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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Sugiura; Junichi
Address:
Houston, TX
No. of patents:
12
Patents:












Patent Number Title Of Patent Date Issued
8570833 Downlinking communication system and method October 29, 2013
A downlinking signal is transmitted downhole from the surface using drilling fluid as the communications medium. The downlinking signal includes at least a synchronization phase and a command phase. Attributes of the synchronization phase are used upon reception of the signal to dete
8118114 Closed-loop control of rotary steerable blades February 21, 2012
A steering tool has a controller configured to provide closed-loop control of blade pressure and position. In one embodiment, the controller is configured to execute a directional control methodology in which the drilling direction is controlled via control of the blade position. The
8102276 Non-contact capacitive datalink for a downhole assembly January 24, 2012
Aspects of this invention include a downhole assembly having a non-contact, capacitive coupling including first and second transceivers deployed in corresponding first and second downhole tool members. The capacitive coupling is disposed to transfer electrical signals between the fir
7967081 Closed-loop physical caliper measurements and directional drilling method June 28, 2011
Aspects of this invention include a downhole tool and method for making a physical caliper measurement of a subterranean borehole. The tool is configured to make the physical borehole caliper measurement only when the measured pressure in each of three or more outwardly extendable bl
7950473 Non-azimuthal and azimuthal formation evaluation measurement in a slowly rotating housing May 31, 2011
A steering tool configured for making azimuthal and non-azimuthal formation evaluation measurements is disclosed. In one embodiment a rotary steerable tool includes at least one formation evaluation sensor deployed in the steering tool housing. The steering tool may include, for exam
7725263 Gravity azimuth measurement at a non-rotating housing May 25, 2010
Aspects of this invention include methods for surveying a subterranean borehole. In one exemplary aspect, a change in borehole azimuth between first and second longitudinally spaced gravity measurement sensors may be determined directly from gravity measurements made by the sensors and a
7571643 Apparatus and method for downhole dynamics measurements August 11, 2009
Aspects of this invention include a rotary steerable steering tool having a sensor arrangement for measuring downhole dynamic conditions. Rotary steerable tools in accordance with this invention include a rotation rate measurement device disposed to measure a difference in rotation rates
7558675 Probablistic imaging with azimuthally sensitive MWD/LWD sensors July 7, 2009
A method for forming a borehole image of an azimuthally sensitive borehole or formation parameter is disclosed. Such a borehole image may be formed, for example, by processing logging sensor data with a predetermined sensor response function (also referred to herein as a probability
7464770 Closed-loop control of hydraulic pressure in a downhole steering tool December 16, 2008
Aspects of this invention include a steering tool having a controller configured to provide closed-loop control of hydraulic fluid pressure. In one exemplary embodiment, closed-loop control of a system (reservoir) pressure may be provided. In another embodiment, closed-loop control of a
7426967 Rotary steerable tool including drill string rotation measurement apparatus September 23, 2008
Aspects of this invention include a downhole tool (such as a steering tool) including first and second sensor sets for measuring substantially instantaneous drill string rotation rates. Each of the sensor sets includes at least one accelerometer disposed to measure cross-axial accele
7377333 Linear position sensor for downhole tools and method of use May 27, 2008
Aspects of this invention include a downhole tool having first and second members disposed to translate substantially linearly with respect to one another. A magnet is deployed on the first member and a plurality of magnetic field sensors is deployed on the second member. The magnetic
7222681 Programming method for controlling a downhole steering tool May 29, 2007
A method for communicating with a downhole tool located in a subterranean borehole is disclosed. Exemplary embodiments of the method include encoding data and/or commands in a sequence of varying drill string rotation rates and drilling fluid flow rates. The varying rotation rates an










 
 
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