2669results about How to "Improve the blocking effect" patented technology

The invention discloses a fibre compound temporary plugging agent which comprises the following raw materials in parts by weight: 55-75 parts of transport fluid, 20-30 parts of temporary plugging agent grains and 0.5-2 parts of temporary plugging fibre. The transport fluid comprises the following raw materials in parts by weight: 0.2-0.6 part of guar gum, 0.1-0.5 part of sterilizing agent, 0.3-0.7 part of adhesive agent, 0.3-0.8 part of discharging agent and 0.1-0.5 part of sodium carbonate. The fibre capable of dissolving under certain conditions is added to the soluble temporary plugging agent grains. The fibre and the temporary plugging agent grains are used according to a certain proportion. The soluble fibre can form a space network structure which firmly bounds the temporary plugging grains to form an organic integrity, thereby greatly improving the intensity of the temporary plugging layer. The fibre compound temporary plugging agent has the advantages that the plugging effect is good and the plugging is easily and automatically unfastened after fracture and acidification with little hurt for the plugging layer. The success efficiency for working is obviously enhanced.

An organic light emitting diode (OLED) display includes a flexible substrate, a barrier layer disposed on the flexible substrate, and an organic light emitting diode disposed on the barrier layer. The barrier layer includes a plurality of metal layers and a plurality of insulation layers in which the metal layers and the insulation layers are alternatively stacked with each other on the flexible substrate.

The invention relates ton a variable-distribution porous end mechanical sealing structure, comprising a movable ring and a stable ring which are mechanically sealed, to form an annular sealing end. One side of the sealing end is high pressure side as ascending, while another end is low pressure side as descending, at least one sealing end is disposed with porous structure in different sizes symmetry distributed on the sealed end. Compared with present screw or groove mechanical sealing structure, the invention has better pressure resistance, abrasion resistance and better dynamic pressure effect on fluid membrane, to improve the carrier ability of fluid membrane.

The invention relates to a deformable plugging and anti-sloughing agent for drilling fluid, and the deformable plugging and anti-sloughing agent comprises 10-90 parts by weight of non-deformable material, 20-80 parts by weight of nano-scale deformable redispersible polymer and 10-60 parts by weight of natural polymer modified material. The invention further relates to a preparation method of the deformable plugging and anti-sloughing agent for the drilling fluid. The preparation method comprises the following steps: mixing all the components according to the corresponding mixture ratio, mixing by virtue of a mixing and stirring machine for 80-120 minutes and screening by virtue of a 100-300 mesh screen, thus obtaining the deformable plugging and anti-sloughing agent.

An object of the present invention is to prevent the deterioration of a TFT (thin film transistor). The deterioration of the TFT by a BT test is prevented by forming a silicon oxide nitride film between the semiconductor layer of the TFT and a substrate, wherein the silicon oxide nitride film ranges from 0.3 to 1.6 in a ratio of the concentration of N to the concentration of Si.

The invention relates to an offshore oilfield water injection well online one-step-process acidification technology, which comprises following steps of (1) preparing one-step acid liquor, wherein the one-step acid liquor consists of following components by weight percent: 20 to 40 percent of industrial acetic acid, 15 to 40 percent of industrial hydrochloric acid, 3 to 15 percent of deposition inhibitor, 5 to 15 percent of discharging aiding agent, 3 to 15 percent of corrosion inhibitor, 5 to 15 percent of antiswelling agent, 5 to 15 percent of iron ion stabilizer and 2 to 10 percent of hydrogen fluoride; (2) storing the acid liquor into an acid storage tank of an injection system, wherein the injection system consists of the acid storage tank, an acid resistant pump, a motor, a frequency converter, a flow sensor, a pressure sensor, a computer, a check valve, a three-way pipe and an acid injection pipe; (3) utilizing the acid resistant pump to pump the acid liquor into the water injection flow; (4) monitoring the variation of the pressure and the flow of the injected acid, and calculating skin coefficients in real time; and (5) keeping the water injection after stopping the acid injection. Due to the adoption of the offshore oilfield water injection well online one-step-process acidification technology, high efficiency, rapidness and large scale in plug removal of an offshore oilfield water injection well can be realized, the water injection pressure can be reduced, and the water injection quantity can be improved.

An irregular rock sample high-pressure permeation device with an adjustable flow direction and a test method thereof are provided, wherein two blocking mechanisms I and two blocking mechanisms II are arranged inside a cylinder body; partitioning plates are respectively arranged on both sides of each of the blocking mechanisms I; water blocking plates are respectively arranged at both sides of each of the blocking mechanisms I; one end of each of the water blocking plates is connected to the sidewall of each of the partitioning plates, and the other end of each of the water blocking plates is connected to an internal portion of the cylinder body; a water injection pipe is disposed between the water blocking plates on a same side. The present invention combines flexible film amorphous close fit properties and easy charging and discharging of free gas.

The invention relates to a potassium carbonate polyamine drilling fluid used for the petroleum drilling process. The potassium carbonate polyamine drilling fluid mainly comprises 1-60 percent of potassium carbonate, 0.5-25 percent of calcium oxide, 0.5-5 percent of polyamine shale inhibiting agent, 0-5 percent of bentonite, 0.5-3 percent of filter reducer, 0.1-0.5 percent of coating agent, 0.1-0.8 percent of tackifier, 0.5-5 percent of plugging agent, 0.1-2 percent of lubricating agent and a proper amount of weighing agent (added according to the requirement). The potassium carbonate polyamine drilling fluid can provide K+ with high concentration and has strong inhibiting capability on shale; the potassium carbonate and the calcium oxide react in equal mole ratio to generate micrometer and nanometer calcium carbonate superfine powder, thus CO32-anions generated by dissolving the potassium carbonate can be removed, the mineralization can be reduced and the influence of high mineralization on the action efficiency of other processing agents can be eliminated; and by matching, the calcium carbonate superfine powder can be deformed into asphalt and paraffin particles which can be usedfor plugging a microcrack shale stratum.

The invention discloses a spherical cavity type solar heat absorber with an inwardly concave glass cover. The heat absorber is mainly used for collecting sunlight and converting the sunlight into heat energy in a butterfly type solar high-temperature heat utilization system. The heat absorber mainly comprises a heat exchange coil pipe, the inwardly concave glass cover, an outer shell, an inner shell, a vacuum layer, a reflective wind shield and a heat conductive fluid. Different from the traditional opening type heat absorber and the cavity type heat absorber with the glass window at the cavity opening, the cavity type heat absorber disclosed by the invention is the opening type spherical heat absorber with the inwardly concave glass cover, therefore, the cavity type heat absorber not only has the light capturing capacity of the opening cavity type heat absorber but also has low heat loss of the cavity type heat absorber with the glass window at the cavity opening; meanwhile, the cavity type heat absorber is provided with the reflective wind shield, therefore, the capturing on deviated light can be strengthened, and the heat radiation on the inner wall and the convection heat transfer loss resulted from external natural wind can be reduced; and the cavity type heat absorber comprises the vacuum layer between the inner shell and the outer shell, therefore, the lost heat throughthe shells can be effectively reduced.

A semiconductor device includes a trench formed on a source side of a drift region, a p-type gate region and a gate formed at the bottom of the trench, and the source formed over the entire surface of the unit device through an insulating film. The narrowest portion of a channel of the device is deeper than one-half the junction depth of the p-type gate region. This allows the width of the channel on the drain side to be reduced even when a lower energy ion implantation manufacturing process is used.

The invention provides a water-based drilling fluid suitable for shale gas development. The water-based drilling fluid is prepared from the following raw materials in volume on the basis of water: 100 percent of water, 2 to 6 percent of lubricating agents, 1 to 5 percent of inhibitors, 1 to 5 percent of blocking anti-collapse agents, 1 to 5 percent of shale blocking agents, 1 to 5 percent of nanometer blocking agents, 1 to 3 percent of fluid loss additives, 1 to 3 percent of additives, 0 to 0.4 percent of shearing potentiator, 0.1 to 0.6 percent of pH regulator and 0 to 300 percent of weighting agents. The water-based drilling fluid has low filter loss, shale cracks can be effectively blocked, and the stability of a well wall is increased; the lubricating performance is good, and the problems of friction and torque caused by a shale gas horizontal well are preferably solved; the rheological property is excellent.

The composite multifunctional chemical unblocking agent consists of organic multifunctional unblocking agent in 50-100%, inorganic multifunctional unblocking agent in 5-35% and composite synergist 25-35%. Its main components include C7-C10 aromatic hydrocarbon organic solvent, polyethenoxy ether as surfactant, oil soluble water dispersed polyether demulsifier, T penetrator, polyether wetting agent, mutual solvent, insoluble scale converting agent, composite organic/inorganic acid, cationic polymer as clay stabilizer, water soluble polyether demulsifier, iron ion stabilizer, polyether wetting improver, corrosion assistant, corrosion retardant, cationic polymer as sand stabilizer, etc. The composite multifunctional chemical unblocking agent is injected into treated oil well to produce lasting unblocking effect 10 times that of earth acid.

The invention discloses a left auricle occluding device. The left auricle occluding device comprises a sealing disc and an anchoring device, both of which are connected. The position where the anchoring device is matched with a left auricle is an anchoring net of a boneless structure. The overall anchoring device is of a boneless structure and formed by weaving of hyper-elastic metal wires or memory alloy metal wires. The far end of the anchoring device is in the shape of an opening. The near end of the anchoring device is collected and connected with the sealing disc to form a conical net. The far end of the anchoring device is opened and turned up towards the near end to form the anchoring net surrounding the conical net. The anchoring net is joined with the conical net by means of a circular transition area. The left auricle occluding device has following beneficial effects: force can be uniformly distributed to be anchored in the interior of the left auricle in order to eliminate concentration of local stress and can also be repeatedly released; and an opening part of the left auricle is effectively and reliably blocked.

The invention relates to a high-temperature-resistant and high-salinity-resistant water-plugging profile control agent, and a preparation method and application thereof. The water-plugging profile control agent comprises polyacrylamide, a composite crosslinking agent, cyclodextrin, metaphenylene diamine and deoxidant, wherein the composite crosslinking agent consists of aldehyde, phenol and aluminum citrate; the aldehyde is one or the combination of benzaldehyde and paraformaldehyde; and the phenol is one or more of phenol, resorcinol and hydroquinone. The water-plugging profile control agent can resist the temperature of 120 DEG C, can be directly prepared by using water with mineralization degree of 150,000 mg/L, and has high crosslinking performance and long-term stability. The preparation method for the water-plugging profile control agent is simple, convenient to operate, and easy to control, and water-plugging profile control agent has a good plugging effect, and construction can be performed after the water-plugging profile control agent is directly prepared on site.

The invention provides water-based drilling fluid for stabilizing shale. The drilling fluid is formed by mixing sodium-based bentonite, a shale inhibitor, a tackifier, a flow-pattern adjusting agent, a filtrate reducer, a high-temperature-resisting processing agent, a bridging agent, bridging particle and an anti-collapse agent. Calculated by the addition quantity in every 100 parts of water, the water-based drilling fluid comprises the following components in parts by mass: 5 parts of sodium-based bentonite, 1.5 to 1.8 parts of shale inhibitor, 0.5 to 0.7 part of tackifier, 0.1 to 0.2 part of flow-pattern adjusting agent, 0.7 to 0.9 part of filtrate reducer, 2.3 to 2.5 parts of high-temperature-resisting processing agent, 9.33 to 10.67 parts of bridging agent, 1.8 to 2.2 parts of bridging particle and 1.1 to 1.3 parts of anti-collapse agent. The drilling fluid is good in rheological property, filtrate reduction property and lubricating property and strong in inhabitation property, so that the requirement of the shale gas horizontal well drilling cuttings carrying and wall stability requirement can be met, and the probability of drilling seizure can be reduced.

A copper indium gallium selenium (CIGS) thin film solar cell provided with an aluminum nitride (AIN) thin film layer comprises a substrate, a molybdenum (Mo) back electrode layer, a CIGS absorbed layer, a cadmium dating sulphide (CdS) buffer layer, an intrinsic zinc oxide (i-ZnO) layer, a mixing zinc oxide (ZnO:AI) window layer and front electrode nickel aluminum. The AIN thin film layer is arranged between the substrate and the Mo back electrode layer and serves as an electric insulation impurity barrier layer when the substrate is made of metal, the AIN thin film layer serves as an impurity barrier and stress intermediate layer when the substrate is made of glass, and the AIN thin film layer serves as a heat buffer layer when the substrate is made of polymer. The thin film solar cell has the advantages of adopting simple and cheap magnetic control sputtering technology to prepare an AIN thin film to serve as the impurity barrier layer or the electrical insulating layer of the substrate, being capable of having good resisting effects and keeping insulation characteristics of metal atoms even through the solar cell is prepared at high substrate temperature, and providing prerequisite conditions for manufacturing inline type tinsel substrate thin film solar cells.

The invention discloses an occlusion culling and acceleration method for drawing an outdoor ground surface in real time based on a depth map. The method comprises the following steps: drawing a current scene and storing the depth value of the scene to a piece of depth map through an acceleration algorithm; and carrying out rasterization on a bounding box of a model to be detected and judging the value of pixels in the bounding box of the model to be detected and the magnitude of the depth value in the previous step, and thus the result of occlusion culling is obtained. A portion sight line occlusion body is arranged in a scene editor in an engine, then, all objects in the scene are drawn; the least depth value of the sight line occlusion body in the current scene is recorded; and the depth value of the bounding box of the object to be detected is compared with the least depth value obtained by scene drawing, and visibility of the object is obtained. The purposes of good occlusion effect and real-time drawing can be realized.