IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0304653
(1999-05-04)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
36 인용 특허 :
19 |
초록
▼
The apparatus is used for cutting an opening through the wall of a conduit located in a borehole traversing the subsurface formations. The apparatus includes a body adapted to be lowered into the conduit to a desired level. The body is formed by a cylindrical wall defining an elongated chamber havin
The apparatus is used for cutting an opening through the wall of a conduit located in a borehole traversing the subsurface formations. The apparatus includes a body adapted to be lowered into the conduit to a desired level. The body is formed by a cylindrical wall defining an elongated chamber having a combustible charge receiving portion and an ignition portion located close to the combustible charge receiving portion. A plurality of spaced apart apertures are formed through the wall defining a given pattern which may be at least one elongated row of apertures generally parallel with the axis of the cylindrical wall or a line which encloses a given configuration on one side of the axis. A combustible charge is located in the combustible charge receiving portion of the chamber, and an ignition device is located in the ignition portion of the chamber for igniting the combustible charge for creating a flame and hot combustion products for passage through the apertures for cutting the wall of the conduit to form an opening through the wall of the conduit. In the preferred embodiment, the combustible charge is located in the chamber above, at the level and below the apertures.
대표청구항
▼
1. An apparatus for cutting an opening through the wall of a metal conduit located in a borehole traversing the subsurface formations, comprising:a body adapted to be lowered into the metal conduit, said body comprising a surrounding wall defining an elongated chamber, a plurality of spaced apart ou
1. An apparatus for cutting an opening through the wall of a metal conduit located in a borehole traversing the subsurface formations, comprising:a body adapted to be lowered into the metal conduit, said body comprising a surrounding wall defining an elongated chamber, a plurality of spaced apart outer apertures formed through said surrounding wall along a length thereof, said surrounding wall having an inner side and a central axis, a heat shield wall located next to said inner side of said surrounding wall along said length and surrounding an inner zone, a plurality of spaced apart inner apertures formed through said heat shield wall in alignment with said plurality of spaced apart outer apertures, wherein said inner and outer apertures are located in at least one elongated row which extends generally parallel to said axis, a combustible charge located in said inner zone, and an ignition means located in said chamber close to said inner zone for igniting said combustible charge for creating hot combustion products for passage through said inner and outer apertures for forming the opening through the wall of the metal conduit. 2. The apparatus of claim 1, wherein:said combustible charge is located in said inner zone at positions above, at the level of, and below said apertures. 3. The apparatus of claim 1, wherein:the at least one elongated row comprises a plurality of elongated spaced apart rows on one side of said surrounding wall and said heat shield wall and generally parallel to said axis. 4. The apparatus of claim 3, wherein:said combustible charge is located in said inner zone at positions above, at the level of, and below said apertures. 5. The apparatus of claim 1, wherein:said surrounding wall of said body has a central axis, said inner and outer apertures define a pattern which encloses a given configuration on one side of said surrounding wall and said heat shield wall. 6. The apparatus of claim 5, wherein:said combustible charge is located in said inner zone at positions above, at the level of, and below said apertures. 7. The apparatus of claim 1, wherein:said surrounding wall has an outer side, a thin outer wall located next to said outer side of said surrounding wall and surrounding said outer apertures, said outer wall having an upper end and a lower end located above and below said outer apertures respectively, means for forming seals between said upper and lower ends of said outer wall and said outer side of said surrounding wall to prevent liquid in the borehole from entering said apertures, said flame and combustion products being capable of passing through said outer wall for forming an opening through the wall of the metal conduit. 8. The apparatus of claim 7, wherein:said outer side of said surrounding wall is cylindrical in shape having a smaller outside diameter, in the vicinity of said outer apertures, than at the positions of said seals such that a space exists between said smaller diameter portion and said outer wall. 9. The apparatus of claim 1 wherein:said surrounding wall is formed of metal, said heat shield wall is formed of a non-metallic material. 10. The apparatus of claim 9, wherein:said heat shield wall is formed of carbon. 11. A method of cutting an opening through the wall of a metal conduit located in a borehole traversing the subsurface formations of the earth, comprising the steps of:lowering into said metal conduit an apparatus comprising a surrounding wall defining a chamber having a central axis and a heat shield wall dispose proximate an interior surface of the surrounding wall, said chamber of said apparatus having a plurality of stacked combustible charges located therein and a plurality of spaced apart apertures formed through said wall of said apparatus along a line which encloses a given configuration with said charges being located in said chamber above, at the level of, and below said apertures, and igniting said combustible charges to create a flame and hot combustion products for passage through said apertures for forming an opening through the wall of the metal conduit corresponding to said given configuration. 12. A method of cutting an elongated opening through the wall of a metal conduit located in a borehole traversing the subsurface formations of the earth, comprising the steps of:lowering into said metal conduit an apparatus comprising a surrounding wall defining a chamber having a central axis, said chamber of said apparatus having a plurality of stacked combustible charges located therein and a plurality of spaced apart apertures formed through said wall of said apparatus along a generally straight line generally parallel to the axis of said wall of said apparatus, with said charges being located in said chamber above, at the level of, and below said apertures, and igniting said combustible charges above, at the level of, and below said apertures to create a flame and hot combustion products for passage through said apertures for forming an opening through the wall of the metal conduit along the line defined by said apertures. 13. An apparatus for forming an opening through a wall of a metal conduit disposed in a borehole, comprising:a body adapted to be lowered into the metal conduit, the body comprising a surrounding wall defining a chamber and having a central axis; a plurality of apertures formed through a portion of the surrounding wall along a generally straight line generally parallel to the axis of the surrounding wall; a heat shield wall located next to an interior surface of the surrounding wall; a plurality of apertures formed through the heat shield wall and aligned with the plurality of apertures of the surrounding wall; one or more combustible charges disposed within the chamber; and an ignition member for igniting the one or more combustible charges, whereby hot combustion products are formed for passage through the plurality of apertures of the heat shield wall and the surrounding wall, thereby forming the opening through the wall of the metal conduit. 14. The apparatus of claim 13, wherein the one or more combustible charges are disposed at positions above, at the level of, and below the plurality of apertures of the surrounding wall.15. The apparatus of claim 13, wherein the plurality of apertures of the surrounding wall are formed on one side of the surrounding wall.16. The apparatus of claim 15, wherein the one or more combustible charges are disposed at positions above, at the level of, and below the plurality of apertures of the surrounding wall.17. The apparatus of claim 13, further comprising:an outer wall disposed next to an exterior surface of the surrounding wall and surrounding the plurality of apertures of the surrounding wall; and a plurality of seal members disposed between the outer wall and the surrounding wall to prevent liquid in the borehole from entering the plurality of apertures of the surrounding wall, wherein the combustion products are capable of passing through the outer wall for forming the opening through the wall of the metal conduit. 18. The apparatus of claim 17, wherein the plurality of apertures of the surrounding wall are in fluid in communication with an annular space formed between the surrounding wall and the outer wall.19. The apparatus of claim 13, wherein the surrounding wall comprises a metal and the heat shield wall comprises a non-metallic material.20. The apparatus of claim 19, wherein the heat shield wall comprises carbon.21. An apparatus for cutting an opening through a wall of a metal conduit located in a borehole traversing the subsurface formations, comprising:a body adapted to be lowered into the metal conduit, said body comprising a surrounding wall along a length thereof, said surrounding wall having an inner side and a central axis, a heat shield wall located next to said inner side of said surrounding wall along said length and surrounding an inner zone, a plurality of spaced apart inner apertures formed through said heat shield wall in alignment with said plurality of spaced apart outer apertures, a combustible charge located in said inner zone at positions above , at the level of, and below said apertures, and an ignition means located in said chamber close to said inner zone for igniting said combustible charge for creating hot combustion products for passage through said inner and outer apertures for forming the opening through the wall of the metal conduit. 22. An appartus for cutting an opening through a wall of a metal conduit located in a borehole traversing the subsurface formation, comprising:a body adapted to be lowered into the metal conduit, said body comprising a surrounding wall defining an elongated chamber, a plurality of spaced apart outer apertures formed through said surrounding wall along a length thereof, said surrounding wall having an inner side and a central axis, a heat shield wall located next to said inner side of said surrounding wall along said length and surrounding an inner zone, a plurality of spaced apart inner apertures formed through said heat shield wall in alignment with said plurality of space apart outer apertures, wherein said inner and outer apertures are located in a plurality of elongated spaced apart rows on one side of said surrounding wall and said heat shield wall and generally parallel to said axis, a combustible charge located in said inner zone, and an ignition means located in said chamber close to said inner zone for igniting said combustible charge for creating hot combustion products for passage through said inner and outer apertures for forming the opening through the wall of the metal conduit. 23. The apparatus of claim 22, wherein said combustible charge is located in said inner zone at positions above, at the level of, and below said apertures.
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