The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2008
Filed:
May. 17, 2005
Applicants:
Floyd R. Gunsaulis, Perry, OK (US);
Kelvin P. Self, Stillwater, OK (US);
Inventors:
Floyd R. Gunsaulis, Perry, OK (US);
Kelvin P. Self, Stillwater, OK (US);
Assignee:
The Charles Machine Works, Inc., Perry, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 10/32 (2006.01); E21B 41/00 (2006.01); E21B 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, a plurality of pipe-bursting members, driven by the interconnected inner members, cut or burst a subterranean pipe. In another preferred embodiment, a plurality of screw drives move the pipe-bursting members between an expanded position and a retracted position in response to rotation of the interconnected inner members.