David Leo Bullock

US Patent:

7600582, Oct 13, 2009

Filed:

Aug 18, 2006

Appl. No.:

11/506325

Inventors:

Ronald (Riff) F. Wright, Jr. - Weatherford TX, US
David G. Bullock - Weatherford TX, US

Assignee:

Texas HDD, LLC - Weatherford TX

International Classification:

E21B 47/00
E21B 17/00

US Classification:

175 40, 1662425

Abstract:

An instrument housing for a drill string, comprising: a cylindrical housing having a cavity for receiving an instrument assembly such as a transmitter sonde; an elongated side load opening disposed parallel with and toward one end of the cavity and formed through a side of the cylindrical housing into the cavity. The side load opening is substantially shorter than the length of the instrument assembly; and an elongated side load door assembly is configured to fit within the side load opening, to enclose and secure the instrument assembly within the cylindrical housing such that the instrument is protected from loss or damage due to loss or damage to the side load door during operation.

US Patent:

8122979, Feb 28, 2012

Filed:

Dec 18, 2009

Appl. No.:

12/642710

Inventors:

David G. Bullock - Weatherford TX, US

Assignee:

Radius HDD Direct, LLC - Perry OK

International Classification:

E21B 10/62

US Classification:

175398, 175424

Abstract:

An offset rock bit () has a steering face () and a shoe () provided by a recess formed into the steering face (). A slot () formed into the shoe () for receiving a pull back adapter () in a centrally located position in the forward end of the offset rock bit (). The pull back adapter () has a pull back eye () with a central axis () which is aligned with a centrally disposed longitudinal axis () of the offset rock bit () and the tool string (). This aligns the pull back eye () of the pull back adapter () with a borehole formed using the offset rock bit (). The pull back adapter () also includes side edges () which are configured for centering the pull back adapter () and pull back conduit within the borehole.

US Patent:

8544569, Oct 1, 2013

Filed:

Feb 22, 2012

Appl. No.:

13/402651

Inventors:

Ronald F. Wright - Weatherford TX, US
David G. Bullock - Weatherford TX, US

Assignee:

Radius HDD Direct, LLC - Perry OK

International Classification:

E21B 10/62

US Classification:

175398, 175 62, 175424

Abstract:

An offset rock bit () has a steering face () and a shoe () provided by a recess formed into the steering face (). A slot () formed into the shoe () for receiving a pull back adapter () in a centrally located position in the forward end of the offset rock bit (). The pull back adapter () has a pull back eye () with a central axis () which is aligned with a centrally disposed longitudinal axis () of the offset rock bit () and the tool string (). This aligns the pull back eye () of the pull back adapter () with a borehole formed using the offset rock bit (). The pull back adapter () also includes side edges ( ) which are configured for centering the pull back adapter () and pull back conduit within the borehole.

US Patent:

59683740, Oct 19, 1999

Filed:

Mar 20, 1997

Appl. No.:

8/822588

Inventors:

David M. Bullock - Highland Village TX

Assignee:

Lam Research Corporation - Fremont CA

International Classification:

H01B 1300
B44C 122

US Classification:

216 16

Abstract:

A method in a variable-gap plasma processing chamber for controlled removal of at least a portion of an upper crust of a photoresist layer disposed above a substrate. The upper crust represents a hardened upper layer of the photoresist layer. The method includes loading the substrate into the variable-gap plasma processing chamber. The method further includes flowing an ash source gas comprising O. sub. 2 into the variable-gap plasma processing chamber. The ash source gas is substantially free of an O. sub. 2 bombarding gas. The method further includes performing the controlled removal of at least the portion of the upper crust of the photoresist layer with a plasma struck from the ash source gas while a gap between an upper surface of the substrate and an upper electrode of the variable-gap plasma processing chamber is maintained at a predefined wide gap distance. Preferably, the predefined wide gap distance represents a distance sufficiently wide for the substrate to be loaded into the variable-gap plasma chamber without having to alter the gap.

US Patent:

39965767, Dec 7, 1976

Filed:

Mar 17, 1975

Appl. No.:

5/559627

Inventors:

David Carl Bullock - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G11C 1114
G11C 1142

US Classification:

340174TF

Abstract:

A magnetic bubble detector utilizing a thin film optical waveguide. Light is optically coupled into the guide for propagation of linearly polarized light along a first axis thereof. Magnetic bubbles from a memory storage location are moved past the sensor on a second axis transverse the first. A sensor is provided for sensing changes in the polarization mode of the light propagating along the axis of the waveguide. The sensor includes an optical device for coupling light out of the waveguide. The passage of a magnetic bubble along the second axis past the waveguide will modulate the polarized light by the fringing field of the bubble and provide a light output signal from the sensor indicating the passage of each bubble.

US Patent:

40865711, Apr 25, 1978

Filed:

Feb 24, 1977

Appl. No.:

5/771702

Inventors:

David Carl Bullock - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G11C 1908

US Classification:

365 36

Abstract:

Magnetic bubble domain generator and annihilator for use in a magnetic bubble domain memory device of the major-minor bubble propagation path type. The magnetic bubble domain generator and annihilator structure employs a thin metallic loop which is disposed adjacent to a bubble propagation path and is alternatively operable in both a bubble generation and bubble annihilation mode. A DC bias field is provided to the magnetic bubble domain memory circuit device and exists within the metallic loop of the bubble generator and annihilator structure. Upon applying a current pulse to the thin metallic loop from a pulse generator, the bubble generator and annihilator structure is caused to operate in one of the two possible modes. When the current pulse reduces the DC bias field below a predetermined value, the metallic loop operates as a generator to generate a magnetic bubble. Conversely, when the current pulse raises the DC bias field within the metallic loop above a predetermined value, a magnetic bubble within the loop is annihilated.

US Patent:

40865720, Apr 25, 1978

Filed:

Feb 23, 1977

Appl. No.:

5/771293

Inventors:

David Carl Bullock - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G11C 1908

US Classification:

365 12

Abstract:

Magnetic bubble domain replicator structure as employed in a magnetic bubble domain memory circuit device of the major-minor bubble propagation path type. The magnetic bubble domain replicate structure comprises a thin metallic conducting loop whose opposite sides are in contact with consecutive elements of magnetically soft material (e. g. , permalloy) defining a propagation path aligned transversely with respect to a minor bubble propagation path employed for data storage. A DC bias field is provided for the magnetic bubble domain memory circuit and exists within the thin metallic loop of the replicate structure. The occurrence of a current pulse from a pulse generator directed to the thin metallic loop so as to reduce the DC bias field therein below a predetermined value at the same time that a magnetic bubble is within the metallic loop causes replication splitting the magnetic bubble into a pair of bubbles.

US Patent:

40400190, Aug 2, 1977

Filed:

Aug 23, 1974

Appl. No.:

5/499823

Inventors:

David Carl Bullock - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G11C 1114

US Classification:

340174TF

Abstract:

A magnetic bubble domain memory device employing a major row of contiguous regions for major loop bubble travel and a plurality of minor rows of contiguous regions for minor loop bubble travel, wherein the remainder of the magnetic domain-supporting layer in which the respective major and minor rows are provided includes ion-implanted regions. The edges of the ion-implanted regions adjacent the major and minor rows form rails to which magnetic bubble domains adhere and along which they may be propagated. The end region of each minor row is preferably positioned abreast a cusp between regions in the major row to effect zero degree phase transfer. Thin metallic loops are used for bubble generation and annihilation and, with respect to a Permalloy expansion detector, for replication. Metal masking improves the reliability of the boundaries between the non-implanted regions and the ion-implanted regions, especially with respect to the definition of the cusps between adjacent non-implanted regions in a row.