Douglas J Lehr, 6871 Rockridge Dr, Spring, TX 77381

6414905, Jul 2, 2002

Nov 26, 1996

08/756147

Steve C.. Owens - Kathy TX
Brett W. Bouldin - Pearland TX
David E. Rothers - Houston TX
Douglas Julius Lehr - The Woodlands TX
Michael Wayne Holcombe - Houston TX

Baker Hughes Incorporated - Houston TX

G01V 900

367 83, 367 84, 367 85, 367133, 175 40, 175 50

A method and apparatus for communicating coded messages in a wellbore between a transmission node and a reception node is provided. The coded messages are messages are impressed upon a fluid column which extends between the transmission node and the reception node. A transmission apparatus is provided at the transmission node which is in communication with the fluid column, for altering pressure of the fluid column to generate at least a portion of the coded message. A reception apparatus is provided at the reception node. The reception apparatus includes a rigid structural component with an exterior surface which is in direct contact with fluid column and an interior surface which is not in contact with the fluid column, and a sensor assembly which detects elastic deformation of the rigid structural component. The transmission apparatus is utilized to alter pressure of the fluid column in a predetermined pattern to generate at least one coded message. The reception apparatus is utilized to detect the coded message in the fluid column through changes in elastic deformation of the rigid structural component.

7163066, Jan 16, 2007

May 7, 2004

10/841797

Douglas J. Lehr - The Woodlands TX, US

BJ Services Company - Houston TX

E21B 33/12

166386, 166106, 1663331

A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may embody a substantially non-spherical end that is adapted to mate with a complementary receiving end on the seat. The increase surface area of contact between the plunger and the seat acts to improve the seal therebetween, reduce the stresses thereon, and improve the performance of the gravity valve in general. The components of the gravity valve may be constructed of materials, which are selected based on the specific gravity of the materials in comparison with the specific gravity of the downhole fluid for a given application. A method of constructing and utilizing a gravity valve for a downhole tool.

7475736, Jan 13, 2009

Nov 9, 2006

11/595792

Douglas J. Lehr - The Woodlands TX, US
Gabriel A. Slup - Spring TX, US

BJ Services Company - Houston TX

E21B 33/129

166386, 166120, 166134

An improved cone and integral slip assembly is described for use in the anchoring assembly of a downhole tool, such as a bridge plug, frac plug, or cement retainer. The cone may include external fins that are integral to and run axially along the cone. The integral slip assembly includes at least one axial slot, which facilitates subsequent breaking up of the integral slip assembly into individual slip segments. Each slip segment may include a channel that is adapted to mate with an external fin of the cone. As the integral slip assembly traverses the cone, the channels of the slip segments ride on the fins encouraging the integral slip assembly to break apart along the slots into the slip segments. The spacing of the fins and corresponding channels in the slip segments are positioned such to ensure that the slip segments are advantageously positioned around the cone thus, locating the packing element of the plug in the center of the wellbore. The channels in the slip segments mating with the fins also provide an anti-rotation mechanism to facilitate removal of the tool.

7854268, Dec 21, 2010

Jul 19, 2007

11/879876

Douglas J. Lehr - The Woodlands TX, US
Jason C. Mailand - The Woodlands TX, US

BJ Services Company LLC - Houston TX

E21B 33/12

166386, 166135, 166192

A storm plug for temporarily isolating an offshore well in deep water includes a retrievable service packer connected to a valve housing containing a movable isolation sleeve and a standing valve. The standing valve precludes the fluid flow through a portion of the isolation sleeve. The isolation sleeve being hydraulically actuated from an open position to a closed position. In the open position, fluid may flow through flow ports in the standing valve to an annular bypass area between the valve housing and the isolation sleeve. In the closed position, the isolation sleeve prevents fluid flow through the valve housing. The valve may be hydraulically actuated as compared to conventional storm valve that are set by workstring rotation. The running tool used to run the storm plug into the well may be hydraulically disconnected from the valve housing.

2006023, Oct 19, 2006

Apr 19, 2005

11/109574

Hubert Garrison - Deer Park TX, US
Douglas Lehr - The Woodlands TX, US
Gabriel Slup - Spring TX, US

F16L 17/06

277611000

Disclosed is an anti-extrusion assembly used in conjunction with an expandable packing device. The assembly comprises two slotted metallic rings encapsulated in a non-metallic material. The slotted metallic rings prevent extrusion of the sealing mechanism of the expandable packing device as the device is set in a wellbore casing. The encapsulating non-metallic material protects the metallic rings from damage as the packing device is run into the wellbore. In an alternative embodiment, the anti-extrusion assembly comprises a crimped metallic ring flanked by non-metallic rings. As with the slotted metallic rings, the single crimped metallic ring prevents extrusion of the sealing mechanism of the expandable packing device as it is set in the wellbore casing.

2007015, Jul 5, 2007

Dec 22, 2006

11/644443

Douglas Lehr - The Woodlands TX, US
Gabriel Slup - Spring TX, US
James Van Lue - Tomball TX, US

E21B 33/129

166123000, 166181000, 166387000

A deformable release device is disclosed to be used with downhole setting tools. The deformable release device may provide a releasable detachment to any customary setting tool, such as electric line, hydraulic, hydrostatic, and mechanical setting tools, used to set a downhole packer-type device. The deformable release device allows for the automatic release of downhole setting tools at the application a predetermined force, similar to a shear pin or shear stud. However, since the deformable release device deforms rather than shears or breaks, the releasing device minimizes the debris or remnants of the device left in the wellbore.

2007029, Dec 20, 2007

Aug 20, 2007

11/894225

Hubert Garrison - Deer Park TX, US
Douglas Lehr - The Woodlands TX, US
Gabriel Slup - Spring TX, US

BJ Services Company - Houston TX

F16L 17/06

277611000

Disclosed is an anti-extrusion assembly used in conjunction with an expandable packing device. The assembly comprises two slotted metallic rings encapsulated in a non-metallic material. The slotted metallic rings prevent extrusion of the sealing mechanism of the expandable packing device as the device is set in a wellbore casing. The encapsulating non-metallic material protects the metallic rings from damage as the packing device is run into the wellbore. In an alternative embodiment, the anti-extrusion assembly comprises a crimped metallic ring flanked by non-metallic rings. As with the slotted metallic rings, the single crimped metallic ring prevents extrusion of the sealing mechanism of the expandable packing device as it is set in the wellbore casing.

2008000, Jan 10, 2008

Jul 10, 2006

11/483917

Douglas J. Lehr - The Woodlands TX, US
Mark Zimmerman - Cypress TX, US

E21B 43/114
E21B 43/26

166298, 1663081

An annular fracturing device and method for perforating and annular fracturing multiple zones of a wellbore on a single trip, the annular fracturing device being connected to coiled tubing. The annular fracturing device may include a locating device connected beneath a packing device used to hydraulically isolate a portion of the wellbore. The packing device may be releasably connected to an abrasive perforating device, such as a sand jetting sub. The sand jetting sub may be connected to the bottom of coiled tubing, which is used to run the annular fracturing device into the well bore and to supply the sand jetting sub with abrasive material to perforate the wellbore. The coiled tubing may also supply the sand jetting sub with fluid to circulate out of the sand jetting sub during the fracturing process.