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76results about How to "Good blocking effect" patented technology

Plugging agent for drilling fluid and protecting low percolation reservoir

The invention discloses a plugging agent for a drilling fluid and protecting a low percolation reservoir, comprising the following components of: 10-40 parts of acid-soluble fiber, 5-10 parts of oil-soluble resin, 30-60 parts of acid-soluble deformed particles, 5-10 parts of high-temperature resistant natural small molecule materials and 10-15 parts of calcium carbonate. The basic component of the plugging agent is the acid-soluble fiber which is swelled and soft, has good tenacity and can expand by adsorbing partial moisture, and the like in the drilling fluid to form a meshy structure so as to form plugging on a hole throat under the action of flowing pressure. In addition, other components in the plugging agent, such as the deformed particles, the natural small molecule materials and the calcium carbonate can combine with the fiber to play a rapid plugging role, and therefore, the plugging agent has low damage depth on the reservoir. The plugging agent can be matched with the radius of the hole throat of the low percolation reservoir according to the regulation on the radius of the hole throat of a low percolation core. A drilling fluid system using the plugging agent as the main plugging material has the dynamic core filtration rate not more than 0.1ml/10min at high temperature and high pressure.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Green and environmentally friendly foam oil displacement system based on alkyl glycoside and preparation method and application thereof

The invention relates to a green and environmentally friendly foam oil displacement system based on alkyl glycoside and a preparation method and application thereof and belongs to the field of chemical oil displacement for improving oil field crude oil recovery rate. The foam oil displacement system is obtained by using the alkyl glycoside as a main surfactant and compounding the surfactant with an anionic surfactant and a cationic surfactant. The alkyl glycoside surfactant adopted by the oil displacement system is from a natural source, is green and environmentally friendly, the average polymerization degree of sugar moieties is 1.0-3.0, and hydrophobic carbon chain length is 8-12. Other surfactants are industrialized produced fine chemicals, raw materials are easy to obtain, and preparation is simple. The foam oil displacement system has the properties of good temperature resistance and oil resistance, good dynamic foam stability, strong plugging effect, good salt resistance, ultralow interfacial tension and the like, has good compatibility with other oil-displacing agents, the effect of improving crude oil recovery rate is obvious, and the recovery rate of an indoor physical model oil displacement test can be improved by about 20%-26% OOIP.
Owner:SHANDONG UNIV

Rock blast hole blocking device and method for using device to block dry ice cracking rock blast hole

The invention relates to the technical field of engineering blasting, in particular to a rock blast hole blocking device and a method for using the device to block a dry ice cracking rock blast hole.The rock blast hole blocking device comprises a blocking body, a plastic sleeve and a sleeve head, the blocking body is internally provided with a channel for a wire to penetrate through, and the channel is communicated with the upper and lower ends of the blocking body; the method for blocking the dry ice cracking rock blast hole comprises the following the steps that 1, the plastic sleeve is selected and sleeves the lower portion of the blocking body; 2, the wire penetrates into the channel and out of the lower end of the blocking body; 3, the rock blast hole blocking device is aligned withthe rock blast hole; 4, the rock blast hole blocking device is vertically fixed in the rock blast hole. According to the rock blast hole blocking device and the method for using the device to block the dry ice cracking rock blast hole, the friction force between the sleeve and the hole wall is increased so that the effect of blocking the rock blast hole by dry ice can be more significant, and theproblem that the blocking effect is poor is solved. Since the structure of the rock blast hole blocking device is simple, the blocking body is internally provided with the channel so that the wire canpenetrate into the blocking body, and the quality of dry ice rock breaking can be improved.
Owner:中铁(广州)投资发展有限公司 +1

Environment-friendly type welding device for mechanical accessory machining

The invention discloses an environment-friendly type welding device for mechanical accessory machining. An upper transverse plate and a fixed plate are included; first electric telescopic rods are welded and connected to the positions around the left and right of the lower surface of the upper transverse plate; a clamping device is connected to the position below the upper transverse plate in a penetrating manner; a traction rope is fixedly connected to the front side of a connection block; the right side of the traction rope is coiled on a connection disk; an accessory body is further included, and is located on the inner side of the lower end of the clamping device; a control board is connected to the upper end of a bottom plate in a clamped manner; a fixed box is further included, and is fixedly installed at the lower end of the bottom plate; and an air blower is fixedly installed on the right side of a treatment box, and the upper end of the air blower is located in a collecting groove. The environment-friendly type welding device for mechanical accessory machining can be used for well treating medical dust and toxic gas, and can also play a very good shielding role in arc light radiation, and facilitates fast clamping and accurate positioning on the accessory body.
Owner:ZHEJIANG ZHONGJIAN WELDING EQUIP

Oil-based drilling fluid blocking agent and preparation method thereof

The invention discloses an oil-based drilling fluid blocking agent and a preparation method thereof. The oil-based drilling fluid blocking agent is prepared from a solid state mixture being 60 to 150meshes prepared by compounding oil-containing plant residue materials containing rich plant fiber and auxiliary materials accounting for 0.2 to 1 percent of the oil-containing plant residue materials,wherein the oil-containing plant residue materials are residue left after the grease removal from the oil-containing plant; the auxiliary materials are at least one kind of materials from calcium carbonate powder, magnesium stearate powder, talcum powder, superfine silica powder and calcium hydrophosphate powder with the mesh number being smaller than or equal to 60 meshes. The blocking agent isobtained through proportionally mixing the oil-containing plant residue materials and then performing drying, crushing, grinding and sieving. The preparation method is simple; the raw materials can beeasily obtained; the cost is low. The oil-based drilling fluid blocking agent has the characteristics of water absorption and oil absorption expansion, deformation capability, degradability, oleophilic performance and easy dispersion; the influence on the viscosity of the drilling fluid is small; waste materials can be reused; the cost is low; the environment is protected.
Owner:CNPC BOHAI DRILLING ENG

Acidizing blocking remover, preparation method thereof and blockage removing method applying the same

Relating to the field of oilfield development, the invention discloses an acidizing blocking remover, a preparation method thereof and a blockage removing method applying the same. The acidizing blocking remover comprises a component A, a component B, a component C and a component D. Specifically, the component A includes hydrochloric acid, xylene and water; the component B includes a mud acid/organic acid system; the component C includes additives, a composition capable of producing hydrofluoric acid and water; and the component D includes hydrochloric acid and water. The construction processincludes: step 1: injecting a pre-flushing liquid with a mass concentration of 2-5% into a water injection well; step 2: squeezing the component A into the stratum at a displacement of 1-1.5 cubic meter/min; step 3: reducing the displacement, and squeezing the component B into the stratum at a displacement of 1-1.2 cubic meter/min; step 4: squeezing the component C into the stratum at a displacement of 1-1.5 cubic meter/min; and step 5: adding the component D into the well. Combination of the whole components can achieve a good treatment effect on mixed plugging of old wells, and the acidizing blocking remover is suitable for wells with a deep blocking section, a large blockage removing radius and a large blocking remover dosage.
Owner:西安博宏石油科技有限公司

Rushing-proof water conservancy dam

The invention discloses a rushing-proof water conservancy dam. The rushing-proof water conservancy dam comprises a water drainage plate, wherein the water drainage plate is located on the lower surface of a breast wall; water drainage holes corresponding to the breast wall are formed in the water drainage plate; the left and right heights of the breast wall are inconsistent; the upper surface of the middle part of the breast wall is in a convex structure, and a vegetation layer is arranged at a convex part; gravel cushion layers are arranged at the parts, close to the two sides, of the breast wall; water seepage pipes are vertically mounted on the gravel cushion layers; the water seepage pipes correspond to the water drainage holes; fences are vertically mounted at the parts, close to the two sides, of the lower surface of the water drainage plate; the tops of the fences penetrate through the water drainage plate and extend into the breast wall to be fixedly connected with the breast wall; transverse reinforcing ribs and longitudinal reinforcing ribs are arranged in the fences respectively; and no less than one transverse reinforcing rib and no less than one longitudinal reinforcing rib are arranged. The rushing-proof water conservancy dam provided by the invention can bear the gravity relatively well and has a good stopping effect; the stress performance can be effectively improved, and loss of water and soil is reduced by using the effect of vegetation; and meanwhile, a lot of construction materials can be reduced, and dam construction cost is reduced.
Owner:CHENGDU GERUISI CULTURAL COMM

Reproducible filler filter drum for intercepting nitrogen and phosphorus in ecological ditch of farmland

The invention discloses a renewable packing filter cartridge applied to nitrogen and phosphorus interception in farmland ecological ditches. The filter cartridge housing is provided with a gate A, a middle grille, a gate B, a filter screen A, a gate D and a filter from the water inlet to the water outlet. The activated carbon adsorption layer is arranged between the screen B and the gate C, and the activated carbon adsorption layer is arranged between the filter screen B and the gate C; the top of the filter cartridge shell is provided with a water distribution system and water quality testing equipment. The flushing spray pipe A and the backwashing spray pipe B are respectively connected to the pressurized water pump; the bottom of the filter cartridge shell is provided with a circulation system composed of four water collection pipes, and the regenerated waste water is discharged through the four water collection pipes and collected into two pipelines , one pipeline directly returns to the ecological ditch, and the other pipeline returns to the farmland through the lift pump. The invention not only improves the interception efficiency of nitrogen and phosphorus by the ecological ditch, but also solves the problem of easy blockage caused by the laying of fillers, and also effectively removes larger suspended substances and odors in the water body of the ecological ditch.
Owner:TIANJIN UNIV

Granulator for producing thermal insulation materials and working method of granulator

The invention discloses a granulator for producing thermal insulation materials. The granulator comprises a main frame; a motor support is arranged on the side wall of the main frame; a speed regulating motor is arranged on the top end of the motor support; a speed reducer is arranged at the top end of the main frame and above the speed regulating motor; a bearing seat is connected to one side ofthe speed reducer; one side, close to the bearing seat, of the top end of the main frame is provided with a speed control material box; a feeding box is arranged at the top end of the speed control material box; and a material making cylinder is connected to the side wall of the speed control material box. Through arrangement of a left push plate, a right push plate, a first pull plate and a second pull plate, the feeding speed and the discharging speed of the granulator can be accurately controlled; through arrangement of an adjusting pore plate, the pore size of a discharging hole can be adjusted, so that discharging of particles with different sizes can be facilitated; through arrangement of a crushing roller, primary crushing can be carried out; and through arrangement of fixed crushing blocks and crushing blocks, crushing adjustment can be carried out according to different materials.
Owner:安徽群升建筑工程有限公司
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