Drilling apparatus with down hole motor |
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| 申请号 | US28320872 | 申请日 | 1972-08-23 | 公开(公告)号 | US3854539A | 公开(公告)日 | 1974-12-17 |
| 申请人 | TIGRE TIERRA; | 发明人 | SWEENEY G; | ||||
| 摘要 | The apparatus comprises a rotary drill rod comprising an elongated pipe having a longitudinally extending bore therethrough and a percussive bit at the distal end thereof. Means define an abutment which is relatively transverse the bore adjacent the bit and operatively connected with the bit to receive and transmit hammer blows into the working face of the bit. The apparatus also comprises drive means that include a piston-like member which is retractably inserted in the bore in slidable engagement with the wall thereof and has a fluid operated hammer mechanism thereon, the hammer of which is reciprocable between the member and the abutment to apply the blows to the abutment. In addition, there are fluid transmission means for operating the hammer mechanism including means for passing fluid through the piston-like member and means for exhausting the fluid into the region adjacent the working face of the bit after the mechanism has operated. There are also means on the rod whereby the exhaust fluid can discharge from said region toward the proximal end of the pipe on the opposite side of the pipe from the piston-like member; and means on the piston-like member for generating a pressure differential across the drive means longitudinally of the bore to maintain the mechanism in operative relationship to the abutment during the application of the blows. | ||||||
| 权利要求 | 1. In combination, a rotary drill rod comprising an elongated pipe having a longitudinally extending bore therethrough and a percussive bit at the distal end Thereof, means defining an abutment relatively transverse the bore adjacent the bit and operatively connected with the bit to receive and transmit hammer blows into the working face of the bit, drive means including a piston-like member retractably inserted in the bore in slidable engagement with the wall thereof and having a fluid operated hammer mechanism thereon, the hammer of which is reciprocable between the member and the abutment to apply the blows to the abutment, fluid transmission means for operating the hammer mechanism including means for passing fluid through the pistonlike member and means for exhausting the fluid into the region adjacent the working face of the bit after the mechanism has operated, means on the rod whereby the exhausted fluid can discharge from said region toward the proximal end of the pipe on the opposite side of the pipe from the piston-like member, and means on the piston-like member for generating a pressure differential across the drive means longitudinally of the bore to maintain the mechanism in operative relationship to the abutment during the application of the blows. 2. The combination according to claim 1 wherein the abutment is disposed on the pipe. 3. The combination according to claim 1 wherein the proximal end portion of the bore is operatively fluid pressurized, and the pressure differential generating means is operative to cause a pressure drop across the drive means in the direction of the distal end of the bore. 4. The combination according to claim 1 wherein the piston-like member defines a passage for the fluid and the passage opens into the bore of the rod at the proximal end of the member. 5. The combination according to claim 1 wherein the piston-like member defines a passage for the fluid and the passage has a throttle valve therein which is biased to close the passage to fluid flow until a predetermined fluid pressure is achieved at the proximal end thereof. 6. The combination according to claim 1 wherein the hammer mechanism is interposed between the piston-like member and the distal end of the bore, in spaced relationship to the abutment and the wall of the bore. 7. The combination according to claim 1 further comprising attachment means on the proximal end of the piston-like member for releaseable engagement by a wire line retriever or the like. 8. The combination according to claim 1 wherein the bit has a greater diameter than the pipe, and the pipe forms the inner periphery of an annulus which is disposed between the pipe and the wall of the excavated hole, to pass the exhausted fluid therethrough. 9. The combination according to claim 8 wherein the pipe is rotated during the drilling operation, and the bit is engaged on the distal end of the pipe to rotate in conjunction therewith. 10. The combination according to claim 9 wherein the bit is rigidly connected to the distal end of the pipe. 11. The combination according to claim 8 wherein the bit is annular, the fluid exhaust means is operative to exhaust the fluid through the body of the bit, and the outer periphery of the bit is adapted to enable the exhausted fluid to discharge thereacross into an annulus formed by the pipe and the wall of the excavated hole. 12. The combination according to claim 1 wherein the bit is annular and the abutment takes the form of an anvil relatively reciprocably interposed in the bore between the hammer and the face of the bit to receive and transmit the blows to the bit, and wherein the fluid exhaust means is operative to exhaust the fluid through the anvil. 13. The combination according to claim 12 wherein the anvil is disposed in the pipe and slidably engaged with the wall of the bore, between the hammer and the bit. 14. The combination according to claim 1 wherein the drive means also includes an anvil relatively reciprocably interposed in the bore between the hammer and the abutment to receive and transmit the blows to the abutment. 15. The combination according to claim 14 wherein The bit is annular, and further comprising excavation means on the distal end of the anvil adjacent the inner peripheral opening of the bit. 16. The combination according to claim 15 wherein the anvil is engageable with the abutment and the excavation means is interposed between the abutment and the mouth of the opening. 17. The combination according to claim 15 wherein the excavation means is recessed and the recess is interposed between the anvil and the mouth of the opening to receive formation material through the opening. 18. The combination according to claim 15 wherein the anvil has a core barrel thereon. 19. The combination according to claim 15 wherein the excavation means is detachably connected to the anvil. 20. The combination according to claim 15 wherein the excavation means is axially and/or rotationally displaceable in relation to the anvil. 21. The combination according to claim 15 wherein the excavation means is relatively rotatably engaged with the bore of the rod. 22. The combination according to claim 15 wherein the anvil defines a passage for the fluid and the fluid exhaust means is operative to exhaust the fluid through the anvil passage. 23. The combination according to claim 22 wherein the excavation means defines a continued passage for the fluid with the rod, and the fluid exhaust means is operative to exhaust the fluid through the continued passage. 24. The combination according to claim 23 wherein the bit defines a port for the fluid through the body thereof and the fluid exhaust means is operative to exhaust the fluid through the port. 25. The combination according to claim 14 wherein the anvil is operably connected with the piston-like member and adapted to be retracted from the bore with the member. 26. The combination according to claim 25 wherein the anvil is slidably engaged with the wall of the bore. 27. Apparatus for extracting material from an earth formation, comprising a rotary drill pipe having an annular bit on the distal end thereof which is adapted to be hammered into the formation as the pipe is rotated theretoward, a core barreling tube retractably inserted in the pipe, and means for transmitting hammer blows to the bit while the bit is rotated, and retracting the tube from the pipe when the bit is idle, including an anvil retractably seated in the pipe, to be used as an abutment for a reciprocable hammer mechanism which is employed to apply the blows to the pipe, said anvil being engaged with the pipe to transmit the blows to the bit through the pipe, and operably connected to the tube so that it can retract the tube from the pipe when the bit is idle, said bit being oversized and having ports in the body thereof, said hammer being reciprocated with a compressed fluid which is exhausted about the bit to flush the cuttings from the formation around the pipe, and said apparatus further comprising means for exhausting the fluid to the ports of the bit, through the anvil, and thence between the tube and the pipe. 28. The apparatus according to claim 27, wherein the tube is slidably interposed in the pipe between the anvil and the bit, and is relatively rotatably interconnected with the anvil to remain stationary in the pipe as the pipe is rotated. 29. The apparatus according to claim 28, wherein the tube is relatively rotatably engaged with the inner peripheral opening of the bit to prevent the cuttings from escaping between the tube and the pipe. 30. The apparatus according to claim 29, wherein the tube and the pipe are interengaged with one another, to define a passage or passages to the ports of the bit, which operate to discharge the fluid into the inner peripheral opening of the bit until the tube engages with the bit, so that any cuttings therebetween can be flushed away from the area of engagement. 31. The apparatus according to claim 30, wherein the tube is slidably interconnected with the anvil, but yieldably biased in the direction away from the anvil, so that the tube will normally engage the bit, but in the presence of cuttings therebetween, will be retracted against the bias thereon, to be hammered into engagement thereafter, when the hammer mechanism is operated against the anvil. 32. The apparatus according to claim 29, further comprising means for exhausting a portion of the fluid through the tube, to prevent the cuttings from entering the tube. |
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