Terry L Conner

US Patent:

20050247447, Nov 10, 2005

Filed:

May 10, 2004

Appl. No.:

10/842318

Inventors:

Roger Spring - Oklahoma City OK, US
Robert Spring - Oklahoma City OK, US
Terry Conner - Oklahoma City OK, US

International Classification:

E21B043/267

US Classification:

166055200

Abstract:

The present invention is an improvement in the design of a perforating gun to perforate the casing and rock formations in oil and gas wells. Perforating guns are cylindrical vessels with explosive charges at specified intervals designed to shoot perpendicularly outwardly through the vessel, perforating the casing and into the rock formation. As most wells are generally straight and most formations are relatively flat, the perforations are horizontal in the same direction as the bedding plane of the rock formations. The present invention is to angle the explosive charges so as to cause the perforation to shoot at an angle to horizontal and across the bedding planes of the rock formations. The angled perforations can result in improved completions in stratified reservoirs and fractured reservoirs by contacting all the stratified layers for production and contacting more of the fractures for production. Similarly, the angled perforations would contact more of the cleats in coal seams for improved production of coal be methane. Numerous other examples of reservoir conditions could make the present invention advantageous in contacting more of the formation with less perforating charges while at the same time improving production rates and long term recovery of hydrocarbons.