Of Fluid Pressure Below Ground Patents (Class 175/25)
  • Patent number: 9725974
    Abstract: A well drilling system can include a hydraulics model which determines a modeled fluid friction pressure and a calibration factor applied to the modeled friction pressure, and a flow control device which is automatically controlled in response to a change in the calibration factor. A well drilling method can include drilling a wellbore, a fluid circulating through the wellbore during the drilling, determining a calibration factor which is applied to a modeled fluid friction pressure, and controlling the drilling based at least in part on a change in the calibration factor.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: August 8, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: James R. Lovorn
  • Patent number: 9708898
    Abstract: An automated system for detecting fluid influx into a wellbore during the transient conditions that occur after pumps stopped. The system comprises at least one sensor normally employed on a drilling rig for measuring at least one parameter, and a processor for receiving a signal indicative of the parameter from the sensor. The processor is programmed to analyze a plurality of values of the parameter measured during a plurality of previous events so as to generate a predetermined threshold value, compare the received signal to the predetermined threshold value, and provide an output signal indicative of fluid influx when the received signal is beyond the predetermined threshold value.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: July 18, 2017
    Assignee: CoVar Applied Technologies, Inc.
    Inventors: George Martin Milner, Brian Anstey Tarr
  • Patent number: 9506305
    Abstract: A method of drilling a subterranean wellbore using a drill string including the steps of estimating or determining a reduced static density of a drilling fluid based on the equivalent circulating density of the drilling fluid in a section of the wellbore, providing a drilling fluid having substantially that reduced static density, introducing the drilling fluid having said reduced static density into the wellbore, and removing the drilling fluid from the wellbore via a return line.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: November 29, 2016
    Assignee: MANAGED PRESSURE OPERATIONS PTE. LTD.
    Inventors: Christian Leuchtenberg, Pat Savage
  • Patent number: 9470070
    Abstract: A method, including: performing dual-side depressurization on a hydrate blockage in a subsea flow line, wherein dual-side depressurization includes, reducing pressure on a topside of the hydrate blockage in the subsea flow line by removing liquid from within a subsea riser with a bubble pump that has a first end in fluid communication with the liquid within the subsea riser, reducing pressure on a backside of the hydrate blockage, and concurrently controlling the reduction in pressure on the topside of the hydrate blockage and the backside of the hydrate blockage.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: October 18, 2016
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Brendon L. Keinath, Jason W. Lachance
  • Patent number: 9470042
    Abstract: A drilling assembly positionable in a well bore includes a turbine motor couplable to a drill string and a harmonic drive transmission coupled to the turbine motor. The harmonic drive transmission includes a circular spline, a wave generator, a flexspline, and a sealing subsystem. The sealing subsystem defines a substantially sealed volume containing the circular spline, wave generator, and flexspline, and isolates the circular spline, wave generator, and flexspline from drilling fluid exiting the turbine motor and flowing through the harmonic drive transmission.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: October 18, 2016
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: John Kenneth Snyder, Richard Thomas Hay
  • Patent number: 9429009
    Abstract: A method and system for autonomously enhancing the performance of rig operations at a rig-site, including subterranean operations at a rig-site. The system may include an integrated control system, wherein the integrated control system monitors one or more parameters of sensor units of the rig operations, and a central computer that can communicate with sensor units reporting the health and operational status of the rig operations. The system may further be upgraded by a package of sensors attached to the various tools that allow the central computer an overall synchronized view of the rig operations.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: August 30, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Marty Paulk, Loyd Eddie East, Jr., Ronald Johannes Dirksen
  • Patent number: 9416605
    Abstract: The present invention relates to a method for determining a variation of a flushing medium flow at a rock drilling apparatus, where a compressor (8;301) discharges a flow of pressurized gas, where said gas flow at least partially is used as flushing medium during drilling with a tool (3), wherein, during drilling, said flushing medium is led to said tool (3) for flushing away drilling remnants. The method includes to determine a rate of a pressure variation of said flushing medium, and generating a signal when said determined rate exceeds a first value. The invention also relates to a system and a rock drilling apparatus.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 16, 2016
    Assignee: Atlas Copco Rock Drills AB
    Inventor: Erik Aldén
  • Patent number: 9388681
    Abstract: Reducing or eliminating stick-slip and vibrations downhole may include controlling top drive torque in order to adjust drill bit angular speed in a manner that prevents, eliminates, or reduces stick-slip and vibration. Control methods and systems may include solving one or more optimization problems including an objective function. The objective function may be subject to conditions including a physical model of the drilling system. The objective function may be minimized without reference to a model, but instead by reference to estimated stick-slip frequency based upon a drill bit angular speed profile. In addition, actual downhole measurements for use in control methods and systems, such as drill bit angular speed, may be estimated using an observer.
    Type: Grant
    Filed: August 17, 2013
    Date of Patent: July 12, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jason Dykstra, Zhijie Sun
  • Patent number: 9297250
    Abstract: In some aspects, an injection treatment of a subterranean region is controlled based on a target net treating pressure. A measure of fluid pressure acting on a subterranean region during an injection treatment is received. The measure of fluid pressure is compared against a target net treating pressure for fluid acting on the subterranean region during the injection treatment. The target net treating pressure is associated with a target fracture growth orientation. The injection treatment is modified based on a result of the comparison.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 29, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ronald Glen Dusterhoft, David Blair Allison
  • Patent number: 9239830
    Abstract: The various embodiments herein provide a method and system for building a relationship hierarchy from big data. The method comprises extracting a plurality of relationships defined between entities from a big data, building relationship recognition models adapted to identify different forms of generic relationships, resolving the relationships by grouping the similar relationships together and separating the relationships which are syntactically and semantically dissimilar and reconciling the resolved relationships to build the relationship hierarchy. The relationship hierarchy comprises groups and subgroups of relationships created based on generic relationship similarity based on a contextual aspect and a specialization aspect using a Language and Domain model. The method of extraction of plurality of relationships from the unstructured data is a self-learning process which uses open information extraction techniques for learning new relationships.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: January 19, 2016
    Assignee: XURMO TECHNOLOGIES PVT. LTD.
    Inventors: Sridhar Gopalakrishnan, Sujatha Raviprasad Upadhyaya
  • Patent number: 9228393
    Abstract: Drilling laterals in shale formations. At least some of the illustrative embodiments are methods including: drilling a deviated borehole through a shale formation with a drill string comprising a drill bit; logging the shale formation with a logging tool disposed within the drill string; estimating, in real time with the drilling, fracture potential of a portion of the shale formation near the drill bit, the estimation of fracture potential based on information acquired by the logging tool; and controlling drilling direction based on the fracture potential.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: January 5, 2016
    Assignee: Landmark Graphics Corporation
    Inventors: Richard B. Logan, Stephen R. Ingram, Martin D. Paulk, Hamayun Z. Raja
  • Patent number: 9194194
    Abstract: An apparatus and method is provided for controlling the coordination of pressure control equipment such as a BOP stack and/or a snubbing unit and/or other pressure control equipment in a well completion system while moving pipes into or out of a wellbore under pressure. In one embodiment, a moveable clamp and a fixed clamp are provided. The moveable clamp is clamped to a pipe while the fixed clamp is open so that the moveable clamp either moves the pipe into the well or pulls it out of the well. The fixed clamp is then clamped to the pipe. The moveable clamp is unclamped and moves to another position whereupon the process is repeated. A computer controls operation of the moveable clamp, fixed clamp, seals, and pipe moving equipment which moves pipe into and out of the mast.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: November 24, 2015
    Assignee: SUPERIOR ENERGY SERVICES-NORTH AMERICA SERVICES, INC.
    Inventor: Mark J. Flusche
  • Patent number: 9175531
    Abstract: A method of identifying a self-sustained influx of formation fluids into a wellbore includes the steps of closing an annular shut-off device and diverting an annular return flow from the wellbore through a first flow rate measurement device, measuring a flow rate of said annular return flow, measuring an inlet flow rate of fluids entering the well through a second flow rate measurement device in a fluid injection line, and identifying a self-sustained influx of formation fluids if a non-decreasing measured annular return flow rate is greater than said measured inlet flow rate.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: November 3, 2015
    Assignee: Safekick Ltd.
    Inventors: Helio Santos, Paul L. Sonnemann
  • Patent number: 9068419
    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: Grant
    Filed: March 13, 2013
    Date of Patent: June 30, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Nancy Suzan Davis, Cody Neal Butler
  • Patent number: 9057236
    Abstract: A method for operating a dual drill string disposed in a wellbore, the string having a shutoff valve for at least a fluid return drill string therein proximate a bottom end thereof includes pumping fluid into the fluid return string such that a pressure therein is substantially equal to a fluid pressure in the wellbore. Circulation of fluid in the wellbore is initiated by pumping fluid into a fluid supply string of the dual drill string such that the shutoff valve on the fluid return string opens to enable the fluid leaving the wellbore to enter the fluid return string.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: June 16, 2015
    Assignee: Reelwell, A.S.
    Inventors: Tore Høgset, Harald Syse
  • Patent number: 9051803
    Abstract: A control apparatus for use in controlling the fluid pressure in a borehole during drilling of the borehole, the apparatus including an inlet suitable for connection to a pump, a main outlet suitable for connection to a drill pipe, and an overflow outlet suitable for connection to a fluid reservoir, the inlet being connected to the main outlet by a main flow conduit, and the overflow outlet being connected to the main flow conduit by means of an overflow conduit, wherein the overflow conduit is provided with a pressure regulator by means of which the pressure of fluid in the main flow conduit may be maintained at or around a predetermined pressure value.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: June 9, 2015
    Assignee: Managed Pressure Operations PTE LTD
    Inventor: Christian Leuchtenberg
  • Publication number: 20150144400
    Abstract: A pressure containment device for containing pressure in an annulus around a tubular body, the device comprising a housing having an axis and a passage extending generally parallel to the housing axis, and a seal assembly comprising a seal located in the housing to surround and enter into sealing engagement with a tubular body extending along the passage, wherein the housing is provided with a returns outlet port, an injection port, and an overflow outlet port, all of which extend through the housing from the exterior of the housing into the passage, the injection port being located between the returns outlet port and a first end of the seal, and the overflow outlet port being located adjacent a second, opposite end of the seal, and thus being separated from the injection port by the seal.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 28, 2015
    Applicant: Managed Pressure Operations Pte. Ltd.
    Inventors: Christian LEUCHTENBERG, George MICHAUD
  • 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
  • Publication number: 20150129306
    Abstract: A method for optimizing drilling includes initializing values of a plurality of drilling operating parameters and drilling response parameters. In a computer, an initial relationship between the plurality of drilling operating parameters and drilling response parameters is determined. A drilling unit to drill a wellbore through subsurface formations. The drilling operating parameters and drilling response parameters are measured during drilling and entered into the computer. A range of values and an optimum value for at least one of the drilling response parameters and at least one of the drilling response parameters is determined in the computer. A display of the at least one of the plurality of drilling operating parameters and the at least one of the drilling response parameters is generated by the computer.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 14, 2015
    Inventors: Chunling Gu Coffman, Rustam Isangulov, Oney Erge, John Christian Luppens, Ginger Hildebrand, Wayne Kotovsky
  • Patent number: 9019118
    Abstract: A drilling control system monitors and compares drilling and completion operation sensor values and autonomously acts in response to conditions such as a kick or surge. Sensors in various combinations may monitor return fluid flow rate, fluid inflow rate, wellhead bore pressure, temperature of returning fluid, torque, rate of penetration and string weight change. The control system has corresponding control logic to monitor, warn and act based on the sensor inputs. The actions may include the warning of support personnel, closing an annular blowout preventer, shearing drill pipe using a ram shear, pumping heavier fluid down choke and kill lines, disconnecting the riser or various other actions.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 28, 2015
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Eric L. Milne, Joseph P. Ebenezer
  • Publication number: 20150107898
    Abstract: A method of drilling a subterranean wellbore using a drill string comprising the steps of: a. injecting a drilling fluid into the well bore via the drill string and removing said drilling fluid from an annular space around the drill string (the annulus) via an annulus return line, b. oscillating the pressure of the fluid in the annulus, c. determining the wellbore storage volume and wellbore storage coefficient for each fluid pressure oscillation, d. using the wellbore storage volume and wellbore storage coefficient to determine the proportion by volume of gas and proportion by volume of liquid in the annulus during that pressure oscillation.
    Type: Application
    Filed: May 3, 2013
    Publication date: April 23, 2015
    Applicant: MANAGED PRESSURE OPERATIONS PTE. LTD.
    Inventor: Christian Leuchtenberg
  • 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
  • Patent number: 8967244
    Abstract: A system is provided for communicating within a borehole using controlled vibrations. A movement mechanism uses mechanical energy provided by a mechanical energy source to enable translational movement of a first surface relative to a second surface to allow the first surface to repeatedly impact the second surface to produce a plurality of vibration beats. The vibration beats will occur whenever the mechanical energy is provided by the mechanical energy source at one of at least three impact levels. A vibration control mechanism selectively controls an amplitude of the plurality of vibration beats to encode information therein. The amplitude of a vibration beat is selectively controlled by regulating the impact of the first surface and the second surface to one of the at least three impact levels.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: March 3, 2015
    Assignee: Hunt Advanced Drilling Technologies, LLC
    Inventor: Todd W. Benson
  • 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: 20150041213
    Abstract: Injection of gas into a managed pressure drilling system to provide for operation of the drilling system in a downhole pressure window defined by the pore pressure of a formation being drilled and a fracture pressure of the formation. Gas injection being controlled so as to produce the desired downhole pressure without causing large oscillations in borehole pressure.
    Type: Application
    Filed: May 25, 2012
    Publication date: February 12, 2015
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Benjamin P. Jeffryes, Ashley Bernard Johnson
  • Patent number: 8950512
    Abstract: A method and apparatus for estimating the instantaneous rotational speed of a bottom hole assembly at the lower end of a drill string. In one embodiment, a method includes driving the drill string by a drilling mechanism at the upper end of the drill string. A fundamental frequency of stick-slip oscillations suffered by the drill string is estimated. Variations in a drive torque of the drilling mechanism are determined. Known torsional compliance of the drill string is combined with the variations in the drive torque. An output signal representing the instantaneous rotational speed is provided.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: February 10, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventors: Pal Jacob Nessjoen, Age Kyllingstad
  • Publication number: 20140352951
    Abstract: Back pressure control devices used to control fluid pressure in a wellbore require various utilities for operation, such as an air supply. Apparatus disclosed herein provide for the continued operation of one or more back pressure control devices when supply of utilities for operation of the back pressure control devices are intentionally or unintentionally interrupted.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 4, 2014
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Roger Suter, David Molley
  • Publication number: 20140345941
    Abstract: Stable back pressure control devices are used to control fluid pressure in a wellbore to provide constant downhole pressure. Back pressure may be estimated from a correlation between the speed of a mud pump and the pressure exerted from the pump. Drilling plans disclosed herein provide for the continued operation of one or more back pressure control devices for providing constant bottomhole pressure when casing connections are being made.
    Type: Application
    Filed: December 14, 2012
    Publication date: November 27, 2014
    Inventors: Roger Sutter, David Molley
  • Patent number: 8833488
    Abstract: A method of controlling standpipe pressure in a drilling operation can include comparing a measured standpipe pressure to a desired standpipe pressure, and automatically adjusting a choke in response to the comparing, thereby reducing a difference between the measured standpipe pressure and the desired standpipe pressure. A standpipe pressure control system for use in a drilling operation can include a controller which outputs an annulus pressure setpoint based on a comparison of a measured standpipe pressure to a desired standpipe pressure, and a choke which is automatically adjusted in response to the annulus pressure setpoint. A well system can include a standpipe line connected to a drill string in a wellbore, a sensor which measures pressure in the standpipe line, and a controller which outputs an annulus pressure setpoint based at least in part on a difference between the measured pressure and a desired standpipe pressure.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: September 16, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Kjetil A. Knudsen, Fredrik Varpe
  • Patent number: 8783381
    Abstract: A method of testing an earth formation can include incrementally opening a choke while drilling into the formation is ceased, thereby reducing pressure in a wellbore, and detecting an influx into the wellbore due to the reducing pressure in the wellbore. Another method of testing an earth formation can include drilling into the formation, with an annulus between a drill string and a wellbore being pressure isolated from atmosphere, then incrementally opening a choke while drilling is ceased, thereby reducing pressure in the wellbore, detecting an influx into the wellbore due to the reducing pressure in the wellbore, and determining approximate formation pore pressure as pressure in the wellbore when the influx is detected. Drilling fluid may or may not flow through the drill string when the influx is detected. A downhole pressure sensor can be used to verify pressure in the wellbore.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: July 22, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Stuart M. Jeffries
  • Patent number: 8783342
    Abstract: A system and method are provided for producing controlled vibrations within a borehole. In one example, the system includes a movement mechanism and a vibration control mechanism. The movement mechanism is configured to use mechanical energy provided by a mechanical energy source to enable translational movement of a first surface relative to a second surface to allow the first surface to repeatedly impact the second surface to produce a plurality of vibration beats, where the vibration beats will occur whenever the mechanical energy is provided by the mechanical energy source unless the provided mechanical energy is dampened to prevent the translational movement. The vibration control mechanism is configured to selectively control an amplitude of the vibration beats to encode information therein, where the amplitude of a vibration beat is selectively controlled by dampening the provided mechanical energy to regulate the impact of the first surface and the second surface.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: July 22, 2014
    Assignee: Hunt Advanced Drilling Technologies, LLC
    Inventor: Todd W. Benson
  • Patent number: 8781743
    Abstract: A computerized monitoring system and corresponding method of monitoring the status and health of a blowout preventer. The system includes a graphics display at which a graphical user interface (GUI) displays the health of various sealing elements and control systems by way of “traffic light” indicators. The health indicators are evaluated, by the monitoring system, based on a risk profile for each of the indicated elements and control systems. The risk profiles are evaluated based on inputs such as measurement inputs, feedback signals, mechanical positions, diagnostic results, drilling conditions, and other status information of the blowout preventer at a given time and based on levels of redundancy and levels of deviation from normal conditions. The GUI includes recent history of changes in operating condition, and alarm indications such as poor health, along with the times of those events.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: July 15, 2014
    Assignee: BP Corporation North America Inc.
    Inventors: James Edwin McKay, Gavin Triscott Starling
  • Patent number: 8757254
    Abstract: A method for controlling drilling fluid rate in a wellbore is disclosed. A drill string is disposed into the well and connected to a formation testing or sampling tool. Drilling fluid is circulated at a first rate through the drill string. Data related to the wellbore, a formation about the wellbore or the formation sampling tool is transmitted to a processor. Upon analysis of the data, the drilling fluid circulation rate is changed to a second rate that is different from the first rate.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: June 24, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Steven G. Villreal, Julian J. Pop, Vladimir Vaynshteyn
  • Patent number: 8752647
    Abstract: This application is directed to a pressure balanced mud motor. The mud motor includes a power section to rotate a passageway housing and propel fluid through a passageway disposed in the passageway housing. The mud motor also includes a hydraulic apparatus for balancing a pressure drop experienced across a bearing assembly due to frictional flow of fluid through the passageway.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: June 17, 2014
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock Watson, Gregory Kliewer, Roger L. Schultz
  • Patent number: 8739897
    Abstract: A pressure compensation system for a wellbore instrument coupled to a drill string includes a shaft rotatably mounted with respect to an instrument housing. A lubrication chamber included in the instrument has at least one bearing for rotatably supporting the shaft. The lubrication chamber includes a face seal coupled on one face to the shaft and on another face to the housing. A pressure compensator establishes hydraulic communication between the lubrication chamber and the interior of the drill string. The compensator includes a barrier to fluid movement between the lubrication chamber and the interior of the drill string. The barrier enables pressure communication therebetween. The compensator includes a pressure communication port extending between the barrier and a portion of the shaft exposed to the interior of the drill string.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 3, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard E. Thorp, Raju M. Eason, Charles Borsos
  • 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: 20140110169
    Abstract: A method of identifying a self-sustained influx of formation fluids into a wellbore includes the steps of closing an annular shut-off device and diverting an annular return flow from the wellbore through a first flow rate measurement device, measuring a flow rate of said annular return flow, measuring an inlet flow rate of fluids entering the well through a second flow rate measurement device in a fluid injection line, and identifying a self-sustained influx of formation fluids if a non-decreasing measured annular return flow rate is greater than said measured inlet flow rate.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Applicants: Safekick Ltd.
    Inventors: Helio SANTOS, Paul L. SONNEMANN
  • Patent number: 8689906
    Abstract: A method and apparatus for estimating the instantaneous rotational speed of a bottom hole assembly at the lower end of a drill string. In one embodiment, a method includes driving the drill string by a drilling mechanism at the upper end of the drill string. A fundamental frequency of stick-slip oscillations suffered by the drill string is estimated. Variations in a drive torque of the drilling mechanism are determined. Known torsional compliance of the drill string is combined with the variations in the drive torque. An output signal representing the instantaneous rotational speed is provided.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: April 8, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Pal Jacob Nessjoen, Age Kyllingstad
  • 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: 20140083767
    Abstract: A system and method for the drilling of ground holes by a track steer drill rig including a drilling arrangement that permits the speed of drilling holes to be balanced against the stability of the hole thus formed.
    Type: Application
    Filed: July 24, 2013
    Publication date: March 27, 2014
    Applicants: University of Sydney, Technological Resources Pty. Limited
    Inventors: Charles McHugh, Florian Andreas Oppoizer
  • Patent number: 8657034
    Abstract: A method of drilling a subterranean well bore using a tubular drill string described. One embodiment of the method includes the steps of injecting a drilling fluid into the well bore via the drill string and removing said drilling fluid from an annular space in the well bore around the drill string via a return line. The method can also include oscillating the pressure of the fluid in the annular space in the well bore, and monitoring the rate of flow of fluid along the return line.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: February 25, 2014
    Assignee: Managed Pressure Operations Pte Ltd
    Inventor: Christian Leuchtenberg
  • Publication number: 20140020953
    Abstract: Systems, apparatus and methods are described for purposes of initiating a response to detection of an adverse operational condition involving a system including a drill rig and an inground tool. The response can be based on an uphole sensed parameter in combination with a downhole sensed parameter. The adverse operational condition can involve cross-bore detection, frac-out detection, excessive downhole pressure, a plugged jet indication and drill string key-holing detection. A communication system includes an inground communication link that allows bidirectional communication between a walkover detector and the drill rig via the inground tool. Monitoring of inground tool depth and/or lateral movement can be performed using techniques that approach integrated values. Bit force based auto-carving is described in the context of an automated procedure.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 23, 2014
    Applicant: Merlin Technology, Inc
    Inventors: Albert W. Chau, Benjamin John Medeiros, Craig Caswell
  • Patent number: 8629895
    Abstract: A camera can be associated with each conference participant endpoint. The camera, either frame or video-based, can monitor and detect one or more of gestures, facial recognition, emotions, and movements of the conference participant. Based on the detection of one or more of these triggering events, a correlation to an action corresponding the triggering event can be evoked. For example, if a participant raises their hand, e.g., a triggering event, the system can recognize that this is a request to speak. The participant can then be queued in the system based, for example, relative to other participants' requests. When the other participants have finished speaking, and it is the time for the user who raised their hand to speak, the system can optionally queue the user by modifying the endpoint with which they are associated.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: January 14, 2014
    Assignee: Avaya Inc.
    Inventor: Vandy Lee
  • 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: 8490719
    Abstract: A method for maintaining pressure in a wellbore during drilling operations includes the steps of providing fluid from a reservoir through a drill string, circulating the fluid from the drill string to an annulus between the drill string and the wellbore, isolating pressure in the annulus, measuring pressure in the annulus, calculating a set point backpressure, applying back pressure to the annulus based on the set point back pressure, diverting fluid from the annulus to a controllable choke, controllably bleeding off pressurized fluid from the annulus, separating solids from the fluid, and directing the fluid back to the reservoir. An apparatus for maintaining pressure in a wellbore during drilling operations includes an adjustable choke for controllably bleeding off pressurized fluid from the wellbore annulus, a backpressure pump for applying a calculated set point backpressure, and a processor for controlling the adjustable choke and backpressure pump.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: July 23, 2013
    Assignee: M-I L.L.C.
    Inventors: Jason Duhe, James May
  • Patent number: 8453760
    Abstract: An apparatus and method for reducing temperature along a bottomhole assembly during a drilling operation is provided. In one aspect the bottomhole temperature may be reduced by drilling a borehole using a drill string having a bottomhole assembly at an end thereof, circulating a fluid through the drill string and an annulus between the drill string and the borehole, diverting a selected portion of the fluid from the drill string into the annulus at a selected location above the drill bit to reduce pressure drop across at least a portion of the bottomhole assembly to reduce temperature of the bottomhole assembly during the drilling operation.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: June 4, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Roger W. Fincher, Larry A. Watkins, Donald K. Trichel, Marcus Oesterberg
  • Patent number: 8448720
    Abstract: A method of drilling a wellbore can include drilling the wellbore with a continuous tubing drill string, and sensing at least one parameter with an optical waveguide in the drill string. A well system can include a continuous tubing drill string, and an optical waveguide in the drill string. The optical waveguide may sense at least one parameter distributed along the drill string.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: May 28, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: John L. Maida, Jr., Neal G. Skinner
  • Patent number: 8378842
    Abstract: A downhole tool string component has a through-bore intermediate first and second tool joints adapted for connection to adjacent tool string components. A blind-hole is formed in an outer surface of the component. A processing unit is also disposed within an outer surface of the component. An electrical device that is disposed within the component is in communication with the processing unit through an electrically or optically conductive medium which has a self-aligning pattern.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: February 19, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Jim Shumway, Brad Barger
  • Patent number: 8360170
    Abstract: A method of drilling a subterranean well bore using a tubular drill string is described. One embodiment of the method includes the steps of injecting a drilling fluid into the well bore via the drill string and removing the drilling fluid from an annular space in the well bore around the drill string via a return line. The method can also include oscillating the pressure of the fluid in the annular space in the well bore, and monitoring the rate of flow of fluid along the return line.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: January 29, 2013
    Assignee: Managed Pressure Operations PTE Ltd.
    Inventor: Christian Leuchtenberg
  • Patent number: 8347983
    Abstract: A Drill-To-The-Limit (DTTL) drilling method variant to Managed Pressured Drilling (MPD) applies constant surface backpressure, whether the mud is circulating (choke valve open) or not (choke valve closed). Because of the constant application of surface backpressure, the DTTL method can use lighter mud weight that still has the cutting carrying ability to keep the borehole clean. The DTTL method identifies the weakest component of the pressure containment system, such as the fracture pressure of the formation or the casing shoe leak off test (LOT). With a higher pressure rated RCD, such as 5,000 psi (34,474 kPa) dynamic or working pressure and 10,000 psi (68,948 kPa) static pressure, the limitation will generally be the facture pressure of the formation or the LOT. In the DTTL method, since surface backpressure is constantly applied, the pore pressure limitation of the conventional drilling window can be disregarded in developing the fluid and drilling programs.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: January 8, 2013
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Carel W. Hoyer, Don M. Hannegan, Thomas F. Bailey, Melvin T. Jacobs, Nicky A. White