Patents by Inventor Ashley Bernard Johnson
Ashley Bernard Johnson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20100038141Abstract: A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and one or more gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be coupled with chassis. The one or more gauge pads may include a second plurality of cutters, and the one or more gauge pads may be movably coupled with the chassis.Type: ApplicationFiled: August 13, 2008Publication date: February 18, 2010Applicant: Schlumberger Technology CorporationInventors: Ashley Bernard Johnson, Geoffrey C. Downton, John M. Cook
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Publication number: 20100038139Abstract: A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be movably coupled with chassis. The first plurality of gauge pads may include a second plurality of cutters, and the first plurality of gauge pads may be fixedly coupled with the chassis.Type: ApplicationFiled: August 13, 2008Publication date: February 18, 2010Applicant: Schlumberger Technology CorporationInventors: Ashley Bernard Johnson, Geoffrey C. Downton, John M. Cook
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Publication number: 20100038140Abstract: A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The chassis may be configured to be operably coupled with a first rotational motion source. The head may include a first plurality of cutters coupled with an end of the head, and the head may be rotatably coupled with chassis. The head may be configured to be operably coupled with a second rotational motion source. The first plurality of gauge pads may include a second plurality of cutters, and the first plurality of gauge pads may be fixedly coupled with the chassis.Type: ApplicationFiled: August 13, 2008Publication date: February 18, 2010Applicant: Schlumberger Technology CorporationInventors: Ashley Bernard Johnson, Geoffrey C. Downton, John M. Cook
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Publication number: 20090151939Abstract: Downhole systems and methods including tags configured to provide distinguishable identifiers are set for selective release to a subsurface location. Sources/sensors in the wellbore are activated to detect the tags at a subsurface location, and signal data associated with the detected tags is conveyed to the surface.Type: ApplicationFiled: December 13, 2007Publication date: June 18, 2009Applicant: Schlumberger Technology CorporationInventors: Louise Bailey, Ashley Bernard Johnson, Alistair William Oag, Lee Dolman
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Publication number: 20090114386Abstract: This disclosure relates in general to a method and system for monitoring a conduit, a wellbore or a reservoir associated with hydrocarbon production or transportation and/or carbon dioxide sequestration. More specifically, but not by way of limitation, embodiments of the present invention provide for using an optical fiber as a distributed interferometer that may be used to monitor the conduit, wellbore or reservoir.Type: ApplicationFiled: November 2, 2007Publication date: May 7, 2009Inventors: Arthur H. Hartog, J. Ernest Brown, John Mervyn Cook, Jonathan Elphick, Paul S. Hammond, Ashley Bernard Johnson
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Publication number: 20090044978Abstract: A drill bit direction system and method is disclosed that modifies or biases the stochastic movement of the drill bit and/or stochastic interactions between the drill bit and an inner-wall of a borehole being drilled by a drilling system to change the direction of drilling of the drilling system. The direction of the drill bit is monitored to determine if the direction happens to align in some way with a preferred direction. If the direction isn't close enough to a preferred direction, a biasing mechanism modifies the stochastic movement in an attempt to modify the direction closer to the preferred direction. Any of a number of biasing mechanisms can be used. Some embodiments can resort to conventional steering mechanisms to supplement the biasing mechanism.Type: ApplicationFiled: May 7, 2008Publication date: February 19, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Ashley Bernard Johnson, Michael Charles Sheppard, Geoff Downton
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Publication number: 20090044980Abstract: This disclosure relates in general to a method and a system for directionally drilling a borehole with a rotary drilling system. More specifically, but not by way of limitation, methods and system provide for controlling motion of the rotary drilling system in the borehole when a side force is applied to the drilling system to bias or focus the motion so that the drilling system directionally drills the borehole through an earth formation. In certain aspects, side cutting of a sidewall of the borehole by a drill bit under an applied side force is controlled by a geostationary element to provide for directional side cutting and, as a result, directional drilling of the borehole through the earth formation. In other aspects, a non-concentrically coupled gauge pad assembly may rotate with the drilling system and bias or focus the applied side force.Type: ApplicationFiled: May 7, 2008Publication date: February 19, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Charles Sheppard, Ashley Bernard Johnson, Geoff Downton
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Publication number: 20090044981Abstract: A drill bit direction system and method is disclosed that modifies or biases the stochastic movement of the drill bit to change a drilling direction of a drilling system. The direction of the drill bit is monitored to determine if the direction happens to align in some way with a preferred direction. If the direction isn't close enough to a preferred or desired direction, stochastic motion of the drill bit in the borehole may be controlled and/or motion of the drill bit under a side force acting on the drill bit to direct the drilling may be focused or biased to modify the direction of drilling closer to the preferred direction. Any of a number of stochastic motion control mechanisms or biasing mechanisms can be used. Some embodiments can resort to conventional steering mechanisms to supplement the stochastic motion control or side force biasing mechanisms.Type: ApplicationFiled: May 7, 2008Publication date: February 19, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Charles Sheppard, Ashley Bernard Johnson, Geoff Downton
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Publication number: 20090044979Abstract: The present specification describes a drill bit for drilling a cavity. The drill bit may include a chassis, a plurality of gauge pad sets, and at least one gauge pad structure. The chassis may be configured to rotate about an axis. The plurality of gauge pad sets may each include at least one gauge pad. The at least one gauge pad structure may moveably couple at least one of the gauge pads of at least one of the plurality of gauge pad sets with the chassis.Type: ApplicationFiled: May 7, 2008Publication date: February 19, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Ashley Bernard Johnson, Michael Charles Sheppard, Geoff Downton
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Publication number: 20080307877Abstract: The present invention provides an apparatus an methods for detecting the behavior of perforations in a wellbore casing, the apparatus including a sensor array movable within the internal diameter of the casing, the sensor array having one or more sensors located proximate the internal surface of the casing with the sensors being located or oriented such that properties of flow from a proximate perforation can be distinguished from properties of a main flow through the wellbore.Type: ApplicationFiled: November 16, 2005Publication date: December 18, 2008Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: John Mervyn Cook, Ashley Bernard Johnson
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Patent number: 6993432Abstract: A method and system is disclosed for communicating information from a downhole location to the surface including a plurality of releasable vessels containing predetermined signal information affixed to the vessels prior to placement of the vessels downhole and indicative of the presence of at least one of three or more predetermined downhole conditions and a sensing and releasing system that senses the occurrence of the downhole condition, such as a simple threshold, and release the vessels in response to the sensing. The predetermined downhole condition can be characteristic of the fluid being produced in the borehole, such as water fraction, a certain level of mechanical wear or damage to downhole equipment such as bit wear, or the firing a one or more charges on a wireline deployed perforation tool.Type: GrantFiled: December 12, 2003Date of Patent: January 31, 2006Assignee: Schlumberger Technology CorporationInventors: Charles Roderick Jenkins, Ashley Bernard Johnson, Harry Barrow, Michael Paul Barrett
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Publication number: 20040204856Abstract: A method and system is disclosed for communicating information from a downhole location to the surface. A plurality of releasable vessels are positioned downhole, each containing signal information affixed to the vessels prior to placement of the vessels downhole. The signal information indicates the presence of at least one of three or more predetermined downhole conditions. A detecting system is positioned on the surface such that the signal information can be detected on one or more of the vessels. The predetermined downhole condition can be characteristic of the fluid being produced in the borehole, such as water fraction, a certain level of mechanical wear or damage to downhole equipment such as bit wear, or the firing a one or more charges on a wireline deployed perforation tool.Type: ApplicationFiled: December 12, 2003Publication date: October 14, 2004Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Charles Roderick Jenkins, Ashley Bernard Johnson, Harry Barrow, Michael Paul Barrett
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Patent number: 6062311Abstract: An apparatus for cleaning subterranean wellbores is described. The apparatus comprises a sleeve member which is fixed to a part of the drillstring and a rotatable jet head with nozzles through which an abrasive fluid is discharged. The nozzles are mounted such that the fluid jet is directed to an area of the wellbore immediately adjacent to a leading edge of the sleeve. The nozzle head is restricted in its protrusion out of the sleeve.Type: GrantFiled: December 10, 1997Date of Patent: May 16, 2000Assignee: Schlumberger Technology CorporationInventors: Ashley Bernard Johnson, David Scott, David M. Eslinger
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Patent number: 6058771Abstract: When drilling a borehole for an oil well it is desirable to know when fluid is passing through the walls of the borehole between the borehole itself and the formation through which the borehole is passing. It has now been discovered that useful information about the influx or efflux of fluid can be gained by observing the pressure within the borehole in the region of the drilling bit, this observation being carried out not when the drill is actually operating but when it is still (and the pipe string to which it is mounted is also still) and the drilling fluid is not being pumped; the basis for this is that the drilling fluid is thixotropic, and when not disturbed will form a gel which is capable of quite accurately transmitting the force created by moving fluids at the interface between the borehole and the earth formation being drilled through--that is inflowing or outflowing fluids--displacing the drilling fluid along the borehole, and with an efficiency far greater than previously recognized.Type: GrantFiled: February 1, 1999Date of Patent: May 9, 2000Assignee: Schlumberger Technology CorporationInventors: Ashley Bernard Johnson, Iain Rezmer-Cooper
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Patent number: 6032741Abstract: Novel abrasive particles for cleaning subterranean wellbores are described. The particles are rounded, preferably spherical, and has a hardness of 80 to 200 Vickers. The particles are preferably made of non-metallic material such as Calcite pellets. The new abrasives cause significantly less damage to the well tubulars than sand.Type: GrantFiled: December 10, 1997Date of Patent: March 7, 2000Assignee: Schlumberger Technology CorporationInventor: Ashley Bernard Johnson
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Patent number: 5944123Abstract: Apparatus for drilling a well comprising, in one embodiment, a borehole assembly having a motor rotated drill head with ports for emitting a fluid, coiled tubing operatively associated with the drill head to supply fluid and support the drill head, the borehole assembly adapted to drill a channel off axis by varying the speed of the motor drive during a cycle or by varying fluid pressure to the drill head during a cycle.Type: GrantFiled: August 15, 1996Date of Patent: August 31, 1999Assignee: Schlumberger Technology CorporationInventor: Ashley Bernard Johnson