256results about How to "Simple and reliable design" patented technology

A novel drilling method for a shaft drilling machine mainly comprises a derrick and an opening-sealing flat wagon which are arranged at a well opening, and further comprises a drill rod, a flexible connector, a stable pressing device, a torque amplification driving device, a cutter head, a slag discharging system, a mud treatment station, an electric appliance cabinet, a hydraulic pressure station and a power pipeline. A main drive is arranged on the derrick, the lower portion of the main drive is connected with the drill rod, the flexible connector is arranged on the drill rod, the lower end of the drill rod is connected with the torque amplification driving device, the lower end of the torque amplification driving device is connected with the cutter head, the stable pressing device is arranged outside the torque amplification driving device; muck dug by the cutter head in a well is delivered to the mud treatment station on the ground through the slag discharging system. According to the novel drilling method for the shaft drilling machine, stability of the whole machine is increased, pressing force of equipment is improved, drilling torque is increased, construction in soft soil layers is available and construction in rock stratums of high hardness is also available, guide is more accurate, so that shaft construction efficiency can be improved, shaft construction cycle is shortened, and finished well quality is improved.

The invention relates to a locking device (10) for the locking and / or unlocking of a component essential (11) for the function of a vehicle with a casing (12), which more preferably serves for the fastening of the locking device (10) to the component essential (11) for the function and a moveable locking member (15), which can assume at least two positions, namely a locking position (Ia), in which the locking member (15) protrudes from the casing (12) through an opening (13) and is actively connected with the component essential (11) for the function and an unlocking position (Ib), in which the locking member (15) is not actively connected with the component essential (11) for the function and an arresting part (18) which in an arresting position (IIIa) arrests the locking member (150 in the locking position (ia) in the event that the locking device (10) is opened without authorization. Accordingly, it is provided according to the invention that the arresting part (18) is positively held in the arresting position (IIIa).

Hydrostatic bearings are used for drill string stabilization and bottom hole assembly steering. The hydrostatic bearings utilize an existing mud flow as the bearing fluid. For steering, the bearings may be used between movable kick pads and the formation to reduce friction. Alternatively, differential hydrostatic bearing pressure may be utilized to steer. Multi-modal (non-linear and linear) steering may be provided by selectively applying equal and unequal hydrostatic bearing pressures. The bearings can be made more tolerant of imperfections in the formation by utilizing multiple pressure pockets.