Chih S Lin

US Patent:

6419032, Jul 16, 2002

Filed:

Feb 6, 2001

Appl. No.:

09/777813

Inventors:

Eric Charles Sullivan - Houston TX
Scott Ray Schmidt - The Woodlands TX
Don Quy Nguyen - Houston TX
Glenn R. Zadrapa - Highlands TX
Chih Lin - Spring TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 1022

US Classification:

175 40, 73 5305

Abstract:

An improved drill bit includes a condition sensor and a semiconductor memory. The condition sensor includes an electrical sensor which has an attribute which changes in response to changes in the bit condition. Monitoring and sampling circuits are utilized to record this data into the semiconductor memory. A communication system may be provided which includes a signal flow path and a selectively-actuable flow control device for controlling the signal flow path until a predetermined operating condition is detected; upon actuation, a detectable pressure change is developed in the wellbore.

US Patent:

6540033, Apr 1, 2003

Filed:

Feb 6, 2001

Appl. No.:

09/783265

Inventors:

Eric Charles Sullivan - Houston TX
Scott Ray Schmidt - The Woodlands TX
Don Quy Nguyen - Houston TX
Glenn R. Zadrapa - Highlands TX
Chih Lin - Spring TX

Assignee:

Baker Hughes Incorporated - TX

International Classification:

E21B 718

US Classification:

175 40, 175237, 175339

Abstract:

An improved drill bit is provided with a sensor for monitoring an operating condition during drilling. A fastener system is provided for securing an erodible ball in a fixed position relative to a flow pathway until a predetermined operating condition is detected by the sensor, and for releasing the erodible ball into the flow pathway to obstruct the flow through at least one bit nozzle.

US Patent:

6543312, Apr 8, 2003

Filed:

Feb 6, 2001

Appl. No.:

09/777332

Inventors:

Eric Charles Sullivan - Houston TX
Scott Ray Schmidt - The Woodlands TX
Don Quy Nguyen - Houston TX
Glenn R. Zadrapa - Highlands TX
Chih Lin - Spring TX

Assignee:

Baker Hughes Incorporated - TX

International Classification:

B21K 502

US Classification:

761082, 175 40

Abstract:

A drill bit for use in drilling operations in a wellbore, the drill bit having a bit body including a plurality of bit legs, each supporting a rolling cone cutter; a coupling member formed at an upper portion of the bit body; at least one temperature sensor for monitoring at least one temperature condition of the improved drill bit during drilling operations; and at least one temperature sensor cavity formed in the bit body and adapted for receiving, carrying, and locating the at least one temperature sensor in a particular position relative to the bit body which is empirically determined to optimize temperature sensor discrimination.

US Patent:

6626251, Sep 30, 2003

Filed:

Feb 6, 2001

Appl. No.:

09/777569

Inventors:

Eric Charles Sullivan - Houston TX
Scott Ray Schmidt - The Woodlands TX
Don Quy Nguyen - Houston TX
Glenn R. Zadrapa - Highlands TX
Chih Lin - Spring TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 1000

US Classification:

175 40

Abstract:

An improved drill bit is provided with a sensor for monitoring an operating condition during drilling. A fastener system is provided for securing an erodible ball in a fixed position relative to a flow pathway until a predetermined operating condition is detected by the sensor, and for releasing the erodible ball into the flow pathway to obstruct the flow through at least one bit nozzle.

US Patent:

6684966, Feb 3, 2004

Filed:

Oct 18, 2001

Appl. No.:

09/982899

Inventors:

Chih Lin - Spring TX
Terry Koltermann - The Woodlands TX
Danny E. Scott - Montgomery TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 1022

US Classification:

175372, 384 94

Abstract:

An earth-boring bit has a mechanical face seal assembly with PCD faces. The bit has a bearing shaft with a cone rotatably mounted on the bearing shaft. The seal locates between the bearing shaft and the cone for sealing lubricant therein. The seal includes at least one rigid seal ring having a carbide body and an annular PCD face located on it. The mating face may also be of a PCD material.

US Patent:

7066286, Jun 27, 2006

Filed:

Mar 25, 2004

Appl. No.:

10/809644

Inventors:

Don Q. Nguyen - Houston TX, US
Terry J. Koltermann - The Woodlands TX, US
Gregory L. Ricks - Spring TX, US
Mark E. Morris - Lafayette LA, US
Chris M. McCarty - Houston TX, US
Chih C. Lin - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 10/00

US Classification:

175313

Abstract:

A gage scraper cleans mud from the gage surface of a rotary cone of a drill bit. The bit has a body having at least one leg depending therefrom, a bearing pin secured to each leg, and a rotary cutting cone mounted to the bearing pin. The cone has a conical gage surface. The gage scraper mounts on the inside of each leg and protrudes from the leg toward the cone into close proximity with the gage surface.

US Patent:

7066287, Jun 27, 2006

Filed:

Feb 17, 2004

Appl. No.:

10/780389

Inventors:

Chih C. Lin - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 10/22

US Classification:

175371

Abstract:

A rolling cone earth boring bit has a diverter located between the bit leg and the back face of the cone to divert debris from the seal gland area. The diverter has a base that inserts into a hole in a last machined surface of the bit. The diverter has a head that is wedge-shaped and protrudes from the hole into a clearance between the back face and the last machined surface. The head has an inner side that is spaced from an annular wall of the back face by a small uniform clearance. The head has an outer side that is oblique to the annular wall of the back face region to divert debris from the clearance.

US Patent:

7128171, Oct 31, 2006

Filed:

Feb 23, 2004

Appl. No.:

10/784339

Inventors:

Aaron J. Dick - Houston TX, US
Chih C. Lin - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 10/24
E21B 10/18

US Classification:

175228, 175337, 175339, 384 93

Abstract:

An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubricant pressure to the exterior of the bit. A first passage leads from the reservoir to the upper side of the bearing pin. A second passage leads from the reservoir to the bearing pin at a point from 185 degrees to 225 degrees as seen from an inner end of the bearing pin. This point is located in a diverging region of an annular clearance surrounding the bearing pin.