Method and apparatus for explosive drilling utilizing spark pumps for detonating explosives专利检索-钻爆法通用采矿技术专利检索查询-专利查询网

Method and apparatus for explosive drilling utilizing spark pumps for detonating explosives

阅读：824发布：2022-05-26

专利汇可以提供Method and apparatus for explosive drilling utilizing spark pumps for detonating explosives专利检索，专利查询，专利分析的服务。并且This specification discloses combination rotary and explosive drilling methods and apparatus for drilling wellbores. Explosive charges are pumped down a drill pipe along with circulating drilling fluid and seated in a seat within a drilling tool located at the lower end of the drill pipe. The explosive charges are then detonated by means of a spark pump. The lower portion of the drilling tool is shaped as a reflector or concentrator which functions to concentrate the energy of the explosion to fragment earth formations below the drilling tool. The drill pipe is rotated, thereby rotating cutting means attached to the lower portion of the drilling tool which also fragments the earth formations below the drilling tool and keeps the wellbore in gauge. Circulating drilling fluid removes the fragmented earth formations to the surface.，下面是Method and apparatus for explosive drilling utilizing spark pumps for detonating explosives专利的具体信息内容。

权利要求

2. The package of claim 1 wherein said elongated housing is comprised of a frangible material.

3. An explosive charge to be injected along with fluid down a drill pipe located in a wellbore and adapted for seating in a drilling tool, having two electrodes, connected to the lower end of said conduit, comprising: an elongated housing having a chamber therein containing explosives, said elongated housing having a flared portion and a reduced portion extending below said flared portion; a detonating cap supported by said elongated housing having two leads in proximity to said explosives; a first conductor means for making electrical connection with an electrode in said drilling tool, said first conductor means being electrically connected to a lead of said detonating cap; and a second conductor means for making electrical connection with the other electrode in said drilling tool, said second conductor means being electrically connected to the other lead of said detonating cap.

4. An explosive drilling tool for drilling a wellbore into subsurface formations, comprising: a housing having a fluid passageway therethrough; a constriction in the lower portion of said passageway forming a seat adapted to receive an explosive package for containing explosives; spark pump means for producing electrical energy in response to applied pressure, mounted in said housing in pressure communication with said fluid passageway; electrode means in the wall of said passageway; and means for electrically connecting said spark pump means to said electrode means.

5. The explosive drilling tool of claim 4 wherein cutting means are provided on the lower portion of said housing for cutting said wellbore to gauge.

6. The explosive drilling tool of claim 5 wherein the lower portion of said housing is shaped to concentrate energy resulting from detonating explosives to drill a wellbore.

7. The explosive drilling tool of claim 6 wherein the lower portion of said housing is shaped in the form of an ellipsoidal reflector.

8. A method of drilling a wellbore through earth formations, comprising: circulating a drilling fluid down a drill pipe located in said wellbore and up the annulus formed by said drill pipe and said wellbore; circulating an explosive charge down said drill pipe; seating said explosive charge at a location adjacent the lower end of said drill pipe to restrict the flow of drilling fluid through said drill pipe whereby the pressure within said drill pipe is increased; producing electrical energy in response to the increase in said pressure; applying said electrical energy to said explosive charge whereby said explosive is detonated to create explosive energy; and concentrating said explosive energy to fragment said earth formations.

9. A combination rotary and explosive method of drilling a wellbore through earth formations, comprising: circulating a drilling fluid down a drill pipe located in said wellbore and having a drill bit with cutting means and explosive seating means attached to the lower end thereof; circulating an explosive charge down said drill pipe; seating said explosive charge on said seating means to restrict the flow of drilling Fluid through said drill pipe whereby the pressure within said drill pipe is increased; producing electrical energy in response to the increase in said pressure; applying said electrical energy to said explosive charge whereby said explosive is detonated to create explosive energy; concentrating said explosive energy to fragment said earth formation; and rotating said drill bit to cut said wellbore to gauge.

10. The method of claim 9 wherein there is sequentially circulated long an short explosive charges to fragment the wellbore bottom.

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Method and apparatus for explosive drilling utilizing spark pumps for detonating explosives

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