Remotely controlled decoking tool used in coke cutting operations
First Claim
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1. A system for removing coke from a coking vessel comprising:
- a coke cutting drill stem and coke cutting head including cutting nozzles and boring nozzles which includes passages through said cutting head through which fluid flows alternatively through said cutting nozzles or boring nozzles;
a flow diversion apparatus in fluid connection with said drill stem and cutting head comprising a rotatable main body coupled to flow diversion caps;
and a shifting apparatus coupled to the flow diversion apparatus which rotates the flow diversion apparatus alternatively blocks the fluid flow through one set of passages while opening the fluid flow through the other set of passages within the cutting head, wherein said shifting apparatus is actuated when fluid pressure within the drill stem and cutting head is decreased.
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Accused Products
Abstract
The present invention relates to a system that allows an operator to remotely switch between cutting and boring while removing solid carbonaceous residue from large cylindrical vessels called coke drums comprising a cutting head for ejecting high pressure fluids into the coke bed; a flow diversion apparatus; and a shifting apparatus.
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Citations
29 Claims
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1. A system for removing coke from a coking vessel comprising:
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a coke cutting drill stem and coke cutting head including cutting nozzles and boring nozzles which includes passages through said cutting head through which fluid flows alternatively through said cutting nozzles or boring nozzles; a flow diversion apparatus in fluid connection with said drill stem and cutting head comprising a rotatable main body coupled to flow diversion caps; and a shifting apparatus coupled to the flow diversion apparatus which rotates the flow diversion apparatus alternatively blocks the fluid flow through one set of passages while opening the fluid flow through the other set of passages within the cutting head, wherein said shifting apparatus is actuated when fluid pressure within the drill stem and cutting head is decreased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for removing coke from a coking vessel comprising:
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A drill stem and coke cutting drill stem and cutting head including cutting nozzles and boring nozzles which includes fluid passages through said cutting head through which fluid flows alternatively through said cutting nozzles or boring nozzles; a flow diversion apparatus in fluid connection with said drill stem and cutting head comprising a rotatable main body coupled to flow diversion caps; and a shifting apparatus coupled to the flow diversion apparatus which rotates the flow diversion apparatus via a sleeve constructed with external helical splines and vertical internal splines said internal splines functioning in sliding cooperation with a vertically splined internal post, for rotating said flow diversion apparatus. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for removing coke from a coking vessel comprising:
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means for cutting coke within a coke drum including a drill stem and cutting head comprising boring means and cutting means which include fluid passages communicating within said cutting head; means for diverting flow of fluid exclusively into said boring means or exclusively into said cutting means; and means for remotely shifting said diverting means between cutting and boring modes. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A method for remotely switching between cutting and boring while removing coke from a coking drum comprising:
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allowing fluid to enter a cutting head; preventing said fluid from being ejected through cutting nozzles, where in said blocking is accomplished by utilizing a flow diversion apparatus; ejecting high pressure fluid from a boring nozzle coupled to said cutting head; decreasing flow of fluid to the cutting head; allowing force applicator to move a shifting apparatus vertically upward; allowing vertical motion of shifting apparatus to rotate said flow diversion apparatus, wherein said flow diversion apparatus subsequently prevents high pressure fluid from reaching the boring nozzles; increasing the flow of fluid to the cutting head; ejecting high pressure fluid form a cutting nozzle coupled to said cutting head.
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Specification