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6799647 |
The earth drilling and boring system for drilling bore holes in the earth has a drilling rig with a power source attached to a rotateable pipe container. There is a flexible drill pipe or tubing attached to end retained in the pipe conta...
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6530439 |
A flexible hose assembly for horizontal well drilling is provided. The flexible hose assembly has a number of spaced thruster couplings along its length to impart drilling force to a nozzle blaster at an end of the flexible hose. The thr...
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6227313 |
A downhole tool for engaging a borehole wall of a well, with outwardly displacing gripping elements to engage the borehole wall in such a way as to prevent rotation of the tool relative to the borehole wall, thereby preventing a downhole...
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6158516 |
Method and apparatus for drilling, completion, well workovers and well control, combining an integrated lifting unit and a coiled tubing unit, the method and apparatus permit running jointed pipe and coil tubing in combination, and stand...
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4890681 |
The power drive system of the present invention provides a rotary drive swivel unit which can be tilted along its horizontal pivotal axis until its output shaft is substantially horizontal. A drill pipe provided in a substantially horizo...
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4394882 |
A continuous chain bit for hard rock drilling is capable of downhole cycling. A drill head assembly moves axially relative to a support body while the chain on the head assembly is held in position so that the bodily movement of the chai...
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4339153 |
A self-propelled boring type mining machine includes a mobile frame and a pair of spaced apart drive shafts that extend forwardly from a gear box mounted on the frame. A pair of rotary boring heads are nonrotatably connected to the pair ...
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4167293 |
The invention concerns a machine for cutting earth formations, of the type comprising a vehicle body, and a power driven rotary cutter mounted on the body. The cutter includes a wheel assembly and a cutter chain mounted in circular fashi...
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3979843 |
A trenching chain arranged with links and pivot pins and with scoop members staggered laterally of the longitudinal direction of the chain and therealong. The scoop members have cup-shaped or curved scoop surfaces which are generally fac...
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3968995 |
A drive chain for transmitting power to a rotatable cutter head of a mining machine. The mining machine is of the type having a rotary cutter drum mounted at the forward end of the mining machine frame. The cutter drum has helical auger ...
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3710878 |
An excavator is provided with a box type casing including a pair of rotary cutters mounted on the bottom portion of the casing; blades provided at the outer periphery of the cutters provide excavating action with soil so excavated being ...
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