A method for measuring a rheological property of a drilling fluid by using a curved pipe on site includes: step 1: deriving relationship constants between friction coefficients of a drilling fluid through offline checking; step 2: calculating R.sub.ei according to f.sub.ci; step 3: calculating an actual shear stress τw.sub.i and a shear rate γ.sub.i of the drilling fluid in the on-site curved pipe according to the relationship constants and R.sub.ei; step 4: establishing a plurality of on-site models according to τw.sub.i and γ.sub.i; step 5: determining an optimal on-site model according to correlations between τw.sub.i and predicted shear stresses of the plurality of on-site models; and step 6: performing on-site measurement on the rheological property of the drilling fluid according to the optimal on-site model. The method avoids inaccurate rheological measurement due to different types of drilling fluids and improves the measurement accuracy for different types of drilling fluids.

A first series of images of a first fluid is received. A first set of fluid characteristics of the first fluid is determined from the first series of images. A second series of images of a second fluid is received. A second set of fluid characteristics of the second fluid is determined from the second series of images. A match is determined to be found between the first set of fluid characteristics and the second set of fluid characteristics. The second fluid is identified based upon determining that the first set of fluid characteristics matches the second set of fluid characteristics.

A magnetic pole part, a fiber-reinforced material, a test apparatus therefor, and a control method for the test apparatus. The test apparatus comprises: a container provided with an adhesive agent container therein for containing an adhesive agent; a positioning member for positioning a member to be tested inside the container and partially inside the adhesive agent container; an adhesive agent heating member 912) for heating the adhesive agent; and an adhesive agent temperature sensor for measuring the temperature of the adhesive agent; a controller for turning on or off the adhesive agent heating member according to a temperature signal detected by the adhesive temperature sensor so as to keep the adhesive agent in the adhesive agent container at a preset temperature.

A drag reducing efficiency test is performed on a sample. The sample includes a crude-oil based fluid and a drag reducing agent. The sample is placed within an inner volume defined by a sample housing. A sensing portion of a sensor is submerged in the sample within the sample housing. The sensor includes a disk (sensing portion) and a supporting rod. A lid is placed on the sample housing to isolate the sample within the inner volume. The sensor is coupled to an air bearing motor. The sensor is rotated by the air bearing motor at a plurality of shear rates. For each shear rate, the sensor measures a torque applied by the sample on the disk in response to the disk rotating while submerged in the respective sample at the respective shear rate.

The invention relates to a method for determining the intrinsic viscosity [η] of an aqueous polymer solution at a temperature T, wherein the aqueous polymer solution comprises at least one acrylamide-based polymer in an aqueous solvent, the aqueous solvent having a salinity of from 6 to 250 g/L, the method comprising the steps of: —providing a single universal relation R.sub.1 between (i), the product of polymer concentration and intrinsic viscosity C.Math.[η], and (ii) specific viscosity at zero shear rate η.sub.sp; —performing a measurement of the dynamic viscosity of the aqueous polymer solution at one polymer concentration C.sub.1, at temperature T and at various shear rates; —determining from said measurement the zero-shear viscosity η.sub.0 of the aqueous polymer solution at polymer concentration C.sub.1 and at temperature T; —calculating the specific viscosity at zero shear rate of the aqueous polymer solution at polymer concentration C and at temperature T as η.sub.sp=(η.sub.0−η.sub.s)/η.sub.s, where η.sub.s is the zero-shear viscosity of the aqueous solvent; —estimating the intrinsic viscosity [η] of the aqueous polymer solution at temperature T by applying the universal relation R.sub.1 to the calculated specific viscosity at zero shear rate η.sub.sp and polymer concentration C.sub.1.

A system for analysing a fluid is described, including an in-line sensor configured to analyse a fluid flowing past the in-line sensor to determine at least one in-line value of a fluid parameter of the fluid across an event period, and a sample sensor configured to analyse a sample of fluid extracted from the flow of fluid during the event period, to determine a sample value of the fluid parameter for the sample. At least one processor is provided, configured to determine a representative in-line value of the fluid parameter across the event period based at least in part on the at least one in-line value, and determine an overall representative value of the fluid parameter across the event period based on the representative in-line value, the sample value for the sample, and one or more of the in-line values corresponding to the time of extracting the sample, wherein determination of the overall representative value is based on an error correction value determined for the in-line sensor during the event period.

The present invention relates to devices for measuring property changes via in-situ micro-viscometry and methods of using same. The aforementioned device is inexpensive and can be used to quickly and accurately measure numerous physical and chemical property changes, including but not limited to the rate of chemical cure, change in tack, and rate of mass loss, for example, rate of moisture, solvent and/or plasticizer change.

This invention relates to a method for measuring viscosity of a fluid using particle diffusometry (PD). The method finds practical applications in detecting structural and functional changes of a biomolecular composition by comparing the viscosity change as compared with the standard of the biomolecular composition. This method may also find uses in clinical diagnosis and quality control of clinical biological medicines, food and feeds during the process of manufacturing, distribution and consumption.

Methods and systems for forming 3D articles by vat photopolymerization processes in which resin viscosities are determined both prior to the commencement of the build process and, optionally, during the build process by measuring the torque required to raise and lower a build plate within the resin in the vat. The resin may be heated, and its viscosity thereby altered, by heating the resin in the vat using a light engine employed for fabricating the 3D articles.

Provided is a small blood viscosity measurement kit and a cartridge therefor. The small blood viscosity measurement kit configured to measure a blood viscosity includes: a kit body; two blood pipes disposed symmetrically on two sides of the kit body, wherein an upper side of each of the two blood pipes is open and configured to receive blood injected thereinto; and a fine channel connected to a lower side of the each of the two blood pipes. When blood is injected into one of the two blood pipes, the blood is supplied to the other of the two blood pipes through the fine channel. In addition, there is provided a small blood viscosity measurement kit cartridge, in which a plurality of small blood viscosity measurement kits are stored and kept, and the small blood viscosity measurement kit cartridge automatically supplies the small blood viscosity measurement kits.