Bradley Gene Mitchell

US Patent:

7628226, Dec 8, 2009

Filed:

Jul 26, 2007

Appl. No.:

11/828963

Inventors:

Bradley E. Mitchell - Perry OK, US
Geoff D. Koch - Perry OK, US

Assignee:

The Charles Machine Works, Inc. - Perry OK

International Classification:

E21B 19/14

US Classification:

175 27, 175 24, 175 19, 175 52

Abstract:

A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer spindle and an inner spindle, and is adapted to connect to a pipe section having an outer pipe section and an inner pipe section. Inner joints are geometrically shaped, while outer joints are threaded. When making up dual, member drill string, the spindle is advanced, with the outer spindle rotating, and the inner spindle rotating in alternating directions, or “dithering. ” A float sensor and a processor are used in tandem to cooperatively couple the inner spindle with the inner pipe sections and the outer spindle with the outer pipe sections.

US Patent:

7987924, Aug 2, 2011

Filed:

Dec 7, 2009

Appl. No.:

12/632326

Inventors:

Bradley E. Mitchell - Perry OK, US
Geoff D. Koch - Perry OK, US

Assignee:

The Charles Machine Works, Inc. - Perry OK

International Classification:

E21B 44/00

US Classification:

175 27, 175 24, 166380

Abstract:

A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer spindle and an inner spindle, and is adapted to connect to a pipe section having an outer pipe section and an inner pipe section. Inner joints are geometrically shaped, while outer joints are threaded. When making up dual member drill string, the spindle is advanced, with the outer spindle rotating, and the inner spindle rotating in alternating directions, or “dithering. ” A float sensor and a processor are used in tandem to cooperatively couple the inner spindle with the inner pipe sections and the outer spindle with the outer pipe sections.

US Patent:

20110278065, Nov 17, 2011

Filed:

Jul 28, 2011

Appl. No.:

13/192547

Inventors:

Bradley E. Mitchell - Perry OK, US
Geoff D. Koch - Perry OK, US

Assignee:

The Charles Machine Works, Inc. - Perry OK

International Classification:

E21B 44/00

US Classification:

175 27

Abstract:

A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer spindle and an inner spindle, and is adapted to connect to a pipe section having an outer pipe section and an inner pipe section. Inner joints are geometrically shaped, while outer joints are threaded. When making up dual member drill string, the spindle is advanced, with the outer spindle rotating, and the inner spindle rotating in alternating directions, or “dithering.” A float sensor and a processor are used in tandem to cooperatively couple the inner spindle with the inner pipe sections and the outer spindle with the outer pipe sections.

US Patent:

20120255779, Oct 11, 2012

Filed:

Jun 13, 2012

Appl. No.:

13/495138

Inventors:

Bradley E. Mitchell - Perry OK, US
Geoff D. Koch - Perry OK, US

Assignee:

The Charles Machine Works, Inc. - Perry OK

International Classification:

E21B 44/00

US Classification:

175 27

Abstract:

A system and method of making up and breaking out a dual-member drill string. The system comprises a spindle, a spindle carriage and a drive frame. The drive frame provides thrust to the spindle, while the spindle carriage provides rotation. The spindle has an outer spindle and an inner spindle, and is adapted to connect to a pipe section having an outer pipe section and an inner pipe section. Inner joints are geometrically shaped, while outer joints are threaded. When making up dual member drill string, the spindle is advanced, with the outer spindle rotating, and the inner spindle rotating in alternating directions, or “dithering.” A float sensor and a processor are used in tandem to cooperatively couple the inner spindle with the inner pipe sections and the outer spindle with the outer pipe sections.

US Patent:

56844662, Nov 4, 1997

Filed:

Sep 12, 1995

Appl. No.:

8/526970

Inventors:

Donald J. Keating - Perry OK
Joel B. Edwards - Perry OK
Bradley E. Mitchell - Perry OK
Kelvin P. Self - Stillwater OK

Assignee:

The Charles Machine Work, Inc. - Perry OK

International Classification:

G08B 2100

US Classification:

340662

Abstract:

An electrical strike sensing system for providing an alarm if the underground boring equipment encounters a potentially hazardous condition. The system senses current carried through the equipment, as well as the voltage between the equipment and a reference. The measured current is converted to a percentage of a reference current, and the voltage is converted to a percentage of a reference voltage. The current and voltage percentages are added, and if the sum exceeds 100%, the alarms are activated. The current and voltage percentages, as well as the date and time of the strike, are stored in a nonvolatile memory.