Robert W Gissler

US Patent:

6349767, Feb 26, 2002

Filed:

May 13, 1998

Appl. No.:

09/076964

Inventors:

Robert W. Gissler - Spring TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 1714

US Classification:

1662426, 166384, 166385, 285 2, 403316, 403331

Abstract:

A disconnect tool includes a housing that has a first segment and a second segment. A first collet is coupled to the first segment and has a first plurality of fingers, each of the first plurality of fingers is bendable between a first position in which the fingers engage the first segment and prevent relative sliding movement between the first and second segments, and a second position in which the fingers do not engage the first segment and do not prevent relative sliding movement between the first and second segments. A first piston is positioned in the housing and has a third position wherein the piston engages and prevents the fingers from bending from the first position, and a fourth position wherein the piston does not engage and prevent the fingers from bending from the first position. The disconnect tool includes means for selectively retaining the first piston in the third position and means for moving the first piston from the third position to the fourth position. On-board and surface control systems may be incorporated to permit selective active of the disconnect mechanism.

US Patent:

7503385, Mar 17, 2009

Filed:

May 9, 2006

Appl. No.:

11/430817

Inventors:

Timothy R. Tips - Spring TX, US
Robert Gissler - Spring TX, US

Assignee:

Welldynamics, Inc. - Spring TX

International Classification:

E21B 34/10

US Classification:

166 72, 166319

Abstract:

A single line control module for well tool actuation. A well tool control system includes an actuator, a control module for controlling pressure applied to the actuator, and a single line extending between the control module and a remote location, elevated pressure being applied to the line and exhausted from the line at the remote location to operate the actuator. Another well tool control system includes an actuator having first and second chambers, a line for applying elevated pressure to the actuator to operate the actuator, and a control module including an accumulator, and a valve. The valve has a first position in which the line is connected to the first chamber and the accumulator is connected to the second chamber, and a second position in which the line is connected to the second chamber and the accumulator is connected to the first chamber.

US Patent:

7673683, Mar 9, 2010

Filed:

Jan 18, 2007

Appl. No.:

11/624282

Inventors:

Robert W. Gissler - Spring TX, US

Assignee:

Welldynamics, Inc. - Spring TX

International Classification:

E21B 47/09
E21B 31/06

US Classification:

1662551, 166 665, 16625001

Abstract:

A well tool having a magnetically coupled position sensor. In operation of a well tool, relative displacement is produced between members of the well tool. A magnetically coupled position sensor includes one magnet assembly attached to a member for displacement therewith and another magnet assembly movably attached to the other member and magnetically coupled to the first magnet assembly for displacement therewith. The position sensor further includes a magnetically permeable material which increases a magnetic flux density between the magnet assemblies. In another position sensor, one magnet assembly includes a magnet having a pole axis, the other magnet assembly includes another magnet having another pole axis, and the pole axes are aligned with each other.

US Patent:

7779912, Aug 24, 2010

Filed:

Feb 27, 2007

Appl. No.:

11/679793

Inventors:

Robert W. Gissler - Spring TX, US

Assignee:

Welldynamics, Inc. - Spring TX

International Classification:

E21B 47/09
E21B 31/06

US Classification:

1662551, 166 665, 16625001

Abstract:

A well tool having a magnetically coupled position sensor. In operation of a well tool, relative displacement is produced between members of the well tool. A magnetically coupled position sensor includes one magnet assembly attached to a member for displacement therewith and another magnet assembly movably attached to the other member and magnetically coupled to the first magnet assembly for displacement therewith. The position sensor further includes a magnetically permeable material which increases a magnetic flux density between the magnet assemblies. The magnetically permeable material may be positioned between magnets of the magnet assemblies and/or spaced apart therefrom.

US Patent:

8196656, Jun 12, 2012

Filed:

Sep 8, 2008

Appl. No.:

12/206291

Inventors:

Robert Gissler - Spring TX, US

Assignee:

Welldynamics, Inc. - Spring TX

International Classification:

E21B 47/09

US Classification:

1662551, 175 45

Abstract:

A position sensor for well tools. A position sensor includes an indicator portion including a carrier supporting a resistive element and at least one contact, and a support device for supporting the carrier. Another position sensor includes an indicator portion including a slider for displacing at least one contact relative to a resistive element, the slider being displaceable between first and second limits, and an end load mechanism including a biasing device which exerts a biasing force on the slider as the slider approaches at least the first limit. Another position sensor includes an indicator portion including a resistive element and at least one contact which contacts and displaces across the resistive element, a change in position of the contact relative to the resistive element being indicated by a resistance change as the contact displaces across the resistive element.

US Patent:

20120256635, Oct 11, 2012

Filed:

May 11, 2012

Appl. No.:

13/469228

Inventors:

Robert W. GISSLER - Spring TX, US

Assignee:

WELLDYNAMICS, INC. - Spring TX

International Classification:

G01V 3/18

US Classification:

324347

Abstract:

A position sensor for well tools. A position sensor includes an indicator portion including a carrier supporting a resistive element and at least one contact, and a support device for supporting the carrier. Another position sensor includes an indicator portion including a slider for displacing at least one contact relative to a resistive element, the slider being displaceable between first and second limits, and an end load mechanism including a biasing device which exerts a biasing force on the slider as the slider approaches at least the first limit. Another position sensor includes an indicator portion including a resistive element and at least one contact which contacts and displaces across the resistive element, a change in position of the contact relative to the resistive element being indicated by a resistance change as the contact displaces across the resistive element.

US Patent:

62731890, Aug 14, 2001

Filed:

Feb 5, 1999

Appl. No.:

9/245468

Inventors:

Robert W. Gissler - Spring TX
Michael W. Holcombe - Spring TX
Daniel Purkis - Aberdeen, GB

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 1710
B60K 100
F16L 128

US Classification:

1662411

Abstract:

A downhole tractor is provided that includes a housing and a first wheel assembly coupled to the housing that is operable to translate away from the housing in a first direction. The first wheel assembly has a first electric motor, a first wheel, and a first reduction gear assembly coupled between the first electric motor and the first wheel. A second wheel assembly is coupled to the housing and is operable to translate away from the housing in a second direction that is opposite to the first direction. The second wheel assembly has a second electric motor, a second wheel, and a second reduction gear assembly coupled between the second electric motor and the second wheel. A fluid ram is coupled to the first and second wheel assemblies for selectively translating the first and second wheel assemblies toward and away from the housing. A first controller is provided for controlling the flow of current to the first and second electric motors. On-board and surface control systems may be incorporated to permit selective active of the wheels assemblies.

US Patent:

56800495, Oct 21, 1997

Filed:

Dec 11, 1995

Appl. No.:

8/570113

Inventors:

Robert W. Gissler - Spring TX
Otto Fanini - Stafford TX
Jacques Maissa - Roswell NM
H. Wade Bullock - Houston TX
Peter Rellinger - Cypress TX

Assignee:

Western Atlas International, Inc. - Houston TX

International Classification:

G01V 324

US Classification:

324368

Abstract:

An apparatus for measuring the resistivity of earth formations penetrated by a wellbore having a conductive conduit. The apparatus includes an elongated sonde mandrel, a plurality of electrodes positioned at axially spaced apart locations along the mandrel, the electrodes being electrically insulated from the mandrel and from each other, the electrodes adapted to electrically contact the conduit and positioned collinearly so that the electrodes contact the conduit when the mandrel is radially displaced towards the wall of the conduit. Some electrodes are for injecting electrical current into the conduit, other electrodes are for measuring voltage drop along the conduit at axially spaced apart locations. The mandrel includes selectively extensible locking arms for urging the mandrel into contact with the conduit. The arms are radially positioned opposite to the electrodes.