102864 results about "Slurry" patented technology

A process for controlling a slurry phase (co-) polymerisation process in the presence of a polymerisation catalyst, which comprises maintaining the density SPAN of the polymer powder particles (defined as the absolute value of the density difference in g / cm3 between the average density of the polymer particles exiting the reactor with particle size above D90 and the average density of the material with particle size below D10) below 0.005, preferably below 0.003, more preferably below 0.0026, most preferably below 0.0023.

Degradable material assisted diversion (DMAD) methods for well treatment, DMAD treatment fluids, and removable plugs for DMAD in downhole operations. A slurry of solid degradable material is injected into the well, a plug of the degradable material is formed, a downhole operation is performed around the plug diverter, and the plug is then degraded for removal. Degradation triggers can be temperature or chemical reactants, with optional accelerators or retarders to provide the desired timing for plug removal. In multilayer formation DMAD fracturing, the plug isolates a completed fracture while additional layers are sequentially fractured and plugged, and then the plugs are removed for flowback from the fractured layers. In DMAD fluids, an aqueous slurry can have a solids phase including a degradable material and a fluid phase including a viscoelastic surfactant. The solids phase can be a mixture of fibers and a particulate material.

Flexible abrasive sheet articles having precision thickness flat-topped raised island structures that are coated with a monolayer of equal sized abrasive agglomerate are described. Methods of producing high quality equal-sized spherical shaped composite abrasive agglomerate beads containing small diamond abrasive particles are described. Beads are produced by level-filling fine mesh screens or perforated sheets with a water based metal oxide slurry containing abrasive particles and then using a fluid jet to eject the abrasive slurry lumps from the individual screen cells into a dehydrating environment. Surface tension forces form the ejected liquid lumps into spheres that are solidified and then heated in a furnace to form ceramic beads. These porous ceramic abrasive beads can be bonded directly onto the flat planar surface of a flexible backing material or they can be bonded onto raised island surfaces to form rectangular or disk abrasive sheet articles. Abrasive articles having equal sized abrasive beads are particularly suited for lapping and raised island articles are suited for high speed lapping. Non-abrasive equal-sized beads can also be formed using this simple bead manufacturing process, which requires only a very low capital investment.

The invention discloses a hydraulic pressure milling deep-mixing underground-wall machine in the field of construction machinery, comprising a guide rod; an air conveying pipeline and a slurry conveying pipeline are arranged in the guide rod, two fixing plates are symmetrically arranged at the lower end of the guide rod left and right, at least one group of sealing milling and digging mechanism is arranged on each fixing plate, the sealing milling and digging mechanism comprises a hydraulic pressure motor fixed on the fixing plate, the output shaft end of the hydraulic pressure motor is provided with a sealing cover board, the sealing cover board comprises an axial section sheathed on the output shaft of the hydraulic pressure motor and a radial disc which is radially extended outwards, a rotating body is arranged at the periphery of the radial disc, a plurality of digging mixing teeth are circularly distributed at the periphery of the rotating body; an inner cover shell is sheathed outside the axial section, a bearing is arranged between the outer circumference of the inner cover shell and the inner circumference of the rotating body, the outer ring of the inner cover shell is fixed with the fixing plate, and the inner cover shell, the axial section and the rotating body are connected in a motive sealing way. The machine can cut soil layers and rock, the structure is simple, the sealing is good, can be used for constructing deep underground wall.

The disclosure is directed toward an optical excitation / detection device that includes an arrayed plurality of photodetectors and separately formed photoemitters, as well as a method for making such a device. A CMOS fabricated photodetector array including a plurality of individual photoreceptors is selectively etched back between photoreceptor locations to reveal a plurality of recessed regions having a certain geographic profile. A plurality of semiconductor blocks, each having light emitting capability and each having a certain geometric profile that is complementary in size and shape to the certain geometric profile of the recessed regions, are separately fabricated. These blocks are included within a fluid to form a slurry. The slurry is then flowed over the CMOS fabricated photodetector array in accordance with a fluidic self-assembly technique, and the included semiconductor blocks are individually deposited within each of the plurality of recessed regions in the CMOS fabricated photodetector array. The deposited blocks are then attached within the recessed regions to form the optical excitation / detection device from an arrayed plurality of photodetectors and separately formed photoemitters.

A method for well treatment by forming a temporary plug in a fracture, a perforation, a wellbore, or more than one of these locations, in a well penetrating a subterranean formation is provided, in which the method of well treatment includes: injecting a slurry comprising a degradable material, allowing the degradable material to form a plug in a perforation, a fracture, or a wellbore in a well penetrating a formation; performing a downhole operation; and allowing the degradable material to degrade after a selected time such that the plug disappears.

Microfluidic devices with multiple fluid process regions for subjecting similar samples to different process conditions in parallel are provided. One or more common fluid inputs may be provided to minimize the number of external fluid supply components. Solid materials such as chromatographic separation media or catalyst media is preferably provided in each fluid process region. Solid materials may be supplied to the devices in the form of slurry, with particles retained by porous elements or frits. Different fluid process regions may having different effective lengths, different solid material types or amounts, or may receive different ratios of common fluids supplied to the device. The flow resistances of dissimilar fluid process regions may be balanced passively with the addition of impedance elements in series with each fluid process region.

The present invention provides compositions and methods for enhancing subterranean well productivity by enhancing fracture conductivity. A method of increasing the conductivity of a fracture in a portion of a subterranean formation comprising providing a slurry comprising a fracturing fluid, a degradable material, and proppant particulates coated with a tackifying agent; allowing the degradable material to become at least temporarily attached to the tackifying agent coated onto the proppant particulates so as to avoid substantial segregation of the degradable material from the proppant particulates within the slurry; introducing the slurry to the fracture and allowing the proppant particulates and degradable material to form a substantially uniform particulate pack; and, allowing the degradable material to degrade and produce a particulate pack having voids therein.

The present invention provides compositions and methods for enhancing subterranean well productivity by enhancing fracture conductivity. A method of increasing the conductivity of a fracture in a portion of a subterranean formation comprising providing a slurry comprising a fracturing fluid, a degradable material, and proppant particulates coated with a tackifying agent; allowing the degradable material to become at least temporarily attached to the tackifying agent coated onto the proppant particulates so as to avoid substantial segregation of the degradable material from the proppant particulates within the slurry; introducing the slurry to the fracture and allowing the proppant particulates and degradable material to form a substantially uniform particulate pack; and, allowing the degradable material to degrade and produce a particulate pack having voids therein.

Disclosed is a process to produce a purified carboxylic acid product. The process comprises removing impurities from a crude carboxylic acid slurry in a solid-liquid displacement zone to form a slurry product. The slurry product if further treated in a staged oxidation zone and a crystallization zone to from a crystallized product. The crystallized product is further cooled in a cooling zone and subsequently filtered and dried in a filtration and drying zone. The process produces purified carboxylic acid product having good color and low impurity levels without the use of purification steps like hydrogenation.