摘要:
Cementing compositions and methods of using such compositions in oil, gas and water well cementing operations to reduce fluid loss from the composition to the formation are disclosed. Such compositions incorporate certain copolymers and copolymer salts of N,N dimethylacrylamide and 2-acrylamido, 2-methyl propane sulfonic acid having mole ratios of between 1:4 and 4:1 respectively and average molecular weights of between about 75,000 and about 300,000.
摘要:
Disclosed is a process for encapsulating in cement a boric acid slurry which is at least about 30% boric acid. To the sulrry is added about 3.5 to about 4.5% dispersing agent, about 0.02 to about 0.03 ml/g of a cement retarder, up to about 0.4% of a hardener, and sufficient cement to bring the weight ratio of water to cement to about 0.4 to about 0.6. Also disclosed is a cement composition produced by said method.
摘要:
Cementing compositions and methods of using same in high temperature oil and gas well cementing operations are disclosed. Such compositions are comprised of fresh or salt water cement slurries, a water-soluble borate and particular terpolymers comprised of a strong acid monomer, a weak acid monomer and a nonionic monomer.
摘要:
Methylenephosphonic acid derivatives of bis(aminoalkyl)piperazine are employed as cement set retarding additives. The compounds must have at least one of the amine hydrogens phosphonomethylated.
摘要:
Grinding aid for grinding pretreated or untreated minerals and mixtures of minerals, such as cement, characterized in that it consists of 1,1-dimethylol propane. Distillation first runnings from trimethylol propane production containing 1,1-dimethylol propane as the main constituent are particularly suitable. The grinding aid according to the invention leads to a considerable improvement to the flowability or fluidity of the ground material, i.e. pack-setting or compaction thereof is prevented.
摘要:
The pouring repair material for mortar or the like wall characterized in that it consists essentially of a synthetic resin emulsion, cement and slags with particle size less than 0.5 mm, and in that the weight ratios P/C, C/S and W/C are adjusted to 0.1 to 3, 1.5 to 2.5 and 0.35 to 0.40, wherein P designates solid contents of the synthetic resin, C cement, S slags and W water.
摘要翻译:用于砂浆等的浇注修补材料,其特征在于,其基本上由合成树脂乳液,水泥和粒度小于0.5mm的炉渣组成,并且重量比P / C,C / S和W / C 调整为0.1至3,1.5至2.5和0.35至0.40,其中P表示合成树脂,C水泥,S炉渣和W水的固体含量。
摘要:
Hydraulic heat-resisting material of an improved thermal property which has high strength and high volume stability under high temperature is disclosed. The material substantially consists of 5 to 70 parts by weight of a mixture, the mixture consisting of 49.95 to 87.3% by weight of hydraulic cement, 49.95 to 9.7% by weight of amorphous silica and 0.1 to 3% by weight of a dispersing agent, and 95 to 30 parts by weight of a heat-resisting aggregate. Premold product made of the above material is also disclosed.
摘要:
Aqueous grouting compositions based on high alumina cement have the onset of setting delayed for upwards of one month by the incorporation therein of a set-inhibiting agent such as boric acid or gluconic acid delta lactone and can then be rapidly reactivated for use by the incorporation therein of a reactivator, for example lithium carbonate, to produce a high strength hardened cementitious composition. The reactivated composition can advantageously be used to anchor a reinforcing element such as a rockbolt or dowel in a borehole and for this purpose the set-inhibited cementitious composition and the reactivator can be packaged in the separate compartments respectively of a dual-compartment frangible cartridge.
摘要:
Cementing casing in an offshore well by displacing a drilling fluid with a settable cement slurry wherein there is injected into the annulus between the sidewall of the well and the casing ahead of the cement slurry a slug of a visually identifiable marker fluid containing cement, water, particulate carbon black, coal dust, and a surface active agent; visually observing when the fluid being displaced from the annulus changes from drilling fluid to marker fluid, and shutting in the well to allow the cement slurry to set.
摘要:
An expansive cement additive and a cementitious material added therewith, said expansive additive consisting of a pulverized product of clinker containing 15.about.60% by weight of free CaO, 5.about.30% by weight of free CaF.sub.2, 30.about.80% by weight of 11CaO.7Al.sub.2 O.sub.3.CaF.sub.2, and less than 10% by weight of other ingredients or a mixed pulverized product of said clinker and gypsum, in which the weight ratio of CaSO.sub.4 /Al.sub.2 O.sub.3 ranges from 1.0 to 3.5.
摘要翻译:一种膨胀水泥添加剂和一种水泥质材料,所述膨胀添加剂由熟料的粉碎产物组成,该粉碎产物含有15重量%的游离CaO,5重量%的游离CaF 2,30重量%的碳酸钙,30重量%的11CaO 0.7 Al 2 O 3·C 2 F 2和小于10重量%的其它成分或所述熟料和石膏的混合粉碎产物,其中CaSO 4 / Al 2 O 3的重量比为1.0-3.5。