De-coking tool

• US 20040238662A1
• Filed: 07/15/2004
• Published: 12/02/2004
• Est. Priority Date: 07/23/2001
• Status: Active Grant

• Current Assignee: Ruhrpumpen GmbH (Industrias EG SA de CV)
• Original Assignee: Ruhrpumpen GmbH (Industrias EG SA de CV)
• Inventors: Paul, Wolfgang
• Granted Patent: US 7,163,165 B2
• Time in Patent Office: Days
• US Class Current: 241/1
• CPC Class Codes: B08B 9/0936 using rotating jets
• CPC Class Codes: C10B 33/006 Decoking tools, e.g. hydraulic coke removing tools with boring or cutting nozzles

Abstract

The invention relates to a tool for disintegrating coke, having a housing attached to a drill stem in operation, and at which or in which at least one nozzle for cutting and a nozzle for drilling of coke and at least one valve for closing and opening the nozzles is arranged, wherein said tool is adapted to have two different operating states and wherein said at least one valve closes off said cutting nozzles in the drilling operating state, while the drilling nozzles are closed off by said at least one valve in the cutting operating state, and wherein said housing, said valve and said nozzles are adapted so that water may flow unhindered from said drill stem through said housing and said valve and through the nozzles not closed off by said valve, characterized in that the nozzles to be closed, depending on each chosen operating state, are closed off by the balls of a ball valve. The invention further relates to a tool, wherein the arrangement for operating the valve is arranged above the nozzles.

Claims

1. A tool for disintegrating coke, having

a housing attached to a drill stem in operation, and at which or in which

at least one nozzle for cutting and a nozzle for drilling of coke and at least one valve for closing and opening the nozzles is arranged, wherein said tool is adapted to have two different operating states and wherein said at least one valve closes off said cutting nozzles in the drilling operating state, while the drilling nozzles are closed off by said valve in the cutting operating state,

and wherein said housing, said valve and said nozzles are adapted so that water may flow unhindered from said drill stem through said housing and said valve and through the nozzles not closed off by said valve,

characterized in that

the nozzles to be closed, depending on each chosen operating state, are closed off by the balls of a ball valve.

2. The tool of claim 1, characterized in that said balls (28) are spherically formed at least in sections.

3. The tool of claim 2, characterized in that said balls (28) have at least two spherical surface sections.

4. The tool according to claim 1, characterized in that said balls (28) are symmetrical.

5. The tool of claim 1, characterized in that said balls (28) are held in position by a spring (30).

6. The tool of claim 1, characterized in that said balls (28) of said ball valve (10) engage means (32) for guiding.

7. The tool of claim 6, characterized in that said means for guiding said balls (28) of said ball valve (10) are concave shells (32) embracing said balls (28).

8. The tool of claim 1, characterized in that said valve (10) engages means (54) for operating said valve, in particular for switching over from a first operating state to a second operating state.

9. The tool of claim 8, characterized in that said means (32) for guiding said balls (28) have a guide (34) engaging means (54) for operating said valve (10).

10. The tool of claim 1, characterized in that said valve carrier (16) is arranged in said housing (4), and between said housing (4) and said valve carrier (16) there is a gap (66), wherein said gap (66) is in flow communication with said interior cavity (52) of said tool.

11. The tool of claim 1, characterized in that at least two nozzles (6) for cutting are inserted in bores (40) and at least two bores (36) are arranged in the web (26) of a valve carrier (16) of said valve (10), and in that these bores (36) are blocked by said balls (28) when said tool (2) is in said cutting operating state, and said bores (40) are blocked by said balls (28) when said tool (29) is in a drilling operating state.

12. The tool of claim 11, characterized in that said at least two nozzles (6A, 6B) are arranged one on top of the other.

13. The tool of claim 1, characterized in that said tool comprises means (54) for operating said valve (10), wherein said means (54) are arranged between said nozzles (6, 8) and the top end of said tool (2).