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. 21, 1992
Filed:
Feb. 09, 1990
Frank C Forest, Richmond, TX (US);
Thomas M Wagner, III, Houston, TX (US);
Gailen D Marshall, Houston, TX (US);
Sharewell, Inc., Houston, TX (US);
Abstract
A method for positioning an added length of wire in a drill string is set forth, and it is especially intended for use in drilling a slant hole, as typically occurs to drill under a river, or under other surface obstacles. A cartridge is disclosed; it has an upper flange at one end, a hook or eyelet across the flange to engage a hook and line for pulling the cartridge along the drill string, and further includes latching means for latching the cartridge at a specified location in a drill string. It further includes a spool for storage of wire, and the wire extends from an annular space for storage and the annular space is defined by a pair on concentric cylindrical sleeves. A method of use is also set forth wherein the cartridge is moved from drill pipe joint to joint and supports an elongate wire which is spooled therearound and which is pulled from the spool position. The wire, on emerging, encounters frictional drag to assure that only the wire length necessary is spooled out of the device.