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. 16, 1988
Filed:
Apr. 24, 1986
Clifford L Aseltine, Houston, TX (US);
Schlumberger Technology Corporation, Houston, TX (US);
Abstract
A unique structure for the shaped charge allows the formation of a uniquely configured jet with an alternating velocity gradient along its length. In a preferred embodiment, the velocity of material within the jet is significantly greater at two points along its length than elsewhere. As a result, the material of the jet 'bunches up' at these points, forming two bulges. The forwardmost bulge is expended as it breakes through the gun wall and travels through the borehole fluid. The second bulge grows as the jet traverses the annular space between the gun wall and the casing, providing a large diameter mass to impact the casing and form a large diameter hole therein.