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Class Information
Number: 175/48
Name: Boring or penetrating the earth > With signaling, indicating, testing or measuring > Measuring or indicating drilling fluid (1) pressure, or (2) rate of flow
Description: Subject matter relating to a drilling fluid system forming a part of the boring means and a step or means to (1) measure or indicate the pressure of the drilling fluid or (2) measure or indicate the rate of flow of said drilling fluid at a specified location in said system.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8689884 Mud pulse telemetry system Apr. 8, 2014
8684109 Drilling method for drilling a subterranean borehole Apr. 1, 2014
8657034 Method of drilling a subterranean borehole Feb. 25, 2014
8613331 On demand actuation system Dec. 24, 2013
8567525 Method for determining fluid control events in a borehole using a dynamic annular pressure control system Oct. 29, 2013
8544564 Wireless communications in a drilling operations environment Oct. 1, 2013
8517692 Pressure limiting controller Aug. 27, 2013
8490719 Method and apparatus for controlling bottom hole pressure in a subterranean formation during rig pump operation Jul. 23, 2013
8467268 Pressure release encoding system for communicating downhole information through a wellbore to a surface location Jun. 18, 2013
8457898 System and method for real-time quality control for downhole logging devices Jun. 4, 2013
8453760 Method and apparatus for controlling bottomhole temperature in deviated wells Jun. 4, 2013
8434356 Fluid density from downhole optical measurements May. 7, 2013
8408331 Downhole downlinking system employing a differential pressure transducer Apr. 2, 2013
8360170 Method of drilling a subterranean borehole Jan. 29, 2013
8347983 Drilling with a high pressure rotating control device Jan. 8, 2013
8267197 Apparatus and methods for controlling bottomhole assembly temperature during a pause in drilling boreholes Sep. 18, 2012
8256532 System, program products, and methods for controlling drilling fluid parameters Sep. 4, 2012
8251160 Measurement while drilling apparatus and method of using the same Aug. 28, 2012
8240397 Method to control bit load Aug. 14, 2012
8240398 Annulus pressure setpoint correction using real time pressure while drilling measurements Aug. 14, 2012
8235143 Methods and devices for determination of gas-kick parametrs and prevention of well explosion Aug. 7, 2012
8232892 Method and system for operating a well service rig Jul. 31, 2012
8203908 Intelligent efficient servo-actuator for a downhole pulser Jun. 19, 2012
8151904 Method for improved well control with a downhole device Apr. 10, 2012
8096370 Apparatus and method for producing soil elements underground Jan. 17, 2012
8073623 System and method for real-time quality control for downhole logging devices Dec. 6, 2011
8042572 Controllable pressure-reducing valve and device for the generation of pressure change signals Oct. 25, 2011
8033335 Offshore universal riser system Oct. 11, 2011
7984770 Method for determining formation integrity and optimum drilling parameters during drilling Jul. 26, 2011
7958948 Method and system for return of drilling fluid Jun. 14, 2011
7950474 Dual stripper rubber cartridge with leak detection May. 31, 2011
7950472 Downhole local mud weight measurement near bit May. 31, 2011
7950451 Annulus mud flow rate measurement while drilling and use thereof to detect well dysfunction May. 31, 2011
7913774 Modular connector and method Mar. 29, 2011
7908034 System, program products, and methods for controlling drilling fluid parameters Mar. 15, 2011
7881155 Pressure release encoding system for communicating downhole information through a wellbore to a surface location Feb. 1, 2011
7857075 Wellbore drilling system Dec. 28, 2010
7844405 Static and ultrasonic methods for measuring compressibility and density of small particles Nov. 30, 2010
7828083 Method of controlling operation of rock drilling rig, and rock drilling rig Nov. 9, 2010
7828080 Distributed intelligence for enhanced monitoring and control of oilfield processes Nov. 9, 2010
7806202 System and method for reservoir characterization using underbalanced drilling data Oct. 5, 2010
7806203 Active controlled bottomhole pressure system and method with continuous circulation system Oct. 5, 2010
7808859 Oscillating shear valve for mud pulse telemetry Oct. 5, 2010
7802635 Dual stripper rubber cartridge with leak detection Sep. 28, 2010
7775299 Method and apparatus for programmable pressure drilling and programmable gradient drilling, and completion Aug. 17, 2010
7770663 Apparatus for making quality control measurements while drilling Aug. 10, 2010
7735579 Measurement while drilling apparatus and method of using the same Jun. 15, 2010
7730968 Apparatus for wellbore communication Jun. 8, 2010
7721822 Control systems and methods for real-time downhole pressure management (ECD control) May. 25, 2010
7677332 Method and apparatus for managing variable density drilling mud Mar. 16, 2010

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