Abstract: A method for downhole measurement operations. The method may include taking one or more measurements with a sensor disposed in a bottom hole assembly, converting the one or more measurements into one or more revolutions-per-minute (RPM) measurements, identifying one or more frequency components of the one or more RPM measurements using a Fast Fourier Transform, identifying one or more peaks of the one or more frequency components, and identifying torsional oscillation based at least in part on the one or more peaks. The method may be performed on a non-transitory computer-readable tangible medium comprising executable instructions that cause a computer device to take one or more signal measurements, identify one or more frequency components of the one or more signal measurements using a Fast Fourier Transform, and identify one or more peaks of the one or more frequency components.

Abstract: Methods and systems for characterizing multiple properties of a cement composition for use at downhole conditions using ultrasonic analysis tools are provided. In some embodiments, the methods comprise: transmitting at least a first p-wave and a second p-wave having different frequencies through a cement composition; determining velocities of the first and second p-waves through the sample; transmitting at least a third p-wave having a third frequency through the cement composition while allowing the cement composition to at least partially hydrate, wherein the third frequency is higher than the second frequency; determining at least a velocity of the third p-wave through the cement composition; based at least in part on the velocities of the p-waves, determining at least the compressibility, Poisson's ratio, Young's modulus, and shear modulus of the cement composition.

Abstract: Viscosity assemblies may be used to determine the viscosity of a sample fluid at a surface location under one or more downhole conditions prior to pumping or flowing of the sample fluid downhole. A viscosity assembly may include a bob assembly disposed in a container that includes a bob disposed about a magnet rotor that rotates when a shear force is applied by the flow of the sample fluid in the container. A stator coil may receive a control signal that induces a force or a voltage that causes the magnet rotor to rotate the bob by a predetermined distance to position the bob from the rotated position back to the initial position.

Abstract: A mud retort assembly includes a retort that heats a fluid and thereby generates vapors, a condenser in fluid communication with the retort to at least partially condense the vapors and thereby generate a liquid, a condensate collector that receives the liquid and residual vapors via an outlet pipe of the condenser, and a collector plug having a frustoconical body that extends partially into the condensate collector at an opening to the condensate collector. The collector plug defines a central aperture that receives the outlet pipe and has an annular flange extending radially outward from the frustoconical body to rest on the condensate collector at the opening.

Abstract: Methods and systems for characterizing multiple properties of a cement composition for use at downhole conditions using ultrasonic analysis tools are provided. In some embodiments, the methods comprise: transmitting at least a first p-wave and a second p-wave having different frequencies through a cement composition; determining velocities of the first and second p-waves through the sample; transmitting at least a third p-wave having a third frequency through the cement composition while allowing the cement composition to at least partially hydrate, wherein the third frequency is higher than the second frequency; determining at least a velocity of the third p-wave through the cement composition; based at least in part on the velocities of the p-waves, determining at least the compressibility, Poisson's ratio, Young's modulus, and shear modulus of the cement composition.

Abstract: Viscosity assemblies may be used to determine the viscosity of a sample fluid at a surface location under one or more downhole conditions prior to pumping or flowing of the sample fluid downhole. A viscosity assembly may include a bob assembly disposed in a container that includes a bob disposed about a magnet rotor that rotates when a shear force is applied by the flow of the sample fluid in the container. A stator coil may receive a control signal that induces a force or a voltage that causes the magnet rotor to rotate the bob by a predetermined distance to position the bob from the rotated position back to the initial position.

Abstract: The embodiments herein relate generally to subterranean formation operations and, more particularly, to enhancing aging testing to characterize settling of particulates in treatment fluids for use in subterranean formation operations. The embodiments use a test cell apparatus comprising a test cell body having an open end for receiving a treatment fluid into an interior of the test cell body, the interior having a floating piston for separating the treatment fluid from a pressurization fluid; a sampling port extending from the open end and having a sample valve for receiving samples of the treatment fluid from the sampling port; a pressure input for pressurizing the interior; and a sealing assembly adapted to be inserted into the test cell body in contact with the interior to fluidly seal the open end and through which the sampling port extends, the sealing assembly comprising a retainable test cell cap.

Abstract: Systems and methods for measuring the viscosity of a fluid may comprise a rotor cup having an inner chamber; a first bob rotatably disposed within a first region of the inner chamber; and a second bob rotatably disposed within a second region of the inner chamber, wherein the second bob rotates relative to the first bob based on a difference in viscosity of fluid in the first region and the second region.

Abstract: A system for measuring the viscosity of a fluid comprises a rotor cup; a bob disposed within the rotor cup and having shaft rotatably coupled to the rotor cup; a bearing connecting the shaft of the bob to the rotor cup; a magnetic coupling comprising a first magnetic element connected to the shaft of the bob and a second magnetic element disposed outside the rotor cup adjacent to the first magnetic element; and an inertial measurement unit disposed adjacent to the second magnetic element which is capable of sensing rotation of the magnetic coupling.

Abstract: Systems and methods for measuring the viscosity of a fluid comprises an oscillation cylinder having an inner surface, wherein the oscillation cylinder includes a fluid; a fixed piston having a first stopper disposed within the oscillation cylinder and forming a seal with the inner surface; an adjustable piston having a second stopper disposed within the oscillation cylinder and forming a seal with the inner surface; a chamber defined between the first stopper and second stopper; a bob formed within the chamber having a sensor which measures an axial shear force induced by the oscillating cylinder which is indicative of the apparent viscosity of the fluid in the chamber; and a motor capable of linearly translating the oscillation cylinder.

Abstract: A system includes a shaft and a light path surface coupled to or integrated with the shaft. The light path surface is displaced as a function of twist angle at a point along the shaft. The system also includes a sensor configured to measure the light path length that varies according to displacement of the light path surface. The system also includes a processing unit that determines a twist angle value for the point along the shaft based on the measured light path length.

Abstract: A cement testing apparatus has a pressure vessel system defining a first interior volume sealed from a second interior volume. The pressure vessel system has a confining pressure port in fluid communication with the first interior volume and a rebalance pressure port in fluid communication with the second interior volume. A cement sample container is provided within the first interior volume. A displacement indicator is coupled to move with deformation of a cement sample supported by the sample container. The displacement indicator has a first portion inside the first interior volume, a second portion inside the second interior volume, and a third portion traversing a space between the first and second interior volumes.

Abstract: The embodiments herein relate generally to subterranean formation operations and, more particularly, to enhancing aging testing to characterize settling of particulates in treatment fluids for use in subterranean formation operations. The embodiments use a test cell apparatus comprising a test cell body having an open end for receiving a treatment fluid into an interior of the test cell body, the interior having a floating piston for separating the treatment fluid from a pressurization fluid; a sampling port extending from the open end and having a sample valve for receiving samples of the treatment fluid from the sampling port; a pressure input for pressurizing the interior; and a sealing assembly adapted to be inserted into the test cell body in contact with the interior to fluidly seal the open end and through which the sampling port extends, the sealing assembly comprising a retainable test cell cap.

Abstract: A mud retort assembly includes a retort that heats a fluid and thereby generates vapors, a condenser in fluid communication with the retort to at least partially condense the vapors and thereby generate a liquid, a condensate collector that receives the liquid and residual vapors via an outlet pipe of the condenser, and a collector plug having a frustoconical body that extends partially into the condensate collector at an opening to the condensate collector. The collector plug defines a central aperture that receives the outlet pipe and has an annular flange extending radially outward from the frustoconical body to rest on the condensate collector at the opening.

Abstract: Automated calcimeter systems and methods of using the same are described. An automated calcimeter system may comprise a reaction chamber; a pressure sensor coupled to the reaction chamber and configured to measure pressure in the reaction chamber; a pump coupled to the reaction chamber; piping coupled to the pump, wherein the piping is of sufficient length to store a preselected volume of acid; and a processor configured to instruct the pump to deliver the preselected volume of acid to the reaction chamber while also drawing a volume of gas from the reaction chamber, wherein the volume of gas is equivalent to the preselected volume of acid.

Abstract: Systems and methods for measuring the viscosity of a fluid comprises an oscillation cylinder having an inner surface, wherein the oscillation cylinder includes a fluid; a fixed piston having a first stopper disposed within the oscillation cylinder and forming a seal with the inner surface; an adjustable piston having a second stopper disposed within the oscillation cylinder and forming a seal with the inner surface; a chamber defined between the first stopper and second stopper; a bob formed within the chamber having a sensor which measures an axial shear force induced by the oscillating cylinder which is indicative of the apparent viscosity of the fluid in the chamber; and a motor capable of linearly translating the oscillation cylinder.

Abstract: A system for measuring the viscosity of a fluid comprises a rotor cup; a bob disposed within the rotor cup and having shaft rotatably coupled to the rotor cup; a bearing connecting the shaft of the bob to the rotor cup; a magnetic coupling comprising a first magnetic element connected to the shaft of the bob and a second magnetic element disposed outside the rotor cup adjacent to the first magnetic element; and an inertial measurement unit disposed adjacent to the second magnetic element which is capable of sensing rotation of the magnetic coupling.

Abstract: Systems and methods for measuring the viscosity of a fluid may comprise a rotor cup having an inner chamber; a first bob rotatably disposed within a first region of the inner chamber; and a second bob rotatably disposed within a second region of the inner chamber, wherein the second bob rotates relative to the first bob based on a difference in viscosity of fluid in the first region and the second region.

Abstract: Automated calcimeter systems and methods of using the same are described. An automated calcimeter system may comprise a reaction chamber; a pressure sensor coupled to the reaction chamber and configured to measure pressure in the reaction chamber; a pump coupled to the reaction chamber; piping coupled to the pump, wherein the piping is of sufficient length to store a preselected volume of acid; and a processor configured to instruct the pump to deliver the preselected volume of acid to the reaction chamber while also drawing a volume of gas from the reaction chamber, wherein the volume of gas is equivalent to the preselected volume of acid.

Abstract: A system includes a shaft and a light path surface coupled to or integrated with the shaft. The light path surface is displaced as a function of twist angle at a point along the shaft. The system also includes a sensor configured to measure the light path length that varies according to displacement of the light path surface. The system also includes a processing unit that determines a twist angle value for the point along the shaft based on the measured light path length.