Abstract: The present invention discloses a novel high-temperature visual acid etching test device and method; the test device includes a visual rock slab holder, an acid solution storage tank I, an acid solution storage tank II, a heating apparatus, a high-pressure water pump, a low-pressure acid pump, a back-pressure valve, an acid valve A, an acid valve B, an acid valve C, an acid valve D, an acid valve E, an acid valve F, a water valve G, a water valve H, a water valve I, a water valve J, and a water valve K; both the acid solution storage tank I and the acid solution storage tank II are provided with a piston therein, where the acid solution storage tank is divided into upper and lower independent parts by the piston. According to the present invention, the flowing process of an acid solution in a fracture can be directly observed to accurately characterize the distribution of the acid solution in the fracture, which facilitates a study on an acid etching mechanism.

Abstract: Various embodiments relate to p-phenylene ethynylene compounds as bioactive and detection agents. In various embodiments, the present invention provides a method of inducing germination of microbial spores including contacting the microbial spores with a p-phenylene ethynylene compound. In various embodiments, the present invention provides a method for detecting an enzyme, a method of protein analysis, or a method of detecting a chemical agent, including introducing a p-phenylene ethylylene compound to a composition including an enzyme substrate, and analyzing the fluorescence of the p-phenylene ethynylene compound. Various embodiments provide sensors that include a p-phenylene ethynylene compound and an enzyme substrate.

Abstract: A drilling fluid composition includes an aqueous base fluid, 0.01 to 10 wt. % of a date palm leaves extract (DPLE), 1 to 10 wt. % of clay particles, and 0.01 to 1 wt. % of a base, where each wt. % based on a total weight of the drilling fluid composition. The DPLE is homogenously disposed on surfaces of the clay particles. The clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite. A pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE. A method of making the drilling fluid composition.

Abstract: A drilling fluid composition includes an aqueous base fluid, 0.01 to 10 wt. % of a date palm leaves extract (DPLE), 1 to 10 wt. % of clay particles, and 0.01 to 1 wt. % of a base, where each wt. % based on a total weight of the drilling fluid composition. The DPLE is homogenously disposed on surfaces of the clay particles. The clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite. A pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE. A method of making the drilling fluid composition.

Abstract: Lost circulation materials may include a plurality of self-aggregating particles having a degradable coating, wherein the self-aggregating particles are capable of bonding via mechanical interactions, electrical interactions, magnetic interactions, chemical interactions, or any combination thereof into a plurality of aggregated particles. The aggregated particles have a larger effective size and can seal large openings/apertures in the subsurface that cause lost circulation during a wellbore drilling operation.

Abstract: A method of removing hydrogen sulfide from a subterranean geological formation includes injecting a drilling fluid suspension in the subterranean geological formation. The drilling fluid suspension has a pH of 10 or more and includes a layered triple hydroxide material, including copper, magnesium, and iron, in an amount of 0.01 to 1.5 percent by weight of the drilling fluid suspension. The method further includes circulating the drilling fluid suspension in the subterranean geological formation and forming a water-based mud, and scavenging the hydrogen sulfide from the subterranean geological formation by reacting the hydrogen sulfide with the layered triple hydroxide material in the water-based mud.

Abstract: A method for sealing and/or consolidating a subterranean formation, the subterranean formation being traversed by at least one injection well, includes the steps of preparing a gelling aqueous solution comprising an alkaline solution of potassium silicate, acetic acid and an aluminate, and injecting from the injection well, into the subterranean formation, the gelling aqueous solution to seal and/or to consolidate the subterranean formation.

Abstract: Fluid loss control additives for a cement slurry are provided. An exemplary fluid loss control additive includes a copolymer containing 2-acrylamido-2-methylpropane sulfonic acid monomer units and acryloylmorpholine monomer units, and a graft copolymer. The graft copolymer contains a humate and, grafted onto the humate, a side-chain polymer containing at least one of acrylamide monomer units, acryloylmorpholine monomer units, acrylic acid monomer units, and 2-acrylamido-2-methylpropane sulfonic acid monomer units.

Abstract: The present invention relates to a low-shrinkage and high-strength plant-based resinous blocking agent and preparation method thereof, and belongs to the technical field of oilfield development. The resinous blocking agent consists of the following substances according to weight parts: 37.2˜47.8 parts of epoxy plant oil, 19.8˜37.2 parts of benzoxazine, 22.9˜31.6 parts of curing agents, 0.8˜1.8 parts of initiators, 1.2˜1.8 parts of toughening agents, 0.5˜1.2 parts of reinforcing agents, wherein the sum of the weight parts of the above substances is 100 parts, the epoxy plant oil is obtained through epoxidation on unsaturated carbon-carbon double bonds in a molecule of dehydrated plant oil; the benzoxazine is synthesized from long-chain diamine, monohydric plant phenol and paraformaldehyde.

Abstract: A hot melt adhesive composition contains a 1-butene homopolymer, an ethylene-based polymer having a melting point of lower than 80° C., an ?-olefin copolymer having a melting point 80° C. or higher, a tackifying resin, wax, and a liquid softener, in which the ethylene-based polymer includes at least one type of copolymer selected from the group consisting of an ethylene-?-olefin copolymer and an ethylene-vinyl acetate copolymer.

Abstract: A wellbore fluid includes an aqueous fluid, a viscosifier, a stabilizer agent, and a lubricant. The aqueous fluid is an inhibitive divalent fluid. A method of preparing the divalent wellbore fluid is provided or formulated and includes methods of producing the divalent wellbore fluid, and methods of injecting or circulating the inhibitive divalent wellbore fluid into a wellbore or borehole provided in a formation and/or into a reservoir of the formation.

Abstract: A drilling fluid composition includes an aqueous base fluid, 0.01 to 10 wt. % of a date palm leaves extract (DPLE), 1 to 10 wt. % of clay particles, and 0.01 to 1 wt. % of a base, where each wt. % based on a total weight of the drilling fluid composition. The DPLE is homogenously disposed on surfaces of the clay particles. The clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite. A pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE. A method of making the drilling fluid composition.

Abstract: The present disclosure is directed to an aqueous gellable composition that includes water; 10 to 45 composition wt. % of a crosslinkable water-soluble polymer including at least one functional group selected from the group of carboxylic acid and carboxylic acid derivative; 1 to 10 composition wt. % of an organic or inorganic crosslinking agent for the crosslinkable water-soluble polymer; 10 to 40 composition wt. % of a polyurethane polymer; and 0.1 to 5 composition wt. % of a natural polymer. The organic crosslinking agent includes at least one compound from the group of: polyalkyleneimines, polyalkylene polyamines, phenolic compounds combined with formaldehyde, and hydroquinone combined with hexamethylenetetramine. Also, the inorganic crosslinking agent includes at least one metal compound M, wherein M is from the group of: aluminum(III), chromium(III), iron(III), zirconium(III), and any mixture thereof.

Abstract: A composition for treating a formation includes a surfactant including an amphiphilic block copolymer having a first block and a second block and an acid. The amphiphilic block copolymer is a reaction product of a first monomer and a second monomer via a reversible addition-fragmentation chain transfer polymerization (RAFT) in a two-step reaction using a chain transfer agent (CTA) and a radical initiator. The surfactant favors adsorption onto a surface of the formation such that a temporary barrier is formed, thereby attenuating a reaction rate between the acid and the formation.

Abstract: The present invention provides pneumatic tires which have reduced changes in hardness over time and which provide improved abrasion resistance while ensuring good durability. The present invention relates to a pneumatic tire formed from a rubber composition, the rubber composition containing: a rubber component including a hydrogenated copolymer containing a structural unit derived from an aromatic vinyl compound and a structural unit derived from a conjugated diene compound; and a liquid polymer having a number average molecular weight of 2,500 to 500,000, the hydrogenated copolymer being present in an amount of 80% by mass or less based on 100% by mass of the rubber component, the liquid polymer being present in an amount of 1 to 50 parts by mass per 100 parts by mass of the rubber component.

Abstract: A 3D printed proppant includes a core having support bars extending from the core to a shell, the shell encapsulating the core and the support bars. Another 3D printed proppant includes a porous core and a shell encapsulating the porous core, where the porous core has a porosity from 25% to 75%. The 3D printed proppant has a particle size from 8 mesh to 140 mesh. The core, the support bars, the porous core, the shell, or combinations thereof includes metal, polymer, ceramic, composite, or combinations thereof. Additionally, a method for producing a 3D printed proppant is provided.

Abstract: This disclosure relates to a fracturing fluid including an acrylamide-based copolymer, a graphene oxide additive, and a crosslinker, and methods of using the fracturing fluid to reduce fluid friction during treatment of a subterranean formation.

Abstract: Branched surfactants for use in formulations and processes suitable for hydrocarbon recovery. These formulations, include formulations suitable for fracking, enhancing oil and or gas recovery, and the recovery and/or production of bio-based oils.

Abstract: A composition that includes a polymer-grafted graphene particle and oil-based drilling fluid is provided. At least one side of the graphene particle comprises a grafted polymer. A method of using an oil-based drilling fluid is also provided. The method includes introducing the oil-based drilling fluid into a wellbore and circulating the oil-based drilling fluid during drilling operations. The drilling fluid includes a polymer-grafted graphene particle and oil-based drilling fluid. At least one side of the graphene particle comprises a grafted polymer. The oil-based drilling fluid includes a range of from about 0.01 ppb to 10 ppb of the polymer-grafted graphene particle.

Abstract: Although it has been difficult to stabilize a viscosity and a thixo ratio in a composition containing a (meth)acrylate compound having a polyisobutylene skeleton, the present invention can stabilize the viscosity and the thixo ratio in a photocurable composition containing a (meth)acrylate compound having a polyisobutylene skeleton. A photocurable composition including a component (A) and a component (B) such that the component (B) is contained in an amount of 0.1 to 15 parts by mass relative to 100 parts by mass of the component (A): component (A): a (meth)acrylate compound having a polyisobutylene skeleton; and component (B): a (meth)acrylamide compound.