Abstract: The present invention generally relates to the composition of particle gels for conformance control, well drilling and well treatments. More particularly, this invention relates to swellable polymer particle gels that can re-crosslink, i.e., reassociate and self-heal, at subterranean conditions. These particle gels can be deployed to improve the conformance of water flooding of especially matrix bypass events (MBEs), that are also known as void space conduits. Moreover, these particle gels can be deployed for controlling the water production and increasing of petroleum recovery. The inventive particles can also be deployed as diverter for well stimulation.

Abstract: A treatment fluid can include a base fluid and a lost-circulation package. The lost-circulation package can include plurality of pieces of a first lost-circulation material and a second lost-circulation material. The plurality of pieces can be an open-cell, natural or biodegradable material, for example natural sponges such as loofah. The plurality of pieces can enter permeable areas of a subterranean formation and form a mesh-like matrix that the second lost-circulation material can be retained within. The second lost-circulation material can be insoluble particles such as ground walnut shells or include ingredients that form a cementitious substance. The first and second lost-circulation materials can form a plug and provide adequate fluid loss control. The treatment fluid can be used in an oil and gas operation.

Abstract: A low-end rheology modifier for adjusting rheological characteristics of water-based drilling fluid systems, particularly for high salt, high density drilling fluids in high temperature and high-pressure applications. The low end rheology modifier comprises a copolymer and laponite clay, the copolymer comprising tert-Butylacrylamidosulfonic acid (TBAS) and n-vinylpyrrolidone (NVP) crosslinked with N,N?-Methylenebis(acrylamide).

Abstract: A variety of methods and systems are disclosed, including, in one embodiment, a method for emulsion breaking including: applying a trigger to an oilfield emulsion to facilitate breaking of the oilfield emulsion, wherein the oilfield emulsion includes an oleaginous phase, a non-oleaginous phase, and a breakable emulsifier, wherein the trigger breaks the breakable emulsifier into non-emulsifying byproducts; and separating at least a portion of the oleaginous phase from the non-oleaginous phase.

Abstract: Provided are a novel polyamide resin having a high melting point, and a composition and a molded article, for which the novel polyamide resin is used. A polyamide resin including a constituent unit derived from a diamine and a constituent unit derived from a dicarboxylic acid, where 70 mol % or more of the constituent unit derived from the diamine is derived from a xylylenediamine; and 70 mol % or more of the constituent unit derived from the dicarboxylic acid is derived from a phenylenediacetic acid; and where X+(Y/3) is 68 or more, when X mol % is defined as a proportion of a constituent unit derived from 1,4-phenylenediacetic acid in the constituent unit derived from the dicarboxylic acid, and Y mol % is defined as a proportion of a constituent unit derived from p-xylylenediamine in the constituent unit derived from the diamine.

Abstract: Barite (barium sulfate) scale may be problematic in subterranean formations, wellbores, pipelines, and other locations and may be difficult to remove in many instances. Aqueous fluid compositions effective for removing barite scale may comprise a concentrated mineral acid, a first salt comprising an iodide anion, and a second salt comprising an anion that forms an aqueous-soluble barium salt. One suitable aqueous fluid composition may comprise concentrated hydroiodic acid, an alkali metal iodide, and an alkali metal hypophosphite salt. The aqueous fluid compositions may be used in combination with a second treatment phase comprising a fluid composition comprising at least one acid gas capturing agent. The at least one acid gas capturing agent may comprise a first component reactive toward hydrogen sulfide and an optional second component reactive toward carbon dioxide.

Abstract: An addition-curable silicone rubber composition which contains: 100 parts by mass of (A) an organopolysiloxane that has at least two alkenyl groups, each of which is bonded to a silicon atom, in each molecule, and wherein an alkenyl group is bonded to a silicon atom at one end or both ends of the molecular chain; 1-80 parts by mass of (B) ?-cyclodextrin; (C) an organohydrogen polysiloxane that has at least two hydrogen atoms, each of which is bonded to a silicon atom, in each molecule in such an amount that the molar ratio of the hydrogen atoms bonded to silicon atoms (Si—H groups) to the total amount of the alkenyl groups bonded to silicon atoms in the entire composition, namely (Si—H groups)/(Si-alkenyl groups) is from 0.5 to 5.0; and a catalytic amount of (D) an addition reaction catalyst.

Abstract: The laminate adhesive contains a polyisocyanate component and a polyol component. The polyol component contains polyurethane polyol of a reaction product of polyol and a polyisocyanate derivative with an average functional group of more than 2. The polyisocyanate derivative is an araliphatic diisocyanate derivative and/or alicyclic diisocyanate derivative.

Abstract: A powder of modified cellulose fibers has an average fiber length of 1 ?m or more and 500 ?m or less, wherein the modified cellulose fibers are made from anionically modified cellulose fibers introduced at an anionic group with a modifying group. A dispersion contains a powder of modified cellulose fibers as defined above and a medium, wherein the powder of modified cellulose fibers is dispersed in the medium. A resin composition contains a powder of modified cellulose fibers as defined above and a resin, wherein the powder of modified cellulose fibers and the resin are blended. A resin molded article is obtained by molding a resin composition as defined above. A powder of cellulose fibers having excellent dispersibility in a solvent, which can be obtained by an inexpensive process, and a method for producing the same can be provided.

Abstract: A method to manufacture stable water-in-oil polymer emulsion with low viscosity by using special stabilizing surfactant package is disclosed.

Abstract: The present invention relates to a polymer composition comprising (A) from 60 to 90 wt % of a non-elastomeric polyethylene; (B) from 9.0 to 38 wt % of an elastomer; wherein onto component (A) or components (A) and (B) an acid grafting agent (C) has been grafted in an amount of from 0.01 to 3.0 wt %, all based on the total weight of the polymer composition, and wherein the polymer composition has two distinct peaks and a valley between said peaks in the GPC curve and a Z value, determined from the areas below the two peaks of the GPC curve, of at least ?0.3, wherein the Z-value is determined according to formula (I) Z=s/Abs(B?A) (I) wherein Abs(B?A) is the absolute value of (B?A); A=the area, between the tangent parallel to the MW axis going through log M (Min) and the LS15 signal, from log M of 5.1 to log M value where the LS signal is minimum log M (Min), in the log M range between 5.

Abstract: The present discloses a mussel biomimetic heat-resistant and salt-tolerant thickener and a preparation method therefor, a gel fracturing fluid and a preparation method and use thereof.

Abstract: Implementations described herein generally relate to a drag reducing agent (DRA) for improving flow of crude oils having high asphaltene content through pipelines. The DRA is a terpolymer having a glass transition temperature (Tg) of 6 degrees Celsius or below. The terpolymer is formed by a first monomer, a second monomer, and a third monomer. The first and second monomers are chosen based on the glass transition temperatures of corresponding homopolymers. The glass transition temperature of the homopolymer formed with the first monomer is at least 120 degrees Celsius higher than the glass transition temperature of the homopolymer formed with the second monomer. The DRA comprised of the terpolymer formed with the second monomer produces softer solids and fewer solids due to the low glass transition temperature of the terpolymer. The softer solids are more easily handled by the pump to keep the injection system clear.

Abstract: The present invention refers to a composition for water-based foamed fluid with high thermal stability for drilling depressed areas in oil and gas wells, comprising: i) a base fluid or drilling water consisting of fresh water; ii) a stabilizing agent; ii) a viscosifying agent; iv) a filtering reducing agent; v) a clay inhibiting agent; vi) an alkalizing agent and acid gas sequestering agent; vii) a thermal stabilizing agent; and viii) a foaming agent. Also, the present invention refers to a system that uses said composition for fluid and water-based foamed fluid with high thermal stability, the method of preparing the composition for fluid, the method of preparing the fluid and application of the composition and fluid in a water-based foamed fluid system with high thermal stability for drilling depressed or low-pressure areas in oil and gas wells.

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 manganese, zinc, and iron, in an amount of 0.01 to 0.5 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: The present invention relates to a composition comprising: at least one co-polymer of which at least one of the repeating units comprises at least one amide function; and at least one polyether having a molecular weight (MW) greater than 60 g·mol?1. The invention also relates to the use of said composition for delaying, or even preventing, the formation of gas hydrates, in particular in a method for extracting oil and/or gas and/or condensates, as well as to the method for delaying, or even preventing, the formation and/or agglomeration of gas hydrates, using a composition as defined above.

Abstract: Compositions are provided for preventing or alleviating loss of fluids from natural or artificial reservoirs formed in subterranean geological formations and methods for deployment of said compositions. The compositions can be delivered to the subterranean reservoirs in any number of steps and are comprised of rock surface adhesion promoter(s), particles that may consist of solids, gels and liquids, crosslinking agent(s) and a liquid medium. The method of the invention uses the composition of the invention in preventing or alleviating loss of fluid stored in a reservoir existing in a subterranean formation. In the method, the composition is preferably provided in a series of weighted or unweighted “pills” for introduction into the reservoir. Such a series may include from one to any number of consecutive treatments. Multiple pills or treatments may be used if needed.

Abstract: An drilling mud composition is described, which includes an aqueous base fluid, a viscosifier, and a weighting material The drilling mud composition also includes an anti-sagging agent that comprises a dimethylamino methyl ester, such as methyl 5-(dimethylamino)-2-methyl-5-oxopentanoate. The anti-sagging agent may be used to prevent barite sagging, where barite is used as a weighting material. Small amounts of the anti-sagging agent may be used to maintain a low sag factor while drilling, and without causing unwanted increases in viscosity. The anti-sagging agent is effective for both vertical and inclined wellbores.

Abstract: An aqueous based drilling fluid that exhibits improved lubricity, containing a phospholipid lubricant component and methods of improving the lubricity of an aqueous based drilling fluids. The methods include improving the lubricity of an aqueous based drilling fluid composed of an aqueous base fluid, and a weighting agent, with the addition of an effective amount of a phospholipid to substantially reduce the coefficient of friction when compared to the fluid absent the phospholipids.

Abstract: To provide a marking ink composition for a writing board having excellent erasability of drawn lines, the marking ink composition essentially containing a pigment, a pigment dispersant resin, a masking agent, and a modified polyvinylalcohol or a polyvinylalcohol having a degree of saponification from 40 to 84% by molar ratio.