Jian Wu

US Patent:

7991475, Aug 2, 2011

Filed:

Jun 8, 2006

Appl. No.:

11/450965

Inventors:

William C. Tang - Irvine CA, US
Jian Wu - Irvine CA, US
Ryan Hainley - San Diego CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

A61N 1/05

US Classification:

607 45, 607 2

Abstract:

Devices, systems and methods that comprise or utilize implantable electrode arrays for neural stimulation and/or sensing. In some embodiments, the electrode array is implanted or inserted into the auditory nerve and is used to deliver electrical impulses to/receive data from the auditory nerve in the treatment of hearing disorders.

US Patent:

20110284233, Nov 24, 2011

Filed:

May 20, 2011

Appl. No.:

13/112326

Inventors:

Jian Wu - Spring TX, US
Jianbing Hu - Houston TX, US
Tommy G. Ray - Spring TX, US
Dwayne Terracina - Spring TX, US

Assignee:

SMITH INTERNATIONAL, INC. - Houston TX

International Classification:

E21B 34/00
E21B 10/36

US Classification:

166321, 175428

Abstract:

A downhole tool assembly is configured for repeated and selective hydraulic actuation and deactuation. A piston assembly is configured to reciprocate axially in a downhole tool body. The piston assembly reciprocates between a first axial position and second and third axial positions that axially oppose the first position. The downhole tool is actuated when the piston assembly is in the third axial position and deactuated when the piston assembly is in either of the first or second axial positions. A spring member biases the piston assembly towards the first axial position while drilling fluid pressure in the tool body urges the piston assembly towards the second and third axial positions. Downhole tool actuation and deactuation may be controlled from the surface, for example, via cycling the drilling fluid flow rate.

US Patent:

20130098688, Apr 25, 2013

Filed:

Oct 15, 2012

Appl. No.:

13/651947

Inventors:

Smith International, Inc. - Houston TX, US
JIAN WU - HOUSTON TX, US

Assignee:

SMITH INTERNATIONAL, INC. - HOUSTON TX

International Classification:

E21B 10/08
E21B 10/22
E21B 10/18

US Classification:

175227, 175336, 175341, 175331, 175374

Abstract:

A drill bit may include a bit body rotatable about a longitudinal axis and having, at one end, a connection for securing the drill bit to a drill string and having a face opposite the connection end; and a plurality of cutting structures having at least one fixed cutting structure disposed on the bit body face and at least one cutting body rotatably attached to the face of the bit body; wherein, in a rotated view of the plurality of cutting structures into a single plane, there is substantially no radial overlap between at least one fixed cutting structure and the at least one cutting body.

US Patent:

20210131258, May 6, 2021

Filed:

Oct 30, 2020

Appl. No.:

17/085224

Inventors:

- Sugar Land TX, US
Jian Wu - Houston TX, US
Benjamin Peter Jeffryes - Cambridge, GB

International Classification:

E21B 44/02
E21B 45/00
E21B 4/02

Abstract:

Methods and apparatus pertaining to scaling of the proportional gain and the integral gain in PI controllers of an autodriller based on drilling context. For example, a proportional gain and an integral gain are each determined for utilization by a PI controller of an autodriller controlling operation of equipment to be utilized for a drilling operation to drill a borehole into a subterranean formation. During the drilling operation, the integral gain is updated in real-time utilizing current values of drilling parameters that change with respect to time.

US Patent:

20210131259, May 6, 2021

Filed:

Nov 4, 2020

Appl. No.:

17/088735

Inventors:

- Sugar Land TX, US
Nathaniel Wicks - Somerville MA, US
Jian Wu - Houston TX, US

International Classification:

E21B 44/04

Abstract:

Apparatus and methods for optimizing a stick-slip algorithm for controlling a driver of a drill string. A method may include commencing operation of a control system for controlling the driver. The control system may have a processor and a memory storing a computer program code, which may include the stick-slip algorithm. The operating control system may receive a plurality of different numerical parameters, and for each of the different numerical parameters, incorporate the numerical parameter into the stick-slip algorithm and execute the stick-slip algorithm to determine a control command that causes the driver to rotate the drill string to perform drilling operations while reducing amplitude of rotational waves travelling along the drill string.

US Patent:

20210115779, Apr 22, 2021

Filed:

Oct 19, 2020

Appl. No.:

17/073444

Inventors:

- Sugar Land TX, US
Jian Wu - Houston TX, US
Nathaniel Wicks - Somerville MA, US

International Classification:

E21B 44/04
E21B 45/00

Abstract:

Apparatus and methods for automatically controlling selected drilling operations. The apparatus may be a control system operable to control rate of penetration (ROP) by a drill bit of a drill string for drilling a wellbore. The control system may include a sensor operable to facilitate an ROP measurement indicative of a measured ROP and a controller comprising a processor and a memory storing computer program code. The controller may be operable to receive the ROP measurement, determine an intermediate ROP setpoint based on the ROP measurement, and determine an ROP command based on the intermediate ROP setpoint, wherein the ROP command is to be received by a drawworks and is indicative of an intended ROP.

US Patent:

20200378237, Dec 3, 2020

Filed:

May 28, 2019

Appl. No.:

16/423606

Inventors:

- Sugar Land TX, US
Ying Yu Fang - Katy TX, US
Jian Wu - Houston TX, US
Ginger Hildebrand - Houston TX, US
Steven Duplantis - Houston TX, US
Kam Lui - Houston TX, US

International Classification:

E21B 44/04
E21B 3/02
E21B 7/06

Abstract:

Systems and methods for performing slide drilling and for determining operational parameters to be utilized during slide drilling. An example method includes commencing operation of a processing device, whereby the processing device determines a reference rotational distance of a top drive to be utilized during slide drilling. The processing device outputs a control command to the top drive to cause the top drive to rotate a drill string. The processing device also determines the reference rotational distance based on rotational distance measurements indicative of rotational distance achieved by the top drive and torque measurements indicative of torque applied to the drill string by the top drive.

US Patent:

20160348440, Dec 1, 2016

Filed:

May 27, 2015

Appl. No.:

14/722193

Inventors:

- Houston TX, US
Jiaqing Yu - Conroe TX, US
Yuelin Shen - Spring TX, US
Youhe Zhang - Spring TX, US
Yong Zhou - Spring TX, US
Jian Wu - Houston TX, US

International Classification:

E21B 10/08
E21B 10/50
E21B 10/14

Abstract:

A drill bit includes a bit body having a longitudinal bit axis extending there through, a plurality of journals extending from the bit body, each journal having a journal axis extending from a base of the journal through the length of the journal, a roller cone rotatably mounted to each of the journals, and at least one blade protruding from the bit body center and extending radially outward to less than an outer diameter of the drill bit.