128results about How to "Save effective space" patented technology

The invention relates to a radial horizontal drilling and well completion tool with super-short radius and the process, belonging to the oil exploitation industry. It adopts deflecting drilling tool and horizontal drilling tool to drill well. The deflecting drilling tool comprises guide pipe, locating drilling bit and soft drilling bar. The horizontal drilling tool comprises horizontal rotary assembly, soft drilling bar, guide pipe, bushing with concave reversing thread and convex collar. It is characterized in that on the sleeve of deflecting rotary assembly triangle padding iron is set and the tail of deflecting rotary assembly is connected with the soft drilling bar by nut; quick coupling matched with the horizontal rotary assembly is set on the soft drilling bar; bushing with concave reversing thread and convex collar are set at the tail pipe; each segment of soft bar is 140-150mm; outer spline is set at the front end of inner ball; inner spline is set on the body and is fixed by nut; the ball is set in ball bowl and body; each segment of soft bar can bend in 3-6: ; joint spacing of slotting steel pipe following the guide pipe is 100-110mm and the joint width is 3.5-4.0mm. the invention is provided with ultra-short radius of horizontal drilling well, high accuracy, short drilling period and high efficiency. It can be used in oil exploitation, gas and running water industries.

The invention discloses a geological structure physical simulation experiment device for an ultra-high gravity field of a large-scale centrifugal machine. A bottom plate is arranged on a hanging basket of the centrifugal machine, lead screw assemblies are installed on the bottom plate, lead screws are arranged parallel to the bottom plate, steering devices and lead screw supporting columns are fixed to the bottom plate, sliding guiding rails are arranged on the bottom plate, a motor is installed on the bottom plate, output shafts at the two ends of the motor are connected with two steering devices, the steering devices and the end parts of the lead screws are connected, a fixed baffle is in threaded connection with the lead screws and embedded in the sliding guiding rails, a detachable baffle is arranged on the lower portion of the fixed baffle, the lower end of the detachable baffle is hinged to a swing baffle through a hinge, a curved surface platform with an arc-shaped cylindrical curved surface is arranged on the bottom plate, and moving trajectories of the arc-shaped cylindrical curved surface of the curved surface platform are on the same cylindrical surface taking the rotaryshaft of the centrifugal machine as the circle center shaft when the centrifugal machine rotates and operates. The device has the advantages that a fluid body material in the experiment can be allowed to be located on the same centrifugal force equipotential surface, so that the flowing of the fluid body material caused by non-experiment power factors is prevented, the simulation errors in the prior art is eliminated, and therefore geological structure physical simulation is more accurate.

A non-excited tap-changer with shielding device for a transformer includes an upper and a lower bearing (1,2). A rotating shaft (3) passes through the upper and the lower bearing (1,2) and is connected to an insulator (5). One end of the rotating shaft is connected to an operating mechanism (4). Moving contacts (7) are mounted on the rotating shaft and fixed contacts (6) are mounted correspondingly around the moving contacts. A cylindrical shielding housing (8) is covering the circumference of the fixed contacts. Also, an insulating drum is installed inside and / or outside of the shielding housing. A shielding coil is mounted on the one end or both ends of the cylindrical shielding housing. The non-excited tap-changer is compact and the reliability is enhanced.