Christopher J Durrand

US Patent:

7398837, Jul 15, 2008

Filed:

Mar 24, 2006

Appl. No.:

11/277394

Inventors:

David R. Hall - Provo UT, US
Francis Leany - Provo UT, US
Christopher J. Durrand - Provo UT, US
Paula Turner - Provo UT, US

International Classification:

E21B 47/00
E21B 49/00

US Classification:

175 50, 175 40

Abstract:

In some aspects of the present invention, a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element. In some embodiments, the drill bit assembly has a shaft with an end substantially coaxial to a central axis of the assembly. The end of the shaft substantially protrudes from the working portion, and at least one downhole logging device is disposed within or in communication with the shaft.

US Patent:

7426968, Sep 23, 2008

Filed:

Apr 6, 2006

Appl. No.:

11/278935

Inventors:

David R. Hall - Provo UT, US
Francis Leany - Provo UT, US
Paula Turner - Provo UT, US
Christopher Durrand - Provo UT, US
David Lundgreen - Provo UT, US
Daryl Wise - Provo UT, US

International Classification:

E21B 47/01

US Classification:

175 40, 175 50

Abstract:

The current invention discloses a drill bit assembly with a body portion intermediate a shank portion and a working portion. The working portion may have at least one cutting element. The drill bit assembly may also have a shaft with a first end disposed within the assembly, a second end of the shaft may protrude from the working portion and at least one probe may be disposed within the shaft.

US Patent:

7453768, Nov 18, 2008

Filed:

May 9, 2006

Appl. No.:

11/382324

Inventors:

David R. Hall - Provo UT, US
Joe Fox - Provo UT, US
Christopher Durrand - Provo UT, US

International Classification:

E21B 47/12

US Classification:

367 82, 367 25, 367 81, 3408531, 3408533, 3408537, 3408563

Abstract:

In one aspect of the invention, a high-speed measurement system has a first and a second well bore. A first and second plurality of network nodes is integrated into and spaced at intervals along the first and second well bore, respectively. A communications channel connects each plurality of network nodes forming a first and second downhole network. A signal source is in communication with the first downhole network and a signal receiver is in communication with the second downhole network; and a common clock source is in communication with both the signal source and the signal receiver over the first and second downhole networks, respectively. The signal source and signal receiver are synchronized with the clock source and the signal source is adapted to send a signal to the signal receiver through a subterranean formation.

US Patent:

7572134, Aug 11, 2009

Filed:

Apr 19, 2007

Appl. No.:

11/737178

Inventors:

David R. Hall - Provo UT, US
Christopher Durrand - Provo UT, US
Joe Fox - Provo UT, US
Tyson J. Wilde - Provo UT, US

International Classification:

H01R 4/64

US Classification:

439194

Abstract:

A downhole tool string component having a tubular body having a bore with a central longitudinal axis. An electrical conductor assembly is disposed within the bore of the tubular component, the assembly having signal couplers at first and second ends adapted for a butt connection. Centering assemblies are disposed within each end of the bore and have a plurality of projections extending radially outward from at least a partial central ring disposed around a portion of each end of the electrical conductor assembly, at least one centering assembly comprising a radial opening in the central ring adapted to receive the electrical conductor assembly. The first and second ends of the electrical conductor assembly are substantially aligned to the central axis of the bore at each end by the centering assemblies, the centering assemblies being adapted to allow fluid to pass through the bore.

US Patent:

7598886, Oct 6, 2009

Filed:

Apr 21, 2006

Appl. No.:

11/379729

Inventors:

David R. Hall - Provo UT, US
Christopher Durrand - Provo UT, US
Paula Turner - Provo UT, US
Joe Fox - Provo UT, US

International Classification:

G01V 1/00

US Classification:

3408546, 3408544, 175 50, 367 82

Abstract:

A system for communicating with a downhole network integrated into a downhole drill string is disclosed in one aspect of the invention as including a data transmission coupler mounted to a downhole tool and adapted to transmit data across a tool joint. The data transmission coupler is also capable of transmitting data by emitting electromagnetic radiation. An antenna is focused at and positioned within sufficient range of the data transmission coupler to detect the electromagnetic radiation and receive the data. This data may then be transmitted to a receiver or other equipment. In certain embodiments, the antenna is located above ground level and may be mounted to a swivel, derrick, hoist system, kelly, or other structure. The antenna is ideally mounted to a structure which is out of the way of equipment and workers working on the drill string.

US Patent:

7946656, May 24, 2011

Filed:

Jun 9, 2008

Appl. No.:

12/135595

Inventors:

David R. Hall - Provo UT, US
Scott Dahlgren - Alpine UT, US
Jonathan Marshall - Provo UT, US
Italo Elqueta - Lehi UT, US
Tyson J. Wilde - Spanish Fork UT, US
Christopher Durrand - Pleasant Grove UT, US

Assignee:

Schlumberger Technology Corporation - Houston TX

International Classification:

E21C 35/197

US Classification:

299111, 299113, 299107

Abstract:

A retention assembly, comprises a carbide bolster comprising a cavity formed in its base end. A shaft comprises an inserted end disposed within the cavity. The shaft is disposed within a hollow shank which comprises a first end contacting the bolster and a loaded end in mechanical communication with the shaft. Wherein, the inserted end is brazed to an inner surface of the cavity.

US Patent:

7969819, Jun 28, 2011

Filed:

Mar 6, 2007

Appl. No.:

11/682758

Inventors:

David R. Hall - Provo UT, US
Christopher Durrand - Pleasant Grove UT, US

Assignee:

Schlumberger Technology Corporation - Houston TX

International Classification:

G01V 1/00

US Classification:

367 80, 3408533

Abstract:

A method for taking seismic measurements that includes a downhole sensor positionable within a tool string located within the bore of a well, the tool string having a network which effects communication with a downhole sensor. The downhole sensor includes a downhole clock that may be placed in communication over the network with the top-hole clock for synchronization. A seismic source is positioned within a transmitting distance of the downhole sensor and activated at a time when the network is disconnected. The downhole sensor records signals from the seismic source at along with a downhole timestamp from the downhole clock. When the network is reconnected, the downhole clock and the top-hole clock are re-synchronized and any downhole clock drift is calculated. The recorded downhole timestamp may then be adjusted to reflect what it would have been if the downhole clock had been synchronized with the top-hole clock.

US Patent:

8033615, Oct 11, 2011

Filed:

Jun 9, 2008

Appl. No.:

12/135714

Inventors:

David R. Hall - Provo UT, US
Scott Dahlgren - Alpine UT, US
Jonathan Marshall - Provo UT, US
Italo Elqueta - Lehi UT, US
Tyson J. Wilde - Spanish Fork UT, US
Christopher Durrand - Pleasant Grove UT, US

Assignee:

Schlumberger Technology Corporation - Houston TX

International Classification:

E21C 35/197

US Classification:

299113

Abstract:

A retention assembly has a carbide bolster with a first and second segment brazed together, each segment forming at least part of a cavity formed of the bolster. A shaft has an inserted end is interlocked within the cavity.