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:
May. 27, 1986
Filed:
Feb. 06, 1984
Applicant:
Inventor:
Lowell M Reed, Moore, OK (US);
Assignee:
Parco Mast and Substructure, Inc., Tulsa, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
52121 ; 52632 ; 254336 ;
Abstract
A heavy duty drilling mast or derrick made of a plurality of elements which telescope one into another so that the derrick can be raised from a collapsed position to an extended position with vertical axis by means of a plurality of four cables--one in each corner of the derrick. Each element is a rectangular box with open top and bottom, and each element can be locked to its upper and lower neighbors in the extended position so as to provide a strong, rigid derrick for drilling deep wells. Each element can be removed from the assembly and carried by helicopter from one location to another.