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:
Aug. 24, 1982
Filed:
Mar. 17, 1980
Applicant:
Inventors:
Roger Smith, Jr, Georgetown, TX (US);
Faustyn C Langowski, Georgetown, TX (US);
Assignee:
BJ-Hughes Inc., Round Rock, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
414 22 ; 414753 ; 414917 ; 175 85 ; 211 / ;
Abstract
Apparatus for moving stands of pipe in a derrick having a powered turret mounted in a selected position relative to the derrick and a vertical leg supported and rotated by the turret. A powered dolly is mounted on the vertical leg and moves one end of a power arm to selected positions along the vertical leg. A pipe gripping head is mounted to the opposite end of the power arm. A scissor arm is rotatably connected at one end in mid-region of the power arm and at the other end to the vertical leg. As a consequence, the pipe gripping head moves reciprocally in a straight line to engage, move, and disengage stands of pipe.