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. 09, 1991
Filed:
Feb. 28, 1990
John C Smith, Pasadena, CA (US);
William O Jacobson, San Diego, CA (US);
Union Oil Company of California, Los Angeles, CA (US);
Abstract
The present invention achieves a more reliable multiple fracturing of a subterranean formation by inserting high pressure tubing and isolating a portion of the wellbore (including the formation of interest and an end portion of the tubing) with packers. Near the end of the tubing is a closable end and a rupturable plenum holding a sufficient volume of pressurized gas to produce a pressure ramp sufficient to cause multiple fractures in the isolated portion when the plenum is ruptured. The closable end is closed after filling the isolated portion with a fracture fluid and proppant. The rupturable means is provided by at least one rupture disc. Multiple discs can provide a step wise pressure rise ramp to tailor the multiple fracture producing pulse. By providing a known volume of pressurized gas and rupture discs, a controlled pulse loading can be achieved. Like the propellant driven pulse loading techniques, it achieves a pressure ramp, but the present invention avoids the damage potential and improves the reliability of creating multiple fractures. The present invention can also be easily modified for alternative applications and is also expected to be safe, tolerant of off-design conditions, cost effective, and efficient.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile