37results about How to "Lower injection costs" patented technology

A key structure has a support member that reduces manufacturing costs, assembly costs, and the total height of the manufactured product. The support member is mounted between a base and a key cap. The support member has a first frame and a second frame, which are both formed in a united manner by injection. The first frame has a base portion and a pair of side arms connected with the base. The side arms both have a penetrated transverse pivotal hole formed therein. The second frame is disposed between the side arms and has a pair of pivots protruded respectively from two sides thereof. The pivots are formed and mounted directly in the pivotal holes during ejection molding, and an annular channel is formed for receiving a tubular mold during ejection molding.

A fuel injection device for supplying high-pressure fuel to an internal combustion engine includes a fuel supply pump, a first common rail and a second common rail. High-pressure fuel is directly supplied to the first common rail and then to the second common rail from the first common rail through a connecting passage having an orifice. The high-pressure fuel accumulated in the common rails is supplied to injectors and is injected into cylinders in a controlled manner. To suppress pressure wave propagation from the first common rail to the second common rail while providing an appropriate flow passage size, a passage diameter of the orifice is set to 0.9 mm–1.3 mm. In this manner, a pressure difference between the first common rail and the second common rail is minimized.

The invention relates to a fire-flooding exploitation method used in a later period of steam assisted gravity drainage (SAGD) of a heavy oil reservoir. At a steam chamber expansion phase of the SAGD, when steam chambers of adjacent injection and production well pairs are subjected to coalescence, a injection and production well of the middle injection and production well pair is used for injecting air to ignite, a production well of the middle well pair and production wells of the left and right adjacent well pairs are used for producing, and injection wells of the left and right adjacent well pairs are converted into fire-flooding ventilation wells. The exploitation method can utilize a high-temperature fire-flooding front edge to effectively drive remaining reserves at the lower part of an oil layer between the adjacent SAGD well pairs, avoids the steam play of in the later period of the regular SAGD or the gas-assisted SAGD, prolongs the SAGD production time, and obviously improves the oil recovery. The method disclosed by the invention combines the advantages of the SAGD and fire flooding; the output at an SAGD production phase is high, and the oil exploitation speed is high; and the fire flooding is utilized at an output declination phase after the adjacent stream cavities are subjected to the coalescence, so that the injection cost can be reduced, and the heat energy utilization rate and the oil recovery are improved.

The invention discloses a three-phase self-foaming water-plugging agent, and belongs to the field of petroleum chemistry. The provided water-plugging agent comprises the following components: solid particles, a foaming agent, a foam stabilizing agent, a crosslinking agent, a delaying agent, and a gas producing agent. Compared with the prior art, the provided water-plugging agent has the advantages of high foam quality and good stability, the gel crosslinking and gas production can be achieved at the same time, the water-plugging agent can tolerate high temperature, has a strong residue blocking performance and a long water-plugging period, and can achieve efficient plugging and depth profile control. Moreover, the preparation technology of the provided water-plugging agent is simple, the injection cost is low, and the water-plugging agent is safe and reliable, thus has a good market prospect and high economic value, and is especially suitable for the development of high temperature heavy oil steam stimulation wells.

A pneumatic needle-free injector power head, which includes a barrel, the upper part of the barrel is sealed and screwed into a cap, the lower part of the barrel is connected to a drug injection head, and a piston assembly with a reset device is installed in the inner hole of the barrel. A movable stop pin for controlling the downward movement of the plug is installed, and a sliding sleeve for controlling the movable stop pin is installed outside the cylinder, and the sliding sleeve is connected with a return spring. The small wall ball is placed in the cavity between the top of the piston assembly in the inner hole of the cylinder and the cap, and there is a slotted pointed drill fixed in the cap above the thin metal ball. This power head enables long-term storage of pneumatic needle-free syringes.

The invention discloses a manufacturing method of a composite ceramic closed impeller containing a metal framework, and belongs to the field of application of impeller wear-resistant protective coatings. The manufacturing method comprises the first step of preparation of an impeller framework, the second step of preparation of an outer diameter mold and a foaming core mold, the third step of impeller mold combining and assembling operation, the fourth step of pouring equipment connection, the fifth step of pouring material preparation, the sixth step of pouring material vacuumizing operation,the seventh step of material pouring, the eighth step of pouring material curing operation, the ninth step of mold disassembling operation and the tenth step of detail polishing operation. The vacuumizing step is carried out in the pouring material mixing process, and entrained bubbles in the pouring materials are removed before the material pouring. The two sections of processes of heating and curing are carried out after material pouring is finished, the operation difficulty of the material pouring process is reduced, waste material cleaning work is convenient, the personnel shift of the production section can be reasonably arranged, and the manufacturing method has the comprehensive advantages of simple design, stability, reliability, excellent quality and cost economy.

The invention discloses a method and a well network for improving steam assisted gravity drainage for extracting heavy oil reservoirs by the aid of solvents. The well network comprises SAGD (steam assisted gravity drainage) horizontal well pairs; horizontal sections of steam injection wells are subjected to well completion by the aid of slotted screen pipes; branched well sections are drilled in the horizontal sections of the steam injection wells and penetrate the middles of inner sandwich layers in oil layers; the various branched well sections are subjected to well completion by the aid of tail pipes; first long oil pipes which extend to toes of the steam injection wells descend into screen pipes of the steam injection wells; solvent injection main pipes which are parallel to the first long oil pipes descend into the screen pipes of the steam injection wells and are hermetically connected with the tail pipes in the various branched well sections by tail pipe hangers; second long oil pipes descend into production wells and reach the tail ends of horizontal sections of the production wells; vertical monitoring wells are further deployed in the well network. The method and the well network have the advantages that steam flows into the oil layers to upwardly develop steam cavities, and the hot solvents and steam mixed systems flow into the oil layers on the upper portions of the sandwich layers from the main pipes via the tail pipes, so that heat communication and fluid communication among the oil layers and the steam cavities can be accelerated, the sandwich layers can be forcedly broken through, development of the steam cavities on the upper portions of the sandwich layers can be promoted, and the recovery efficiency can be greatly improved.