Abstract: The present invention relates to a method for preparing a conjugated diene-based polymer, characterized in using a dimer acid saponified material as an emulsifier in a polymerization initiation step and injecting a monomer and the emulsifier in three or more installments after initiating polymerization, and the conjugated diene-based polymer prepared by the preparation method of the present invention has excellent physical properties such as impact strength and reflection haze.

Abstract: An oil field chemical release system for controlled release of an oil field chemical within a hydrocarbon reservoir, well, or wellbore, the oil field chemical release system comprising: a plurality of microcapsules, each microcapsule comprising an oil field chemical and a microencapsulant, wherein the oil field chemical is contained within the microencapsulant; and a continuous bulk polymer matrix, wherein the plurality of microcapsules are disposed within the continuous bulk polymer matrix, wherein the oil field chemical release system is configured to allow the oil field chemical to move through the microencapsulant into the continuous bulk polymer matrix and through the continuous bulk polymer matrix to be released through a surface of the bulk polymer matrix into the hydrocarbon reservoir, well, or wellbore at a controlled rate, and wherein the oil field chemical release system is configured to provide a release profile.

Abstract: Provided are a polymer viscosity reducer for a water-based drilling fluid and a preparation method thereof. The polymer viscosity reducer for the water-based drilling fluid is prepared from raw materials including, in parts by mass: 100 parts to 150 parts of water, 30 parts to 50 parts of acrylic acid, 10 parts to 20 parts of maleic anhydride, 40 parts to 60 parts of allyl polyethylene glycol, 3 parts to 6 parts of an initiator, 1 part to 3 parts of a pH regulator, 10 parts to 20 parts of a diamine, and 5 parts to 10 parts of a saturated organic acid.

Abstract: A sulfur-modified chloroprene rubber having a functional group A represented by specific General Formula (A) and positioned at a molecular terminal and a functional group B represented by specific General Formula (B) and positioned at a molecular terminal, in which a mass ratio B/A of a content of the functional group B with respect to a content of the functional group A is more than 0 and 6.00 or less, and a total amount of the functional group A and the functional group B is 0.10 to 0.60% by mass.

Abstract: Disclosed herein is a surfactant package comprising a base oil, a mutual solvent, and a surfactant, wherein the surfactant is selected from the group consisting of alcohol ethoxylates, fatty alcohol ethoxylates, alkylphenol ethoxylates, nonoxynols, fatty acid esters of sorbitol, alkyl ether carboxylic acids, ethoxysulfates, and combinations thereof. Also disclosed herein is a wellbore servicing fluid comprising an aqueous fluid and the surfactant package. The wellbore servicing fluid can be used in a method of servicing a wellbore penetrating a subterranean formation. The wellbore servicing fluid has an increased mud removal percentage, is compatible with an OBM and a cementitious fluid, and has reduced environmental impacts. The surfactant package can be added into the wellbore servicing fluid as a single component, which can save storage space and preparation time of the wellbore servicing fluid, thus the surfactant package can be used at a location having limited equipment/tools/space (e.g.

Abstract: A high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid, and preparation and application thereof are provided, belonging to the technical field of oilfield chemistry. The preparation method includes the steps of: mixing tetraethyl orthosilicate (TEOS), diethanolamine (DEA), and triethanolamine (TEA) for a transesterification and polycondensation reaction to obtain highly reactive hyperbranched polysiloxane; adding an acrylamide (AM) monomer, an anionic monomer, and a polar ester monomer into deionized water to obtain a monomer solution; adjusting the pH of the monomer solution to 5-9, and then adding highly reactive hyperbranched polysiloxane; introducing nitrogen to remove oxygen, adding an initiator, and thermally initiating a polymerization reaction; and after the reaction is completed, vacuum-drying and crushing an obtained product to obtain the high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid.

Abstract: A fluororubber composition contains 0.1 to 50 parts by weight of an epoxidized polybutadiene with respect to 100 parts by weight of a fluororubber. As the fluororubber, a vinylidene fluoride-hexafluoropropylene copolymer (FKM), a tetrafluoroethylene-propylene-based copolymer (FEPM), a tetrafluoroethylene-perfluoroalkyl vinyl ether-based copolymer (FFKM), or the like is exemplified. The fluororubber composition may further contain a vulcanizing agent or the like.

Abstract: A thermoplastic resin composition according to the present invention comprises: about 100 parts by weight of a polycarbonate resin; about 5 to about 15 parts by weight of a first rubber-modified vinyl-based graft copolymer in which a monomer mixture is graft-polymerized to a rubber polymer, the monomer mixture containing an aromatic vinyl-based monomer and a cyanovinyl-based monomer; about 2 to about 8 parts by weight of a second rubber-modified vinyl-based graft copolymer in which an alkyl (meth)acrylate-based monomer is graft-polymerized to a rubber polymer; about 0.5 to about 2 parts by weight of a siloxane copolyester; about 17 to about 40 parts by weight of talc; and about 13 to about 23 parts by weight of a phosphorus-based flame retardant, wherein the weight ratio of the first rubber-modified vinyl-based graft copolymer to the second rubber-modified vinyl-based graft copolymer is about 1:0.15 to about 1:0.

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 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 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: 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: 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: 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: 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: 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 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.