37results about How to "Reduce pumping pressure" patented technology

A sump for a dishwasher includes a sump case for storing washing fluid, a washing pump assembly including a flow guide to pump out the washing fluid, and a filtering assembly including a flow guide to accumulate foreign particles contained in the washing fluid during the circulation of the washing fluid. The sump includes a sump cover to cover an opening of the sump case, and a self-cleaning assembly for filtering out the foreign particles directed to the flow guide. The flow guide, the sump cover and the self-cleaning assembly are thermally bonded to form a single unit.

The invention provides an electro-hydraulic choke salvaging tool and a salvaging method, comprising a casing, the top of the casing is an upper joint for cables to pass through, and the casing is encapsulated in order from top to bottom with electronic short joints and hydraulically driven short joints. Joints and self-resetting salvage spear sub-sections, electronic sub-sections are electrically connected with hydraulic driving sub-sections, and hydraulic-driving sub-sections push the self-resetting fishing-spear sub-sections to grab the throttle through hydraulic oil. The motor is controlled by the ground controller, the motor drives the plunger pump, the plunger pump drives the push rod, and the push rod drives the fishing head until the choke is released, which effectively improves the success rate of the downhole choke salvage and can meet the requirements of the downhole choke in the gas field. The safety, reliability and low-cost salvage technology and economic requirements in the process of salvage by flow device.

The invention discloses a high-pressure washer which has the advantage of avoiding too high instantaneous water pressure so as not cause damage when a spray pipe is closed. According to the technicalscheme, a water inlet and a water outlet are formed in a high-pressure plunger pump, and a valve device is arranged on the high-pressure plunger pump. The valve device comprises a valve body and a flow limiting valve plate, and the valve body is fixedly connected with one end, close to the water outlet, of the high-pressure plunger pump. A valve chamber is formed in the valve body, and the two ends of the valve chamber are respectively connected with a connecting pipe and the water outlet. The flow limiting valve plate is arranged in the valve chamber. A cushioning cylinder body is arranged onthe valve body, and a sealed piston is arranged in the cushioning cylinder body. A connecting rod connected with the flow limiting valve plate is arranged at one end, close to the valve chamber, of the sealed piston, and the other end of the cushioning cylinder body communicates with the connecting pipe. An elastic reset piece for enabling the sealed piston to move to one end far away from the valve body is arranged on the cushioning cylinder body. A flow limiting hole is formed in the flow limiting valve plate, and the section of the flow limiting hole is trapezoidal. The two ends of the trapezoidal flow limiting hole are respectively a large bottom surface and a small bottom surface, and the small bottom surface end of the flow limiting hole is close to the cushioning cylinder body.

The invention relates to sand-free fracturing fluid with high flow conductivity as well as a preparation method, a fracturing technology and application of the sand-free fracturing fluid. The sand-free fracturing fluid comprises a group-A fracturing fluid containing a curable resin prepolymer and a group-B fracturing fluid containing a curing agent and fibers, wherein the group-A fracturing fluidand the group-B fracturing fluid are used cooperatively. The fracturing fluid prepared by the preparation method disclosed by the invention can enter all levels of fractures to form fiber enhanced porous resin to ensure that a fractured complicated fracture net system is relatively high in flow conductivity and can support the fractures, so that the oil and gas recovery rate is increased. Furthermore, the fracturing technology disclosed by the invention is simple, and the fracturing risk is reduced.

The invention provides a device for continuously injecting hot seawater to exploit seabed natural gas hydrate. The device comprises: a plurality of downwater pipes (1), the inlet end of which is arranged near the sea level, and the position of the inlet end is higher than the sea level; a plurality of heat dissipation pipes (1). 3), distributed in the seabed hydrate layer (6) in the form of a spider web or hexagonal network or branch or ring structure; at least one outlet pipe (2), the outlet end is set near the sea level, and the outlet pipe (2) The outlet end of the outlet pipe is equal to or lower than the inlet end of the downwater pipe (1); the plurality of downwater pipes (1), the plurality of cooling pipes (3) and at least one outlet pipe (2) are connected in sequence to form a connector. Making full use of the static pressure transmission principle of the connector, the high-temperature seawater on the surface of the sea surface is continuously passed through the cooling pipe laid in the hydrate layer on the seabed only by a common type of low-power centrifugal pump. The heat dissipation pipes of the present invention are arranged in a mesh structure, which can improve heat dissipation efficiency, expand heat dissipation area, and improve mining efficiency.

An oil phase for an emulsified explosive prepared by using a coal-to-oil intermediate product in a high-temperature sensitization process is composed of a coal-to-oil intermediate product, a wax material, an sp-80 emulsifier, and a polymer surfactant, and the weight ratio of the four materials is 50 ‑55: 12‑17: 18‑22: 5‑10, the four materials are metered into the mixing tank, heated, stirred and mixed for 40‑70min, and the temperature is controlled at 75±5°C to form a composite oil phase; The coal-to-liquid intermediate product is a semi-finished product in the process of coal-to-liquid production, that is, the coal-to-liquid intermediate product. The invention has the advantages that no other oil-phase materials need to be added, the performance indexes of the produced emulsion explosive can fully meet the national standards, and the product has the advantages of good fluidity, low pumping pressure and the like. The composite oil phase has high calorific value, good safety performance, convenient use, low price, wide sources of various raw materials, and high economic benefits.

The invention provides a method for pumping concrete in concrete pump truck and the device. The pumping distance of prior concrete pump truck in most construction occasions is not big but only one discharge port is set at the end of fitting pipe of arm frame in the arm frame with several decameters. So in construction all arm frames must be unfolded and by adopting high-pressure pumping, concretepasses through all fitting pipes of arm frame. Not only power is consumed and abrasion is enlarged but also efficiency and stability are decreased. Aiming at the lack of concrete pump truck existing in pumping work process, the invention provides that concrete assistant discharge device is set on the arm frame of concrete pump truck; according to the construction distance of pumping concrete fitting pipes of arm frame is switched and all or part fitting pipes of arm frame are selected to carry the construction operation of pumping concrete out. The invention can unfold proper arm frame according to the requirement and make use of corresponding fitting pipe of arm frame to construct work of pumping concrete so as to achieve purposes that the pumping pressure is decreased; energy consumptionis decreased; pipe abrasion is decreased; work efficiency and stability of pumping operation are improved.

The invention provides a ceramsite floating restraining and resistance reducing agent and a method for reducing the floating degree of ceramsite in pumped ceramsite concrete. A method for detecting the ceramsite floating index for representing the floating degree of the ceramsite is provided, a reverse vibrating treatment measure and a reverse secondary hitting method are adopted, operation is easy and fast, and the result reliability is high. According to the ceramsite floating restraining and resistance reducing agent and the method applying the ceramsite floating restraining and resistance reducing agent to reducing the floating degree of the ceramsite in the pumped ceramsite concrete, pumping resistance can be effectively lowered, the pumping and lubricating effect can be improved, the pumping speed can be increased, pumping pressure can be lowered, and the percent of the slump of the ceramsite concrete doped with the ceramsite floating restraining and resistance reducing agent to the slump of ceramsite concrete without being doped with the ceramsite floating restraining and resistance reducing agent is not lower than 90%.

The present invention relates to a method for moderately adding sand and pressurizing acid fracturing to improve the reconstruction effect of fracture-cavity reservoirs. width, take 1 / 3 of the average fracture width as the upper limit D of the proppant particle size, and measure the safe sand concentration R when the proppant particle size is D; (2) Determine the natural fractures in the target reservoir opened by acid fracturing (3) Carry out acid fracturing construction with sand and pressurization on the target reservoir. The present invention is based on the characteristics of rapid net pressure increase after adding sand in the fracture-cavity reservoir, through dynamic adjustment of the pumping program, real-time optimal scheme, after acid fracturing, the residual acid and proppant are transported to the far end of the fracture together to form a near-end acid-etched support, The remote proppant support can enhance the flow diversion capacity of the seepage channels within the acid pressure sweep range, and improve the production efficiency of fracture-vuggy oil and gas reservoirs, which has broad market application prospects.