Injection bore holes

A variety of materials, ranging from mineral binders to polymers, can be used as binder. However, materials based on polymers, such as epoxy or polyester resins, which are often used for concrete structures, should undergo careful assessment before use in historical masonry, due to possible issues regarding the mechanical and physical compatibility. Much more common for the repair of historical buildings are mineral binder systems based on cement or hydraulic lime with the addition of admixtures and fillers or aggregate. To inject bore holes, usually pure water/binder systems are used with typical w/b values of 0.8-1.0. However, the w/b ratio has to be adjusted according to the volume to be injected and to the moisture content of the substrate. 

Magnesium peroxide can also be utilized in the remediation of soils contaminated with hydrocarbons. In this process, slurry of the peroxide is injected into a small bore hole that penetrates into the zone of contamination. The slow decomposition of the compound releases oxygen into the surrounding contaminated soil, which encourages the growth of aerobic hydrocarbon metabolizing bacteria (Konenigsberg, 1997). 

A second area of importance is that concerned with drilling, where drilling muds are injected into the bore hole both to lubricate the drill and to form a coherent lining to the hole. Among the materials currently in use are slurries of derivatives of... 

In the TRUE-block tests three injection points were used at geometrical distances between 14 and 33 m. In both locations the tests were deemed to be made in prominent fractures that could be identified in several other bore holes. The main flow was expected to take place in these fractures. 

The injection mold is a series of steel plates, which when assembled produces the cavity that deflnes the shape of the molded part. Conventional molds consist of the mold frame, components, runners, cooling channels, and ejector system. The mold frame is a collection of steel plates that contain mold components and runners, cooling and ejection systems. Components are parts inserted into either bored holes or cutout pockets in the mold frame. The polymer melt enters into the mold cavity or cavities through the runners, which are passages cut into the mold frame. The hot polymer material in the mold... 

Step 1 inserting anchor bolt and setting up the injection long pipe and air vent short pipe in the bore hole. 

Steel bracket, which is fixed by anchor bolts to the top surface of abutment, is utilized as an unseating-prevention device. A shock absorbing chain connected between the steel bracket at bottom of girder and that of vertical front wall of concrete abutment is also adopted in order to avoid the bridge falling. Injected liquid epoxy resin is effective to fix the anchor bolts in horizontally bored hole. 

In this phase, the time has come to integrate the process simulation if necessary. In the case of uncertainties, the position of the injection points and the necessary tempering bore holes channels can be specified. 

All molds must either be cooled or heated in the injection process. For this purpose, bore holes in the workpiece are required. These deep holes are placed in the work-piece using the appropriate machine. For more complex mold constructions, nearly every forming component is provided with bore holes. 

Tree declines sawdustlike material on trunk near ground level. Cause Roundheaded appletree borers. These creamy white, darkheaded larvae bore into trunks near ground level, girdling the tree or tunneling into the heartwood. Kill borers by inserting a thin, flexible wire or by injecting parasitic nematodes into the hole. 

A velocity shot survey is used to determine if the steam flow pattern is being altered near the well-bore. This survey involves the injection of cold water at the surface and the injection of a water-based tracer (e.g., iodine-131) down-hole. From the time it takes the tracer to travel between two detectors, it is possible to estimate the perforation depths at which the water preferentially enters the formation. 

Polymer gel plugs or pill treatments are often employed to form temporary seals on holes encountered in the well bore that would otherwise permit the loss to the formation of large quantities of costly drilling fluids. They can also be used to divert injected fluids into the required zones in the formation and isolate other regions. They frequently employ the same components used in... 

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