Explosive tubular cutter and devices usable therewith
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-001/028
E21B-029/02
출원번호
US-0537817
(2014-11-10)
등록번호
US-9574416
(2017-02-21)
발명자
/ 주소
Wright, David C.
Kenny, John J.
Siggers, David
출원인 / 주소
Wright's Well Control Services, LLC
인용정보
피인용 횟수 :
1인용 특허 :
18
초록▼
Explosive cutter assemblies and methods include a liner having a single unitary body, and an explosive charge disposed within the liner. The explosive charge includes a continuous unitary body of explosive material having a first area disposed in association with an inner surface of the liner and a
Explosive cutter assemblies and methods include a liner having a single unitary body, and an explosive charge disposed within the liner. The explosive charge includes a continuous unitary body of explosive material having a first area disposed in association with an inner surface of the liner and a second area extending from the center of the assembly to the first area. A detonator can be used to ignite the second area of explosive material, causing propagation of a detonation to the first area, which in turn causes deformation of the liner and projection of the liner toward a target to form a cut. An adaptor sub having a detonator within can be inserted into the cutter assembly to secure the assembly together, position the detonator in association with the explosive material, and engage a conduit usable to raise and lower the cutter assembly and transmit a detonation signal.
대표청구항▼
1. An explosive cutter assembly comprising: a housing assembly comprising an upper plate and a lower plate, wherein the upper and lower plates each comprise a flat surface positioned parallel relative to each other, a vertical surface extending in a transverse relationship to the flat surface, and a
1. An explosive cutter assembly comprising: a housing assembly comprising an upper plate and a lower plate, wherein the upper and lower plates each comprise a flat surface positioned parallel relative to each other, a vertical surface extending in a transverse relationship to the flat surface, and a diagonal surface adjacent to the vertical surface;a circular liner comprising an upper diagonal liner section, a lower diagonal liner section, and a vertical liner section positioned between the upper and lower diagonal liner sections, wherein the circular liner comprises a single-piece construction; andan explosive charge comprising a main charge and a detonation disc, wherein the main charge is positioned between the circular liner and the vertical and diagonal surfaces of the upper and lower plates, wherein the detonation disc is positioned between the flat surfaces of the upper and lower plates, and wherein the explosive charge comprises a single-piece construction. 2. The cutter assembly of claim 1, wherein the upper and lower diagonal liner sections comprise a truncated conical shape oriented apex to apex, wherein the vertical liner section comprises a cylindrical shape. 3. The cutter assembly of claim 1, wherein the upper and lower diagonal liner sections comprise a first length, wherein the vertical liner section comprises a second length, and wherein the first length and the second length are substantially equal. 4. The cutter assembly of claim 1, wherein the main charge comprises a vertical main charge section extending in a transverse relationship to the detonation disc, and wherein the main charge further comprises diagonal main charge sections extending from the vertical main charge section. 5. The cutter assembly of claim 1, wherein the main charge adheres to the circular liner. 6. The cutter assembly of claim 1, wherein the main charge is at least twice as thick as the detonation disc. 7. The cutter assembly of claim 1, wherein the lower plate extends about the outer surface of the circular liner to define a standoff space for the formation of the liner jet. 8. The cutter assembly of claim 1, wherein the upper and lower plates comprise a thicker construction adjacent to the main charge and a thinner construction adjacent to the detonation disc. 9. The cutter assembly of claim 1, wherein the main charge is compressed against the circular liner resulting in a physical bond therebetween. 10. The cutter assembly of claim 1, wherein edges between vertical surfaces and the flat surfaces of the upper and lower plates are truncated. 11. The cutter assembly of claim 1, further comprising a threaded adapter extending through an aperture at an axial center of the housing assembly, wherein the threaded adapter is maintained in position by a member threadedly engaged therewith. 12. The cutter assembly of claim 1, further comprising a detonator adapter protruding through the upper and lower plates at their axial centers, wherein the detonator adapter is configured to retain therein a detonator charge, booster charge, blasting cap, or combinations thereof, wherein the detonator adapter comprises a bore extending along a longitudinal axis thereof, and wherein the detonator adapter is configured to connect to a wireline, a cable, a tubular string, or other means for transporting the cutter assembly within a tubular or other object to be severed. 13. The cutter assembly of claim 12, wherein the bore of the detonator adapter is configured to position a detonator charge, a booster charge, a blasting cap, or combinations thereof at a vertical center of the detonation disc. 14. The cutter assembly of claim 13, wherein the detonator adapter further comprises: a generally cylindrical body extending through the housing assembly; andat least one threaded member connectable about the generally cylindrical body, wherein the threaded member retains the generally cylindrical body in position within the explosive cutter assembly. 15. The cutter assembly of claim 14, wherein the at least one threaded member comprises an upper threaded member and a lower threaded member configured to adjustably maintain the detonator adapter in selected position relative to the explosive cutter assembly. 16. The cutter assembly of claim 15, further comprising an upper external threaded portion and a lower external threaded portion, wherein the upper threaded member engages the upper external threaded portion, wherein the lower threaded member engages the lower external threaded portion. 17. An explosive cutter comprising: an upper plate comprising an upper flat surface;a lower plate comprising a lower flat surface, wherein the upper and lower flat surfaces are facing each other and are parallel to each other;a liner comprising three liner sections connected to each other and oriented at selected angles relative to each other, wherein the liner comprises a unitary construction; andan explosive charge comprising a main charge and a detonating charge, wherein the main charge comprises three main charge sections having a generally uniform thickness and oriented at the selected angles relative to each other, wherein the selected angles between the three liner sections and between the three main charge sections are essentially the same, wherein the explosive charge comprises a unitary construction, wherein the main charge adheres to the liner, and wherein the detonating charge comprises a generally flat configuration. 18. The explosive cutter of claim 17, wherein the detonating charge is thinner than the main charge, wherein the detonating charge is positioned between the upper flat surface of the upper plate and the lower flat surface of the lower plate. 19. The explosive cutter of claim 17, wherein a middle liner section extends vertically, wherein an upper liner section extends outwardly from the top edge of the middle liner section, and wherein the lower liner section extends outwardly from the bottom edge of the middle liner section. 20. The explosive cutter of claim 19, wherein the upper plate further comprises an upper vertical surface positioned against the middle main charge section and an upper diagonal surface positioned against the upper main charge section, and wherein the lower plate further comprises a lower vertical surface positioned against the middle main charge section and a lower diagonal surface positioned against the lower main charge section.
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이 특허에 인용된 특허 (18)
Owen Harrold D. (Forth Worth TX), Apparatus for cutting pipe.
Welch Brendan M. ; Lucca Frank J. ; Toro Daniel A. ; Bahr Lyman G., Booster explosive devices and combinations thereof with explosive accessory charges.
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