In Response To Drilling Fluid Circulation Patents (Class 175/38)
  • Patent number: 9574440
    Abstract: A pulser driver assembly of a measurement-while-drilling tool that includes an improved flow switch is disclosed. The flow switch uses multiple accelerometers of different types that measure acceleration changes in a system. The accelerometer data is then filtered and processed by an onboard microcontroller. The filtered data is then passed to a fuzzy logic voting algorithm which systematically and robustly characterizes the signal, and identifies the flow state.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: February 21, 2017
    Assignee: REME, L.L.C.
    Inventors: Abraham Erdos, Kenneth Miller, Brad Munoz, Joshua Carter, James Mathieson
  • Patent number: 9567836
    Abstract: Systems and methods for optimizing drilling results may be based on, inter alia, (1) real-time data collected during drilling, (2) a transiently modeled cuttings distribution along the wellbore, and optionally (3) a theoretical change to one or more operational parameters. In some instances, methods may include drilling a wellbore penetrating a subterranean formation while circulating a drilling fluid; gathering real-time data about the drilling; calculating a cuttings distribution along the wellbore based on the real-time data using a transient model; calculating an equivalent circulating density profile along the wellbore based on (1) real-time data collected during drilling, (2) a transiently modeled cuttings distribution along the wellbore, and optionally (3) a theoretical change; and changing at least one operational parameter based on a comparison of the equivalent circulating density profile to a fracture gradient of the subterranean formation.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: February 14, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Dale E. Jamison, Robert L. Williams
  • Patent number: 9353586
    Abstract: According to one aspect, a digital display unit includes a microcontroller to process digital information received from one or more sensors, a display, and a switch in electrical communication with the microcontroller so that the microcontroller displays an output on the display that is specific to a type of sensor. The type of sensor may be selected from a position sensor, a pressure sensor, and a stroke counter. The digital display unit may be part of a choke control panel. The microcontroller and the display may be disposed in an enclosure, and an electrical power source may be disposed in the enclosure to supply electrical power to the microcontroller and the one or more sensors. A digital hydraulic choke position sensor assembly and a digital pressure sensor assembly are also described, one or both of which may be used in a system for drilling an oil or gas well.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: May 31, 2016
    Assignee: MATHENA, INC.
    Inventors: John Mathena, Bill Bennett
  • Patent number: 9297246
    Abstract: Apparatus and methods for removing sand or other particulate from well fracturing return water are disclosed. In a sand separator box, a barrier element divides the tank into an upper compartment and a lower compartment. Particulate-laden return water flows through a gas separator and then into the upper compartment of the box. The barrier element allows the water in the upper compartment to pass into the lower compartment while keeping the sand or particulate in the upper compartment. As water accumulates in the lower compartment, it is pumped out to storage tanks or back to the well for reuse.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: March 29, 2016
    Inventors: Cooper Smartt, Billy Smartt
  • Patent number: 9284799
    Abstract: A method for controlling entry of hydrocarbon into a wellbore from a subsurface formation includes determining whether hydrocarbon is entering the wellbore. Whether a rate of hydrocarbon entry into the wellbore is slowing is then determined Control of discharge from the wellbore is then switched from maintaining a selected wellbore pressure to controlling a rate of discharge of fluid from the wellbore to be substantially constant if the hydrocarbon entry rate is slowing. Control of discharge from the wellbore is returned to maintaining the selected wellbore pressure when the hydrocarbon stops entering the wellbore.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: March 15, 2016
    Assignee: Smith International, Inc.
    Inventors: Donald G. Reitsma, Ossama R. Sehsah, Yawan Couturier
  • Patent number: 9284822
    Abstract: A method for injecting treatment chemical into a well includes selecting times at which to operate a chemical dispenser to inject a selected amount of treatment chemical into a well. At each selected time whether a wellbore pump is operating is determined. If the pump is operating the selected amount of treatment chemical is dispensed into the well. If the pump is not operating, no chemical is dispensed and a counter is incremented. At each subsequent selected time, the determining whether the well pump is operating is repeated. When a subsequent selected time coincides with a time at which the well pump is determined to be operating, the chemical dispenser is operated to inject a product of the number in the counter plus one, and the selected amount of treatment chemical into the well.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: March 15, 2016
    Inventor: Robert N. Ayres
  • Patent number: 9279298
    Abstract: A well control method can include removing from a wellbore an undesired influx from a formation into the wellbore, determining a desired pressure profile in real time with a hydraulics model, and automatically operating a flow choking device while removing the undesired influx from the wellbore, thereby influencing an actual pressure profile toward the desired pressure profile. Another well control method can include removing out of a wellbore an undesired influx from a formation into the wellbore, determining a desired wellbore pressure with a hydraulics model, the desired wellbore pressure preventing further influx into the wellbore while removing the undesired influx from the wellbore, and automatically operating a flow choking device while removing the undesired influx from the wellbore, thereby influencing an actual wellbore pressure toward the desired wellbore pressure.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: March 8, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Derrick W. Lewis, Ronald J. Dirksen, David Michael Radley, James R. Lovorn, Fredrick D. Curtis
  • Patent number: 9234396
    Abstract: Systems and methods for monitoring and characterizing fluids in a subterranean formation are provided. In one embodiment, a method for monitoring fluids in a well bore penetrating a subterranean formation is provided, the method comprising: determining an actual buoyed hookload of an apparatus at least partially disposed in the well bore wherein a first set of fluids are present therein; comparing the actual buoyed hookload to a calculated buoyed hookload of the apparatus, wherein the calculated buoyed hookload is based in part on the unbuoyed hookload of the apparatus, and the properties of a second set of fluids that are assumed to be present in the well bore; and determining at least one property of the first set of fluids based in part on the comparison of the actual buoyed hookload to the calculated buoyed hookload.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: January 12, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Christopher Marland, Ian Mitchell, James Randolph Lovorn
  • Patent number: 9033064
    Abstract: A method of monitoring a well for unwanted formation fluid influx is disclosed. Measurements of well outflow are acquired during a period in which drilling operations are performed for the well. Occurrences of stagnant flow events during the period are determined. An outflow signature is generated from the well outflow measurements for each stagnant flow event. The outflow signatures are displayed sequentially in time of occurrence. Each outflow signature is analyzed for an anomaly.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 19, 2015
    Assignee: NATIONAL OILWELL, VARCO, L.P.
    Inventor: William Leo Koederitz
  • Patent number: 9010460
    Abstract: A method and a system for detecting or measuring influxes of formation water or brine into a drilling fluid being used to drill a borehole through an earth formation are described. The method and system comprising using an electrode based sensor system to determine changes in capacitance and/or conductance of the drilling fluid.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: April 21, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Gerald H. Meeten, Richard H. Mills
  • Patent number: 9010459
    Abstract: Air compressor systems, upgrade kits, computer readable medium, and methods for controlling an air compressor for improved performance. The methods may include receiving a working air requirement; determining an estimated air pressure of the air compressor to deliver the working air requirement; measuring a pressure of the air compressor; comparing the measured pressure with the calculated estimated air pressure; if the measured pressure of the air compressor is greater than the determined estimated air pressure by a predetermined greater amount, then decreasing an output control of the air compressor; and if the measured pressure of the air compressor is less than the calculated estimated air pressure by a predetermined lesser amount then increasing the output control of the air compressor. The air compressor may be controlled based on a measured pressure of delivered working air. An oil control system may shut off oil to parts of the air compressor.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: April 21, 2015
    Assignee: Sandvik Intellectual Property AB
    Inventors: Grant Andrew Field, Simo Tanner, Karl Ingmarsson
  • Publication number: 20150060140
    Abstract: The present invention recites a method, system and apparatus for steering a drill string, wherein an eccentric steering device is recited. The eccentric steering device may comprise an eccentric sleeve configured for mounting exterior to a portion of the drill string and permitting the drill string to rotate within the eccentric sleeve and a brake positioned to selectively cause rotation of the eccentric sleeve with the drill string. In one embodiment, the eccentric steering device may further comprise one or more bearings positioned between the eccentric sleeve and the drill string.
    Type: Application
    Filed: November 9, 2014
    Publication date: March 5, 2015
    Inventor: Geoff Downton
  • Patent number: 8955619
    Abstract: Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: February 17, 2015
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Frederick T. Tilton, David M. Haugen, Kevin W. Smith, David J. Brunnert, Thomas F. Bailey, Tom Fuller, Roy W. Rooyakkers, Ram K. Bansal, Graham Skinner
  • Publication number: 20140374157
    Abstract: A clean out sub for use in a drill string having a tool body with a cavity for passage of drilling fluid and annular fluid circulation ports extending through the tool body, a valve spool is positioned within the tool body cavity having a reduced diameter orifice, a compression spring is located within the tool body cavity adjacent the valve spool, wherein a drop in fluid pressure created by the orifice imparts a downhole force on the valve spool and at a predetermined force overcomes a set resistive force of the compression spring thereby moving the valve spool to open the annular fluid circulation ports.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 25, 2014
    Inventors: Eric John O'Neal, Rudolph Ernst Krueger, V, Andrew Alexander Trowbridge
  • Patent number: 8905157
    Abstract: A hydraulic fluid control system for controlling pressure fluid supplied to consumers (2, 3, 4) of a rock drilling machine, a regulating valve (6, 7, 8) for each for each consumer and fluid conduits between the regulating valves and the consumers, an electronically controlled auxiliary control unit (11) having an electrically controlled auxiliary valve (14) for connection to a fluid conduit, a sensor for sensing fluid parameter values and sending sensor signals to the auxiliary control unit as sensor input signal actual values, micro-controller (12) having at least one parameter sensor input signal entry (S1-S5, I1-I5) for receiving the sensor input signal actual values and a control signal exit (V1-V6) for signal control of an auxiliary valve, the processor (12) is being arranged to compare the actual and predetermined values and to emit control signals to an auxiliary valve in response to the comparison to adjust fluid flow.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: December 9, 2014
    Assignees: Atlas Copco Rock Drills AB, Atlas Copco Drilling Solutions LLC
    Inventors: Deyi Jiao, Eugene Cheng, Jonas Sinnerstad, Hans Gustavsson
  • Publication number: 20140345943
    Abstract: The present invention is directed to an automatic drill fluid measurement apparatus. More specifically, the present invention is directed to an apparatus which may automatically measure a weight or volume of a quantity of drill fluid and provide real-time feedback information regarding the drill fluid to a well operator. The automatic drill fluid measurement apparatus may further comprise a variety of sensors and other devices that are used in conjunction with a microprocessor to obtain useful information regarding drill fluid, such as mass flow meters, volume sensors and timers. Together, the apparatus, sensors and microprocessor may work together to control the opening and closing of valves of the measurement apparatus.
    Type: Application
    Filed: May 21, 2014
    Publication date: November 27, 2014
    Inventor: Jerry Alan Rayborn
  • Publication number: 20140345942
    Abstract: Diverting flow in a drilling fluid circulation system to regulate drilling fluid pressure. A pump of a drilling fluid pressure regulation system for a well bore can discharge drilling fluid through discharge piping at flow rate. A pressure control device has an inlet connected to the discharge piping and an outlet connected to bypass piping. A processor connected to the pump and the pressure control device can adjust the pressure control device to modify a pressure of the drilling fluid by at least partially opening the pressure control device and releasing drilling fluid into the bypass piping at a selected flow rate. The processor can modify the drilling fluid flow rate in the discharge piping based on the pressure represented by the pressure measurement signals and the selected flow rate in the bypass piping such that the target pressure parameter of the drilling fluid in the discharge piping is satisfied.
    Type: Application
    Filed: March 13, 2013
    Publication date: November 27, 2014
    Inventors: Nancy Suzan Davis, Cody Neal Butler
  • Publication number: 20140262510
    Abstract: A closed loop drilling fluids circulation system includes a first drilling fluid circulation system disposed at a first subterranean drill site. The first drilling fluid circulation system includes a supply tank for holding clean drilling fluid and a solids control device configured to separate solids from used drilling fluid. In addition, the system includes a central processing facility disposed at a location remote from the first drill site and configured to receive used drilling fluid from the solids control device and supply clean drilling fluid to the supply tank.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventors: Richard Beddoes, Ulric Fournier, Jeff Hall, Allan Peats
  • Patent number: 8746366
    Abstract: A downhole tool includes a downlinking system deployed in a downhole tool body having an internal through bore. The downlinking system includes a differential pressure transducer configured to measured a pressure difference between drilling fluid in the internal through bore and drilling fluid external to the tool (in the borehole annulus). The differential transducer is electrically connected with an electronic controller (deployed substantially anywhere in the drill string) that is configured to receive and decode pressure waveforms.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: June 10, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Ruchir S. Patwa, Pralay Das, Junichi Sugiura
  • Patent number: 8727037
    Abstract: A method and system to aid and/or train well control personnel by measuring the actual hydraulic delay and pressure attenuation of operator choke changes during well control operations or simulations. This provides the choke operator with an anticipated drillpipe pressure as soon as the choke is adjusted, accounting for hydraulic delay, pressure attenuation and prior choke adjustments that are currently travelling through the wellbore as well as reflections of the transient pressure waves against the pumps and choke. The technique that is described utilizes only three inputs, and works without knowledge of or inputting data such as well depth, pipe and hole geometry, mud properties, temperature, water depth, land, offshore platform or floating (subsea BOP's) drilling rigs. Further, the system can detect and warn the operator of potential problems based on the results of the real time analysis.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 20, 2014
    Inventor: David E. Mouton
  • Publication number: 20140090888
    Abstract: A drilling system includes a drill string extending through a BOP and a drilling fluid discharge coupling mounted to the BOP. In addition, the drilling system includes a drilling fluid control system configured to control a pressure or flow rate of a drilling fluid flowing through the discharge coupling. The drilling fluid control system includes a flow rate and pressure regulating device, a feedback controller system configured to operate the regulating device, and a first sensor configured to measure an actual pressure or flow rate of the drilling fluid flowing through the discharge coupling.
    Type: Application
    Filed: October 2, 2013
    Publication date: April 3, 2014
    Applicant: National Oilwell Varco, L.P.
    Inventors: Jerry E. Smith, Philip A. Strassle
  • Patent number: 8684109
    Abstract: A method of drilling a subterranean borehole comprising: a) pumping a drilling fluid down a drillstring (12), the drillstring (12) having a bit (14) at an end thereof, b) rotating the drillstring (12) about its longitudinal axis so that the bit forms a borehole (10) in the ground, the method further comprising the steps of: c) determining a desired drilling fluid flow rate range d) determining the desired upper and lower limits of the fluid pressure at the bottom of the wellbore (the BHP); e) determining the viscosity of drilling fluid which will maintain the BHP within the range set by the upper and lower BHP limits over the entire or the majority of the required drilling flow rate range; f) adjusting the composition of a drilling fluid to bring the drilling fluid to the viscosity calculated in step e above.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: April 1, 2014
    Assignee: Managed Pressure Operations Pte Ltd
    Inventors: Charles Orbell, Pat Savage
  • Publication number: 20140048331
    Abstract: A method of drilling a subsea wellbore includes drilling the subsea wellbore and, while drilling the subsea wellbore: measuring a flow rate of the drilling fluid injected into a tubular string; measuring a flow rate of returns; comparing the returns flow rate to the drilling fluid flow rate to detect a kick by a formation being drilled; and exerting backpressure on the returns using a first variable choke valve. The method further includes, in response to detecting the kick: closing a blowout preventer of a subsea pressure control assembly (PCA) against the tubular string; and diverting the flow of returns from the PCA, through a choke line having a second variable choke valve, and through the first variable choke valve.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 20, 2014
    Applicant: WEATHERFORD/LAMB, INC.
    Inventors: Said BOUTALBI, Michael Brian GRAYSON
  • Patent number: 8613331
    Abstract: A method of selectively actuating a downhole tool, wherein the downhole tool includes a tubular body with an axial borehole therethrough and at least one component, includes increasing a flow rate of a circulating fluid in the axial borehole of the downhole tool to reach a specified circulating fluid pressure, detecting an increased circulating fluid pressure in the borehole of the tool with at least one sensor, actuating a motor to operate a pump, and sending a fluid to operate a sliding sleeve. The method further includes operating the sleeve disposed in the axial borehole to open an actuation chamber port in response to the increased circulating fluid pressure in the borehole of the tool, thereby filling an actuation chamber with the drilling fluid, and moving the at least one expandable component radially outward.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: December 24, 2013
    Assignee: Smith International, Inc.
    Inventor: Praful C. Desai
  • Patent number: 8528660
    Abstract: A system and method for safely controlling a well being drilled or that has been drilled into a subterranean formation in which a conventional blow-out preventer operates to close the well bore to atmosphere upon the detection of a fluid influx event. Fluid pressures as well as fluid flow rates into and out of the well bore are measured and monitored to more accurately and confidently determine the fracture pressure and pore pressure of the formation and perform well control operations in response to a fluid influx event. During a suspected fluid influx event, one or more of the fluid flow and pressure measurements are used to confirm the fluid influx event and to safely regain well control by circulating the fluid influx out of the well through a choke line while maintaining the pressure inside the well between specified, selected limits, such as between the fracture and pore pressures.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: September 10, 2013
    Assignee: Safekick Americas LLC
    Inventor: Helio Santos
  • Patent number: 8522896
    Abstract: Processes and apparatus that continuously change the physical state and characteristics of drilling fluids at planned periodic intervals to consistently and correctly compensate for differing geological formation properties, wellbore characteristics, rate of penetration, solids removal efficiency, and other essential factors involved in the drilling process, comprising: initiating a system correction of a Minimum Base Required (“MBR”); and administering a dilutant to a drilling fluid according to the MBR. The system corrections may be performed recursively, adjusting the system's base dilutant and chemical product additions according to MBR. The drilling fluid consistency produced is based upon several drilling-rig specific parameters.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: September 3, 2013
    Inventor: Michael V. Rowden
  • Patent number: 8517692
    Abstract: A method of controlling pressure in a mud pump system includes generating a pressure limiting factor output using a pressure feedback input and a motor speed input to calculate a fluid conductance estimate, maintaining the pressure limiting factor output at a maximum value based on a pressure set-point, continuously updating a normal fluid conductance value based on the fluid conductance estimate while the pressure limiting factor output remains at the maximum value, freezing the normal fluid conductance value, if the pressure limiting factor output is less than the maximum value, calculating a change in fluid conductance based on the normal fluid conductance value and the fluid conductance estimate, generating at least one adaptive gain based on the change in fluid conductance, and controlling a motor speed of a pump in the mud pump system based on the at least one adaptive gain.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: August 27, 2013
    Assignee: Omron Oilfield & Marine, Inc.
    Inventors: Fergus Hopwood, Arun Natarajan
  • Patent number: 8457898
    Abstract: An illustrative embodiment of a method is disclosed for assessing image quality of a down hole formation image, the method comprising collecting acquisition system data from a plurality of sensors down hole; applying a set of rules to the acquisition system data to obtain an acquisition quality indicator; and presenting the acquisition quality indicator at a surface location. A system is disclosed for performing the method.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: June 4, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Andreas Hartmann, Oleg N. Akimov, Ansgar Baule, Christian Fulda
  • Patent number: 8408331
    Abstract: A downhole tool includes a downlinking system deployed in a downhole tool body having an internal through bore. The downlinking system includes a differential pressure transducer configured to measured a pressure difference between drilling fluid in the internal through bore and drilling fluid external to the tool (in the borehole annulus). The differential transducer is electrically connected with an electronic controller (deployed substantially anywhere in the drill string) that is configured to receive and decode pressure waveforms.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: April 2, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Ruchir S. Patwa, Pralay Das, Junichi Sugiura
  • Publication number: 20130048379
    Abstract: An apparatus, method, and system described for generating pressure pulses in drilling fluid utilizing a flow throttling device which includes a controllable pulser operating sequentially within a downhole assembly within a drill string of a drill pipe. The system includes drilling fluid, fluid flow, and fluid drilling pump which when combined creates fluid flow into a bore pipe annulus within the downhole assembly creating a base line bore pipe pressure wherein bore pipe pressure is sensed via a sensor and information is sent to a Digital Signal Processor (DSP) that interprets the information. The DSP also receives information from an annulus pressure sensor that senses drilling fluid pressure as it returns to the pump. The DSP recognizes pressure variation input from the annulus pressure sensor and bore pipe pressure sensor and detects pressure variation providing signals as data information to the DSP, determining required action to adjust pulser operation.
    Type: Application
    Filed: August 21, 2012
    Publication date: February 28, 2013
    Applicant: Teledrill, Inc.
    Inventors: Robert MacDonald, Gabor Vecseri, Benjamin Jennings
  • Patent number: 8327954
    Abstract: A tubular body with an axial bore includes an upper connection attached to a drillstring and a lower connection with a drill bit disposed thereon. Primary and backup cutter blocks are coupled to the tubular body and configured to selectively expand radially therefrom. An activation system within the tubular body is configured to selectively expand and collapse the primary and backup cutter blocks in response to changes in weight applied to the primary and backup cutter blocks.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: December 11, 2012
    Assignee: Smith International, Inc.
    Inventor: Praful C. Desai
  • Patent number: 8322439
    Abstract: An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a drilling riser up or down. The arrangement comprises a high pressure drilling riser and a surface BOP at the upper end of the drilling riser. The surface BOP has a gas bleeding outlet. The riser also comprises a BOP, with a by-pass line. The drilling riser has an outlet at a depth below the water surface, and the outlet is connected to a pumping system with a flow return conduit running back to a drilling vessel/platform.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: December 4, 2012
    Assignee: Ocean Riser Systems AS
    Inventor: Borre Fossli
  • Patent number: 8307913
    Abstract: A method to control borehole fluid flow includes detecting a drilling condition and operating at least one valve in the drill string to place an exterior of the drill string in fluid communication with an interior of the drill string in response to detecting the drilling condition.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: November 13, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Lee F. Dolman, Benjamin P. Jeffryes, Ashley B. Johnson, Brian Clark, John A. McCullagh
  • Publication number: 20120273271
    Abstract: A measurement-while-drilling mud pulser and a method for controlling a measurement-while-drilling mud pulser. The mud pulser includes a brushless DC motor that hydraulically controls a main restrictor valve that the mud pulser uses to generate mud pulses. Back EMF signals generated in the stator windings of the brushless DC motor are monitored and are used as the basis for commutating the brushless DC motor. The phase transitions in the back EMF signals can be used in governing stator energizations of the brushless DC motor to thereby govern its rotation. Relying on back EMF signals for commutation allows commutation to be performed without Hall Effect or other kinds of sensors, which can thereby reduce cost of the mud pulser and further increase reliability of the mud pulser by decreasing the number of high pressure sealings needed due to wires from Hall effect sensors, which are prone to develop leaks.
    Type: Application
    Filed: April 20, 2012
    Publication date: November 1, 2012
    Inventor: William Stuart-Bruges
  • Patent number: 8256532
    Abstract: Embodiments of systems, program product, and methods for controlling drilling fluid pressures are provided. These embodiments, for example, can provide dynamic density control with highly adaptive, real-time, process-control and are scalable to any rig, large or small, on land or water. Combined static and dynamic stresses and displacements can be determined continuously at strategic locations in and around the wellbore of a well so that insitu and operational induced pressure window limitations at specific weak-points or other locations of interest are controlled.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 4, 2012
    Assignee: Board of Regents, The University of Texas System
    Inventor: Kenneth E. Gray
  • Patent number: 8251144
    Abstract: A downhole tool comprises a body defining a fluid inlet and two or more fluid outlets. A valve arrangement cycles the proportion of fluid directed from the inlet to each of the outlets. One of the outlets may be associated with a fluid pressure responsive device, such as a cleaning blade.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: August 28, 2012
    Assignee: Andergauge Limited
    Inventor: Alastair Henry Walter Macfarlane
  • Patent number: 8240398
    Abstract: A method of controlling pressure in a wellbore can include determining a real time wellbore pressure PwbRT1 at a pressure sensor in the wellbore, calculating hydrostatic pressure Ph1 at the pressure sensor, determining a real time annulus pressure PaRT, calculating friction pressure Pf due at least to circulation of the fluid through the wellbore and depth in the wellbore, calculating a friction pressure correction factor CFPf1 equal to (PwbRT1?Ph1?PaRT)/Pf, and controlling operation of a pressure control device, based on the friction pressure correction factor CFPf1. The method can further include determining a desired wellbore pressure PwbD1 at the pressure sensor, calculating an annulus pressure setpoint PaSP1 equal to PwbD1?Ph1?(Pf*CFPf1), and adjusting the pressure control device as needed to maintain PaRT equal to PaSP1.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: August 14, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James R. Lovorn, Saad Saeed, Nancy Davis
  • Patent number: 8240397
    Abstract: The method of controlling the load on a drill bit drilling a hole by providing differential pressure across a seal area on a drilling assembly to increase the bit load and providing a relief valve from the annular area above the seal to the bore returning fluid to the surface to limit the maximum differential pressure to limit the maximum load allowed.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: August 14, 2012
    Inventors: James R. Crawford, Benton Frederick Baugh
  • Publication number: 20120145456
    Abstract: Processes and apparatus that continuously change the physical state and characteristics of drilling fluids at planned periodic intervals to consistently and correctly compensate for differing geological formation properties, wellbore characteristics, rate of penetration, solids removal efficiency, and other essential factors involved in the drilling process. An embodiment of a process of the current invention comprises: initiating a system correction of a Minimum Base Required (“MBR”); and administering a dilutant to a drilling fluid according to the MBR. The system corrections may be performed recursively, adjusting the system's base dilutant and chemical product additions according to MBR. The drilling fluid consistency produced is based upon several drilling-rig specific parameters.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 14, 2012
    Inventor: Michael V. Rowden
  • Patent number: 8196678
    Abstract: A method of downlinking to a downhole tool located in a borehole is provided. The downhole tool detects transitions in the flow velocity of fluid circulating in the borehole at the downhole tool. To provide for the detection of the transitions fluid is pumped into the drillstring so that it circulates in the borehole at the downhole tool and the the pumping rate of fluid into the drillstring is either increased to a rate which overshoots a steady state pumping rate needed to produce a transition or is decreased to a rate which undershoots a steady state pumping rate needed to produce a transition.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: June 12, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Benjamin Jeffryes
  • Patent number: 8146681
    Abstract: A drilling tool includes a hydraulically driven device (21) for advancing a drilling head (2) in a bore (5), and a flow limiter (30) arranged in a hydraulic conduit (25) of the advancing device (21) for adjusting an advancing speed of the drilling head (2) in the bore (5), with the flow limiter (30) having a pressure-actuated adjusting member (38) for adjusting flow of a hydraulic fluid in the hydraulic conduit means (25) in accordance with a flow volume of a rinsing fluid (7) for rinsing the bore.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: April 3, 2012
    Assignee: Hilti Aktiengesellschaft
    Inventors: Kay Heemann, Uwe Bohn, Wolfgang Ludwig
  • Patent number: 8132630
    Abstract: A system for reverse circulation in a wellbore includes equipment for supplying drilling fluid into the wellbore bit via at least an annulus of the wellbore and returning the drilling fluid to a surface location via at least a bore of a wellbore tubular. The system also includes devices for controlling the annulus pressure associated with this reverse circulation. An active pressure differential device may increase the pressure wellbore annulus to at least partially offset a circulating pressure loss. Alternatively, the system may include devices for decreasing the pressure in the annulus of the wellbore.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: March 13, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Sven Krueger, Volker Krueger, Jens Bruns, Roger Fincher, Larry Watkins, Peter Aronstam, Peter Fontana
  • Publication number: 20120048620
    Abstract: A method of controlling pressure in a mud pump system includes generating a pressure limiting factor output using a pressure feedback input and a motor speed input to calculate a fluid conductance estimate, maintaining the pressure limiting factor output at a maximum value based on a pressure set-point, continuously updating a normal fluid conductance value based on the fluid conductance estimate while the pressure limiting factor output remains at the maximum value, freezing the normal fluid conductance value, if the pressure limiting factor output is less than the maximum value, calculating a change in fluid conductance based on the normal fluid conductance value and the fluid conductance estimate, generating at least one adaptive gain based on the change in fluid conductance, and controlling a motor speed of a pump in the mud pump system based on the at least one adaptive gain.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 1, 2012
    Applicant: OMRON OILFIELD & MARINE, INC.
    Inventors: Fergus Hopwood, Arun Natarajan
  • Patent number: 8073623
    Abstract: An illustrative embodiment of a method is disclosed for assessing image quality of a down hole formation image, the method comprising collecting acquisition system data from a plurality of sensors down hole; applying a set of rules to the acquisition system data to obtain an acquisition quality indicator; and presenting the acquisition quality indicator at a surface location. A system is disclosed for performing the method.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: December 6, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Andreas Hartmann, Oleg N. Akimov, Ansgar Baule, Christian Fulda
  • Patent number: 7984770
    Abstract: A method for determining formation integrity during drilling of a wellbore includes determining an annulus fluid pressure in a wellbore during drilling thereof. The annulus pressure is adjusted by a predetermined amount. Flow rate of drilling fluid into the wellbore is compared to drilling fluid flow rate out of the wellbore. At least one of a formation pore pressure and a formation fracture pressure is determined from the annulus pressure when the compared flow rates differ by a selected amount. The method alternatively to determining pore and/or fracture pressure includes determining a response of the wellbore to the adjusted fluid pressure and determining the optimum annulus fluid pressure from the wellbore response.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: July 26, 2011
    Assignee: At-Balance Americas, LLC
    Inventor: Ossama Ramzi Sehsah
  • Patent number: 7980326
    Abstract: A method and system of subterranean excavating that estimates a buoyancy force applied to a downhole excavating system from drilling fluid. The estimated buoyancy force is used to derive a true weight on bit (WOB) at the borehole bottom. The derived realized WOB is compared to a target WOB to obtain a change in WOB. Based on the change in WOB, the excavating system is adjusted so the realized WOB approximates the target WOB. The excavating system adjustment includes applying a compensating force to the string. Compensating forces can be produced by manipulating a block assembly or deploying a thruster device in the string.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: July 19, 2011
    Assignee: PDTI Holdings, LLC
    Inventors: Gordon A. Tibbitts, Greg Galloway, Adrian Vuyk, Jr., Thomas Alan Carlson
  • Patent number: 7967082
    Abstract: A tubular downhole tool string component having a sidewall with a fluid passageway formed therein between a first end and second end, and a valve mechanism disposed within the fluid passageway adapted to substantially cyclically build-up and release pressure within the fluid passageway such that a pressure build-up results in radial expansion of at least a portion of the sidewall and wherein a pressure release results in a radial contraction of the portion of the sidewall. The valve mechanism disposed within the fluid passageway comprises a spring. Radial expansion and contraction of the portion of the sidewall varies a weight loaded to a drill bit disposed at a drilling end of the drill string.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: June 28, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, John Bailey
  • Patent number: 7958948
    Abstract: A system and method is described for use and return of drilling fluid/cuttings from a well, which is drilled on the ocean floor, in connection with offshore related oil production and gas production, where, from a drilling rig or drilling vessel (10), a drill stem (12) runs down into the bore hole and where a blowout preventer (BOP) is placed on said well, without mounting a riser between the rig or the vessel and said blowout preventer. A sealing and pressure-regulating device (16) is arranged on the blowout preventer (14) arranged to regulate the level of the drilling fluid, and thus the outlet pressure of the drilling fluid in said sealing and pressure-regulating device, and a pump module (18) is set up at a suitable distance adjacent said sealing and pressure-regulating device, where the pump module is arranged to pump said drilling fluid up to the ocean surface via an external return pipe.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: June 14, 2011
    Assignee: AGR Subsea AS
    Inventor: Roger Stave
  • Patent number: 7950472
    Abstract: A method for detecting a change in a wellbore fluid includes estimating at least two pressure differences in the wellbore fluid and estimating a change in a density of the fluid using the at least two pressure differences. The density change may be estimated by the equation, ??=(?Pbefore—influx??Pafter—influx)/(g×?TVD), wherein ?P is a fluid pressure difference between two points along the wellbore, ? is a mean value of density of the fluid between the two points, g is gravity and ?TVD is a vertical distance between the two points. The method may include estimating a density change using an estimated inclination of the wellbore. An apparatus for estimating density changes includes at least two axially spaced apart pressure sensors. The sensor positions may be switched to estimate a correction term to reduce a relative offset between the two pressure sensors.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: May 31, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Rocco DiFoggio, Jinsong Zhao
  • Patent number: RE43199
    Abstract: An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a drilling riser up or down. The arrangement comprises a high pressure drilling riser and a surface BOP at the upper end of the drilling riser. The surface BOP havs a gas bleeding outlet. The riser also comprises a BOP, with a by-pass line. The drilling riser has an outlet at a depth below the water surface, and the outlet is connected to a pumping system with a flow return conduit running back to a drilling vessel/platform.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: February 21, 2012
    Assignee: Ocean Rider Systems AS
    Inventor: Borre Fossli