초록 ▼

A perforating gun apparatus includes a carrier gun body having a plurality of jet target regions. A first set of the jet target regions has a first resistance to jet penetration and a second set of the jet target regions has a second resistance to jet penetration. A charge holder is positioned withi

A perforating gun apparatus includes a carrier gun body having a plurality of jet target regions. A first set of the jet target regions has a first resistance to jet penetration and a second set of the jet target regions has a second resistance to jet penetration. A charge holder is positioned within the carrier gun body. A plurality of shaped charges is supported by the charge holder. A first set of the shaped charges is oriented to have discharge ends aligned with the first set of the jet target regions and a second set of the shaped charges is oriented to have discharge ends aligned with the second set of the jet target regions such that firing the first set of the shaped charges creates perforations having a first penetration profile and firing the second set of the shaped charges creates perforations having a second penetration profile.

대표청구항 ▼

1. A perforating gun apparatus comprising: a carrier gun body having a plurality of jet target regions, a first set of the jet target regions having a first resistance to jet penetration and a second set of the jet target regions having a second resistance to jet penetration that is different than t

1. A perforating gun apparatus comprising: a carrier gun body having a plurality of jet target regions, a first set of the jet target regions having a first resistance to jet penetration and a second set of the jet target regions having a second resistance to jet penetration that is different than the first resistance;a charge holder positioned within the carrier gun body; anda plurality of shaped charges supported by the charge holder, a first set of the shaped charges oriented to have discharge ends aligned with the first set of the jet target regions, a second set of the shaped charges oriented to have discharge ends aligned with the second set of the jet target region. 2. The perforating gun apparatus as recited in claim 1 wherein the first set of the jet target regions has recesses of a first depth and the second set of the jet target regions has recesses of a second depth that is different than the first depth. 3. The perforating gun apparatus as recited in claim 2 wherein the first depth is at least 25 percent greater than the second depth. 4. The perforating gun apparatus as recited in claim 2 wherein the first depth is at least 50 percent greater than the second depth. 5. The perforating gun apparatus as recited in claim 1 wherein the first set of the jet target regions has recesses including an insert of a first thickness and the second set of the jet target regions has recesses including an insert of a second thickness. 6. The perforating gun apparatus as recited in claim 5 wherein the first thickness is at least 50 percent greater than the second thickness. 7. The perforating gun apparatus as recited in claim 5 wherein the first thickness is at least 100 percent greater than the second thickness. 8. The perforating gun apparatus as recited in claim 1 wherein the first set of the jet target regions has recesses including an insert of a first material and the second set of the jet target regions has recesses including an insert of a second material. 9. The perforating gun apparatus as recited in claim 8 wherein the first material and the second material are selected from the group consisting of ceramics, carbides, titanium and iron based alloys. 10. The perforating gun apparatus as recited in claim 9 wherein alloying constituents of the iron based alloy are selected from the group consisting of boron, carbon, chromium, manganese, molybdenum, nickel, niobium, silicon, tungsten and vanadium. 11. The perforating gun apparatus as recited in claim 8 wherein the inserts are coupled to the carrier gun body by a process selected from the group consisting of threading, brazing, adhering, thermal spraying and welding. 12. The perforating gun apparatus as recited in claim 1 wherein the first penetration profile includes perforations having a greater depth than the second penetration profile. 13. The perforating gun apparatus as recited in claim 1 wherein the first penetration profile includes perforations having a greater entry hole diameter than the second penetration profile. 14. A perforating gun apparatus comprising: a carrier gun body having a plurality of jet target regions, a first set of the jet target regions having recesses of a first depth that provide a first resistance to jet penetration and a second set of the jet target regions having recesses of a second depth different than the first depth that provide a second resistance to jet penetration that is different than the first resistance;a charge holder positioned within the carrier gun body; anda plurality of shaped charges supported by the charge holder, a first set of the shaped charges oriented to have discharge ends aligned with the first set of the jet target regions, a second set of the shaped charges oriented to have discharge ends aligned with the second set of the jet target regions. 15. The perforating gun apparatus as recited in claim 14 wherein the first depth is at least 25 percent greater than the second depth. 16. The perforating gun apparatus as recited in claim 14 wherein the first depth is at least 50 percent greater than the second depth. 17. A perforating gun apparatus comprising: a carrier gun body having a plurality of jet target regions, a first set of the jet target regions having recesses including an insert of a first thickness providing a first resistance to jet penetration and a second set of the jet target regions having recesses including an insert of a second thickness providing a second resistance to jet penetration that is different than the first resistance; a charge holder positioned within the carrier gun body; and a plurality of shaped charges supported by the charge holder, a first set of the shaped charges oriented to have discharge ends aligned with the first set of the jet target regions, a second set of the shaped charges oriented to have discharge ends aligned with the second set of the jet target regions. 18. The perforating gun apparatus as recited in claim 17 wherein the first thickness is at least 50 percent greater than the second thickness. 19. The perforating gun apparatus as recited in claim 17 wherein the first thickness is at least 100 percent greater than the second thickness. 20. A perforating gun apparatus comprising: a carrier gun body having a plurality of jet target regions, a first set of the jet target regions having recesses including an insert of a first material providing a first resistance to jet penetration and a second set of the jet target regions having recesses including an insert of a second material providing a second resistance to jet penetration that is different than the first resistance; a charge holder positioned within the carrier gun body; and a plurality of shaped charges supported by the charge holder, a first set of the shaped charges oriented to have discharge ends aligned with the first set of the jet target regions, a second set of the shaped charges oriented to have discharge ends aligned with the second set of the jet target regions. 21. The perforating gun apparatus as recited in claim 20 wherein the first material and the second material are selected from the group consisting of ceramics, carbides, titanium and iron based alloys.