1
Paul O Padgett, Stephen F Crain, Wayne A Handke, Jerry L Logan, Calvin L Stegemoeller, Ricky L Covington, David W Ritter, Kevin D Edgley: Continuous multi-component slurrying process at oil or gas well. Halliburton company, Craig W Roddy, E Harrison Gilbert III, November 5, 1996: US05570743 (84 worldwide citation)

A continuous multi-component slurrying process at an oil or gas well comprises flowing at least three separate streams of different essential materials directly into a predetermined mixing unit at the oil or gas well, wherein each of the essential materials is required to obtain a predetermined defi ...


2
Audis C Byrd, David W Ritter, Ronald G Dusterhoft: Surface pulse system for injection wells. Halliburton Energy Services, John W Wustenberg, Baker Botts L, April 11, 2006: US07025134 (72 worldwide citation)

The present invention relates to petroleum recovery operations, and more particularly, to the use of pulse technology to enhance the effectiveness of waterflooding operations. The systems of the present invention generally comprise an injection means for continually injecting a fluid into the subter ...


3
Paul D Lord, Rodney B Waltman, David W Ritter, Sanjay Vitthal: Viscosified treatment fluids and associated methods of use. Halliburton Energy Services, Robert A Kent, Fletcher Yoder & Van Someren, January 23, 2007: US07165617 (47 worldwide citation)

In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a density of greater than 9 pounds per gallon and a crosslinked viscosifying agent, and contacting the port ...


4
Ronald G Dusterhoft, Bradley L Todd, David W Ritter, Larry S Eoff: Methods useful for controlling fluid loss in subterranean formations. Halliburton Energy Services, Robert A Kent, McDermott Will & Emery, January 10, 2012: US08091638 (43 worldwide citation)

Methods of controlling fluid loss in a subterranean formation comprising: providing a treatment fluid comprising an aqueous fluid and a fluid loss control additive comprising a water-soluble polymer having hydrophobic or hydrophilic modification; introducing the treatment fluid into an interval of a ...


5
Ignatius S A Bezzam, David W Ritter: Large swing wide band high order programmable active filters. Raytheon Company, Sarah L Byrne, March 31, 1998: US05734294 (33 worldwide citation)

A wide band, high-order, programmable video filter is implemented using transimpedance-based active integrators. An input voltage which may for instance represent a composite video signal is converted to a current in a linear manner using resistors and provided to a current amplifier at low impedanc ...


6
Paul D Lord, Rodney B Waltman, David W Ritter, Sanjay Vitthal: Viscosified treatment fluids and associated methods of use. Halliburton Energy Services, Robert A Kent, Baker Botts L, November 27, 2007: US07299876 (33 worldwide citation)

In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a density of greater than 9 pounds per gallon and a crosslinked viscosifying agent, and contacting the port ...


7
David W Ritter: Remotely controlled sound mask. Sound Mist, Steele Gould & Fried, August 11, 1987: US04686693 (24 worldwide citation)

A sound masking apparatus especially useful for setting background noise levels in discrete zones includes a signal source, power amplifier, programmable attenuator and remote control. The remote control is a short range radio transmitter that sends a series of pulses that are decoded to control the ...


8
David W Ritter: Images in interlaced formats: a novel method of scan conversion for video imaging systems. Chrontel, Flehr Hohbach Test Albritton & Herbert, August 28, 2001: US06281933 (19 worldwide citation)

A two-dimensional (2D) filter is disclosed that accomplishes flicker filtering with virtually no loss of image resolution. The 2D filter operates without adaption and only on the non-detail portions of the original image. The filter works first in the horizontal (x-axis) direction by separating the ...


9
David W Ritter, Anthony Zortea: Video signal processor. Videotek, Steele Gould & Fried, March 7, 1989: US04811097 (15 worldwide citation)

In one embodiment, the video signal generator outputs a standardized analog video signal. The signal generator includes a clock controlling a sequential address generator. The address generator activates a memory device that is, for example, a ROM. A distortion conditioned standardized digital video ...


10
Paul O Padgett, Stephen F Crain, Wayne A Handke, Jerry L Logan, Calvin L Stegemoeller, Ricky L Covington, David W Ritter, Kevin D Edgley: Continuous multi-component slurrying process at oil or gas well. Halliburton Company, Craig W Roddy, Stephen R Christian, E Harrison Gilbert III, June 4, 1996: US05522459 (13 worldwide citation)

A continuous multi-component slurrying process at an oil or gas well comprises flowing at least three separate streams of different essential materials directly into a predetermined mixing unit at the oil or gas well, wherein each of the essential materials is required to obtain a predetermined defi ...