JOHN KERSEY CAMPBELL, MA, LPC
Social Work at Oak Park Trails Dr, Katy, TX

5154231, Oct 13, 1992

Sep 19, 1990

7/585532

Thomas F. Bailey - Houston TX
John E. Campbell - Houston TX
Larry F. Moeller - Houston TX

MASX Energy Services Group, Inc. - Houston TX

E21B 708, E21B 2906

166298

A one-trip whipstock assembly incorporating a hydraulically set anchor which includes an interlock for maintaining the anchor in its set position upon interruption of hydraulic pressure. The anchor is connected to the lower end of the assembly which also includes a whipstock for diverting cutting tools and a locator sub for positioning the assembly in the cased well bore. The whipstock assembly is designed to be run into the well using a running string or a mill attached to the upper end of the whipstock in order to locate and set the whipstock and mill the casing in only one trip.

4722615, Feb 2, 1988

Apr 14, 1986

6/851828

Thomas F. Bailey - Houston TX
John Campbell - Houston TX

A-Z International Tool Company - Houston TX

E21B 1032, E21B 1022, F16C 1710, F16J 908

384 96

An underreamer including a body having a bore therethrough, an arm mounted at its upper end to the body, a conical cutter mounted for rotation on the lower end of each arm, a cup-shaped thrust bearing between the cutter and the arm, means extending through the arm to secure the cutter on the arm including pin elements that extend into a groove in the cutter to prevent rotation movement between the arm and the thrust bearing to lock the thrust bearing to the arm. The arms are pivotally mounted in slots in the body and means are provided for moving the arms to their cutting position with their lower ends positioned radially outward from the body.

6648069, Nov 18, 2003

Jun 12, 2002

10/171215

Charles H. Dewey - Houston TX
John E. Campbell - Houston TX
Wei Xu - Houston TX

Smith International, Inc. - Houston TX

E21B 4400

166 50, 1661176, 1662426, 175 61, 175 62

The well reference apparatus and method of the present invention includes a reference member preferably permanently installed within the borehole at a preferred depth and orientation in one trip into the well. The reference member provides a permanent reference for the location of all operations, particularly in a multi-lateral well. The assembly of the present invention includes disposing the reference member on the end of a pipe string. An orienting tool such as an MWD collar is disposed in the pipe string above the reference member. This assembly is lowered into the borehole on the pipe string. Once the preferred depth is attained, the MWD is activated to determine the orientation of the reference member. If the reference member is not oriented in the preferred direction, the pipe string is rotated to align the reference member in the preferred direction. This process is repeated for further corrective action and to verify the proper orientation of the reference member.

6499538, Dec 31, 2002

Apr 8, 1999

09/288401

Charles H. Dewey - Houston TX
John E. Campbell - Houston TX

Smith International, Inc. - Houston TX

E21B 2906

166297, 1661175, 166 553

Methods and apparatus are described for forming a window of optimum dimensions in casing wall. A window of maximum width is cut when the center line of the mill tool is located inside of the inner diameter of the casing where a maximum amount of casing is drilled away by the mill tool. A whipstock is described which deviates the mill tool outwardly so that the center line of the mill tool is in approximately this position. The whipstock then maintains the mill tool at this approximate location until a window of desired length is cut having a substantially maximum width.

5657820, Aug 19, 1997

Dec 14, 1995

8/572592

Thomas F. Bailey - Pebblebrook TX
John E. Campbell - Houston TX
Joseph V. Hebert - Tomball TX

Smith International, Inc. - Houston TX

E21B 708

166 557

A two trip sidetrack casing milling apparatus for elongating and enlarging a previously formed window in a cased borehole in preparation for a subsequent sidetracking drilling operation is disclosed. The apparatus consists of three mills on a shaft, a first window mill is secured to an end of a shaft. The first window mill forms a diameter larger than a diameter of a subsequent sidetracking drill bit that is passed through the window. A second pilot mill is secured to the shaft and strategically positioned above the first window mill. The second pilot mill forms a diameter that is less than the diameter of the first window mill. A third watermelon mill is secured to the shaft and strategically positioned above the second pilot mill. The third watermelon mill forms a diameter that is at least the same diameter as the first window mill. The second, smaller in diameter pilot mill serves to move toward the window thereby straightening the shaft while further cutting a portion of the casing surrounding the window thus assuring a more stable and accurate sidetrack direction.

5062450, Nov 5, 1991

Oct 5, 1990

7/593181

Thomas F. Bailey - Houston TX
John E. Campbell - Houston TX

MASX Energy Services Group, Inc. - Houston TX

F16K 1506

13753321

A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the valve head. A urethane valve insert may also be provided to facilitate sealing engagement with the valve seat. The urethane legs reduce the overall weight of the valve to reduce the mass of the pumping valve against the valve seat thereby extending the life of the valve. The valve legs are attached to the valve head through fitting engagement and can be replaced and/or repaired.

2013021, Aug 22, 2013

Feb 20, 2013

13/772165

SMITH INTERNATIONAL, INC. - , US
JOHN E. CAMPBELL - HOUSTON TX, US
SHANTANU N. SWADI - CYPRESS TX, US
PHILIP M. GREGUREK - PEARLAND TX, US

SMITH INTERNATIONAL, INC. - HOUSTON TX

E21B 7/06, E21B 33/13

166285, 1661175, 1661176, 166297

A system and method facilitate sidetracking by eliminating one or more trips downhole. A sidetracking system includes a whipstock assembly and a stinger assembly. The stinger assembly has a stinger which extends at least partially through the whipstock assembly. The stinger is coupled to a sub of the sidetracking system by a releasable latch mechanism, such as a shear pin or collet.

5213158, May 25, 1993

Dec 20, 1991

7/811553

Thomas F. Bailey - Houston TX
John E. Campbell - Houston TX

MASX Entergy Services Group, Inc. - Houston TX

E21B 33068

166 82

A drilling head with dual rotating stripper rubbers designed for high pressure drilling operations ensuring sealing under the extreme conditions of high flow or high pressure wells such as horizontal drilling. The dual stripper rubbers seal on the same diameter yet are manufactured of different materials for different sealing functions. The lower stripper rubber is manufactured from a more rigid, abrasive resistant material to divert the flow from the well. The upper stripper rubber is manufactured of a softer sealing material that will closely conform to the outer diameter of the drill string thereby preventing the flow of fluids through the drilling head.

7506703, Mar 24, 2009

Jan 18, 2006

11/334195

John E. Campbell - Houston TX, US
Charles H. Dewey - Houston TX, US
Lance D. Underwood - Cypress TX, US
Ronald G. Schmidt - Tomball TX, US

Smith International, Inc. - Houston TX

E21B 10/32

175265, 175263, 175267, 175288

An expandable drilling apparatus is deployed upon a distal end of a drillstring and includes a cutting head and a substantially tubular main body adjacent the cutting head providing a plurality of axial recesses configured to receive arm assemblies configured to translate between a retracted and an extended position. A flow switch actuates the arm assemblies when a drilling fluid pressure exceeds an activation value and the drilling apparatus includes a biasing member to reset the arm assemblies when the drilling fluid pressure falls below a reset value.