(under subclass 152.01) Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by measuring pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37, for performing a test by use of fluid pressure.
152.22, for determination of fluid flow during drilling by measuring pressure.
152.27, for a determination of fluid flow by measuring pressure combined with sampling.
152.55, for a downhole fluid test.
700+, for fluid pressure measuring, per se.
760+, for stress or strain measuring or testing by stress or strain. 862+, for force measuring, per se.
SEE OR SEARCH CLASS
116, Signals and Indicators,
112+, for a pressure responsive mechanical alarm, per se, providing a humanly perceptible signal in response to a predetermined fluid flow, and subclass 266 for a pressure responsive mechanical indicator which provides a humanly perceptible signal in response to the presence or the absence of fluid flow.
166, Wells,
64, 66, and 113 for detail of a well combined with determining fluid flow by measuring or detecting pressure wherein more structure than is necessary to perfect the test is recited.
175, Boring or Penetrating the Earth,
40+, for a process or means of determining fluid flow by measuring or detecting pressure combined with more than a nominal recitation of an earth boring process or apparatus.
340, Communications: Electrical,
611, for an electrical indicator or an electrical alarm which provides a humanly perceptible signal in response to a predetermined fluid flow via monitoring pressure and subclass 626 for an electrical indicator or alarm, per se, which provides a humanly perceptible signal in response to the detection of a predetermined pressure.
364, Electrical Computers and Data Processing Systems, 420+, for the application of an electrical computer or data processing to the determination of fluid flow in a borehole by measuring pressure wherein significant electrical computer or data processing detail combined with only nominally recited sensor structure are claimed.
