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Methods and apparatus for reducing the velocity of a rider in or on an open cockpit vehicle when the rider is thrown from the vehicle.
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| Number | Title | Issue Date |
| 7753141 | Coiled tubing drilling system A drilling rig for drilling an underground borehole (5) into a seam (4) uses coiled metal tubing (8) fed by a tractor unit (11) from a drum (7) to provide a thrust force to a drilling head. The drilling head has a bent-sub assembly... | 07/13/2010 |
| 7086470 | System and method for wellbore clearing In accordance with one embodiment, a method is provided for clearing the inside of a wellbore including inserting a wellbore clearing system into the wellbore. The wellbore clearing system includes an anchor adapted to be positioned within the wellbore, an agitator ... | 08/08/2006 |
| 6913094 | Leading body for ground drilling and ground drilling machine A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite sides of the front end of the main body. A slant-cutting section extend... | 07/05/2005 |
| 6799647 | Earth drilling and boring system 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 container that has an opening thro... | 10/05/2004 |
| 6530439 | Flexible hose with thrusters for horizontal well drilling 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 thruster couplings ha... | 03/11/2003 |
| 6227313 | Anti-torque tool 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 motor from imposi... | 05/08/2001 |
| 6158516 | Combined drilling apparatus and method 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 standing multiple joint... | 12/12/2000 |
| 4890681 | Method and apparatus for rotary power driven swivel drilling 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 horizontal bed adjacent ... | 01/02/1990 |
| 4394882 | Continuous chain bit with downhole cycling capability 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 chain cycles the chain... | 07/26/1983 |
| 4339153 | Apparatus for extending and retracting the cutter bars of a boring type mining machine 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 of drive shafts an... | 07/13/1982 |
| 4167293 | Sprocket tightener 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 fashion around the whee... | 09/11/1979 |
| 3979843 | Trenching chain with scoop members 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 faced in the directio... | 09/14/1976 |
| 3968995 | Continuous mining machine with a chain drive for the cutting head 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 flights with cutte... | 07/13/1976 |
