Abstract:
An apparatus and method for determining the hardness of a granular material, comprises a base plate member, a sample cup for holding the granular material, an upper plate member, a crusher assembly and a crusher hammer release mechanism. The base plate member includes an upper surface with a recess for holding the sample cup. The upper plate member is positioned above and separated from the base plate member utilizing at least one separator post. The crusher assembly includes a crusher shaft, a crusher weight, a crusher hammer and a linear roller bearing having a retaining ring configured to slidably engage the crusher shaft through a conduit with the crusher weight and the crusher hammer positioned above and below the upper plate member respectively. The crusher hammer release mechanism includes a pair of levers operably connected to a latch cable having a latch pin that runs through a compression spring.
Abstract:
Die Erfindung betrifft ein Verfahren zum Erkennen einer Änderung des Fließverhaltens eines Schüttgutes (2) mittels eines Gerätes (3) zur Erfassung des Grenzfüllstandes des Schüttgutes (2) in einem Schüttgutbehälter (1), wobei das Gerät (3) versehen ist mit einem Antriebsmotor zur Erzeugung eines Drehmomentes sowie mit einer Signalverarbeitungseinheit zur Verarbeitung eines Füllstandssignals. Es werden Maßnahmen vorgeschlagen, wodurch eine Änderung des Fließverhaltens eines Schüttgutes (2) mittels eines Gerätes (3) ermöglicht wird. Auf eine aufwendige Prüfapparatur, beispielsweise auf den Einsatz eines Torsionsschergerätes, kann dadurch verzichtet werden.
Abstract:
A method bulk strength of powders uses acceleration forces to compact the powder into a small conical test cell that is rotated at high speed. Once the material is consolidated to a prescribed condition, the rotation is stopped, the outlet of the cell is exposed, and the cell is rotated again at increasing acceleration until material freely exits the cell. The forces generated on the powder in the cell are determined and used to compute the cohesive strength of the bulk material.
Abstract:
A test apparatus for the measurement of expansion and/or shrinkage of a cement test sample during curing under pressure and temperature conditions that simulate downhole oil well conditions isolates the test sample from a first fixed volume of incompressible pressurized liquid using a flexible barrier that forms a wall of a first chamber in a pressure vessel assembly. The first chamber is sealed by a movable piston. A second pressurizing medium is contained in a second chamber on the opposite side of the piston, and is in fluid communication with a pump, whereby the piston is pressure-balanced between the first and the second medium. The piston moves in a bore of the vessel assembly in response to changes in the volume of the test sample during curing and the amount of linear movement of the piston is detected by a sensor system that measures, correlates and transmits any change in the position of the piston as a change in the sample volume for display and recording.
Abstract:
A method for predicting flow properties of a material such as a pharmaceutical powder, which material is proposed for processing in a system that requires good flow properties for its successful operation. The method includes identifying key flow points along the system and, for each key flow point so identified, characterizing the type of flow occurring at that key flow point and selecting a flow test relevant for modeling the type of flow occurring at that key flow point. A plurality of material samples are selected as being candidates for processing in the system, wherein each material sample has a different composition, blend or concentration of ingredients. For each key flow point and for each material sample, the flow type characterizing the key flow point is modeled by conducting the specific flow test selected for that key flow point. Each material sample is then ranked based on a calculated average of the test result values to determine which of the material samples tested has optimal overall flow properties for the system.
Abstract:
An instrument for measuring certain physical properties of a sample of particulate material so that the flow characteristics of the material can be determined includes an improved compaction assembly having an upper piston (30) that is surrounded by a retractable sleeve (22) and further includes an improved test cell (40) having cylindrical walls (54), having a failure outlet smaller than the diameter of the failure piston (30), and having a false bottom (58) that can easily be removed from beneath a sample of compacted material to permit the failure portion of the test to be carried out. The tester can be used for determining the confined yield strength of the material, its bulk density, and its permeability.
Abstract:
The invention relates to the correlating of mechanical and geological (e.g. compositional) information from a rock core or a large number of rock cores. A geological facies model may be created correlating mechanical and geological information, and allowing prediction of the mechanical properties of rock with given geological properties, such as composition, porosity, etc.
Abstract:
Methods and apparatuses are provided for testing and quantifying structural durability characteristics such as the abrasion rate of bridging materials used in drilling fluids. Embodiments include sieving to create uniform batches having particles within a predefined range. Embodiments include selecting and drying a batch, separating the dried batch into dry samples, and selecting a test sample. Embodiments include sealing the test sample, a volume of liquid, and a rod in a cylindrical testing cell and rotating the cylindrical testing cell containing the rod such that the rod rolls in relation to an inner wall of the cylindrical testing cell and applies force partially crushing the test sample. The testing cell is built as a sealed wet rod milling device. Embodiments include sieving a resulting sample to create a durable sample having particles within the predefined range and drying the durable sample. Embodiments include measuring a mass of the dried durable sample to define a durable mass and comparing the durable mass to the initial mass of the test sample.
Abstract:
A cement sample testing apparatus including a first pressure zone; a second pressure zone; and a pressure control system. The pressure control system can be in fluid communication with the first pressure zone and the second pressure zone, operable to raise the first pressure zone to a first pressure above ambient pressure, and operable to raise the second pressure zone to a second pressure above ambient pressure. A method for determining mechanical properties for a sample cement composition can include applying a first pressure condition to a first portion of the sample cement composition; applying a second pressure condition raised to a second portion of the sample cement composition; and determining one or more mechanical properties of the sample cement composition based at least in part on the pressure conditions present at the failure of the sample cement composition.