Geometric/mechanical apparatus to improve well perforator performance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-001/02
F42B-001/00
출원번호
UP-0277382
(2006-03-24)
등록번호
US-7600476
(2009-10-28)
발명자
/ 주소
Baker, Ernest L.
Daniels, Arthur S.
출원인 / 주소
The United States of America as represented by the Secretary of the Army
대리인 / 주소
Goldfine, Henry S.
인용정보
피인용 횟수 :
4인용 특허 :
7
초록▼
Shaped charges that generate fan-like jets can produce slotted holes in rock formations. A shaped charge includes a case having on open front end, an external surface and a longitudinal axis, all transverse cross-sections of the case being bi-symmetric; an explosive material disposed in the case, th
Shaped charges that generate fan-like jets can produce slotted holes in rock formations. A shaped charge includes a case having on open front end, an external surface and a longitudinal axis, all transverse cross-sections of the case being bi-symmetric; an explosive material disposed in the case, the case including at least one opening extending from the external surface to the explosive material for initiation of the explosive material; and a liner disposed over the explosive material; wherein a pair of substantially identical longitudinal slots are formed on the external surface, the longitudinal slots being about 180 degrees apart.
대표청구항▼
The invention claimed is: 1. A shaped perforating charge for initiating flow from a well, comprising: a case having a front portion with an open front end and a rear portion, an external surface and a longitudinal axis, all transverse cross-sections of the case being bi-symmetric; said rear portion
The invention claimed is: 1. A shaped perforating charge for initiating flow from a well, comprising: a case having a front portion with an open front end and a rear portion, an external surface and a longitudinal axis, all transverse cross-sections of the case being bi-symmetric; said rear portion shaped in the form of a truncated cone with an open front, wherein the truncation of the cone forms said closed flat end of said case, said closed flat end being parallel to the open front end of said front portion, and wherein said closed flat end has a thickness greater than the thickness of the remainder of the cone; said front portion being in the form of a cylinder, said cylinder having a front end and back end, said back end being continuously joined to the open front of said rear portion, wherein the cylinder has a thickness equal to the part of the front end of said rear portion to which it is joined; said front end of said cylinder forming said open front end of said front portion, wherein said open front end is disposed in a plane which is substantially perpendicular to said longitudinal axis; an explosive material disposed in the case, the case including a single ignition point formed by an opening within said closed flat end, extending from the external surface thereof to the explosive material for initiation of the explosive material, said opening being disposed symmetrically about said longitudinal axis; and a liner disposed within said open front end, over the explosive material, the liner being conical in shape, wherein the apex of said conical shape is aligned with the longitudinal axis of said case and pointing towards said flat end of said case; wherein a pair of substantially identical longitudinal slots are formed on the external surface, the longitudinal slots being about 180 degrees apart; whereby when the explosion is initiated, a fan-like jet will result. 2. The shaped perforating charge of claim 1 further comprising a second pair of substantially identical longitudinal slots formed in the external surface, the second pair of longitudinal slots being about 180 degrees apart. 3. The shaped perforating charge of claim 1 wherein the second pair of longitudinal slots are about 90 degrees offset from the pair of longitudinal slots. 4. The shaped perforating charge of claim 3 wherein the pair of longitudinal slots and the second pair of longitudinal slots are substantially identical and the case is quad-symmetrical. 5. A method of perforating a well, comprising: providing at least one shaped charge of claim 1; and perforating the well using the at least one shaped charge. 6. The shaped perforating charge of claim 1, wherein the shape of said liner is selected from the group consisting of bi-conical, tulip, trumpet, bell-shaped, hyperboloid, hyperbolic-paraboloid, and parabolic.
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이 특허에 인용된 특허 (7)
Walters William (Elkton MD) Summers Richard (Conowingo MD), Apparatus for dispersing a jet from a shaped charge liner via non-uniform liner mass.
Parrott, Robert A.; Denney, Janet S.; Lands, Jack F.; Fayard, Alfredo, Shaped recesses in explosive carrier housings that provide for improved explosive performance.
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