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:
Feb. 01, 2005
Filed:
Jun. 28, 2002
Richard Felix Sharp, Perry, OK (US);
Matthew L. Dock, Stillwater, OK (US);
H. Stanley Mullins, Perry, OK (US);
John Allan Skinner, Lucien, OK (US);
Richard Felix Sharp, Perry, OK (US);
Matthew L. Dock, Stillwater, OK (US);
H. Stanley Mullins, Perry, OK (US);
John Allan Skinner, Lucien, OK (US);
The Charles Machine Works, Inc., Perry, OK (US);
Abstract
A rotating inner member is used to drive operation of a retrieval tool connected to a dual-member drill string. The retrieval tool preferably has a gripping assembly adapted to receive rotational energy from the inner member. In a preferred embodiment, an electric actuator assembly operates the gripping assembly of the retrieval tool. In another preferred embodiment, the gripping assembly of the retrieval tool is mechanically operated by a screw driven cam assembly. In yet another embodiment, the retrieval tool is adapted to grip both the inside and outside of the object to be retrieved.