JOHN R MARSHALL, DO
Psychiatric at Cooper St, Arlington, TX
License number
Texas G5333
Category
Psychiatric
Type
Addiction Psychiatry
Address
Address
1107 N Cooper St, Arlington, TX 76011
Phone
(817) 860-6067
(817) 860-6016 (Fax)
(817) 860-6016 (Fax)
Professional information
Dr. John R Marshall, Fort Worth TX - DO (Doctor of Osteopathic Medicine)
Specialties:
Family Medicine, Addiction Medicine
Address:
2201 Loop 820 SE, Fort Worth 76119
1107 N Cooper St STE 109, Arlington 76011
(817) 860-6016 (Fax)
1107 N Cooper St STE 109, Arlington 76011
(817) 860-6016 (Fax)
Languages:
English
Hospitals:
2201 Loop 820 SE, Fort Worth 76119
1107 N Cooper St STE 109, Arlington 76011
Medical Center of Lewisville
500 West Main St, Lewisville 75057
1107 N Cooper St STE 109, Arlington 76011
Medical Center of Lewisville
500 West Main St, Lewisville 75057
Education:
Medical School
University of North Texas Health Science Center / Texas College of Osteopathic Medicine
Graduated: 1983
University of North Texas Health Science Center / Texas College of Osteopathic Medicine
Graduated: 1983
Method For Normalizing Signals In A Cement Bond Logging Tool
US Patent:
7414918, Aug 19, 2008
Filed:
Sep 23, 2005
Appl. No.:
11/233985
Inventors:
Brian Hurst - Mineral Wells TX, US
John L. Marshall - Arlington TX, US
John L. Marshall - Arlington TX, US
Assignee:
Probe Technology Services, Inc. - Fort Worth TX
International Classification:
G01V 1/40, G01V 1/44, G01V 1/52
US Classification:
367 35, 367 25, 181105, 181106
Abstract:
A longitudinally segmented acoustic transducer for a cement bond logging (CBL) tool having a plurality of adjoining PZT ring-like segments driven synchronously in parallel by one or more pulses and caused to vibrate in an anti-resonant mode, substantially below the resonant frequency of an individual segment when used in a transmitting application. When used in a receiving application, each of the plurality of transducer rings are caused to vibrate by acoustic signals detected by the transducer array, also in an anti-resonant mode. High speed digital signal processing enables on-depth, high quality data for all azimuths at each depth to be obtained, processed, normalized and either sent to the surface in real time for each 20 Hz firing cycle, as the CBL tool is pulled toward the surface, or stored in a memory module in digital form for later retrieval. Built-in calibration factors used for normalizing the output signals to the operating conditions of use may be accessed at any time.
Firing Trigger Apparatus And Method For Downhole Tools
US Patent:
7802619, Sep 28, 2010
Filed:
Sep 3, 2008
Appl. No.:
12/231469
Inventors:
Brian W. Hurst - Mineral Wells TX, US
John L. Marshall - Arlington TX, US
David S. Wesson - Granbury TX, US
John L. Marshall - Arlington TX, US
David S. Wesson - Granbury TX, US
Assignee:
Probe Technology Services, INc. - Forth Worth TX
International Classification:
E21B 29/02, E21B 43/1185
US Classification:
166 63, 166299, 16625001
Abstract:
Methods and devices are provided for controlling detonation of explosives in a well bore for perforation or a well bore casing, which avoid or reduce unintentional or undesirable detonations while ensuring or increasing desirable detonations. An explosive trigger system or tool may comprise a central processing unit (CPU), memory, and one or more sensors disposed for measuring one or more downhole conditions. Downhole conditions may be measured with the sensor and then used to program detonation parameters (such as temperature or pressure) or preconditions (such as time or distance traveled) to the trigger system. Detonation can only occur when the programmed parameters or preconditions are satisfied. In this way, undesirable detonations are avoided by requiring certain preconditions to arming the trigger system. To further control arming and/or detonating, a line sequencer may be provided, wherein energy is propagate down along the physical deployment line as pulses or line “jerks” through mechanical manipulations of physical deployment line near surface.
Method For Processing Signals In A Cement Bong Logging Tool
US Patent:
7411864, Aug 12, 2008
Filed:
Sep 23, 2005
Appl. No.:
11/233720
Inventors:
Brian Hurst - Mineral Wells TX, US
John L. Marshall - Arlington TX, US
David M. O'Connor - Burleson TX, US
John L. Marshall - Arlington TX, US
David M. O'Connor - Burleson TX, US
Assignee:
Probe Technology Services, Inc. - Fort Worth TX
International Classification:
G01V 1/48
US Classification:
367 35, 367 25, 367 33, 3408533
Abstract:
A longitudinally segmented acoustic transducer for a cement bond logging (CBL) tool having a plurality of adjoining PZT ring-like segments driven synchronously in parallel by one or more pulses and caused to vibrate in an anti-resonant mode, substantially below the resonant frequency of an individual segment when used in a transmitting application. When used in a receiving application, each of the plurality of transducer rings are caused to vibrate by acoustic signals detected by the transducer array, also in an anti-resonant mode. High speed digital signal processing enables on-depth, high quality data for all azimuths at each depth to be obtained, processed, normalized and either sent to the surface in real time for each 20 Hz firing cycle, as the CBL tool is pulled toward the surface, or stored in a memory module in digital form for later retrieval. Built-in calibration factors used for normalizing the output signals to the operating conditions of use may be accessed at any time.
Method For Initializing Receiver Channels In A Cement Bond Logging Tool
US Patent:
8270248, Sep 18, 2012
Filed:
Feb 11, 2011
Appl. No.:
13/025641
Inventors:
Brian Hurst - Mineral Wells TX, US
John L. Marshall - Arlington TX, US
John L. Marshall - Arlington TX, US
Assignee:
Probe Technology Services, Inc. - Fort Worth TX
International Classification:
G01V 1/40
US Classification:
367 34, 367 13
Abstract:
A method for initializing the input of each of m receiver channels of a receiving transducer in a well logging tool comprising the steps of selecting a logging tool having a multi-element receiving transducer wherein each element of the multi-element receiving transducer operates in an anti-resonant mode below its resonant frequency, and executing a routine in an initialization mode wherein a predetermined number of run cycles are operated and receiver input responses are measured and averaged for each of the m channels while transmitter firing signals are disabled.
Method For Initializing Receiver Channels In A Cement Bond Logging Tool
US Patent:
7911876, Mar 22, 2011
Filed:
Jun 25, 2008
Appl. No.:
12/145813
Inventors:
Brian Hurst - Mineral Wells TX, US
John L. Marshall - Arlington TX, US
John L. Marshall - Arlington TX, US
Assignee:
Probe Technology Services, Inc. - Fort Worth TX
International Classification:
G01V 1/40
US Classification:
367 25, 367 35, 181102, 702 6
Abstract:
A method for initializing the input of each of m receiver channels of a receiving transducer in a well logging tool comprising the steps of selecting a logging tool having a multi-element receiving transducer wherein each element of the multi-element receiving transducer operates in an anti-resonant mode below its resonant frequency, and executing a routine in an initialization mode wherein a predetermined number of run cycles are operated and receiver input responses are measured and averaged for each of the m channels while transmitter firing signals are disabled.