Charge case fragmentation control for gun survival
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-043/117
E21B-043/263
F42B-001/02
F42B-001/036
F42B-012/24
F42B-012/32
출원번호
US-0648568
(2012-12-19)
등록번호
US-10161723
(2018-12-25)
국제출원번호
PCT/US2012/070575
(2012-12-19)
국제공개번호
WO2014/098836
(2014-06-26)
발명자
/ 주소
Hales, John H.
Burleson, John
Rodgers, John P.
Glenn, Timothy S.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Richardson, Scott
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A method for forming a perforation is disclosed. The method comprises positioning a perforating gun at a desired location in the formation. The perforating gun comprises a gun body and a charge carrier. The method further comprises disposing one or more shaped charges within the charge carrier. The
A method for forming a perforation is disclosed. The method comprises positioning a perforating gun at a desired location in the formation. The perforating gun comprises a gun body and a charge carrier. The method further comprises disposing one or more shaped charges within the charge carrier. The one or more shaped charges comprise an outer case, an inner liner, and an explosive material retained between the outer case and the inner liner. The outer case of the shaped charge comprises one or more predefined fracture lines. The method further comprises detonating at least one shaped charge, wherein detonating the at least one shaped charge forms one or more perforations in the formation.
대표청구항▼
1. A perforation apparatus comprising: a perforating gun comprising a gun body and a charge carrier;a shaped charge disposed within the charge carrier, wherein the shaped charge comprises: an outer case;an inner liner;an explosive material retained between the outer case and the inner liner, wherein
1. A perforation apparatus comprising: a perforating gun comprising a gun body and a charge carrier;a shaped charge disposed within the charge carrier, wherein the shaped charge comprises: an outer case;an inner liner;an explosive material retained between the outer case and the inner liner, wherein the outer case comprises one or more predefined fracture lines and two or more predefined elements, and wherein the two or more predefined elements are coupled to one another; andan explosive load, wherein a material composition of the outer case, an orientation of the one or more predefined fracture lines, and a size of the two or more predefined elements is based on the explosive load and a size of one or more exit holes to be formed in the gun body. 2. The perforation apparatus of claim 1, wherein the one or more predefined fracture lines are the boundaries between the two or more predefined elements. 3. The perforation apparatus of claim 1, wherein the outer case is formed by a process selected from a group consisting of machining, molding, hot isostatic pressing, brazing, encapsulating, compositing, bonding, forging, sintering and laser depositing. 4. The perforation apparatus of claim 1, wherein the outer case comprises at least one of an aluminum alloy, a steel alloy, a copper alloy, a zinc alloy, a nickel alloy, a tungsten alloy, a ceramic, and a combination thereof. 5. The perforation apparatus of claim 1, wherein the outer case further comprises one or more grooves, and wherein the one or more predefined fracture lines are stress concentrations formed by the one or more grooves. 6. The perforation apparatus of claim 5, wherein the one or more grooves are machined grooves, wherein the machined grooves are formed by a material removal process. 7. The perforation apparatus of claim 6, wherein the material removal process is selected from a group consisting of cutting, chemically etching, laser ablating, abrasive jet cutting and eroding. 8. The perforation apparatus of claim 5, wherein the one or more grooves are molded grooves, wherein the molded grooves are formed by a material forming process, and wherein the material forming process is selected from a group consisting of molding, forming, pressing and forging. 9. The perforation apparatus of claim 1, wherein the outer case comprises a composite. 10. The perforation apparatus of claim 9, wherein the composite further comprises a metal matrix. 11. The perforation apparatus of claim 10, wherein the metal matrix comprises at least one of zinc, tungsten, metal alloys, or a combination thereof. 12. The perforation apparatus of claim 10, wherein the metal matrix comprises elongated fibers of at least one of glass, carbon, Kevlar, or a combination thereof. 13. The perforation apparatus of claim 9, wherein the composite further comprises a ceramic matrix. 14. A method for forming a perforation comprising the steps of: positioning a perforating gun comprising a gun body and a charge carrier at a desired location in the formation;disposing one or more shaped charges within the charge carrier, wherein the one or more shaped charges comprise: an outer case;an inner liner;an explosive material retained between the outer case and the inner liner, wherein the outer case comprises one or more predefined fracture lines; andan explosive load;detonating at least one shaped charge, wherein detonating the at least one shaped charge forms one or more predefined fragments and one or more exit holes in the gun body, wherein the one or more predefined fragments are coupled to one another and are larger than the one or more exit holes; andretaining the one or more predefined fragments in the gun body, wherein a material composition of the outer case, an orientation of the one or more predefined fracture lines, and a size of the one or more predefined fragments are based on the explosive load of the shaped charge and a size of the exit holes to be formed in the gun body. 15. The method of claim 14, wherein detonating the at least one shaped charge forms one or more perforations in the formation. 16. The method of claim 15, wherein the one or more predefined fragments are defined by the predefined fracture lines of the shaped charge. 17. The method of claim 15, wherein impact forces on an inner wall of the gun body are minimized in part due to the size of the one or more predefined fragments. 18. The method of claim 15, wherein a pressure rise in the perforating gun is controlled in part by a size of the one or more predefined fragments. 19. A method for forming a perforation comprising the steps of: positioning a perforating gun comprising a gun body and a charge carrier at a desired location in the formation;disposing one or more shaped charges within the charge carrier, wherein the one or more shaped charges comprise: an outer case;an inner liner;an explosive material retained between the outer case and the inner liner, wherein the outer case comprises one or more predefined fracture lines; andan explosive load;detonating at least one shaped charge, wherein detonating the at least one shaped charge forms one or more perforations in the formation, one or more predefined fragments, and one or more exit holes in the gun body; andselecting a material composition of the outer case, an orientation of the predefined fracture lines, and a size of the predefined fragments based on the explosive load of the shaped charge and a size of the exit holes in the gun body.
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이 특허에 인용된 특허 (3)
William R. Collins ; David J. Leidel ; Jerry L. Walker ; Nathan Clark ; James M. Barker, Oilwell perforator having metal loaded polymer matrix molded liner and case.
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