal or pack-off an annulus under elevated temperatures. The element system can also resist high differential pressures without sacrificing performance or suffering mechanical degradation, and is considerably faster to drill-up than a conventional element system. In one aspect, the composite material comprises an epoxy blend reinforced with glass fibers stacked layer upon layer at about 30 to about 70 degrees. In another aspect, a mandrel is formed of a non-metallic polymeric composite material. A downhole tool, such as a bridge plug, frac-plug, or packer, is also provided. The tool comprises a support ring having one or more wedges, an expansion ring, and a sealing member positioned with the expansion ring.

2004003, Feb 26, 2004

Apr 30, 2003

10/426938

Michael Ritter - Conroe TX, US
James Rochen - Waller TX, US
Patrick Zimmerman - Houston TX, US
Donald Greenlee - Murchison TX, US

E21B033/03

277/328000

The present invention generally relates to an apparatus and a method for sealing a wellbore. In one aspect, a sealing apparatus for use in a wellbore is provided. The apparatus includes a compressible sealing member disposed around a body and an anchoring device. The apparatus further includes an anti-extrusion assembly having at least one flexible segment and one seal ring disposable a each end of the compressible sealing member, wherein the anti-extrusion assembly is constructed and arranged to form a barrier around the ends of the compressible sealing member upon expansion thereof. In another aspect, a downhole tool for sealing an annulus of a wellbore is provided. In yet another aspect, a method for sealing a wellbore is provided.

8069918, Dec 6, 2011

Mar 24, 2009

12/409661

Patrick J. Zimmerman - Houston TX, US
David Ward - Houston TX, US
Jonathan Young - Houston TX, US

Weatherford/Lamb, Inc. - Houston TX

E21B 23/01

166217, 166216, 166382

A downhole tool, such as a packer or liner hanger, has a mandrel on which slips are disposed for engaging a surrounding tubular downhole. When the tool is being run in or out of the hole, at least one magnetic component magnetically retains the slip adjacent the mandrel so the slip can be held away from the surrounding tubular. When the tool is set downhole, the initial magnetic retention can be broken, and the slips can be moved away from the mandrel to engage the surface of the surrounding tubular.