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Inventor

RICHARDSON ALLAN S

US11 patents
⚠️ This page may combine multiple inventors who share the name “RICHARDSON ALLAN S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CANRIG DRILLING TECH LTD

4 patents
US6679333B2Jan 20, 2004

Top drive well casing system and method

CANRIG DRILLING TECH LTD240 citations98
US6082225AJul 4, 2000

Power tong wrench

CANRIG DRILLING TECH LTD79 citations95
US6920926B2Jul 26, 2005

Top drive well casing system

CANRIG DRILLING TECH LTD40 citations91
US7543650B2Jun 9, 2009

Quill saver sub

CANRIG DRILLING TECH LTD14 citations83

RICHARDSON ALLAN S

3 patents
US5251709AOct 12, 1993

Drilling rig

RICHARDSON ALLAN S185 citations97
USRE44973EJul 1, 2014

Drilling method and apparatus

RICHARDSON ALLAN S14 citations88
USRE44956EJun 24, 2014

Drilling method and apparatus

RICHARDSON ALLAN S14 citations88

NABORS IND INC

2 patents
US6024181AFeb 15, 2000

Portable top drive

NABORS IND INC106 citations96
US5755296AMay 26, 1998

Portable top drive

NABORS IND INC61 citations91

(unassigned)

2 patents
US6840493B2Jan 11, 2005

Valve actuator

35 citations91
US5785132AJul 28, 1998

Backup tool and method for preventing rotation of a drill string

97 citations91