Abstract: A method for removing liquid buildup in gas wells may include introducing a first aqueous solution and a second aqueous solution into the wellbore such that the first aqueous solution and the second aqueous solution may intermix within the wellbore. The first aqueous solution may contain a nitrogen-containing compound and the second aqueous solution may contain a nitrite-containing compound and a foaming agent. The method may further include maintaining the intermixed solution in the wellbore such that gas, heat, and foam may be generated, and removing the excess fluid from the wellbore. Furthermore, the method may include introducing an acid or acid precursor into the wellbore, releasing an acid from the acid precursor into the intermixed solution, and maintaining the acid with the intermixed solution in the wellbore to adjusted the pH of the intermixed solution to less than 7.0.

Abstract: A method of forming a permeable proppant pack in a geothermal formation can include injecting a fracturing fluid into a fracture of a geothermal formation having a formation temperature greater than about 275° C. The fracturing fluid can include proppants having a core of a solid material that is thermally stable at the formation temperature. The core can be at least partially coated with a resin coating that includes a polymer having a decomposition temperature below the formation temperature and a melting temperature below the decomposition temperature. The resin coating can be decomposed by the heat from the geothermal formation and the core of the proppants can remain in the fracture after the resin coating has decomposed.

Abstract: Embodiments provide functionality for extracting hyrdrocarbons from a subterranean formation. A fluid is provided and injected into a subterranean formation during a first period of time but not during a second period of time. At least part of the providing and injecting of the fluid is carried out using solar energy. Further, displaced hydrocarbons are collected from the subterranean formation.

Abstract: Apparatuses, systems, and methods of use are provided for a drilling stabilizer with chemical compartments within the teeth of the drilling stabilizer. The drilling stabilizer features dissolvable windows that allow chemicals to flow from the chemical compartments into the wellbore. The chemicals released can include cross-linkers or activators, which can react with polymers downhole to generate a plug for fluid loss control.

Abstract: A well tool can include a body and at least one barrier element. The barrier element can include a pyrolytically degradable material that is positionable to block a flow of fluid across the body within a wellbore and to degrade by pyrolysis over time within the wellbore.

Abstract: A novel surfactant composition that comprises of two surfactant components, a solvent, and water. The surfactant composition is added to a fracturing fluid, which is then pumped downhole into a subterranean formation where the novel characteristics of the fracturing fluid lend to improved oil production over the fracturing fluid without the surfactant composition.

Abstract: A method of increasing hydrocarbon recovery from a wellbore in a tight formation with greater breakdown pressures, the method including using hydro-jetting to effect a plurality of oriented cavities or discoidal grooves in the horizontal portion of the wellbore to overcome near-wellbore stresses, injecting a thermally controlled fluid into the wellbore to alter the temperature of the formation and lower stresses, and then fracturing the formation to generate a series of fractures that can be formed in a planar formation.

Abstract: In a manual/automatic non-electric-connection borehole clinometer for a landslide, a clinometer probe completes borehole inclination measurement; a hoisting mechanism is connected to the clinometer probe by a pull rope; and a first tooth disc of an automatic clutch and a first tooth disc of a manual clutch are fixed to a left shaft end and a right shaft end of the hoisting mechanism respectively, a second tooth disc of the automatic clutch is fixed to a driving shaft of an electric driving mechanism and selectively meshes with or moves away from the first tooth disc of the automatic clutch, and a second tooth disc of the manual clutch is fixed to a driving shaft of a manual driving mechanism and selectively meshes with or moves away from the first tooth disc of the manual clutch.

Abstract: A smart manifold for frac operations may include a support structure and a fluid management system arranged on the support structure. The fluid management system may be configured for receiving low-pressure frac fluid from a fluid processing system, delivering the low-pressure fluid to a plurality of pressurization units, receiving high-pressure fluid from the plurality of pressurization units, and delivering the high-pressure fluid to a well head. The smart manifold may also include a power management system arranged on the support structure. The power management system may be configured for receiving power for frac operations and for delivering power to each of the plurality of pressurization units.

Abstract: Tracer eluting proppants, such as proppants that have polymeric coatings on them that include tracers, such as a fluorescent dye. The tracer eluting proppants can comprise proppant particles coated with a polymeric coating that can elute tracer under some, but not all conditions. For example, the tracer can be eluted at elevated temperature, pH, and/or salinity conditions, but not elute at lower temperature, pH, and/or salinity conditions. Methods of making and using tracer eluting proppants are also disclosed, including methods for characterizing subterranean reservoirs.

Abstract: A system for cementing a borehole with foamed cement includes a gas delivery assembly mounted on a movable support structure, the gas delivery assembly configured to supply a gas to a cement slurry to generate a foamed cement slurry. The gas delivery assembly includes a heating element in thermal communication with a gas supply, a temperature sensor, a pressure sensor, a flow meter, and an automated control valve in fluid communication with the gas supply. The gas delivery assembly also includes a control module including a processing device configured to control a temperature and a flow rate of the gas supplied to the cement slurry based on a desired flow rate and measurements from the temperature sensor, the pressure sensor and the flow meter.

Abstract: A polymer dispersion includes a water-soluble copolymer prepared by controlled radical polymerization; a water soluble salt; a polyol; a salt selected from the group consisting of sodium citrate, sodium phosphate, sodium nitrate, and combinations thereof; and water. Methods for using the polymer dispersion for oilfield friction reduction occur under a variety of adverse conditions including low temperatures, salt, scale, and iron.

Abstract: Coated proppant particles are prepared by coating the particles with a coating composition that includes at least one polyisocyanate and at least one ingredient selected from i) an isocyanate trimerization catalyst, ii) a carbodiimide catalyst, iii) an alcohol, iv) a polyamine and v) an alkanolamine, and curing the coating composition. Starch is present during at least part of the curing step, such that the starch becomes embedded in at least a portion of the cured coating. The coating composition cures rapidly at moderate temperatures, and bonds to itself well under conditions of heat and pressure as are experienced by the particles in subterranean formations.

Abstract: A method of setting a wellbore fluid includes injecting a drilling fluid including water, cementitious material, a phosphonic acid derivative, a sulfonate acrylic acid copolymer, and zinc oxide into a wellbore; introducing sodium hexametaphosphate to the drilling fluid to form the wellbore fluid; allowing the sodium hexametaphosphate to dissolve phosphonate-calcium complexes between the phosphonic acid derivative and the cementitious material, thereby reducing the hydration time; and allowing the water and cementitious material to react, thereby curing the wellbore fluid and forming a cement.

Abstract: In a geothermal plant, alternately injecting an acid composition and a caustic composition removes or inhibits scale build-up.

Abstract: Aspects of the subject technology relate to systems and methods for optimizing multi-unit pumping operations at a well site. Systems and methods are provided for receiving sensor data from a hydraulic fracturing fleet equipment at an equipment system, designating an event as being flagged based on the sensor data from the hydraulic fracturing fleet equipment, determining a physical action based on the flagged event and a priority list of actions, and providing instructions to a first pump of the hydraulic fracturing fleet equipment to perform the physical action based on the flagged event and the priority list of actions.

Abstract: A method of obtaining a model of a sub-surface region, the model comprising a three dimensional matrix of sub-surface material property values. The method comprises providing a first approximation of said model, and performing simulations using the model to generate (i) a reference upgoing energy wave data set d0, where the acquisition parameters used in the simulation are a set of known acquisition parameters, and (ii) a plurality of perturbed upgoing energy wave data sets d0 where the acquisition parameters are obtained by randomly perturbing said set of known acquisition parameters. The method further comprises forming a matrix D, the columns of which are the differences di?d0 between the ith perturbed data set and the reference data set, applying an analysis to the matrix D to describe the matrix using a set of vectors, and selecting the most important vectors from said set of vectors to obtain a subset of vectors that describe said matrix D to an approximation.

Abstract: A method for recovering hydrocarbons from a hydrocarbon-containing formation. The method may include determining the hydrocarbon-containing formation pressure, temperature, and other properties such as the total acid number and total base number of the hydrocarbons, rock type, and brine ionic composition. The method may also include determining a desired amount of wettability alteration of the formation and modeling the formation. Modeling the formation may be based on the determined pressure, temperature, total acid number and total base number of the hydrocarbons, rock type, and brine ionic composition. The method may also include preparing an aqueous wellbore fluid based on the estimated wellbore fluid composition and injecting the aqueous wellbore fluid into the hydrocarbon-containing formation.

Abstract: A perforating gun connection whereby a signal may be carried from surface, down through a wireline or other conveyance, and across the connection from the pin on one perforating gun to an electrical contact structure on the next perforating gun in the string. In an example, the connection includes a connector body with an electrical pin positioned for contact with an electrical contact structure on the next perforating gun. The electrical contact structure has a contact tab aligned for engagement by the pin when connected with the connector body. The electrical contact structure may be unitarily formed to include a number of features to facilitate connection between perforating guns.

Abstract: Tubular cut monitoring systems and methods to cut a tubular are presented. The method includes running a downhole cutting tool to a location in a tubular. During a cutting operation, the method also includes monitoring, with an inertial sensor of the downhole cutting tool, for stick slip vibrations produced by a cutter blade of the downhole cutting tool. The method further includes determining whether a total number of stick slip vibrations produced by the cutter blade within a threshold number of revolutions of the cutter blade is greater than a threshold number of tolerable stick slip vibrations. In response to a determination that the total number of stick slip vibrations produced by the cutter blade within the threshold number of revolutions is greater than the threshold number of tolerable tick slip vibrations, the method further includes ceasing the cutting operation.