Paper: Tubing-Conveyed, High-Temperature, Deep Well Perforating

Previous research and publications have established that clear and effective communication between the casing and the reservoir formation is an absolute requirement for an effective oil or gas well completion." As wells are drilled deeper and casing strings become smaller, the ability of jet perforating guns to penetrate the well bore effectively is greatly reduced. In wells exceeding l&000-foot depths one or more of the following situations usually exist: 1. Combination casing strings involving small bottomhole ID 2. The necessity of using small perforating guns due to well design 3. High compressive strength rocks which decrease the penetration of jet guns 4. High bottomhole temperatures which can reduce the penetrating effectiveness or performance of the perforating gun and in some cases render it inoperable 5. Excessive completion costs due to items 1 through 4. Because of these factors, the completion of such wells successfully, safely, economically, and satisfactorily has become an ever-increasing challenge. Present completion techniques of perforating usually employ the use of a shallow penetrating jet perforating gun run on wire line. When penetration is not sufficient, hydraulic treatment is needed to complete the well. Hydraulic treatment can be costly, and in some instances, possibly damage the production zone. In a unique modification of its field-tested and proven TUBING CONVEYED Perforating Technique, Vann Tool Company has devised what is believed to be a safe, effective means of perforating deep, high-pressure wells with abnormally high bottomhole temperatures. This method is called the VANNTAGE High Temperature TUBING CONVEYED Perforating System. It is now ready for field testing.