35results about How to "Effective displacement" patented technology

The invention relates to bridging leaking stoppage slurry and a preparation method thereof, and belongs to the field of petroleum drilling leaking stoppage. The bridging leaking stoppage slurry is prepared from the following components in parts by weight: 100 parts of water, 1-3 parts of gel, 4-15 parts of an inorganic granular material, 2-8 parts of a plant hard shell material, 0.5-5 parts of petroleum-swelling resin, 1-4 parts of mineral fibers, 1-4 parts of a flaky material, and 4-10 parts of a powder material. The leaking stoppage slurry is prepared from the gel and a bridging material, and the gel has the characteristics that a cross-linking reaction can be carried out at a high temperature, and the viscosity is quickly increased; the adopted bridging material has the characteristicsthat the particle diameter of particles is reasonable, and a leaking channel can be effectively blocked; by cooperating with bentonite slurry, the leaking stoppage slurry can effectively block a leaking layer, with asphalt cracks, of 1-5 mm, asphalt can be effectively displaced, the displacement rate of the asphalt reaches 80% or above, a blocked layer with the strength being lager than 8 MPa is formed, and temperature resistance reaches 120 DEG C or above; and the preparation method is simple, and on-site operating is easy.

The invention provides a method for improving the oil recovery rate by water injection with small pressure difference at multiple distribution points. The method for improving the oil recovery rate bythe water injection with the small pressure difference at the multiple distribution points comprises the steps that 1, an injection-production well group is selected; 2, the conceptual model of one-injection-two-recovery is established by numerical simulation, a P1 well and a P2 well are included, and quantitative research and analysis are carried out on production and injection proration; 3, inthe case of fixed water injection rate of the wells, the reasonable fluid amount of before water breakthrough is optimized; 4, the optimized fluid amount after the water breakthrough is calculated; 5,the water injection rate of the wells is reset, and the reasonable fluid production rate of the P1 well and the P2 well is optimized. According to the method for improving the oil recovery rate by the water injection with the small pressure difference at the multiple distribution points, effective displacement is expanded, every water injection interval exerts maximum potential, at the same time,the formation energy can be reasonably replenished, broad prospects in application popularization are achieved, and significant economic and social benefits can be obtained.

The invention relates to a power generating device, and provides a human gait energy-conversion power generating device which is free of maintenance, is low in cost, is safe and environmentally-friendly, can automatically acquire human gait energy and can convert the human gait energy into current, and provides energy to wearable power consumption equipment. The human gait energy-conversion power generating device comprises a housing, an electromagnetic induction coil arranged in the housing, permanent magnets and a rectifying buffer chip connected with the electromagnetic induction coil; the permanent magnets comprise a positioning permanent magnet and a suspending permanent magnet; a central guide rail is arranged on the housing; the positioning permanent magnet is arranged at the fixed end of the central guide rail in a sleeved mode; the suspending permanent magnet is arranged at the free end of the central guide rail in the sleeved mode; the opposite surfaces of the positioning permanent magnet and the suspending permanent magnet are magnetic surfaces; through the positioning permanent magnet, the suspending permanent magnet is suspended at the free end of the central guide rail; when the suspending permanent magnet has vibration, the suspending permanent magnet can move up and down along the central guide rail; and the suspending permanent magnet is positioned in the electromagnetic induction coil.

The invention provides a recovering method for improving the substrate and microfracture oil flooding efficiency in dual medium reservoir gas injection. The method comprises the following steps of: designing gas injection wells and production wells into the same target reservoir, wherein the gas injection wells and the production wells have one-to-one correspondence or one-to-multiple correspondence relationship; and then, injecting gas into the gas injection wells for recovery. The method has the advantages that the goal of effectively using rest oil in substrates and microfractures after the oil reservoir water flooding is achieved; the requirement of improving the oil flooding efficiency of the substrates and the microfractures is met; the single-well recoverable reserve scale is increased; the new well drilling investment cost is reduced; the existing underground resources can be well used; and the recovery utilization rate of the resources is improved.

The invention discloses a sweepforward front edge type side plate structure matched with a binary supersonic air inlet channel. The sweepforward front edge type side plate structure comprises a side plate, wherein the section of the side plate is defined by an upper wing contour line, a rear edge contour line, a lower wing contour line and a front edge contour line which are connected end to end;the upper wing contour line, the rear edge contour line and the lower wing contour line are determined by profile parameters of the air inlet channel; the front edge contour line has a sweepforward angle, and the lower side edge of the sweepforward angle coincides with a shock wave line generated by a last-stage compression inclined plate under the condition of the highest flight Mach number. According to the sweepforward front edge type side plate structure, the air inlet channel/airframe integrated design is considered, and the sweepforward front edge type side plate structure is used, thusthe transverse overflow effect caused by the transverse pressure gradient in front of a lip can be weakened, so that the flow capture coefficient is increased, further the transverse pressure difference between the compression inclined plate and the outer side of the machine body can be used for effectively moving a boundary layer of the airframe and the compression inclined plate, the total pressure of airflow captured by the air inlet channel is increased, the internal flow quality of the air inlet channel is improved, and the starting capacity of the air inlet channel is guaranteed.

The invention relates to a mud turning airing device. The device comprises a spiral float bowl, a scraper bucket, a ship body, an engine, a transmission mechanism and a digging bucket. The mud turningairing device has the benefits as follows: 1, when in use, the mud turning airing device can travel forwards or backwards in the mud or water along the axis of the spiral float bowl or in the direction being perpendicular to the axis of the spiral float bowl, and as functional accessories such as a push sholver and a digging hook are additionally arranged, the mud turning airing device can be extensively applied to the mud turning airing, drainage treatment, reservoir area emergency repairing fields and the like; and 2, when being applied to mud turning airing, the mud turning airing device can travel randomly in the tailings mud to cut through the tailings mud and help guide the flow of the tailings mud, can further prevent the tailings mud from crusting and turn the tailings mud to be aired, to be specific, the scraper bucket and the digging bucket are utilized to shovel, dig and rake the tailings mud to enable the tailings mud to be aired, solidified quickly and transferred effectively, so that not only are the construction and application of tailings mud storage areas greatly reduced, but also great disasters and loss caused by unexpected accidents of tailings mud ponds to theindustrial and agricultural production and downstream people's lives and properties are further reduced.

The invention relates to a self-adaptive separated layer water injection regulation and control valve. The regulation and control valve comprises a mounting short joint, wherein the outer side walls of two ends of the mounting short joint are provided with external threads, mechanical packers are respectively in threaded connection with two ends of the mounting short joint, four water injection valve bodies are symmetrically welded to the outer side walls of the mounting short joint, a semispherical cavity is formed in each water injection valve body, and the water injection valve bodies comprise pistons; four through holes are symmetrically formed in the outer side walls of the mounting short joint and are in positional correspondence with water inlet mouths, and the water injection valve bodies are communicated with the cavities of the mounting short joint; one end of a piston guiding track is welded to the middle of a base, the piston is in sleeved connection with the piston guiding track, a piston spring is arranged between the piston and the base and is in sleeved connection with the piston guiding track, and the sector of the piston is matched with the semispherical cavities; and threads are formed at the edges of the semispherical cavities of the water injection valve bodies, the edge of the base is provided with external threads, and the base is in threaded connection with the semispherical cavities.

The invention discloses a hypersonic bump compression profile inverse design method based on a curved cone precursor. The method comprises the following steps: 1) specifying a full-three-dimensional precursor shock wave curved surface according to the overall design requirement of a hypersonic aircraft; 2) dispersing the full-three-dimensional precursor shock wave curved surface into a series of precursor shock wave curves in a reference plane, and solving a corresponding flow field and a curved cone precursor compression surface by utilizing a bending shock wave theory; 3) taking an air inletlip as an input condition, and specifying a full-three-dimensional bump shock wave curved surface matched with the air inlet lip; wherein the intersecting line of the full-three-dimensional bump shock wave curved surface and the curved cone precursor compression surface obtained in the step 2) is the front edge profile line of the bump compression profile surface; and 4) dispersing the full-three-dimensional bump shock wave curved surface and the bump compression profile front edge molded line in a reference plane form, and solving by utilizing a bending shock wave theory to obtain a reference flow field and a bump compression profile line in the reference plane, and combining all the bump compression profile lines in the reference plane to obtain the hypersonic bulge compression profilebased on the curved cone precursor.

The invention discloses an old goaf coal bed gas ground extraction oxygen-consuming microorganism fire preventing and extinguishing system and method. The old goaf coal bed gas ground extraction oxygen-consuming microorganism fire preventing and extinguishing system and method are characterized in that microorganisms with high oxygen consumption and strong viability are cultured through a microorganism culture device, then an extraction pipe, a nitrogen injection pipe, a liquid extraction pipe and a culture solution injection pipe are put down through a multi-branch well, the microorganisms and nitrogen mixed air prepared by a nitrogen making device are injected into old goaf through the nitrogen injection pipe, a microorganism culture solution is injected into the old goaf through the culture solution injection pipeline, after 120 hours and after the oxygen content in the to-be-detected old goaf reaches 10% or below, mine well water and the microorganism culture solution are extracted through the liquid extraction pipe, and then coal bed gas is extracted through the extraction pipe; and in the extraction process, the content of index gas in the old goaf is monitored in real time through a sensor. According to the system, before the coal bed gas is extracted, the oxygen content in the old goaf is rapidly consumed through the high-oxygen-consumption microorganisms, so that coal oxidation spontaneous combustion or gas explosion accidents in the coal bed gas extraction process are effectively prevented, and therefore safe extraction of coal bed gas resources in the old goaf is achieved.

The invention discloses a multifunctional lithium battery solar energy street lamp. The solar street lamp comprises an intelligent movable adjusting and controlling device, mounting frames, a movablerod, a solar panel, a hook frame, a lampshade, an illuminating lamp and a fixing rod, the fixed rod is vertically installed on the upper side surface of the intelligent movable adjusting and controlling device and is formed an integrated structure in a welding mode, the movable rod is an extension of the vertical axis of the fixed rod, the movable rod and the fixed rod form an integrated structurethrough fitting installation, the mounting frames are located on the outer side surface of the movable rod and are formed an integrated structure with the movable rod through clearance fitting installation, the solar panel is positioned on the upper side surface of the movable rod and is fixedly connected with the movable rod. The solar street lamp can be adjusted according to the intensity of the solar light, so that the device can be rotated and adjusted the solar panel according to the movement of the sun, the device can effectively displacing and telescoping the rod body, and therefore the aim of enabling the device to be more intelligent is achieved.

The invention discloses a gas injection method in a thermal recovery process. The method comprises the following steps that step one, a plurality of well groups are divided according to the total wellnumber; step two, steam injection is simultaneously carried out on all the well groups; step three, nitrogen injection is conducted on all the well groups at the same time; step four, carbon dioxideinjection is simultaneously conducted on all the well groups; step five, thermal recovery profile control system injection is conducted on all the well groups at the same time; and step six, the stepstwo to five are repeated until the oil-steam ratio is lower than a set threshold value. By combining the action mechanisms of multiple injection media and the synergistic effect of huff and puff anddisplacement, a good effect of steam injection for thick oil development is achieved.

The invention relates to the technical field of lawn trimming equipment, and discloses a walking type electric lawn mower for landscaping lawn repair. The walking type electric lawn mower comprises a rack, a driving mechanism is fixedly mounted at the top end of the rack, a walking wheel set is arranged outside the rack, a set of mounting plates is arranged on each of the two sides of the bottom end of the rack, and an output shaft of the driving mechanism is in transmission connection with a transmission shaft I through a coupler. According to the walking type electric lawn mower for landscaping lawn repair, a fixed support and a chip removal sliding groove in the fixed support are arranged, so that when the rack inclines due to potholes of a lawn, a transmission disc and a rotating component on the transmission disc can be supported in time, and the transmission disc and the rotating component cannot make contact with soil on the lawn due to inclination of the rack, therefore, roots of the lawn can be effectively protected, the roots of the lawn cannot be damaged and necrotic when the electric lawn mower is used for cutting and trimming the lawn, and the electric lawn mower is high in stability and reliability.