JOHN E WOLF, MD
Dermatology at Main St, Houston, TX

2012021, Aug 30, 2012

Feb 28, 2011

13/036564

Piro SHKURTI - The Woodlands TX, US
John C. WOLF - Houston TX, US

SMITH INTERNATIONAL, INC. - HOUSTON TX

E21B 33/12

166387, 166134, 166196

An expandable backup ring includes an outer surface, an inner surface having a plurality of protrusions projecting radially inwardly, and a plurality of segments, the segments defined by a plurality of outer surface cuts. The plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions.

2007001, Jan 25, 2007

Jun 30, 2006

11/479022

John Wolf - Houston TX, US
Howard McGill - Lufkin TX, US

E21B 37/00

166312000, 166174000

An apparatus for cleaning a wellbore casing includes an outer housing having an axial through passage between an inlet and a first outlet wherein the inlet and the first outlet are adapted for connection in a work string, the outer housing having a second outlet extending in a direction generally transversely of the through passage, an index mandrel slidably located within the outer housing and having an axial bore extending therethrough, the index mandrel being movable relative to the outer housing between a first position in which the second outlet is closed and a second position in which the second outlet is open, a ball seat located on an upper end of the index mandrel, a spring located within the outer housing and biasing the index mandrel toward the first position, a ball retainable on the ball seat to prevent flow from the inlet to the first outlet, and wherein application of a first pressure on the ball forces the index mandrel against the spring into the second position and reduction of said first pressure permits return of the index mandrel to the second position.

2012006, Mar 15, 2012

Jul 1, 2011

13/174860

Jose Hurtado - Houston TX, US
John C. Wolf - Houston TX, US

SMITH INTERNATIONAL, INC. - Houston TX

E21B 33/12, E21B 34/06

166386, 166318

A downhole isolation tool including a sub, a sleeve disposed in the sub, and a ball seat mandrel coupled to the sleeve, the ball seat mandrel having at least two ball seats axially aligned with at least two throughbores disposed within the ball seat mandrel. A method of isolating a well, the method including running a downhole isolation system into a well, wherein the downhole isolation system includes a first downhole isolation tool, the first downhole isolation tool including a first sub, a first sleeve disposed in the sub, and a first ball seat mandrel coupled to the first sleeve, the first ball seat mandrel having at least two ball seats of a first size axially aligned with at least two throughbores disposed within the first ball seat mandrel, dropping at least two balls of a first size into the well, and seating the at least two balls of the first size in the at least two ball seats of the first ball seat mandrel.

2011025, Oct 27, 2011

Apr 21, 2011

13/091988

Piro SHKURTI - The Woodlands TX, US
John C. WOLF - Houston TX, US

SMITH INTERNATIONAL, INC. - HOUSTON TX

E21B 33/12, E21B 34/06

166386, 166318, 166193

An isolation device for a frac plug, the isolation device including a ball seat having a seating surface and a ball configured to contact the seating surface, wherein a profile of the seating surface corresponds to a profile of the ball. A frac plug including a mandrel having an upper end and a lower end, a sealing element disposed around the mandrel, and a ball seat disposed within a central bore of the mandrel, wherein the ball seat includes a seating surface having a non-linear profile. A method of isolating zones of a production formation, the method including setting a frac plug between a first zone and a second zone, disposing a ball within the frac plug, and seating a ball in a ball seat of the frac plug, the ball seat including a seating surface having a profile that substantially corresponds to the profile of the ball.

2012000, Jan 12, 2012

Jul 11, 2011

13/179974

Joshua Johnson - Spring TX, US
John Chrysostom Wolf - Houston TX, US

E21B 34/06, E21B 34/00

166373, 166318

A system includes a tubular string that is adapted to be deployed downhole in a well and an activation ball. The activation ball is adapted to be deployed in the tubular string to lodge in a seat of the string. The ball includes a spherical body, which is formed from a metallic material that has a specific gravity less than about 2.0.

2012000, Jan 12, 2012

Jul 11, 2011

13/180029

Tracy Speer - Houston TX, US
Piro Shkurti - The Woodlands TX, US
John Chrysostom Wolf - Houston TX, US

E21B 34/06, E21B 34/00

166373, 166318

A system includes a tubular string and a hollow ball. The tubular string is adapted to be deployed downhole in a well and includes a seat. An activation ball adapted to be deployed in the well to lodge in the seat. The ball includes an outer shell that forms a spherical surface. The outer shell forms an enclosed volume therein, and the outer shell is formed from a metallic material.

2013019, Aug 1, 2013

Jul 31, 2012

13/562452

John C. Wolf - Houston TX, US
Michael Plooy - Calgary, CA
Victor Fridman - Calgary, CA
Hanif Dussie Hunter - Houston TX, US
Barton Sponchia - Cypress TX, US
Lance Rayne - Spring TX, US

E21B 41/00

166313, 166 50

A location and orientation assembly suitable for use in a multi-lateral wellbore may include a coupling portion, an upper muleshoe, a muleshoe spacer and a bottom muleshoe. The bottom muleshoe may connect to the coupling portion through a threaded connection. A method for locating and orienting in a multi-lateral wellbore includes providing a locating and orientation assembly. In the orientation assembly a coupling portion is provided and an upper muleshoe is inserted into the coupling portion. A muleshoe spacer is inserted into the coupling portion so as to matingly contact the upper muleshoe portion. Part of a bottom muleshoe is inserted into the coupling portion so as to matingly contact the muleshoe spacer. The coupling portion is jointed to the bottom muleshoe by a threaded connection.

2010024, Sep 30, 2010

Mar 26, 2009

12/412084

Craig Fishbeck - Conroe TX, US
John C. Wolf - Houston TX, US

Smith International, Inc. - Houston TX

E21B 37/00, E21B 43/00

166311, 1661051

A downhole debris recovery tool including a ported sub coupled to a debris sub, a suction tube disposed in the debris sub, at least one magnet disposed in the debris removal tool, and an annular jet pump sub disposed in the ported sub and fluidly connected to the suction tube. A method of removing debris from a wellbore including the steps of lowering a downhole debris removal tool into the wellbore, flowing a fluid through a bore of an annular jet pump sub, jetting the fluid from the annular jet pump sub into a mixing tube, displacing an initially static fluid in the mixing tube through a diffuser, thereby creating a vacuum effect in a suction tube to draw a debris-laden fluid into the tool, flowing the debris-laden fluid past at least one magnet disposed in a debris housing, and removing the tool from the wellbore is also disclosed.