Abstract: Provided is a two-stage reverse-torque bent screw orientation tool. An existing bent screw orientation technology has the technical problems of large friction resistance, difficult control of a borehole track, a low drilling speed and the like, and restricts economic, safe and long-acting development of oil and gas. In order to solve the above problems, the two-stage reverse-torque bent screw orientation tool is invented and composed of a first-stage clutch mechanism and a second-stage clutch mechanism, and the first-stage clutch mechanism and the second-stage clutch mechanism are both composed of a battery, a battery compartment, a pressure sensor, an electromagnetic valve, a body, a plug, a piston, an outer tooth cylinder, an inner tooth cylinder, a transmission cylinder, a connecting cylinder, a bearing, a limiting cylinder, a lower joint, a thrust bearing, a battery compartment, a circuit board, a cover plate and the like.

Abstract: Disclosed are a wireless remote control method and system for controllable rotary sliding guiding drilling. An upper end of a controllable rotary sliding guiding drilling mechanism is provided with a drill rod; and the wireless remote control system for controllable rotary sliding guiding drilling further comprises: an MWD arranged at a lower end of the controllable rotary sliding guiding drilling mechanism; a bent screw drill tool mounted at a lower end of the MWD; a drill bit mounted at a lower end of the bent screw drill tool, the drill bit being connected with the bent screw drill tool through a connector; and a clutch module mounted on the controllable rotary sliding guiding drilling mechanism, the clutch module comprising an electromagnetic valve, a processor, an internal pipe pressure sensor, an external pipe pressure sensor and a wireless data transmission module.

Abstract: Provided is a preparation method for brivaracetam. The method has a synthetic route as shown below.

Abstract: Provided is a preparation method of losartan, which is prepared by reacting a cyano group-containing intermediate represented by formula (I) with an azide reagent in toluene in the presence of a catalyst; wherein, after the reaction is completed, azide ions are removed by means of the following process: adding water to divide the reaction system into three layers, separating the intermediate layer and adding n-butanol to the intermediate layer for dilution, and adding triphenylphosphine to the resulting diluted solution so as to remove residual azide ions from the diluted solution. The preparation method provided by the present invention does not need to use sodium nitrite, thus fundamentally eliminating the formation of genotoxic impurities nitrosamines.

Abstract: The present application relates to a steel for grade R6 offshore mooring chain for use in anchoring and mooring floating bodies with cathodic protection: the chemical composition are C 0.18˜0.24%, N 0.006˜0.024, P 0.005˜0.025, S?0.005, Si 0.15˜0.35, Mn 0.20˜0.40, Cr 1.40˜2.60, Ni 0.80˜3.20, Mo 0.35˜0.75, Cu?0.50, Al?0.02, Ti?0.005, V 0.04˜0.12, Nb 0.02˜0.05, Ca 0.0005˜0.004, O?0.0015, H?0.00015, the balance is Fe: the total content of alloy ?M=(Si+Mn+Cr+Ni+Mo+Cu), 3.4<?M?6.8; the total content of microalloy ?MM=(Ti+Al+Nb+V), 0.065??MM?0.194. The corrosion potential is adjusted to prevent hydrogen embrittlement caused by cathodic overprotection on the basic premise of maintaining the strength, toughness and low corrosion rate of the steel.

Abstract: The present invention discloses a method for preparing an anti-heart-failure medicine LCZ696. The preparing method comprises the following step (formula (I)): in an organic solvent, a Sacubitril dicyclohexylamine salt reacts with valsartan under the effect of a sodium hydroxide aqueous solution, and the anti-heart-failure medicine LCZ696 is obtained. The preparing method of the present invention is simple in process and omits the procedures of ion exchange from a sodium salt to a calcium salt and hydrochloric acid dissociation in an existing production process, residues of calcium ions are avoided, and the production efficiency is effectively improved.

Abstract: The present invention discloses a method for preparing an anti-heart-failure medicine LCZ696. The preparing method comprises the following step (formula (I)): in an organic solvent, a Sacubitril dicyclohexylamine salt reacts with valsartan under the effect of a sodium hydroxide aqueous solution, and the anti-heart-failure medicine LCZ696 is obtained. The preparing method of the present invention is simple in process and omits the procedures of ion exchange from a sodium salt to a calcium salt and hydrochloric acid dissociation in an existing production process, residues of calcium ions are avoided, and the production efficiency is effectively improved.

Abstract: Described are tray table assemblies comprising a table body including a frame. The frame is formed of an upper bar and a lower bar that connect a pair of slide guides, wherein the upper bar, the lower bar, and the pair of slide guides are integrally formed as a single piece.

Abstract: Described are tray table assemblies that include a tray table (26) and at least one tray table arm (24) pivotally coupled to the tray table proximate a pivot location (22). As examples, the tray table is configured to stow within a stowage compartment, and the tray table arm is pivotally coupled to the stowage compartment proximate a second pivot location. A torque insert (12) is positioned within the one or both pivot locations.

Abstract: Described are tray table assemblies comprising a table body including a frame. The frame is formed of an upper bar and a lower bar that connect a pair of slide guides, wherein the upper bar, the lower bar, and the pair of slide guides are integrally formed as a single piece.