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:
Jul. 12, 1988
Filed:
Dec. 15, 1986
Emmet F Brieger, Nogal, NM (US);
Other;
Abstract
A perforation apparatus is coupled to a tubing string and is eccentrically positioned in a casing in a well bore by eccentering devices so that annular sealing rings along the length of the apparatus sealingly engage the casing. Shaped charge devices are arranged in pairs so that a pair of shaped charges produces, when detonated, a horizontal and an inclined perforation which intersect in the earth formations behind the casing. One of the perforations extends through a sealing ring to the interior of the perforating apparatus and one of the perforations opens to the casing. By applying differential pressure between the fluid in the casing and the inside of the tubing, for example by running the tubing dry, hydraulic jetting of fluid is produced in one perforation with a fluid return though the other perforation to the tubing string. Thus the penetrations of the shaped charge jet and the hydraulic jet are additive, and the perforation tunnel into the formation is washed free of shaped charge debris and compaction. Numerous perforations can be thus produced simultaneously. With the tool left in place during injection or production, the perforations can be reworked repeatedly by hydraulic jetting.