Abstract: Values for porosity and permeability of core samples in a borehole are estimated by generating radial waves with an acoustic source in fluid around the core sample, and measuring pressure in the fluid. Moreover, the acoustic source operates at frequency close to a resonant frequency of the core sample. After the acoustic source no longer operates at the resonant frequency, pressure in the fluid attenuates over time. The pressure attenuation is recorded by the pressure measurements, along with the pressure in the fluid at the first harmonic (spectral component). The pressure attenuation and spectral component each are dependent on porosity and permeability of the core sample. Thus values for the porosity and permeability are determined based on the arithmetic relationships between pressure attenuation and the spectral component and porosity and permeability.

Abstract: A re-fracturing method involves placement and centralization of a liner string that has shaped charges at predetermined locations that are externally isolated with packers. The shaped charges can be set off in a desired order and re-fracturing can then take place in new locations. In a bottom up order for perforating sequentially larger balls can be landed on seats and developed pressure or component movement generated by applying pressure can be used to set a shaped charge and isolate portions of the borehole below. The balls and even the seats can be later milled out or just allowed to disintegrate or dissolve with well fluids that are present or later added to clear the liner for subsequent production. Alternatively, the liner could be removed by release of the packers before production or injection begins.

Abstract: An annular space is made smaller with a hub on an inner member that supports a base ring from which extend bristles that are preferably wire whose proximity is close enough to retain debris from passing through while leaving sufficient fluid paths to allow fluid movement in opposed directions in response to relative axial movement of the components that define the annular space. In one application a running tool for a liner string that has a hanger/packer is contemplated. Movement of the running string after the hanger is set and the liner is released from the string keeps the barrier in the annular space while allowing movement of an initially inserted gel put there on assembly to migrate from the annular space through the debris barrier. The running tool can have a cap on the liner top that eventually is moved away as the running tool is picked up.

Abstract: A barrier includes a housing and a valve member disposed in the housing. A flow tube within the housing and an actuator disposed in the housing are in operable communication with the flow tube. The flow tube is configured to rotate within other components of the barrier without imparting rotational torque to the actuator or the other components. A method of drilling through a barrier.

Abstract: Nuclear magnetic resonance apparatuses and methods for estimating properties of an earth formation are provided. An apparatus includes a carrier configured to be deployed in a borehole, at least one transmitting assembly configured to generate an oscillating magnetic field in a volume of interest within the earth formation, at least one receiving assembly configured to detect a nuclear magnetic resonance (NMR) signal originating in the volume of interest; and a magnet assembly configured to generate a static magnetic field in the formation from a primary side of the magnet assembly. The magnet assembly includes an array of longitudinally elongated magnets having a rotating pattern of magnetic orientations, the array configured to generate the static magnetic field in the volume of interest, and the static magnetic field strength is higher at the primary side than the field strength at a side of the magnet assembly that is opposite the primary side.

Abstract: An effective amount of at least one first component and an effective amount of at least one second component may contact a hydrocarbon-based fluid or be introduced into a hydrocarbon-based fluid having at least one foulant for decreasing the fouling by the foulant(s) as compared to an otherwise identical hydrocarbon-based fluid absent the first component(s) and second component(s). The first component(s) may be considered a dispersant, and the second component(s) may be considered free radical inhibitors in a non-limiting embodiment.

Abstract: A well servicing fluid for reducing polymer degradation is disclosed. The well servicing fluid is formulated with components comprising: at least one free radical scavenger, with the proviso that the free radical scavenger is not erythorbate, lignin or lignin derivatives; at least one polymer and an aqueous based solvent. Methods for servicing a well employing well servicing fluids of the present disclosure are also disclosed.

Abstract: The use of a dialdehyde (e.g. glyoxal) and a nitrogen-containing scavenger (e.g. a triazine) when injected separately in media containing hydrogen sulfide (H2S) and/or mercaptans to scavenge H2S and/or mercaptans therefrom gives a synergistically better reaction rate and overall scavenging efficiency, i.e. capacity, over the use of the dialdehyde or the nitrogen-containing scavenger used alone, but in the same total amount of the dialdehyde and nitrogen-containing scavenger. The media may include an aqueous phase, a gas phase, a hydrocarbon phase and mixtures of a gas and/or hydrocarbon phase with an aqueous phase.

Abstract: A tubular occlusion and pressure damping system includes, a tubular, an occlusion configured to block flow through the tubular, the occlusion having, a first chamber in pressure communication with an inside of the tubular, a second chamber in fluidic communication with the first chamber, and a flow restrictor in operable communication with the first chamber and the second chamber. The flow restrictor configured to throttle flow between the first chamber and the second chamber such that pressure increases within the second chamber lag behind pressure increases in the inside of the tubular at least until the second chamber has reached a selected volume after which pressure within the second chamber increases toward the pressure in the inside of the tubular.

Abstract: The power charge of a wireline pressure setting assembly includes a barrier located adjacent an open upper end of the power charge. The barrier centralizes the power charge in horizontal applications to ensure the associated tool properly sets. The barrier also limits how much of the power charge can flow out of its housing in a horizontal application. The barrier can be porous or impervious to contain as much of the power charge in a small sub-chamber in the pressure chamber defined by the barrier. Once ignition starts in the power charge the barrier can be consumed or otherwise disabled for the normal functioning of the setting device to set a tool and release from the set tool in a normal manner.

Abstract: A fiber optic splice protecting system and method includes a tubular sized to fit around spliced ends of optical fibers, and a sealant positioned in an annular space defined between the optical fibers and the tubular. The sealant is configured to cure from a liquid to a solid. The tubular is at least partially formed of a material that is gas permeable.

Abstract: A metal composite comprises: a matrix comprising periodic metal springs; and a filler material comprising one or more of the following: a carbon composite; a polymer; a metal; graphite; cotton; asbestos; or glass fiber; wherein the filler material is bounded to the matrix via one or more of the following: a mechanical interlocking; a chemical bond; a solid solution; or an active layer disposed between the periodic metal springs and the filler material.

Abstract: A concentration of at least one oxygen species may be maintained within a pre-determined range in a water-based stream by obtaining at least one measurement as a direct current (DC) output with at least one probe within the water-based stream. The measurement(s) may correlate to a measured concentration of the oxygen specie(s) within the water-based stream. The measured concentration of the oxygen specie(s) within the water-based stream may be altered when the measured concentration is outside the pre-determined range.

Abstract: A method of hydraulically fracturing a subterranean formation penetrated by a wellbore comprises: providing a diverting fluid comprising a carrier fluid, a first superabsorbent polymer and a second superabsorbent polymer, the second superabsorbent polymer having a shape, or a composition, or a combination thereof different from that of the first superabsorbent polymer; injecting the diverting fluid into the subterranean formation; and injecting a fracturing fluid into the formation after injecting the diverting fluid. A viscosity modifying agent can be present in the diverting fluid. Superabsorbent polymers can also be used to develop a temporary filter cake at the formation face to reduce or eliminate the fluid leakoff out of the wellbore.

Abstract: A kit for optional use with a PCR method of amplification may include at least one reaction well, and an internal amplification control for a PCR amplification of an APS reductase gene having a sequence complementary to at least one sequence essentially identical to SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6, SEQ ID NO:7, SEQ ID NO:8, SEQ ID NO:9, SEQ ID NO:10, SEQ ID NO:11, SEQ ID NO:12, SEQ ID NO:13, SEQ ID NO:14, SEQ ID NO:15, and mixtures thereof. The kit may be used with a PCR method of amplifying at least one sulfur-reducing bacteria extracted from an oilfield fluid.

Abstract: A method of fracturing a subterranean formation penetrated by a well comprises: forming a fracturing composition comprising a carrier fluid; and a superabsorbent polymer component comprising one or more of the following: a first composite of a proppant and a first superabsorbent polymer in an unhydrated form, the first superabsorbent polymer being at least partially embedded in a void area of the proppant; a coated superabsorbent polymer; a superabsorbent material having a three-dimensional network; or a second composite of a second superabsorbent polymer and a slow-release breaker; and pumping the hydraulic fracturing composition into the subterranean formation to create or enlarge a fracture.

Abstract: A method of manufacturing a hemiaminal dynamic covalent network (HDCN) comprises reacting a diamine and formaldehyde in the presence of a reaction medium comprising a polar solvent and a nonpolar solvent at a temperature of about 15° C. to about 100° C. to form the HDCN. A composition comprising the produced HDCN can be molded to form various articles comprising poly(hexahydrotriazine)s.

Abstract: A method of drilling a wellbore in a subterranean formation comprises circulating a water-based or oil-based drilling fluid in the subterranean formation; the water-based or oil-based drilling fluid comprising a carrier, and a superabsorbent polymer present in an amount effective to reduce fluid leakoff during the drilling operation, the superabsorbent polymer comprising crosslinks formed before the superabsorbent polymer is combined with the carrier.

Abstract: A method of removing residual proppant from a bottom of a casing after a fracturing operation comprises: circulating a casing flush fluid comprising a carrier and a superabsorbent polymer in the casing; and transporting the residual proppant from the bottom of the casing to a fracture created by a hydraulic fracturing operation. A method for cleaning a wellbore comprises: introducing a cleanout fluid through a conduit inserted into the wellbore, the cleanout fluid comprising a carrier fluid and a superabsorbent polymer; and receiving a returning fluid comprising debris at the surface of the wellbore from an annular space between the conduit and a wall of the wellbore.

Abstract: A gravel pack of screen sections separated by blank pipe is accomplished with sleeves around the blank sections that have a smaller run in dimension to allow the gravel to get past the sleeves during the gravel packing. When the gravel packing is complete the sleeves swell or otherwise enlarge to fill the voids where no or insufficient amount of gravel has been deposited. The presence of the enlarged sleeves prevents settling or shifting of the gravel pack away from the screens because voids that would otherwise have been there are filled with the enlarged sleeves. This is more of an issue in wells that are closer to vertical than horizontal.