42results about How to "Achieve stress relief" patented technology

The invention relates to an overall process under-balance drilling pressure compensation system and a method for oil and gas drilling, an underground casing valve (10) is connected on a superior casing string, a wellhead rotary blowout preventer (11) is arranged at an upper end of a wellhead blowout preventer group and is connected with an under-balance throttle manifold (8) through a high-pressure hose (9), a well control manifold (12) which is connected out of a normal wellhead control device by four-pass is connected with a drilling fluid continuous pouring system in parallel by two-pass; and drilling is pulled to the front of the underground casing valve (10), the drilling fluid continuous pouring system grouts, the under-balance throttle manifold (8) controls the pressure in a shaft, and the drilling fluid which is circulated out enters a normal drilling fluid circulating system. In the drilling pulling process, the drilling fluid can be continuously poured into the shaft by a ground pressure compensation system and the bottom-hole pressure can be dynamically controlled simultaneously, thus effectively preventing formation fluid from intruding into the shaft in the drilling pulling process and keeping the steady under-balance state of the shaft.

The invention discloses a stress relief blasting method based on a tunnel face notching. The method has the advantages that on the basis of a traditional notching blasting method and a traditional stress relief blasting method, the single hole arrangement is not needed, original tunneling blasting holes are subject to proper re-arrangement and deepening, and a tunnel face with an elliptical surface and an arc-shaped blasting and loosening area are blasted, so a new construction technology is formed, namely that the stress relief and the tunneling excavation are synchronously performed, and strain energy stored by surrounding rock self is sufficiently utilized; the method can be widely applied to the deep tunnel excavation in the fields of mines, water conservancy and hydropower, transportation and the like under the high ground stress condition, or the active control on strong rock blasting in the deep mining process, the rock blasting control effect is effectively improved, and the application prospect is broad.

The invention discloses a self-adaptive stress tunnel primary support steel support structure and a construction method thereof, a steel support is divided into an arch-shaped part positioned at the upper part and a support part positioned at the lower part by openings positioned at side walls at two sides, and a connecting device connected between the arch-shaped part and the support part is arranged at each opening of the steel support; the connecting device elastically supports the arch-shaped part and the supporting part in the trend of the steel supporting side wall part. The steel supporting structure has the advantages of being simple in structure, good in fitting performance, capable of achieving active supporting and avoiding sudden damage and the like, and the construction method of the steel supporting structure also has the advantages.

The embodiment of the invention discloses a steam rice cooker and a method for cooking low-sugar rice through the steam rice cooker. The steam rice cooker comprises a cooker container, a steaming rack, a boiler and an electromagnetic pump. The upper edge of the steaming rack and the inner wall of the cooker liner are sealed through a sealing ring in the cooking process; first through holes are formed in the bottom surface of the steaming rack; and a first space is formed in the steaming cavity of the steaming rack, and a second space is formed between the bottom wall of the steaming rack and the bottom wall of the inner container. The method comprises the following steps that water in the cooker container is heated; in the heating process, water vapor generated in the second space is released into the first space through second through holes; after the water is boiled, the electromagnetic pump is controlled to be started, and water is injected into the cooker container for a first preset duration so as to inject a first volume of water into the cooker container. According to the scheme of the embodiment, the rice absorbs more moisture in the cooking process of the low-sugar rice, and the problems that the rice becomes dry, half-cooked and uneven in upper and lower layers are solved.

The invention discloses a method for electrochemically thinning and polishing InP-based RFIC wafers, which includes the following steps: an InP-based RFIC wafer is cleaned; photoresist is applied on the surface of the InP-based RFIC wafer; electrode pattern photolithography is performed on the InP-based RFIC wafer; metal electrodes are produced on the InP-based RFIC wafer; the InP-based RFIC wafer is cleaned; the InP-based RFIC wafer is rapidly alloyed; photoresist is applied on the surface of the InP-based RFIC wafer; lead pattern photolithography is performed on the InP-based RFIC wafer; lead metal is produced on the InP-based RFIC wafer; the InP-based RFIC wafer is connected with wires; the InP-based RFIC wafer is electrochemically polished; the InP-based RFIC wafer is stripped off, and thereby thinning and polishing are finished. The method effectively prevents injuries caused by mechanical thinning, realizes stress release in the process of thinning and polishing and the mirror effect of the polished surface of a substrate, and provides a new solution for the problem of a thinning and polishing process for ultrathin InP.

The invention provides a method of manufacturing a shaft forging. According to the method, by strictly controlling the number, sequence, drawing ratio and upsetting ratio of drawing and upsetting in the forging process and adopting a heat treatment process of air cooling and sand cooling instead of a conventional undulation isothermal slow cooling process, the internal stress diffusion is facilitated, deformation is not easily caused, and the hydrogen amplification effect can be achieved. The shaft forging without the white point defect can be prepared without a large gas heating furnace, so that the production cost and the energy consumption are reduced, and the production efficiency is improved.

The invention discloses a light shielding layer, a composite film layer and a preparation method thereof, and relates to the technical field of radioactive element detection.The light shielding layer is prepared on the surface of a cadmium zinc telluride crystal and comprises a plurality of first light shielding layers and second light shielding layers which are alternately stacked, and the density of the first light shielding layers is larger than that of the second light shielding layers; the stress of the second shading layer is smaller than that of the first shading layer. The light shielding layer provided by the invention is formed in a mode of alternately laminating the plurality of first light shielding layers and the plurality of second light shielding layers, so that the stress release of the light shielding layer is realized, and the influence on the density of the light shielding layer is reduced to the minimum, so that the light shielding layer can be prepared under a low-temperature condition to obtain a relatively large thickness, and the light shielding property is relatively good; and the binding force with the cadmium zinc telluride crystal is high.

The invention provides a neurology diagnosis and treatment device and mainly relates to the field of diagnosis and treatment equipment. The neurological diagnosis and treatment device comprises a helmet, a plurality of circles of massage holes are formed in the inner side of the helmet; a massage head is arranged in each massage hole in a sliding manner; the massage heads are elastic massage heads; a slide way is arranged on the inner side of a part, where each circle of massage holes is formed, of the helmet; a driving ring is arranged in each sliding way; a plurality of protrusions matched with the massage heads are arranged on the inner side of each driving ring; ring teeth are arranged on the outer wall of each driving ring; driving openings communicating with the sliding ways are formed in the outer wall of the helmet; and a driving device matched with the ring teeth is arranged at the position of each driving opening in the outer side of the helmet. The massage helmet has the beneficial effects that the head of a patient can be alternately massaged through the multiple circles of massage heads mounted in the helmet, so that the massage action of the head is completed insteadof manual work, and an external treatment means with a good effect is provided for the patient suffering from neurological diseases.

The invention provides an overload and overpressure protection device of an ultrahigh pressure plunger pump. The overload and overpressure protection device comprises a connector, a rupture disk, a pressing head, a protection cover and a sealing ring, wherein outer threads are arranged at the upper end and the lower end of the outer circumference of the connector; a first through hole is formed inthe center of the connector in the axis direction; the lower surface of the rupture disk covers and presses the upper end face of the connector; the pressing head is of a round pipe structure; the lower end of the pressing head is tightly pressed on the outer edge of the upper surface of the rupture disk; the protection cover is in threaded connection to the top of the connector; the upper end ofthe pressing head is in tight pressing contact with the top of the inner side of the protection cover; the protection cover is fixed to the top of the protection cover; a gap is formed between the inner side face of the protection cover and the outer side face of the protection cover; a round groove is formed in the center of the top of the inner side of the protection cover; a plurality of second through holes are formed in the outer circumference of the upper side part of the protection cover in the circumferential direction; an annular groove is formed in the middle of the lower end face of the connector; and the sealing ring is embedded in the annular groove in a matched manner. The overload and overpressure protection device is scientific in design, easy to mount, simple in structure, large in pressure bearing and wide in overpressure range.

The invention discloses a supporting method of a swing type anti-seismic recoverable anchor rod suitable for complex slope supporting, the anchor rod structure comprises an anchoring section, a free section and an anchor head, and the anchor head comprises a base plate, a rigid sliding wall, an anchorage device, an anti-seismic device and an anchorage device lifting device. The slope supporting method comprises the following steps: 1, drilling holes; 2, loading an anchor; 3, grouting maintenance; 4, constructing a retaining wall or a surface layer; 5, mounting an anchor head; and 6, tensioning and locking. The method further comprises the step of unsealing after earthquake disasters. And resetting the anti-seismic device. The method effectively solves the problems that in a traditional slope reinforcing method, an anchor rod cannot resist earthquake loads and is damaged or failed in anchoring, so that a slope rock-soil body collapses and slides down, and the method is advanced in anti-seismic concept, excellent in anti-seismic performance and high in anti-seismic performance. The side slope supporting method of the swing type anti-seismic recoverable anchor rod is suitable for complex side slope supporting, can achieve graded anti-seismic and secondary recovery after an earthquake, and has wide application prospects and remarkable economic and social benefits.

The invention provides a semiconductor structure. Grooves located between adjacent contact pads are arranged in the semiconductor structure. The insulating filling layer filled in the groove is composed of at least two insulating parts, so that the internal stress of the insulating material in the groove can be more effectively relieved, and the problem that the adjacent semiconductor device is damaged due to the high-strength internal stress of the insulating material in the groove can be improved.