17 results about "Cement fixation" patented technology

The invention discloses a radioactive waste treatment method which comprises the following steps: firstly, treating a waste ventilation filter element to obtain a glass substrate, and then carrying out plasma high-temperature melting treatment on to-be-treated miscellaneous dry waste by adopting a glass material containing the glass substrate to obtain glass-like molten slag. The radioactive waste treatment method is ingenious in conception and simple and reasonable in step, the waste ventilation filter element subjected to cement fixation treatment is reused, the waste treatment cost is reduced, and the waste volume reduction effect is effectively improved. The invention further provides a radioactive waste treatment system and a waste ventilation filter element crushing and packaging system.

To provide a cement hardened body capable of efficiently suppressing release of ammonia gas contained therein.SOLUTION: A cement hardened body comprises a hardened body of a hardening cement composition containing cement, water, a fine aggregate, a coarse aggregate, and biochar. A biochar content is 1 kg / m3 or more and 200 kg / m3 or less, and an unevenness index of biochar in a cross section of the cement hardened body, calculated by the following analysis method, is 100% or less. An analysis method includes: converting the cross section of the cement hardened body into a biochar extraction image obtained by extracting the biochar by image analysis; dividing the biochar extraction image into N equal areas and shapes (where N is a natural number of 2 or greater); and calculating the area ratio of biochar within each divided biochar extraction image. An average and standard deviation of the numerical values of the area ratios (N values) are used for calculating the biochar heterogeneity index in the cross section of the cement hardened body, expressed as a variability index UCV defined by a specific formula.SELECTED DRAWING: None

An orthopedic augment (100) can be used where the patient's bone at an implantation site is structurally compromised to aid in securing the orthopedic prothesis at the implantation site. The orthopedic augment has, on an internal surface (2) thereof, cement fixation features (3) that receive an orthopedic cement therein and aid in resisting separation of the orthopedic prosthesis from the orthopedic augment. In addition, the orthopedic augment may include mechanical fixation mechanisms to engage the orthopedic prosthesis. Thus arranged, the orthopedic augment provides greater flexibility, in that it can be used in the form of a cone (e.g., cemented fixation) or a sleeve (e.g., mechanical fixation).

The invention relates to a method for performing downhole remedial cementing operations. A module with hydraulic cylinders is installed at a wellhead and then lowered into the wellbore, said module being mounted on a tubing string and being connected to a plug-packer having a fixed mandrel and movable parts. When a given depth is reached, excess pressure is generated in the tubing, causing the hydraulic cylinders to move downwards in relation to the fixed mandrel and to apply a force to the movable parts of the plug-packer. Next, a module with hydraulic cylinders and a cementing retainer-packer having a fixed mandrel and movable parts is lowered on the tubing. When a given depth is reached, excess pressure is generated in the tubing, causing the hydraulic cylinders to move downwards in relation to the fixed mandrel and to apply a force to the movable parts of the cementing retainer-packer. Next, via the installed cementing retainer-packer, a sealing material in the form of a cement composition is introduced under pressure with the guaranteed penetration thereof into holes made by a perforator. The result is an increase in the efficiency, versatility and safety with which downhole remedial cementing operations are performed.

The embodiment of the invention provides a servicing container and a servicing method, the servicing container is used for containing radioactive solid waste, and the servicing container comprises an outer barrel, a lining, a supporting frame and a first cement fixing body. The lining is provided with a containing cavity, the containing cavity is used for containing the radioactive solid waste, the lining is arranged in the outer barrel, and at least part of the area of the lining and the outer barrel are spaced to form an interval space. The supporting frame is arranged in the interval space and connected with the outer barrel and the lining. A first cement fixing body is arranged in the interval space so as to wrap the lining. The reconditioning container provided by the embodiment of the invention can improve the disposal effect on the radioactive solid waste.

The utility model relates to the field of street columns, in particular to a connecting structure for street column installation. The technical problems that in the installation process of an existing street column, the lower end of the street column is usually directly buried into a road surface through cement, due to the installation mode, after the street column is damaged, part of residues at the lower end of the street column are fixed by the cement to form a road surface protrusion, and certain potential safety hazards are caused to pedestrians are solved. According to the technical scheme, the connecting structure for street column installation comprises a street column body, a base assembly and a connecting assembly. Through the combination of the burying seat and the connecting slot, when a worker installs the street column, the burying seat can be buried into the ground in advance, so that when the street column is installed, a connecting inserting shaft of the connecting assembly is inserted into the connecting slot for quick installation.

A system and method for a composite cement retainer. A composite cement retainer has various components. When these various components comprise composite where feasible, or a drillable metal, the retainer can be easily placed and quickly drilled if necessary.

A color-adjustable repairing agent and a preparation method therefor, and concrete containing the repairing agent are disclosed in the present invention; the repairing agent is a mixture of microbial powder, dopamine and a calcium source immobilized by cement; and according to total mass of the mixture, a mass percentage of the microbial powder is 44%-54%, a mass percentage of the dopamine is 1%-5%, and a mass percentage of the calcium source is 44%-54%; according to the present invention, dopamine is mixed into a microbial self-repairing agent, a cement-immobilized microbial self-repairing agent is used for preparing repairing agent particles, a crack area of microbial self-repairing concrete is repaired, and repairing performance of the concrete and a color of a repairing product of the crack area are tested.

The utility model relates to corner polishing equipment for cement product processing. The corner polishing equipment comprises a top plate with a leakage groove. The ring body is arranged at the top of the top plate; the cement product needing to be polished is placed on a table top, two electric push rods are started to drive a push plate to move, cement is fixed between the push plate and an abutting plate, a third motor is started to drive driving teeth to rotate, the driving teeth are meshed with a toothed ring part, and therefore the ring body is driven to rotate; the grinding device can be controlled to rotate and adjust in the horizontal direction, a second motor is started to drive a threaded rod to rotate, the surface of the threaded rod and the interior of a sliding base are in threaded installation, the grinding device at the bottom of a column is controlled to slide in the horizontal direction, and dead-corner-free movement of the grinding device in the horizontal direction is achieved; the angle of the polisher can be rotationally adjusted, the four air cylinders are synchronous air cylinders, height adjustment of the polisher is achieved, and more polishing angles on the surface of the cement product are achieved.

The utility model relates to the technical field of damping devices, in particular to a modular assembly type ground damping device which comprises assembly plates laid on the ground, every two front-back adjacent assembly plates are connected through a first connecting plate, every two left-right adjacent assembly plates are connected through a second connecting plate, and a damping floor is arranged at the tops of the assembly plates. The top of the assembly plate is provided with four circular slots arranged in a matrix, and the bottom of the damping floor is provided with four circular iron blocks arranged in a matrix. According to the modular assembly type ground damping device, the modular design allows quick mounting and dismounting under the condition that traditional cement is not used for fixing. The assembling plates are connected together by using the first connecting plate and the second connecting plate, so that the mounting complexity is reduced, and the mounting time is shortened. When damaged parts are replaced, only specific modules need to be disassembled, overall disassembly is not needed, damage to the ground is avoided, and the damping floor can be easily disassembled and assembled through the design of the circular inserting grooves and the circular iron blocks.

The invention belongs to the technical field of nuclear waste treatment, and particularly relates to a cement fixing material and application thereof in fixing radioactive solid waste. The cement fixing material provided by the invention comprises the following components in parts by weight: 20-46 parts of a cementing material; 39 to 55 parts of fine aggregate; 5-25 parts of a mineral admixture; 0.2 to 0.7 part of a functional auxiliary agent; the cementing material comprises Portland cement and sulphoaluminate cement, the fine aggregate comprises sand, the mineral admixture comprises slag, metakaolin and fly ash, the functional auxiliary agent comprises a water reducing agent, a retarder, a thickening agent, a waterproof agent and a volume stabilizer, and the volume stabilizer comprises anion exchange resin powder and / or sulfamic acid. The cement fixing material provided by the invention not only meets the current national standard when being used for fixing radioactive wastes, but also has the characteristics of long service life, safety and reliability; and meanwhile, good operability performance is achieved.

A wellhead assembly (Fig.1 100) comprising: a foundation (Fig.1 101) having at least one well slot (Fig.1 200); the well slot comprising a receptacle 102 having an internal profile (Fig.3 103) for holding a well pipe (Fig.2 201); a sleeve 110 arranged in the receptacle; wherein the sleeve is vertically movable and has a top end 111 which in a first position is located above the internal profile and in a second position is located below the internal profile. Also provided is a method of installing a wellhead assembly at a seabed 130, wherein the foundation is lowered to the seabed, the sleeve is lowered into the well slot below the surface of the seabed, and a casing is inserted into the sleeve. The casing is then cemented to the sleeve to fix it in place. The sleeve of the present invention supports and guides the inserted casing, and prevents loose sediment near the seabed surface from being disturbed during cementing.

The utility model relates to a waterproof outer wall for a construction project. The waterproof outer wall comprises an inner wall body, a thermal insulation layer and an outer wallboard, the heat preservation layer is formed by arranging a plurality of heat preservation units in a matrix mode, and 1 / 4 circular inserting grooves are formed in the four corners of each heat preservation unit. The length and the width of each external wall panel are the same as those of each thermal insulation unit, and an anchoring pipe is fixed to the center of the diagonal line of the inner surface of each external wall panel and fixed in the corresponding inserting groove; air holes are formed in the outer surface of the outer wallboard and penetrate through the outer wallboard to be communicated with the anchoring pipe. The anchoring pipes on the external wall panel penetrate through the inserting grooves and are fixed to the internal wall body through cement, the firmness degree is far larger than that of glue bonding, and therefore the accident that the anchoring pipes and the heat preservation layer are peeled off together can be reduced. The external wall panel and the thermal insulation layer are installed in a staggered mode, the external wall panel covers the joint of the thermal insulation layer, and the downward-inclined joint is formed through the inclined face of the external wall panel, so that rainwater is difficult to enter or remain in the joint, and the waterproofness of the external wall is improved.

The utility model relates to socket quick -mounting technical field, concretely relates to a quick -mounting integrated socket assembly. It includes socket casing, the both sides of socket casing are close to the rectangular hole of the middle position and are equipped with the connecting plate of rectangular hole top side fixed connection, is provided with two fixed components in socket casing, and the fixed component includes two connecting blocks, and two connecting blocks fixedly connect in socket casing one side inner wall. The utility model since socket is fixed in the wall body through cement, leads to in the socket maintenance difficulty and the replacement difficulty, through the setting up two flat angle screws drive two sliding strips to carry out vertical movement, then by sliding strip through two guide posts drive extruding plate to rotate between two connecting blocks, can make two extruding plates to the wall body extrude, makes socket casing fixed in the wall body, to be able to avoid using cement to fix socket, further can solve the socket maintenance and the replacement difficult problem.

The utility model belongs to the technical field of noise monitors, and particularly relates to a stably-installed outdoor environment noise monitor which comprises a cement fixing base, an insertion box is arranged on the inner wall of the bottom of the cement fixing base, a connecting box is fixedly installed on the top of the insertion box, an installation frame is arranged above the connecting box, and a fixing frame is arranged on the installation frame. A noise monitor main body is fixedly mounted at the top of the mounting frame, an insertion box is placed in a groove body above the cement fixing base, the mounting frame is inserted into the inner side of a connecting box through a first insertion block, and at the moment, a knob can be controlled to drive a one-way screw rod to rotate; the one-way lead screw can drive the movable shaft to rotate through cooperation of the synchronous wheel and the synchronous belt after rotating, the movable shaft can drive the two-way lead screw to rotate through the bevel gear after rotating, the two-way lead screw drives the movable clamping blocks on the two sides to slide into the inner side of the clamping groove through thread fit after rotating, and the insertion box can be fixed conveniently and rapidly.

The utility model relates to benthic animal sampling device field, concretely relates to a sampling device suitable for large benthic invertebrate investigation in flood period, including cement fixed base, drift net and buoy. The cement fixed base is made of hollow brick irrigation cement, its top surface central fixed has annular steel ring, and the edge is fixed with support rod, the drift net includes square net frame and net bag, and is fixed in the base side through support rod, the buoy is connected with the annular steel ring of base through the rope. The utility model discloses the self -weight of cement base resists the impact of water flow, solves the problem that the existing drift net is prone to lodging in flood period, and cannot be used in hard riverbed, and through the cooperation of buoy and rope, realizes the quick positioning and recovery in deep water environment, and the device is simple in structure, stable and reliable, and has wide bottom quality adaptability, and is suitable for benthic animal sampling in flood period, various bottom quality and complex water flow conditions.

An assembly (2) for use in abandoning a wellbore comprises at least one perforating apparatus (4) operable to mechanically cut perforations in a wellbore casing and a cement retainer deployment assembly (6) comprising a mandrel (10) configured to slidably receive at least one cement retainer assembly (8), wherein said mandrel (10) is configured to deploy the cement retainer assembly (8) in the wellbore. The mandrel (10) comprises a longitudinal bore (16) to enable cement or another sealing material to be pumped through the cement retainer assembly (8). Mandrel (10) has a non-circular portion (10a) formed along a part of its length and a circular portion (10b) at its end.